Patent ID: 11910171
Assignee: APPLE INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A smart speaker comprising:
a processing system comprising at least one digital signal processor configured to decode an encoded audio file to produce an audio bitstream;
at least one digital to analog converter coupled to the at least one digital signal processor and configured to convert the audio bitstream to an analog audio signal;
at least one audio amplifier coupled to the at least one digital to analog converter and configured to amplify the analog audio signal;
an audio power supply configured to receive an input voltage and provide an output voltage powering the at least one audio amplifier; and
an audio power supply controller coupled to the at least one digital signal processor or the at least one digital to analog converter and configured to:
identify an increased or a decreased energy requirement in an upcoming portion of the audio signal;
responsive to an increased energy requirement in an upcoming portion of the audio signal, increase a power supply voltage supplied to the at least one audio amplifier and increase a look ahead time period before the increased energy requirement; and
responsive to a decreased energy requirement in an upcoming portion of the audio signal, decease the power supply voltage supplied to the at least one audio amplifier.