发明名称 |
Sound encoding apparatus and sound encoding method |
摘要 |
A downsampler 101 converts input data having a sampling rate 2*FH to a sampling rate 2*FL which is lower than the sampling rate 2*FH. A base layer coder 102 encodes the input data having the sampling rate 2*FL in predetermined base frame units. A local decoder 103 decodes a first coded code. An upsampler 104 increases the sampling rate of the decoded signal to 2*FH. A subtractor 106 subtracts the decoded signal from the input signal and regards the subtraction result as a residual signal. A frame divider 107 divides the residual signal into enhancement frames having a shorter time length than that of the base frame. An enhancement layer coder 108 encodes the residual signal divided into the enhancement frames and outputs a second coded code obtained by this coding to a multiplexer 109.
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申请公布号 |
US2005252361(A1) |
申请公布日期 |
2005.11.17 |
申请号 |
US20050526566 |
申请日期 |
2005.03.04 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
OSHIKIRI MASAHIRO |
分类号 |
G10L19/00;G10L11/00;G10L19/02;G10L19/12;G10L19/14;(IPC1-7):G11C5/00;G10H7/00 |
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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