Image data processing system

Details Image data processing system Image data processing system

1994-11-18

1997-11-18

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358432, 358433, 348248, 348250, 348251, H04N 141, H04N 1415

Patent

active

056893469

ABSTRACT:
An Adaptive Discrete Cosine Transformation is widely used for orthogonally transforming image data. The number of adders necessary for sum-of-product operations in a matrix multiplication is reduced. A high speed matrix multiplication and a progressive image build-up are realized by minimizing the number of operations by skipping those for insignificant data. This invention speeds up the operations for restoring image data, minimizes the necessary circuit size, and enables a progressive image build-up to be performed efficiently.

REFERENCES:
patent: 4704628 (1987-11-01), Chen et al.
patent: 5045938 (1991-09-01), Sugiyama
patent: 5107345 (1992-04-01), Lee
patent: 5142380 (1992-08-01), Sakagami et al.
Hamilton, B., "Programmable architecture for matrix and signal processing", IEEE Region 5 Conference 1988, Mar. 21, 1988, pp. 116-120.
European Search Report, The Hague, Apr. 8, 1993.

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