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APPARATUS AND METHOD FOR DATA COMPRESSION USING SIGNAL- WEIGHTED QUANTIZING BIT ALLOCATION
APPARATUS AND METHOD FOR DATA COMPRESSION USING SIGNAL- WEIGHTED QUANTIZING BIT ALLOCATION
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机译:使用信号加权量化位分配进行数据压缩的设备和方法
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摘要
Apparatus for compressing a digital input signal, to provide a compressed digital output signal, comprises means (11-15) for deriving plural spectral coefficients from the digital input signal, and for grouping the spectral coefficients into bands, and adaptive bit allocation means (16-18) for adaptively allocating a number of signal-dependent quantizing bits among the bands to allocate to each band a number of signal-dependent quantizing bits for quantizing each spectral coefficient in the band, the number of signal-dependent quantizing bits allocated to each band being determined according to the band magnitude, weighted depending on the band frequency. IMAGE
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