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

Claim 16:
17. A method for a first electronic device comprising:
transmitting a first signal over a shared medium, wherein the first signal comprises network synchronization data and marker data;
transmitting a second signal on a first frequency;
performing network-based synchronization with a second electronic device, wherein a clock of the second electronic device is updated based on the network synchronization data, wherein the network synchronization data comprises: a network-based time stamp, x, and a corresponding accuracy of the network-based time stamp, δt;
wherein the marker data comprises: a rate of frequency change of the second signal comprising:

x+∝·m·δt,

where ∝ is a settable value greater than 2, and m is an integer;
determining that the marker data is satisfied at a time marker; and
based on the determination, transmitting the second signal on second frequency, where the second frequency is different than the first frequency,
wherein the second electronic device detects a frequency change of the second signal, and updates the clock of the second electronic device based on: the time marker, the network synchronization data, and the marker data.