초록 ▼

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 packe

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.

대표청구항 ▼

[ What is claimed is:] [1.] A method for applying forward error correction to media packets in a transmission network, comprising the steps ofchoosing an error correcting code at a transmitter;generating a set of FEC packets, each FEC packet containing an offset bitmask associating the FEC packet wi

[ What is claimed is:] [1.] A method for applying forward error correction to media packets in a transmission network, comprising the steps ofchoosing an error correcting code at a transmitter;generating a set of FEC packets, each FEC packet containing an offset bitmask associating the FEC packet with a media packet and containing a field sufficient to impart the chosen error-correcting code to at least one FEC-capable receiver;sending the packet stream, consisting of media packets and FEC packets, to the FEC-capable receiver; anddecoding the packet stream at the FEC-capable receiver, generating media packets as a result.