U.S. Philips Corporation

Petrus J Van Den Hombergh

Herman J Schmitz

Lauens Doornheim

Jelle Polstra

Ronny M Schurmans

Adrianus C Tegenbosch

In a television receiver which comprises a video memory for noise reduction, large-area flicker reduction, still pictures and the like, an additional picture is generated by also storing its pixels in the video memory. The pixels of the additional picture are generated once by a pixel generator protected from being overwritten by the video signal applied at a field frequency of 50 hz by also storing a blanking bit for each pixel, preventing the pixel from being overwritten by the video signal. The additional picture may be, for example, a teletext page or an operating menu.

Television receiver for selectively blocking video signal samples via

Teletext decoder comprising a decoding circuit (45) and a memory medium (46) in which a reception indication is stored for the transmitted pages so as to indicate whether a requested page is present or not present in a transmitted cycle. The teletext decoder is adapted to determine the duration of the cycle at which the teletext pages are transmitted. It also determines the waiting time for a requested teletext page and to display it on the display screen of a television receiver via a character generator (47). The user is also informed of the occurrence of rotating pages and the reading time of such pages is displayed. The convenience of use of a television receiver with such a teletext decoder is thereby improved considerably.

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Eindhoven, Netherlands

Petrus J Van Den Hombergh