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Method and apparatus for recording and playing audio-video document

An audio, video and file technology, applied in the multimedia field, can solve the problem of high operating system requirements, and achieve the effects of low operating system requirements, simple encoding and decoding, and less occupancy.

Inactive Publication Date: 2008-11-12
VIMICRO CORP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method and device for recording and playing audio and video files, which is used to solve the problem that the existing method of synchronously playing audio and video files has high requirements on the operating system

Method used

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  • Method and apparatus for recording and playing audio-video document
  • Method and apparatus for recording and playing audio-video document
  • Method and apparatus for recording and playing audio-video document

Examples

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Embodiment Construction

[0036] In view of the above-mentioned deficiencies in the prior art, the embodiments of the present invention propose a method and device for recording and playing audio and video files to ensure synchronous playback of audio and video files, and the encoding and decoding are simple and have low requirements on the operating system. The main implementation principles, specific implementation processes and corresponding beneficial effects of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Audio files are generally collected according to the baud rate, that is to say, during the collection of audio files, the amount of data generated in each fixed period of time is the same, and the interruption time of each DMA (Direct Memory Access, direct memory access) transmission it's the same. According to this principle, the embodiment of the present invention uses the playback speed of the audio file as t...

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Abstract

The invention discloses a method and a device for recording and playing audio and video files. The recording method consists of the following steps: collecting audio data and video data; sequentially saving the audio data and the video data collected in set time length and establishing and sequentially storing corresponding index information; generating the audio and video files according to the saved audio data and the video data and the corresponding index information. The playing method consists of the following steps: reading the index information corresponding to the audio data and the video data in the audio and video files according to a set period; judging whether the corresponding audio and video data is the data collected in the same set time length according to the read index information: if not, regulating the playing speed of the video data so that the audio data and the video data are synchronous. The technical proposal can synchronously play the audio and video files and has the advantages of simple implementation, low demand for the operating system and guarantee of playing effect when switching programs.

Description

technical field [0001] The invention relates to the field of multimedia technology, in particular to a method and device for recording and playing audio and video files. Background technique [0002] Along with the flourishing of electronic industry, PC (Personal Computer, personal computer), PDA (PersonalDigital Assist, personal digital assistant machine), SP (Smart Phone, intelligent mobile phone), electronic dictionary translator and so on can play multimedia files. Digital processing equipment has penetrated into the daily life of the public, bringing people rich digital multimedia leisure and entertainment life. [0003] A general multimedia file is mainly divided into two parts, namely video data and audio data. When the multimedia file is played, the video data and the audio data are respectively decoded and then played. In a playback operation of multimedia files, audio data is played continuously, while video files are played one by one according to a fixed time g...

Claims

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Application Information

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IPC IPC(8): G11B27/10G11B27/02G11B20/10
Inventor 何菊
Owner VIMICRO CORP
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