Title :
A VLSI median filter for impulse noise elimination in composite or component TV signals
Author :
Christopher, Lauren A. ; Mayweather, William T., III ; Perlman, Stuart S.
Author_Institution :
David Sarnoff Res. Center, Princeton, NJ, USA
fDate :
2/1/1988 12:00:00 AM
Abstract :
A VLSI median filter with novel masking modes and adaptive threshold control is described. The 16 masking modes select 1, 3, 5 or 9 pixels of a 5×3 pixel field for filtering. This feature makes it possible to median-filter NTSC composite video (baseband) or component R, G, and B signals. The input threshold value and the SWAP signal (indicating substitution of the median value) can be used together to adapt transmission path conditions. The circuit removes impulsive noise caused by FM-carrier-to-noise degradation, common in cable and satellite TV systems. The filter is applicable to other impulse noise sources created by auto engines and household appliances, and is also generally useful in image and signal processing tasks
Keywords :
CMOS integrated circuits; VLSI; digital filters; interference suppression; video signals; CMOS; FM-carrier-to-noise degradation; NTSC composite video; RGB signals; VLSI median filter; adaptive threshold control; auto engines; baseband; cable TV; component TV signals; composite TV signals; digital filters; household appliances; image processing; impulse noise elimination; impulse noise sources; masking modes; satellite TV systems; signal processing; Adaptive control; Adaptive filters; Baseband; Cable TV; Circuit noise; Degradation; Filtering; Programmable control; Satellite broadcasting; Very large scale integration;
Journal_Title :
Consumer Electronics, IEEE Transactions on
