Method and device for acute sound detection and reproduction
An electronic device or method for adjusting a gain on a voice operated control system can include one or more processors and a memory having computer instructions. The instructions, when executed by the one or more processors causes the one or more processors to perform the operations of receiving a first microphone signal, receiving a second microphone signal, updating a slow time weighted ratio of the filtered first and second signals, and updating a fast time weighted ratio of the filtered first and second signals. The one or more processors can further perform the operations of calculating an absolute difference between the fast time weighted ratio and the slow time weighted ratio, comparing the absolute difference with a threshold, and increasing the gain when the absolute difference is greater than the threshold. Other embodiments are disclosed.
1. A method of adjusting a gain on a voice operated control system, comprising:
determining a first slow time weighted ratio of a filtered first microphone signal and a filtered second microphone signal;
determining a first fast time weighted ratio of the filtered first microphone signal and the filtered second microphone signal;
determining a second slow time weighted ratio of the filtered first microphone signal and a filtered third microphone signal;
determining a second fast time weighted ratio of the filtered first microphone signal and the filtered third microphone signal;
comparing, with a first threshold, a first absolute difference between the first fast time weighted ratio and the first slow time weighted ratio;
comparing, with a second threshold, a second absolute difference between the second fast time weighted ratio and the second slow time weighted ratio; and
adjusting the gain on the voice operated control system when the first absolute difference is greater than the first threshold or the second absolute difference is greater than the second threshold, wherein a voice activity status is utilized to control the gain on the voice operated control system and to adjust a level of a signal directed to a voice receiving system in communication with the voice operated control system.
2. The method of claim 1 , further comprising receiving a first microphone signal, a second microphone signal, and a third microphone signal.
3. The method of claim 2 , further comprising filtering the first microphone signal to generate the filtered first microphone signal, filtering the second microphone signal to generate the filtered second microphone signal, and filtering the third microphone signal to generate the filtered third microphone signal.
4. The method of claim 1 , further comprising determining the voice activity status based on the comparing of the first absolute difference or the second absolute difference.
5. The method of claim 1 , further comprising updating the first fast time weighted ratio, the first slow time weighted ratio, the second fast time weighted ratio, the second slow time weighted ratio, or a combination thereof.
6. The method of claim 1 , further comprising increasing the gain on the voice operated control system by adjusting a gain from a first microphone, adjusting a gain from a second microphone, adjusting a gain from a third microphone, or a combination thereof.
7. The method of claim 1 , further comprising determining the voice activity status using singular value decomposition, a neural net system, a bounded probability value or a combination thereof.
8. The method of claim 1 , further comprising generating the filtered first microphone signal, the filtered second microphone signal and the filtered third microphone signal by band pass filtering first, second, and third microphone signals respectively.
9. The method of claim 1 , further comprising determining a power estimate of the filtered first microphone signal, the filtered second microphone signal, the filtered third microphone signal, or a combination thereof.
10. The method of claim 1 , further comprising setting the gain of the voice operated control system to zero when no voice activity is detected.
11. The method of claim 1 , further comprising adjusting a data rate in the voice receiving system.
12. A device for adjusting a gain on a voice operated control system, comprising:
a processor; and
a memory having computer instructions, wherein the instructions, when executed by the processor, cause the processor to perform operations comprising:
calculating a first slow time weighted ratio of a filtered first microphone signal and a filtered second microphone signal;
calculating a first fast time weighted ratio of the filtered first microphone signal and the filtered second microphone signal;
comparing, with a first threshold, a first absolute difference between the first fast time weighted ratio and the first slow time weighted ratio;
calculating a second slow time weighted ratio of the filtered first microphone signal and a filtered third microphone signal;
calculating a second fast time weighted ratio of the filtered first microphone signal and the filtered third microphone signal;
comparing, with a second threshold, a second absolute difference between the second fast time weighted ratio and the second slow time weighted ratio; and
adjusting the gain on the voice operated control system when the first absolute difference is greater than the first threshold or the second absolute difference is greater than the second threshold, wherein a voice activity status is utilized to control the gain on the voice operated control system and to adjust a level of a signal directed to a voice receiving system in communication with the voice operated control system.
13. The device of claim 12 , wherein the operations further comprise adjusting a power of the voice receiving system by utilizing the voice activity status.
14. The device of claim 12 , wherein the operations further comprise determining the voice activity status by utilizing three microphones of the device.
15. The device of claim 12 , wherein the operation further comprise reducing a data rate of the voice receiving system.
16. The device of claim 12 , wherein the operations further comprise determining a power estimate of the filtered first microphone signal, the filtered second microphone signal, the filtered third microphone signal or a combination thereof.
17. The device of claim 12 , wherein the operations further comprise calculating the first fast time weighted ratio based on a first fast time weighted average of the filtered first microphone signal that is calculated based on a first fast time weighting coefficient that is greater than a first slow time weighting coefficient utilized in a first slow time weighted average of the filtered first microphone signal utilized in calculating the first slow time weighted ratio.
18. The device of claim 12 , wherein the operations further comprise calculating the first absolute difference between the first fast time weighted ratio and the first slow time weighted ratio.
19. The device of claim 12 , wherein the operations further comprise setting the gain of the voice operated control system to zero when no voice activity is detected.
20. A method of adjusting a gain on a voice operated control system, comprising:
determining a slow time weighted ratio of a filtered first microphone signal and at least one of a filtered second microphone signal and a filtered third microphone signal;
determining a fast time weighted ratio of the filtered first microphone signal and at least one of the filtered second microphone signal and the filtered third microphone signal;
calculating an absolute difference between the fast time weighted ratio and the slow time weighted ratio; and
adjusting a gain on the voice operated control system when the absolute difference is greater than a threshold, wherein a voice activity status is utilized to control the gain on the voice operated control system and to adjust a level of a signal directed to a voice receiving system in communication with the voice operated control system.