Television system

Details Television system Television system

H - Electricity

04

N

350/34

H04N 7/00 (2006.01) H04N 7/015 (2006.01)

Patent

CA 2032953

A television transmitting system transmits to a television screen having aspect ratio of 3:4 by providing no-picture portions in upper and lower sections of an oblong screen having aspect ratio different from the above. Auxiliary signals are inserted in the no-picture portions and are used as the signals for improving the resolution on the receiving side. A signal is obtained by shifting signal component, exceeding horizontal band determined by lateral width of the raster, to lower frequency and one of the following signals is transmitted at the same time: a. a signal obtained by shifting signal component in the band higher than vertical frequency determined by the number of scanning lines on vertical direction of oblong screen in the portion of the screen where picture is not moving; and b. a signal for difference between scanning lines instead of the signal on the above still picture by the control of the picture movement-detecting circuit in the portion of the screen where the picture is moving.

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