Title :
Nonlinear temporal filter for television picture noise reduction
Author_Institution :
University of Essex, Department of Electrical Engineering Science, Colchester, UK
fDate :
4/1/1980 12:00:00 AM
Abstract :
A conventional recursive interframe lowpass filter for 625 line 5.5 MHz monochrome television is modified so that its attenuation of frame differences is instantaneously dependent on their amplitude. This results in improved rendition of motion when compared with the original design. Performance is assessed by objective measurement of noise attenuation for a range of input noise levels and nonlinear characteristics, and by subjective opinion tests on pictures containing noise and movement.
Keywords :
digital filters; interference suppression; low-pass filters; radiofrequency filters; television interference; 5.5 MHz monochrome television; attenuation; digital filters; frame differences; input noise levels; nonlinear temporal filter; radiofrequency filters; recursive interframe lowpass filter; television interference suppression; television picture noise reduction;
Journal_Title :
Electronic Circuits and Systems, IEE Proceedings G
DOI :
10.1049/ip-g-1:19800009
