Superimposing circuit for a video apparatus

Details Superimposing circuit for a video apparatus Superimposing circuit for a video apparatus

1991-12-26

1992-12-29

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358335, 358906, 358909, 358319, 360 18, H04N 576

Patent

active

051756293

ABSTRACT:
A superimposing circuit for a video apparatus comprises a first switch circuit for selecting an input video signal in response to a selected record or a playback mode, a second switch circuit for synthesizing a video signal and character information during the record mode, a third switch circuit for synthesizing the video signal and the character information during the playback mode, a switch device, a comparator for receiving the output of the switch device as a reference level, a character generating circuit, and a controller for controlling the switching of the second switch circuit and the third switching circuit in accordance with the selected one of the record mode and the playback mode.

REFERENCES:
patent: 4688105 (1987-08-01), Bloch et al.
patent: 4947264 (1990-08-01), Narusawa
patent: 5065252 (1991-11-01), Yoshio et el.
patent: 5097348 (1992-03-01), Suetaka

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