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Audio data gain control method and device

An audio data, gain control technology, applied in gain control, amplification control, speech analysis and other directions, can solve the problem of reduced recognition performance

Active Publication Date: 2016-11-09
BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Audio data gain control method and device

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Embodiment Construction

[0079] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts 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, MP4 players, we...

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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 invention relates to audio signal processing technology, in particular to an audio data gain control method and device. 【Background technique】 [0002] With the development of communication technology, more and more functions are integrated into the terminal, so that more and more corresponding application programs are included in the system function list of the terminal. Some applications will involve speech recognition services, for example, the voice input function in WeChat, the voice assistant in the search application, and so on. [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, and once the amplitude value of the audio data is smaller than the recognition threshold, the recognition performance will be greatly reduced. Therefore, there is an urgent need to provide a method and device for controlling the g...

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Application Information

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Patent Type & Authority Patents(China)
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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