Per the name (Deep Learning Super Sampling), DLSS uses a trained neural network to achieve high-quality upsampling. The neural network is trained on representat

Per the name (Deep Learning Super Sampling), DLSS uses a trained neural network to achieve high-quality upsampling. The neural network is trained on representative output of the game at the internal framebuffer resolution and at the target output resolution (with SSAA and such). The upsampling algorithm in the OP is not based on machine learning but is also fairly domain specific and of limited general applicability.