Television circuit for use on signal recording and signal display, respectively
First Claim
1. A television circuit for use on signal recording and display, respectively, the circuit comprising a signal correction circuit for obtaining an optimum picture on display, corrections being made in subregions arranged in columns and rows, of a picture which corresponds with a scene to be recorded and displayed, this picture being converted, on signal recording as a potential image, into a picture signal by means of a line-by-line and field-by-field scan and being formed on signal display by means of the picture signal by means of a line-by-line and field-by-field scan, respectively, the television circuit including a memory whose memory locations containing correction information correspond to the sub-regions which each have their scanning lines, the memory being connected to the signal correction circuit by means of a correction-information carrying output, characterized in that in addition to the memory locations containing the signal correction information for the subregions of the picture, the memory comprises further memory locations, namely a first further memory location for each column of subregions, each first further memory location containing absolute correction information for all subregions in the column and relative difference information being present in each said memory location corresponding with a subregion in the column, each relative difference information providing, for each subregion, a correction information for each scanning line in the subregion, which is valid with respect to the preceding scanning line.
1 Assignment
0 Petitions
Accused Products
Abstract
Television circuit comprising a signal correction circuit which is active on signal recording and display, respectively, to obtain an optimum picture on display, and comprising a memory, memory-location (RC) containing correction information of which correspond to picture subregions (RC), each having their scanning lines (H1-H16), these subregions (RC) having been arranged in a matrix of rows and columns. According to the invention the memory comprises further memory locations (HOC) namely a first, further memory location (HOC1-HOC7) for each column of subregions, absolute correction information being present in each first further memory location for all subregions in the column and relative difference information being present in each memory location (R1C1-R19C7) corresponding to a subregion in the column, each relative difference information per subregion furnishing a correction information for each scanning line in the subregion which information is valid with respect to the preceding scanning line. At a linearity correction of, for example, the horizontal line scan a more or less vertical, shifted, curved information line 4 can be corrected to form a vertical, straight line 3 in the exact position, by means of, for example, an absolute correction from a point 41 to a point 31 and a relative difference correction over sixteen scanning lines H, across the distance difference in the direction of line scan between the points 41 and 42, 42 and 43, etc.
35 Citations
16 Claims
- 1. A television circuit for use on signal recording and display, respectively, the circuit comprising a signal correction circuit for obtaining an optimum picture on display, corrections being made in subregions arranged in columns and rows, of a picture which corresponds with a scene to be recorded and displayed, this picture being converted, on signal recording as a potential image, into a picture signal by means of a line-by-line and field-by-field scan and being formed on signal display by means of the picture signal by means of a line-by-line and field-by-field scan, respectively, the television circuit including a memory whose memory locations containing correction information correspond to the sub-regions which each have their scanning lines, the memory being connected to the signal correction circuit by means of a correction-information carrying output, characterized in that in addition to the memory locations containing the signal correction information for the subregions of the picture, the memory comprises further memory locations, namely a first further memory location for each column of subregions, each first further memory location containing absolute correction information for all subregions in the column and relative difference information being present in each said memory location corresponding with a subregion in the column, each relative difference information providing, for each subregion, a correction information for each scanning line in the subregion, which is valid with respect to the preceding scanning line.
Specification