Video signal processing

Details Video signal processing Video signal processing

2005-09-20

2005-09-20

Miller, John (Department: 2614)

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

C348S607000, C348S630000, C348S674000

Reexamination Certificate

active

06947098

ABSTRACT:
A control signal (k_lum) derived from the luminance component (Y) of a video signal is used to adaptively control a temporal noise reduction filter (10) according to the level of motion in a video image. To compress the control signal for storage in a memory (30), the control signal is averaged over each 2×2 pixel area, and then a non-linear compression function is applied. The non-linear compression function preferably selects quantization values of the control signal which correspond to a perceptually substantially linear response in the noise reduction factor (NRF) of the noise filter (10).

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