Abstract: A signal protector utilizes a dual data path delay offset enabling signal recovery on both paths following simultaneous data loss on both paths.
Abstract: This invention concerns packet recovery for real-time (live) multi-media communication over packet-switched networks like the Internet. Such communication includes video, audio, data or any combination thereof. The invention comprises forward error correction (FEC) algorithms addressing both random and burst packet loss and errors, and that can be adjusted to tradeoff the recoverability of missing packets and the latency incurred.
Type:
Grant
Filed:
May 22, 2012
Date of Patent:
June 25, 2013
Assignee:
Nevion USA, Inc.
Inventors:
Peter Michael Melliar-Smith, Louise Elizabeth Moser, Chin Chye Koh
Abstract: This invention relates generally to a packet recovery algorithm for real-time (live) multi-media communication over packet-switched networks, such as the Internet. Such multi-media communication includes video, audio, data or any combination thereof. More specifically, the invention comprises a forward error correction (FEC) algorithm that addresses both random and burst packet loss and errors, and that can be adjusted to tradeoff the recoverability of missing packets and the latency incurred. The transmitter calculates parity packets for the rows, columns and diagonals of a block of multi-media data packets using the exclusive or (XOR) operation and communicates the parity packets along with the multi-media data packets to the receiver. The receiver uses the parity packets to recover missing multi-media data packets in the block. The FEC algorithm is designed to be able to recover long bursts of consecutive missing data packets.
Type:
Grant
Filed:
January 22, 2009
Date of Patent:
July 24, 2012
Assignee:
Nevion USA, Inc.
Inventors:
Peter Michael Melliar-Smith, Louise Elizabeth Moser, Chin Chye Koh