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    • 9. 发明授权
    • Method and system for reduction of quantization-induced block-discontinuities and general purpose audio codec
    • 用于减少量化引起的块不连续性和通用音频编解码器的方法和系统
    • US07181403B2
    • 2007-02-20
    • US11075440
    • 2005-03-09
    • Shuwun WuJohn MantegnaKeren Perlmutter
    • Shuwun WuJohn MantegnaKeren Perlmutter
    • G10L21/00
    • G10L19/00G10L19/0212G10L19/022G10L19/028G10L19/038G10L2019/0012
    • Compressing the digitized time-domain continuous input signal typically includes formatting the input signal into a plurality of time-domain blocks having boundaries, forming an overlapping time-domain block by prepending a fraction of a previous time-domain block to a current time-domain block, transforming each overlapping time-domain block to a transform domain block including a plurality of coefficients, partitioning the coefficients of each transform domain block into signal coefficients and residue coefficients, quantizing the signal coefficients for each transformed domain block and generating signal quantization indices indicative of such quantization, modeling the residue coefficients for each transform domain block as stochastic noise and generating residue quantization indices indicative of such quantization, and formatting the signal quantization indices and the residue quantization indices for each transform domain block as an output bit-stream. The continuous data may include audio data.
    • 压缩数字化时域连续输入信号通常包括将输入信号格式化成具有边界的多个时域块,通过将前一个时域块的一部分预先添加到当前时域来形成重叠的时域块 将每个重叠的时域块变换为包括多个系数的变换域块,将每个变换域块的系数划分为信号系数和残余系数,量化每个变换域块的信号系数,并产生指示的信号量化索引 对每个变换域块的残差系数进行建模,作为随机噪声并产生表示这种量化的残差量化索引,并将每个变换域块的信号量化索引和残余量化索引格式化为输出比特流。 连续数据可以包括音频数据。