SPEECH RECOGNITION SYSTEM

• US 20170243580A1
• Filed: 09/30/2014
• Published: 08/24/2017
• Est. Priority Date: 09/30/2014
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: FURUMOTO, Yuki, OSAWA, Masanobu, TAKEI, Takumi, BABA, Naoya
• Granted Patent: US 10,475,448 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 2360/55 Remote control arrangements
• CPC Class Codes: B60K 2370/152 Displays
• CPC Class Codes: B60K 2370/55 Remote controls
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/22 Display screens
• CPC Class Codes: B60K 35/80 Arrangements for controlling instruments
• CPC Class Codes: B60R 16/0373 Voice control in general G10L
• CPC Class Codes: G01C 21/26 specially adapted for navigation in a road network
• CPC Class Codes: G01C 21/3608 using speech input, e.g. using speech recognition
• CPC Class Codes: G10L 15/1815 Semantic context, e.g. disambiguation of the recognition hypotheses based on word meaning
• CPC Class Codes: G10L 15/22 Procedures used during a speech recognition process, e.g. man-machine dialogue
• CPC Class Codes: G10L 15/28 Constructional details of speech recognition systems
• CPC Class Codes: G10L 2015/223 Execution procedure of a spoken command
• CPC Class Codes: G10L 2015/227 of the speaker; Human-factor methodology
• CPC Class Codes: G10L 21/0316 by changing the amplitude
• CPC Class Codes: G10L 25/51 for comparison or discrimination

Abstract

A speech recognition system, which continuously recognizes speech uttered by at least one user and controls a navigation system on the basis of a recognition result, includes: a speech-operation-intention determination unit for determining—whether or not the user has made a recognized speech with the intention of operating the navigation system through speech; and a control mode altering unit for changing, when the speech-operation-intention determination unit determines that the user has no operation intention, the control mode of the navigation system in such a manner that the user is less aware of or pays less attention to the control mode than the case in which the speech-operation-intention determination unit determines that the user has an intention of operating the navigation system.

Claims

1-6. -6. (canceled)

7. A speech recognition system that continuously recognizes speech uttered by at least one user, and controls a device to be controlled on a basis of a recognition result, the speech recognition system comprising:

a speech-operation-intention determinator to determine whether or not the user has an intention of operating the device to be controlled through the recognized speech; and

a control mode alterer to control the device to be controlled to continuously respond, and change, when the speech-operation-intention determinator determines that the user has no intention of operating the device to be controlled, a control mode of the device to be controlled to cause the device to operate in such a manner that the user is less aware of or pays less attention to the control mode of the device to be controlled than a case in which the speech-operation-intention determinator determines that the user has the intention of operating the device to be controlled.

8. The speech recognition system according to claim 7, wherein

the speech-operation-intention determinator determines a reliability indicating a degree of the operation intention when the speech-operation-intention determinator determines that the user has the operation intention;

and

the control mode alterer changes, when the reliability determined by the speech-operation-intention determinator is low, the control mode of the device to be controlled in such a manner that the user is less aware of or pays less attention to the device to be controlled than a case in which the reliability is high.

9. The speech recognition system according to claim 7, wherein

the control mode alterer obtains a determination result that indicates whether or not recognition of the speech by the user is unsuccessful,

the control mode alterer controls the device to be controlled, when the speech uttered by the user is failed to be recognized, to inform the user of a failure in recognizing the speech;

and

the control mode alterer changes, when the speech-operation-intention determinator determines that the user has no intention of operating the device to be controlled, a mode of notification in such a manner that the user is less aware of or pays less attention to the mode of notification than the case in which the speech-operation-intention determinator determines that the user has the intention of operating the device to be controlled.

10. The speech recognition system according to claim 9, wherein

the control mode alterer controls the device to be controlled, when the speech uttered by the user is failed to be recognized, to notify the user of a failure in recognizing the speech, or changes, when the reliability of the operation intention of the speech is low, a mode of notification in such a manner that the user is less aware of or pays less attention to the mode of notification than a case in which the reliability is high.

11. The speech recognition system according to claim 9, wherein

the control mode alterer controls the device to be controlled, when the speech uttered by the user is failed to be recognized, to notify the user of a failure in recognizing the speech by sound, or turns down, when the reliability of the operation intention of the speech is low, the volume of the sound than the case in which the reliability is high.

12. The speech recognition system according to claim 7, wherein the speech-operation-intention determinator determines that the user has no intention of operating the device to be controlled when speeches arrive from a plurality of directions.

13. The speech recognition system according to claim 7, wherein the control mode alterer turns down the volume of speech output of the device to be controlled, or reduces an amount of information of speech output content or display content of the device to be controlled, or a process volume to be processed by the device to be controlled.

14. The speech recognition system according to claim 9, wherein the control mode alterer turns down the volume of speech output of the device to be controlled, or reduces an amount of information of speech output content or display content of the device to be controlled, or a process volume to be processed by the device to be controlled.