The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jun. 11, 2019

Filed:

Aug. 18, 2017
Applicant:

Media Links Co., Ltd., Kawasaki-shi, Kanagawa, JP;

Inventors:

Takeshi Shimizu, Kawasaki, JP;

Kazuki Narita, Kawasaki, JP;

Assignee:

MEDIA LINKS CO., LTD., Kawasaki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J 3/06 (2006.01); H04N 21/242 (2011.01);
U.S. Cl.
CPC ...
H04J 3/0667 (2013.01); H04J 3/0641 (2013.01); H04J 3/0644 (2013.01); H04J 3/0676 (2013.01); H04N 21/242 (2013.01);
Abstract

A time synchronization system includes master nodes and slave nodes configured to correct a local slave clock by synchronizing time with time in a local master clock. A first master node corrects a first local master clock at predetermined periodic intervals by synchronizing with a timing synchronization signal from a source clock node having a source clock. If a second local master clock has a greater error from the source clock than the error in the first local master clock, the second master node performs first correction by synchronizing time with time in the first local master clock and performs second correction by synchronizing with the timing synchronization signal from the source clock node on condition that an error in the second local master clock is within a predetermined range after the first correction has been performed.


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