发明名称 |
Entropy coding by adapting coding between level and run-length/level modes |
摘要 |
An audio encoder performs adaptive entropy encoding of audio data. For example, an audio encoder switches between variable dimension vector Huffinan coding of direct levels of quantized audio data and run-level coding of run lengths and levels of quantized audio data. The encoder can use, for example, context-based arithmetic coding for coding run lengths and levels. The encoder can determine when to switch between coding modes by counting consecutive coefficients having a predominant value (e.g., zero). An audio decoder performs corresponding adaptive entropy decoding. <IMAGE> |
申请公布号 |
EP1400954(A2) |
申请公布日期 |
2004.03.24 |
申请号 |
EP20030020015 |
申请日期 |
2003.09.03 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
MEHROTRA, SANJEEV;CHEN, WEI-GE |
分类号 |
G10L19/02;H03M7/40;H03M7/46 |
主分类号 |
G10L19/02 |
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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