Television system with improved definition in field scanning dir

Facsimile and static presentation processing – Static presentation processing – Attribute control

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Details

358 14, H04N 1106

Patent

active

046529047

ABSTRACT:
A television system with enhanced definition in the field scanning direction is presented. In the information transmitter a video signal source is coupled directly and via line delay device with a subtraction circuit followed by a modulator with a subcarrier. An adding circuit is coupled with the output of the modulator and the source, possibly via the delay device. The resultant difference information is transmitted frequency-interleaved with the video information under control of a movement detector, to the information receiver. The receiver contains a filter circuit for separating the information. The modulated subcarrier goes via a demodulator to a superposition circuit to which further the video information is also supplied. The output of the superposition circuit is connected via a line delay device to one input of a switch-over circuit. The video information is supplied to a second input of the switch-over circuit. The supplied information on said first and second inputs is passed on by the switch-over circuit during alternate line periods. The result is an improvement of picture definition upon display in the field scanning direction.

REFERENCES:
patent: 4429327 (1984-01-01), Oakley et al.
patent: 4473837 (1984-09-01), Tiemann
patent: 4476484 (1984-10-01), Haskell
patent: 4485401 (1984-11-01), Tan et al.
patent: 4521803 (1985-06-01), Gittinger

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