Patent ID: 7937272
Filing Date: 2011-05-03
Classification: G10L

Abstract:
1. A decoder for generating a multi-channel audio signal from a scalable audio bit-stream, the decoder comprising: means for receiving the scalable audio bit-stream comprising a first waveform based bit-stream component, a second bit-stream component comprising first multi channel extension data and a third bit-stream component comprising second alternative multi channel extension data, the first waveform based bit-stream component and the second bit-stream component corresponding to a first representation of the multi channel audio signal and the first waveform based bit-stream component and the third bit-stream component corresponding to a second representation of the multi channel audio signal; a first waveform decoder for generating a first decoded signal for at least a first channel of the multi channel audio signal by decoding the first waveform based bit-stream component; and at least one of: a second decoder for generating the multi channel audio signal by modifying the first decoded signal in response to the second bit-stream component, and a third decoder for generating the multi channel audio signal by modifying the first decoded signal in response to the third bit-stream component.