Hearing perception characteristic-based objective voice quality evaluation method
A speech quality and auditory perception technology, applied in speech analysis, instruments, etc., can solve the problems of not fully reflecting the auditory perception characteristics of the human ear, unfavorable real-time evaluation of speech quality, and large differences in evaluation performance, achieving complex running time and algorithms. The effect of reducing the degree of accuracy, improving the evaluation accuracy, and shortening the running time
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[0021] 1. The original speech and the distorted speech of the system under test are first level adjusted to equalize their intensity to an equivalent energy level; then through the ideal band-pass filter, input filtering is performed on the two signals; finally, the time delay generated by the system under test is compensated by time alignment, and the preprocessing process is completed;
[0022] 2. The preprocessed speech signal and The feature parameters are extracted separately;
[0023] attached figure 2 The specific extraction process of the speech signal feature parameters is shown:
[0024] 3. Perform FFT transformation with Hanning window on the speech signal to obtain the signal spectrum ;
[0025] 4. The pitch of the sound heard by the human ear is not linearly proportional to the frequency of the sound. The Mel frequency scale, which is more in line with the auditory characteristics of the human ear, is used for frequency division. The specific relati...
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