METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL

• US 20190313129A1
• Filed: 11/08/2017
• Published: 10/10/2019
• Est. Priority Date: 11/08/2016
• Status: Active Grant

• Current Assignee: KT Corporation
• Original Assignee: KT Corporation
• Inventors: LEE, Bae Keun
• Granted Patent: US 10,904,581 B2
• Time in Patent Office: Days
• CPC Class Codes: H04N 19/119 Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
• CPC Class Codes: H04N 19/124 Quantisation
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/174 the region being a slice, e.g. a line of blocks or a group of blocks
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/96 Tree coding, e.g. quad-tree coding

Abstract

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.

Claims

1. A method for decoding a video, the method comprising:

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,

wherein at least one of the vertical line and the horizontal line divides the current block asymmetrically.

2. The method of claim 1, wherein the method comprises:

decoding a first indicator indicating whether at least one of the vertical line or the horizontal line is used for asymmetric partitioning; and

decoding a second indicator to specify a location of the vertical line or the horizontal line when the first indicator indicates that the vertical line or the horizontal line is used for the asymmetric partitioning.

3. The method of claim 1, wherein the current block is divided into four partitions by two horizontal lines and one vertical line which dividing one of three blocks divided by the two horizontal lines, or by two vertical lines and one horizontal line which dividing one of three blocks divided by the two vertical lines.

4. The method of claim 1, wherein the method comprises:

determining whether to divide the current block with binary tree partitioning when it is determined that the current block is not divided with the quad tree partitioning; and

dividing the current block into two partitions when it is determined that the current block is divided with the binary tree partitioning.

5. The method of claim 4, wherein the method further comprises determining whether polygon binary tree partitioning is applied to the current block, and

wherein when the polygon binary tree partitioning is applied to the current block, the current block is divided into a rectangular shaped partition and a polygonal shaped partition.

6. The method of claim 5, wherein the polygonal shaped partition is divided into sub-partitions of rectangular shapes and prediction on the polygonal shaped partition is performed for each sub-partition.

7. The method of claim 4, wherein the current block is divided by a vertical line or a horizontal line dividing the current block into two partitions, and the vertical line or the horizontal line divides the current block asymmetrically.

8. A method for encoding a video, the method comprising:

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,

wherein at least one of the vertical line and the horizontal line divides the current block asymmetrically.

9. The method of claim 8, wherein the method comprises:

encoding a first indicator indicating whether at least one of the vertical line or the horizontal line is used for asymmetric partitioning; and

encoding a second indicator to specify a location of the vertical line or the horizontal line when the first indicator indicates that the vertical line or the horizontal line is used for the asymmetric partitioning.

10. The method of claim 8, wherein the current block is divided into four partitions by two horizontal lines and one vertical line which dividing one of three blocks divided by the two horizontal lines, or by two vertical lines and one horizontal line which dividing one of three blocks divided by the two vertical lines.

11. The method of claim 8, wherein the method comprises:

determining whether to divide the current block with binary tree partitioning when it is determined that the current block is not divided with the quad tree partitioning; and

dividing the current block into two partitions when it is determined that the current block is divided with the binary tree partitioning.

12. The method of claim 11, wherein the method further comprises determining whether polygon binary tree partitioning is applied to the current block, and

wherein when the polygon binary tree partitioning is applied to the current block, the current block is divided into a rectangular shaped partition and a polygonal shaped partition.

13. The method of claim 12, wherein the polygonal shaped partition is divided into sub-partitions of rectangular shapes and prediction on the polygonal shaped partition is performed for each sub-partition.

14. The method of claim 11, wherein the current block is divided by a vertical line or a horizontal line dividing the current block into two partitions, and the vertical line or the horizontal line divides the current block asymmetrically.

15. An apparatus for decoding a video, the apparatus comprising:

a picture partitioning unit to determine whether to divide a current block with quad tree partitioning, and to divide 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,

wherein at least one of the vertical line and the horizontal line divides the current block asymmetrically.