An electronic device includes a memory for storing a first neural network and a second neural network including a plurality of residual blocks and an upscaling block, and a processor for selecting a residual block from among the plurality of residual blocks for an input patch image of a first frame based on the second neural network and generating an output patch image of the first frame by upscaling the input patch image of the first frame to an image having a target resolution based on the selected residual block and the upscaling block.