Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1997-07-16
1999-01-26
Tran, Thai
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 79, 360 7701, H04N 591
Patent
active
058646485
ABSTRACT:
Magnetic recording/reproducing apparatus is constructed in such that a personal computer is electrically connected to the apparatus through connectors, and that a track deviation caused by the apparatus itself is measured through the personal computer by a nondestructive manner upon tape running operation by installing a test magnetic tape formed with recorded tracks having almost no track deviation to the apparatus so as to be helically wound around the rotary drum rotating with magnetic heads in a predetermined angular range and direction. The apparatus has a device for stepwise shifting the magnetic heads in a longitudinal direction of the test magnetic tape for causing the magnetic head positions to displace stepwise and relatively with respect to the tracks along a track traversing line of the recorded tracks in response to a command directed from the personal computer and a device for outputting values of an FM signal measured at a plural measuring points predetermined along a head scanning direction of the recorded track at every stepwise shifted magnetic head positions as the magnetic head scans the recorded tracks of the test magnetic tape. The values of the FM signal outputted from the device are inputted to the personal computer for further processing.
REFERENCES:
patent: 4943873 (1990-07-01), Kawasaki
patent: 5475662 (1995-12-01), Miyagawa et al.
Machida Toyotaka
Samuta Osamu
Sasaki Masamichi
Meller Michael N.
Onuaku Christopher
Tran Thai
Victor Company of Japan Ltd.
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