Variable-speed playback apparatus and method for digital video signals
A technology of digital information, generating device, applied in the field of devices for reproducing digital signals from a magnetic tape at a tape advance rate
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[0031] A typical head trajectory pattern obtained during a playback operation using two facing heads at a velocity 9.0 times the normal traveling tape velocity is shown in FIG. It should be noted that numerals 0 to 9 in the figure are track numbers in units of one frame. Also, since the azimuth angle of the playback head is relative to the track with an even number, the data in the shaded area is played out.
[0032] In this figure, the track starts at one end of the tape extending towards the track with track number 0 (at a drum wrap angle of 0 degrees) and ends at one end of the tape with track number 8 (at a drum wrap angle of 180 degrees) The track extends to the other end of the tape. If the tape travels exactly at 9.0 times speed, the track phase will increase at a position having a drum winding angle of 180° when the track number is counted.
[0033] In the present invention, the output of a counter is used as a reference signal, which counter resets itself periodical...
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