Video coding method and apparatus utilizing group of encoding units
The present invention relates to a block partitioning structure from among the video coding schemes, and a method and apparatus for encoding and decoding the block partitioning structure. The video encoding and decoding method comprises the steps of: combining two or more encoding units of maximum size into a single encoding unit group; acquiring encoding data corresponding to the combined single encoding unit group; and decoding, according to a decoding order, the two or more encoding units of maximum size contained in the single encoding unit group.
1. A video decoding method, comprising:
dividing a first coding block into two second coding blocks using a bi-partitioning, wherein the bi-partitioning refers to a division type of dividing a coding block in either a vertical direction or a horizontal direction, wherein the first coding block is a result from a quad-partitioning, and wherein the quad-partitioning refers to a division type of dividing a coding block in both a vertical direction and a horizontal direction;
dividing a second coding block resulting from the bi-partitioning into a plurality of partitions, wherein the partitions are determined by dividing the second coding block in one of the vertical direction or the horizontal direction, and wherein a number of the partitions belonging to the second coding block is two;
acquiring syntax information in a level of the second coding block; and
decoding the second coding block based on the syntax information,
wherein decoding the second coding block comprises:
generating a dequantized coefficient of the second coding block by performing a dequantization for the second coding block;
generating a residual signal of the second coding block by performing an inverse transform on the dequantized coefficient; and
generating a reconstructed signal of the second coding block based on the residual signal, and
wherein the inverse transform for the second coding block is performed in units of the second coding blocks, not in units of the partitions included in the second coding block.
2. The method of claim 1 , wherein decoding the second coding block comprises:
acquiring coding information commonly applied to the partitions in the second coding block using the syntax information;
decoding one of the partitions by using the coding information acquired in units of the second coding blocks; and
decoding the other one of the partitions by using the same coding information as the one of the partitions.
3. A video encoding method, comprising:
dividing a first coding block into two second coding blocks using a bi-partitioning, wherein the bi-partitioning refers to a division type of dividing a coding block in either a vertical direction or a horizontal direction, wherein the first coding block is a result from a quad-partitioning, and wherein the quad-partitioning refers to a division type of dividing a coding block in both a vertical direction and a horizontal direction;
dividing a second coding block resulting from the bi-partitioning into a plurality of partitions, wherein the partitions are determined by dividing the second coding block in one of the vertical direction or the horizontal direction, and wherein a number of the partitions belonging to the second coding block is two; and
generating a bitstream by encoding the second coding block,
wherein syntax information is encoded in a level of the second coding block,
wherein encoding the second coding block comprises:
performing a transform on a residual signal of the second coding block; and
performing a quantization on the transformed residual signal, and
wherein the transform for the second coding block is performed in units of the second coding blocks, not in units of the partitions included in the second coding block.
4. A device for storing a bitstream associated with a video signal,
wherein the bitstream includes syntax information,
wherein a first coding block is divided into two second coding blocks using a bi-partitioning, the bi-partitioning referring to a division type of dividing a coding block in either a vertical direction or a horizontal direction,
wherein the first coding block is a result from a quad-partitioning, the quad-partitioning referring to a division type of dividing a coding block in both a vertical direction and a horizontal direction,
wherein a second coding block resulting from the bi-partitioning is divided into a plurality of partitions, the partitions being determined by dividing the second coding block in one of the vertical direction or the horizontal direction, and a number of the partitions in the second coding block being two,
wherein the syntax information is encoded in in a level of the second coding block,
wherein the second coding block is encoded by performing a transform on a residual signal of the second coding block, and performing a quantization on the transformed residual signal, and
wherein the transform for the second coding block is performed in units of the second coding blocks, not in units of the partitions included in the second coding block.