Television receiver with perceived contrast reduction in a prede

Details Television receiver with perceived contrast reduction in a prede Television receiver with perceived contrast reduction in a prede

1994-09-19

1995-05-23

Groody, James J.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348589, H04N 557, H04N 974

Patent

active

054185769

ABSTRACT:
The television receiver includes a text generation mechanism which is capable of superimposing text on a received picture. In order to make the text more legible, while still retaining picture information a reduced contrast area is formed around the text. In order to superimpose the text on the picture text, RGB signals are applied to the video output circuits together with a switching signal (VDS) which causes either text or picture signals to be applied to the display device. To provide a reduced contrast area around the text display the switching signal (VDS) is arranged to switch between the picture signal and blanking level at a fast rate, for example at the clock rate, to produce the reduced contrast area.

REFERENCES:
patent: 3903517 (1975-09-01), Hafner
patent: 4301473 (1981-11-01), Wallace et al.
patent: 4356511 (1982-10-01), Tsujimura
patent: 4451840 (1984-05-01), Shanley
patent: 4549217 (1985-10-01), Sendelweck
patent: 4549218 (1985-10-01), Norley
patent: 4860106 (1989-08-01), Taupin et al.
patent: 5017143 (1991-05-01), Backup
patent: 5249050 (1993-09-01), Zato
IEE Standard Dictionary of Electrical and Electronic Terms pp. 106, 188.
"LSI Chip Set For Closed Caption Decoder System", by Harigai et al, IEEE Transactions on Consumer Electronics, 37 (1991) Aug., No. 3, pp. 449-454.

Affiliated with

Also associated with

Rating

Television receiver with perceived contrast reduction in a prede does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Television receiver with perceived contrast reduction in a prede, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Television receiver with perceived contrast reduction in a prede will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2143457