Method for and system of decoding compressed continuous-tone dig

Details Method for and system of decoding compressed continuous-tone dig Method for and system of decoding compressed continuous-tone dig

1993-08-17

1994-12-06

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358433, 348568, H04N 140

Patent

active

053716116

ABSTRACT:
For decoding compressed digital image data of source image, end-of-block (EOB) codes appearing in entropy coded data are utilized to detect a portion of "0" elements in a frequency range coefficient matrix. An inverse orthogonal transform process is fully or partly omitted according to the "0" coefficient distribution.

REFERENCES:
patent: 4985766 (1991-01-01), Morrison et al.
Ohta & Koga-Adaptive VWL Coding of Transform Coefficients for Sub-Primary Rate Video Transmission-pp. 8.5.1-8.5.5.
Kim Ngan-Image Display Techniques Using the Cosine Transform-pp. 173-177-IEEE, vol. Assp 32, Feb. 84.

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