# US 2014/0153650 A1 · Video encoding method and apparatus and video decoding method and apparatus, based on hierarchical coded block pattern information

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- Number: US 2014/0153650 A1
- Document ID: US20140153650A1
- Status: Published application
- Kind: A1
- Application number: 14/177,286
- Filed: 2014-02-11
- Published: 2014-06-05
- Earliest claimed: 2010-08-13
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Min-su CHEON; Hae-kyung JUNG; Jung-hye MIN; Il-koo KIM
- Web page: https://patentgrep.com/patent/US20140153650A1

## CPC

- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
- H04N 19/122: Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
- H04N 19/136: Incoming video signal characteristics or properties
- H04N 19/147: according to rate distortion criteria (rate-distortion as a criterion for motion estimation H04N19/567)
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/184: the unit being bits, e.g. of the compressed video stream
- H04N 19/60: using transform coding
- H04N 19/61: in combination with predictive coding
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 19/96: Tree coding, e.g. quad-tree coding
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A method and apparatus for decoding video and a method and apparatus for encoding video are provided. The method for decoding video includes: receiving and parsing a bitstream of encoded video; extracting, from the bitstream, encoded image data of a current picture assigned to a maximum coding unit of the current picture, information regarding a coded depth of the maximum coding unit, information regarding an encoding mode, and coding unit pattern information indicating whether texture information of the maximum coding units has been encoded; and decoding the encoded image data for the maximum coding unit, based on the information regarding the coded depth of the maximum coding unit, the information regarding the encoding mode, and the coding unit pattern information.

## Claims

### Claim 1

An apparatus for decoding video, the apparatus comprising:
a receiver which receives a bitstream of encoded video;
an obtainer which obtains, from the bitstream, encoded image data of a chroma component of a transformation unit included in a maximum coding unit of the current picture, information regarding a coded depth of the maximum coding unit, and hierarchical coding unit pattern information for at least one transformation depth, and determines, based on a first hierarchical coding unit pattern information regarding a chroma component of the transformation unit of a first transformation depth, whether second hierarchical coding unit pattern information regarding chroma components of four transformation units of a second transformation depth split from the transformation unit of the first transformation depth has been encoded; and
a decoder which decodes the encoded image data of the chroma component of the transformation unit, based on the obtained information regarding the coded depth of the maximum coding unit and the hierarchical coding unit pattern information,
wherein the maximum coding unit comprises the transformation unit for performing transformation on the maximum coding unit, the transformation unit is hierarchically split according to the at least one transformation depth, and the second transformation depth is lower than the first transformation depth.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein, when the first hierarchical coding unit pattern information indicates that the second hierarchical coding unit pattern information regarding the second transformation depth is present, the obtainer further obtains the second hierarchical coding unit pattern information regarding the second transformation depth from the bitstream.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein, when the first hierarchical coding unit pattern information indicates that the second hierarchical coding unit pattern information regarding the second transformation depth is not present, the decoder decodes the chroma component of the transformation unit of the first transformation depth.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein the decoder decodes the transformation unit of the first transformation depth based on coding unit pattern information indicating whether texture information of the chroma component of the transformation unit has been encoded.