Synchronizing signal generating circuit

Details Synchronizing signal generating circuit Synchronizing signal generating circuit

1987-12-16

1989-05-02

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358153, 358158, H04N 504, H04N 508

Patent

active

048273414

ABSTRACT:
A synchronizing signal generating circuit is incorporated in a digital image storing device. When a plurality of video signals composed of different numbers of scanning lines and issued from television cameras of different types of various diagnostic apparatus are converted from analog to digital signals and stored per frame in an image memory in the digital image storing apparatus, sampling pulses for an A/D converter which are synchronous with the horizontal synchronizing signals of the video signals and field discriminating signals relative to odd-numbered fields and even-numbered fields, among composite synchronizing signals, are generated by using an N-multiplier including an equalizing pulse remover controlled by an F/V converter and a field discriminating circuit with a field discriminating time constant being automatically controlled by the F/V converter. The video signals are stored per frame in the image memory on a real-time basis by utilizing the sampling pulses and the field discriminating signal.

REFERENCES:
patent: 4364091 (1982-12-01), Taguchi et al.
patent: 4701800 (1987-10-01), Akimoto et al.
patent: 4709268 (1987-11-01), Akimoto et al.

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