发明名称 |
CODING AND DECODING |
摘要 |
The present invention relates to encoding apparatuses which allow encoding to be performed such that the occurrence of pre-echo and post-echo is suppressed. A predetermined waveform analysis is applied to a low-frequency-component input time-sequential signal which includes a high-frequency component occurring at a specific time, and a low-frequency-component time-sequential signal like that shown in <FIGREF IDREF="DRAWINGS">FIG. 9A</FIGREF> is generated according to a result of the analysis. The low-frequency-component time-sequential signal is removed from the input time-sequential signal to generate a residual time-sequential signal like that shown in <FIGREF IDREF="DRAWINGS">FIG. 9B</FIGREF>. An amplitude control process is applied such that the amplitude of the residual time-sequential signal is made almost constant in a block which serves as a unit of encoding to generate a time-sequential signal to be quantized, like that shown in <FIGREF IDREF="DRAWINGS">FIG. 9C</FIGREF>. The time-sequential signal to be quantized is quantized and encoded. The present invention can be applied to audio recording and reproduction apparatuses. |
申请公布号 |
EP1335496(B1) |
申请公布日期 |
2009.06.10 |
申请号 |
EP20010270958 |
申请日期 |
2001.12.14 |
申请人 |
SONY CORPORATION |
发明人 |
TSUJI, MINORU;SUZUKI, SHIRO;TOYAMA, KEISUKE |
分类号 |
G10L19/02;G10L21/02;H03M7/30;H04B1/66;H04B14/04;H04L25/06 |
主分类号 |
G10L19/02 |
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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