forward error correction

RU: коррекция ошибок

Forward error correction: a technique where the sender adds redundant packets derived from source data (e.g. an XOR parity packet over a group of N packets) so the receiver can reconstruct a lost packet without requesting retransmission. FEC trades extra bandwidth for lower latency, making it valuable for real-time video or unreliable last-mile links where retransmission delay is unacceptable.