发明名称 |
MULTI-CHANNEL AUDIO ENCODER AND METHOD FOR ENCODING A MULTI-CHANNEL AUDIO SIGNAL |
摘要 |
The invention relates to a method for determining an encoding parameter for an audio channel signal of a multi-channel audio signal, the method comprising: determining a frequency transform of the audio channel signal; determining a frequency transform of a reference audio signal; determining inter channel differences for at least each frequency sub-band of a subset of frequency sub-bands, each inter channel difference indicating a phase difference or time difference between a band-limited signal portion of the audio channel signal and a band-limited signal portion of the reference audio signal in the respective frequency sub-band the inter-channel difference is associated to; determining a first average based on positive values of the inter-channel differences and determining a second average based on negative values of the inter-channel differences; and determining the encoding parameter based on the first average and on the second average. |
申请公布号 |
US2015049872(A1) |
申请公布日期 |
2015.02.19 |
申请号 |
US201414498613 |
申请日期 |
2014.09.26 |
申请人 |
Huawei Technologies Co., Ltd. |
发明人 |
VIRETTE David;LANG Yue;XU Jianfeng |
分类号 |
G10L19/008 |
主分类号 |
G10L19/008 |
代理机构 |
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代理人 |
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主权项 |
1. A method for determining an encoding parameter for an audio channel signal of a plurality of audio channel signals of a multi-channel audio signal, each audio channel signal having audio channel signal values, the method comprising:
determining a frequency transform of the audio channel signal values of the audio channel signal; determining a frequency transform of reference audio signal values of a reference audio signal, wherein the reference audio signal is another audio channel signal of the plurality of audio channel signals or a downmix audio signal derived from at least two audio channel signals of the plurality of audio channel signals; determining inter channel differences for at least each frequency sub-band of a subset of frequency sub-bands, each inter channel difference indicating a phase difference or time difference between a band-limited signal portion of the audio channel signal and a band-limited signal portion of the reference audio signal in the respective frequency sub-band the inter-channel difference is associated to; determining a first average based on positive values of the inter-channel differences and determining a second average based on negative values of the inter-channel differences; and determining the encoding parameter based on the first average and on the second average. |
地址 |
Shenzhen CN |