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With the increase of the demands of mobile multimedia services, the real-time multimedia services such as IPTV often require the support of Mobile Multimedia Multicast (MMM) communications in the IP-based wireless networks. Since the MMM services often require a strict delay-bounded transport that guarantees quasi error free (QEF) transmission, we will investigate how to satisfy the QEF requirements...
Cognitive Radio (CR) technologies have been proposed as a promising solution to improve connectivity, self-adaptability, and efficiency of spectrum usage by using dynamic spectrum resource management. When used in multimedia applications in wireless networks, the end-to-end user-perceived video quality experienced by secondary users is a very important performance metric to evaluate the effectiveness...
Providing real-time multimedia services over a besteffort network is challenging due to the stringent delay requirements in the presence of complex network dynamics. Multiple description (MD) coding is one approach to transmit the media over diverse (multiple) paths to reduce the detrimental effects caused by path failures or delay. The novelty of this work is to investigate the resource allocation...
Robust streaming of video over wireless networks poses many challenges, as coping with bandwidth variations,data losses, and heterogeneity of the receivers. Rate-distortion (RD) optimization studies are aimed at increasing the reliability of received bitstreams, by selecting the opportunistic system parameters based on the channel conditions and the RD curve. One of the main challenges in the RD optimization...
Most of the existing video streaming systems employ the worst case analysis in application layer buffer size dimensioning. Even though the worst case buffer size dimensioning provides deterministic quality of service (QoS) guarantees that are desirable in multimedia transmission, however, this also over-provisions the scarce memory resources. In this paper, we propose a dynamic technique for buffer...
Media-based services often require a multicast-enabled transport that guarantees quasi error free transmission under strict delay constraints. In packet based networks, furthermore, both multicast and delay constraints deeply influence the architecture of erasure error recovery. Therefore, we propose a general architecture and study its optimization in this paper. Since the Gilbert-Elliot (GE) erasure...
A scheme that exploits the broadcast nature of the wireless communication in order to achieve multicast content delivery is presented in this paper. As opposed to broadcasting, this method enables the clients to determine on-line the delivered content, and thus preserves the advantages of an individual service. On the other hand, a multicast content delivery is much more efficient than a unicast content...
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