METHOD FOR GENERATING A VECTOR CODEBOOK, METHOD AND DEVICE FOR COMPRESSING DATA, AND DISTRIBUTED SPEECH RECOGNITION SYSTEM

摘要

A method for compressing data, said data being represented by an input vector having Q features, wherein Q is an integer higher than 1, the method for compressing data comprising the steps of 1) providing a vector codebook comprising sub-sets of indexed Q-feature reference vectors and threshold values associated with said sub-sets for a prefixed feature; 2) identifying a sub-set of reference vectors among said sub-sets by progressively comparing the value of a feature of the input vector - which corresponds to said prefixed feature - with the threshold values associated with said--sub-sets; 3) identifying the reference vector which - within the sub-set identified in step 2) - provides the lowest distortion with respect to the input vector.