* Dave Kimmel <[EMAIL PROTECTED]> on Thu, 11 Jan 2001
| ATRAC is lossy because it does NOT return the same data after
| decompression that it was given for compression. ATRAC throws out
| information in order to make it easier to compress the data, therefore the
| compression and decompression process loses data.
There are two technical errors in that statement:
ATRAC uses 5:1 bitwise reduction but no additional data compression. MD-74
can hold 74 minutes of music, the same as CD-DA, on a disc 1/5 the size of
a CD because it is storing exactly 1/5 the number of bits.
Bitwise reduction does not make the stream more compressible.
| This is, coincidentally, why audio MD equipment would be very poor for
| data storage. I believe this has been discussed on-list a few times.
People have used inherently "lossy" analog schemes for reliable data
storage and transmission for decades. It really depends on the modulation
scheme used. It would not be as efficient as writing to the raw device but
there is no technical reason why it could not work.
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