发明名称 |
Verfahren und Vorrichtung für die perzeptuelle Tonkodierung von einem mehrkanal Tonsignal mit Verwendung der kaskadierten diskreten Cosinustransformation oder der modifizierten diskreten Cosinustransformation |
摘要 |
A method and apparatus for coding audio signals having M sound channels in order to reduce the amount of audio data for transmission or storage. A comparison device is used to compare the coding efficiency in intra-channel signal redundancy reduction and the coding efficiency in inter-channel signal redundancy reduction in order to select a more efficient coding process. In particular, the modified discrete cosine transform (MDCT) process is used to compute the intra-channel coding efficiency and the cascade discrete cosine transform of the MDCT coefficients is used to compute the inter-channel coding efficiency. The efficiencies can be evaluated by computing a gain or the cross-channel correlation coefficients in the audio signals of the M sound channels. <IMAGE> |
申请公布号 |
DE60132853(D1) |
申请公布日期 |
2008.04.03 |
申请号 |
DE2001632853 |
申请日期 |
2001.06.14 |
申请人 |
NOKIA SIEMENS NETWORKS OY |
发明人 |
WANG, YE |
分类号 |
G10L19/00;G10L19/02;H04H20/88 |
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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