VIDEO ENCODING/DECODING METHOD, VIDEO ENCODING/DECODING DEVICE, AND PROGRAMS THEREFOR

摘要

To reduce the amount of computation by a de-noise filter, while continuing to suppress reduction in encoding efficiency. In a video encoding/decoding device that encodes or decodes video using a loop filter, a deviation calculation unit calculates the degree of deviation between a target pixel for de-noising and a pixel in the vicinity of the target pixel, using a decoded image. A template shape setting unit limits the template shape such that the lower the degree of deviation compared to a maximum deviation value inside the decoded image, the smaller the template shape. The loop filter performs template matching on the basis of the limited template shape and removes the noise in the target pixel, when removing the noise in the target pixel using the weighted sum of the weight corresponding to the degree of template similarity between the template for the target pixel and the templates for each search point within the search shape and a pixel value in the relevant search point.