Title :
Improved digital aperture corrector
Author :
Deeley, E.M. ; Johnson, N.
Author_Institution :
University of London, King´´s College London, Department of Electrical and Electronic Engineering, London, UK
fDate :
9/1/1974 12:00:00 AM
Abstract :
A high-speed digital system for the aperture correction of television images is described in which the amount of diagonal correction applied can be varied with respect to that in the horizontal and vertical directions. It is shown that this facility is desirable in order to correct for different forms of spread function, and that the resolution of diagonal detail in the image is improved by using the appropriate amount of diagonal correction. Noise increase in the system is examined and the errors introduced by rounding off the digitised video and correction signals are also considered.
Keywords :
digital circuits; picture processing; television broadcasting; video signals; diagonal correction; digital aperture corrector; digital circuits; high speed digital system; noise; picture processing: video signals; rounding off errors; television broadcasting; television images;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1974.0213
