The present invention relates to multi channel audio coding and transmission, and in particular to {HEAD ~ techniques} to encode {TAIL ~ multi channel audio} in a manner that is fully backwards compatible with stereo devices and formats, allowing for an efficient coding of multi channel audio 
The present invention relates to multi channel audio coding and transmission , and in particular to { HEAD ~ techniques } to encode { TAIL ~ multi channel audio } in a manner that is fully backwards compatible with stereo devices and formats , allowing for an efficient coding of multi channel audio
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