Less Complex and Memory Efficient Multiple Descriptive Coding for Image Transmission over Wireless Sensor Networks

In this paper a new design approach for embedded block coder for image is proposed. The proposed method is based on the set portioning embedded block coder (SPECK) algorithm, which is highly flexible and its compression efficiency quite competitive with other coders. In this method MDC algorithm based on SPECK having memory efficient and less complex are presented, suitable for real-time applications of image communication over wireless channels. Multiple Description Coding (MDC) is one of the promising solutions for the image delivery over lossy networks. In the MDC the reconstructed quality of image will be improved as long as more descriptions are received, since in this method the lost description can be estimated at receiver In the original SPECK coder algorithm large dynamic memory is required (i.e. for link lists), which is not suitable for memory constrained portable devices. The proposed algorithm does not require any dynamic memory, which also reduces access time and complexity of coding/decoding.