Re: Stegno and DAT and digital music...
13 Sep
1993
13 Sep
'93
8:13 p.m.
The DAT coding is 16 bit fixed point. The lowest bit always has the same value which is nearly 90 db below the loudest sound. This is perceptible when it is the only signal as is demonstrated in CD demonstrator disks. A steganographer might merely not put data in quiet passages. Alternatively he could plausibly claim that it was caused by a gentle breeze outside the recording studio. In the later case he should add some noise to the next to bottom bit, or generate and add some -85 db white noise and then replace the bottom bit.
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