发明名称 |
Method and apparatus for interleaving line spectral information quantization methods in a speech coder |
摘要 |
A method and apparatus for interleaving line spectral information quantization methods in a speech coder includes quantizing line spectral information with two vector quantization techniques, the first technique being a non-moving-average prediction-based technique, and the second technique being a moving-average prediction-based technique. A line spectral information vector is vector quantized with the first technique. Equivalent moving average codevectors for the first technique are computed. A memory of a moving average codebook of codevectors is updated with the equivalent moving average codevectors for a predefined number of frames that were previously processed by the speech coder. A target quantization vector for the second technique is calculated based on the updated moving average codebook memory. The target quantization vector is vector quantized with the second technique to generate a quantized target codevector. The memory of the moving average codebook is updated with the quantized target codevector. Quantized line spectral information vectors are derived from the quantized target codevector. |
申请公布号 |
AU6354600(A) |
申请公布日期 |
2001.02.05 |
申请号 |
AU20000063546 |
申请日期 |
2000.07.19 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
ARASANIPALAI K. ANANTHAPADMANABHAN;SHARATH MANJUNATH |
分类号 |
G10L19/04;G10L19/00;G10L19/06;H03M7/30 |
主分类号 |
G10L19/04 |
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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