Patent ID: 8077994

Claim:
A computer-implemented method of compressing Modified Quadratic Discriminant Function (MQDF) data, comprising: identifying a plurality of eigenvectors, each eigenvector in the plurality of eigenvectors corresponding to a class in a plurality of classes, each class corresponding to a pattern to be recognized; splitting each eigenvector in the plurality of eigenvectors into a number of sub-vectors, wherein all eigenvectors in the plurality of eigenvectors are split into the same number of sub-vectors; grouping the sub-vectors into one or more groups, the sub-vectors being grouped according to a location of the sub-vectors within each of the eigenvectors such that each group in the one or more groups is associated with location data; and compressing at least two of the groups of the one or more groups to form compressed groups, each one of the at least two compressed groups being compressed according to a different codebook among multiple codebooks, each different codebook being specific to the group being compressed and identifiable via the location data for each compressed group.