Clamp circuit for clamping a digital video signal

Details Clamp circuit for clamping a digital video signal Clamp circuit for clamping a digital video signal

2006-08-22

2006-08-22

Yenke, Brian P. (Department: 2622)

Television

Image signal processing circuitry specific to television

Dc insertion

C348S689000, C327S309000

Reexamination Certificate

active

07095452

ABSTRACT:
A clamp control circuit outputs a clamp control signal after a delay of a predetermined time if a digital video signal is detected. A sampling circuit that extracts sampling data of a pedestal level from a luminance corrected signal based on a clamp pulse at a timing of the back porch. A data averaging circuit calculates an average of the sampling data of the pedestal level. A data holding circuit holds a difference between the average and a digital signal processing reference level when the clamp control signal is output and also when the clamp control signal is not output. A level correction circuit corrects a level of the luminance signal based on the difference held by the data holding circuit and outputs the corrected luminance signal.

REFERENCES:
patent: 5341218 (1994-08-01), Kaneko et al.
patent: 5508749 (1996-04-01), Matsuo
patent: 5907655 (1999-05-01), Oguro
patent: 6462782 (2002-10-01), Honda et al.
patent: 6580465 (2003-06-01), Sato
patent: 6909467 (2005-06-01), Kuzumoto et al.
patent: 7030936 (2006-04-01), Sasada
patent: 2002/0047934 (2002-04-01), Nitta et al.
patent: 2003/0001976 (2003-01-01), Sasada
patent: 06-133184 (1994-05-01), None
patent: 11-88723 (1999-03-01), None

Affiliated with

Also associated with

Rating

Clamp circuit for clamping a digital video signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clamp circuit for clamping a digital video signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clamp circuit for clamping a digital video signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3714677