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A comparison of theoretical and experimental video compression designsThis paper compares theoretical and experimental picture compression designs, for images processed in 8 x 8 blocks using the Walsh-Hadamard transform (WHT). The optimum picture compression design is well known, if the mean-square error (mse) is used as the measure of distortion, and if it is assumed that the video process is a stationary first-order Markov process with a Gaussian distribution. This theoretical design gives useful results when the transform processing is done on full pictures, but gives inferior results (relative to empirical design) when transform processing is done on small 8 x 8 blocks. The use of non-Gaussian distributions for the transform components fails to improve this poor performance, which is due to the nonstationary nature of the video process. An experimentally based design procedure, which considers nonstationarity, yields significantly improved mse and subjective performance.
Document ID
19790042235
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jones, H. W., Jr.
(COM-CODE, Inc. Mountain View, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
February 1, 1979
Publication Information
Publication: IEEE Transactions on Electromagnetic Compatibility
Volume: EMC-21
Subject Category
Communications And Radar
Accession Number
79A26248
Funding Number(s)
CONTRACT_GRANT: NAS2-9703
Distribution Limits
Public
Copyright
Other

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