Low power detection of a voice control activation phrase
AssigneeImagination Technologies Limited
InventorBenjamin James KERR
Life of this patent
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Abstract
Methods of low power detection of an activation phrase are described. A microphone system comprises dedicated hardware logic for detecting a pre-defined activation phrase in an audio stream received via a microphone. If the pre-defined activation phrase is detected, the hardware logic sends a trigger signal to activate a module, such as a main speech detection module, which is external to the microphone system and which may be in a low power standby state.
Claims20
A microphone system comprising a microphone and hardware logic configured to compare an audio stream received via the microphone with a pre-defined phrase and in response to detecting the pre-defined phrase in the audio stream, to send a trigger signal to activate a module external to the microphone system.
A method of operating a microphone system comprising:
- detecting an audio stream from a microphone in the microphone system;
- comparing the detected audio stream with a pre-defined phrase stored in dedicated hardware in the microphone system,;
- and
- in response to detecting the pre-defined phrase in the detected audio stream, sending a trigger signal to activate a module external to the microphone system.
Dependencies are inferred from the claim text.