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Fundamental frequency information extraction method and device applied to reverberation environment voiceprint recognition

A technology of information extraction and ambient sound, applied in speech analysis, instruments, etc., can solve problems affecting the robustness of the voiceprint recognition system, achieve the effects of speeding up signal processing, simplifying algorithms, and avoiding detection errors

Pending Publication Date: 2022-04-22
北京中电慧声科技有限公司 +1
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Problems solved by technology

But for a computer, the reverberation of the speech signal will directly affect the robustness of the voiceprint recognition system

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  • Fundamental frequency information extraction method and device applied to reverberation environment voiceprint recognition
  • Fundamental frequency information extraction method and device applied to reverberation environment voiceprint recognition
  • Fundamental frequency information extraction method and device applied to reverberation environment voiceprint recognition

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[0044] In order to further explain the technical means and functions adopted by the present invention to achieve the intended purpose, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0045] The description of the method flow in the description of the present invention and the steps of the flow chart in the drawings of the description of the present invention do not have to be strictly executed according to the step numbers, and the execution order of the method steps can be changed. Moreover, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

[0046] Such as figure 1 As shown, the spectrogram of a pure speech is on the left, and the reverberated version of the spectrogram of the same speech is on the right. In the frequency domain, the formant portion of the spectrogram of a reverberant spe...

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Abstract

The invention provides a fundamental frequency information extraction method and device applied to reverberation environment voiceprint recognition. The extraction method comprises the following steps: acquiring reverberation environment voice to be processed; preprocessing the reverberation environment voice; fourier transform is carried out on the preprocessed reverberation environment voice to obtain a frequency domain signal; performing nonlinear amplitude scaling on the frequency domain signal; extracting a base vector from the frequency domain signal after the nonlinear amplitude scaling processing; and calculating fundamental frequency related cepstrum features based on the extracted basis vectors. Compared with a traditional fundamental frequency detection method, the method has the advantages that the algorithm is simplified, the signal processing speed is increased, and real-time voice signal processing is remarkably helped. According to the method, a specific fundamental frequency value is replaced by the fundamental frequency related characteristic value, so that a detection error easily occurring in a traditional fundamental frequency detection method in the reverberation environment is avoided, and the accuracy and the reliability of fundamental frequency information extraction of voiceprint recognition in the reverberation environment are improved.

Description

technical field [0001] The invention relates to the technical field of voiceprint recognition and voice fundamental frequency detection, in particular to a method and device for extracting fundamental frequency information applied to voiceprint recognition in a reverberant environment. Background technique [0002] The formation of reverberation is related to the distance between the speaker and the sound collection device (microphone) and the scene environment. Part of the sound wave of the speaker’s voice will be directly collected by the sound collection device, and the other part will be collected by the sound collection device after being reflected by the surrounding environment (such as walls, furniture), so that the sound signals are partially overlapped in the time domain. Speech reverberation within a certain range can have a certain auxiliary effect on human hearing of sound signals. For example, reverberation can make music produce better sound effects. But for a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L17/02G10L19/02
CPCG10L17/02G10L19/0212
Inventor 陈骁陈龙
Owner 北京中电慧声科技有限公司
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