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Bandwidth compression of the digitized HDTV images for transmission via satellitesThis paper investigates a subband coding scheme to reduce the transmission bandwidth of the digitized HDTV images. The HDTV signals are decomposed into seven bands. Each band is then independently encoded. The based band is DPCM encoded and the high bands are encoded by using nonuniform Laplacian quantizers with a dead zone. By selecting the dead zone on the basis of energy in the high bands an acceptable image quality is achieved at an average of 45 Mbits/sec (Mbps) rate. This rate is comparable to some very hardware intensive schemes of transform compression or vector quantization proposed in the literature. The subband coding scheme used in this study is considered to be of medium complexity. The 45 Mbps rate is suitable for transmission of HDTV signals via satellites.
Document ID
19920047323
Document Type
Conference Paper
Authors
Al-Asmari, A. KH. (King Saud University Riyadh, Saudi Arabia)
Kwatra, S. C. (Toledo, University OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
COMMUNICATIONS AND RADAR
Report/Patent Number
AIAA PAPER 92-2032
Meeting Information
AIAA International Communication Satellite Systems Conference and Exhibit(Washington, DC)
Funding Number(s)
CONTRACT_GRANT: NASW-4512
Distribution Limits
Public
Copyright
Other