US 9,544,595 B2 · Method for encoding/decoding block information using quad tree, and device for using same

Method for encoding/decoding block information using quad tree, and device for using same

AssigneesElectronics and Telecommunications Research Institute, Korea Advanced Institute of Science and Technology

InventorsJong Ho Kim, Hui Yong Kim, Se Yoon Jeong, Sung Chang Lim, Ha Hyun Lee, Jin Ho Lee, Suk Hee Cho, Jin Soo Choi, Jin Woong Kim, Chie Teuk Ahn, Mun Churl Kim, Bum Shik Lee

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Abstract

Disclosed decoding method of the intra prediction mode comprises the steps of: determining whether an intra prediction mode of a present prediction unit is the same as a first candidate intra prediction mode or as a second candidate intra prediction mode on the basis of 1-bit information; and determining, among said first candidate intra prediction mode and said second candidate intra prediction mode, which candidate intra prediction mode is the same as the intra prediction mode of said present prediction unit on the basis of additional 1-bit information, if the intra prediction mode of the present prediction unit is the same as at least either the first candidate intra prediction mode or the second candidate intra prediction mode, and decoding the intra prediction mode of the present prediction unit.

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Drawings

Claims3

Dependent claims

A video decoding apparatus using a quad tree structure, comprising:

an entropy decoder configured to
decode integrated code block flag information in an coding unit,
decode a split information flag based on the integrated code block flag information and size information of a transform unit,
decode a code block flag information in the transform unit in response to the transform unit not being additionally split into an additional transform unit based on the split information flag, and
decode transform coefficients in the transform unit;
and
an inverse transformer configured to inversely transform the transform coefficients received from the entropy decoder,
wherein the entropy decoder, after decoding the integrated code block flag information, does not decode the split information flag when the transform coefficients in the transform unit are absent,
the entropy decoder determines that the transform unit is not additionally split in response to a value of the split information flag being a predefined valueθ, and
decodes flag information indicating whether a Luma component in the transform unit includes a transform coefficient other than 0 into the code block flag information in response to the transform unit not being additionally split based on the split information flag, and
the entropy decoder decodes the integrated code block flag when a transform depth of the transform unit is 0 and decodes the split information flag indicating whether the transform unit is additionally split when the transform depth of the transform unit is 0.

8 more elements

Dependencies are inferred from the claim text.

Description10,736 words

Summary824 words

#This application is a National Phase entry of PCT Application No. PCT/KR2011/007326, filed on Oct. 4, 2011, which claims priority under 35 U.S. C. §119(c) and 365(c) to Korean Patent Application No. 10-2010-0096559, filed on Oct. 4, 2010; Korean Patent Application No. 10-2010-0131794, filed on Dec. 21, 2010; Korean Patent Application No. 10-2011-0049257, filed on May 24, 2011; and Korean Patent Application No. 10-2011-0100675, filed on Oct. 4, 2011, the entire disclosures of each of which are incorporated herein by reference for all purposes.

#The present invention relates to a block information encoding/decoding method using a quad tree and an apparatus using the same, and more particularly, to a video encoding/decoding method.

#Recently, with the expansion of broadcasting services having high definition (HD) resolution in the country and around the world, many users have been accustomed to a high resolution and definition video, such that many organizations have conducted many attempts to develop next-generation video devices. In addition, the interest in HDTV and ultra high definition (UHD) having a resolution four times higher than that of HDTV have increased and thus, a compression technology for higher-resolution and higher-definition video have been required.

Brief description of the drawings12 figures

#FIG. 1 is a block diagram showing a video encoding apparatus according to an exemplary embodiment of the present invention.

#FIG. 2 is a block diagram showing a video decoder according to another exemplary embodiment of the present invention.

#FIG. 3 is a flow chart showing a method for transmitting transform unit information using a quad tree structure according to another exemplary embodiment of the present invention.

Detailed description9,566 words

#Although the present invention can be modified variously and have several embodiments, the exemplary embodiments are illustrated in the accompanying drawings and will be described in detail in the detailed description. However, the present invention is not limited to the specific embodiments and should be construed as including all the changes, equivalents, and substitutions included in the spirit and scope of the present invention.

#Further, terms used in the specification, ‘first’, ‘second’, etc. can be used to describe various components, but the components are not to be construed as being limited to the terms. The terms are only used to differentiate one component from other components. For example, the first component may be called the second component without departing from the scope of the present invention. Likewise, the second component may be called the first component. The term ‘and/or’ includes a combination of a plurality of items or any one of a plurality of terms.

#In the case it is stated that any components are “connected” or “coupled” to other components, it is to be understood that the components may be directly connected or coupled to other components, but there is another component therebetween. On the other hand, in the case that it is stated that any components are “directly connected” or “directly coupled” to other components, it is to be understood that there is no another component therebetween.

Facts

Application

13/877,503Filed 4 Oct 2011

Priority

KR 10-2010-00965594 Oct 2010

Published

US 2013/0188731 A125 Jul 2013

Granted

10 Jan 2017

Term ends

10 Apr 2032

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 189 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification8 codes

H04N 19/44
Methods or arrangements for coding, decoding, compressing or decompressing digital video signals: decoders specially adapted therefor, e.g. video…
H04N 19/18
Characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the…: the…
H04N 19/46
Methods or arrangements for coding, decoding, compressing or decompressing digital video signals: embedding additional information in the video…
H04N 19/593
Using predictive coding: involving spatial prediction techniques

Timeline

4 Oct 2010Priority claimedKR 10-2010-0096559
4 Oct 2011Application filedUS 13/877,503
3 Apr 2013Assigned to Electronics and Telecommunications Research Institute, Korea Advanced Institute of Science and Technologyassignment of assignor's interest
25 Jul 2013PublishedUS 2013/0188731 A1
10 Jan 2017GrantedUS 9,544,595 B2
12 Oct 2026TodayWithin its term
10 Apr 2032Term endsEstimated, includes 189 days of adjustment