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AssigneeBritish Telecommunications public limited company
InventorsMark Pawlewski, Aladdin Mohammad Ariyaeeinia, Perasiriyan Sivakumaran
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A method and apparatus for pattern recognition comprising comparing an input signal representing an unknown pattern with reference data representing each of a plurality of pre-defined patterns, at least one of the pre-defined patterns being represented by at least two instances of reference data. Successive segments of the input signal are compared with successive segments of the reference data and comparison results for each successive segment are generated. For each pre-defined pattern having at least two instances of reference data, the comparison results for the closest matching segment of reference data for each segment of the input signal are recorded to produce a composite comparison result for the said pre-defined pattern. The unknown pattern is the identified on the basis of the comparison results. Thus the effect of a mismatch between the input signal and each instance of the reference data is reduced by selecting the best segments from the instances of reference data for each pre-defined pattern.
A method of speaker recognition comprising comparing an input signal representing speech from an unknown speaker with reference data representing speech from each of a plurality of pre-defined speakers, at least one of the pre-defined speakers being represented by at least two instances of reference data, the method comprising:
Speaker recognition apparatus comprising:
Apparatus according to 13 wherein the comparison result D is the average of the weighted result for each closest matching segment i.e. D = 1 N ∑ n = 1 N w ( n ) d ( n ) ( 1 )
Dependencies are inferred from the claim text.