Anti channel error code method of line spectrum pair parameter of voice coder
A technology of instrument line spectrum and line spectrum pair, which is applied in the direction of instruments, speech analysis, speech synthesis, etc., can solve the problems of not taking into account the correct reception of bit information in the current frame, the degradation of synthesized voice quality, and the degradation of voice quality, so as to improve Anti-channel error capability and synthesized speech quality, reducing the effect of line spectrum on parametric spectrum distortion, high intelligibility and comfort
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[0017] The vocoder line spectrum pair parameter anti-channel bit error method proposed by the present invention is further described as follows in conjunction with the accompanying drawings and embodiments:
[0018] Method flow process of the present invention as shown in Figure 1, comprises the following steps:
[0019] (1) Frame the input voice signal sample point according to the set time sequence, the voice signal sample point is the signal sample point that has been sampled according to the set frequency and removed the power frequency interference through high-pass filtering;
[0020] (2) According to the linear predictive speech coding algorithm of 2400b / s mixed excitation, extract the vocoder line spectrum pair parameters for the current frame: when multi-frame joint vector quantization, it is necessary to extract the vocoder lines of all frames in the current superframe Spectrum pair parameters; vector quantize the extracted line spectrum pair parameters, and perform ...
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