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Dolby

Dolby Laboratories, Inc. is an American multinational technology company specializing in audio noise reduction, encoding, compression, and spatial audio technologies, as well as visual enhancements for entertainment, automotive, and consumer applications.^[1] Founded in 1965 by inventor Ray Dolby in London, England, the company has grown into a global leader with over 2,200 employees across more than 20 countries, headquartered in San Francisco, California, and publicly traded on the New York Stock Exchange under the ticker symbol DLB.^[2] Ray Dolby, born in 1933 in Portland, Oregon, developed an early interest in electronics, earning a bachelor's degree from Stanford University in 1957 and a PhD in physics from Cambridge University in 1961; after working at Ampex Corporation on video recording technologies, he established Dolby Laboratories to address noise issues in professional audio recording.^[2] The company's breakthrough came with the introduction of Dolby A-type noise reduction in 1966, which dramatically improved sound quality in music recordings and films, leading to its adoption in major productions like the 1971 film A Clockwork Orange.^[3] Over the decades, Dolby expanded into surround sound systems, licensing its technologies to thousands of films, billions of consumer devices, and broadcast services worldwide, earning founder Ray Dolby over 50 U.S. patents and numerous awards, including the National Medal of Technology in 1997 before his death in 2013.^[2]^[4] Among its most notable innovations are Dolby Digital, a multi-channel digital audio format introduced in the 1990s for cinema and home entertainment; Dolby Atmos, a revolutionary object-based spatial audio system launched in 2012 that creates immersive, three-dimensional soundscapes used in films, music, gaming, and automotive systems; and Dolby Vision, a high-dynamic-range (HDR) imaging technology providing enhanced color, contrast, and brightness for streaming and displays.^[5] In recent years, Dolby has advanced into automotive entertainment with integrations like Dolby Atmos in over 130 vehicle models as of 2025^[6] and introduced Dolby Vision 2 in September 2025 to optimize picture quality for modern televisions,^[7] while reporting fiscal year 2025 revenue of $1.35 billion driven by licensing and product growth.^[8]

History

Founding and Early Years

Ray Dolby, born on January 18, 1933, in Portland, Oregon, developed an early interest in electronics and sound technology. As a teenager, he began working part-time at Ampex Corporation in Redwood City, California, contributing to the development of the first practical videotape recorder while still in high school. Dolby worked at Ampex from his teenage years through college until earning his B.S. in electrical engineering from Stanford University in 1957. He then moved to England on a Marshall Scholarship to pursue a Ph.D. in physics at Cambridge University, which he completed in 1961. This was followed by two years working for UNESCO as a science adviser, primarily in India (1961-1963). It was during this period, while recording traditional Indian music for UNESCO, that Dolby identified persistent noise problems in tape recordings, sparking the idea for his noise reduction technology. Drawing on his expertise in audio engineering gained at Ampex, Dolby founded Dolby Laboratories in London in May 1965 with a small team of four employees, initially focusing on solutions to improve audio fidelity in professional recording environments.^[2]^[9]^[10]^[11] The company's inaugural innovation was the Dolby A-type noise reduction system, invented by Dolby between 1965 and 1966. This analog technology employed a compander (compressor-expander) circuit operating across four frequency bands, which reduced tape hiss and background noise by up to 10 dB through pre-emphasis of high-frequency signals during recording and de-emphasis during playback, thereby enhancing dynamic range without introducing audible artifacts. Demonstrated to Decca Records in November 1965, the system addressed a key limitation in magnetic tape recording prevalent in professional audio production at the time. The first production units, known as the Dolby A301, were delivered to Decca in April 1966 at a cost of £700 each, marking the debut of Dolby's core noise reduction approach.^[12]^[10]^[9] Early adoption of Dolby A centered on professional recording studios, where it quickly became a standard for multitrack tape machines. The first commercial music recording session using the system occurred in May 1966, and by November 1966, the inaugural long-playing (LP) record encoded with Dolby A-type noise reduction was released. Major labels such as RCA and MCA integrated the technology into their workflows by 1967, solidifying its role in high-fidelity music production and broadcast applications. This professional uptake laid the groundwork for Dolby's expansion, prompting the relocation of the company's headquarters from London to San Francisco, California, in January 1976 to better access the growing U.S. market and talent pool in audio engineering.^[9]^[10]^[2]

Key Milestones in Audio Innovation

In 1970, Dolby Laboratories introduced Dolby B, a consumer-oriented noise reduction system designed specifically for compact cassette tapes, which provided approximately 10 dB of noise reduction in high frequencies at a significantly lower cost than the professional-grade Dolby A system.^[13]^[14] This innovation made high-fidelity audio more accessible to home users by effectively suppressing tape hiss without the complexity and expense of multi-band processing used in studio environments.^[13] Building on its professional noise reduction foundations, Dolby expanded into cinema audio in 1975 with the debut of Dolby Stereo, a four-channel system that encoded left, center, right, and surround channels into a two-track optical soundtrack on 35 mm film prints.^[15] The format's practical implementation was first showcased in Ken Russell's Lisztomania, but it gained widespread acclaim and accelerated theater adoption through its use in George Lucas's Star Wars in 1977, which demonstrated the immersive potential of matrix-encoded surround sound for blockbuster films.^[15]^[16] The evolution toward home theater began in 1982 with the launch of Dolby Surround, an analog matrix system adapted from Dolby Stereo that allowed consumers to decode four channels—left, right, center, and mono surround—from standard stereo VHS and Betamax recordings via compatible decoders.^[17] This marked a pivotal shift in bringing cinema-like audio to living rooms, with early adoption in major studio releases by the mid-1980s.^[18] In 1987, Dolby enhanced this technology with Pro Logic, introducing active matrix decoding that more accurately separated and steered the center channel for dialogue clarity, while improving surround channel isolation from stereo sources. Pro Logic's superior phase and level detection enabled a more stable four-channel output, becoming a staple in home audio receivers and further popularizing multi-channel sound for television and video.^[19] A major leap to digital audio occurred in 1992 with the introduction of Dolby Digital (also known as AC-3), a discrete 5.1-channel codec that delivered uncompressed surround sound with independent channels for left, center, right, left surround, right surround, and low-frequency effects.^[20] The format premiered in theaters with Tim Burton's Batman Returns, where it was encoded directly onto the film print, providing cinema audiences with unprecedented dynamic range and spatial precision compared to analog predecessors.^[20]^[21] Dolby Digital's adoption extended to consumer media in 1996, when it was selected as a mandatory audio format for DVD specifications, enabling home viewers to experience 5.1-channel sound on the new optical disc platform and solidifying its role in the transition from analog to digital entertainment.^[22] This integration helped drive the DVD's market dominance, with early titles like Independence Day showcasing the codec's capabilities in bitrate-efficient compression for broadband audio delivery.^[23] The company's growth culminated in its initial public offering on February 17, 2005, when Dolby Laboratories listed on the New York Stock Exchange, raising $495 million at $18 per share and valuing the firm at approximately $1.7 billion.^[24]^[25] This milestone reflected the widespread licensing of its technologies across consumer electronics and media, transitioning Dolby from a private innovator to a publicly traded leader in audio standards.^[26] Ray Dolby, the founder and driving force behind these advancements, passed away on September 12, 2013, at age 80 in San Francisco after battling leukemia.^[2] Following his death, leadership transitioned to family members, including his widow Dagmar and son Tom, who continued to guide the company while emphasizing his legacy of innovation through philanthropy and ongoing technological development.^[27]^[28]

Expansion and Modern Developments

Dolby Laboratories has pursued strategic acquisitions to bolster its position in cinema and multimedia technologies. In 2014, the company acquired Doremi Labs, a leading provider of digital cinema servers and media servers, for $92.5 million in cash plus up to $20 million in contingent consideration, enhancing its capabilities in digital cinema distribution and playback.^[29] More recently, in 2024, Dolby completed the acquisition of GE Licensing from GE Aerospace for $429 million, adding over 5,000 patents focused on video codec and imaging technologies to strengthen its intellectual property portfolio.^[30] The company's business model has increasingly emphasized licensing, which accounted for over 90% of its revenue in recent years. In the third quarter of fiscal 2025, Dolby reported total revenue of $316 million, a 9% increase year-over-year, with licensing revenue reaching $290 million, representing approximately 92% of the total and also growing 9% from the prior year.^[31] This shift underscores Dolby's transition from hardware manufacturing to a high-margin, IP-driven licensor serving consumer electronics, broadcast, and entertainment sectors. Dolby expanded into cloud-based services with the launch of Dolby.io in May 2020, a developer platform providing APIs for integrating audio, video, and interactivity enhancements into applications.^[32] The platform supports scalable media processing for real-time communications, enabling developers to incorporate Dolby technologies without on-premises infrastructure. Philanthropic efforts by the Ray and Dagmar Dolby family have supported medical research, including a $20 million gift from the Ray and Dagmar Dolby Family Fund to UCSF's Department of Psychiatry in 2015 for advancing research and treatment of mood disorders like depression and bipolar disorder.^[33] Recent milestones highlight Dolby's integration into streaming and automotive ecosystems. Netflix began supporting Dolby Atmos immersive audio in June 2017, starting with original content like Okja, marking a key advancement in home entertainment delivery.^[34] As of September 2025, Dolby Atmos had been adopted by 30 automotive brands worldwide, including Audi, Mercedes-Benz, and Rivian, with partnerships enabling immersive in-car audio experiences across models like the Audi Q8 and Mercedes-Benz lineup.^[35]^[36]

Company Profile

Corporate Structure and Business Model

Dolby Laboratories, Inc. is headquartered at 1275 Market Street in San Francisco, California.^[37] The company maintains a global presence through subsidiaries and offices in over 20 countries, including Dolby International AB in Sweden, which oversees operations in Europe.^[38]^[37] Additional subsidiaries include Dolby Australia Pty Ltd and entities in regions such as Asia and the Middle East.^[39] The company's operations are divided into two primary business segments: Products and Services. The Products segment involves the development and sale of hardware solutions, such as cinema servers and professional audio equipment, which generated 7% of total revenue in fiscal year 2025.^[8] In contrast, the Services segment, focused on licensing intellectual property, accounts for 93% of revenue, derived from royalties paid by manufacturers integrating Dolby technologies into their devices.^[8] This licensing-heavy model emphasizes passive income streams over direct product sales.^[40] Dolby Laboratories possesses a robust patent portfolio of approximately 28,400 issued patents worldwide as of September 2025, spanning audio, video, and voice technologies, bolstered by the 2024 acquisition of over 5,000 additional patents from GE Licensing.^[30]^[41] These intellectual property assets form the core of the company's licensing revenue.^[42] Since its initial public offering in 2005, Dolby has been listed on the New York Stock Exchange under the ticker symbol DLB, with Class A common stock available to the public.^[43] The founding Dolby family retains significant control through ownership of Class B shares, which carry enhanced voting rights.^[44] Central to Dolby's business model are mandatory licensing agreements for devices incorporating its technologies, such as televisions, smartphones, and streaming services, where manufacturers pay royalties calculated on a per-unit-sold basis.^[40] These agreements ensure compliance through design approvals and testing prior to market release, generating steady royalty income as adoption grows.^[45]

Leadership and Philanthropy

Kevin Yeaman has served as President and Chief Executive Officer of Dolby Laboratories since 2009, guiding the company through its transition to a publicly traded entity and expansion into digital entertainment technologies.^[46] Prior to his CEO role, Yeaman joined Dolby in 2004 as Chief Financial Officer, where he built the financial infrastructure to support global growth; his earlier career included senior finance positions at Charles Schwab & Co. and Silicon Graphics, Inc., providing expertise in both financial management and technology sectors.^[46] As a director since assuming the CEO position, Yeaman also contributes to board oversight on strategic matters.^[47] Family involvement remains prominent in Dolby's governance following Ray Dolby's passing in 2013. David Dolby, son of founder Ray Dolby and philanthropist Dagmar Dolby, has served as a director since 2011 and participates in the board's technology strategy committee, focusing on long-term innovation opportunities.^[46] Dagmar Dolby, Ray's widow, holds significant influence through her oversight of the family's charitable efforts but does not serve on the company board; the board chair is Peter Gotcher.^[46] This family continuity underscores Dolby's commitment to preserving its innovative legacy amid evolving leadership.^[48] Dolby's philanthropic activities, led primarily through the Ray and Dagmar Dolby Family Fund established in 2002, emphasize health research, science, and the arts, with grants totaling tens of millions annually in recent years.^[49] The fund supported the construction of the Ray and Dagmar Dolby Regeneration Medicine Building at the University of California, San Francisco, with a $16 million gift in 2006; the facility, dedicated to stem cell and regenerative medicine research, opened in 2011.^[50] Additional major contributions include an £85 million donation from Ray Dolby's estate to the University of Cambridge in 2017 to advance interdisciplinary science.^[51] In the arts, Dolby supports independent filmmakers via the Dolby Institute Fellowship, providing $50,000 post-production grants and technical assistance using Dolby Vision and Atmos for projects at festivals like Sundance and Tribeca.^[52] The company also fosters STEM education through initiatives like the Dolby Creator Lab Grant, which equips emerging creators with tools to explore sound and imaging innovation.^[53] Dolby advances diversity and inclusion through employee networks and targeted programs, with its 2024 sustainability report noting steady increases in women in leadership roles and 25% female representation on the board.^[54] The Women's Empowerment Network (WE) promotes gender equity via events and mentorship, contributing to broader efforts that enhanced women's global representation in leadership by 2022.^[55] These initiatives align with Dolby's social impact goals, emphasizing equitable opportunities in technology and creative fields.^[55]

Audio Technologies

Noise Reduction Systems

Dolby Laboratories pioneered analog noise reduction technologies to address inherent hiss and noise in magnetic tape recordings, employing companding techniques that compress the dynamic range during recording and expand it during playback, thereby boosting low-level signals relative to noise without altering high-level signals significantly. These systems were essential for professional and consumer audio applications before the widespread adoption of digital recording. The foundational approach relied on frequency-selective processing to minimize artifacts like breathing or pumping, ensuring transparent audio reproduction. Dolby A, introduced in 1966 as the company's first professional noise reduction system, utilized a four-band compander design operating on discrete frequency ranges—typically below 80 Hz, 80 Hz to 3 kHz, 3 kHz to 10 kHz, and above 10 kHz—to achieve 10–20 dB of noise reduction across the audible spectrum. This sliding threshold compander applied gain only to signals below a certain level in each band, preventing distortion in louder passages while effectively suppressing tape hiss. Widely adopted in recording studios and broadcast facilities, Dolby A became a standard for multitrack tape machines, enabling cleaner masters for vinyl and early digital transfers. Building on this, Dolby B emerged in 1970 specifically for consumer cassette decks, featuring a single sliding-band compander that targeted high-frequency hiss with approximately 10 dB of reduction above 1 kHz. The sliding mechanism dynamically adjusted the compression threshold based on signal content, reducing potential distortion from over-compression of midrange frequencies and ensuring compatibility with non-Dolby equipment by limiting excessive high-frequency boost during encoding. This system revolutionized home taping by making cassettes viable for high-fidelity music playback, with widespread integration into portable and car audio devices by the mid-1970s. Dolby C, launched in 1980, advanced consumer noise reduction through a dual-band architecture that extended processing into the lower midrange, delivering up to 20 dB of reduction while incorporating anti-saturation circuitry to prevent overload from strong high-frequency signals like cymbals or sibilance. By applying a secondary band around 500 Hz to 1 kHz alongside the high-frequency band, it achieved a more uniform noise floor without the pumping artifacts common in earlier systems, though it required precise calibration for optimal results. Primarily used in hi-fi cassette recorders, Dolby C doubled the performance of Dolby B, enhancing dynamic range for pre-recorded tapes and live dubbing. For professional applications, Dolby SR (Spectral Recording), introduced in 1986, employed advanced adaptive spectral filtering to provide up to 24 dB of noise reduction, analyzing signal spectra in real-time to apply variable compansion across multiple overlapping bands. This technique minimized modulation noise and preserved transient detail better than fixed-band predecessors, using a wideband compressor for low frequencies and spectral skewing for highs to optimize headroom in analog mastering and film soundtracks. Its compatibility mode allowed seamless integration with Dolby A equipment, solidifying its role in broadcast and cinema until the late 1990s. A consumer variant, Dolby S, debuted in 1992 as an extension of SR technology, combining fixed and sliding bands for 10 dB low-frequency and 24 dB high-frequency reduction, with built-in anti-saturation to support hotter recordings on compact cassettes. It offered near-digital noise performance while maintaining backward compatibility with Dolby B decoders, though adoption was limited to high-end decks due to implementation costs. With the rise of digital recording formats like DAT and hard-disk systems post-2000, analog noise reduction systems like Dolby A, B, C, SR, and S saw declining use in new production, as digital inherently provided superior signal-to-noise ratios without companding artifacts. Nonetheless, they retain legacy value in archival restoration, where specialized decoders recover encoded analog tapes from pre-digital eras, preserving historical audio content for modern digital migration.

Surround Sound Formats

Dolby Surround, introduced in 1982, represents the company's first matrix-based surround sound technology designed for home video applications. This system encodes four discrete channels—left (L), center (C), right (R), and mono surround (S)—into two compatible stereo channels known as left total (Lt) and right total (Rt). The encoding process combines the front channels (L, C, R) with the surround information matrixed at a 90-degree phase shift to embed rear effects without disrupting standard stereo playback.^[17] Decoding relies on steering logic within the receiver, which analyzes amplitude and phase differences between Lt and Rt to directionally separate the surround channel from the front soundstage, providing a basic 4-channel experience from analog carriers like VHS tapes.^[15] Building on this foundation, Dolby Pro Logic, launched in 1987, enhanced matrix decoding by incorporating active extraction of a dedicated center channel and improved surround steering. Unlike basic Dolby Surround's passive matrix, Pro Logic employs a more sophisticated algorithm to derive the center signal from the sum of Lt and Rt, while enhancing directionality for the surround channel through adaptive correlation detection and low-pass filtering below 7 kHz to focus dialogue and effects.^[56] This technology became a staple for home entertainment, widely implemented on VHS and Laserdisc formats, where it delivered a 4.0-channel (L, C, R, S) output from stereo analog tracks, improving dialogue clarity and spatial immersion in consumer setups.^[57] The shift to digital formats arrived with Dolby Digital, also known as AC-3, standardized in 1992 as a discrete multichannel codec for broadcast and optical media. AC-3 supports 5.1 channels (L, C, R, Ls, Rs, and low-frequency effects) using perceptual coding techniques, including modified discrete cosine transform (MDCT) for frequency analysis and psychoacoustic modeling to allocate bits efficiently based on human auditory masking. Typical bitrates range from 384 kbps for 5.1-channel home use to 640 kbps for theatrical applications, enabling high-quality surround sound within limited bandwidth.^[58] The bit allocation process uses the power spectral density (PSD) and masking curve to compute an address value, which indexes a table to determine the number of bits for each coefficient, ensuring audibility while minimizing data usage.^[58] Dolby Digital Plus (E-AC-3), introduced in 2004, extends AC-3 with enhanced compression efficiency, supporting up to 7.1 channels (adding rear surrounds) through advanced tools like enhanced channel coupling, transient preprocessing, and variable bitrate allocation up to 6 Mbps. This yields approximately six times the coding efficiency of AC-3 for equivalent quality, allowing richer surround experiences at lower bitrates (e.g., 192–768 kbps for broadcast).^[59] These formats found widespread adoption in DVDs (primarily AC-3 at 448 kbps for 5.1), Blu-ray discs (supporting both AC-3 and E-AC-3 for higher channel counts), and streaming services, where E-AC-3 enables efficient delivery of multichannel audio over IP networks without compromising fidelity.^[60] Dolby TrueHD, introduced in 2004, is a lossless multichannel audio codec that delivers uncompressed sound quality equivalent to the original studio master, supporting up to 7.1 channels or more (including Atmos configurations) at bitrates up to 18 Mbps. Using Meridian Lossless Packing (MLP) compression, it preserves full dynamic range and fidelity for high-resolution audio, making it ideal for Blu-ray Discs and premium home theater systems where bandwidth allows. Unlike lossy formats, TrueHD enables bit-for-bit identical reproduction of the source, and has been widely adopted in 4K UHD Blu-ray for immersive content.^[61]

Immersive Audio Solutions

Dolby Atmos, introduced in 2012, represents a pivotal advancement in immersive audio by employing object-based rendering to create three-dimensional soundscapes. Unlike traditional channel-based systems, Dolby Atmos utilizes up to 128 audio tracks, comprising a fixed "bed" of channels and dynamic audio objects accompanied by metadata that specifies their precise placement in a virtual 3D space. This metadata defines each object's position using coordinates in a spherical system, expressed as Position = (x, y, z), where x denotes azimuth, y elevation, and z distance relative to the listener, enabling sounds to move freely above, around, and beyond the audience. The renderer processes these objects in real time, adapting the audio to the available speaker configuration for a seamless, enveloping experience.^[62]^[63]^[64] Common home theater configurations for Dolby Atmos range from 5.1.4 to 7.1.4, where the notation indicates base channels (e.g., 5 for front and surround speakers plus subwoofer), followed by height channels (e.g., 4 overhead or upward-firing speakers). These setups combine a channel bed—typically 7.1 or 5.1—with up to 118 movable objects, allowing for flexible scaling across devices from cinemas to consumer systems. The technology debuted in film with Gravity in 2013, which showcased its potential through dynamic spatial effects like orbiting sounds and overhead ambiance, immersing viewers in the film's zero-gravity sequences.^[65]^[66]^[67] Extending beyond cinema, Dolby Atmos for Music launched in 2016, adapting the object-based format for stereo and multichannel music production with binaural rendering to simulate 3D audio over headphones. This enables artists to position instruments and vocals in a height-enabled soundfield, delivering depth and movement not possible in stereo. The format has been integrated into streaming services, including Apple Music for spatial playback since 2021 and Amazon Music for immersive tracks, allowing listeners to experience music as a dynamic environment rather than a flat plane.^[68]^[69] In 2025, Dolby introduced Atmos FlexConnect, enhancing home setups by enabling wireless speakers to connect flexibly without fixed positions, with the system automatically optimizing object rendering to the room's acoustics and layout. This innovation supports seamless integration of TVs and accessory speakers, broadening access to immersive audio in varied living spaces.^[70]^[71] For broadcast applications, Dolby Atmos integrates with the AC-4 codec, standardized in 2017, which efficiently encodes immersive content at lower bitrates while preserving object metadata for 3D playback. AC-4's support for Atmos enables next-generation TV services to deliver height-channel audio alongside traditional channels, facilitating personalized and accessible experiences in ATSC 3.0 and other standards.^[72]^[73]

Video and Imaging Technologies

Dolby Vision and HDR

Dolby Vision is a proprietary high dynamic range (HDR) imaging technology developed by Dolby Laboratories and introduced in January 2014 as an end-to-end solution for enhancing video content creation, delivery, and display.^[74] It leverages dynamic metadata embedded in the video stream to enable precise, scene-by-scene adjustments, ensuring optimal brightness, contrast, and color reproduction tailored to individual display capabilities.^[75] This approach supports up to 12-bit color depth for over 68 billion shades and peak brightness levels reaching 10,000 nits, far exceeding standard dynamic range limits to deliver more lifelike visuals with deeper blacks and brighter highlights.^[76] The core of its tone mapping process can be expressed as

L_{\text{out}} = f(L_{\text{in}}, \text{metadata})

where L_{\text{out}} is the output luminance, L_{\text{in}} is the input luminance, and the function f dynamically adjusts based on the metadata to match the target display's performance.^[74] Dolby Vision employs various profiles to accommodate different encoding and playback scenarios, balancing quality and compatibility. Single-layer profiles encode the HDR content in a single video stream, providing backward compatibility with non-Dolby Vision devices by falling back to a base layer like HDR10 or SDR.^[77] In contrast, dual-layer profiles utilize a base layer for compatibility alongside a separate enhancement layer that unlocks full Dolby Vision capabilities on supported hardware, preserving the creator's intent without compromise.^[78] The technology gained rapid adoption in consumer electronics, with integration into televisions from manufacturers like LG and Sony, and streaming services; Netflix began supporting Dolby Vision content in 2015, remastering titles such as Marco Polo to showcase its benefits.^[79] In 2020, Dolby introduced Dolby Vision IQ as an enhancement to the original format, incorporating ambient light sensors in compatible TVs to automatically adapt tone mapping and brightness based on room lighting conditions, ensuring consistent viewing quality across environments.^[80] This feature analyzes incoming light levels in real-time alongside the dynamic metadata to refine the electro-optical transfer function (EOTF), preventing washed-out images in bright rooms or crushed details in dim ones.^[81] Building further on this foundation, Dolby announced Dolby Vision 2 on September 2, 2025, which incorporates AI-driven enhancements for upscaling lower-resolution content and more intelligent tone mapping, optimized for next-generation displays including Micro LED panels. Hisense announced the first TVs supporting Dolby Vision 2 at IFA 2025, with broader availability expected in 2026.^[82]^[83] It supports 16-bit processing in professional workflows to enable precision in color grading and output, including features like content-aware motion control and genre-specific optimizations.^[84] Compared to the open-standard HDR10, which relies on static metadata applied uniformly across an entire program, Dolby Vision's proprietary dynamic metadata allows for granular, per-scene optimizations that better preserve artistic intent on diverse displays, from entry-level to high-end models.^[75] This results in superior handling of challenging scenes with extreme contrasts, such as starry nights or explosive action, where HDR10 may require manual display adjustments.^[85]

Image Processing Innovations

Dolby's image processing innovations encompass a range of technologies designed to enhance video quality in broadcast and consumer devices, particularly through advanced tone mapping and color adaptation techniques that operate independently of full HDR frameworks. These tools enable seamless conversion and optimization of content across varying display capabilities, ensuring consistent visual fidelity without relying solely on high dynamic range standards.^[86] Prior to the widespread adoption of HDR, Dolby developed tone mapping algorithms, including inverse tone mapping—also known as upmapping—for converting standard dynamic range (SDR) content to an HDR-like appearance. This process analyzes SDR signals to expand contrast and brightness ranges, creating enhanced highlights and deeper shadows while preserving overall image integrity, which proved essential for early transitions to advanced displays in the early 2010s.^[87] In the 2010s, Dolby introduced dynamic range re-mapping (DRR) algorithms tailored for wide color gamut (WCG) adaptation, allowing content to be optimized for displays supporting expanded color spaces like DCI-P3 or Rec.2020 without introducing artifacts such as clipping or desaturation. These algorithms dynamically adjust luminance and chrominance values to map source material onto target gamuts, improving color accuracy and vibrancy in non-HDR environments, such as legacy broadcast systems. For instance, DRR facilitates real-time processing in consumer electronics to maintain perceptual consistency across devices with differing color capabilities.^[84] Dolby Vision content creation tools provide professional software suites for color grading that support the Rec.2020 color space, enabling creators to work in wide gamut environments while generating both HDR and SDR deliverables from a single master. These tools, integrated into applications like DaVinci Resolve and Baselight, include trim controls for fine-tuning saturation and hue during gamut mapping, ensuring high-fidelity results for broadcast and streaming workflows. By leveraging perceptual quantizers like ST.2084 (PQ), the software allows precise control over mid-tones and highlights, streamlining production for non-HDR compatible outputs.^[84]^[86] Since 2014, Dolby has integrated image processing with audio systems in premium cinema environments, where combined algorithms synchronize visual enhancements with immersive sound rendering directly at the projector level. This unified approach processes video signals to align peak brightness and color timing with audio cues, enhancing narrative immersion without separate hardware dependencies, as seen in early Dolby Cinema deployments.^[88] In 2025, Dolby advanced these innovations with AI-based upscaling within the Dolby Vision 2 ecosystem, introducing Content Intelligence—a machine learning system that analyzes content patterns and ambient conditions to upscale lower-resolution or SDR sources in real-time. This feature employs neural networks to predict and reconstruct details, improving sharpness and reducing aliasing on modern displays, while adapting dynamically to viewer environments for optimal non-HDR playback. Initial implementations were announced at IFA 2025.^[82]

Applications

Cinema and Broadcast

Dolby Cinema, launched in late 2014 as a premium theatrical format, represents a collaborative effort between Dolby Laboratories and AMC Theatres, with the first locations opening in 2015. This joint venture integrates Dolby Atmos immersive audio with dual 4K laser projection systems supporting Dolby Vision high dynamic range (HDR) imaging, delivering enhanced contrast, color accuracy, and spatial sound in dedicated auditoriums. By 2025, AMC operates over 150 Dolby Cinema screens across the United States, contributing to a global network of over 250 locations that prioritize cinematic experiences with superior visual and auditory fidelity.^[89]^[90]^[91] In digital cinema distribution, Dolby has played a key role in advancing Digital Cinema Package (DCP) standards through contributions to the Society of Motion Picture and Television Engineers (SMPTE). Specifically, Dolby enables the inclusion of encrypted Dolby Atmos audio tracks within SMPTE-compliant DCPs, using auxiliary MXF files secured by symmetric content keys to protect immersive sound data during transport and playback. This integration ensures that Atmos content—featuring object-based audio rendering—can be securely delivered to theaters equipped with compatible processors, maintaining synchronization with video while adhering to industry encryption protocols.^[92] Dolby's influence extends to television broadcasting, where its audio codecs have been integral to U.S. standards evolution. The AC-3 (Dolby Digital) format was adopted as part of ATSC 1.0 in 1995 via the A/52 standard, providing efficient 5.1-channel surround sound compression for digital terrestrial television and enabling widespread deployment of multichannel audio in broadcasts. Building on this, Dolby AC-4 was standardized for ATSC 3.0 in 2017, offering advanced features like immersive audio support for Dolby Atmos, personalized sound optimization, and dialogue enhancement at lower bitrates suitable for next-generation over-the-air transmission.^[93]^[72] For live sound applications in the 2000s, Dolby introduced the Lake Processor series following its 2003 acquisition of Lake Technology, targeting professional concert and event environments. Released in 2006, the Dolby Lake Processor provided digital signal processing for loudspeaker management, including low-latency equalization, crossover filtering, and limiting tailored for high-power live reinforcement systems used in major tours and venues. These processors became a staple in the live audio industry during the decade, offering Mesa configuration software for precise tuning of arrayed speaker systems to achieve uniform coverage and clarity in large-scale performances.^[94] By 2025, Dolby Vision has advanced into broadcast trials, particularly for 4K UHD content, with demonstrations integrating HDR workflows in live events to enhance color depth and dynamic range over traditional SDR transmissions. For instance, broadcasters like Gray Television conducted trials in 2024 using Dolby Vision for 4K sports coverage, paving the way for broader adoption in ATSC 3.0 ecosystems that support higher resolutions up to 4K with immersive metadata. These efforts highlight Dolby's push toward professional broadcast infrastructure capable of delivering cinema-quality visuals to linear TV audiences.^[95]

Consumer Electronics and Home Entertainment

Dolby technologies have become integral to consumer electronics, particularly in televisions and smartphones, through extensive licensing agreements with major manufacturers. For instance, Apple's iPhone 16 series supports both Dolby Atmos for audio and Dolby Vision for video, enabling high-quality playback on mobile devices.^[42] Similarly, Samsung integrates Dolby Atmos into its Galaxy smartphones and QLED TVs, enhancing spatial audio experiences without requiring additional hardware. These partnerships ensure Dolby's audio and video solutions are embedded in premium consumer devices, delivering immersive content directly to users at home. In home theater systems, Dolby TrueHD represents a cornerstone for lossless audio reproduction, introduced in 2005 as a high-definition format for disc-based media.^[96] Designed specifically for Blu-ray Discs, it supports up to 7.1 discrete channels of uncompressed, studio-master-quality sound at resolutions of 24-bit/96 kHz, preserving the original audio fidelity without data loss.^[97] This technology allows home users to experience cinema-like surround sound through compatible AV receivers and Blu-ray players, making it a standard for physical media enthusiasts seeking reference-level audio performance. Streaming services have further expanded Dolby's reach in home entertainment, with platforms like Disney+ incorporating Dolby Atmos and Dolby Vision exclusively in their premium subscription tiers. The Disney+ Premium plan, priced at $18.99 per month in the US as of October 2025, enables access to immersive 3D audio via Dolby Atmos and high dynamic range video with Dolby Vision on select titles, such as Marvel and Star Wars content, requiring compatible devices like smart TVs or streaming boxes.^[98]^[99] This integration elevates on-demand viewing by providing object-based audio that moves sound dynamically around the room, enhancing narrative immersion without the need for dedicated home theater setups.^[100] Soundbars equipped with Dolby Atmos have simplified home audio upgrades, often employing virtual height channels to simulate overhead effects without physical ceiling speakers. In 2025, innovations like Dolby Atmos FlexConnect introduced flexible wireless speaker placement, allowing users to position compatible soundbars or add-on speakers anywhere in the room while the system automatically optimizes for spatial audio.^[70] For example, TCL's 2025 QD-Mini LED TVs pair with FlexConnect-enabled soundbars, such as the Z100 system, to deliver 1.1.1-channel Atmos sound tailored to irregular room layouts, reducing setup complexity for everyday consumers.^[101] Gaming consoles have also adopted Dolby technologies to enhance interactive experiences, with the PlayStation 5 incorporating Dolby Atmos support since its 2020 launch, initially for Blu-ray playback and later expanded to games via software updates.^[102] This enables developers to render 3D audio environments where sounds like footsteps or explosions position dynamically in space, compatible with Atmos-enabled headphones or home systems, thereby immersing players in virtual worlds with cinematic precision.^[103]

Automotive and Emerging Sectors

Dolby has significantly expanded its immersive audio technologies into the automotive sector, with Dolby Atmos integrated into vehicles from more than 30 leading car brands worldwide by 2025, including BMW and Volvo, effectively doubling the adoption from the previous year.^[36]^[104] This integration enhances in-car entertainment by delivering multidimensional sound that adapts to the vehicle's cabin, providing passengers with a theater-like experience during drives. At CES 2025, Dolby showcased innovations in automotive audio, including demonstrations of Dolby Atmos in aftermarket solutions via partnerships like Pioneer, highlighting support for Apple CarPlay with spatial audio capabilities.^[105]^[106] In gaming, Dolby Access serves as the primary application for enabling Dolby Atmos on Xbox and PC platforms, allowing users to experience spatial audio that places sounds in a three-dimensional environment for heightened immersion and competitive advantage.^[107] Titles such as Fortnite support Dolby Atmos, optimizing audio cues like footsteps and environmental effects to improve gameplay awareness through precise sound positioning.^[108]^[109] This technology leverages the immersive audio principles of Dolby Atmos to create dynamic soundscapes beyond traditional stereo output. Dolby Voice, launched in 2016 as a cloud-based audio solution for video conferencing, incorporates advanced noise suppression to eliminate background distractions and ensure clear, natural conversations across platforms.^[110] Building on this, subsequent enhancements include AI-driven noise suppression features that dynamically reduce stationary sounds like engine hums or echoes, enhancing voice isolation in real-time during calls.^[111]^[112] Dolby.io provides developers with cloud-based APIs for integrating audio, video, and media processing into applications, with 2025 updates expanding support for Dolby Vision processing through tools like Hybrik for efficient transcoding and HDR content handling.^[113]^[114] These APIs enable scalable deployment of immersive experiences, such as real-time video enhancement, without requiring on-premises hardware.^[115]

Controversies and Criticisms

ATSC Standard Selection

In 1993, the Grand Alliance, a collaborative effort involving major U.S. broadcasters, equipment manufacturers, and research institutions, was formed under the auspices of the FCC's Advisory Committee on Advanced Television Service (ACATS) to develop a unified high-definition television (HDTV) standard for digital terrestrial broadcasting in North America.^[116] A key component of this project was the selection of an audio compression system capable of supporting advanced multichannel formats within the limited bandwidth of digital TV signals. Three primary candidates competed: Dolby's AC-3, which offered perceptual coding for up to 5.1 channels; MUSICAM (a multichannel extension of MPEG-1 Audio Layer II), promoted by Philips and based on an open standard; and PAC (Precision Adaptive Subband Coding), developed by MIT and focusing on adaptive subband techniques for efficiency.^[116]^[117] Following rigorous comparative laboratory tests conducted in late 1993, the Grand Alliance recommended AC-3 in October 1993, with formal approval by the full ACATS committee in November 1993.^[118] The final selection of AC-3 occurred in March 1994, driven by its superior performance in subjective listening evaluations, particularly for delivering high-quality 5.1-channel surround sound at bitrates as low as 384 kbps, which was deemed sufficient for broadcast applications without perceptible degradation.^[116]^[118] This bitrate efficiency allowed AC-3 to fit within the ATSC transport stream constraints while supporting immersive audio experiences, outperforming MUSICAM and PAC in multichannel scenarios despite the latter's strengths in stereo compression.^[118] The selection process drew criticisms for its perceived lack of transparency and potential bias toward proprietary technologies. Conducted largely through closed ACATS working groups dominated by industry players like General Instrument and Zenith (key Grand Alliance members and Dolby partners), the evaluations were not fully open to public scrutiny, raising concerns about favoritism toward AC-3 over more accessible alternatives like MUSICAM, which benefited from MPEG's royalty structure.^[116] Additionally, AC-3's licensing royalties, administered by Dolby, were higher than those for MPEG-based systems—estimated at a modest but notable premium per decoder—potentially increasing costs for manufacturers and consumers compared to open standards.^[119] Critics argued that this proprietary approach could stifle broader adoption and innovation in digital TV equipment, though proponents highlighted AC-3's technical merits and long-term value in enabling 5.1 audio as a differentiator for HDTV.^[119] As a result, AC-3 was formalized in the ATSC Document A/52, adopted as a standard by the Advanced Television Systems Committee on November 10, 1994, and fully ratified on December 20, 1995. The FCC subsequently mandated the ATSC 1.0 standard, including AC-3 for audio, in its Fourth Report and Order adopted December 24, 1996 (published March 25, 1997), establishing it as the U.S. digital terrestrial television framework and requiring broadcasters to transition from analog NTSC by 2006 (later extended to 2009).^[120] This decision entrenched AC-3 as the core audio codec for over two decades of U.S. over-the-air broadcasting, supporting everything from stereo to 5.1-channel content in HDTV and standard-definition services.^[121] By 2025, the legacy of the AC-3 selection continues to influence the ongoing rollout of ATSC 3.0 (NextGen TV), where stations must simulcast AC-3 audio in legacy ATSC 1.0 signals alongside newer codecs like Dolby AC-4 to ensure compatibility with existing receivers during the voluntary transition.^[122] This dual-audio requirement has introduced operational complexities and costs for broadcasters, as ATSC 3.0 prioritizes more advanced immersive formats (e.g., Dolby Atmos via AC-4), highlighting persistent challenges from the 1990s choice of a proprietary system that now necessitates backward compatibility amid a market-driven shift to IP-based broadcasting.^[123]^[122]

Patent Infringement Lawsuits

In August 2024, Dolby Laboratories filed a patent infringement lawsuit against Roku, Inc. in the U.S. District Court for the Northern District of California, alleging that Roku willfully infringed multiple Dolby patents related to audio and video technologies, including Dolby Atmos, Dolby Vision, and Dolby Digital, by incorporating them into its streaming devices and software without proper licensing. Dolby claimed that Roku's actions allowed it to offer enhanced features to attract customers and increase profits at Dolby's expense. Roku denied the allegations and countersued, arguing that Dolby's patents are invalid or not infringed. As of July 2025, the court granted in part and denied in part Roku's motion to dismiss certain claims, allowing the case to proceed on key infringement allegations.^[124]

Broadcast Audio Loudness Issues

In the 2000s, the adoption of Dolby's AC-3 audio codec in digital television broadcasting contributed to the "loudness wars," where commercials were often compressed to exploit the format's wide dynamic range, resulting in perceived volumes 10–20 dB louder than surrounding programs.^[125] This practice maximized advertiser impact but frustrated viewers, as AC-3's ability to handle high peaks without clipping allowed aggressive compression that elevated average loudness while preserving headroom.^[126] The technical root lay in the absence of mandatory loudness normalization standards during AC-3's early deployment; its metadata, including the dialogue normalization (dialnorm) parameter for dialog gating, was routinely misused by setting falsely low values, tricking decoders into amplifying commercial audio beyond program levels.^[127] Without dialog-gated measurement protocols like those later defined in ITU-R BS.1770, this exploitation evaded peak-level restrictions, amplifying perceived loudness through sustained high-energy content in ads.^[128] Regulatory measures emerged to curb these issues, with the U.S. Commercial Advertisement Loudness Mitigation (CALM) Act of 2012 enforcing ATSC A/85 compliance, mandating dialog-gated program loudness at -24 LKFS to ensure seamless transitions between content and ads.^[129] In Europe, the EBU R128 recommendation similarly standardized broadcast audio at -23 LUFS, promoting integrated loudness metering to prevent discrepancies across program segments.^[130] Dolby addressed these criticisms in its successor codec, AC-4, standardized in 2017 with built-in intelligent loudness management that automates normalization using dialog-gated metrics and dynamic range control metadata, reducing the risk of exploitation in broadcast chains.^[72] As of 2025, ATSC 3.0 implementations incorporating AC-4 continue to face challenges in maintaining consistent loudness amid variable bitrate streams, necessitating robust encoder compliance to uphold regulatory targets.^[123]

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Audio quality on Disney+
*Disney+ (With Ads) subscriptions do not currently support audio in Dolby Atmos or IMAX Enhanced sound. **IMAX Enhanced sound is currently supported on select ...
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Experience Disney Plus in Dolby Atmos and Dolby Vision
Feel the magic of Disney+ in Dolby Atmos & Dolby Vision. Elevate your home theater with immersive, cinematic technology and upgrade your viewing experience.
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TCL Brings Dolby Atmos FlexConnect to 2025 QD-Mini LED TVs
May 27, 2025 · Dolby Atmos FlexConnect is a new feature that unlocks the ability to place speakers anywhere you choose, while optimizing the sound experience to fit any room ...Missing: virtual height
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PlayStation®5 console gaming in Dolby Atmos
Playing on the PS5 console draws you into high-quality visuals and uses the innovative Tempest 3D AudioTech to deliver multidimensional Dolby Atmos sound.
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PS5 Beta Finally Adds Support for Dolby Atmos HDMI Devices ... - IGN
Jul 31, 2023 · To turn on Dolby Atmos, go to [Settings] > [Sound] > [Audio Output] > [Audio Format (Priority)], and then select [Dolby Atmos]. The beta also ...
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The Final Frontier of Luxury in Autos Is Sound - Bloomberg.com
May 12, 2025 · Last year the number of car brands supporting Atmos went from 10 to more than 20, including Mercedes-Benz, Rivian Automotive, Polestar and ...
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Dolby Revs Up In-Car Entertainment Innovations at CES 2025
Jan 7, 2025 · In the last year alone, Dolby has more than doubled the number of auto manufacturers supporting Dolby Atmos from ten to 20+ companies, which ...
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PIONEER SHOWCASES INNOVATIVE 4-CHANNEL IN-VEHICLE ...
Jan 6, 2025 · Pioneer showcases an immersive in-vehicle listening experience that combines Apple CarPlay, which now includes support for Spatial Audio and Dolby Atmos.
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Elevate Your Game with Dolby & Dolby Access
Get Dolby Atmos and Dolby Vision for your gaming setup. Download the Dolby Access app, connect your devices, and experience gaming like never before.Missing: Fortnite | Show results with:Fortnite
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Does Fortnite Support Dolby Atmos? - Playbite
Yes, Fortnite supports Dolby Atmos, enhancing your gaming experience with immersive sound!
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Fortnite - Best Audio Settings for Footsteps - DOLBY ATMOS
Jun 17, 2023 · Here we look into Fortnite and the optimizations Dolby can provide. Per usual I go into some depth for why this works and how, ...Missing: spatial | Show results with:spatial
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[PDF] Dolby Laboratories, Inc. 2016 Annual Report - AnnualReports.com
Nov 18, 2016 · In the third quarter of fiscal 2016, we launched Dolby. Voice with Highfive, a cloud-based collaboration and video conferencing solution that is ...<|separator|>
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Enhance Audio by Removing Stationary Background Noise
May 27, 2020 · Stationary background noise like the roar of an airplane engine can be removed by tuning the noise reduction and dialog isolation features ...
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Dolby Voice wants to drown out the humdrum in your Zoom calls
Jan 11, 2021 · A new software solution that claims to make voices more even, take out unwanted background noises, and move simultaneous voices from mono into stereo mode.<|separator|>
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Hybrik - Cloud Media Processing - Dolby Professional
Hybrik lets you quickly and easily generate all the files you need, using unparalleled transcoding and media technologies including Dolby Vision and Dolby Atmos ...
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Dolby.io - Documentation - qibb
Dolby.io is a platform that offers developers a range of audio and video APIs and SDKs to enhance their applications with immersive media capabilities. With ...
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Enhance Your Audio With Dolby.io For Higher Quality Transcripts
An excellent tool for improving the quality of audio is Dolby.io's Media Enhance API. With this API, all I have to do is make a POST request with the audio ...
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[PDF] HDTV: The Engineering History
Dec 10, 1999 · By the time when the Grand Alliance was formed, three audio system were proposed for future use: the. Dolby AC-3 system advocated by GI ...<|separator|>
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Grand Alliance HDTV | GlennReitmeier.TV
Comparative testing results in the selection of Dolby's AC-3 audio subsystem. . Jan 1994 – Comparative laboratory testing of Zenith's VSB hardware and ...Missing: MUSICAM PAC
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[PDF] Productivity Commission Inquiry into Broadcasting
Nov 29, 1999 · The royalty cost of AC-3 decoders is modest. While slightly higher than MPEG-1 stereo audio decoders, product manufacturers (Dolby licensees) ...
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Advanced Television Systems and Their Impact Upon the Existing ...
Adopted: July 28, 1995; Released: August 9, 1995 ... " That standard includes discrete subsystem descriptions for video source coding and compression, audio ...
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[PDF] October 7, 2025 FCC FACT SHEET∗ Authorizing Permissive Use of ...
Oct 7, 2025 · Background: Next Gen TV (which uses the “ATSC 3.0” or “3.0” standard) is the future of broadcast television. ATSC 3.0 promises to revitalize ...Missing: 2020s | Show results with:2020s
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[PDF] ATSC 3.0 Dolby Audio Handbook
AC-4 supports delivery of CM content for stereo, 5.1-ch and Dolby Atmos content. In addition to working with CM mixes, AC-4 is able to deliver a single common ...
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[PDF] Audio Loudness and Dynamic Range in the Compressed Digital ...
This paper shows how features provided by the AC-3 audio compression standard allow a single encoded bit stream to supply an appropriate dynamic range to all ...
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[PDF] Loudness and Dynamic Range in broadcast audio - the Dolby solution
Digital delivery media offer a wider dynamic range for audio than their analogue predecessors. This entails adopting a larger difference between the average ...
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[PDF] Audio Loudness – A Guide to CALM Act Compliance | Telestream
Dolby uses a 'Dialog. Norm' reference level in their AC3 audio compression which is a measure of the A-weighted average level of dialog within a presentation ...
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[PDF] Digital Television Audio Loudness Management
AC-3 stream to match the measured average loudness of complete shows or complete commercials it accompanied. Decoders would apply the specific dialnorm ...
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https://www.nctatechnicalpapers.com/Paper/1995/1995-audio-loudness-and-dynamic-range-in-the-compressed-digital-environment/download
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Loudness | EBU Technology & Innovation
Basically EBU R 128 recommends to normalize audio at -23 LUFS ±0.2 LU (±1 LU for live programmes), measured with a relative gate at -10 LU. The metering ...