Video and graphics system with video scaling
First Claim
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1. A video decoding system for decoding MPEG-2 video data, said system comprising:
- means for reconstructing the video data to generate a plurality of pictures; and
means for downscaling one or more of the plurality of pictures horizontally,wherein downscaling of the one or more of the plurality of pictures in the horizontal direction is disabled when the system detects that the one or more of the plurality of pictures does not include bi-directionally predicted picture.
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Abstract
A video and graphics system has a reduced memory mode in which video images are reduced in half in horizontal direction during decoding. The video and graphics system includes a video decoder for decoding MPEG-2 video data. The video images may not be downscaled in the horizontal direction when no bi-directionally predicted pictures are used. The video and graphics system may output an HDTV video while converting the HDTV video and providing as another output having an SDTV format or another HDTV format. The output having an SDTV format may be recorded using a video cassette recorder (VCR) while the HDTV video is being displayed.
346 Citations
18 Claims
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1. A video decoding system for decoding MPEG-2 video data, said system comprising:
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means for reconstructing the video data to generate a plurality of pictures; and means for downscaling one or more of the plurality of pictures horizontally, wherein downscaling of the one or more of the plurality of pictures in the horizontal direction is disabled when the system detects that the one or more of the plurality of pictures does not include bi-directionally predicted picture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-transitory computer readable medium for decoding MPEG-2 video data, said non-transitory computer readable medium storing a plurality of instructions, said plurality of instructions comprising:
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reconstructing the video data to generate a plurality of pictures; and downscaling one or more of the plurality of pictures horizontally; and maintaining vertical scaling of the one or more pictures; wherein the one or more of the plurality of pictures in the horizontal direction when the system detects a bi-directionally predicted picture. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification