Appeal No. 1998-2565
Application 08/481,455
known digital video signals are time compressed by, for
example, a factor of 20. This would allow a film lasting 100
minutes to be transmitted in 5 minutes. At a location where
this signal is received in such time compressed form, the
invention would record the signal at a tape speed increased by
4 times a nominal tape speed with a corresponding increase in
head drum speed. Reproduction of the signal would take place
at a tape speed of 1/5 the nominal tape speed at approximately
the same head drum speed as used in recording. Thus, a factor
of 4 in recording combined with a factor of 5 in reproduction
would result in an overall factor of 20. Accordingly, the
invention would allow the 5 minute transmitted signal to be
recorded, and then reproduced at a real time of 100 minutes.
An electronic memory is used to convert the overscanned track
signals to the time base and frequency position for real time
reproduction.
Representative independent claim 1 is reproduced as
follows:
1. Time-compressed signal recording and reproducing
process by a video recorder with helical track recording at a
nominal tape longitudinal speed and a nominal head drum speed
of rotation, comprising the steps of:
-2-
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