Word-spotting apparatus, word-spotting method, and word-spotting program
AssigneePioneer Corporation
InventorHajime Kobayashi
Life of this patent
Estimating the term…
Abstract
The word-spotting apparatus is provided with: a feature parameter generator which extracts a speech segment from an input utterance, divides it into frames, and generates feature parameters of the utterance; an acoustic model storage which stores feature parameters of speech at a subword level; keyword model generator which generates a keyword model using pronunciation data of a keyword outputted from a keyword storage and feature parameters outputted from the acoustic model storage; a keyword likelihood calculator which calculates keyword similarity between the feature parameters of the utterance and feature parameters of the keyword model; and the Viterbi processor which calculates cumulative similarity of the keyword model.
Claims42
A word-spotting apparatus, comprising:
- a feature parameter generating device which extracts a speech segment from an input utterance, divides it into frames, and generates feature parameters of the utterance;
- an acoustic model database which stores feature parameters of speech at a subword level;
- keyword model generating device which generates a keyword model using pronunciation data of a keyword outputted from a keyword database and feature parameters outputted from the acoustic model database;
- a keyword similarity calculation device which calculates keyword similarity between the feature parameters of the utterance and feature parameters of the keyword model;
- and
- a cumulative keyword similarity calculation device which calculates cumulative similarity of the keyword model.
A word-spotting method, comprising:
- a feature parameter generating process for extracting a speech segment from an input utterance, dividing it into frames, and generating feature parameters of the utterance;
- a keyword model generating process for generating a keyword model using pronunciation data of a keyword outputted from a keyword database and feature parameters outputted from an acoustic model database which stores feature parameters of speech at a subword level;
- a keyword similarity calculation process for calculating keyword similarity between the feature parameters of the utterance and feature parameters of the keyword model;
- and
- a cumulative keyword similarity calculation process for calculating cumulative similarity of the keyword model.
A word-spotting program running on a computer included in word-spotting apparatus, wherein the word-spotting program makes the computer function as:
- a feature parameter generating device which extracts a speech segment from an input utterance, divides it into frames, and generates feature parameters of the utterance;
- an acoustic model database which stores feature parameters of speech at a subword level;
- a keyword model generating device which generates a keyword model using pronunciation data of a keyword outputted from a keyword database and feature parameters outputted from the acoustic model database;
- a keyword similarity calculation device which calculates keyword similarity between the feature parameters of the utterance and feature parameters of the keyword model;
- and
- a cumulative keyword similarity calculation device which calculates cumulative similarity of the keyword model.
Dependencies are inferred from the claim text.