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

Claim 9:
10. A non-transitory computer-readable medium storing instructions that, when executed by a processor of a first electronic device, cause the processor to perform operations, the operations comprising:
receiving from a second electronic device, a first signal comprising data: a network-based time stamp, a corresponding accuracy of the network-based time stamp, and marker data;
performing 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;
receiving a second signal at a first frequency;
detecting, via phase lock loop (PLL) synchronization, a frequency change of the second signal based on the marker data, wherein the frequency change of the second signal identifies a time marker;
determining 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
updating the first clock based at least on the relative accuracy.