Unequal Error Protection for H.263+ bitstreams over a wireless IP network

This paper presents an original solution to efficiently transmit video bitstreams over an IP networked wireless channel via an unequal rate allocation protection scheme. The originality of this scheme is that it proposes a sensitivity estimation not only for the video stream itself as classically done, but also for the network headers used over the IP wireless network, here considered in their compressed version. Based on this sensitivity measure, the protection allocation algorithm is able to propose an efficient unequal rate allocation scheme using rate compatible punctured codes. Numerical results obtained in the case of H.263+ bitstreams transmitted over an error prone wireless compressed RTP/UDP/IP network show that taking into account both video and headers sensitivity allows this unequal error protection (UEP) scheme to provide PSNR improvements of about 5 dB when compared to equal error protection (EEP) scheme with a low additional complexity

[1]  K. Fazel,et al.  Application of unequal error protection codes on combined source-channel coding of images , 1990, IEEE International Conference on Communications, Including Supercomm Technical Sessions.

[2]  Thomas Stockhammer,et al.  Dependent source and channel rate allocation for video transmission , 2004, IEEE Transactions on Wireless Communications.

[3]  Faouzi Kossentini,et al.  H.263+: video coding at low bit rates , 1998, IEEE Trans. Circuits Syst. Video Technol..

[4]  John Cocke,et al.  Optimal decoding of linear codes for minimizing symbol error rate (Corresp.) , 1974, IEEE Trans. Inf. Theory.

[5]  Joachim Hagenauer,et al.  Rate-compatible punctured convolutional codes (RCPC codes) and their applications , 1988, IEEE Trans. Commun..

[6]  Antonio Navarro,et al.  Adaptive joint H.263-channel coding for memoryless binary channels , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[7]  Carsten Bormann,et al.  RObust Header Compression (ROHC): Framework and four profiles: RTP, UDP, ESP, and uncompressed , 2001, RFC.

[8]  Richard E. Ladner,et al.  Unequal loss protection: graceful degradation of image quality over packet erasure channels through forward error correction , 2000, IEEE Journal on Selected Areas in Communications.