# US 2013/0156335 A1 · Method for encoding and decoding video, and apparatus using same

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- Number: US 2013/0156335 A1
- Document ID: US20130156335A1
- Status: Published application
- Kind: A1
- Application number: 13/819,385
- Filed: 2011-09-02
- Published: 2013-06-20
- Earliest claimed: 2010-09-02
- Assignees: LG Electronics Inc.
- Inventors: Jaehyun Lim; Jungsun Kim; Seungwook Park; Jaewon Sung; Byeongmoon Jeon; Joonyoung Park; Yongjoon Jeon; Younghee Choi
- Web page: https://patentgrep.com/patent/US20130156335A1

## CPC

- H04N 19/52: by predictive encoding
- G06T 9/004: {Predictors, e.g. intraframe, interframe coding}
- H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/182: the unit being a pixel
- H04N 19/31: in the temporal domain
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to use the same candidates. The method for decoding video data proposed by the present invention comprises receiving mode information on an inter-prediction method of a current block, determining, on the basis of the received mode information, whether the inter-prediction method to be applied to the current block is an AMVP mode or a merge mode, and selecting a candidate to derive motion information of the current block.

## Claims

### Claim 1

A method of encoding image information, the method comprising:
determining a prediction mode of a current block; and
when the determined prediction mode is a skip mode, transmitting information that specifies one prediction direction among a forward direction, a backward direction, or a bi-direction.

### Claim 2

A method of decoding image information, the method comprising:
determining a prediction mode of a current block; and
when the prediction mode of the current block is a skip mode, according to information that indicates a prediction direction, setting the prediction direction of the skip mode as a uni-direction or a bi-direction.

### Claim 3

A method of encoding image information, the method comprising:
checking costs for using each candidate with respect to AMVP candidates;
comparing the sameness between a merge candidates and the AMVP candidates;
checking costs for a merge candidate which is different from the AMVP candidate; and
based on the checked costs, determining an inter prediction mode that is to be applied to a current block.

### Claim 4

A method of decoding image information, the method comprising:
selecting AMVP candidates from neighboring area of a current block;
determining the sameness between the AMVP candidates and merge candidates; and
based on the sameness determination result, merging the current block into a merge candidate which is different from the AMVP candidates.

### Claim 5

A method of encoding image information, the method comprising:
selecting AMVP candidates from neighboring area of a current block and configuring an AMVP candidate list;
determining whether there is a merge candidate not included in the AMVP candidate list; and
when there is a merge candidate not included in the AMVP candidate list, performing a signaling operation to add the merge candidate to the AMVP candidate list or change a predetermined candidate among the candidates of the AMVP candidate list into the merge candidate.

### Claim 6

A method of decoding image information, the method comprising:
selecting AMVP candidates from neighboring area of a current block and configuring an AMVP candidate list;
if there is a merge candidate not included in the AMVP candidate list, adding the merge candidate to the AMVP candidate list or changing a predetermined candidate among the candidates of the AMVP candidate list into the merge candidate; and
predicting with respect to a current block on the basis of the changed AMVMP candidate list.

### Claim 7

A method of encoding image information, the method comprising:
determining a prediction method applied to a current block among an inter prediction method using an AMVP and an inter prediction method using a merge mode; and
transmitting information on the determined prediction method,
wherein candidates of the AMVP and candidates of the merge mode are integrated and used.

### Claim 8

A method of decoding image information, the method comprising:
receiving mode information on an inter prediction method of a current block; and
selecting candidates for deriving motion information on the current block,
wherein the candidates are selected from the left area, top area, and corner area of the current block and a co-located block with respect to the current block.

### Claim 9 (depends on 8)

The method of claim 8, wherein the candidates, as blocks specifically positioned in the left area, top area, and corner area of the current block, are blocks of an inter prediction mode.

### Claim 10 (depends on 8)

The method of claim 8, wherein the candidates are the bottom block at the left area of the current block, the rightmost block at the top area of the current block, and the left below corner block, left top corner block, and right top corner block with respect to the current block.