发明名称 |
SPEECH CODING APPARATUS, SPEECH DECODING APPARATUS AND METHODS THEREOF |
摘要 |
A speech coding apparatus includes a base layer coder that codes an input signal and generates first coded information. A base layer decoder decodes the first coded information and generates a first decoded signal. The base layer decoder also generates long term prediction information comprising information representing long term correlation of speech or sound. An adder obtains a residual signal representing a difference between the input signal and the first decoded signal. An enhancement layer coder calculates a long term prediction coefficient using the residual signal obtained in the adder and a long term prediction signal fetched from a previous long term prediction signal sequence based on the long term prediction information. The enhancement layer coder further codes the long term prediction coefficient and generates second coded information.
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申请公布号 |
US2008033717(A1) |
申请公布日期 |
2008.02.07 |
申请号 |
US20070872359 |
申请日期 |
2007.10.15 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
SATO KAORU;MORII TOSHIYUKI |
分类号 |
G10L19/00;G10L19/14;G10L19/24 |
主分类号 |
G10L19/00 |
代理机构 |
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地址 |
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