Patent · US Active

Synchronizing video signals using cached key frames

US10805615B2 · kind B2 · utility

0Cited by

2References

23Claims

0Family size

Assignee

LogMeln, Inc. · US

Inventors

Steffen Schulze · Wappingers Falls, US
Eugen Wige · Dresden, DE

Key dates

Filing date	Dec 14, 2016
Grant date	Oct 13, 2020
Priority date	—
Expiry date	Jun 30, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH04N21/6379
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A technique for synchronizing video receivers with a video stream already in progress includes caching a key frame in a transport protocol component of a video communication system and providing the key frame on demand to any receiver attempting to join the stream and/or to rejoin the stream after an error, such as a dropped packet. Once a receiver obtains the key frame, the receiver requests that the source of the video stream issue a new sync-point frame, where the sync-point frame depends on the key frame but on no other frame for its content. The receiver may then proceed to display rendered video beginning with the sync-point frame.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.