发明名称 |
SOUND ENCODING APPARATUS AND METHOD, AND SOUND DECODING APPARATUS AND METHOD |
摘要 |
A plurality of sets of position code books indicating the pulse position are provided in a multi-set position code book storing circuit (450). In accordance with a pitch prediction signal obtained in an adaptive code book circuit (500), one type of position code book is selected from the plurality of position code books in a position code book circuit (510). From the selected position code book, a position is selected by a sound source quantization circuit (350) so as to minimize distortion of a sound signal. An output of the adaptive code book circuit (500) and an output of the sound source quantization circuit (350) are transferred. Thus, a sound signal can be encoded while suppressing deterioration of the sound quality with a small amount of calculations even when the encoding bit rate is low. |
申请公布号 |
WO02071394(A1) |
申请公布日期 |
2002.09.12 |
申请号 |
WO2002JP02119 |
申请日期 |
2002.03.07 |
申请人 |
NEC CORPORATION;OZAWA, KAZUNORI |
发明人 |
OZAWA, KAZUNORI |
分类号 |
G10L19/04;H03M7/30;(IPC1-7):G10L19/00;G10L19/12 |
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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