US 2018/0324518 A1 · AUTOMATIC SPEECH RECOGNITION TRIGGERING SYSTEM

Abstract

An automatic speech recognition (ASR) triggering system, and a method of providing an ASR trigger signal, is described. The ASR triggering system can include a microphone to generate an acoustic signal representing an acoustic vibration and an accelerometer worn in an ear canal of a user to generate a non-acoustic signal representing a bone conduction vibration. A processor of the ASR triggering system can receive an acoustic trigger signal based on the acoustic signal and a non-acoustic trigger signal based on the non-acoustic signal, and combine the trigger signals to gate an ASR trigger signal. For example, the ASR trigger signal may be provided to an ASR server only when the trigger signals are simultaneously asserted. Other embodiments are also described and claimed.

Claims19

Dependent claims

An automatic speech recognition (ASR) triggering system, comprising:

a microphone to generate an acoustic signal representing an acoustic vibration;
an accelerometer to generate a non-acoustic signal representing a bone conduction vibration;
an acoustic detector to receive the acoustic signal and to generate an acoustic trigger signal in response to the acoustic signal matching an energy signature of a key-phrase;
a voice activity detector (VAD) to receive the non-acoustic signal and to generate a VAD signal based on the non-acoustic signal;
a pattern detector to receive the VAD signal and to generate a non-acoustic trigger signal in response to the VAD signal matching a predetermined sequence of energy intervals of the key phrase;
and
a processor to receive the acoustic trigger signal and the non-acoustic trigger signal, and generate an ASR trigger signal based on a combination of the acoustic trigger signal and the non-acoustic trigger signal when the acoustic trigger signal and the non-acoustic trigger signal are asserted.

4 more elements

Dependencies are inferred from the claim text.

Automatic speech recognition triggering system

Life of this patent

Automatic speech recognition triggering system

Life of this patent

Abstract

Claims19