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Mp3 decoding, in theory, always the same?
JJZolx
post Apr 15 2007, 23:58
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Obviously there are differences in mp3 encoders - the algorithms and settings used to produce a file. But for a given mp3 file, should it decode to exactly one WAV file, or can there also be differences in the decoding?
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AndyH-ha
post Apr 16 2007, 01:12
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Some decoders are not written properly and some don't implement the entire standard, thus not all will not give the same results with all mp3 files. There has particularly been a lack in many portable mp3 players. Many are restricted to a limited range of bitrates and sometimes will only handle CBR files.
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2Bdecided
post Apr 16 2007, 01:38
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Even in "compliant" decoders, there is different rounding at the least significant bit level, and sometimes dither.

http://mp3decoders.mp3-tech.org/

Cheers,
David.
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SebastianG
post Apr 16 2007, 09:48
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Also, some decoders might sacrifice accuracy for a gain of speed by using less precision during the synthesis filterbank.
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Donunus
post Apr 16 2007, 12:46
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How is the ipod's decoding? better than other players, about even??? what bitrates and filetypes does it decode best?
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