SPEECH RECOGNITION WAKE-UP OF A HANDHELD PORTABLE ELECTRONIC DEVICE

摘要

A system and method for parallel speech recognition processing of multiple audio signals produced by multiple microphones in a handheld portable electronic device. In one embodiment, a primary processor transitions to a power-saving mode while an auxiliary processor remains active. The auxiliary processor then monitors the speech of a user of the device to detect a wake-up command by speech recognition processing the audio signals in parallel. When the auxiliary processor detects the command it then signals the primary processor to transition to active mode. The auxiliary processor may also identify to the primary processor which microphone resulted in the command being recognized with the highest confidence. Other embodiments are also described.

主权项

1. A handheld portable electronic device comprising:
a plurality of microphones to pickup speech of a user, including a first microphone differently positioned than a second microphone; a long phrase recognition processor communicatively coupled with the plurality of microphones and having an activated state and a deactivated state; and a short phrase recognition processor having a plurality of speech recognition, SR, engines to remain activated while the long phrase recognition processor is in the deactivated state, the plurality of SR engines to receive a plurality of audio signals, respectively, from the plurality of microphones, respectively, so that the audio signals are processed in parallel by the SR engines, respectively, to recognize a command in any one of the respective audio signals, the short phrase processor to signal the long phrase processor to transition from the deactivated state to the activated state in response to any one of the SR engines recognizing the command in its respective audio signal.