Apparatuses and methods for performing artificial intelligence encoding and artificial intelligence decoding on image

An electronic device for displaying an image by using an artificial intelligence (AI), the electronic device comprising:

• a display;
• and
• one or more processors configured to execute one or more instructions stored in the electronic device, to:
• receive image data generated through an encoding on a first image;
• decode the image data to obtain a second image corresponding to the first image;
• based on AI data being received from a server, the AI data being related to AI down-scaling of an original image to the first image through a down-scaling neural network (NN) that operates according to first NN setting information, the first NN setting information being selected from a plurality of first NN setting information:
• select second NN setting information that is paired with the selected first NN setting information through joint training of the down-scaling NN and an up-scaling NN, based on the AI data, from a plurality of second NN setting information that have one-to-one correspondence with the plurality of first NN setting information through the joint training;
• obtain a third image corresponding to the original image by performing AI up-scaling on the obtained second image through the up-scaling NN that operates according to the selected second NN setting information;
• and
• provide, on the display of the electronic device, the obtained third image;
• and
• based on the AI data not being received:
• output the obtained second image.

A server for providing an image using an artificial intelligence (AI), the server comprising:

• one or more processors configured to execute one or more instructions stored in the server, to:
• determine whether to perform AI down-scaling on an original image;
• based on the AI down-scaling on the original image being determined to be performed,
• select first neural network (NN) setting information from a plurality of first NN setting information;
• obtain, by a down-scaling NN, a first image by performing the AI down-scaling on the original image, the down-scaling NN operating according to the selected first NN setting information;
• obtain image data by encoding the obtained first image;
• and
• transmit, to an electronic device, the image data and AI data related to the AI down-scaling, the AI data being used to select second NN setting information paired with the selected first NN setting information through joint training of the down-scaling NN and an up-scaling NN, from a plurality of second NN setting information for AI up-scaling that have one-to-one correspondence with the plurality of first NN setting information through the joint training,
• wherein the AI up-scaling is performed by the up-scaling NN that operates according to the selected second NN setting information.