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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.
DTS-HD Master Audio (DTS-HD MA; known as DTS++ before 2004 [1]) is a multi-channel, lossless audio codec developed by DTS as an extension of the lossy DTS Coherent Acoustics codec (DTS CA; usually itself referred to as just DTS). Rather than being an entirely new coding mechanism, DTS-HD MA encodes an audio master in lossy DTS first, then ...
Dolby TrueHD: Offers bit-for-bit sound reproduction identical to the studio master. Over seven full-range 24-bit/96 kHz discrete channels are supported (plus an LFE channel, making it 7.1 surround) along with the HDMI interface. Theoretically, Dolby TrueHD can support more channels, but this number has been limited to 8 for HD DVD and Blu-ray Disc.
7.1 channel surround is another setup, most commonly used in large cinemas, that is compatible with 5.1 surround, though it is not stated in the ITU-standards. 7.1 channel surround adds two additional channels, center-left (CL) and center-right (CR) to the 5.1 surround setup, with the speakers situated 15 degrees off centre from the listener. [24]
A virtual surround system must provide a means for 2-dimensional imaging of sound, using some properties of the human auditory system. The way that the auditory system localises a sound source is a topic that is studied in the field of psychoacoustics. Thus, virtual surround systems use knowledge of psychoacoustics to "trick" the listener ...
The installer for Version 1.91, released 18 days later, included wave, cdda, and Windows tray handling plugins, as well as the famous Wesley Willis-inspired DEMO.MP3 file "Winamp, it really whips the llama's ass". [65] [66] Mike the Llama is the company mascot. [54] By July 1998, Winamp's various versions had been downloaded over three million ...
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The MPEG Surround standard was developed by the Moving Picture Experts Group (ISO/IEC JTC 1/SC29/WG11) and published as ISO/IEC 23003 in 2007. [1] It was the first standard of MPEG-D standards group, formally known as ISO/IEC 23003 - MPEG audio technologies. MPEG Surround was also defined as one of the MPEG-4 Audio Object Types in 2007. [8]