VOICE ACTIVATION METHOD, APPARATUS, ELECTRONIC DEVICE, AND STORAGE MEDIUM

• US 20190272820A1
• Filed: 05/22/2019
• Published: 09/05/2019
• Est. Priority Date: 02/16/2017
• Status: Active Grant

• Current Assignee: Tencent Technology Company Limited (Tencent Holdings Limited)
• Original Assignee: Tencent Technology Company Limited (Tencent Holdings Limited)
• Inventors: XIANG, Qianbiao, CHEN, Menglin
• Granted Patent: US 11,069,343 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 2360/148 Instrument input by voice
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/10 Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
• CPC Class Codes: G10L 15/02 Feature extraction for speech recognition; Selection of recognition unit
• CPC Class Codes: G10L 15/08 Speech classification or search
• CPC Class Codes: G10L 15/20 Speech recognition techniques specially adapted for robustness in adverse environments, e.g. in noise, of stress induced speech G10L21/02 takes precedence
• CPC Class Codes: G10L 15/22 Procedures used during a speech recognition process, e.g. man-machine dialogue
• CPC Class Codes: G10L 2015/088 Word spotting
• CPC Class Codes: G10L 2015/223 Execution procedure of a spoken command
• CPC Class Codes: G10L 2025/783 based on threshold decision
• CPC Class Codes: G10L 25/51 for comparison or discrimination
• CPC Class Codes: G10L 25/84 for discriminating voice from noise

Abstract

Embodiments of the present disclosure disclose a voice activation method, an apparatus, an electronic device, and a storage medium thereof. The voice activation method includes: capturing a voice signal in a vehicle; calculating an acoustic score of an activation keyword extracted from the voice signal, the acoustic score being used for indicating authenticity of the activation keyword, the authenticity of the activation keyword being a probability that the activation keyword is used for waking up the electronic device to perform a voice activation operation, and a magnitude of the acoustic score being positively correlated to a magnitude of the probability; determining a voice activation threshold according to a noise level in the vehicle, a magnitude of the voice activation threshold being negatively correlated to a magnitude of the noise; and performing the voice activation operation when the acoustic score is greater than the voice activation threshold.

Claims

1. A voice activation method applied to an electronic device in a vehicle, comprising:

capturing a voice signal in a vehicle;

calculating an acoustic score of an activation keyword extracted from the voice signal, the acoustic score being used for indicating authenticity of the activation keyword, the authenticity of the activation keyword being a probability that the activation keyword is used for waking up the electronic device to perform a voice activation operation, and a magnitude of the acoustic score being positively correlated to a magnitude of the probability;

determining a voice activation threshold according to a noise level in the vehicle, a magnitude of the voice activation threshold being negatively correlated to a magnitude of the noise; and

performing the voice activation operation when the acoustic score is greater than the voice activation threshold.

2. The method according to claim 1, wherein before the determining a voice activation threshold according to the noise level in the vehicle, the method further comprises:

determining the noise level in the vehicle according to an average decibel value of the voice signal;

or

capturing a segment of a second voice signal, and determining the noise level in the vehicle according to an average decibel value of the segment of the second voice signal;

or

determining the noise level in the vehicle according to an average decibel value of all captured voice signals.

3. The method according to claim 1, wherein before the determining a voice activation threshold according to the noise level in the vehicle, the method further comprises:

determining the noise level in the vehicle according to a vehicle velocity, the magnitude of the noise level is positively correlated to a velocity of the vehicle.

4. The method according to claim 1, wherein the determining a voice activation threshold according to noise in the vehicle comprises:

obtaining a noise interval and a voice activation threshold interval, each value in the noise interval corresponding to one value in the voice activation threshold interval; and

selecting the voice activation threshold value according to a value of the noise in the noise interval.

5. The method according to claim 2, wherein the determining a voice activation threshold according to noise in the vehicle comprises:

obtaining a noise interval and a voice activation threshold interval, each value in the noise interval corresponding to one value in the voice activation threshold interval; and

selecting the voice activation threshold value according to a value of the noise in the noise interval.

6. The method according to claim 3, wherein the determining a voice activation threshold according to noise in the vehicle comprises:

obtaining a noise interval and a voice activation threshold interval, each value in the noise interval corresponding to one value in the voice activation threshold interval; and

selecting the voice activation threshold value according to a value of the noise in the noise interval.

7. The method according to claim 1, wherein the electronic device in the vehicle is an electronic device mounted in the vehicle or a mobile terminal placed in the vehicle, and the electronic device mounted in the vehicle is a center console, an onboard device, or an intelligent rear view mirror.

8. An electronic device, the electronic device comprising:

one or more processors; and

a memory,

the memory storing one or more programs, the one or more programs being configured to be executed by the one or more processors, and the one or more programs comprising instructions for performing the following operations;

capturing a voice signal in a vehicle;

calculating an acoustic score of an activation keyword extracted from the voice signal, the acoustic score being used for indicating authenticity of the activation keyword, the authenticity of the activation keyword being a probability that the activation keyword is used for waking up the electronic device to perform a voice activation operation, and a magnitude of the acoustic score being positively correlated to a magnitude of the probability;

determining a voice activation threshold according to a noise level in the vehicle, a magnitude of the voice activation threshold being negatively correlated to a magnitude of the noise; and

performing the voice activation operation when the acoustic score is greater than the voice activation threshold.

9. The electronic device according to claim 8, wherein the one or more programs further comprise instructions for performing the following operation:

before the determining a voice activation threshold according to the noise level in the vehicle, determining the noise level in the vehicle according to an average decibel value of the voice signal.

10. The electronic device according to claim 8, wherein the one or more programs further comprise instructions for performing the following operation:

capturing a segment of a second voice signal before obtaining the voice signal, and determining the noise level in the vehicle according to an average decibel value of the segment of the second voice signal;

or

capturing a segment of the second voice signal before obtaining the voice signal, and determining the noise level in the vehicle according to an average decibel value of all captured voice signals.

11. The electronic device according to claim 8, wherein the one or more programs further comprise an instruction used for performing the following operation:

determining the noise in the vehicle according to a vehicle velocity before the determining a voice activation threshold according to noise in the vehicle, wherein the magnitude of the noise is positively correlated to a magnitude of the vehicle velocity.

12. The electronic device according to claim 8, wherein the one or more programs further comprise an instruction used for performing the following operations:

obtaining a noise interval and a voice activation threshold interval, wherein each value in the noise interval corresponds to one value in the voice activation threshold interval; and

selecting the voice activation threshold interval, according to a value of the noise in the noise interval, a value corresponding to the value in the noise interval of the voice activation threshold.

13. The electronic device according to claim 9, wherein the one or more programs further comprise an instruction used for performing the following operations:

obtaining a noise interval and a voice activation threshold interval, wherein each value in the noise interval corresponds to one value of the voice activation threshold interval; and

selecting the voice activation threshold interval, according to a value of the noise in the noise interval, a value corresponding to the value in the noise interval of the voice activation threshold.

14. The electronic device according to claim 10, wherein the one or more programs further comprise an instruction used for performing the following operations:

obtaining a noise interval and a voice activation threshold interval, wherein each value in the noise interval corresponds to one value of the voice activation threshold interval; and

selecting the voice activation threshold interval, according to a value of the noise in the noise interval, a value corresponding to the value in the noise interval of the voice activation threshold.

15. The electronic device according to claim 8, wherein the electronic device in the vehicle is an electronic device mounted in the vehicle or a mobile terminal placed in the vehicle, and the electronic device mounted in the vehicle is a center console, an onboard device, or an intelligent rear view mirror.

16. A non-transitory computer-readable storage medium storing computer program instructions executable by at least one processor to perform:

capturing a voice signal in a vehicle;

calculating an acoustic score of an activation keyword extracted from the voice signal, the acoustic score being used for indicating authenticity of the activation keyword, the authenticity of the activation keyword being a probability that the activation keyword is used for waking up the electronic device to perform a voice activation operation, and a magnitude of the acoustic score being positively correlated to a magnitude of the probability;

determining a voice activation threshold according to a noise level in the vehicle, a magnitude of the voice activation threshold being negatively correlated to a magnitude of the noise; and

performing the voice activation operation when the acoustic score is greater than the voice activation threshold.

17. The storage medium according to claim 16, wherein the computer program instructions further cause the at least one processor to perform:

before the determining a voice activation threshold according to the noise level in the vehicle, determining the noise level in the vehicle according to an average decibel value of the voice signal.

18. The storage medium according to claim 16, wherein the computer program instructions further cause the at least one processor to perform:

capturing a segment of a second voice signal before obtaining the voice signal, and determining the noise level in the vehicle according to an average decibel value of the segment of the second voice signal.

19. The storage medium according to claim 16, wherein the computer program instructions further cause the at least one processor to perform:

capturing a segment of the second voice signal before obtaining the voice signal, and determining the noise level in the vehicle according to an average decibel value of all captured voice signals.

20. The storage medium according to claim 16, wherein the computer program instructions further cause the at least one processor to perform:

determining the noise in the vehicle according to a vehicle velocity before the determining a voice activation threshold according to noise in the vehicle, wherein the magnitude of the noise is positively correlated to a magnitude of the vehicle velocity.