Automatic sharpness control circuit for a television receiver

Details Automatic sharpness control circuit for a television receiver Automatic sharpness control circuit for a television receiver

1976-08-23

1978-05-16

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358166, H04N 9535, H04N 514

Patent

active

040902170

ABSTRACT:
An automatic sharpness control circuit for a color television receiver, wherein a filter having a variable filtering characteristic establishes the peaking of the frequencies forming the video signal, includes a varactor diode as the control element for the variable characteristic filter. The automatic gain control signal establishes the bias condition of the varactor diode so that the extent of peaking in the frequencies forming the video signal is automatically reduced as the strength of the video signal decreases. Accordingly, a balancing effect is created between desirable picture sharpness and the degrading effect of accentuated picture noise.

REFERENCES:
patent: 2514112 (1950-07-01), Wright et al.
patent: 3495031 (1970-02-01), Poppa
patent: 3693094 (1972-09-01), Kanamaru et al.
patent: 3706846 (1972-12-01), Siwko
patent: 3931637 (1976-01-01), Carpenter

Affiliated with

Also associated with

Rating

Automatic sharpness control circuit for a television receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic sharpness control circuit for a television receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic sharpness control circuit for a television receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1200456