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Real-time filtering and detection of dynamics for compression of HDTVThe preprocessing of video sequences for data compressing is discussed. The end goal associated with this is a compression system for HDTV capable of transmitting perceptually lossless sequences at under one bit per pixel. Two subtopics were emphasized to prepare the video signal for more efficient coding: (1) nonlinear filtering to remove noise and shape the signal spectrum to take advantage of insensitivities of human viewers; and (2) segmentation of each frame into temporally dynamic/static regions for conditional frame replenishment. The latter technique operates best under the assumption that the sequence can be modelled as a superposition of active foreground and static background. The considerations were restricted to monochrome data, since it was expected to use the standard luminance/chrominance decomposition, which concentrates most of the bandwidth requirements in the luminance. Similar methods may be applied to the two chrominance signals.
Document ID
19910007283
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Sauer, Ken D. (Notre Dame Univ. IN, United States)
Bauer, Peter (Notre Dame Univ. IN, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Subject Category
Computer Programming And Software
Report/Patent Number
NASA-CR-187777
NAS 1.26:187777
Accession Number
91N16596
Funding Number(s)
CONTRACT_GRANT: NAG3-1186
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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