Associative memory

Details Associative memory Associative memory

2005-10-03

2008-10-07

Ellis, Kevin (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

07433997

ABSTRACT:
A computer-implemented method of realizing an associative memory capable of storing a set of documents and retrieving one or more stored documents similar to an inputted query document, said method comprising: coding each document or a part of it through a corresponding feature vector consisting of a series of bits which respectively code for the presence or absence of certain features in said document; arranging the feature vectors in a matrix; generating a query feature vector based on the query document and according to the rules used for generating the feature vectors corresponding to the stored document s such that the query vector corresponds in its length to the width of the matrix; storing the matrix column-wise; for those columns of the matrix where the query vector indicates the presence of a feature, bitwise performing one or more of preferably hardware supported logical operations between the columns of the matrix to obtain one or more additional result columns coding for a similarity measure between the query and parts or the whole of the stored documents; and said method further comprising one or a combination of the following: retrieval of one or more stores documents based on the obtained similarity measure; and or storing a representation of a document through it s feature vector into the above matrix.

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patent: 2002/0023085 (2002-02-01), Keith, Jr.
patent: 2002/0129015 (2002-09-01), Caudill et al.

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