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Dolby AC-3 (a backronym for Audio Codec 3, Advanced Codec 3, or Acoustic Coder 3), also known as ATSC A/52 (name of the standard) [18] or simply Dolby Digital (DD), is the common version containing up to six discrete channels of sound. Before 1996 it was marketed as Dolby Surround AC-3, Dolby Stereo Digital, and Dolby SRD. [19]
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]
Dolby TrueHD is a lossless, multi-channel audio codec developed by Dolby Laboratories for home video, used principally in Blu-ray 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 AC-4 is a lossy audio compression format that can contain audio channels and/or audio objects. Dolby Atmos is a suite of technologies for immersive audio having both horizontal and vertical sound placement, using a combination of channel and object-based mixing and delivery. It was first introduced in cinemas with Brave (2012 film). The ...
Dolby Digital Plus, also known as Enhanced AC-3 (and commonly abbreviated as DDP, DD+, E-AC-3 or EC-3), is a digital audio compression scheme developed by Dolby Labs for the transport and storage of multi-channel digital audio. It is a successor to Dolby Digital (AC-3), and has a number of improvements over that codec, including support for a ...
When tested for ATSC 3.0 the bit rates needed for the required audio score was 96 kbit/s for stereo audio, 192 kbit/s for 5.1 channel audio, and 288 kbit/s for 7.1.4 channel audio. [1] However, for 22.2 channel audio, the required bit rate may be as high as 1536 kbit/s. [7] Dolby AC-4 is extensible and audio substreams allow for new features to ...
The MPEG-4 audio coding algorithm family spans the range from low bit rate speech encoding (down to 2 kbit/s) to high-quality audio coding (at 64 kbit/s per channel and higher). AAC offers sampling frequencies between 8 kHz and 96 kHz and any number of channels between 1 and 48.
A Dolby noise-reduction system, or Dolby NR, is one of a series of noise reduction systems developed by Dolby Laboratories for use in analog audio tape recording. [1] The first was Dolby A, a professional broadband noise reduction system for recording studios that was first demonstrated in 1965, but the best-known is Dolby B (introduced in 1968), a sliding band system for the consumer market ...
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