Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Patent
1998-10-13
2000-10-31
Baker, Stephen M.
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
714776, H03M 1311, H03M 1335
Patent
active
061417882
ABSTRACT:
A method for applying forward error correction in a transmission network includes the steps of choosing one of a plurality of possible error correction codes, using an appropriate field to encode a complete forward-error-correcting (FEC) code algorithm in each FEC packet to be transmitted. The packet stream, consisting of media packets and FEC packets can be sent to both FEC-capable and FEC-incapable receivers. Decoding methods are independent of the forward-error-correcting code transmitted. The sender can adapt the forward-error-correction code algorithm and the degree of error correction provided on a one-time basis or even more dynamically. Decoding and recovery at the receiver require no prior notification from the sender. Applying the FEC code algorithm to decode includes interrogating the bits in an offset bit mask in each FEC packet to yield links with media packets, and applying other fields of the FEC header to obtain instructions to recover lost data in one of the media packets. Based thereon, reiterative decoding of media packets ensures that lost data recoverable with combinations of media packets and FEC packets are recovered.
REFERENCES:
patent: 5600663 (1997-02-01), Ayanoglu et al.
patent: 5699369 (1997-12-01), Guha
patent: 5724345 (1998-03-01), Guarneri et al.
patent: 5883891 (1999-03-01), Williams et al.
patent: 5917835 (1999-06-01), Barrett et al.
patent: 5936949 (1999-08-01), Pasternak et al.
patent: 6012159 (2000-01-01), Fischer et al.
C. Perkins et al., RTP Payload for Reduncant Audio Data, pp. 1-10, Sep., 1997, Network Working Group,Request for Comments (RFC) 2198, Category: Standards Track, at ftp://ftp.isi.edu/in-notes/rfc2198.txt.
C. Perkins, Options for Repair of Streaming Media, pp. 1-12, Jun., 1998, Internet Draft. Internet Engineering Force, RFC 2354.
J. C. Bolot et al., The case for fec-based error control for packet audio in the internet, 21 pages in 10 parts, Multi-media Systems, Jan., 19, 1997.
D. Budge et al., Media-independent Error Correction Using RTP, pp. 1-16, May, 1997, Internet Draft, Internet Engineering Task Force.
H. Schulzrinne et al., RTP: A Transport Protocol for Real-Time Applications, pp. 1-63, Jan., 1996, an internet standard (RFC 1889).
H. Schulzrinne et al., RTP Profile for Audio and Video Conferences with Minimal Control, pp. 1-17, Jan., 1996, Network Working Group (proposed standard) (RFC 1890).
J. Rosenberg et al., An RTP Payload Format for Generic Forward Error Correction, pp. 1-15, Mar. 9, 1998, Internet Draft, Internet Engineering Task Force, Work in progress.
Rosenberg Jonathan David
Schulszrinne Henning Gunther
Baker Stephen M.
Lucent Technologies - Inc.
Wisner Wilford L.
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