Method and system for synchronizing the movement of plural recor

Details Method and system for synchronizing the movement of plural recor Method and system for synchronizing the movement of plural recor

1978-06-16

1980-07-01

Moffitt, James W.

Dynamic magnetic information storage or retrieval

Record editing

360 722, G11B 1552

Patent

active

042109396

ABSTRACT:
A method and system are provided for synchronizing the movement of a first recording medium by a first transport mechanism including a capstan with the movement of a second recording medium by a second transport mechanism also including a capstan, each of the first and second recording media having addressable recording frames identified by frame signals and addresses recorded thereon. The first and second recording media are rewound from respective predetermined addressable frames identified as T.sub.AO and T.sub.BO, respectively. The first recording medium is advanced from its rewound position toward frame T.sub.AO at a fixed speed, e.g., a normal tape advance speed, in a capstan servo-locked condition, and the second recording medium is advanced from its rewound position toward frame T.sub.BO at a selective speed greater than, equal to or less than the fixed speed. Addresses T.sub.A and T.sub.B of the first and second recording media, respectively, are played back as the recording media are advanced. The address differential T.sub.A -T.sub.B is compared with the fixed address differential T.sub.AO -T.sub.BO, or the address differential T.sub.A - T.sub.AO is compared to the address differential T.sub.B -T.sub.BO, so as to advance the second recording medium at a speed corresponding to this comparison. When the respective address differentials are equal, that is, when T.sub.A -T.sub.B =T.sub.AO -T.sub.BO, or when T.sub.A -T.sub.AO =T.sub.B -T.sub.BO, the second recording medium is advanced at a servo-controlled fixed speed, provided that this address differential remains equal for a predetermined number of successive address playback operations.

REFERENCES:
patent: 3851116 (1974-11-01), Cannon
patent: 3911488 (1975-10-01), Wood et al.
patent: 4066349 (1978-01-01), Flint
patent: 4067049 (1978-01-01), Kelly et al.
patent: 4115819 (1978-09-01), Shigeta

Affiliated with

Also associated with

Rating

Method and system for synchronizing the movement of plural recor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for synchronizing the movement of plural recor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for synchronizing the movement of plural recor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-301679