发明名称 |
MULTI-STAGE VECTOR QUANTIZATION APPARATUS AND METHOD FOR SPEECH ENCODING |
摘要 |
A CELP speech coder/decoder capable of accepting a quantization algorithm in a quantizing section using a multi-stage predictive vector quantization method. The vector quantization of a target is carried out in the multistage predictive vector quantization. The target is obtained and is further vector-quantized. A vector of a first target vector is predicted by a predicting section. The searching section carries out the decoding of the vector using decoded vectors from vector codebooks based on the codes for codevector A and codevector B. The amplitude is obtained from the amplifer storing section and past-decoded vectors stored in the state storing section. The apparatus and method reduce the coded distortion. The apparatus may be employed in speech coding and/or decoding for music, images, or in cellular phones.
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申请公布号 |
CA2598870(C) |
申请公布日期 |
2012.03.27 |
申请号 |
CA19982598870 |
申请日期 |
1998.10.22 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YASUNAGA, KAZUTOSHI;MORII, TOSHIYUKI |
分类号 |
G10L19/12;H03M7/00 |
主分类号 |
G10L19/12 |
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