Raster manipulated television receiver

Details Raster manipulated television receiver Raster manipulated television receiver

H - Electricity

04

N

350/34

H04N 7/00 (2006.01) H04N 9/64 (2006.01)

Patent

CA 1153461

RASTER MANIPULATED TELEVISION RECEIVER ABSTRACT OF THE INVENTION A television receiver is disclosed for selectively displaying either a 525 line NTSC video signal or a 625 line European teletext or Viewdata signal. The receiver includes two vertical countdown circuits: a 626 line countdown circuit for use in generating an NTSC type raster, and a 625 line countdown circuit for use in generating a 625 line raster. Switch means are provided for selecting between the two signals generated by the countdown circuits. The receiver CRT uses self-converg- ing, in-line guns.

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