Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2006-08-15
2006-08-15
Gaffin, Jeffrey (Department: 2165)
Data processing: database and file management or data structures
Database design
Data structure types
C382S232000
Reexamination Certificate
active
07092965
ABSTRACT:
A system providing methods for improved compression of images that have been compressed using Discrete Cosine Transform (DCT) based compression is described. A digital image that has been compressed using DCT based compression, such as an image compressed using the Joint Photographic Experts Group (JPEG) compression scheme, is received and partially decompressed to generate DCT coefficients of the image. The decoded coefficients of the image are then rearranged to aggregate like frequencies together. After rearrangement, the image is recompressed using a wavelet-based compression scheme.
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Blakeley Sokoloff Taylor & Zafman LLP
Gaffin Jeffrey
LightSurf Technologies, Inc.
Szepesi Judith A.
Wu Yicun
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