>We all call ATRAC "compression", when it is not. It is bitwise reduction.
No ATRAC is compression. It's removing audio from the PCM stream. Cutoff and
compression ARE NOT the same. How many times do we have to say this?
>A single side of an
>analog Laserdisc can hold about as much audio data as two CDs. >Do the
>math: the linear PCM data requires about 1/4 of the physical >media as the
>analog data. IOW, analog to 16-bit PCM results in ~4:1 >compression.
Yeah BUT, analog signals when recorded don't have a set size. You can't say
"1 minute of analog audio takes 5MB", you just can't. You can control the
amount of audio it holds by changing the speed.
>Or is all this just a double-standard? I mean, compression >means "make
>smaller", right? If the digitization process makes the signal >smaller,
>then explain to me why it isn't compression.
Because, within the human hearing limits, all the audio is there and has
been modified. You can save it and save it and save it and the bitstream is
the same EVERY TIME. Unlike MP3 where the more you compress it, the worse it
sounds.
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