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Audio recording system and method based on screencast

An audio and screen technology, applied in the field of audio digital signal processing, can solve problems such as the degradation of playback sound quality

Inactive Publication Date: 2014-11-19
浙江航天长峰科技发展有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional screen recording software, the playback sound of the computer application software can be captured and recorded by the microphone that is turned on at the same time, but this method will lead to a decrease in the sound quality of the software playback sound, so usually the recording playback sound needs to use the intercepting speaker provided by the computer operating system Data interface function to record

Method used

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  • Audio recording system and method based on screencast
  • Audio recording system and method based on screencast

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Experimental program
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Embodiment Construction

[0038] Such as image 3 As shown, an audio recording system based on screen recording includes the following modules:

[0039] Speaker data interception module 1: intercept the audio data played by the speaker of the device;

[0040] Microphone data collection module 2: collect audio data obtained by the microphone of the device;

[0041] Sampling rate conversion module 3: perform sampling rate conversion on the audio signal intercepted by the loudspeaker data interception module 1;

[0042] Acoustic echo cancellation module 4: performing acoustic echo cancellation on the audio signal collected by the microphone data acquisition module 2;

[0043] Mixing module 5: Mixing the speaker audio signal after sampling rate conversion and the microphone audio signal after acoustic echo cancellation;

[0044] Audio encoding module 6: encode the audio data mixed by the audio mixing module 5 to generate a recorded audio code stream.

[0045] Using the recording method of the above-men...

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PUM

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Abstract

The invention discloses an audio recording system and method based on screencast, and belongs to the technical field of computer multimedia. The audio recording system comprises a loudspeaker data intercept module, a microphone data acquisition module, a sampling rate conversion module, an acoustic echo cancellation module, an audio mixing module and an audio coding module. The method comprises the following steps: firstly, performing sampling rate conversion on audio signals intercepted by the loudspeaker data intercept module respectively; secondly, performing acoustics echo cancellation on the audio signals acquired by the microphone data acquisition module; thirdly, carrying out an audio mixing process on the two kinds of sounds to generate recorded audio frequency. The benefits of the treatment are as follows: the audio frequency does not need to be edited and made in a later period, and a record for the interior and the exterior of a computer (application software broadcasting sounds and external background sounds) can be generated directly.

Description

technical field [0001] The invention relates to an audio recording system and method based on screen recording, which belongs to the technical field of computer multimedia, and in particular relates to audio digital signal processing technology. Background technique [0002] Computer screen recording (Screencasting) is an emerging technology, which is often used in the fields of education and monitoring. It can effectively demonstrate the user's operation on the computer or the operation of the application software on the computer. With the popularity of smart devices, this technology has also penetrated into the screen recording of laptops, tablets, netbooks, and smartphones. Computer screen recording mainly compiles the screen image into a video stream, and can add a synchronized audio stream at the same time. The audio can be the user's voice, the background environment sound, or the playing sound of the application software on the computer. Traditional screen recording...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/02G11C7/16
Inventor 陆成刚俞珊珊黄蒙洪榛杜焕强田茂利
Owner 浙江航天长峰科技发展有限公司
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