On-screen signal generating apparatus for a cable television

Details On-screen signal generating apparatus for a cable television On-screen signal generating apparatus for a cable television

1994-12-28

1997-12-09

Harvey, David E.

Television

Basic receiver with additional function

For display of additional information

348569, H04N 5445

Patent

active

056965621

ABSTRACT:
An on-screen signal generating apparatus for a cable television system is capable of displaying the control commands from a remote control while watching television. A memory circuit stores color information for each pixel needed for displaying the control commands on the screen. A main control circuit receives the color information stored in the memory circuit for output to RGB latches, and generates input/output port selection signals and writing signals for latches. The latches output the pixel data to D/A convertors for converting the display data to analog format. The analog signals are then combined with the original video signal.

REFERENCES:
patent: 4591897 (1986-05-01), Edelson
patent: 5317391 (1994-05-01), Banker et al.
patent: 5355162 (1994-10-01), Yozolino et al.

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