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Re-quantization is a key technology for reducing the bit rate of compressed data. This reduction of the bit rate; and in certain cases may result in signal quality degradation. Therefore, the proposed techniques used 9/7 wavelet transform before optimal re-quantization and finally, the output stream of coding symbols is entropy coded by loss-less entropy coder; run-length encoding. Simulation results show that a better low Bit Rate has been obtained compared with other different techniques. The common aim of different compression techniques is to achieve high compression ratio.
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