Analysis of Arithmetic and Huffman Compression Techniques by Using DWT-DCT
Block IT Assistant, Government of Bihar, India, Gaurav Kumar, Rajeev Kumar · International Journal of Image Graphics and Signal Processing · 2021
In the recent era, digital contents are exchanging over the internet and it has increased exponentially.Sometimes, we need small sizes to share the real world, because of narrow bandwidth.Hence, the data compression concept came in limelight to utilize the storage capacity and available bandwidth efficiently.This paper presents an analysis of Arithmetic and Huffman compression techniques based on a hybrid combination of the DWT-DCT techniques.The input image is decomposed up to the 3 rd level by using the DWT and then Arithmetic & Huffman coding is applied separately on quantized sub-bands on 2 nd as well as 3 rd level coefficients from approximation subbands to get a high compression ratio and high peak signal-to-noise ratio values.On the third level approximation subband, the DCT method is applied to reduce the blocking effect.Simulation results show that the Arithmetic coding exhibits higher CR than Huffman coding, but smaller PSNR values.