Method and apparatus for using histograms to product data...

Details Method and apparatus for using histograms to product data... Method and apparatus for using histograms to product data...

2006-12-28

2008-08-26

Pham, Chi H. (Department: 2616)

Multiplex communications

Diagnostic testing

C707S793000

Reexamination Certificate

active

07417954

ABSTRACT:
A system and method are provided for summarizing dynamic data from distributed sources through the use of histograms. In particular, the method comprises receiving a first data signal at a first location, determining a first array sketch of the first data signal, and constructing a first output histogram from the first array sketch and a first robust histogram via a first hybrid histogram. Array sketches of a number of data signals may be calculated, and added to yield a single vector sum. The histogram is constructed from the vector sum. In that way, the vector sum may be analyzed without revealing the individual data signals that form the basis of the sum.

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patent: 6760724 (2004-07-01), Chakrabarti et al.
patent: 2006/0007858 (2006-01-01), Fingerhut et al.

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