Television receiver with non-linear processing selectively disabled during display of multi-image video signal
US5548341A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Aug 5, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/45
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.