DocumentCode
913596
Title
Nonlinear temporal filter for television picture noise reduction
Author
Dennis, T.J.
Author_Institution
University of Essex, Department of Electrical Engineering Science, Colchester, UK
Volume
127
Issue
2
fYear
1980
fDate
4/1/1980 12:00:00 AM
Firstpage
52
Lastpage
56
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;
fLanguage
English
Journal_Title
Electronic Circuits and Systems, IEE Proceedings G
Publisher
iet
ISSN
0143-7089
Type
jour
DOI
10.1049/ip-g-1:19800009
Filename
4644514
Link To Document