Image information compression device

Details Image information compression device Image information compression device

2008-03-11

2008-03-11

Tran, Phuoc (Department: 2624)

Image analysis

Image compression or coding

Adaptive coding

C382S248000, C382S251000, C382S261000

Reexamination Certificate

active

07343045

ABSTRACT:
This invention controls the code generation quantity adaptively with respect to the pattern of images and changes in the images, etc., so as to alleviate degradation in image quality, and to effectively reduce the spatial redundancy in order to provide a margin in the code quantity and to improve the overall image quality. An adaptive filter has a coefficient table memory that holds N coefficient tables, filter coefficients F1, F2. . . FNthat provide different filtering characteristics, a filter coefficient selecting46for selecting one filter coefficient Fkfrom filter coefficient tables and filter calculating unit performing prescribed calculations on the DCT coefficients using the selected filter coefficient FK.

REFERENCES:
patent: 5150432 (1992-09-01), Ueno et al.
patent: 5617135 (1997-04-01), Noda et al.
patent: 6763070 (2004-07-01), Lee
patent: 6944224 (2005-09-01), Zhao et al.

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