Speech signal processing device and speech signal processing method

A speech signal processing and speech signal technology, applied in speech analysis, instruments, etc., can solve the problems of signal distortion and will not be considered, and achieve the effect of improving the signal distortion situation

Active Publication Date: 2019-08-06
ACER INC
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, because the existing technology does not consider whether the phases of the signal frame are overlapped, a part of the signal will be added and a part of the signal will be subtracted at the overlap, which will cause signal distortion

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

[0037] figure 1 For a schematic diagram showing 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 processing unit 102 and a sampling unit 104, the processing unit 102 is coupled to the sampling unit 104, wherein the processing unit 102 can be implemented as a central processing unit, and the sampling unit 104 can be implemented as a logic circuit, otherwise This is the limit. The sampling unit 104 can sample the original speech signal S1 to generate a sampled speech signal S2. The processing unit 102 may down-sample the speech signal S2 to generate a down-converted signal comprising a sequence of down-converted signal frames, such as figure 2 As shown in the signal processing schematic diagram of the sampled speech signal S2, the sampled speech signal S2 may include a sequence of sampled signal frames. To simplify the description, in figure 2 In the embodiment, o...

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Abstract

The present invention provides a voice signal processing device and a voice signal processing method. The method comprises the steps: determining a last sampling point, in phase matching with a sampling point corresponding to a phase reference sampling point serial number, in an m-th original frequency reduction signal frame according to a phase reference sampling point serial number, corresponding to a central sampling point in an m-th updated frequency reduction signal frame, in the m-th original frequency reduction signal frame; and taking the continuous p sampling points from the last sampling point as the sampling points of an (m+1) updated frequency reduction signal frame. The method effectively improves the signal distortion caused by the mismatching phase during signal frame overlapping.

Description

technical field [0001] The invention relates to a signal processing device, in particular to a voice signal processing device and a voice signal processing method. Background technique [0002] Generally, hearing-impaired people often cannot clearly receive higher-frequency speech signals, such as consonant signals, but can clearly hear low-frequency signals. Generally, the prior art solves this problem by reducing the frequency of the high-frequency voice signal and overlapping the signal frames. However, because the prior art does not consider whether the phases of the signal frames are matched or not when overlapping the signal frames, a part of the signals will be added and a part of the signals will be subtracted at the overlap, which will result in signal distortion. Contents of the invention [0003] The invention provides a speech signal processing device and a speech signal processing method, which can effectively improve signal distortion caused by phase mismatc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0232
Inventor 杜博仁张嘉仁曾凯盟
Owner ACER INC
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