Television – Bandwidth reduction system – Format type
Patent
1994-11-16
1996-04-16
Britton, Howard W.
Television
Bandwidth reduction system
Format type
348432, 348433, 381 2, H04N 726
Patent
active
055087469
ABSTRACT:
A method for incorporating future developments in video compression technology to migrate toward a better television system in a receiver-compatible manner. The invention uses enhancement data that can be combined with standard video data. Standard HDTV receivers will utilize standard video data, ignoring the enhancement data. More advanced HDTV receivers will combine the enhancement data with standard data. The television signal is transmitted in a format comprising a first set of bits that represents images at a first quality (e.g., first resolution) and that can be decoded to provide an output at the first resolution, and a second set of bits that represents enhancement information and that can be decoded and used in conjunction with the first set of bits to provide an output at a second resolution greater than the first resolution. The first set of bits is decoded according to a first decoding procedure to provide information representative of images at the first resolution. The second set of bits is decoded according to a second decoding procedure to provide the enhancement information. And at least some of the enhancement information and at least some of the information representative of images at the first resolution are used to provide the output at the second resolution.
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Britton Howard W.
Massachusetts Institute of Technology
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