Unbalanced quantized multiple description video transmission using path diversity

Sila Ekmekci; Thomas Sikora

doi:10.1117/12.476699

7 May 2003 Unbalanced quantized multiple description video transmission using path diversity

Sila Ekmekci, Thomas Sikora

Proceedings Volume 5022, Image and Video Communications and Processing 2003; (2003) https://doi.org/10.1117/12.476699
Event: Electronic Imaging 2003, 2003, Santa Clara, CA, United States

Abstract

Multiple Description Coding is a forward error correction scheme where two or more descriptions of the source are sent to the receiver over different channels. If only one channel is received the signal can be reconstructed with distortion D₁ or D₂. On the other hand, if both channels rae received the combined information is used to achieve a lower distortion D₀. Our approach is based on the Multiple State Video Coding with the novelty that we achieve a flexible unbalance rate of the two streams by varying the quantization step size while keeping the original frame rate constant. The total bitrate Rτ is fixed which is to be allocated between the two streams. If the assigned bitratres are not balanced there will be PSNR variations between neighboring frames after reconstruction. Our goal is to find the optimal rate allocation while maximizing the average reconstructed frame PSNR and minimizing the PSNR variations given the total bitrate Rτ and the packet loss probabilities p₁ and p₂ over the two paths. The reconstruction algorithm is also taken into account in the optimization process. The paper will report results presenting optimal system designs for balanced but also for unbalanced path conditions.

Citation Download Citation

Sila Ekmekci and Thomas Sikora "Unbalanced quantized multiple description video transmission using path diversity", Proc. SPIE 5022, Image and Video Communications and Processing 2003, (7 May 2003); https://doi.org/10.1117/12.476699

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