ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,452,621, issued on Oct. 21, was assigned to Amazon Technologies Inc. (Seattle).
"Multi-device localization and ranging" was invented by Spencer Russell (Quincy, Mass.) and Carlos Renato Nakagawa (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system configured to create a flexible home theater group using a variety of different devices. To enable synchronized audio output, the system performs device localization to generate map data representing locations of the devices. The system determines distance values between devices using timing information generated during calibration even when the devices themselves may not have synchronized...