Temporal decorrelation method for robust speaker verification

A temporal decorrelation method for speaker voice verification, comprising the steps of:

• collecting into a plurality of input vectors a verification utterance from an unknown speaker claiming a specific identity;
• transforming said plurality of input vectors using a temporal decorrelation transformation to establish a word-level speech feature vectors thereby creating whole-word vectors which are statistically uncorrelated over entire words with said utterance;
• retrieving previously stored word-level speech feature vectors known to belong to a speaker with said specific identity;
• scoring said word-level speech feature vectors generated during said step of establishing with said previously stored word-level speech feature vectors;
• and
• determining whether said unknown speaker is said speaker with said specific identity.

A temporal decorrelation method for reducing the amount of storage necessary for speaker specific speech information, comprising the steps of:

• establishing word-level speech feature vectors having a dimension from a spoken utterance;
• reducing the dimension of said word-level speech feature vectors by applying a temporal decorrelation linear transformation to said word-level feature vectors;
• and
• storing said word-level feature vectors.