* "Magic" <[EMAIL PROTECTED]> on Wed, 15 Mar 2000
| Possibly it would, although it may need to be a rather faster ATRAC.
| Remember this whole thread started because I suggested that it would be
| better to implement ATRAC encoding at the PC rather than at the MD because
| it would free up the USB bus.
USB 1.1 maxes out at 12Mb/s (bit vs. Byte), or 90MB/minute. A 74 minute CD
is 640MB, or ~8MB/minute. Kick the math around and, after you figure in
something like a 5% loss due to overhead, you can dump raw, 16-bit PCM down
the USB pipe about 10 times faster than real-time playback. Encoding on
the host machine saves you nothing.
| Perhaps encoding on the PC shouldn't be in software but, as you suggest,
| as hardware. Perhaps a modified form of sound card that outputs a special
| ATRAC encoded stream at high speed.
The entire point of USB is to move hardware *outside* of the host machine.
If you put the encoder inside, then there is no reason for a USB device.
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