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Acoustic feature extraction method, device, storage medium and terminal device

A technology of acoustic features and extraction methods, which is applied in the field of signal processing, can solve the problem of multi-power consumption of terminal equipment, and achieve the effect of reducing power consumption

Inactive Publication Date: 2019-01-04
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology

However, in the prior art, the extraction process of the Mel-frequency cepstral coefficients will cause more power consumption of the terminal equipment, so it is necessary to optimize the extraction method of the Mel-frequency cepstral coefficients

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  • Acoustic feature extraction method, device, storage medium and terminal device
  • Acoustic feature extraction method, device, storage medium and terminal device
  • Acoustic feature extraction method, device, storage medium and terminal device

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Embodiment Construction

[0025] The technical solution of the present application will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only some structures related to the present application are shown in the drawings but not all structures.

[0026] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the steps as sequential processing, many of the steps may be performed in parallel, concurrently, or simultaneously. Additionally, the order of steps may be rearranged. The process may be terminated when its operations are complete, but may also hav...

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Abstract

The embodiment of the invention provides an acoustic feature extraction method, a device, a storage medium and a terminal device. The method includes acquiring a speech signal to be processed; framingthe speech signal to be processed to obtain continuous speech data blocks in units of frames, wherein, in the speech data blocks of each two adjacent frames, the last data in the speech data block ofthe previous frame and the first data in the speech data block of the next frame are kept continuous in the time domain; carrying out window and Fourier transformation on the speech data block to obtain speech energy spectrum; passing the speech energy spectrum through a Mel filter bank to obtain Mel spectrum data; determining a Mel-spectrum cepstrum coefficient base on that Mel-spectrum spectrumdata. By adopting the technical proposal, the number of times of the algorithm for extracting the Mel frequency cepstrum coefficient for each frame data can be reduced, and the power consumption caused by extracting the acoustic features can be reduced.

Description

technical field [0001] The embodiments of the present application relate to the technical field of signal processing, and in particular to an acoustic feature extraction method, device, storage medium, and terminal equipment. Background technique [0002] With the rapid development of terminal devices, more and more voice functions are applied to terminal devices, such as voiceprint wake-up and voice recognition. The Mel Frequency Cepstrum Coefficient (MFCC, Mel Frequency Cepstrum Coefficient) is an acoustic feature derived based on the human ear's sense of hearing. It is widely used in the field of speech recognition. When performing voiceprint wake-up or speech recognition, it is usually required Mel-frequency cepstral coefficients are extracted as features for speech recognition. However, the extraction process of the Mel-frequency cepstral coefficients in the prior art will cause more power consumption of the terminal device, so it is necessary to optimize the method fo...

Claims

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Application Information

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IPC IPC(8): G10L25/24G10L25/21
CPCG10L25/21G10L25/24
Inventor 陈岩
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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