Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-03-13
1992-10-20
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 12, 358141, H04N 700
Patent
active
051574900
ABSTRACT:
A television signal scanning line converting apparatus, where an intra-frame average signal and inter-frame average signal are obtained by processing a progressive scanning signal in a unit of two frames with a delaying circuit and adders. A lowpass filter limits the horizontal and vertical bands of an intra-frame difference signal to reduce the field amount. If the input progressive scanning signal is a moving picture, the low vertical range of the intra-frame difference signal will be multiplexed to the high vertical range part of the intra-frame average signal and the high vertical range of the intra-frame difference signal will be transmitted separately so that the resolution of the moving picture will improve and no deterioration, caused by the turning distortion, will be produced.
REFERENCES:
patent: 4661850 (1987-04-01), Strolle et al.
patent: 4926244 (1990-05-01), Isnardi
patent: 4979020 (1990-12-01), Isnardi
patent: 5012326 (1991-04-01), Sakamoto et al.
patent: 5025309 (1991-06-01), Isnardi
SMPT Journal May 1984; M. Achiha et al "A Motion-Adaptive High-Definition Converter for NTSC Color TV Signal" pp. 470-476.
Kawai Kiyoyuki
Yasuki Seijiro
Groody James J.
Kabushiki Kaisha Toshiba
Oh Minsun
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