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Speech signal processing device and speech signal processing method

A voice signal processing and voice signal technology, which is applied in voice analysis, instruments, etc., can solve the problems of lowering the sound quality of the output voice signal and reducing the loudness gap, and achieve the effect of improving the sound quality

Active Publication Date: 2020-12-22
ACER INC
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Problems solved by technology

Although this processing method can avoid the loudness of the output voice signal from being too large, it may reduce the loudness gap between the voice signals of each frequency band, and reduce the sound quality of the output voice signal obtained by synthesizing the voice signals of each frequency band

Method used

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  • Speech signal processing device and speech signal processing method
  • Speech signal processing device and speech signal processing method
  • Speech signal processing device and speech signal processing method

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Embodiment Construction

[0038] figure 1 is a schematic diagram of a speech signal processing device according to an embodiment of the present invention, please refer to figure 1 . The speech signal processing device includes a filtering unit 102 and a processing unit 104, the filtering unit 102 is coupled to the processing unit 104, wherein the filtering unit 102 can be implemented as a bandpass filter, and the processing unit 104 can be implemented as a central processing unit, for example, However, it is not limited to this.

[0039] The filtering unit 102 is used for filtering the input voice signal SI1 to generate a plurality of filtered signals SF1 - SFN of different frequency bands to the processing unit 104 , wherein N is a positive integer greater than 1. The processing unit 104 can detect the loudness of the detected filter signals SF1 - SFN to obtain a plurality of filter loudness, and calculate the filter loudness gain of each frequency band according to each filter loudness and the wide...

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Abstract

The invention provides a voice signal processing device and a voice signal processing method. According to the invention, the filtering loudness gain of a filtering signal of each frequency band is adjusted according to a wide dynamic range compression curve without an output loudness upper limit. Therefore, the filtering loudness gain of each frequency band is reduced through reducing a gain decrease adjustment value, so that the loudness of a loudness adjustment filtering signal is reduced. As a result, the loudness of an outputted voice signal is lower than a first threshold value. By meansof the voice signal processing device and the voice signal processing method, the sound quality of outputted voice signals can be greatly improved.

Description

technical field [0001] The invention relates to a signal processing device, and in particular to a voice signal processing device and a voice signal processing method. Background technique [0002] Multi-band Wide Dynamic Range Compression (WDRC) technology is widely used in the range of hearing aids. The main function of wide dynamic range compression is to increase the loudness gain of speech signals with low loudness for easy identification and reduce the loudness Loudness gain of the speech signal to avoid discomfort caused by too loud sound. In addition, in order to prevent the loudness of the output voice signal from exceeding the range that the human ear can bear, it must be limited within a certain range of loudness to protect the ear from hearing damage. [0003] Generally speaking, multi-band wide dynamic range compression means that each frequency band independently processes speech signals, and the wide dynamic range compression curves of each frequency band are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/02G10L19/26G10L21/003
CPCG10L19/0204G10L19/26G10L21/003
Inventor 杜博仁张嘉仁曾凯盟
Owner ACER INC
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