Controller for voice-controlled device and associated method
A controller for a voice-controlled device is provided. The controller includes a setting module and a recognition module. The setting module generates a threshold according to an environmental parameter. The recognition module compares a confident score of speech recognition with the threshold to accordingly execute voice control.
1. A controller for a voice-controlled device, comprising:
an environment detector, configured to detect an environment to obtain an environmental parameter associated with a volume value;
a setting module, configured to set a threshold according to the environmental parameter, wherein the setting module sets the threshold to a higher threshold when the volume value is higher and sets the threshold to a lower threshold when the volume value is lower; and
a recognition module, configured to receive a speech, to perform speech recognition on the speech to generate a confidence score of speech recognition, and to compare the confidence score of speech recognition with the threshold to generate a control signal.
2. The controller according to claim 1 , wherein the environmental parameter is a volume value.
3. The controller according to claim 1 , further comprising an environment detector configured to detect the environment to obtain the environmental parameter.
4. The controller according to claim 3 , wherein the environment detector is configured to detect a volume of the environment.
5. The controller according to claim 1 , wherein the controller comprises a storage unit, the storage unit is configured to store a look-up table (LUT), and the setting module looks up the LUT according to the environmental parameter to generate the threshold.
6. The controller according to claim 1 , wherein the environmental parameter is a volume value of a speaker of the voice-controlled device which is controlled by a user.
7. A method for a voice-controlled device, comprising:
detecting, with an environment detector, an environment to obtain an environmental parameter associated with a volume value;
setting, with a setting module, a threshold according the environmental parameter, wherein the threshold is set to a higher threshold when the volume value is higher and the threshold is set to a lower threshold when the volume value is lower;
receiving a speech, and performing speech recognition on the speech to generate a confidence score of speech recognition; and
comparing the confidence score of speech recognition with the threshold to generate a control signal.
8. The method according to claim 7 , wherein the environmental parameter is a volume value of a speaker of the voice-controlled device which is controlled by a user.
9. The method according to claim 7 , wherein the environmental parameter is a volume value.
10. The method according to claim 7 , wherein the environmental parameter is obtained by detecting a volume of the environment.
11. The method according to claim 7 , wherein the step of generating the threshold according to the environmental parameter comprises:
looking up an LUT according to the environmental parameter to generate the threshold.