发明名称 |
PARAMETER DECODING DEVICE, PARAMETER ENCODING DEVICE, AND PARAMETER DECODING METHOD |
摘要 |
<p>Provided is a parameter decoding device for CELP encoded speech signals which performs parameter compensation process so as to suppress degradation of a main observation quality in a prediction quantization. The parameter decoding device includes amplifiers (305-1 to 305-M) which multiply inputted quantization prediction residual vectors x n-1 to x n-M by a weighting coefficient ² 1 to ² M . The amplifier (306) multiplies the preceding frame decoding LSF vector y n-1 by the weighting coefficient ² -1 . The amplifier (307) multiplies the code vector x n+1 outputted from a codebook (301) by the weighting coefficient ² 0 . An adder (308) calculates the total of the vectors outputted from the amplifiers (305-1 to 305-M), the amplifier (306), and the amplifier (307). A selector switch (309) selects the vector outputted from the adder (308) if the frame erasure coding B n of the current frame indicates that 'the n-th frame is an erased frame' and the frame erasure coding B n+1 of the next frame indicates that 'the n+1-th frame is a normal frame'.</p> |
申请公布号 |
EP2088588(B1) |
申请公布日期 |
2013.01.09 |
申请号 |
EP20070831534 |
申请日期 |
2007.11.09 |
申请人 |
PANASONIC CORPORATION |
发明人 |
EHARA, HIROYUKI |
分类号 |
G10L19/00;G10L19/005;G10L19/06;G10L19/07;G10L19/08;G10L19/083 |
主分类号 |
G10L19/00 |
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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