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Pitch determination algorithm is a critical part in speech coding algorithm. However, in telephone quality speech, the fundamental frequency is often weak, or even missing, which affects the performance of the pitch determination algorithms significantly. Thus in this paper, a robust time-domain pitch determination algorithm is proposed to specifically tackle this problem. It restores the weak or...
The line spectrum frequencies (LSFs) are significant parameters which characterize the spectrum of the speech. The differential quantization of LSFs has been proven to provide better performance which exploits the intraframe correlation between adjacent LSFs, and the delayed decision coding of LSF differences (LSFDs) has been developed to obtain globally optimal quantization. In this paper, we improve...
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