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    • 69. 发明申请
    • NOISE COMPENSATION IN SPEAKER-ADAPTIVE SYSTEMS
    • US20170221479A1
    • 2017-08-03
    • US15422583
    • 2017-02-02
    • Kabushiki Kaisha Toshiba
    • Javier LATORRE-MARTINEZVincent Ping Leung WanKayoko Yanagisawa
    • G10L15/20G10L15/16G10L15/07
    • G10L13/08G10L13/00G10L13/047G10L15/065G10L15/07G10L15/075G10L15/16G10L15/20G10L15/265
    • A method of adapting an acoustic model relating acoustic units to speech vectors, wherein said acoustic model comprises a set of speech factor parameters related to a given speech factor and which enable the acoustic model to output speech vectors with different values of the speech factor, the method comprising: inputting a sample of speech with a first value of the speech factor; determining values of the set of speech factor parameters which enable the acoustic model to output speech with said first value of the speech factor; and employing said determined values of the set of speech factor parameters in said acoustic model, wherein said sample of speech is corrupted by noise, and wherein said step of determining the values of the set of speech factor parameters comprises: (i) obtaining noise characterization parameters characterising the noise; (ii) performing a speech factor parameter generation algorithm on the sample of speech, thereby generating corrupted values of the set of speech factor parameters; (iii) using the noise characterization parameters to map said corrupted values of the set of speech factor parameters to clean values of the set of speech factor parameters, wherein the clean values of the set of speech factor parameters are estimates of the speech factor parameters which would be obtained by performing the speech factor parameter generation algorithm on the sample of speech if the sample of speech were not corrupted by the noise; and (iv) employing said clean values of the set of speech factor parameters as said determined values of the set of speech factor parameters.