Speech recognition wake-up of a handheld portable electronic device
First Claim
1. A handheld portable electronic device comprising:
- a plurality of microphones to pick up speech of a user, including a first microphone differently positioned than a second microphone;
a first processor communicatively coupled with the plurality of microphones and having a power-saving state and a non-power-saving state; and
a second processor communicatively coupled with the first processor and the plurality of microphones, the second processor configured to;
receive a plurality of audio signals from the plurality of microphones;
process each of the audio signals to recognize a command in any one of the audio signals;
identify a preferred microphone being preferable for speech pick up, based on results of the process of recognizing the command;
and signal the first processor to transition from the power-saving state to the non-power-saving state in response to recognizing the command in one or more of the audio signals, wherein, during the non-power-saving state, the first processor performs speech recognition on an audio signal from the identified preferred microphone.
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Abstract
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.
13 Citations
18 Claims
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1. A handheld portable electronic device comprising:
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a plurality of microphones to pick up speech of a user, including a first microphone differently positioned than a second microphone; a first processor communicatively coupled with the plurality of microphones and having a power-saving state and a non-power-saving state; and a second processor communicatively coupled with the first processor and the plurality of microphones, the second processor configured to; receive a plurality of audio signals from the plurality of microphones; process each of the audio signals to recognize a command in any one of the audio signals; identify a preferred microphone being preferable for speech pick up, based on results of the process of recognizing the command; and signal the first processor to transition from the power-saving state to the non-power-saving state in response to recognizing the command in one or more of the audio signals, wherein, during the non-power-saving state, the first processor performs speech recognition on an audio signal from the identified preferred microphone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method in a handheld portable device, compromising:
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a plurality of microphones to pick up speech of a user, including a first microphone differently positioned than a second microphone; a first processor communicatively coupled with the plurality of microphones and having a first power state and a second power state, the first power state being a power-saving state; and a second processor communicatively coupled with the first processor and the plurality of microphones, the second processor configured to; receive a plurality of audio signals from the plurality of microphones; process each of the audio signals to recognize a command in any one of the audio signals; identify a preferred microphone being preferable for speech pick up, based on results of the process of recognizing the command; and signal the first processor to transition from the first power state to the second power state in response to recognizing the command in one or more of the audio signals, wherein, during a non-power-saving state, the first processor performs speech recognition on an audio signal from the identified preferred microphone. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification