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:
Jan. 03, 2023

Filed:

Mar. 08, 2021
Applicant:

Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;

Inventors:

Miljenko Opsenica, Espoo, FI;

Le Wang, Helsinki, FI;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 21/43 (2011.01); H04B 10/116 (2013.01); H04W 72/12 (2009.01); H04L 43/04 (2022.01); H04W 56/00 (2009.01);
U.S. Cl.
CPC ...
H04N 21/4305 (2013.01); H04B 10/116 (2013.01); H04L 43/04 (2013.01); H04N 21/4302 (2013.01); H04N 21/43072 (2020.08); H04W 56/0015 (2013.01); H04W 72/1263 (2013.01);
Abstract

A system clock reference is transmitted to user devices over a short range communication channel and used to calculated a clock offset. The clock offset is stored together with a user identifier in a server memory, from which the clock offset can be retrieved when receiving the user identifier together with a video stream of video frames tagged with respective timestamps. The timestamps are converted into capture times according to a system clock using the retrieved clock offsets. Video streams from multiple user devices thereby have video frames timestamped using a same clock reference and can be time aligned.


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