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Gain control method and gain control device for audio data

A technology of audio data and gain control, applied in gain control, amplification control, speech analysis, etc., can solve problems such as reduced recognition performance

Active Publication Date: 2016-02-17
BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in speech recognition services, it is usually required that the amplitude value of the collected audio data is greater than or equal to a certain recognition threshold. Once the amplitude value of the audio data is smaller than the recognition threshold, the recognition performance will be greatly reduced.

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  • Gain control method and gain control device for audio data

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Embodiment Construction

[0079] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0080] It should be noted that the terminals involved in the embodiments of the present invention may include, but are not limited to, mobile phones, personal digital assistants (Personal Digital Assistant, PDA), wireless handheld devices, tablet computers (Tablet Computer), personal computers (Personal Computer, PC), MP3 players Devi...

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Abstract

The invention provides a gain control method and a gain control device for audio data. The method in the embodiment of the invention comprises the following steps: acquiring Nth frame audio data and VAD information of the Nth frame audio data, and acquiring the expected gain of the Nth frame audio data according to an expected amplitude value and the Nth frame audio data; further acquiring the control gain of the Nth frame audio data according to the VAD information of the Nth frame audio data, VAD information of each frame of audio data in adjacent M frame audio data in front of the Nth frame audio data, the expected gain of the Nth frame audio data, and the expected gain of each frame of audio data in adjacent M frame audio data in front of the Nth frame audio data, so that the Nth frame audio data can be subjected to gain control processing by utilizing the control gain. Therefore, the amplitude value of the to-be-identified audio data is controlled to be above an identification threshold, and the voice recognition performance can be effectively prevented from being reduced.

Description

【Technical Field】 [0001] The present invention relates to audio signal processing technology, in particular to a method and device for gain control of audio data. 【Background technique】 [0002] With the development of communication technology, the terminal integrates more and more functions, so that more and more corresponding applications are included in the system function list of the terminal. Some applications involve voice recognition services, such as voice input in WeChat, voice assistants in search applications, etc. [0003] However, in speech recognition services, it is usually required that the amplitude value of the collected audio data be greater than or equal to a certain recognition threshold. Once the amplitude value of the audio data is less than the recognition threshold, the recognition performance will be greatly reduced. Therefore, there is an urgent need to provide a gain control method and device for audio data to control the amplitude value of the audio da...

Claims

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Application Information

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IPC IPC(8): G10L15/20H03G3/20
Inventor 徐杨飞魏建强崔玮玮
Owner BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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