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Topic: How do you determine the sampling/bit source of a lossy encode? (Read 1707 times) previous topic - next topic
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How do you determine the sampling/bit source of a lossy encode?

For example, you take a 22kHz 8bit stereo pcm and encode with lame MP3.  Or 48kHz 24bit stereo pcm and encode with Vorbis.  Or 96kHz 24bit 5.1 pcm and encode with WMA (lossy).

If you are presented only with the lossy encode, how do you determine the bits/sampling of the source? And in order to decode it "losslessly" (no up/down sampling or dithering), wouldn't your sound card or portable have to support the source bits/sampling natively? i.e. to properly playback the Vorbis, you'd need native 48/24, or to properly playback the WMA, you'd need 96/24 w/ 5.1.
 

How do you determine the sampling/bit source of a lossy encode?

Reply #1 –
Bitdepth is irelevant for transform based compression methods. Usually a decoder can output any bitdepth you need (16, 24, 32). But the sample rate is stored in the encoded file.
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