Facsimile and static presentation processing – Facsimile – Picture signal generator
Patent
1991-11-22
1993-08-10
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Picture signal generator
358433, 358442, 358445, 358455, 358456, 358457, 358468, H04N 104
Patent
active
052354326
ABSTRACT:
A video-to-facsimile signal converter includes means for receiving and converting a video signal representing a continuous tone video image to a facsimile signal for transmission to and reception by a facsimile receiver for simulation of the continuous tone video image. An analog-to-digital converter receives and converts an analog video signal to digital video data which is captured by a video data two-field buffer. A digital signal processor, in conjunction with a memory look-up table, processes the captured video data by: interpolating the video data from the video resolution up to a higher facsimile resolution; selectively enhancing the image by sharpening image edges; precompensating the interpolated video data by altering its contrast transfer function; and dithering the interpolated and precompensated video data to produce video pel data blocks which correspond to the original video pixel data blocks and have similar composite gray-scale values. A facsimile encoder then encodes the interpolated, precompensated and dithered video data in accordance with the CCITT Group 3 facsimile standard. A MODEM and data access arrangement couple the facsimile-encoded signal onto a telephone line for transmission to and reception by a facsimile receiver for simulating the original continuous tone video image.
REFERENCES:
patent: 4514767 (1985-04-01), Kubota et al.
patent: 4720849 (1988-01-01), Tayama
patent: 4802008 (1989-01-01), Walling
patent: 4979028 (1990-12-01), Minematsu et al.
patent: 5067019 (1991-11-01), Juday et al.
Creedon Brendan G.
Katz Lou
Coles Sr. Edward L.
Grant II Jerome
LandOfFree
Video-to-facsimile signal converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video-to-facsimile signal converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video-to-facsimile signal converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1729676