Television – Format conversion
Patent
1994-09-12
1996-02-20
Groody, James J.
Television
Format conversion
348450, 348458, H04N 701, H04N 521, H04N 514
Patent
active
054933382
ABSTRACT:
A method and apparatus is provided for increasing scanning line numbers for TV video signal utilizing a three dimensional medial filter. The method and apparatus inhibit the picture quality from being deteriorated due to a vertical resolution decreasing, shimmering and step edge phenomenon and the like occurring at the intra-field interpolation system, inter-field interpolation system and motion adaptive interpolation system which are conventional scanning line number increasing systems that increase TV scanning line number. The method and apparatus includes a three dimensional median filter which applies a weighing factor to pixel components of horizontal, vertical and diagonal directions of pixel component's periphery to be interpolated by the horizontal, vertical and time axis judging signals, and which can be applied for increasing the scanning line numbers of the luminance signal or the chrominance signal in an improved definition television IDTV receiver or an extended definition television EDTV receiver.
REFERENCES:
patent: 5070394 (1991-12-01), Kobayuashi
patent: 5168358 (1992-12-01), Ishizu et al.
Burgess Glenton B.
Goldstar Co. Ltd.
Groody James J.
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