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    • 4. 发明申请
    • Compressing signals using serially-concatenated accumulate codes
    • 使用串行级联代码压缩信号
    • US20060048038A1
    • 2006-03-02
    • US10928448
    • 2004-08-27
    • Jonathan YedidiaAnthony VetroAshish KhistiDmitry Malioutov
    • Jonathan YedidiaAnthony VetroAshish KhistiDmitry Malioutov
    • H03M13/03
    • H03M7/30H03M13/00H03M13/03H03M13/1194H03M13/19H03M13/6312
    • A method compresses a set of correlated signals by first converting each signal to a sequence of integers, which are further organized as a set of bit-planes. This can be done by signal transformation and quantization. An inverse accumulator is applied to each bit-plane to produce a bit-plane of shifted bits, which are permuted according to a predetermined permutation to produce bit-planes of permuted bits. Each bit-plane of permuted bits is partitioned into a set of blocks of bits. Syndrome bits are generated for each block of bits according to a rate-adaptive base code. Subsequently, the syndrome bits can be decompressed in a decoder to recover the original correlated signals. For each bit-plane of the corresponding signal, a bit probability estimate is generated. Then, the bit-plane is reconstructed using the syndrome bits and the bit probability estimate. The sequence of integers corresponding to all of the bit-planes can then be reconstructed from the bit probability estimates, and the original signal can be recovered from the sequences of integers using an inverse quantization and inverse transform.
    • 一种方法通过首先将每个信号转换成整数序列来压缩一组相关信号,该整数序列进一步被组织为一组位平面。 这可以通过信号变换和量化来完成。 反向累加器被施加到每个位平面以产生位移位的位平面,它们根据预定的排列被排列以产生置换位的位平面。 置换位的每个位平面被划分成一组位块。 根据速率自适应基本码为每个位块产生综合位。 随后,可以在解码器中解压缩校正子位以恢复原始的相关信号。 对于相应信号的每个位平面,产生位概率估计。 然后,使用校正子位和位概率估计来重构位平面。 然后可以从比特概率估计中重构对应于所有比特平面的整数序列,并且可以使用逆量化和逆变换从整数序列中恢复原始信号。