Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-10-15
1992-10-13
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358135, H04N 7133
Patent
active
051555921
ABSTRACT:
An image signal (V1) is transform coded in a Discrete cosine Transform Coder (DCT) and the output coefficients thus provided are encoded in a zonal encoder (QZ). The output of QZ is inversely coded (IQZ) and substracted from the coefficients of the DCT. The resulting error is encoded in an entropy encoder. Both the zonal coder and the entropy encoder have quality inputs (TZQ, TEQ) controlling the compression factor, and have their outputs combined in a single compressed data stream (TXD3).
REFERENCES:
patent: 4933762 (1990-06-01), Guichard, et al.
patent: 4982282 (1991-01-01), Saito
patent: 4984076 (1991-01-01), Watanabe
patent: 5001559 (1991-03-01), Gonzales
patent: 5006931 (1991-04-01), Shirota
patent: 5047852 (1991-09-01), Hanyu
patent: 5049990 (1991-09-01), Kondo
patent: 5063608 (1991-11-01), Siegel
Wang et al, "Progressive Image Transmission by Transform Coefficient Residual Error Quantization", IEEE Trans Communications, vol. 36 #1, Jan. 1988, pp. 75-87.
Gonsalves et al, "Bounded-error coding of cosine transformed images", Proc Soc Photo-Optical Instr Engrs (SPIE) vol. 207, Aug. 1979, pp. 291-298.
Shri K. Goval et al: "Entropy Coded Differential Pulse-Code Modulation Systems for Television" IEEE Transactions on Communications Jun. 1975, pp. 660-666.
Wen-Chen et al: "Adaptive coding of Monchrome and Color Images", IEEE Transactions on Communications, vol. Com-25, No. 11, Nov. 1977.
Van der Putten Frank O.
Verbiest Willem J. A.
Voeten Bart F.
ALCATEL N.V.
Britton Howard W.
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