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Quantization noise spectral shaping in instantaneous coding of spectrally unbalanced speech signals
Speech Coding, 2002, IEEE Workshop Proceedings.
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In the context of centralized spectral equalization of speech in a telephone network, the signal is spectrally strongly unbalanced at the output of the equalizer, before being quantized, which results in low SNR at the reception. We propose and evaluate experimentally two methods to reshape the quantization noise, in order to make it less perceptible in reception. The first one consists in finding the most probable quantization sequence, given the desired noise spectrum. In the second one, the
doi:10.1109/scw.2002.1215722
fatcat:o5elvq3u5za2rkp7y7rmebykiu