Patent ID: 11862173
Assignee: APPLE INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 18:
19. A system comprising:
a plurality of microphones;
an audio coder/decoder (codec) coupled to the plurality of microphones and configured to generate audio samples from sound detected by the plurality of microphones;
a memory; and
an integrated circuit coupled to the audio codec and the memory, wherein the integrated circuit includes a first circuit, one or more processors, and a memory controller coupled to the memory;
the first circuit is configured to:
detect a predetermined pattern in the audio samples from the audio codec during a time that the memory controller and the one or more processors are powered down;
cause the memory controller and the one or more processors to power up responsive to detecting the predetermined pattern; and
buffer the audio samples that match the predetermined pattern and subsequently received samples until the memory controller is available to write the audio samples to the memory; and

the audio codec is configured to deactivate one or more of the plurality of microphones during the time that the memory controller and the one or more processors are powered down, wherein the audio samples during the time are sampled from active ones of the plurality of microphones.