Line contour enhancing circuit for use with video signals

Details Line contour enhancing circuit for use with video signals Line contour enhancing circuit for use with video signals

1994-12-02

1997-03-18

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348252, 348678, H04N 5208

Patent

active

056127502

ABSTRACT:
A line contour enhancing circuit comprises a second order differentiation circuit for effecting a second order differentiation to a video signal and producing a second order differentiation signal, an adding circuit for adding the video signal and the second order differentiation signal, and a non-linear amplifier having a gain characteristic in which a differentiation gain increases gradually as the level of its input signal increases. The circuit features that the second order differentiation circuit receives the video signal output from the non-linear amplifier, thereby the line contour enhancing operation is effected depending on the level of the video signal. With this arrangement the degradation of the image produced by a low luminance level video signal due to the presence of noises is prevented.

REFERENCES:
patent: 3458652 (1969-07-01), McMann, Jr.
patent: 3946153 (1976-03-01), Peth et al.
patent: 4410912 (1983-10-01), Hess et al.
patent: 4541014 (1985-09-01), Yagi
patent: 4797745 (1989-01-01), Westell
patent: 4843472 (1989-06-01), Shinada

Affiliated with

Also associated with

Rating

Line contour enhancing circuit for use with video signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Line contour enhancing circuit for use with video signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line contour enhancing circuit for use with video signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1709323