Title :
High-resolution still-image transmission based on CCITT H.261 codec
Author :
Loui, A.C.P. ; Liou, M.L.
Author_Institution :
Bellcore, Red Bank, NJ, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
An efficient scheme is given for transmitting high-resolution still images based on a lower-resolution CCITT H.261 codec. Two transmission schemes based on a subsampling approach are studied in terms of image quality, transmission delay, and compatibility with H.261. It is found that the sequential frame-repeat scheme provides a good compromise among the different criteria. In addition, a simple progressive-reconstruction procedure for the decoded subimages is described. Simulation results show that the visual effects of such a reconstruction procedure are quite pleasing
Keywords :
codecs; video equipment; CCITT H.261 codec; compatibility; decoded subimages; high-resolution still images; image quality; progressive-reconstruction procedure; sequential frame-repeat scheme; still-image transmission; subsampling approach; transmission delay; visual effects; Codecs; Entropy; Filters; HDTV; Image reconstruction; Image resolution; Modulation coding; Pixel; Pulse modulation; Signal resolution;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
