Television – Bandwidth reduction system – Data rate reduction
Patent
1996-01-29
1998-04-07
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348403, 348405, 348408, 382248, H04N 730
Patent
active
057370192
ABSTRACT:
An apparatus for transforming the resolution of an image from a first image resolution to a second image resolution using operations in the spatial frequency domain. A first group of transform values which represent the image at the first image resolution are mapped to a second group of transform values which represent the image at the second image resolution in the spatial frequency domain. The apparatus includes stored pre-computed values which are the mapping coefficient values between the first group of transform values and the second group of transform values. The pre-computed values are retrieved from a memory and used to directly map the first group of transform values to the second group of transform values in the spatial frequency domain.
REFERENCES:
patent: 5262854 (1993-11-01), Ng
patent: 5635985 (1997-06-01), Boyce
Jill Bocye, John Henderson and Larry Pearlstein, "SDTVReceivers with HDTV Decoding Capability," ACATS Technical Subgroup Meeting, May 18, 1995, Washington, D.C., (18 pp).
H. Blair Benson, revised by Jerry Whitaker, "Television Engineering Handbood,", Copyright 1992, 1986 by McGraw-Hill, Inc., (7 pp.).
Britton Howard W.
Matsushita Electric Corporation of America
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