Graphics display system with anti-flutter filtering and vertical scaling feature
DCFirst Claim
Patent Images
1. One or more circuits for processing graphics and video images to produce a blended image, the one or more circuits comprising:
- at least one interface operable to receive one or both of video and audio; and
at least one processor operably coupled to the at least one interface and to at least one memory located within or external to the one or more circuits, the at least one processor operable to;
blend a plurality of graphics images using a plurality of alpha values associated with the graphics images to generate a blended graphics image for storage in the at least one memory,process the graphics images and/or the blended graphics image to place the blended graphics image in a format suitable for blending with a video image, andblend the blended graphics image with the video image using the alpha values and/or at least one value derived from the alpha values.
2 Assignments
Litigations
1 Petition
Reexamination
Accused Products
Abstract
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, and graphics input. The chip includes a single polyphase filter that preferably provides both anti-flutter filtering and scaling of graphics. Anti-flutter filtering may help reduce display flicker due to the interlaced nature of television displays. The scaling of graphics may be used to convert the normally square pixel aspect ratio of graphics to the normally rectangular pixel aspect ratio of video.
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Citations
22 Claims
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1. One or more circuits for processing graphics and video images to produce a blended image, the one or more circuits comprising:
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at least one interface operable to receive one or both of video and audio; and at least one processor operably coupled to the at least one interface and to at least one memory located within or external to the one or more circuits, the at least one processor operable to; blend a plurality of graphics images using a plurality of alpha values associated with the graphics images to generate a blended graphics image for storage in the at least one memory, process the graphics images and/or the blended graphics image to place the blended graphics image in a format suitable for blending with a video image, and blend the blended graphics image with the video image using the alpha values and/or at least one value derived from the alpha values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. At least one circuit for generating a display image using a plurality of graphics images and a video image, the at least one circuit operational to, at least:
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blend the plurality of graphics images using a plurality of alpha values associated with the graphics images to generate a blended graphics image, wherein the graphics images and/or the blended graphics image is processed to place the blended graphics image in a format suitable for blending with the video image; store the blended graphics image in a memory; and blend the blended graphics image with the video image using the alpha values and/or at least one value derived from the alpha values to generate the display image. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A computer-readable storage, having stored thereon a computer program having a plurality of code sections for generating a display image using a plurality of graphics images and a video image, the code sections executable by a processor for causing the processor to perform the operations comprising:
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blending the plurality of graphics images using a plurality of alpha values associated with the graphics images to generate a blended graphics image, wherein the graphics images and/or the blended graphics image is processed to place the blended graphics image in a format suitable for blending with the video image; storing the blended graphics image in a memory; and blending the blended graphics image with the video image using the alpha values and/or at least one value derived from the alpha values to generate the display image. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification