The theme of this research project is to design wireless networks that are capable of yielding an increase of video transmission capacity of roughly two orders of magnitude. We make use of combinations of techniques drawn from the disciplines of compression, signal processing, communications theory, and network theory. Much of what we do is based around the use of cross-layer techniques at the physical, MAC, network, and application layers. A second major approach is based around determining appropriate perceptually-based metrics of video quality to allow unequal error protection, and concealing lost information at the destination by perceptually-based interpolation methods. Applications include both 2D and 3D stereo video. Our intention is for this research to encompass wireless systems at all levels of mobility: fixed wireless, pedestrian speeds, and vehicular speeds.
Among our current research directions are the following:
- Develop efficient, robust, and optimal compression algorithms based on a video-plus-depth format for 3D video, taking into the account spatiotemporal organization of depth processing by the human visual system.
- Derive cross-layer algorithms that are robust for arbitrary mobility and a diverse set of scenarios such as two-way interactive video, archival video streaming, and buffer assisted multiple-user resource allocation.
- Design a novel wireless video cloud architecture, and associated algorithms, to enable delivery of online videos to mobile users with reduced video latency and increased network capacity. In particular, we intend to (a) include distributed processing together with caching, (b) utilize adaptive bit rate streaming techniques, and (c) extend caching to mobile devices.
[J-1] N. H. Jacobson, E. R. Schotter, Y. Liu, A. C. Bovik, K. Rayner, and T. Q. Nguyen, "The effect of stereoscopic depth on saliency: More evidence from eye movements," submitted to Journal on Vision, June 2012.
[J-2] Y.-L. Chang, T.-L. Lin, and P. C. Cosman, "Network-based H.264 whole frame loss visibility model and frame dropping methods," submitted to IEEE Transactions on Image Processing, 2011.
[J-3] D. Wang, P. C. Cosman, and L. B. Milstein, "Uplink resource management for multiuser OFDM video transmission systems: Analysis and algorithm design," submitted to IEEE Transactions on Communications, 2011.
[J-4] H. Kim, P. C. Cosman, and L. B. Milstein, "Motion-compensated scalable video transmission over MIMO wireless channels, " to apprear in IEEE Transactions on Circuits and Systems for Video Technology.
[J-5] L. Toni, P. C. Cosman, and L. B. Milstein, "Channel Coding Optimization Based on Slice Visibility for Transmission of Compressed Video over OFDM Channels," IEEE Journal on Selected Areas in Communications, vol. 30, no. 7, pp. 1172--1183, August 2012.
[C-1] L. Toni, P. C. Cosman, and L. B. Milstein, "Subcarrier mapping based on slice visibility for video transmission over OFDM channels," invited paper, to appear in Proc. Asilomar Conference on Signals, Systems and Computers (Asilomar'12), Pacific Grove, CA, USA, November 2012.
[C-2] A. Vosoughi and P. C. Cosman, "Frame loss visibility modeling of stereoscopic video for H.264 AVC/MVC," to appear in Proc. IEEE International Conference on Image Processing (ICIP'12), Orlando, FL, USA, September 2012.
[C-3] M. Yang, Y. Yang, and P. C. Cosman, "Depth-assisted error concealment for intra frame slices in 3D video , to appear in Proc. IEEE International Conference on Image Processing (ICIP'12), Orlando, FL, USA, September 2012.
[C-4] Z. Lee, R. Khoshabeh, J. Juang, and T. Q. Nguyen, "Local stereo matching using motion cue and modified census in video disparity estimation," Proc. European Signal Processing Conference (EUSIPCO'12), Bucharest, Romania, August 2012.
[C-5] H. Ahlehagh and S. Dey, "Hierarchical video caching in wireless cloud: approaches and algorithms," Proc. IEEE International Conference on Communications Workshop on Realizing Advanced Video Optimized Wireless Networks (ICC ViOpt'12), Ottawa, Canada, June 2012.
[C-6] H. Ahlehagh and S. Dey, "Video Caching in Radio Access Network: Impact on Delay and Capacity Proc. IEEE Wireless Communications and Networking Conference (WCNC'12), Paris, France, April 2012.
[C-7] S. Dey, "Cloud Mobile Media: Opportunities, Challenges, and Directions," Proc. IEEE International Conference on Computing, Networking and Communications (ICNC'12), Maui, HW, USA, Januaray 2012.
[C-8] D. Wang, P. C. Cosman, and L. B. Milstein, "Cross layer resource allocation design for uplink video OFDMA wireless systems," Proc. IEEE Global Telecommunications Conference (GLOBECOM'11), Houston, TX, USA, December 2011.
[C-9] L. Toni, P. C. Cosman, and L. Milstein, "Unequal error protection based on slice visibility for transmission of compressed video over OFDM channels," Proc. IEEE International Conference on Multimedia and Expo (ICME'12), Workshop on Acoustics and Video Coding and Communication (AVCC), Barcelona, Spain, July 2011.