Television synchronizing system operable from nonstandard signal

Details Television synchronizing system operable from nonstandard signal Television synchronizing system operable from nonstandard signal

1979-11-27

1981-02-24

Safourek, Benedict V.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358158, H04N 504

Patent

active

042531160

ABSTRACT:
A synchronizing signal for a television camera includes a count-down system by which standard horizontal and vertical synchronizing signals are generated and added to the video signals being produced. In order to allow the camera to be synchronized to a nonstandard source of synchronizing signals such as a television game, computer with TV display, another television camera or a video recorder for allowing split-screen applications, the count-down system is phase-locked to the external sync portions of the external sync signals. Thus, standard sync signals are produced by the camera at a rate controlled by a nonstandard sync source. In order to prevent slewing of the system during the vertical equalizing or synchronizing portions of the external sync signals, the phase-lock loop which controls the frequency of the count-down system is inhibited during at least the vertical synchronizing and equalizing pulse portions of the external synchronizing signals.

REFERENCES:
patent: 3688037 (1972-08-01), Ipri
patent: 3846584 (1974-11-01), Itoh
patent: 3878335 (1975-04-01), Balaban
patent: 3899635 (1975-08-01), Steckler
patent: 4015288 (1977-03-01), Ebihara
patent: 4025952 (1977-05-01), Eckenbrecht
patent: 4063288 (1977-12-01), Eckenbrecht
patent: 4096528 (1978-06-01), Tuma
patent: 4144544 (1979-03-01), Fernsler
patent: 4203076 (1980-05-01), Yamashita

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