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    • 3. 发明授权
    • Coding and decoding of source signals using constrained relative entropy quantization
    • 使用约束相对熵量化对源信号进行编码和解码
    • US08750374B2
    • 2014-06-10
    • US13497237
    • 2010-09-20
    • W. Bastiaan KleijnMinyue Li
    • W. Bastiaan KleijnMinyue Li
    • H04N7/12
    • G10L19/00
    • Methods and devices for encoding and decoding are provided. A source signal value is encoded by a quantization index determined using a partition into quantization cells. Decoding of the quantization index takes place by sampling a reconstruction probability distribution, thereby obtaining a reconstructed signal value, such that the reconstructed signal value lies in the same quantization cell as the source signal value. In one embodiment, encoding and decoding are such that their succession preserves the source signal distribution. In another embodiment, the partition and the reconstruction probability distribution are determined in such manner that the quantization error is minimized subject to a constraint on the relative entropy between the source signal and the reconstructed signal.
    • 提供了用于编码和解码的方法和装置。 源信号值由使用分区确定的量化单元的量化索引进行编码。 通过对重建概率分布进行采样来进行量化索引的解码,从而获得重构信号值,使得重构信号值位于与源信号值相同的量化单元中。 在一个实施例中,编码和解码使得它们的继承保持源信号分布。 在另一个实施例中,以这样的方式确定分区和重构概率分布,使得在对源信号和重构信号之间的相对熵的约束下,量化误差被最小化。