Patent · US Active

System and method for correcting network loss of data

US11706456B2 · kind B2 · utility

0Cited by

4References

6Claims

0Family size

Assignee

Agora Lab, Inc. · US

Inventors

Rui Wang · Tangxia, CN
Liang Si · Shanghai, CN
Bifeng He · Shanghai, CN

Key dates

Filing date	Aug 15, 2022
Grant date	Jul 18, 2023
Priority date	—
Expiry date	Aug 15, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/89
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A reference-order AL-FEC system for recovering network video data packet loss during real-time video communication includes a packetizer, a reference-order AL-FEC encoder, a reference-order AL-FEC decoder and a depacketizer. The packetizer constructs source symbols from source packets of a current frame. The encoder generates a repair symbol from the source symbols of the current frame and other reference frames based on the reference-order, not time-order, between the frames within an encoding window. The encoder also generates a repair packet based on the repair symbol. The decoder recovers a lost source symbol based on the source symbols of the frames of the encoding window and the repair symbol by decoding the repair packet. The decoding is achieved by solving a linear system of the repair symbol.

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