Forward error correction system for packet based real time media

Details Forward error correction system for packet based real time media Forward error correction system for packet based real time media

1997-12-12

1999-02-09

Canney, Vincent P.

Excavating

G06F 1100

Patent

active

058704124

ABSTRACT:
A computationally simple yet powerful forward error correction code scheme for transmission of real-time media signals, such as digitized voice, video or audio, in a packet switched network, such as the Internet. The invention appends to each of a series of payload packets a single forward error correction code that is defined by taking the XOR sum of a preceding specified number of payload packets. The invention thereby enables correction from the loss of multiple packets in a row, without significantly increasing the data rate or otherwise delaying transmission.

REFERENCES:
patent: 5115436 (1992-05-01), McAuley
patent: 5608738 (1997-03-01), Matsushita
McAuley, Anthony J., "Reliable Broadband Communication Using A Burst Erasure Correcting Code", Bellcore Computer Communication Research Group (1990), pp. 297-306.
Nonenmacher, Jorg et al., "Parity-Based Loss Recovery for Reliable Multicast Transmission" (1997), pp. 289-300.
Feher, Kamilo "Wireless Digital Communications: Modulation and Spread Spectrum Applications" (1995), chapter 5, pp. 254-284.
Sherman, Ken, "Packet Switching", Data Communications (1990), chapter 17, pp. 384-407.

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