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 15-18 December 2003, Meritus Mandarin Hotel, Singapore

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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

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Serving Sara (560x304 pixels)

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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

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Methodology

Uncorrelated bit errors as recently found for UMTS channels

Simulated with and without ROHC implementation

O-Mode

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ROHC Results

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Insights

Protocol header compression can be achieved by using ROHC

Higher compression ratios for smaller video formats and higher quantizationLower fraction of packets comprised of actual

video data (i.e., payload)Lower error probability and state changes within

ROHC

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ROHC Results

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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