# US 2014/0153641 A1 · Apparatus for decoding motion information in merge mode

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- Number: US 2014/0153641 A1
- Document ID: US20140153641A1
- Status: Published application
- Kind: A1
- Application number: 14/090,195
- Filed: 2013-11-26
- Published: 2014-06-05
- Earliest claimed: 2011-08-29
- Assignees: Ibex Pt Holdings Co., Ltd.
- Applicants: Ibex Pt Holdings Co., Ltd.
- Inventors: Kwangje KIM; Hyunoh OH
- Web page: https://patentgrep.com/patent/US20140153641A1

## CPC

- H04N 19/52: by predictive encoding
- H04N 19/124: Quantisation
- H04N 19/126: Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
- H04N 19/129: Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
- H04N 19/13: Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
- H04N 19/139: Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
- H04N 19/157: Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- 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 19/1887: {the unit being a variable length codeword}
- H04N 19/198: {including smoothing of a sequence of encoding parameters, e.g. by averaging, by choice of the maximum, minimum or median value}
- H04N 19/51: Motion estimation or motion compensation
- H04N 19/513: Processing of motion vectors
- H04N 19/593: involving spatial prediction techniques
- H04N 19/61: in combination with predictive coding
- H04N 19/40: using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Disclosed is an apparatus for decoding motion information in merge mode for reconstructing a moving picture signal coded at a low data rate while maintaining a high quality of an image. The apparatus for decoding motion information in merge mode discloses the position of a merge mode candidate and the configuration of a candidate in order to predict motion information in merge mode efficiently. Furthermore, a merge candidate indicated by the merge index of a current block can be efficiently reconstructed irrespective of a network environment by adaptively generating a merge candidate based on the number of valid merge candidate.

## Claims

### Claim 1

An apparatus for decoding motion information in merge mode, comprising:
a merge mode motion information decoding unit configured to decode motion information using available spatial and temporal merge candidates when a motion information encoding mode of a current block indicates a merge mode;
a prediction block generation unit configured to generate a prediction block of the current block using the decoded motion information; and
a residual block decoding unit configured to generate a quantization block by inversely scanning residual signals, inversely quantize the quantization block using a quantization parameter, and generate a residual block by inversely transforming the inverse-quantized block,
wherein when the current block is not adjacent to a lower boundary of a largest coding unit, a motion vector of a first merge candidate block is determined as a motion vector of the temporal merge candidate if the motion vector of the first merge candidate block is available and a motion vector of a second merge candidate block is determined as the motion vector of the temporal merge candidate if the motion vector of the first merge candidate block is unavailable.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein when the current block is adjacent to a lower boundary of the largest coding unit, the motion vector of the second merge candidate block is selected as the motion vector of the temporal merge candidate.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein a reference picture index of the temporal merge candidate is set as a reference picture index of one of neighboring block or 0.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the first and second merge candidate blocks are included in a temporal merge candidate picture and the temporal merge candidate picture is determined differently based on a slice type.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein if the number of the available spatial and temporal merge candidates is smaller than a predetermined number, one or more merge candidates are generated.