AES55-2007, AES standard for digital audio engineering - Carriage of MPEG Surround in an AES3 bitstream, has been published 2008-03-18. MPEG Surround is an ISO/IEC standard to extend mono or stereo audio towards multiple channels. The mono or stereo audio channels represent a downmix of the original multi-channel audio that is generated by the MPEG Surround encoder. In addition the MPEG Surround encoder generates spatial side information (MPEG Surround data). An MPEG Surround decoder is able to combine this information with the downmix to result in a multichannel audio signal. In this way backward compatibility to mono and stereo systems is achieved. This standard specifies how MPEG Surround shall be carried within an AES3 bitstream where the downmix channels remain in the linear PCM domain and the MPEG Surround data is encoded into the least-significant bits of the PCM audio data.
http://www.aes.org/publications/standards/search.cfm?docID=60
Posted: Tuesday, March 18, 2008
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