Method and apparatus for time synchronization between head-mounted device and peripheral device

An apparatus of a peripheral device for time synchronization between a head mounted device and the peripheral device, the apparatus comprising:

• a processing unit configured to obtain sample data of an Inertial measurement unit of the peripheral device, and determine a first timestamp representing a time at which the sample data is sampled:
• a transmission interrupt unit configured to transmit an interrupt request and the sample data to the head-mounted device, and determine a second timestamp representing a time at which the interrupt request is transmitted:
• a determination unit configured to determine, by obtaining a reading time at which the sample data is read as recorded by the head-mounted device, a third timestamp representing a time at which the interrupt request is received by the head-mounted device:
• and
• a difference compensation unit configured to determine a time difference based on the third timestamp and the second timestamp, and perform time compensation on for the first timestamp based on the time difference to enable the peripheral device and the head-mounted device to complete the time synchronization with a untiled time standard,
• wherein the difference compensation unit is configured to calculate a first difference between the third timestamp and the second timestamp;
• and
• calculate a second difference between the first difference and a transmission consumption time obtained, by the apparatus, in advance, and determine the second difference as the time difference.