Not to be confused with MPEG Surround or MP3 Surround.
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MPEG Multichannel, also known as MPEG-2 Backwards Compatible, or MPEG-2 BC, is an extension to the MPEG-1 Layer II audio compression specification, as defined in the MPEG-2 Audio standard (ISO/IEC 13818-3)[1][2] which allows it provide up to 5.1-channels (surround sound) of audio.[3][4][5][6] To maintain backwards compatibility with the older 2-channel (stereo) audio specification, it uses a channel matrixing scheme, where the additional channels are mixed into the two backwards compatible channels. Extra information in the data stream (ignored by older hardware) contains signals to process extra channels from the matrix.[5]
^"ISO/IEC 13818-3:1998 - Information technology -- Generic coding of moving pictures and associated audio information -- Part 3: Audio". ISO. Retrieved 2009-10-31.
^Chiariglione, Leonardo (November 6, 1992). "MPEG Press Release, London, 6 November 1992". ISO/IEC. Archived from the original on 8 November 2007. Retrieved 2008-04-03. {{cite journal}}: Cite journal requires |journal= (help)
^Thom, D.; Purnhagen, H.; MPEG Audio Subgroup (October 1998). "MPEG Audio FAQ Version 9, MPEG-1 and MPEG-2 BC". Archived from the original on 2009-11-09. Retrieved 2009-10-31.
^ abOomen, Werner; van de Kerkhof, Leon (April 2006). "MPEG-2 Audio Layer I/II". ISO/IEC. Archived from the original on Apr 30, 2010. Retrieved 2008-04-03.
^Thom, D.; Purnhagen, H.; MPEG Audio Subgroup (October 1998). "MPEG Audio FAQ Version 9 - MPEG Audio". Archived from the original on Nov 1, 2009. Retrieved 2009-10-31.{{cite web}}: CS1 maint: unfit URL (link)
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