Television receiver for selectively blocking video signal sample

Details Television receiver for selectively blocking video signal sample Television receiver for selectively blocking video signal sample

1990-10-01

1992-06-02

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358142, 358147, 358165, 358183, H04N 5445, H04N 704, H04N 7087

Patent

active

051192004

ABSTRACT:
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.

REFERENCES:
patent: 4233628 (1980-11-01), Ciciora
patent: 4568964 (1986-02-01), Doornheim
patent: 4595952 (1986-06-01), Filliman
patent: 4628479 (1986-12-01), Borg et al.
patent: 4633297 (1986-12-01), Skerlos
patent: 4894714 (1990-01-01), Christis
Bown et al., "Comparative Terminal Realizations With Alpha-Geometric Coding", IEEE Transactions on Consumer Electronics, vol. CE-26, Aug. 1980, pp. 605-617.

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