Speech recognition method and speech recognition apparatus

1. A speech recognition method in a system that controls one or more devices by using speech recognition, comprising:

obtaining speech information representing speech spoken by a user;

recognizing the speech information, obtained in the obtaining, as character information; and

determining, based on the character information recognized in the recognizing, whether the speech is spoken to the one or more devices;

generating, in a case where it is determined that the speech is spoken to the one or more devices based on the recognized character information, an operation instruction for the one or more devices; and

not generating, in a case where it is determined that the speech is not spoken to the one or more devices based on the recognized character information, the operation instruction for the one or more devices,

wherein at least one of the obtaining, the recognizing, the determining, and the generating is performed by circuitry, and

wherein the determining whether the speech is spoken to the one or more devices includes

analyzing a sentence pattern of the character information,

determining whether the sentence pattern is interrogative,

determining whether the sentence pattern is imperative,

determining whether the sentence pattern is declarative,

determining whether the sentence pattern is exclamatory,

determining, in a case where the sentence pattern is interrogative, that the speech is spoken to the one or more devices,

determining, in a case where the sentence pattern is imperative, that the speech is spoken to the one or more devices,

determining, in a case where the sentence pattern is declarative, that the speech is not spoken to the one or more devices, and

determining, in a case where the sentence pattern is exclamatory, that the speech is not spoken to the one or more devices.

2. The speech recognition method according to claim 1 , further comprising:

measuring, as a silent time, a time since obtaining of the speech information is completed; and

judging, in a case where the speech information is obtained, whether the measured silent time is greater than or equal to a certain time,

wherein the determining determines, in a case where it is determined that the measured silent time is greater than or equal to the certain time, the speech is spoken to the one or more devices.

3. The speech recognition method according to claim 1 , further comprising:

storing in advance a certain keyword regarding an operation of the one or more devices,

wherein the determining determines whether the keyword, which is stored in advance, is included in the character information, and, in a case where the keyword is included in the character information, determines that the speech is spoken to the one or more devices.

4. The speech recognition method according to claim 1 , further comprising:

storing in advance a personal name,

wherein the determining determines whether the personal name, which is stored in advance, is included in the character information, and, in a case where the personal name is included in the character information, determines that the speech is not spoken to the one or more devices.

5. The speech recognition method according to claim 1 , further comprising:

detecting a person in a space where the one or more devices are located,

wherein the determining determines that the speech is not spoken to the one or more devices in response to detection of a plurality of people in the detecting, and determines that the speech is spoken to the one or more devices in response to detection of one person in the detecting.

6. The speech recognition method according to claim 1 ,

wherein the determining determines whether a conjugated form of a declinable word or phrase included in the character information is imperative, and, in a case where the conjugated form is imperative, determines that the speech is spoken to the one or more devices.

7. The speech recognition method according to claim 1 , further comprising:

adding weight values given in accordance with certain determination results for the character information,

wherein the determining determines whether a sum of the weight values added in the adding is greater than or equal to a certain value, and, in a case where the sum of the weight values is greater than or equal to the certain value, determines that the speech is spoken to the one or more devices.

8. The speech recognition method according to claim 7 ,

wherein the adding adds a weight value given in accordance with whether a sentence pattern of the character information is interrogative or imperative, a weight value given in accordance with whether a silent time from when obtaining of the speech information is completed to when obtaining of next speech information is started is greater than or equal to a certain time, a weight value given in accordance with whether a pre-stored certain keyword regarding an operation of the one or more devices is included in the character information, a weight value given in accordance with whether a pre-stored personal name is included in the character information, a weight value given in accordance with whether a plurality of people is detected in a space where the one or more devices are located, and a weight value given in accordance with whether a conjugated form of a declinable word or phrase included in the character information is imperative.

9. The speech recognition method according to claim 1 ,

wherein the one or more devices include a mobile terminal,

wherein the operation instruction includes an operation instruction to obtain a weather forecast for a day specified by the user and output the obtained weather forecast, and

wherein the generating outputs the generated operation instruction to the mobile terminal.

10. The speech recognition method according to claim 1 ,

wherein the one or more devices include a lighting device,

wherein the operation instruction includes an operation instruction to turn on the lighting device and an operation instruction to turn off the lighting device, and

wherein the generating outputs the generated operation instruction to the lighting device.

11. The speech recognition method according to claim 1 ,

wherein the one or more devices include a faucet device that automatically turns on water from an outlet,

wherein the operation instruction includes an operation instruction to turn on water from the faucet device, and an operation instruction to turn off water coming from the faucet device, and

wherein the generating outputs the generated operation instruction to the faucet device.

12. The speech recognition apparatus according to claim 1 ,

wherein the one or more devices include a television,

wherein the operation instruction includes an operation instruction to change a channel of the television, and

wherein the generating outputs the generated operation instruction to the television.

13. A speech recognition apparatus that controls one or more devices by using speech recognition, comprising:

one or more memories; and

circuitry that performs operations, including

obtaining speech information representing speech spoken by a user;

recognizing the speech information, obtained in the obtaining, as character information;

determining, based on the character information recognized in the recognizing, whether the speech is spoken to the one or more devices;

generating, in a case where it is determined that the speech is spoken to the one or more devices based on the recognized character information, an operation instruction for the one or more devices; and

not generating, in a case where it is determined that the speech is not spoken to the one or more devices based on the recognized character information, the operation instruction for the one or more devices, and

wherein the determining whether the speech is spoken to the one or more devices includes

analyzing a sentence pattern of the character information,

determining whether the sentence pattern is interrogative,

determining whether the sentence pattern is imperative,

determining whether the sentence pattern is declarative,

determining whether the sentence pattern is exclamatory,

determining, in a case where the sentence pattern is interrogative, that the speech is spoken to the one or more devices,

determining, in a case where the sentence pattern is imperative, that the speech is spoken to the one or more devices,

determining, in a case where the sentence pattern is declarative, that the speech is not spoken to the one or more devices, and

determining, in a case where the sentence pattern is exclamatory, that the speech is not spoken to the one or more devices.