[EMAIL PROTECTED] wrote:
> Yes they do, but that doesn't mean achieving a higher data rate isn;t possible
> using combinations of tones an ATRAC algorithm wouldn't trash. If you
> calibratedthe volume, you could probably come up with a system that not only
> combined tones but also changes in volume to represent data bits. Phase
> shifting techniques are also not removed by ATRAC. There would be some quite
> sophisticated electronics to encode and decode the signal, but if you use a
> 22kHz tone and only represent 1 bit through phase shifting, that's still
> 22'000bps. If you applied some of the techniques modems use to this, I don't
> see why you should be able to achieve at 4 times that.
Modems only have 4kHz of bandwidth available!
MD has at least 20kHz of bandwidth available.
But given that the compression factor of ATRAC equals 5, your overal bandwidth
of ATRAC is 4kHz. Ie, faster than modem speeds is not really possible!
Cheers,
Ralph -> To much shift-keying-amplitude-keying and frequency keying will
result in ATRAC removing signals!
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Ralph Smeets Functional Verification Centre Of Competence - CMG
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