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Website | dolby |
Dolby Atmos is a surround sound technology developed by Dolby Laboratories. It expands on existing surround sound systems by adding height channels, interpreted as three-dimensional objects with neither horizontal nor vertical limitations. [1] [2] Following the release of Atmos for the cinema market, a variety of consumer technologies have been released under the Atmos brand. The initial cinema Atmos systems used in-ceiling speakers, then upward-firing speakers (e.g. for soundbars) were introduced as an alternative for consumer products. [3] Atmos is also used on some devices that do not have a height channel, such as headphones, televisions, mobile phones, and tablets. [4] [5] [6]
The first Dolby Atmos installation was in the El Capitan Theatre in Los Angeles, for the premiere of Brave in June 2012. [7] Throughout 2012, it saw a limited release of about 25 installations worldwide, with an increase to more than 300 locations in 2013. [8] As of April 2023, there were over 7,800 cinema screens, across 105 countries, which supported or were committed to support Dolby Atmos. [9] Dolby Atmos has also been adapted to a home theater format and is the audio component of Dolby Cinema. [10] Electronic devices from 2016 onwards, along with smartphones starting in 2017, have included support for Dolby Atmos recording and mixing capabilities. The full set of technical specifications for Dolby Digital Plus with Dolby Atmos are standardized and published in ETSI TS 103 420. [11]
In 2016 Power was the first television show natively mixed and broadcast in Atmos for its third season, though in the same year, Game of Thrones up-mixed their previous 5.1 presentations for the Blu-ray reissue. [12] R.E.M.'s 1992 album Automatic for the People was the first major music release with its 25th anniversary reissue in 2017. [13]
In 2022, Dolby Atmos partnered with NetEase to offer spatial audio to the Chinese music streaming market. The partnership will entail NetEase to implement Atmos support on compatible smartphones and vehicles. [14]
Dolby Atmos technology allows the storage and distribution of 128 audio tracks with metadata describing sound properties such as position and volume (and their variation over time). The audio mix is rendered specifically for the theater's setup using the loudspeakers available. [15] Each audio track can be assigned to an audio channel, the conventional format for distribution, or to an audio "object". Dolby Atmos in theaters has a 9.1 (commonly referred to as 7.1.2) channel-based "bed" channels for ambience stems or center dialogue, leaving 118 tracks for objects. [16] Atmos for home in film, television, and music uses a technique called "spatial coding" to reduce the audio to up to a maximum of 16 concurrent "elements" or audio location clusters, that adapt to the content dynamically. [17] In Atmos games ISF (Intermediate Spatial format) is used, which supports 32 total active objects (using a 7.1.4 bed, 20 additional dynamic objects can be active). [18] Each object specifies its apparent source location in the theater as a set of three-dimensional rectangular coordinates relative to the defined audio channel locations and theater boundaries. [19]
Dolby Atmos home theaters can be built upon conventional 5.1 and 7.1 layouts. For Dolby Atmos, the nomenclature differs slightly by an additional number at the end, that represents the number of overhead or Dolby Atmos enabled speakers: a 7.1.4 Dolby Atmos system is a conventional 7.1 layout with four overhead or Dolby Atmos enabled speakers. [20] [21] The simplest Dolby Atmos setup is 3.1.2, [22] the most complex one is 24.1.10. [15]
Dolby Atmos content is authored using compatible digital audio workstation software (Dolby supplies a plug-in for Pro Tools and Cubase) or a suitably equipped large format audio mixing console such as AMS Neve's DFC or Harrison's MPC5. [23]
The Dolby Atmos sound system consists of a compatible speaker system, a TV or AV media player, and an AV receiver (or preprocessor), with a Dolby Atmos object audio renderer. During playback, each theater's Dolby Atmos system renders the audio objects in real time based on the known locations of the loudspeakers present in the target theater, such that each audio object is heard as originating from its designated set of coordinates. [15] By way of contrast, conventional multichannel technology essentially burns all the source audio tracks into a fixed number of channels during post-production. This has conventionally forced the re-recording mixer to make assumptions about the playback environment that may not apply very well to a particular theater. The addition of audio objects allows the mixer to be more creative, to bring more sounds off the screen, and be confident of the results. [24]
The first-generation cinema hardware, the "Dolby Atmos Cinema Processor", supports up to 128 discrete audio tracks and up to 64 unique speaker feeds. [25] The technology was initially created for commercial cinema applications, and was later adapted to home cinema. [26] [27] In addition to playing back a standard 5.1 or 7.1 mix using loudspeakers grouped into arrays, the Dolby Atmos system can also give each loudspeaker its own unique feed based on its exact location, thereby enabling many new front, surround, and even ceiling-mounted height channels for the precise panning of select sounds such as a helicopter or rain. [24]
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In June 2014, Dolby Laboratories' hardware partners announced the introduction of Dolby Atmos technology for home theaters [28] Following this announcement, Dolby Atmos-enabled movies became accessible through Kaleidescape's movie players. [29] [30] A public demonstration of Dolby Atmos in a home theater setting took place during the CEDIA Expo 2014, utilizing a Trinnov Audio Altitude 32 processor. [31]
Several audio equipment manufacturers, including Denon, Marantz, Onkyo, Pioneer, and Yamaha introduced products compatible with Dolby Atmos, ranging from high-end home cinema receivers and preamplifiers to mid-range home-theater-in-a-box (HTiB) packages. [32] [33] [34] [35] [36] [37] On June 4, 2018, it was announced by Apple that tvOS12 for Apple TV 4K would support Dolby Atmos when released in fall 2018. [38]
Dolby Atmos-enabled speakers are available in two configurations:
The first movie to be released on Blu-ray with Dolby Atmos was Transformers: Age of Extinction , at least for its original English-language audio presentation. [39] [40] The first video game to use Dolby Atmos was Star Wars: Battlefront with a special agreement between EA and Dolby Laboratories. [41] [42] This game uses HDMI bit streaming from the PC to deliver Atmos audio to consumer Audio-Visual Receivers. Overwatch and Battlefield 1 for PC also have Atmos audio. [43] On the Xbox One, Crackdown 3 and Gears of War 4 support Atmos. [44]
Dolby Atmos for Music, an audio-only iteration of the format was adopted by streaming music services Tidal (uses E-AC3) and Amazon Music in December 2019. [45]
Sennheiser launched a new sound bar with built-in Dolby Atmos technology named AMBEO sound bar at the 2019 CES in Las Vegas. [46] The sound bar utilizes analysis of a room's reflective characteristics to enable a single-unit 5.1.4 setup. [47]
On May 17, 2021, Apple Music announced the addition of spatial audio with support for Dolby Atmos and lossless audio. [48] The feature was introduced to Apple Music users on Apple devices starting from June 7, 2021. [49] Dolby Atmos is now fully supported on Android with Windows support coming in the future. [50]
Streaming services like Netflix, Disney+, Vudu, Apple TV+, Amazon Prime Video and Max stream movies and TV shows in Dolby Atmos. [22]
The application of Atmos in home theatres differs from cinemas primarily because of restricted bandwidth and a shortfall in processing power. A spatially-coded sub-stream is added to Dolby TrueHD or Dolby Digital Plus or is present as metadata in Dolby MAT 2.0, an LPCM-like format. This sub-stream is an efficient representation of the full, original object-based mix. This is not a matrix-encoded channel, but a spatially-encoded digital signal with panning metadata. Atmos in home theaters can support 24.1.10 channels [15] [51] and uses the spatially-encoded object audio sub-stream to mix the audio presentation to match the installed speaker configuration. There are programs from Dolby that handle 128 objects (including 118 dynamic objects and 10 beds) for macOS and Windows. [52]
To reduce the bit rate in Dolby Atmos, nearby objects and speakers are grouped into clusters known as aggregate objects, which are then dynamically panned through a process referred to as spatial coding by Dolby. [53] The audio from the original objects can be distributed across multiple aggregate objects to preserve the original objects' sound power and position. Filmmakers have control over the spatial resolution and the degree of clustering when using the Dolby Atmos Production Suite tools. Additionally, Dolby Digital Plus has been updated to include Atmos extensions. [16]
Dolby Atmos also has headphone implementations for PCs, the Xbox One, the Xbox Series X/S, and mobile phones. They work by using audio processing algorithms to convert the Atmos object metadata into a binaural 360° output using the usual two headphone speakers. This technique is an improvement on the previous Dolby Headphone technology, allowing infinite channels of sound to be processed into a virtual surround experience. [54]
Windows 10 version 1703 ("Creators Update") added platform-level support for spatial sound processing, including Windows Sonic for Headphones and Dolby Atmos for Headphones. [55] Dolby Atmos for headphones requires a license to function which can be purchased or redeemed inside the Dolby Access app. Some branded headphones designed explicitly to deliver better audio quality exist, but users can use their normal headphones or earphones so long as the decoding device uses Atmos, or the audio track itself has been previously downmixed.[ citation needed ]
With the release of third-generation AirPods in October 2021, Apple added support for Dolby Atmos, branded Spatial Audio, to all AirPods (including earlier hardware generations), AirPods Pro, AirPods Max, and most headphones marketed under the Beats brand. [56]
Dolby Atmos has smartphone implementations for devices including but not limited to the iPhone XS/XR and later (when running iOS 13 or later [57] ) and almost all Samsung smartphones and tablets released after the Samsung Galaxy S9. Other smartphones and tablets with Dolby Atmos include the Razer Phone and Razer Phone 2, the ZTE Axon 7, Sony Xperia 1, Lenovo K4 Note, Lenovo Vibe K5 Note, Lenovo K8 Note, Huawei P20, Huawei P30, Poco F3, Realme XT, Realme X2 Pro, Realme 6 Pro, Realme X7 Max, Realme Pad, Nokia 6, OnePlus 7, OnePlus 7T, OnePlus 8 and OnePlus 8T, and Moto G8, Moto G32, and Redmi Note 13 Pro. [58] Implementations in phone use both the binaural headphone technology and the dual loudspeaker virtual surround sound implementation, similar to that used in Dolby Atmos TVs and Soundbars.
NIO ET7 comes standard with Dolby Atmos. On November 16, 2021, NIO announced that Dolby Atmos will be standardized on all NIO ET7s, the smart flagship electric sedan of the company, combined with a 7.1.4 immersive sound system. [59] [60]
Dolby's first implementation of Atmos in an automobile will be the Lucid Air sedan from Lucid Motors. [61]
Dolby Atmos is adaptable and can be played back on various speaker setups. As well, many audio products provide additional support for Dolby Atmos. [62]
The technology has been licensed to other brands by Dolby. Since its launch, the Dolby Atmos format has been used by/affiliated with several companies in consumer technology as well as major film productions. This has added to the overall availability of content for Dolby Atmos' users. [2]
Dolby Digital, originally synonymous with Dolby AC-3, is the name for a family of audio compression technologies developed by Dolby Laboratories. Called Dolby Stereo Digital until 1995, it is lossy compression. The first use of Dolby Digital was to provide digital sound in cinemas from 35 mm film prints. It has since also been used for TV broadcast, radio broadcast via satellite, digital video streaming, DVDs, Blu-ray discs and game consoles.
A head-related transfer function (HRTF) is a response that characterizes how an ear receives a sound from a point in space. As sound strikes the listener, the size and shape of the head, ears, ear canal, density of the head, size and shape of nasal and oral cavities, all transform the sound and affect how it is perceived, boosting some frequencies and attenuating others. Generally speaking, the HRTF boosts frequencies from 2–5 kHz with a primary resonance of +17 dB at 2,700 Hz. But the response curve is more complex than a single bump, affects a broad frequency spectrum, and varies significantly from person to person.
THX Ltd. is an American audio company based in the San Francisco Bay Area. It is known for its eponymous suite of high fidelity audiovisual reproduction standards for movie theaters, screening rooms, home theaters, computer speakers, video game consoles, car audio systems, and video games. The THX trailer that precedes compliant films is based on the Deep Note, with a distinctive glissando up from a rumbling low pitch.
A home cinema, also called a home theater or theater room, is a home entertainment audio-visual system that seeks to reproduce a movie theater experience and mood using consumer electronics-grade video and audio equipment and is set up in a room or backyard of a private home. Some studies show that films are rated better and generate more intense emotions when watched in a movie theater, but convenience is a major appeal for home cinemas. In the 1980s, home cinemas typically consisted of a movie pre-recorded on a LaserDisc or VHS tape; a LaserDisc Player or VCR; and a heavy, bulky large-screen cathode-ray tube TV set, although sometimes CRT projectors were used instead. In the 2000s, technological innovations in sound systems, video player equipment, TV screens and video projectors have changed the equipment used in home cinema set-ups and enabled home users to experience a higher-resolution screen image, improved sound quality and components that offer users more options. The development of Internet-based subscription services means that 2020s-era home theatre users do not have to commute to a video rental store as was common in the 1980s and 1990s.
Surround sound is a technique for enriching the fidelity and depth of sound reproduction by using multiple audio channels from speakers that surround the listener. Its first application was in movie theaters. Prior to surround sound, theater sound systems commonly had three screen channels of sound that played from three loudspeakers located in front of the audience. Surround sound adds one or more channels from loudspeakers to the side or behind the listener that are able to create the sensation of sound coming from any horizontal direction around the listener.
Sennheiser electronic GmbH & Co. KG is a German audio equipment manufacturer headquartered in Wedemark. Sennheiser specializes in equipment for both the consumer and professional audio markets, including microphones, headphones, and loudspeakers.
Nakamichi Corp., Ltd. is a Japanese consumer electronics brand founded in Japan which gained a name from the 1970s onwards for audio cassette decks. Nakamichi is a subsidiary of Chinese holding company Nimble Holdings.
Dolby Pro Logic is a surround sound processing technology developed by Dolby Laboratories, designed to decode soundtracks encoded with Dolby Surround. The terms Dolby Stereo and LtRt are also used to describe soundtracks that are encoded using this technique.
Dolby Laboratories, Inc. is a British-American technology corporation specializing in audio noise reduction, audio encoding/compression, spatial audio, and HDR imaging. Dolby licenses its technologies to consumer electronics manufacturers.
3D audio effects are a group of sound effects that manipulate the sound produced by stereo speakers, surround-sound speakers, speaker-arrays, or headphones. This frequently involves the virtual placement of sound sources anywhere in three-dimensional space, including behind, above or below the listener.
DTS, Inc. is an American company. DTS company makes multichannel audio technologies for film and video. Based in Calabasas, California, the company introduced its DTS technology in 1993 as a competitor to Dolby Laboratories, incorporating DTS in the film Jurassic Park (1993). The DTS product is used in surround sound formats for both commercial/theatrical and consumer-grade applications. It was known as The Digital Experience until 1995. DTS licenses its technologies to consumer electronics manufacturers.
Denon is a Japanese electronics company dealing with audio equipment. The Denon brand came from a merger of Denki Onkyo and others in 1939, but it originally started as Nippon Chikuonki Shoukai in 1910 by Frederick Whitney Horn, an American entrepreneur.
Dolby TrueHD is a lossless, multi-channel audio codec developed by Dolby Laboratories for home video, used principally in Blu-ray Disc and compatible hardware. Dolby TrueHD, along with Dolby Digital Plus (E-AC-3) and Dolby AC-4, is one of the intended successors to the Dolby Digital (AC-3) lossy surround format. Dolby TrueHD competes with DTS's DTS-HD Master Audio, another lossless surround sound codec.
An audio/video receiver (AVR) or a stereo receiver is a consumer electronics component used in a home theater or hi-fi system. Its purpose is to receive audio and video signals from a number of sources, and to process them and provide power amplifiers to drive loudspeakers, and/or route the video to displays such as a television, monitor or video projector. Inputs may come from a TV, FM, or AM tuner, satellite receiver, DVD players, Blu-ray Disc players, VCRs or video game consoles, among others. The AVR source selection and settings such as volume, are typically set by a remote controller.
Foster Denki KK is an electronics company that manufactures loudspeakers and audio equipment for other companies or sells them under the trade name Fostex. It is traded on the Tokyo Stock Exchange.
Dolby Headphone is a technology developed by Lake Technology (Australia), that later sold marketing rights to Dolby Laboratories, sometimes referred to as Mobile Surround, which creates a virtual surround sound environment in real-time using any set of two-channel stereo headphones. It takes as input either a 5.1 or a 7.1 channel signal, a Dolby Pro Logic II encoded 2 channel signal or a stereo 2 channel signal. It sends as output a 2 channel stereo signal that includes audio cues intended to place the input channels in a simulated virtual soundstage.
Beats Electronics LLC is an American consumer audio products manufacturer headquartered in Culver City, California. The company was founded in 2006 by music producer Dr. Dre and record company executive Jimmy Iovine. Since 2014, it has been an Apple subsidiary.
Auro 11.1 is one of the cinematic speaker layouts of the Auro-3D format, invented in 2005 by Wilfried Van Baelen.
Auro-3D is an immersive 3D audio format developed by the Belgium-based company Auro Technologies.
Dolby Cinema is a premium cinema created by Dolby Laboratories that combines Dolby proprietary technologies such as Dolby Vision and Dolby Atmos, as well as other signature entrance and intrinsic design features. The technology competes with IMAX and other premium large formats such as Cinemark XD and Regal's RPX.
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: CS1 maint: numeric names: authors list (link)At CES 2019, held in Las Vegas from January 8 to 11, Sennheiser will be providing visitors with the unique opportunity to explore the world of Augmented Audio and craft their very own AMBEO AR experience.
By capturing the characteristics of your living room and reflective surfaces, and using the latest virtualization technology developed with Fraunhofer, the AMBEO Soundbar merges with the acoustics of your environment to create a 3D sound experience.