Television scan line doubler including temporal median filter

Details Television scan line doubler including temporal median filter Television scan line doubler including temporal median filter

1989-04-05

1991-01-29

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, H04N 701

Patent

active

049890905

ABSTRACT:
A video pixel interpolator generates interpolation pixels from incoming picture image pixels for use within a television picture scan line doubler system. The interpolator includes a temporal median filter for generating an interpolation pixel by selection of the median one of a plurality of temporal pixel samples derived from incoming video, an intra-field averager means for generating an intra-field pixel average, and a switch connected to switch an input to a line doubler of the system between outputs of the temporal median filter and the intra-field averager in response to detection of pixel motion within the picture image. Improved motion detection, and multi-channel processing are also included within the present invention.

REFERENCES:
patent: 4400719 (1983-08-01), Powers et al.
patent: 4785351 (1988-11-01), Ishikawa
patent: 4791487 (1988-12-01), Kozuki et al.

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