Double picture producing apparatus for wide screen television

Details Double picture producing apparatus for wide screen television Double picture producing apparatus for wide screen television

1996-02-09

1998-02-03

Burgess, Glenton B.

Television

Basic receiver with additional function

For display of additional information

348561, 348588, 348704, H04N 545

Patent

active

057150133

ABSTRACT:
An improved double picture producing apparatus for a wide screen television capable of concurrently achieving an aspect ratio conversion and a double picture display using a picture zooming up function of an aspect ratio conversion, which includes a clock generating unit for receiving a horizontal synchronous signal and for outputting a writing clock signal, a reading clock signal, and a mode selection signal; a decimating unit for counting the writing clock signal outputted from the clock generating unit and for outputting a writing address and a reading address in accordance with a mode selection signal; a double picture video signal generating unit for receiving a first video signal and a second video signal which are aspect-ratio-converted by the first and second zooming units and for outputting a video signal of a double picture by dividing the number of scanning lines of the video signals in half; and a video signal selection unit for receiving first and second video signals aspect-ratio-converted by the first and second zooming units and a double picture video signal outputted from the double picture video signal generating unit, and for outputting the signals to a color picture tube in accordance with a mode selection signal.

REFERENCES:
patent: 4862269 (1989-08-01), Sonoda et al.
patent: 5404177 (1995-04-01), Imai et al.
patent: 5504538 (1996-04-01), Abe
patent: 5576769 (1996-11-01), Lendaro

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