In video transmission, the videos are encoded and decoded. At that time, bit control is performed by specifying the quantization parameter (QP). The video undergoes various processing to remove redundancy and then orthogonally transforms the video signal into the frequency domain. The frequency domain coefficients are then quantized and transmitted. At that time, by specifying QP, the quantization step is changed, and the amount of data can be changed. In an opinion, a codec using super-resolution is proposed. At the CNN based super-resolution of encoded images, the degradation of the input image due to encoding depends on the characteristics of the image. As a result, there is a problem that the weights of the optimal CNN for the input image changes depending on the image characteristics. In order to solve this problem, we propose a method to adaptively perform super-resolution corresponding to image degradation.