Facebook Technologies, LLC

Facebook, Inc.

Meta Platforms Technologies, LLC

Paul Austin Buckley

Chengyuan Yan

Adrian Brian Ratter

Boyang Zhang

Jack Hood Profit, Jr

Jason Andrew Higgins

Dov Katz

In one embodiment, a method includes receiving, from a controller, a data packet including (1) a plurality of samples each corresponding to measurements from a motion sensor and (2) a timestamp corresponding to a measurement time of one of the samples as measured by a clock of the controller; determining, based on the timestamp, an estimated measurement time relative to a local clock for each of the plurality of samples that is not associated with the timestamp; and converting each of the timestamp and the estimated measurement times to a corresponding synchronization time using a learned relationship relating the clock of the controller and the local clock. The learned relationship is iteratively learned based on previously received data packets from the controller. The synchronization time associated with each of the plurality of samples represents an estimated time, relative to the local clock, at which the sample was measured.

Headset clock synchronization

In one embodiment, a method includes receiving motion data from a motion sensor during a packet-transmission interval of a wireless protocol. The motion data corresponds to a first pre-determined number of samples measured at a first sampling frequency. Each sample is associated with a first timestamp corresponding to a measurement time of that sample during the packet-transmission interval. The method also includes converting the motion data to correspond to a second pre-determined number of samples. The second pre-determined number is fewer than the first pre-determined number. The method also includes determining a second timestamp for each of the second pre-determined number of samples. The second timestamps are within the packet-transmission interval and represent measurement times at a second sampling frequency that is lower than the first sampling frequency. The method also includes combining the converted motion data and the corresponding second timestamps into a first data packet.

Sensor data compression

A hand-held controller for a virtual-reality system includes an antenna, a grip, a cage coupled to the grip, and a plurality of LEDs on an outer surface of the cage. Wireless signals are received from a remote camera via the antenna. The plurality of LEDs is duty-cycled, which includes turning on the plurality of LEDs at times determined using the wireless signals. The times when the plurality of LEDs is turned on correspond to times when the remote camera captures images of the hand-held controller.

Hand-held controllers with light-emitting diodes synchronized to an external camera

Growing community of inventors

Seattle, WA, United States of America

Paul Austin Buckley