I'm curious, does anyone know of a way to analyze a wave file to determine the quantity of information in it? For example, given a particular .wav file, how can I find out if it's an original or was encoded to something lossy and back? Is there a way to get the vorbis encoder to spit out some data on how much useful information it discovers in an input? Surely the encoder might notice if there's so little information in an input that it can encode it more-or-less losslessly...? --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Eric Seppanen wrote:> > I'm curious, does anyone know of a way to analyze a wave file to determine > the quantity of information in it? For example, given a particular .wav > file, how can I find out if it's an original or was encoded to something > lossy and back?Just look at a spectrogram. Big empty regions at the high frequencies ==> lossy. Lots of other features, too (it's not very hard to see which codec you're looking at). <p>Segher --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.