Television circuit for use on signal recording and signal displa

Details Television circuit for use on signal recording and signal displa Television circuit for use on signal recording and signal displa

1981-08-27

1984-09-25

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 534

Patent

active

044738447

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 4.sub.1 to a point 3.sub.1 and a relative difference correction over sixteen scanning lines H, across the distance difference in the direction of line scan between the points 4.sub.1 and 4.sub.2, 4.sub.2 and 4.sub.3, etc.

REFERENCES:
patent: 3902011 (1975-08-01), Pieters et al.

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