2. A method of claim 1 wherein: representing the respective uncertainties of acoustic coverage in a manner that allows for efficient computation includes: accumulating an inverse of independent uncertainties of acoustic coverage for multiple speech utterances by the first speaker and for multiple speech utterances by the second speaker; transforming accumulated inverses of the independent uncertainties of acoustic coverage; and discarding dependencies between the uncertainties of different sounds represented in the transformed accumulated inverses to produce respective diagonalized, transformed accumulated inverses; and computing the score includes using the respective diagonalized, transformed accumulated inverses.
1. A method of speaker recognition in a speaker recognition system, the method comprising: by a processor, estimating respective uncertainties of acoustic coverage of at least one speech utterance by a first speaker and at least one speech utterance by a second speaker, the acoustic coverage representing respective sounds used by the first speaker and by the second speaker when speaking; by the processor, representing the respective uncertainties of acoustic coverage in a manner that allows for efficient memory usage by discarding dependencies between uncertainties of different sounds for the first speaker and for the second speaker to improve speaker recognition performance of the processor; by the processor, representing the respective uncertainties of acoustic coverage in a manner that allows for efficient computation by representing an inverse of the respective uncertainties of acoustic coverage and then discarding the dependencies between the uncertainties of different sounds for the first speaker and for the second speaker to further improve the speaker recognition performance of the processor; and by the processor, computing a score between the at least one speech utterance by the first speaker and the at least one speech utterance by the second speaker in a manner that leverages the respective uncertainties of the acoustic coverage during the comparison, the score being indicative of a likelihood that the first speaker and the second speaker are the same speaker.