Voice detection
A method for voice detection, the method may include (a) generating an in-ear signal that represents a signal sensed by an in-ear microphone and fed to a feedback active noise cancellation (ANC) circuit; (b) generating at least one additional signal, based on at least one out of a playback signal and a pickup signal sensed by a voice pickup microphone; and (c) generating a voice indicator based on the in-ear signal and the at least one additional signal.
1. A method for voice detection, the method comprises:
generating an in-ear signal that represents a signal sensed by an in-ear microphone and fed to a feedback active noise cancellation (ANC) circuit;
generating at least one additional signal, based on at least one out of a playback signal and a pickup signal sensed by a voice pickup microphone; and
generating a voice indicator based on the in-ear signal and the at least one additional signal;
wherein at least one step out of the generating of the in-ear signal and the generating of the voice pickup signal comprises rate reduction for reducing a rate of signal outputted from an analog to digital converter.
2. The method according to claim 1 wherein the at least one additional signal is based on the playback signal and on the pickup signal.
3. The method according to claim 2 comprising subtracting, from the in-ear signal, a sum of the playback signal and the pickup signal to provide the voice indicator.
4. The method according to claim 1 wherein the at least one additional signal, is based on the playback signal and not on the pickup signal.
5. The method according to claim 1 wherein the generating of the voice indicator is followed by validating the voice indicator by a voice activity detection unit.
6. The method according to claim 5 comprising initiating a speech recognition process following a successful validation of the voice indicator.
7. The method according to claim 5 comprising generating an alert following a successful validation of the voice indicator.
8. A method for voice detection, the method comprises:
generating an in-ear signal that represents a signal sensed by an in-ear microphone and fed to a feedback active noise cancellation (ANC) circuit;
generating at least one additional signal, based on at least one out of a playback signal and a pickup signal sensed by a voice pickup microphone;
generating a voice indicator based on the in-ear signal and the at least one additional signal;
generating an ambient noise cancellation signal based on signals sensed by a far field microphone,
adding, by a first adder, the playback signal and the pickup signal to provide a sum of the playback signal and the pickup signal;
adding, by a second adder, the ambient noise cancellation signal to the sum of the playback signal and the pickup signal to provide an intermediate signal;
feeding the intermediate signal to the feedback ANC unit; and
wherein the generating of the voice indicator comprises subtracting, from the in-ear signal, the sum of the playback signal and the pickup signal to provide the voice indicator.
9. The method according to claim 8 wherein at least one step out of the generating of the in-ear signal and the generating of the voice pickup signal comprises rate reduction for reducing a rate of signals outputted from of an analog to digital converter.
10. The method according to claim 1 wherein the generating of the in-ear signal comprises:
receiving an analog in-ear signal from the ANC circuit; and
analog to digital converting the analog in-ear signal by provide a digital in-ear signal.
11. A non-transitory computer readable medium that stores instructions for:
generating an in-ear signal that represents a signal sensed by an in-ear microphone and fed to a feedback active noise cancellation (ANC) circuit;
generating at least one additional signal, based on at least one out of a playback signal and a pickup signal sensed by a voice pickup microphone; and
generating a voice indicator based on the in-ear signal and the at least one additional signal; wherein at least one step out of the generating of the in-ear signal and the generating of the voice pickup signal comprises rate reduction for reducing a rate of signals outputted from of an analog to digital converter.
12. The non-transitory computer readable medium according to claim 11 wherein the at least one additional signal, is based on the playback signal and on the pickup signal.
13. The non-transitory computer readable medium according to claim 12 that stores instructions for subtracting, from the in-ear signal, a sum of the playback signal and the pickup signal to provide the voice indicator.
14. The non-transitory computer readable medium according to claim 11 wherein the at least one additional signal, is based on the playback signal and not on the pickup signal.
15. The non-transitory computer readable medium according to claim 11 wherein the generating of the voice indicator is followed by validating the voice indicator by a voice activity detection unit.
16. The non-transitory computer readable medium according to claim 15 that stores instructions for initiating a speech recognition process following a successful validation of the voice indicator.
17. The non-transitory computer readable medium according to claim 15 that stores instructions for generating an alert following a successful validation of the voice indicator.
18. A non-transitory computer readable medium that stores instructions for:
generating an in-ear signal that represents a signal sensed by an in-ear microphone and fed to a feedback active noise cancellation (ANC) circuit;
generating at least one additional signal, based on at least one out of a playback signal and a pickup signal sensed by a voice pickup microphone; and
generating a voice indicator based on the in-ear signal and the at least one additional signal;
generating an ambient noise cancellation signal based on signals sensed by a far field microphone,
adding, by a first adder, the playback signal and the pickup signal to provide a sum of the playback signal and the pickup signal;
adding, by a second adder, the ambient noise cancellation signal to the sum of the playback signal and the pickup signal to provide an intermediate signal;
feeding the intermediate signal to the ANC unit; and
wherein the generating of the voice indicator comprises subtracting, from the in-ear signal, the sum of the playback signal and the pickup signal to provide the voice indicator.
19. The non-transitory computer readable medium according to claim 18 wherein at least one step out of the generating of the in-ear signal and the generating of the voice pickup signal comprises rate reduction for reducing a rate of signals outputted from of an analog to digital converter.
20. The non-transitory computer readable medium according to claim 11 wherein the generating of the in-ear signal comprises:
receiving an analog in-ear signal from the feedback ANC circuit; and
analog to digital converting the analog in-ear signal to provide a digital in-ear signal.
21. A device for voice detection, the device comprises:
an in-ear microphone;
a feedback active noise cancellation (ANC) circuit;
a voice pickup microphone;
a processing unit that is configured to generate an in-ear signal that represents a signal sensed by the in-ear microphone and fed to the feedback ANC circuit; wherein the processing unit comprises an analog to digital converter that is followed by a rate reduction unit configured to reduce a rate of signals outputted from of an analog to digital converter;
at least one other processing unit that is configured to:
generate at least one additional signal, based on at least one out of a playback signal and a pickup signal sensed by the voice pickup microphone; and
generate a voice indicator based on the in-ear signal and the at least one additional signal.
22. The method according to claim 1 wherein the generating of the voice pickup signal comprises rate reduction for reducing a rate of signals outputted from of an analog to digital converter.