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In this paper, we propose a new compression artifact removable method for MPEG-2 moving pictures. We utilize the Total Variation (TV) regularization method, and obtain a texture component in which blocky noise and mosquito noise are decomposed. These artifacts are removed by using selective filters controlled by the edge information from the structure component and the motion vectors. The experimental...
In Japanese mobile broadcasting, the H.264 compression standard is used. In spite of the high compression efficiency of H.264, the mobile broadcast channel is very narrow for sending high quality pictures. In the H.264 system, the deblocking filter is adopted in order to reduce blocky noise. However, when the channel is narrow, the deblocking filter degrades the picture sharpness enormously. In this...
Recently, the opportunity to treat images has increased. Most of the images are large, so they are usually compressed with JPEG and MPEG, which is a major compression standard. JPEG and MPEG use DCT (Discrete Cosine Transform) for transform. The DCT causes more and more blocky noise as the compression rate is set higher and higher. The images taken in the past are usually strongly compressed. We propose...
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