Unequally protected packet transmission of SPIHT-compressed images

Kuen-Tsair Lay; Chia-Yi Chou; Lee-Jyi Wang

doi:10.1117/12.917572

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15 November 2011 Unequally protected packet transmission of SPIHT-compressed images

Kuen-Tsair Lay, Chia-Yi Chou, Lee-Jyi Wang

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Proceedings Volume 8335, 2012 International Workshop on Image Processing and Optical Engineering; 833515 (2011) https://doi.org/10.1117/12.917572
Event: 2012 International Workshop on Image Processing and Optical Engineering, 2012, Harbin, China

Abstract

In combination with the discrete wavelet transform (DWT), set partitioning in hierarchical trees (SPIHT) is one of the most renowned techniques for image compression. One problem with SPIHT, however, is that its decoding can be extremely sensitive to errors in its embedded bit stream. In this paper, we address the issue of transmitting SPIHTencoded images in packets via erasure channels, wherein each received packet is either error-free or totally discarded. In our scheme, the original SPIHT code sequence is packetized (into two types: critical packet (CP) and refinement packet (RP)). Those packets are then allocated with different diversity orders for unequal error protection (UEP) so that the decoded image is expected to attain the highest signal-to-noise ratio (SNR) at the receiver. Simulations show that the proposed scheme significantly improves the decoded images as compared to the case of no diversity allocation and the case of not distinguishing between CP and RP.

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Kuen-Tsair Lay, Chia-Yi Chou, and Lee-Jyi Wang "Unequally protected packet transmission of SPIHT-compressed images", Proc. SPIE 8335, 2012 International Workshop on Image Processing and Optical Engineering, 833515 (15 November 2011); https://doi.org/10.1117/12.917572

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