Method of and circuit for processing a picture signal

Details Method of and circuit for processing a picture signal Method of and circuit for processing a picture signal

1989-08-23

1991-03-19

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, H04N 701, H04N 1120

Patent

active

050015630

ABSTRACT:
In a picture signal processing circuit including an interpolation filter having a median filter (67) having a first input (63), a second input (69) and a third input (63) to which respective signals from picture elements of three positionally consecutive lines from a preceding and a present field of a line and field-sequentially assembled picture signal are applied, it has been found that a better result can be obtained for moving contours in the picture signal by taking a (weighted) average from these signals of the present field, and to take this average instead of or mixed with an output signal (Y') of the median filter (67).

REFERENCES:
patent: 4636857 (1987-01-01), Ashiha et al.
patent: 4785351 (1988-11-01), Ishikawa
"A Practical IDTV System Improving Picture Quality for Nonstandard TV Signals" by Kurita et al; IEEE Transactions on Consumer Electronics, vol. 34, No. 3, Aug. 1988, pp. 387-395.
"Integrated Digital IDTV Receiver with Features" by Nainipally et al; IEEE Transactions on Consumer Electronics, vol. 34, No. 3, Aug. 1988, pp. 410-419.
"Integrated Digital IDTV Receiver with Features" by Naimpally et al; IEEE 1988 International Conference on Consumer Electronics, Jun. 8-10, 1988, pp. 76-77.

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