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PCM vs ADPCM

 
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Jeffrey Kafer
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PostPosted: Mon May 12, 2008 2:52 pm    Post subject: PCM vs ADPCM Reply with quote
Can someone give me the difference between PCM and ADPCM when saving wave files? Audition warns me that ADPCM is a lossy compression, but I get no such warning when using PCM.

Frank?
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Last edited by Jeffrey Kafer on Mon May 12, 2008 3:06 pm; edited 1 time in total
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bobsouer
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PostPosted: Mon May 12, 2008 2:55 pm    Post subject: Reply with quote
Jeff,

I'm not Frank, but I do know that ADPCM is a lossy compression scheme. PCM just means pulse code modulation. WAV and AIFF are two popular PCM formats.
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Bob Souer (just think of lemons)
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Jeffrey Kafer
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PostPosted: Mon May 12, 2008 3:02 pm    Post subject: Reply with quote
So then it would be fair to say that not ALL .wav files are uncompressed?
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bobsouer
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PostPosted: Mon May 12, 2008 3:44 pm    Post subject: Reply with quote
Jeffrey,

Correct, though you find very few that use the ADPCM compression scheme, relatively speaking.
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Bob Souer (just think of lemons)
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Jeffrey Kafer
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PostPosted: Mon May 12, 2008 3:50 pm    Post subject: Reply with quote
I'll just stick with PCM. Thanks, Bob.
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Frank F
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PostPosted: Mon May 12, 2008 3:50 pm    Post subject: Reply with quote
Well, let me be Frank with you... what Bob said in both cases is correct.

ADPCM is often used in telephone systems due to the compressed format.

Toodles

Frank F
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