05315670 is referenced by 152 patents and cites 6 patents.

A data processing system augments compression of non-zero values of significant coefficients by coding entries of a significance map independently of coding the values of significant non-zero coefficients. A dedicated symbol represents a zerotree structure encompassing a related association of insignificant coefficients within the tree structure, thereby compactly representing each tree of insignificant coefficients. The zerotree symbol represents that neither a root coefficient of the zerotree structure nor any descendant of the root coefficient has a magnitude greater than a given reference level. The zerotree structure is disclosed in the context of a pyramid-type image subband processor together with successive refinement quantization and entropy coding to facilitate data compression.

Title
Digital data compression system including zerotree coefficient coding
Application Number
7/790860
Publication Number
5315670
Application Date
November 12, 1991
Publication Date
May 24, 1994
Inventor
Jerome M Shapiro
Philadelphia
PA, US
Agent
Ronald H Kurdyla
Eric P Herrmann
Joseph S Tripoli
Assignee
General Electric Company
NJ, US
IPC
G06K 9/00
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