FPGA Based Pipelined Architecture for SPIHT
In current centuries, the growth and demand for multimedia product growing very fast which lead to insufficient bandwidth of network and storage of memory device. Therefore, the need for compression becomes more to save the memory space and transmission bandwidth. The main objective of the paper is to compress the image while transferring it from one end to the other, storage etc. This paper focuses on a memory efficient FPGA implementation for SPIHT (Set Partitioning in Hierarchical Trees) image compression technique. While compressing the image the wavelet transform converts the image into its wavelet coefficients. The SPIHTencoder receives the coefficient value and convert it into the bit stream. Then the SPIHT decoding and inverse wavelet transform will be performed to reconstruct the original image. Because of Poor image quality reconstruction, we are enhancing DCT to Discrete wavelet transform and EBCOT Encoding to SPIHT Encoding. These techniques are implemented on 2-D images and we can validate such compression algorithm by calculating PSNR (peak signal to noise ratio), MSE (Mean square error) and CR(Compression ratio). A hardware realization is done in a Xilinx 8.1 device and it achieves savings of 20% in power consumption over full bit-planes coding scheme based on field-programmable gate arrays (FPGAs).
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