1results about How to "Improve video quality" patented technology

Methods for deriving an intra prediction mode based on an inter prediction signal are disclosed. In the present embodiments, an image decoding device determines a motion vector for a current block from a motion vector candidate list for the current block and generates an inter prediction signal for the current block based on a reference block indicated by the motion vector for the current block. The image decoding device derives an intra prediction mode for the current block based on the reference block and a template for the reference block and generates an intra prediction signal for the current block based on the intra prediction mode. The image decoding device generates a final prediction signal for the current block based on the inter prediction signal and the intra prediction signal.