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 four second coding blocks based on a quad-partitioning, the quad-partitioning being representative of a division type of dividing a coding block in both a vertical direction and a horizontal direction;
dividing a second coding block into two third coding blocks based on a bi-partitioning, the bi-partitioning being representative of a division type of dividing a coding block in one of the vertical direction or the horizontal direction;
acquiring syntax information in a level of a third coding block; and
decoding the third coding block based on the syntax information,
wherein the third coding block is divided into a plurality of partitions,
wherein the plurality of partitions is determined by dividing the third coding block in one of the vertical direction or the horizontal direction,
wherein decoding the third coding block comprises:
generating dequantized coefficients of the third coding block by performing dequantization for the third coding block; and
generating a residual signal of the third coding block by performing inverse transform on the dequantized coefficients, and
wherein the inverse transform for the third coding block is performed in units of the third coding blocks, not in units of the partitions included in the third coding block.
2. The video decoding method of claim 1 , wherein decoding the third coding block comprises:
acquiring coding information commonly applied to the partitions in the third coding block based on the syntax information;
decoding one of the partitions based on the coding information; and
decoding the other one of the partitions based on the same coding information as the one of the partitions.
3. The video decoding method of claim 2 , wherein the coding information is acquired in units of the third coding blocks.
4. A video encoding method, comprising:
dividing a first coding block into four second coding blocks based on a quad-partitioning, 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 into two third coding blocks based on a bi-partitioning, wherein the bi-partitioning refers to a division type of dividing a coding block in one of the vertical direction or the horizontal direction; and
generating a bitstream by encoding a third coding block,
wherein syntax information is encoded into the bitstream in a level of the third coding block,
wherein the third coding block is divided into a plurality of partitions
wherein the plurality of partitions is determined by dividing the third coding block in one of the vertical direction or the horizontal direction,
wherein encoding the third coding block comprises:
performing transform on a residual signal of the third coding block; and
performing quantization on the transformed residual signal, and
wherein the transform for the third coding block is performed in units of the third coding blocks, not in units of the partitions included in the third coding block.
5. The video encoding method of claim 4 , wherein coding information is encoded into the bitstream based on the syntax information, and
wherein the coding information is commonly applied to the partitions in the third coding block.
6. The video encoding method of claim 5 , wherein the coding information is encoded in units of the third coding blocks.
7. A transmission method of a video signal, comprising:
dividing a first coding block into four second coding blocks based on a quad-partitioning, 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 into two third coding blocks based on a bi-partitioning, wherein the bi-partitioning refers to a division type of dividing a coding block in one of the vertical direction or the horizontal direction;
encoding a third coding block to generate a bitstream; and
transmitting the bitstream including the video signal,
wherein syntax information is encoded into the bitstream in a level of the third coding block,
wherein the third coding block is divided into a plurality of partitions,
wherein the plurality of partitions is determined by dividing the third coding block in one of the vertical direction or the horizontal direction,
wherein encoding the third coding block comprises:
performing transform on a residual signal of the third coding block; and
performing quantization on the transformed residual signal, and
wherein the transform for the third coding block is performed in units of the third coding blocks, not in units of the partitions included in the third coding block.
8. The transmission method of claim 7 , wherein coding information is encoded into the bitstream based on the syntax information, and
wherein the coding information is commonly applied to the partitions in the third coding block.
9. The transmission method of claim 8 , wherein the coding information is encoded in units of the third coding blocks.