Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-01-21
1993-01-12
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358142, 358140, 358 12, H04N 704
Patent
active
051794438
ABSTRACT:
A wide aspect signal is band-width limited in the vertical spatial frequency by a V-LPF. The wide aspect signal is band-width limited along the temporal spatial frequency and in the vertical and horizontal spatial frequency by a 1/60-sec delay unit, an adder, 1 1/60-sec delay unit, a selector, a V-LPF, and an H-LPF. A motion image signal can be obtained by an adder. A still image signal can be obtained by the selector. The motion and still image signals are mixed by a mixer in accordance with an image motion amount. An output from the substractor is processed by a vertical shifter, an H-LPF, and a 6.fwdarw.5 converter to provide a still image compensation signal Vh. A signal from the V-LPF is compressed in the vertical direction by a 6.fwdarw.5 converter so as to be a center portion signal which can be displayed as an image with the receiver of the existing television system, and supplied to a selector. An output signal from the 6.fwdarw.5 converter is processed by an LD generator to generate a motion image compensation signal (LD signal). The LD and Vh signals are selectively output from a mixer in accordance with the image motion. A compensation signal output from the mixer is processed by an H-LPF, a 1/5-time compressor, and a rearranging unit, so that it can be multiplexed on upper and lower black bar portions formed on upper and lower portions of the center panel, and supplied to the selector.
REFERENCES:
patent: 4845562 (1989-07-01), Koslov
patent: 4979020 (1990-12-01), Isnardi
patent: 4985769 (1991-01-01), Yasumoto
S. Yasuki et al. ITEJ Technical Report, vol. 13, No. 41, pp. 19-24, BCS'89-4; Aug. 31, 1989 "A Study of Multiplexing Technique for Widening Aspect-Ratio".
M. Kageyama et al.; ITEJ Technical Report, vol. 13, No. 41, pp. 37-42, BCS'89-7; Sep. 1, 1989 "A Scheme for Improving Vertical Frequency Characteristics of Letter-Box Method".
Kawai Kiyoyuki
Kimata Yoshihide
Ogawa Yoshihiko
Sugimori Yoshio
Yasuki Seijiro
Groody James J.
Hsia Sherrie
Kabushiki Kaishi Toshiba
Nippon Television Network Corp.
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