Apparatus for processing signals representative of a computer graphics image and a real image including storing processed signals back into internal memory
First Claim
1. An image data processing apparatus comprising:
- randomly accessible first storing means consisting of a single memory unit for rewritably storing image data representative of one image frame;
first inputting means connected to a bus of a digital data processing system for inputting a first type of image data to said first storing means, said first type of image data being computer graphics data formatted to be non-interlaced and compatible with said data processing system;
first control means for controlling write-in and read-out of image data with respect to said first storing means;
second inputting means for inputting a second type of image data representative of a real image in a raster scanning, interlaced fashion to said first control means;
first outputting means connected to said first control means for outputting image data of said first type;
second outputting means connected to said first control means for outputting image data of said second type;
first feedback means for feeding the first type of image data output from said first outputting means to said first storing means; and
second feedback means for feeding the second type of image data output from said second outputting means to said first storing means;
whereinsaid first control means includes selective storing means for selectively storing either of image data input to said apparatus by said first or said second inputting means and image data appearing at said first or said second outputting means selectively through said first or second inputting means or said first or second feedback means into said first storing means based on commands from said processing system; and
said first control means also includes selective reading means for selectively reading out image data stored in said first storing means as either of image data of said first and said second type based on commands from said processing system, and feeding said first and said second type of image data to said first and said second outputting means, respectively.
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Abstract
A video data processing apparatus converts one of NTSC type and VGA type video signals to the other or overlays the two types of video signals and outputs them as either an NTSC type overlaid video signal or a VGA type overlaid video signal. The processing apparatus has two video memories for storing video signal data. One of the two video memories stores solely VGA type video data. The other video memory stores either VGA type video data or NTSC type video data depending upon the particular function being carried out by the processing apparatus. Video data may be read out from the other video memory using different scan rates so that an individually dedicated memory is not required for each type of video data in performing the above-mentioned conversions and overlays. An output of the video processing apparatus may be fed back to either one of the two video memories so that the output may be stored in one of the memories for later transfer to an external memory.
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Citations
21 Claims
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1. An image data processing apparatus comprising:
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randomly accessible first storing means consisting of a single memory unit for rewritably storing image data representative of one image frame; first inputting means connected to a bus of a digital data processing system for inputting a first type of image data to said first storing means, said first type of image data being computer graphics data formatted to be non-interlaced and compatible with said data processing system; first control means for controlling write-in and read-out of image data with respect to said first storing means; second inputting means for inputting a second type of image data representative of a real image in a raster scanning, interlaced fashion to said first control means; first outputting means connected to said first control means for outputting image data of said first type; second outputting means connected to said first control means for outputting image data of said second type; first feedback means for feeding the first type of image data output from said first outputting means to said first storing means; and second feedback means for feeding the second type of image data output from said second outputting means to said first storing means;
whereinsaid first control means includes selective storing means for selectively storing either of image data input to said apparatus by said first or said second inputting means and image data appearing at said first or said second outputting means selectively through said first or second inputting means or said first or second feedback means into said first storing means based on commands from said processing system; and said first control means also includes selective reading means for selectively reading out image data stored in said first storing means as either of image data of said first and said second type based on commands from said processing system, and feeding said first and said second type of image data to said first and said second outputting means, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image data processing apparatus comprising:
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randomly accessible first storing means consisting of a single memory unit for rewritably storing digital data representative of one frame of an image; general-purpose, digital data processing means for generating a first type of image data, said first type of image data being computer graphics data formatted to be non-interlaced; second storing means connected to a bus of said general-purpose processing means for storing the first type of image data generated by said general-purpose processing means; control means for controlling write-in and read-out of image data associated with said first and said second storing means; inputting means for inputting a second type of image data representative of a real image in a raster scanning, interlaced fashion to said control means and to first switch means; first switch means comprising a first input for receiving said second type of image signal directly from said inputting means and a second input for receiving image data from said control means, and responsive to said control means for selectively connecting either one of said first and second inputs to an output; and first outputting means connected to the output of to said first switch means for visualizing an image of the second type of image data; wherein; said control means includes first reading means for reading said first type of image data generated by said general-purpose processing means out of said second storing means to store said first type of image data in said first storing means, second reading means for reading the image data out of said first storing means in synchronism with said second type of image data input through said inputting means to feed the image data to said second input of said first switch means, and switch control means for causing said switch means to switch on a pixel-by-pixel basis, whereby the image data received on said second input is combined with the image data on said first input; and said control means is provided also with feedback means for feeding the second type of image data appearing at the output of said switch means and said control means is provided with writing means for storing the second type of image data into said first storing means. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification