8 Oct
2002
8 Oct
'02
12:01 p.m.
On Tue, Oct 08, 2002 at 07:17:43 -0600, Cornell III, Howard M wrote:
But encode the time so that it can be read forward or
backward.
You dont have to, because you know what direction its being read in from
the saw.
An obvious problem is if you jump, then hold the disk and let it turn
slowly, it might take a fair turn before the position can be read...
45rpm = 1 1/3 sec per rev
assume 2400 baud timcode, 16 bits of timecode info (inc. stop bits etc)
= 13.3ms for 2 whole timecode blocks
therefore (max) 1/100th of a revolution to pick up the timecode position
= 1" at the edge of a 12" record. min would be 1/2"
hmm... that doesn't sound too bad to me, and you may be able to get better
than 16bits @ 2400 baud.
- Steve