Method and apparatus for processing video signal
A method for decoding a video according to the present invention may comprise: determining whether to divide a current block with quad tree partitioning, and dividing the current block into four partitions based on a vertical line and a horizontal line when it is determined that the current block is divided with the quad tree partitioning.
1. A method for decoding a video, the method comprising:
determining whether it is allowed to divide a current block into two partitions or not;
when it is determined that a division of the current block is allowed, determining whether to divide the current block into two partitions or not;
when it is determined that the current block is to be divided, decoding a first indicator of 1-bit indicating whether the current block is partitioned in a symmetric form or in an asymmetric form; and
dividing the current block in a vertical direction or in a horizontal direction so as to generate two partitions,
wherein when the first indicator indicates that the current block is partitioned in the asymmetric form, the current block is partitioned into a first partition having ¼ size of the current block and a second partition having ¾ size of the current block, and
wherein locations of the first partition and the second partition are determined based on a second indicator of 1-bit decoded from a bitstream.
2. The method of claim 1 , wherein when the current block is divided in the horizontal direction, it is determined based on the second indicator which of the first partition and the second partition is located upper side of the current block, and
when the current block is divided in the vertical direction, it is determined based on the second indicator which of the first partition and the second partition is located left side of the current block.
3. The method of claim 1 , wherein it is determined based on a size of the current block whether both of the symmetric form and the asymmetric form are applicable to the current block or only the symmetric form is applicable to the current block.
4. A method for encoding a video, the method comprising:
determining whether it is allowed to divide a current block into two partitions or not;
when it determined that a division of the current block is allowed, determining whether to divide the current block into two partitions or not;
when it is determined to divide the current block, determining whether the current block is partitioned in a symmetric form or in an asymmetric form, a first indicator of 1-bit indicating whether the current block is partitioned in the symmetric form or in the asymmetric form being encoded in a bitstream;
dividing the current block in a vertical direction or in horizontal direction so as to generate two partitions,
wherein when it is determined to divide the current block in the asymmetric form, the current block is partitioned into a first partition having a ¼ size of the current block and a second partition having ¾ size of the current block, and
wherein a second indicator of 1-bit which is used to determine locations of the first partition and the second partition is encoded in the bitstream.
5. The method of claim 4 , wherein when the current block is divided in the horizontal direction, the second indicator is used to determine which of the first partition and the second partition is located upper side of the current block, and
when the current block is divided in the vertical direction, the second indicator is used to determine which of the first partition and the second partition is located left side of the current block.
6. The method of claim 4 , wherein it is determined based on a size of the current block whether both of the symmetric form and the asymmetric form are applicable to the current block or only the symmetric form is applicable to the current block.
7. A non-transitory computer-readable medium for storing data associated with a video signal, comprising:
a data stream stored in the non-transitory computer-readable medium, the data stream being encoded by an encoding method which comprising:
determining whether it is allowed to divide a current block into two partitions or not;
when it determined that a division of the current block is allowed, determining whether to divide the current block into two partitions or not;
when it is determined to divide the current block, determining whether the current block is partitioned in a symmetric form or in an asymmetric form, a first indicator of 1-bit indicating whether the current block is partitioned in the symmetric form or in the asymmetric form being encoded in a bitstream;
dividing the current block in a vertical direction or in a horizontal direction so as to generate two partitions,
wherein when it is determined to divide the current block in the asymmetric form, the current block is partitioned into a first partition having a ¼ size of the current block and a second partition having ¾ size of the current block, and
wherein a second indicator of 1-bit which is used to determine locations of the first partition and the second partition is encoded in the bitstream.