Patent ID: 11936765
Assignee: ROKU, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A first electronic device, comprising:
a transceiver configured to receive wireless communications over a shared medium from a second electronic device;
a processor, coupled to the transceiver, configured to:
receive a first signal via the shared medium comprising data: a network-based time stamp, a corresponding accuracy of the network-based time stamp, and marker data;
perform network-based synchronization with the second electronic device based on the network-based time stamp and the corresponding accuracy of the network-based time stamp, to synchronize a first clock of the first electronic device to a second clock of the second electronic device within the corresponding accuracy of the network-based time stamp;
receive a second signal at a first frequency;
detect, via a phase lock loop (PLL) circuit coupled to the processor, a frequency change of the second signal based on the marker data, wherein the frequency change of the second signal identifies a first time marker;
determine a relative accuracy based at least on the first time marker, the marker data, the network-based time stamp, and the corresponding accuracy of the network-based time stamp; and
update the first clock based at least on the relative accuracy.