VIBRATION SENSOR AND ACOUSTIC VOICE ACTIVITY DETECTION SYSTEMS (VADS) FOR USE WITH ELECTRONIC SYSTEMS

摘要

A voice activity detector (VAD) combines the use of an acoustic VAD and a vibration sensor VAD as appropriate to the conditions a host device is operated. The VAD includes a first detector receiving a first signal and a second detector receiving a second signal. The VAD includes a first VAD component coupled to the first and second detectors. The first VAD component determines that the first signal corresponds to voiced speech when energy resulting from at least one operation on the first signal exceeds a first threshold. The VAD includes a second VAD component coupled to the second detector. The second VAD component determines that the second signal corresponds to voiced speech when a ratio of a second parameter corresponding to the second signal and a first parameter corresponding to the first signal exceeds a second threshold.

主权项

1. A method comprising:
receiving a first signal at a first detector and a second signal at a second detector, wherein the first signal is different from die second signal; determining the first signal corresponds to voiced speech when energy resulting from at least one operation on the first signal exceeds a first threshold; determining a state of contact of the first detector with skin of a user; determining the second signal corresponds to voiced speech when a ratio of a second parameter corresponding to the second signal and a first parameter corresponding to the first signal exceeds a second threshold; and one of generating a voice activity detection (VAD) signal to indicate a presence of voiced speech when the first signal corresponds to voiced speech and the state of contact is a first state, and generating the VAD signal when either of the first signal and die second signal correspond to voiced speech and the state of contact is a second state.