| 摘要 |
PURPOSE:To improve the picture quality of a decoded image by suppressing deterioration such as the ringing of the edge part of the decoded image proper to an encoding system using orthogonal transformation, etc. CONSTITUTION:Variable length encode data 1 is decoded at a decoder part 2, and it goes to n<2> transformation coefficients 3 per block. The transform coefficients 3 are inputted to a reverse transform part 4, and go to the decoded images 5. Meanwhile, the characteristic of the images are judged at an image characteristic judging part 6 based on the transform coefficients from the decoder part 2. Post-processing is performed on the decoded image 5 at a post- processing part 7 based on judgement for the image characteristic, then, it goes to the decoded image 8 with improved picture quality. |
