Integrated synchronizing signal separating circuit for generatin

Details Integrated synchronizing signal separating circuit for generatin Integrated synchronizing signal separating circuit for generatin

1988-05-20

1989-06-27

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 20, 358148, H04N 508, H04N 9455

Patent

active

048434701

ABSTRACT:
An integrated circuit for improved burst gate pulse separation for use in a digital video system that receives a positive composite video signal wherein horizontal, vertical and composite synchronizing signals and a burst gate pulse signal are respectively separated therefrom. Said circuit comprises horizontal synchronizing output means for receiving a horizontal synchronizing signal from horizontal synchronizing separation means and a compensated output of horizontal synchronizing delay compensation means and therefrom supplying the horizontal synchronizing signal having a specified level, vertical synchronizing output means for receiving a vertical synchronizing signal and therefrom supplying the vertical synchronizing signal having a specified level, composite synchronizing output means for supplying a composite synchronizing signal having a specified level by composing the vertical synchronizing signal and the compensated horizontal synchronizing signal, and burst gate pulse generating means for providing a burst gate pulse by inverting and then clamping the horizontal synchronizing signal.

REFERENCES:
patent: 3135826 (1964-06-01), Moles et al.
patent: 4202012 (1980-05-01), Hirashima
patent: 4263610 (1981-04-01), Shanley, II et al.
patent: 4491870 (1985-01-01), Aschwanden
patent: 4707730 (1987-11-01), Alard
patent: 4707740 (1987-11-01), Stratton

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