Magnetic recording and reproduction apparatus for preventing fix

Details Magnetic recording and reproduction apparatus for preventing fix Magnetic recording and reproduction apparatus for preventing fix

1996-05-22

1998-07-07

Sniezek, Andrew L.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 81, 386 76, H04N 591

Patent

active

057781389

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.

REFERENCES:
patent: 4626936 (1986-12-01), Yoshino
patent: 4930027 (1990-05-01), Steele et al.
patent: 4943872 (1990-07-01), Yamazaki
patent: 5027235 (1991-06-01), Furuyama
patent: 5181146 (1993-01-01), Koga
patent: 5276557 (1994-01-01), Nagashima et al.
"An Experimental Digital VCR with 40mm Drum, Single Actuator and DCT-Base Bit-Rate Reduction" IEEE-vol. 34, No. 3, Aug. 1988-pp. 597-605.
"Measurement of Error Rate During High-Speed Playback in Digital VTR" (44th joint conference) Kyushu Chapter Meeting 1991, Okuma et al, p. 158.

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