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US 9,159,319 B1Granted
Keyword spotting with competitor models
AssigneeAmazon Technologies, Inc.
InventorBjorn Hoffmeister
Life of this patent
Estimating the term…
Abstract
Keyword spotting may be improved by using a competitor model. In some embodiments, audio data is received by a device. At least a portion of the audio data may be compared with a keyword model to obtain a first score. The keyword model may model a keyword. The portion of the audio data may also be compared with a competitor model to obtain a second score. The competitor model may model a competitor word, which may be a word that is similar to the keyword. The device may compare the first score and the second score to determine if a keyword is spoken.
Claims32
A system comprising:
- an electronic data store configured to store a keyword model that models a keyword and a competitor model that models a competitor word;
- and
- a user device in communication with the electronic data store, the user device configured to:
- receive a voice signal corresponding to a first utterance of a user;
- compute feature vectors using the voice signal;
- obtain a first score using the feature vectors and the keyword model, wherein the first score indicates a likelihood that the voice signal comprises the keyword;
- obtain a second score using the feature vectors and the competitor model, wherein the second score indicates a likelihood that the voice signal comprises the competitor word;
- determine that the voice signal comprises the keyword using the first score and the second score;
- and
- transmit information identifying the keyword and a portion of the voice signal that corresponds to the keyword to a server device, wherein the server device is configured to:
- perform speech recognition on the portion to obtain speech recognition results;
- generate, using the speech recognition results, a model, wherein the model is one of an updated keyword model, an updated competitor model, or a second competitor model;
- and
- transmit the generated model to the user device;
- and
- store the generated model in the electronic data store.
13 more elements
A computer-implemented method, comprising:
- as implemented by one or more computing devices configured with specific computer-executable instructions,
- receiving a voice signal corresponding to a first utterance;
- obtaining a first score using the voice signal and a keyword model, wherein the first score indicates a degree of similarity between the voice signal and a keyword;
- obtaining a second score using the voice signal and a competitor model, wherein the second score indicates a degree of similarity between the voice signal and a competitor word;
- determining that the voice signal comprises the keyword using the first score and the second score;
- and
- transmitting the keyword and a portion of the voice signal that corresponds to the keyword to a second device configured to perform speech recognition on the portion and configured to provide, based on the performed speech recognition, one of an updated keyword model or a second competitor model.
4 more elements
A non-transitory computer-readable medium comprising one or more modules configured to execute in one or more processors of a computing device, the one or more modules being further configured to:
- receive a voice signal corresponding to a first utterance;
- obtain a first score using the voice signal and a keyword model, wherein the first score indicates a degree of similarity between the voice signal and a keyword;
- obtain a second score using the voice signal and a competitor model, wherein the second score indicates a degree of similarity between the voice signal and a competitor word;
- determine that the voice signal comprises the keyword using the first score and the second score;
- and
- transmit the keyword and a portion of the voice signal that corresponds to the keyword to a second device configured to perform speech recognition on the portion and configured to provide a model based on the performed speech recognition.
3 more elements
A system comprising:
- a memory storing specific computer-executable instructions;
- and
- a processor configured to execute the specific computer-executable instructions, wherein execution of the specific computer-executable instructions by the processor causes the system to:
- receive, from a user device, a voice signal and a keyword identified by a keyword model as corresponding to the voice signal;
- perform speech recognition on the voice signal to obtain speech recognition results;
- determine that the speech recognition results do not comprise the keyword;
- and
- determine a competitor model, wherein the competitor model models a competitor word, and wherein the speech recognition results comprise the competitor word.
5 more elements
A computer-implemented method, comprising:
- as implemented by one or more computing devices configured with specific computer-executable instructions,
- receiving, from a user device, a voice signal and a keyword identified by a keyword model as corresponding the voice signal;
- performing speech recognition on the voice signal to obtain speech recognition results;
- determining that the speech recognition results do not comprise the keyword;
- and
- determining a competitor model, wherein the competitor model models a competitor word, and wherein the speech recognition results comprise the competitor word.
3 more elements
Dependencies are inferred from the claim text.