Adaptive noise reduction for digital display panels

Details Adaptive noise reduction for digital display panels Adaptive noise reduction for digital display panels

2003-08-05

2010-06-22

Natnael, Paulos M (Department: 2622)

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

Reexamination Certificate

active

07742109

ABSTRACT:
A plasma display panel is a pure linear display and does not provide a non-linear gamma behavior like a CRT so that an artificial gamma function has to be applied to the signal in digital form. This gamma function increases the quantization steps in the dark areas whereas the quantization steps will be reduced in the luminous areas. The basic idea is to apply an adaptive noise filtering after the gammatization process. The adaptive filtering is a specific filtering which is adapted to the gammatization quantization noise. In other words, the filtering will be maximum for dark areas and its efficacy will be automatically decreased when the luminance of the area is increasing.

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Search Report Dated Oct. 27, 2003.

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