Color picture-in-picture television receiver

Details Color picture-in-picture television receiver Color picture-in-picture television receiver

H - Electricity

04

N

350/57

H04N 9/64 (2006.01) H04N 5/45 (2006.01)

Patent

CA 1132245

ABSTRACT OF THE DISCLOSURE A color picture-in-picture television receiver in which a reduced picture of one channel broadcast is inserted into a picture of another channel broadcast on a single screen. Three memories are provided for memorizing R-, G- and B-signals obtained from the first field of the video signals of the one channel broadcast. An-additional three memories are provided for memorizing R-, G- and B-signals obtained from the second field of the video signals of the one channel broadcast. One of the R-, G- and B-signals and the remaining two of the R-, G- and B-signals are written into the corresponding one of the three memories and the corresponding remaining two of the three memories during the first field by one train of writing pulses. Another train of writing pulses opposite to the one train in phase is provided. One of the R , G- and B-signals and the remaining two of the R-, G- and B-signals are written into the corresponding one of the other three memories and the corresponding remaining two of the other three memories during the second field by the other train of writing pulses and the one train of writing pulses, respectively.

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