Hi, Predicting loss of data when encoding mp3 is more suitable for an mp3 discussion forum instead of a lossless format one. A pointer - it isn't possible. It heavily depends on the encoder, compression quality and specific settings. No one will be able to give you a definite answer, as the psychoacoustic model is a complex thing. The best thing you can do is encode the data in mp3 and then compare it. If you really need to predict it - transients ( http://en.wikipedia.org/wiki/Transient_(acoustics) ) are the most difficult to encode with mp3.
Regards, Ivailo Karamanolev On Tue, Mar 20, 2012 at 1:27 PM, Ajay Mandlekar <[email protected]>wrote: > Hello, > > My partner and I are both high school students who are working on a > device that encrypts secret messages into sound files. The method that > we are using involves the conversion of data into an mp3 format, and > this results in a loss of data that is crucial to the success of the > device. We would like to be able to predict which points are going to > be modified significantly or lost completely when we write our data as > an mp3. Could you help us? > > We were able to achieve success with .flac files (since they're a > lossless audio format), but with mp3 files, were unable to recover the > secret message since the mp3 compression altered the data points. We > were thinking that if we could know which points (in the time domain) > would be adversely affected, we could avoid encrypting in those points. Any > clarification on how .mp3 files compress data would be very helpful. > Thank you! > _______________________________________________ > flac-dev mailing list > [email protected] > http://lists.xiph.org/mailman/listinfo/flac-dev >
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