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MPEG4 is a method of defining compression of audio and video digital data. MPEG4 videos double compression method is used to decompress video from spatial domain to the frequency domain and then resaved with a different quantization matrix. Markov feature is a second order statistics which was adopted to detect double compression artifacts in the original video. In proposed system, double compression artifacts in H.264/AVC was detected by Markov statistics and by comparing two videos the ratios such as peak signal to noise ratio (PSNR), mean squared error (MSE) and structural similarity index (SSIM) are calculated.
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