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Always-on audio control for mobile device

  • US 10,276,165 B2
  • Filed: 08/13/2018
  • Issued: 04/30/2019
  • Est. Priority Date: 11/12/2013
  • Status: Active Grant
First Claim
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1. An integrated circuit comprising:

  • one or more processors;

    at least one memory controller; and

    a first circuit coupled to the one or more processors and to the memory controller, wherein;

    the first circuit is configured to remain powered up during times that the one or more processors and the memory controller are powered down;

    the first circuit is configured to receive audio samples captured by one or more audio input devices and to detect a predetermined pattern in the audio samples during a time that the one or more processors and the memory controller are powered down;

    the first circuit is configured to cause the memory controller and the one or more processors to power up responsive to detecting the predetermined pattern;

    the first circuit is configured to write the audio samples that match the predetermined pattern and subsequently-received samples to memory through the memory controller subsequent to powering up the memory controller in response to detecting the predetermined pattern; and

    the first circuit comprises a buffer configured to store a plurality of the audio samples, wherein a number of the plurality of audio samples is sufficient to store the audio samples that match the predetermined pattern and the subsequently-received samples until the memory controller is available to receive writes of the audio samples to the memory.

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