Method and apparatus for synchronizing a controller to a VTR for

Details Method and apparatus for synchronizing a controller to a VTR for Method and apparatus for synchronizing a controller to a VTR for

1986-10-28

1988-08-30

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358324, 358 17, H04N 987, H04N 964

Patent

active

047681020

ABSTRACT:
A VTR controller provides an internal counter which counts a frame reference to provide a number representing the position of the reference in the video color sequence. This numbr must be synchronized to the color sequence of the station reference in order to be useful. To synchronize the internal counter in an automated system, the controller places the VTR into color framed playback mode and, after a sufficient period of time, the position of the current time code value in the color sequence is computed. The position is the value that the internal counter should have at that instant in time. The value is loaded into the counter and its output is the color frame sequence number. In a manual embodiment, an operator makes a test edit with the VTR color framer off, to determine if the value in the internal counter is correct and, if not, corrects the value. Prior to the actual edit process, another computation is performed to determine the start of the time lines which control the edit process.

REFERENCES:
patent: 3878557 (1975-04-01), Vidovic
patent: 4007486 (1977-02-01), Inaba et al.
patent: 4215362 (1980-07-01), Ravizza
patent: 4376954 (1983-03-01), Ross
Ampex Corp., VRC-2 VTR Remote Controller, Installation and Operation Manual, Catalog No. 1809669, Aug., 1985.

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