发明名称 |
APPARATUS AND METHOD FOR DATA COMPRESSION USING SIGNAL-WEIGHTED QUANTIZING BIT ALLOCATION |
摘要 |
A data compression apparatus for compressing a digital input signal to provide a compressed digital output signal. In the apparatus, a circuit derives plural spectral coefficients from the digital input signal, and groups the spectral coefficients into bands. An adaptive bit allocation circuit adaptively allocates a number of spectrum-dependent quantizing bits among the bands to allocate to each band a number of spectrum-dependent quantizing bits for quantizing each of the spectral coefficients in the band. The number of spectrum-dependent quantizing bits allocated to each band by the adaptive bi t allocation circuit is determined according to the band magnitude, weighted depending on the band frequency.
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申请公布号 |
CA2088202(C) |
申请公布日期 |
2004.12.28 |
申请号 |
CA19932088202 |
申请日期 |
1993.01.27 |
申请人 |
SONY CORPORATION |
发明人 |
TSUTSUI, KYOYA;AKAGIRI, KENZO |
分类号 |
H03H17/02;G11B20/00;G11B20/10;H03M7/30;H04B1/66;(IPC1-7):H03M7/30;G10L9/18 |
主分类号 |
H03H17/02 |
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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