Video Quality Evaluation for Wireless Transmission with Robust Header Compression P. Seeling and M. Reisslein and F.H.P. Fitzek and S. Hendrata Fourth.

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Presentation transcript:

Video Quality Evaluation for Wireless Transmission with Robust Header Compression P. Seeling and M. Reisslein and F.H.P. Fitzek and S. Hendrata Fourth International Conference on Information, Communications & Signal Processing Fourth IEEE Pacific-Rim Conference On Multimedia December 2003, Meritus Mandarin Hotel, Singapore

Center for TeleInFrastructure 2  Video services over wireless networks are gaining more and more interest  Services are needed that convince customers to buy new equipment (3GPP)  3GPP networks support video services such as the IMS and the MBMS entities  Problem: Video services need much more bandwidth than voice calls, which makes them hard to sell Video services

Center for TeleInFrastructure 3 Serving Sara (560x304 pixels)

Center for TeleInFrastructure 4 Motivation  Video services are transmitted over IP networks using the RTP/UDP/IP protocols  Video is encoded efficiently, but the protocol stack overhead is not  The protocol overhead comprises a large portion of the traffic (even more for small video formats as for the mobile phones)  Therefore: Compression of the protocol overhead needed

Center for TeleInFrastructure 5 Methodology  Uncorrelated bit errors as recently found for UMTS channels  Simulated with and without ROHC implementation  O-Mode

Center for TeleInFrastructure 6 ROHC Results

Center for TeleInFrastructure 7 Insights  Protocol header compression can be achieved by using ROHC  Higher compression ratios for smaller video formats and higher quantization  Lower fraction of packets comprised of actual video data (i.e., payload)  Lower error probability and state changes within ROHC

Center for TeleInFrastructure 8 ROHC Results

Center for TeleInFrastructure 9  ROHC is an efficient header compression scheme for multimedia in wireless environments  Compression achieved depends on video format and video content  Utilization of ROHC for multimedia streaming does not introduce additional losses in terms of perceived video quality (PSNR) Conclusion Video Measurements