DEVICE AND METHOD FOR REDUCING NOISE

摘要

PROBLEM TO BE SOLVED: To improve the prediction accuracy and to enhance the noise reduction performance at application of a classification adaptive prediction processing to a digital information signal that is subjected to coding decoding processing. SOLUTION: A decoder 1 outputs a decoded image signal and decoding-use attached information. The attached information means signal type information, image format information, image quality information, and a motion vector or the like. A class based on the attached information is created. An area segmentation section 4 extracts pixel data of a class tap to extract a feature quantity. A class code is generated on the basis of the attached information class and the feature quantity. A prediction coefficient ROM 8 outputs a prediction coefficient set corresponding to the received class code to a prediction arithmetic section 9. The prediction coefficient is decided in advance by learning and stored. Using the pixel data of the prediction tap extracted by a prediction tap data generating section 5 and the prediction coefficient set received from the ROM 8 to apply a prediction arithmetic operation to an output image signal of the decoder 1 can generate a signal whose noise is reduced.