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Adaptive two-stage FEC scheme for scalable video transmission over wireless networks / Yufeng Shan in Signal processing. Image communication, Vol. 24 N° 9 (Octobre 2009) 

Public ISBD [article]  in Signal processing. Image communication > Vol. 24 N° 9 (Octobre 2009) . - pp. 718-729 Titre : Adaptive two-stage FEC scheme for scalable video transmission over wireless networks Type de document : texte imprimé Auteurs : Yufeng Shan, Auteur ; Su Yi, Auteur ; Shivkumar Kalyanaraman, Auteur Article en page(s) : pp. 718-729 Note générale : Electronique Langues : Anglais (eng) Mots-clés : Wireless  FEC  Video  streaming  Cross-layer  Scalable Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs 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%23 [...] [article] Adaptive two-stage FEC scheme for scalable video transmission over wireless networks [texte imprimé] / Yufeng Shan, Auteur ; Su Yi, Auteur ; Shivkumar Kalyanaraman, Auteur . - pp. 718-729. Electronique Langues : Anglais (eng) in Signal processing. Image communication > Vol. 24 N° 9 (Octobre 2009) . - pp. 718-729 Mots-clés : Wireless  FEC  Video  streaming  Cross-layer  Scalable Index. décimale : 621.382 Dispositifs électroniques utilisant les effets des corps solides. Dispositifs semi-conducteurs 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%23 [...]