Picture-in-picture television receiver

Details Picture-in-picture television receiver Picture-in-picture television receiver

1987-01-05

1988-03-01

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5272

Patent

active

047290277

ABSTRACT:
According to the invention, there is provided a so-called picture-in-picture type television receiver in which a sub-picture screen is displayed within a main picture screen in a picture-in-picture fashion. When a picture based on a base band video signal from an external source such as a VTR, for example, is displayed on the sub-picture screen, if the sub-picture channel selecting means is then operated, the picture of a broadcast television channel is then automatically displayed on the sub-picture screen. This feature allows the omission of a video signal source switching means for the sub-picture, thus protecting the viewer from being confused when using the controls of the television receiver.

REFERENCES:
patent: 4070695 (1978-01-01), Scholz et al.
patent: 4139860 (1979-02-01), Micic et al.
patent: 4238773 (1980-12-01), Tsuboka et al.
patent: 4266242 (1981-05-01), McCoy
patent: 4267560 (1981-05-01), Ishikawa et al.
patent: 4278993 (1981-07-01), Suzuki
patent: 4621259 (1986-11-01), Schepers et al.
patent: 4636864 (1987-01-01), Annegarn et al.
patent: 4665438 (1987-05-01), Miron et al.
patent: 4682234 (1987-07-01), Naimpally
TV Receiver Puts Two Pictures on Screen at Same Time, by Manfred Ullrich and Max Hegendoerfer, Electronics/Sep. 1, 1977.
Fully Digitalized Color Picture in Picture Television System, by Michio Masuda et al., IEEE Transactions on Consumer Electronics, vol. CE-25, Feb. 1979.

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