MPEG bit-stream format converter for changing resolution

Details MPEG bit-stream format converter for changing resolution MPEG bit-stream format converter for changing resolution

1996-03-29

1999-07-20

Moore, David K.

Image analysis

Image compression or coding

Adaptive coding

382232, 348415, G06K 936, H04N 712

Patent

active

059265736

ABSTRACT:
An apparatus or transforming the resolution of an image from a first image resolution to a second image resolution using operations in the spatial frequency domain. The apparatus converts the bit-stream format which defines the first image and can be used to, for example, change the resolution of an MPEG encoded video signal by converting the MPED bitstream. The apparatus generates converted macroblocks from original macroblocks. During conversion, the apparatus determines whether the converted macroblock is (1) intra or non-intra coded, (2) P-coded or B-coded, and (3) in field format or frame format. The apparatus may also include the selection of a motion vector for the converted macroblock from the original macroblocks. Further, the apparatus may also map a first group of transform values which represent the image at the first image resolution to a second group of transform values which represent the image the second image resolution in the spatial frequency domain.

REFERENCES:
patent: 5270813 (1993-12-01), Puri et al.
Jill Boyce, John Henderson and Larry Pearlstein, "SDTV Receivers 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 Handbook", Copyright 1992, 1986, by McGraw Hill, Inc., (pp. 18.2-18.7).

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