Showing posts with label PCM. Show all posts
Showing posts with label PCM. Show all posts

Wednesday, May 07, 2008

Knowledge Base about PCM and Waveaudio

Knowledge Base about PCM and Waveaudio:
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Wave file is having 45 bytes of audio Header info. and rest of the things are audio data;
In case of PCM samples,
Each and every audio sample is having 20 ms of data; 20 ms of data will be represented in 320 bytes;
So Every PCM sample is having 320 bytes of data;



Find out if the PCM audio source is giving 8000 bytes of data, then Howmany milliseconds of data PCM audio source is giving;

PCM Audio Source(PC camera's Mic) is giving 8000 bytes of data at a time;8000 bytes of data means,

8000/320 ( for a single audio frame) = 25 audio frames at a time;

Each audio frame represents 20 ms of audio data;

25 frames* 20 ms = 500 ms;

The Audio soucre is giving 500 ms of data at a time;