High efficienccy coding and decoding apparatus for lowering tran

Details High efficienccy coding and decoding apparatus for lowering tran High efficienccy coding and decoding apparatus for lowering tran

1991-07-17

1993-03-23

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 712

Patent

active

051969300

ABSTRACT:
In a high efficiency coding apparatus for performing plural different types of orthogonal transformation, by reordering the signals after orthogonal transformation and transforming into signals of same statistic characteristics, distortion of coding efficiency due to mismatching of the characteristics of coding device is reduced even if the output of the orthogonally transformed signal is coded by one fixed coding device.

REFERENCES:
patent: 4849812 (1989-07-01), Borgers et al.
patent: 5073820 (1991-12-01), Nakagawa et al.
"Scene Adaptive Coder", Wen-Hsiung Chen et al., IEEE Transactions On Communications vol. Com-32, No. 3, Mar. 1984, pp. 225-232.
"A Fast Algorithm for the Cosine Transform Based on Successive Order Reduction of the Tchebycheff Polynomial", Yoshitaka Morikawa et al., 1985/2 vol. J86-A No. pp. 173-179.

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