초록 ▼

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 cor

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.

대표청구항 ▼

[ We claim:] [1.] A method for communicating payload in a digital transmission system, said payload being divided into a sequence of payload packets, PL[k-w], . . . , PL[k-1], PL[k-2], PL[k], PL[k+1], . . . , PL[k+u], said method comprising, in combination:to each payload packet PL[k], appending a f

[ We claim:] [1.] A method for communicating payload in a digital transmission system, said payload being divided into a sequence of payload packets, PL[k-w], . . . , PL[k-1], PL[k-2], PL[k], PL[k+1], . . . , PL[k+u], said method comprising, in combination:to each payload packet PL[k], appending a forward error correction code FEC[k] comprising the XOR sum of a predetermined number of preceding payload packets, said predetermined number being greater than 1, said payload packet PL[k] and said forward error correction code FEC[k] defining, in combination, a packet P[k]; andtransmitting a sequence of said packets P[k], P[k+1], . . . , P[k+u] from a first device in said digital transmission system for receipt by a second device in said digital transmission system.