| Titre : | Adaptive two-stage FEC scheme for scalable video transmission over wireless networks |
| Auteurs : | Yufeng Shan, Auteur ; Su Yi, Auteur ; Shivkumar Kalyanaraman, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Signal processing. Image communication (Vol. 24 N° 9, Octobre 2009) |
| Article en page(s) : | pp. 718-729 |
| Note générale : | Electronique |
| Langues : | Anglais |
| Index. décimale : | 621.382 (Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs) |
| Tags : | Wireless FEC Video streaming Cross-layer Scalable |
| Résumé : |
In this paper, we present a two-stage forward error correction (FEC) scheme with an enhanced link-layer protocol especially for multimedia data transmission over wireless LANs.
At the application layer, packet-level FEC (stage-one) is added across packets to correct packet losses due to congestion and route disruption. Bit-level FEC (stage-two) is then added to both application packets and stage-one FEC packets to recover bit errors from the link layer. Then at the link layer, header-CRC/FEC is used to enhance protection and to cooperate with the two-stage FEC scheme. The proposed scheme thus provides joint protection across the protocol stack. We explore both its bandwidth efficiency and video performance for the highly efficient and scalable MC-EZBC video codec using the network simulator ns-2. Our results show that the proposed scheme can effectively increase application-layer throughput, reduce both end-to-end transmission delay and application bandwidth fluctuation, and significantly improve video performance. |
| DEWEY : | 361.382 |
| ISSN : | 0923-5965 |
| En ligne : | http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235640%232009%23999759990%231477065%23FLA%23&_cdi=5640&_pubType=J&_auth=y&_acct=C000070790&_version=1&_urlVersion=0&_userid=6909337&md5=f54abdbee9665c1c561eefd05020b827 |
