AI ENCODING APPARATUS AND OPERATING METHOD THEREOF, AND AI DECODING APPARATUS AND OPERATING METHOD THEREOF

摘要

The present invention relates to an image decoding apparatus. The image decoding apparatus includes: a memory storing at least one instruction; and a processor executing the instruction stored in the memory. The processor obtains image data corresponding to a first image made as an AI encoding apparatus AI-downscales an original image by using a first DNN; restores a second image corresponding to the first image based on the image data; and obtains a third image made as the apparatus AI-upscales the second image by calculating second parameters of a filter kernel included in a second DNN and the second image through the second DNN corresponding to the first DNN. Each of the second parameters is expressed by the multiplication of a scale factor a2 and one of k integer values, each of the k integer values is 0 or 2n (n is an integer), and the second parameters are determined as values associated with first parameters of the filter kernel included in the first DNN.;COPYRIGHT KIPO 2020