Decoding apparatus and operating method of the same, and artificial intelligence (AI) up-scaling apparatus and operating method of the same

An electronic device comprising:

• a communication interface configured to receive artificial intelligence (AI) encoding data, the AI encoding data generated by an AI down-scaling of an original image followed by an encoding;
• one or more processors configured to:
• obtain image data corresponding to an encoding result on a first image from the received AI encoding data;
• obtain AI data related to AI down-scaling the original image to the first image from the received AI encoding data, the AI data comprising an index indicating first neural network (NN) setting information for the AI down-scaling;
• and
• obtain a second image by decoding the obtained image data;
• and
• an input/output (I/O) interface,
• wherein the one or more processors are further configured to:
• control the I/O interface to receive supplementary information from an external apparatus,
• determine, based on the supplementary information, whether an AI up-scaling is possible by the external apparatus,
• when the AI up-scaling is impossible, control the I/O interface to transmit the second image to the external apparatus, and
• when the AI up-scaling is possible, control the I/O interface to transmit the second image and the AI data to the external apparatus,
• wherein the index is used to select second NN setting information from among a plurality of second NN setting information for an up-scaling NN, wherein the external apparatus includes the up-scaling NN, and
• wherein the first image is obtained through a down-scaling NN configured with selected first NN setting information from among a plurality of first NN setting information for the AI down-scaling.