Image processing device
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Abstract
An inexpensive and simple circuit for improving the quality of a dynamic image, with appropriate, flexible dynamic image qualities processing, even with plural input signal sources. A memory unit has a region for storing images of at least one screen, and a memory control unit for writing image data to the memory unit on the basis of a first clock and a first image synchronizing signal and for outputting image data read out from the memory unit on the basis of a second clock and a second image synchronizing signal. A clock generating unit provides the second clock, and a synchronizing control unit inputs the second clock and outputs the second image synchronizing signal. The synchronizing control unit generates one signal asynchronous to the first image synchronizing signal, by dividing the second clock, and another that is and synchronized with the first synchronizing signal, by using the second clock, and selects one of the signals it has produced to be output as the second image synchronizing signal. In a case of multiple input signals, then such fourth image synchronizing signals equal in number to the input signals are produced.
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Citations
56 Claims
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1-39. -39. (canceled)
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40. An image processing device, comprising at least one signal input unit to which video signals of a plurality of systems are inputted, a memory unit having a memory region for storing images of at least one screen, at least one image display signal output unit, image processing means for synthesizing the video signals of said plurality of systems on said memory unit to output it to said signal output units, and control means for controlling said image processing means,
wherein said control means, having communication means for outputting a request of changing image characteristics to at least one input video signal of said plurality of systems, select a preferential video signal according to image characteristic information of the video signals of said plurality of systems, change the operation of said image processing means to one appropriate for the video signal of the preferential system, and output a request of changing image characteristics to those appropriate for the operation of said image processing means to video signals of at least one system other than the video signal of the preferential system.
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41. An image processing device, comprising at least one signal input unit to which video signals of a plurality of systems are inputted, a memory unit having a memory region for storing images of at least one screen, at least one image display signal output unit, image processing means for synthesizing the video signals of said plurality of systems on said memory unit to output it to said signal output unit, and control means for controlling said image processing means,
wherein said control means, having communication means for outputting a request of changing image characteristics to at least one input video signal of said plurality of systems, select a preferential video signal according to image characteristic information of the video signals of said plurality of systems and characteristic information of the image display units connected to said signal output unit, change the operation of said image processing means to one appropriate for the video signal of the preferential system and the image display units connected to said signal output unit, and output a request of changing image characteristics to those appropriate for the operation of said image processing means to video signals of at least one system other than the video signal of the preferential system.
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42. An image processing device, comprising at least one signal input unit to which video signals of a plurality of systems are inputted, a memory unit having a memory region for storing images of at least one screen, at least one image display signal output unit, image processing means for synthesizing the video signals of said plurality of systems on said memory unit to output it to said signal output unit, and control means for controlling said image processing means,
wherein said control means, having communication means for outputting a request of changing image characteristics to at least one input video signal of said plurality of systems, select a preferential video signal according to image characteristic information of the video signals of said plurality of systems and arrangement conditions for a screen on which the video signals of said plurality of systems are output to said signal output unit, change the operation of said image processing means to one appropriate for the video signal of the preferential system, and output a request of changing the image characteristics to those appropriate for the operation of said image processing means to video signals of at least one system other than the video signal of the preferential system.
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43. An image processing device, comprising at least one signal input unit to which video signals of a plurality of systems are inputted, a memory unit having a memory region for storing images of at least one screen, at least one image display signal output unit, image processing means for synthesizing the video signals of said plurality of systems on said memory unit to output it to said signal output unit, and control means for controlling said image processing means,
wherein said control means, having communication means for outputting a request of changing image characteristics to at least one input video signal of said plurality of systems, select a preferential video signal according to image characteristic information of the video signals of said plurality of systems, arrangement conditions for a screen on which the video signals of said plurality of systems are output to said signal output unit, and characteristic information of image display units connected to said signal output unit, change the operation of said image processing means to one appropriate for the video signal of the preferential system and the image display units connected to said signal output unit, and output a request of changing the image characteristics to those appropriate for the operation of said image processing means to video signals of at least one system other than the video signal of the preferential system.
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53. An image processing device, comprising input system image processing units for adjusting image qualities of a plurality of input systems, a memory unit having a memory region for storing images of at least one screen, a memory control unit for performing a write or readout operation of image data to or from the memory unit and for synthesizing images of a plurality of input systems to a single screen to output the signal, an output system image processing unit for adjusting image quality of the synthesized signal and for outputting it as an image display output, and an image quality control unit for controlling said input system image processing units and said output system image processing unit and for outputting the image display signal,
further comprising means for outputting a request for setting or re-setting input image signals to signal sources for inputting signals to said plurality of input system signal processing units and means for outputting a request for changing characteristics of the input image appropriate for the synthesized correction characteristic to an arbitrary input signal source which has not been selected for synthesization with the correction characteristic for the display characteristic of an image display unit connected to the image quality control unit out of the correction characteristics for the images of said plurality of input systems, wherein said image quality control means, having correction characteristics for images of said plurality of input systems and a correction characteristic for the display characteristic of the image display unit, select one of the correction characteristics for the images of said plurality of input systems and convert it to a correction characteristic synthesized with the correction characteristic for the display characteristic of the image display unit for batch-processing in said output system image processing unit.
Specification