Gamma correction circuit for television receiver

Details Gamma correction circuit for television receiver Gamma correction circuit for television receiver

1997-07-15

2000-08-08

Peng, John K.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348674, 348234, 348666, 348708, 358 32, H04N 5202, H04N 9708, H04N 964, H04N 968

Patent

active

061009385

ABSTRACT:
A gamma correction circuit for a television receiver includes a low pass filter for filtering a luminance signal gamma-corrected in a transmitter side and outputting a low frequency zone component luminance signal, a luminance signal corrector for compensating for a high frequency zone component with regard to a color signal transmitted from the transmitter side and the low frequency zone component luminance signal outputted from the low pass filter, an operator for applying a subtraction and a division with regard to the low frequency zone component luminance signal outputted from the low pass filter and the corrected luminance signal, and a color signal restoration unit for restoring a original color signal using the color signal corrected in the corrector and the luminance signal outputted from operator, for thereby being provided to a CPT (color picture tube). The circuit decreases a picture quality degradation and a detail aggravation in accordance with a gamma correction and a zone confinement of a color signal in the transmitter side.

REFERENCES:
patent: 4223342 (1980-09-01), Tsuchiya et al.
patent: 5089890 (1992-02-01), Takayama
patent: 5175621 (1992-12-01), Maesato
patent: 5345265 (1994-09-01), Kim
patent: 5534948 (1996-07-01), Baldwin
patent: 5548330 (1996-08-01), Hieda et al.
patent: 5671023 (1997-09-01), Nishiwaki et al.
patent: 5786871 (1998-07-01), Penney

Affiliated with

Also associated with

Rating

Gamma correction circuit for 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 Gamma correction circuit for television receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma correction circuit for television receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1155353