Television receiver with non-linear processing selectively disab

Television – Basic receiver with additional function – For display of additional information

Patent

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Details

348380, 348674, H04N 5445, H04N 568, H04N 520

Patent

active

055483410

ABSTRACT:
A picture in picture (PIP) video signal is applied to a display device via a non-linear processor that is enabled during display of a main picture component and disabled during display of an inset picture component responsive to a PIP identification signal. The non-linear processor is formed in an integrated circuit which includes a pin for connection to a capacitor that stores peak levels of the PIP video signal. The PIP identification signal is subjected to a voltage level translation for varying the pin voltage over a range of values, .DELTA.V, for facilitating ON/OFF operation of the non-linear processor and is applied to a selected plate of the capacitor for varying the pin voltage without substantial alternation of charge stored within the capacitor whereby only a single pin is required for both capacitor storage and on/off control of the non-linear processor and undesirable visual artifacts, such as "trailing contrast bars", are avoided.

REFERENCES:
patent: 4549217 (1985-10-01), Sendelweck
patent: 5202763 (1993-04-01), Sendelweck et al.
patent: 5202765 (1993-04-01), Lineberry
patent: 5204748 (1993-04-01), Lagoni
patent: 5210606 (1993-05-01), Lagoni et al.

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