US 12,413,803 B2
Reproduction device, time correction method, and program
Eisaku Ishii, Tokyo (JP)
Assigned to Sharp NEC Display Solutions, Ltd., Tokyo (JP)
Filed by Sharp NEC Display Solutions, Ltd., Tokyo (JP)
Filed on Aug. 29, 2022, as Appl. No. 17/897,616.
Application 17/897,616 is a continuation of application No. PCT/JP2020/009671, filed on Mar. 6, 2020.
Prior Publication US 2022/0417584 A1, Dec. 29, 2022
Int. Cl. H04L 7/00 (2006.01); H04N 21/43 (2011.01)
CPC H04N 21/4302 (2013.01) [H04L 7/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A reproduction device comprising:
a timer configured to count an internal device time;
a time correction calculator configured to acquire a reference time from outside at a timing determined in advance and to synchronize the internal device time with the reference time; and
a time corrector configured to calculate a time correction coefficient defined using a change rate of a time difference between the reference time and the internal device time at a timing different from the timing determined in advance, the time corrector configured to calculate a corrected time by correcting the internal device time using the time correction coefficient,
wherein the time corrector calculates the change rate of the time difference in a period from a timing synchronized with the time difference of a power-off timing to power off at a timing at which a power-off operation is performed and stores the change rate as the time correction coefficient applied to a timing at which a next power-on operation is performed.