Video and graphics system with video scaling
First Claim
Patent Images
1. A video decoding system for decoding MPEG-2 video data, 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 the one or more of the plurality of pictures are downscaled horizontally when the system detects a 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.
330 Citations
20 Claims
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1. A video decoding system for decoding MPEG-2 video data, 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 the one or more of the plurality of pictures are downscaled horizontally when the system detects a bi-directionally predicted picture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16, 17)
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10. A video decoding system for decoding MPEG-2 video data comprising:
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a reconstruction stage that reconstructs the video data to generate a plurality of pictures; and a downscale filter that downscales one or more of the plurality of pictures horizontally, wherein the one or more of the plurality of pictures are downscaled horizontally when the system detects a bi-directionally predicted picture. - View Dependent Claims (11, 12, 13, 14, 15)
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18. A method of decoding MPEG-2 video data, comprising:
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decoding, at least one electronic circuit, the video data to generate a plurality of pictures; and downscaling, using the at least one electronic circuit, one or more of the plurality of pictures horizontally, wherein the one or more of the plurality of pictures are downscaled horizontally when detecting a bi-directionally predicted picture. - View Dependent Claims (19, 20)
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Specification