Performance analysis of unequal error protection codes for image transmission

The performance analysis of unequal error protection codes for image transmission over noisy channels and AWGN channels is considered in this paper. The International Standards Organization (ISO) has proposed the JPEG standard for still image compression. JPEG standard not only provides the basic feature of compression as baseline algorithm but also provides the framework for reconstructing images in different picture qualities and sizes. These features are referred to as SNR and spatial scalability, respectively. The ability of calculation of the bit sensitivity of the compressed image data enables one to perform a highly efficient unequal error protection for image transmission over noisy channels. A channel code is proposed to protect progressively compressed and packetized image data that is transmitted across noisy channels. A group of unequal error protection codes using Trellis Coded Modulation (TCM) for the JPEG compressed images is considered. Computer simulated results of two levels of UEP with TCM and four levels of UEP with TCM are presented.