Magnetic recording and reproduction apparatus for preventing fixed pattern noise from appearing in a reproduced image when reproducing at high speed
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United States of America Patent
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Jul 7, 1998
Issued Date -
N/A
app pub date -
May 22, 1996
filing date -
Dec 28, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A magnetic recording and reproduction apparatus wherein the drum motor is controlled so that the rotation number of the drum during playback at the normal speed multiplied by N (N is an integer) changes by a fixed factor to R(1+q/Q) (Q, q are integers satisfying .vertline.q.vertline.<.vertline.Q.vertline.), assuming the rotation number of the drum during normal playback as R rpm. Also a magnetic recording and reproduction apparatus wherein the drum motor is controlled so that the average rotation number of the drum during playback at the normal speed multiplied by N (N is an integer) becomes approximately R rpm by changing the rotation number of the drum periodically and combining a rotation number of R rpm or less and a rotation number of R rpm or more, assuming the rotation number of the drum during normal playback as R rpm.
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