发明名称 |
Audio decoding |
摘要 |
An audio decoder comprises a receiver (801) for receiving input data comprising an N-channel signal corresponding to a down-mixed signal of an M-channel audio signal, M>N, having complex valued subband encoding matrices applied in frequency subbands and parametric multi-channel data. A subband filter bank (805) generates real-valued frequency subbands for the N-channel signal. A matrix processor (809) determines real-valued subband decoding matrices for compensating the application of the encoding matrices in response to the parametric multi-channel data. A compensation processor (807) generates down-mix data corresponding to the down-mixed signal by a matrix multiplication of the real-valued subband decoding matrices and data of the N-channel signal in the at least some real-valued frequency subbands. The down-mix data can be used to regenerate the down-mixed signal and the M-channel audio signal. The decoder may compensate for MPEG Matrix Surround Compatibility operations performed at the encoder using real-valued frequency subbands.
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申请公布号 |
US8433583(B2) |
申请公布日期 |
2013.04.30 |
申请号 |
US20070294255 |
申请日期 |
2007.03.23 |
申请人 |
VILLEMOES LARS;SCHUIJERS ERIK;KONINKLIJKE PHILIPS INTERNATIONAL N.V.;DOLBY SWEDEN AB |
发明人 |
VILLEMOES LARS;SCHUIJERS ERIK |
分类号 |
G10L19/00;G10L19/008;G10L19/02;G10L25/18 |
主分类号 |
G10L19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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