Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1986-03-24
1988-05-17
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 13, 358260, H04N 1106, H04N 712
Patent
active
047454733
ABSTRACT:
A bandwidth reduction system which encodes images without significant degradation of edge information. A PCM encoded signal, which may be an image generated by the sampling of a video signal or of other format is separated into two channels in which the upper bit plane is processed in one channel by an entropy preserving encoding process and the lower bit planes are processed in the other channel by a nonentropy preserving encoding process. The resultant signals are recombined to reconstitute each sample into a multibit PCM signal with reduced bandwidth which retains significant edge information.
REFERENCES:
patent: 4096526 (1978-06-01), Furuta
patent: 4096527 (1978-06-01), Furuta
patent: 4124870 (1978-11-01), Schatz et al.
patent: 4266249 (1981-05-01), Chai et al.
patent: 4344086 (1982-08-01), Mizuno
patent: 4420771 (1983-12-01), Pirsch
patent: 4476495 (1984-10-01), Fujisawa et al.
patent: 4520506 (1985-05-01), Chan et al.
patent: 4546385 (1985-10-01), Anastassiou
patent: 4597010 (1986-06-01), Carr
patent: 4651193 (1987-03-01), Catros
patent: 4672441 (1987-06-01), Hoelzlwimmer et al.
"Adaptive Quantization of Picture Signals Using Spatial Masking", A. N. Netravali and B. Prasada, Pro. IEEE, vol. 65, pp. 536-548, Apr. 1977.
"A Nonlinear Model for the Spatial Characteristics of the Human Visual System", C. F. Hall and E. L. Hall, IEEE Trans. Systems, Man and Cybernetics, vol. SMC-7, No. 3, pp. 161-170, Mar. 1977.
"Image Coding by Linear Transformation and Block Quantization", A. Habibi and P. A. Wintz, IEEE Trans. Commun. Tech., vol. COM-19, No. 1, pp. 50-62, Jan. 1971.
"Picture Coding", A Review, A. N. Netravali and J. O. Limb, Proc. IEEE, vol. 68, No. 3, pp. 366-406, Mar. 1980.
"Image Data Compression: A Review", A. K. Jain, Proc. IEEE, vol. 69, No. 3, pp. 349-389, Mar. 1981.
"Quantizing for Minimum Distortion", J. Max, IRE Trans. Info. Th., vol. IT-6, No. 1, pp. 7-12, Mar. 1960.
Groody James J.
Harris Corporation
Kostak Victor R.
LandOfFree
Hybrid image compression system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hybrid image compression system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid image compression system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1884832