发明名称 |
STEREO SIGNAL DOWN-MIXING METHOD, ENCODING/DECODING APPARATUS AND ENCODING AND DECODING SYSTEM |
摘要 |
Embodiments of the present invention provide a stereo signal down-mixing method, encoding/decoding apparatus and system. The down-mixing method includes: converting a first channel time-domain signal and a second channel time-domain signal into a first channel frequency-domain signal and a second channel frequency-domain signal; obtaining a frequency-domain channel signal level difference and a frequency-domain channel signal phase difference between the two channel frequency-domain signals; for each frequency bin in each frequency band, using a function based on the frequency-domain channel signal level difference and frequency-domain channel signal phase difference to obtain a down-mixed signal phase that is located between phases of the two channel frequency-domain signals, and obtaining a down-mixed signal amplitude through calculation; and obtaining a frequency-domain down-mixed signal according to the phase and amplitude.
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申请公布号 |
US2012308018(A1) |
申请公布日期 |
2012.12.06 |
申请号 |
US201213584579 |
申请日期 |
2012.08.13 |
申请人 |
MIAO LEI;WU WENHAI;LANG YUE;HUAWEI TECHNOLOGIES CO., LTD. |
发明人 |
MIAO LEI;WU WENHAI;LANG YUE |
分类号 |
H04R5/00;G10L19/00;G10L19/008;G10L25/18 |
主分类号 |
H04R5/00 |
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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