Patent ID: 11929077
Assignee: DTS, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A method for matching a speaker in a multi-stage enrollment voice authentication or identification system, comprising:
capturing a plurality of speech samples from the speaker during an enrollment process,
categorizing the plurality of speech samples into the following sentence types: (1) a declarative sentence; (2) an imperative sentence; (3) an interrogative sentence; (4) an exclamatory sentence;
computing feature-space representations for each of the sentence types, wherein a boundary is determined for the feature-space representations for each of the sentence types;
generating an enrollment voiceprint for the speaker by aggregating the features-space representations using at least two different categorized sentence types to obtain a speaker enrollment voiceprint, wherein the aggregated feature-space representations have a modified boundary;
associating the speaker enrollment voiceprint with information about the speaker gathered during enrollment;
inputting an input audio signal containing speech samples of the speaker;
determining a target speech signal by identifying and retaining segments of the input audio signal that contain speech and identifying and discarding segments of the input audio signal which do not contain speech;
computing an authentication voiceprint for the speaker from the target speech signal and comparing the speaker authentication voiceprint to a set of one or more enrolled-user voiceprints corresponding to one or more enrolled users to obtain a comparison;
making an output determination based on the comparison to determine whether the speaker is a match with an enrolled user; and
making a decision based on whether the speaker is a match.