© 2004 Computer Academic Underground
Digitally Embedding in Audio
*Audio is a very inaccurate data format
*Slight changes will be indistinguishable from the original to the human ear *In Audio, you can use the least-significant bits of each byte as redundant bits *Use the redundant bits to minimize the impact of changes
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•Media formats in general tend to be very inaccurate data formats because they don’t need to be accurate.  The human ear is not very good at differentiating sounds.
•For example, recording the same orchestra performance with two separate recording devices will produce vastly different recordings when viewed digitally, but will generally sound similar if recorded in a similar manner.
•Changes in an audio bit-stream can be done so slightly that when played back the human ear won’t be able to distinguish the difference between the cover-audio file and the stego-audio file.
•With Audio, you can use the least-significant bits from each byte of the data as the redundant bits with which to embed data.