发明名称 |
Multi-level run length coding for frequency-domain audio coding |
摘要 |
A technique for entropy coding information relating to frequency domain audio coefficients. For portions of a frequency spectrum having a predominate value of zero, a multi-level run length encoder statistically correlates sequences of zero values with non-zero values and assigns variable length code words. An encoder uses a specialized code book generated with respect to the probability of receiving an input sequence of zero-valued spectral coefficients followed by a non-zero coefficient. A corresponding decoder associates a variable length code word with a sequence of zero value coefficients adjacent a non-zero value coefficient.
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申请公布号 |
US6223162(B1) |
申请公布日期 |
2001.04.24 |
申请号 |
US19980211277 |
申请日期 |
1998.12.14 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
CHEN WEI-GE;LEE MING-CHIEH |
分类号 |
H03M7/46;(IPC1-7):G10L19/00 |
主分类号 |
H03M7/46 |
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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