An end-to-end embedded approach for multicast/broadcast of scalable video over multiuser CDMA wireless networks

作者：Chan Yee Sin^*; Modestino James W; Qu Qi; Fan Xingzhe

来源：IEEE Transactions on Multimedia, 2007, 9(3): 655-667.

DOI：10.1109/TMM.2006.887993

• adaptive modulation and coding
• code-division multiple access (CDMA)
• cross-layer
• drift control
• embedded transmission
• H.263+
• joint source-channel coding
• joint source coding-power control
• multicast/broadcast
• turbo codes
• wireless video

We investigate an embedded multicast/broadcast approach for transport of digital video over spread-spectrum code-division multiple access (CDMA) cellular networks. Previous work has shown that the incorporation of a scalable source coding scheme with multiresolution modulation provides a promising design paradigm for the practical realization of the information-theoretic performance predictions originally developed by Cover [1], which demonstrated that optimal multicast/broadcast performance could be achieved by an embedded transmission scheme. Hence, the major technical challenge associated with the design of an end-to-end embedded multicast/broadcast system is how to match an embedded modulation constellation with a scalable source coding scheme. In this work, taking into consideration both the interference-limited and bandwidth-limited characteristics of a CDMA system, we provide a cross-layer approach incorporating adaptive power allocation and channel coding strategies and effectively match a discrete cosine transform based scalable motion-compensated video encoder to an embedded multiresolution modulation scheme to simultaneously deliver a basic quality-of-service (QoS) to less capable receivers while maximizing both the QoS for more capable receivers and the system capacity. We demonstrate the efficacy of this approach using the ITU-T H.263+ video scalable hybrid coder, although the approach is generally extensible to other scalable coding schemes as well.

• 出版日期2007-4