Method, device and storage medium for processing audio signals
An audio signal and signal technology, applied in the field of signal processing, can solve problems such as low naturalness
Active Publication Date: 2021-05-07
GUANGZHOU KUGOU COMP TECH CO LTD
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[0006] The invention provides a method, device and storage medium for processing audio signals, which can solve the problem of low naturalness
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[0063] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0064] In the embodiment of the present invention, processing an audio signal refers to performing modulation and speed-changing processing on the audio signal. Wherein, the process of transposing without changing the speed refers to only changing the pitch of the audio signal without changing the timbre of the audio signal. The pitch is represented by the excitation spectrum of the audio signal, while the timbre is represented by the spectral envelope of the audio signal. Therefore, when processing an audio signal, only the excitation spectrum of the audio signal needs to be changed, and the spectrum envelope of the spectrum signal does not need to be changed.
[0065] The method for processing an audio signal can be applied to a spe...
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The invention discloses a method, device and storage medium for processing audio signals, belonging to the field of signal processing. The method includes: performing tone transposition processing on the first audio signal to be processed to obtain a second audio signal; extracting a first spectrum envelope and an excitation spectrum from the second audio signal, the first spectrum envelope corresponds to the timbre of the audio signal, and the excitation spectrum corresponds to The pitch of the audio signal; restoring the first spectrum envelope to obtain the second spectrum envelope; generating the third audio signal according to the second spectrum envelope and the excitation spectrum. Since the excitation spectrum and the first spectrum envelope are separated from the second audio signal obtained by performing modulation on the first audio signal, the excitation spectrum and the first spectrum envelope are corresponding in the time domain, and the first spectrum The restoration process of the envelope does not change the time domain of the spectrum envelope, so it will not affect the naturalness of the third spectrum signal generated based on the excitation spectrum and the second spectrum envelope, thereby improving the naturalness of the generated third audio signal .
Description
technical field [0001] The present invention relates to the field of signal processing, in particular to a method, device and storage medium for processing audio signals. Background technique [0002] With the development of terminal technology, the terminal can not only record audio signals, but also process the recorded audio signals. For example, the audio signal is processed without changing the pitch without changing the speed. Wherein, the process of transposing the pitch without changing the speed refers to changing the pitch of the audio signal without changing the timbre of the audio signal. [0003] In the prior art, the process for the terminal to transpose the first audio signal to be processed without changing the speed is as follows: the terminal extracts the spectrum envelope of the first audio signal from the first audio signal, and the spectrum envelope corresponds to the tone and timbre of the audio signal. The terminal extracts the first excitation spect...
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IPC IPC(8): G10L21/007H04M1/72433
CPCG10L21/007H04M1/72433
Inventor 肖纯智
Owner GUANGZHOU KUGOU COMP TECH CO LTD