Methods and apparatus for decoding high and standard definition images and for decoding digital data representing images at less than the image's full resolution
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United States of America Patent
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-
Jul 17, 2001
Grant Date -
N/A
app pub date -
Apr 28, 1998
filing date -
Jan 13, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and apparatus for implementing a reduced cost HDTV/SDTV video decoder are disclosed. The described joint video decoder is capable of decoding HDTV pictures at approximately the resolution of standard definition television pictures and can be used to decode HDTV and/or SDTV pictures. The described video decoder may be used as part of a picture-in-picture decoder circuit for providing picture-in-picture capability without providing multiple full resolution video decoders. The reduction in decoder circuit complexity is achieved through the use of a plurality of data reduction techniques including the use of a preparser, downsampling, and truncating pixel values.
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