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Research >> Scalable Video for Wireless Communications
DescriptionHigh speed packet access (HSPA) technologies such as HSDPA/HSUPA in third and fourth generation (3G/4G) wireless networks will have the capability to support heterogeneous compressed video traffic with transmission speeds reaching up to 14.4 Mbps on the downlink channel and 5.8 Mbps on the uplink channel. Wireless video transmission applications can be divided into two main categories: downlink streaming services such as mobile TV, and down/uplink conversational services such as video conferencing, which are characterized by bandwidth-intensity, delay-sensitivity, and loss-tolerance. Our research tackles the power, bandwidth, and protection allocation necessary to overcome the packet loss and limited capacity of wireless channels and the limited battery life of mobile devices.
Our projects:
Scalable Video: We address the case of transmitting scalable video data to multiple users over wireless networks that suffer from packet loss, variable packet delivery delay, and limited capacity. These challenges constitute the general difficulties facing wireless video streaming and conversational applications. We are currently treating the problem of channel-aware and delay-aware multi-user scalable video streaming with optimized unequal erasure protection (UXP) over HSPDA networks, taking into account capacity constraints, device heterogeneity, quality of service (QoS) guarantees, and packet delivery delays. We have also developed a loss-distortion model for hierarchically predictive video codecs and successfully used our model in the multi-user rate-allocation framework. The objective is to dynamically allocate unequal error protection and scalable video bit-rate to the multiple users accessing the downlink channel while satisfying the time varying channel capacity, delay, and QoS guarantees. In order to enable efficient uplink services, the following additional considerations should be met:
1. Developing accurate channel capacity estimates and introducing the effect of the media access control (MAC) layer scheduling and admission control policies to further improve multi-user bit-rate allocation.
2. Derivation of real-time rate-distortion models for spatial, temporal, and quality scalable coded video streams. These models enable streaming servers and conversational service controllers optimize the encoding and rate-allocation strategies based on the underlying network conditions and the expected video characteristics.
3. Transmission power management of uplink mobile devices to perform wirless resource allocation and user scheduling in HSUPA systems.
We wish to address the above mentioned requirements for video transmission over third and fourth generation mobile HSPA networks by designing and implementing resource allocation and scheduling architectures that can improve the quality performance of wireless multimedia applications.
Selected Publications:
- H. Mansour, Y. P. Fallah, P. Nasiopoulos, and V. Krishnamurthy, “Dynamic Resource Allocation for MGS H.264/AVC Video Transmission over Link-Adaptive Networks,” IEEE Transactions on Multimedia, Vol. 11, No. 8, 30 pages, December 2009.
- H. Mansour, Y. Fallah, P. Nasiopoulos and V. Krishnamurthy, “Combined Link Adaptation and Traffic Control Scheme for MGS H.264/AVC Video Transmission”, IEEE 16th International Conference on Digital Signal Processing (DSP) 2009, pp. 1 - 6, July 2009.
- H. Mansour, P. Nasiopoulos, V. Krishnamurthy, “Rate and Distortion Modeling of Medium Grain Scalable Video Coding”, 4 proc. pages, IEEE International Conference on Image Processing (ICIP) 2008, San Diego, October 2008.
- H. Mansour, V. Krishnamurthy, P. Nasiopoulos, “Delay-Aware Rate Control for Multi-User Scalable Video Streaming,” 4 proc. Pages, IEEE PIMRC 2008, France, September 2008.
- H. Mansour, V. Krishnamurthy, P. Nasiopoulos, “Channel Aware Multi-User Scalable Video Streaming over Lossy Under-Provisioned Channels: Modeling and Analysis”, IEEE Transactions on Multimedia, Vol. 10, No. 7, pp. 1366 – 1381, November 2008.
- Y. P. Fallah, H. Mansour, S. Khan and P. Nasiopoulos, “An Optimized Link Adaptation Scheme for Efficient Delivery of Scalable H.264 Video over IEEE 802.11n”, IEEE International Symposium on Circuits and Systems (ISCAS) 2008, pp. 2058 – 2061, May 2008.
- Y. P. Fallah, S. Khan, P. Nasiopoulos and H. Alnuweiri, “Hybrid OFDMA/CSMA Based Medium Access Control for Next-Generation Wireless LANs”, IEEE International Conference on Communications (ICC) 2008 - Wireless Communications Symposium, pp. 2762 – 2768, China, May 2008.
- H. Mansour, P. Nasiopoulos and V. Krishnamurthy, “Joint Media-Channel Aware Unequal Error Protection for Wireless Scalable Video Streaming”, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2008, pp. 1129 – 1132, Las Vegas, April 2008.
- Y. P. Fallah, H. Mansour, S. Khan, P. Nasiopoulos and H. Alnuweiri, “A Link Adaptation Scheme for Efficient Transmission of H.264 Scalable Video over Multirate WLANs”, IEEE Transactions on Circuits and Systems for Video Technology, Vol. 18, No. 7, pp. 875 – 887, July 2008.
- H. Mansour, V. Krishnamurthy and P. Nasiopoulos, “Channel Adaptive Multi-User Scalable Video Streaming with Unequal Erasure Protection”, 8th International Workshop on Image Analysis and Multimedia Interactive Services (WIAMIS), pp. 54 – 57, June 2007.
- H. Mansour, P. Nasiopoulos and V. Leung, “Multiple Description Coding of the Scalable Extension of H.264/AVC (SVC)”, IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) 2006, pp. 519 – 523, Vancouver, August 2006.
- H. Mansour, P. Nasiopoulos and V. Krishnamurthy, “Modeling of Loss-Distortion in Hierarchical Prediction Codecs”, IEEE International Symposium on Signal Processing and Information Technology (ISSPIT) 2006, pp. 536 - 540, Vancouver, August 2006.
- H. Mansour, P. Nasiopoulos and V. Leung, “Efficient Multiple Description Scalable Coding Using Subband Extension of H.264/AVC”, IEEE International Symposium on Circuits and Systems (ISCAS) 2005, pp. 4042 - 4045, Kobe, Japan, May 2005.
- P. Nasiopoulos, L. Coria, A. Golikeri, H. Mansour, “An Improved Error Concealment Algorithm for Intar-frames in H.264/AVC”, IEEE International Symposium on Circuits and Systems (ISCAS) 2005, Vol. 1, pp. 320 - 323, Kobe, Japan, May 2005.
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