Reed-Solomon Codes and Their Applications
Reed-Solomon Codes and Their Applications
Error-Correction Coding for Digital Communications
Error-Correction Coding for Digital Communications
Measuring the Impact of Slow User Motion on Packet Loss and Delay over IEEE 802.11b Wireless Links
LCN '03 Proceedings of the 28th Annual IEEE International Conference on Local Computer Networks
Modeling wireless links for transport protocols
ACM SIGCOMM Computer Communication Review
MIMO Wireless Communications
Channel characteristics and transmission performance for various channel configurations at 60 GHz
EURASIP Journal on Wireless Communications and Networking
Binary erasure codes for packet transmission subject to correlated erasures
PCM'06 Proceedings of the 7th Pacific Rim conference on Advances in Multimedia Information Processing
Modeling packet-loss visibility in MPEG-2 video
IEEE Transactions on Multimedia
IEEE Transactions on Information Theory
Increasing the user perceived quality for IPTV services
IEEE Communications Magazine
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
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Video content can be provided to an end user by transmitting video data as a sequence of internet protocol (IP) packets over the network. When the network contains a wireless link, packet erasures occur because of occasional deep fades. In order to maintain a sufficient video quality at the end user, video packets must be protected against erasures by means of a suitable form of error control. In this contribution, we investigate two types of error control: (1) forward error correction (FEC), which involves the transmission of parity packets that enables recovery of a limited number of erased video packets, and (2) the use of an automatic repeat request (ARQ) protocol, where the receiver requests the retransmission of video packets that have been erased. We point out that FEC and ARQ considerably reduce the probability of unrecoverable packet loss, because both error control techniques provide a diversity gain, as compared to the case where no protection against erasures is applied. We derive a simple analytical expression for the diversity gain resulting from FEC or ARQ, in terms of the channel coherence time, the allowable latency, and (for FEC) the allowable overhead or (for ARQ) the time interval between (re)transmissions of copies of a same packet. In the case of HDTV transmission over a 60GHz indoor wireless link, ARQ happens to outperform FEC.