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Method and device for voice quality assessment

A voice quality and quality assessment technology, applied in speech analysis, speech recognition, instruments, etc., can solve the problem of low accuracy of voice quality assessment

Active Publication Date: 2016-12-07
HUAWEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a method and device for voice quality assessment to solve the problem of low accuracy of voice quality assessment

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  • Method and device for voice quality assessment
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  • Method and device for voice quality assessment

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Embodiment 3

[0087] Next, Embodiment 3 of the present invention will be described, wherein the sampling rate of the speech signal is 16KHz.

[0088] For a speech signal with a sampling rate of 16kHz, a filter bank with 30 subbands can be defined in step S72. Therefore, the input signal can be separated into 30 sub-band signals, and N=30 at this time. N can be changed according to needs, for example, to process the signal more finely without considering the complexity, or design a human ear filter bank with N being 60. Therefore, choosing N to be 30 here is only an example, and is a preferred value in the embodiment of the present invention.

[0089] For the subband signal s of the kth subband k (n), calculate its corresponding time-domain envelope, and obtain the corresponding first signal:

[0090] (Formula 1)

[0091] in, for s k Hilbert transform of (n).

[0092] Figure 9A to Figure 9B Respectively, a speech signal in the 8th sub-band signal and the waveform diagram of the c...

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Abstract

The method for voice quality assessment includes: performing human auditory modeling processing on the voice signal to obtain a first signal; performing time-frequency analysis with variable resolution on the first signal to obtain a second signal; performing feature extraction based on the second signal and analysis to obtain the result of the speech quality evaluation for the speech signal. Through the above technical solution, the problem of low accuracy of voice quality assessment can be solved. Through the human auditory modeling process, the signal to be tested is transformed into a time-frequency signal representing variable resolution, and further analysis can be performed. Time-frequency signal with variable resolution, extract the corresponding features of the signal, do further analysis, and finally obtain the result of speech quality evaluation with higher accuracy.

Description

technical field [0001] The present invention relates to the field of audio technology, more particularly to a method and device for voice quality assessment. Background technique [0002] In the field of audio technology research, subjective testing is an important link. In accordance with industry guidelines (for example: ITU-TP.800), a series of audio sequences are tested by organizing several testers; finally, the average trend of the testers' quality is generally expressed as MOS (Mean Opinion in English) Score), the high or low score reflects the good or bad of the relevant audio technology. [0003] However, the subjective test has the disadvantages of long experimental cycle and high economic cost; in the middle stage of an audio algorithm research, it is unrealistic to organize a large number of subjective tests. Therefore, the significance of studying objective testing tools becomes very obvious. From a methodological point of view, objective testing tools abstra...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L25/69G10L15/02G10L15/06G10L21/0224
CPCG10L25/69G10L25/60G10L17/04G10L21/02
Inventor 肖玮
Owner HUAWEI TECH CO LTD