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US 4,947,257 AGranted
Raster assembly processor
AssigneeBell Communications Research, Inc.
InventorsAntonio Fernandez, Hugo P. Gaggioni, Martin J. Jaquez, John D. Robbins, E. Scott Soper
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Abstract
A system for combining a plurality of video signals and various forms of still imagery such as text or graphics into a single high resolution display is disclosed. The invention system utilizes a multiport memory and a key based memory access system to flexibly compose a multiplicity of video signals and still images into a full color high definition television display comprising a plurality of overlapping windows.
Claims15
A processor for producing a high definition television image comprising
- first input means for simultaneously receiving in real time a plurality of full motion video signals,
- second input means for receiving one or more still image video signals,
- a memory system including storage means for storing a raster array of pixel locations in which a group of overlapping windows are defined, and
- output means for outputting a composite high definition television signal for forming a high definition television image comprising a plurality of real time full motion video sub-images corresponding to said plurality of full motion video signals and occupying a plurality of said windows and one or more still sub-images corresponding to said one or more still image video signals and occupying one or more of said windows,
- said memory system further including transfer means in communication with said storage means for simultaneously transferring in real time data comprising said plurality of full motion video signals and said one or more still image video signals from said first and second input means into said storage means at pixel locations defined by said windows to form frames of said high definition television signal and for transferring in real time data comprising said frames of said high definition television signal out of said storage means to said output means,
- wherein said first input means includes video image processing means for said full motion video signals and said second input means including still image interface means for enabling said still image video signals to access said memory system.
3 more elements
A processing system for forming a composite video image comprising
- a memory system including storage means for storing a raster array of pixel locations in which a plurality of overlapping windows are defined,
- first input means for simultaneously receiving in real time a plurality of full motion video signals,
- second input means for receiving a still image video signal, and
- output means for outputting a composite video signal for forming a composite video image comprising a plurality of real time full motion video sub-images corresponding to said plurality of full motion video signals and at least one still sub-image corresponding to said still image video signal,
- said memory system further including transfer means in communication with said storage means for simultaneously transferring in real time data comprising said plurality of full motion video signals and said still image video signal from said first and second input means into specific windows of said raster array in said storage means to form frames of said composite video signal and for transferring from said storage means to said output means in real time said frames of said composite video signal,
- wherein said first input means includes video image processing means for said full motion video signals and said second input means includes still image interface means for enabling said still image video signals to access said memory system.
3 more elements
A processing system for forming in real time a composite high definition television image comprising a plurality of full motion video sub-images and a plurality of still sub-images, said processing system comprising
- a memory system including storage means comprising a plurality of memory modules for storing an array of pixel locations,
- a plurality of input channels for simultaneously receiving in real time a plurality of full motion video signals and for receiving a plurality of still image video signals, said input channels including video image processing means for processing said full motion video signals and still image interface means for processing said still image signals, and
- one or more output channels for outputting a high definition television signal for forming a composite high definition television image comprising a plurality of real time full-motion video sub-images corresponding to said plurality of full motion video signals and a plurality of still sub-images corresponding to said plurality of still image video signals,
- said memory system further including high bandwidth transfer means comprising a plurality of memory interface units for interfacing said input and output channels with said memory modules, said transfer means having sufficient bandwidth for simultaneously transferring in real time data comprising said plurality of full motion video signals and said plurality of still image video signals from said input channels into said memory modules to form frames of said high definition television signal and for transferring said frames of said high definition television signal in real time out of said memory modules to said one or more output channels.
1 more element
Dependencies are inferred from the claim text.