Multiple screen digital video display
First Claim
1. A method for producing display signals, from video signals, for application to a monitor, for the displaying on said monitor of a partial image that is formed by only a portion of the information of said video signals, said video signals containing successively occurring video field data of first and second interlaced fields of a full image, video data of each field comprising successively occurring video line data corresponding to successive scan lines of the respective field;
- said method comprising;
writing said video signals in a memory for storing therein at least a portion of the video line data of each said field, andreading said memory to produce said display signals,said step of reading comprising sequentially reading video line data from said memory corresponding to at least portions of determined scan lines of the full image a plurality of times for each of said fields while omitting the reading of video line data for determined scan lines of said display signals, whereby the physical relationship of the lines of the first and second fields is maintained in said partial image.
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Accused Products
Abstract
A method and apparatus for displaying an interlaced image on a plurality of display screens in which the lines of two fields of the image are replicated a plurality of times in a memory to produce an enlarged image but determined lines are not read out of the memory for the production of the display screen signals, in order to maintain the original spatial relationship between the lines of the two fields. The addressing of the memory may be varied in order to obtain various special effects in the image on the display screen.
116 Citations
19 Claims
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1. A method for producing display signals, from video signals, for application to a monitor, for the displaying on said monitor of a partial image that is formed by only a portion of the information of said video signals, said video signals containing successively occurring video field data of first and second interlaced fields of a full image, video data of each field comprising successively occurring video line data corresponding to successive scan lines of the respective field;
- said method comprising;
writing said video signals in a memory for storing therein at least a portion of the video line data of each said field, and reading said memory to produce said display signals, said step of reading comprising sequentially reading video line data from said memory corresponding to at least portions of determined scan lines of the full image a plurality of times for each of said fields while omitting the reading of video line data for determined scan lines of said display signals, whereby the physical relationship of the lines of the first and second fields is maintained in said partial image. - View Dependent Claims (2, 3, 4, 5, 6, 14, 15, 18, 19)
- said method comprising;
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7. An apparatus for producing display signals, from video signals, for producing an image that contains only a portion of the image information of said video signals, wherein said video signals contain successively occurring video field data of first and second interlaced fields of a full image, the video data of each field comprising successively occurring video line data corresponding to successive scan lines of the respective fields;
- said apparatus comprising;
memory means, means applying said video signals to said memory means for storing therein at least a portion of the video line data of each said field, and means for reading said memory means to produce said display signals, said reading means comprising means for sequentially reading video line data corresponding to determined scan lines of the full image a plurality of times for each of said fields while omitting the reading of video line data corresponding to determined scan lines of said display signals, whereby the physical relationship of the scan lines of the first and second fields is maintained in said first mentioned image. - View Dependent Claims (8, 9, 10, 11, 16, 17)
- said apparatus comprising;
- 12. A method for enlarging an image on a display device in response to video signals, wherein said video signals contain successively occuring video field data of first and second interlaced fields, the video data of each field comprising successive video scan line data corresponding to successive scan lines of the respective fields, said method comprising selecting a given group of scan lines of each of said fields, replicating the video data of the selected lines of each of said fields each at a plurality of first locations in a memory while leaving determined second locations free of video data, and reading said first and second memory locations in a sequence to maintain the physical relationship between video lines of said first and second fields on said display device.
Specification