Audio recording system and method based on screencast

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...

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

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