Method and apparatus for decoding both high and standard definition video signals using a single video decoder
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United States of America Patent
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Feb 15, 2000
Issued Date -
N/A
app pub date -
Apr 25, 1997
filing date -
Oct 11, 1994
priority date (Note) -
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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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