Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1978-05-15
1980-04-01
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
364725, 358260, 375 28, H04N 712
Patent
active
041964489
ABSTRACT:
An image-compression system, wherein the image consists of a planar array of data points having various brightness levels, comprises a transmitter and a receiver. The transmitter comprises an analog-digital converter, for converting input analog data into digital data. The cosine transform is taken of the incoming digital data to transform the data representing various brightness levels into the frequency domain. The various frequency data points are differentially pulse code modulated, thereby removing line-to-line redundancy, the output data being in parallel form. Timing circuitry is provided for controlling the timing of the various circuits. Circuitry is provided in a receiver for the modulating or decoding of the output signal of the transmitter.
REFERENCES:
patent: 3920974 (1975-11-01), Means
patent: 4152772 (1979-05-01), Speiser et al.
A. Habibi, "Hybrid Coding of Pictorial Data" ARPA Quarterly Report, 6-1-70-1-73, pp. 34-75.
W. H. Chen et al., "A Fast Computational Algorithm for the Discrete Cosine Transform" 9-77, I.E.E.E. vol. com-25, No. 9 pp. 1004-1009.
R. Means, et al. "Television Encoding Using a Hybrid Discrete Cosine Transform and a Differential P.C.M. in Real Time" I.E.E.E., 1974 pp. NTC 74-61-66, Naval Undersea Center S.D. 92, 132.
W. F. Schreiber, "Picture Coding" I.E.E.E. vol. 55, No. 3, 3-67 pp. 320-330.
D. J. Connor, et al. "Intraframe Coding for Picture Transmission" I.E.E.E., vol. 60, No. 7, Jul. 19 72 pp. 779-791.
Habibi et al. "Real Time Image Redundancy Reduction Using Transform Coding Techniques" ARPA Quaterly Tech. Report 10-1-73, 1-8-74.
D. D. Buss et al. "Charge Transfer Device Development" ARPA Quarterly Tech. Report, 1-1-75, 12-31-75, pp. 1-64.
J. Speiser "High Speed Serial Access Implementation for Discrete Cosine Transforms" ARPA Tech. Report 10-1-73/ 1-8-74.
Means Robert W.
Speiser Jeffrey M.
Weber Allan G.
Whitehouse Harper J.
Wrench, Jr. Edwin H.
Coles Edward L.
Griffin Robert L.
Johnston Ervin F.
Sciascia Richard S.
Stan John
LandOfFree
TV bandwidth reduction system using a hybrid discrete cosine DPC does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with TV bandwidth reduction system using a hybrid discrete cosine DPC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TV bandwidth reduction system using a hybrid discrete cosine DPC will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1317406