Always-On Audio Control for Mobile Device

摘要

In an embodiment, an integrated circuit may include one or more CPUs, a memory controller, and a circuit configured to remain powered on when the rest of the SOC is powered down. The circuit may be configured to receive audio samples from a microphone, and match those audio samples against a predetermined pattern to detect a possible command from a user of the device that includes the SOC. In response to detecting the predetermined pattern, the circuit may cause the memory controller to power up so that audio samples may be stored in the memory to which the memory controller is coupled. The circuit may also cause the CPUs to be powered on and initialized, and the operating system (OS) may boot. During the time that the CPUs are initializing and the OS is booting, the circuit and the memory may be capturing the audio samples.

主权项

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, and wherein 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, and wherein 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, and wherein 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.