US 9,431,007 B2 · Voice search device, voice search method, and non-transitory recording medium

Abstract

In a voice search device, a processor acquires a search word, converts the search word into a phoneme sequence, acquires, for each frame, an output probability of a feature quantity of a target voice signal being output from each phoneme included in the phoneme sequence, and executes relative calculation of the output probability acquired from each phoneme, based on an output probability acquired from another phoneme included in the phoneme sequence. In addition, the processor successively designates likelihood acquisition zones, acquires a likelihood indicating how likely a designated likelihood acquisition zone is a zone in which voice corresponding to the search word is spoken, and identifies from the target voice signal an estimated zone for which the voice corresponding to the search word is estimated to be spoken, based on the acquired likelihood.

Claims21

Dependent claims

A voice search device comprising:

a processor;
and
a memory storing instructions that, when executed by the processor, control the processor to:
convert a search word into a phoneme sequence;
acquire, for each of frames in a target voice signal, a plurality of relative values between (i) a base phoneme selected for the frame from among a plurality of base phonemes each of which is selected for a respective different one of the frames in the target voice signal, and (ii) phonemes included in the phoneme sequence, wherein each of the frames has a time length;
designate a plurality of zones in the target voice signal, each of the zones having a time length;
acquire, using the plurality of relative values, a plurality of likelihoods each indicating how likely a respective zone from among the plurality of zones is a zone in which voice corresponding to the search word is spoken;
and
specify a zone corresponding to the search word from among the plurality of zones, based on the plurality of likelihoods.

6 more elements

A voice search method comprising:

converting a search word into a phoneme sequence;
acquiring, for each of frames in a target voice signal, a plurality of relative values between (i) a base phoneme selected for the frame from among a plurality of base phonemes each of which is selected for a respective different one of the frames in the target voice signal, and (ii) phonemes included in the phoneme sequence, wherein each of the frames has a time length;
designating a plurality of zones in the target voice signal, each of the zones having a time length;
acquiring, using the plurality of relative values, a plurality of likelihoods each indicating how likely a respective zone from among the plurality of zones is a zone in which voice corresponding to the search word is spoken;
and
specifying a zone corresponding to the search word from among the plurality of zones, based on the plurality of likelihoods.

3 more elements

A non-transitory recording medium having a program recorded thereon that is executable to control a computer to:

convert a search word into a phoneme sequence;
acquire, for each of frames in a target voice signal, a plurality of relative values between (i) a base phoneme selected for the frame from among a plurality of base phonemes each of which is selected for a respective different one of the frames in the target voice signal, and (ii) phonemes included in the phoneme sequence, wherein each of the frames has a time length;
designate a plurality of zones in the target voice signal, each of the zones having a time length;
acquire, using the plurality of relative values, a plurality of likelihoods each indicating how likely a respective zone from among the plurality of zones is a zone in which voice corresponding to the search word is spoken;
and
specify a zone corresponding to the search word from among the plurality of zones, based on the plurality of likelihoods.

3 more elements

Dependencies are inferred from the claim text.

Voice search device, voice search method, and non-transitory recording medium

Life of this patent

Voice search device, voice search method, and non-transitory recording medium

Life of this patent

Abstract

Claims21