Method and system of electronic image storage and display
First Claim
1. A method of operating a system to display an image on a raster scan TV display wherein an incoming signal comprises a sequence of scan lines whose line rate is lower than the horizontal TV line rate within a field of the TV display, the method comprising:
- selecting an incoming signal line rate to be an integer submultiple of the horizontal TV line rate; and
during each scan line of the incoming signal;
applying the incoming signal to a scan converter having a memory therein and storing the incoming signal in segments in the memory by writing each segment into the memory during the time required to scan one horizontal TV line in the field; and
scanning the memory and displaying the signal stored therein on the TV display by reading from the memory during the time required to scan the next horizontal TV line in the field to thereby write and read during alternate horizontal TV lines.
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Accused Products
Abstract
A method and system of electronic image storage and display wherein the display is viewed on a raster scan TV display and the incoming signal comprises a sequence of scan lines whose line rate is lower than that of the horizontal TV line rate and is an integer submultiple, preferably even, thereof. The incoming signal is stored in the memory of a scan converter and the stored image is scanned and displayed on a conventional television raster scan display.
The scan converter mode is alternated between read and write such that the writing is carried out during the time required to scan one horizontal TV line in the field and the reading is carried out during the time required to scan the next horizontal TV line in the field to thereby write and read during alternate horizontal TV lines.
To produce a spatially uniform raster, the horizontal TV lines of succeeding TV fields are offset by one line from the horizontal TV lines of the preceding field.
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Citations
44 Claims
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1. A method of operating a system to display an image on a raster scan TV display wherein an incoming signal comprises a sequence of scan lines whose line rate is lower than the horizontal TV line rate within a field of the TV display, the method comprising:
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selecting an incoming signal line rate to be an integer submultiple of the horizontal TV line rate; and during each scan line of the incoming signal; applying the incoming signal to a scan converter having a memory therein and storing the incoming signal in segments in the memory by writing each segment into the memory during the time required to scan one horizontal TV line in the field; and scanning the memory and displaying the signal stored therein on the TV display by reading from the memory during the time required to scan the next horizontal TV line in the field to thereby write and read during alternate horizontal TV lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a system to display an image on a raster scan TV display wherein an incoming signal comprises a sequence of scan lines whose line rate is lower than the horizontal line rate within a field of the TV display, the method comprising:
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selecting an incoming signal line rate to be an integer submultiple of the horizontal TV line rate; and during each scan line of the incoming signal; applying the incoming signal to a scan converter having an electronic storage tube therein and storing the incoming signal in segments in the electronic storage tube by writing each segment into the electronic storage tube during the time required to scan one horizontal TV line in the field; and scanning the electronic storage tube and displaying the signal stored therein on the TV display by reading from the electronic storage tube during the time required to scan the next horizontal TV line in the field to thereby write and read during alternate horizontal TV lines. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. In a system of electronic image storage and display having a scan converter with a memory therein and a raster scan TV display wherein an incoming signal comprises a sequence of scan lines whose line rate is lower than the horizontal TV line rate within a field of the TV display, the improvement comprising:
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means for selecting an incoming signal line rate to be an integer submultiple of the horizontal TV line rate; means for applying the incoming signal to the scan converter and storing the incoming signal in the memory by writing each segment into the memory during the time required to scan one horizontal TV line of the field; and means for scanning the memory and displaying the signal stored therein on the TV display by reading from the memory during the time required to scan the next horizontal TV line in the field during each scan line of the incoming signal to thereby write and read during alternate horizontal TV lines of the same field during each scan line of the incoming signal. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification