Patent ID: 8917763
Filing Date: 2014-12-23
Classification: H04N

Abstract:
1. A video decoding apparatus for decoding a coded stream to generate decoded video, the video decoding apparatus comprising: a frame memory for storing a reference image; a motion compensation unit configured to perform motion compensation on a current block to be decoded, using the reference image stored in the frame memory, the current block being included in video and having a non-rectangular shape; and a decoding unit configured to generate the decoded video from the coded stream, wherein the motion compensation unit includes: a reference block memory for storing part of the reference image; a frame-memory-transfer control unit configured to identify a pixel block in the reference image and transfer pixel data of the identified pixel block from the frame memory to the reference block memory, the pixel block having a rectangular shape and including a reference block that has a non-rectangular shape and is used for the motion compensation on the current block; and a motion compensation processing unit configured to generate a prediction block of the current block, using the reference block included in the pixel block stored in the reference block memory, the decoding unit is configured to block partition information and a motion vector from the coded stream and generate the decoded video from the coded stream, using the coded stream and the prediction block generated by the motion compensation unit, the block partition information indicating a shape of the reference image, and the frame-memory-transfer control unit is configured to identify the pixel block, using the block partition information and the motion vector which are obtained by the decoding unit, the pixel block having the rectangular shape and including the reference block having the non-rectangular shape.