US 10,257,540 B2 · Video encoding and decoding method and apparatus using the same

Abstract

The present invention is related to a method for moving the position of a base view from an arbitrary GOP (Group Of Pictures) start position to implement an efficient encoding structure in multi-view video encoding. The existing multi-view video encoding method exhibits low encoding efficiency when correlation between the base view and a dependent view is low, since the base view is assumed to be fixed. Moreover, in case the view in a live broadcasting program desired by a producer changes from the base view to another, the user has to consume more bit streams and decoder complexity than those consumed when decoding is performed with respect to the base view. Therefore, to alleviate the drawbacks of the existing multi-view video encoding method, the present invention provides a method for designing syntax elements by which the base view can be moved, thereby supporting an efficient encoding structure.

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Drawings

Claims9

Dependent claims

A method for video decoding that supports multi-layer videos, the method comprising:

analyzing a first layer dependency on a current layer based on a video parameter set (VPS) extension;
analyzing a second layer dependency on a current slice in the current layer based on information encoded in a slice unit, wherein the analyzing the second layer dependency on the current slice comprises determining, for the current slice, whether to use the first layer dependency of the VPS extension or the second layer dependency of the slice unit;
constructing a reference picture list for the current slice based on either one or both of the first layer dependency on the current layer and the second layer dependency on the current slice;
predicting a current block included in the current slice by using at least one reference picture included in the reference picture list to generate a prediction block;
generating a residual block of the current block;
and
reconstructing the current block by using the prediction block and the residual block,
wherein the reference picture list comprises a temporal reference picture belonging to a same layer as the current slice and an inter-layer reference picture belonging to a different layer from the current slice, and
wherein the inter-layer reference picture has a same picture order count (POC) value as the current slice.

6 more elements

A method for video encoding that supports multi-layer videos, the method comprising:

encoding a first layer dependency on a current layer into a video parameter set (VPS) extension;
encoding a second layer dependency on a current slice in the current layer into a slice unit, wherein the encoding the second layer dependency on the current slice comprises determining, for the current slice, whether to use the first layer dependency to be encoded into the VPS extension or the second layer dependency to be encoded into the slice unit;
constructing a reference picture list for the current slice based on either one or both of the first layer dependency on the current layer and the second layer dependency on the current slice;
predicting a current block included in the current slice by using at least one reference picture to be included in the reference picture list to generate a prediction block;
generating a residual block of the current block by using the prediction block;
and
encoding the residual block,
wherein the reference picture list comprises a temporal reference picture belonging to a same layer as the current slice and an inter-layer reference picture belonging to a different layer from the current slice, and
wherein the inter-layer reference picture has a same picture order count (POC) value as the current slice.

6 more elements

Dependencies are inferred from the claim text.

Description8,975 words

Summary1,059 words

#The present invention is related to image encoding and decoding and more particularly, a method for changing a base view in multi-view video encoding and apparatus using the method.

#As broadcasting services provided in HD resolution are spread globally, more people are getting used to high resolution, high quality images, and many organizations are accelerating development of next-generation image devices. In addition to HDTVs, public attention to UHD (Ultra High Definition) TVs, which provide videos in a resolution more than four times the resolution of HDTV, is increasing; thus, demand for a technology capable of compressing images of higher resolution and higher quality is getting larger.

#To implement image compression, various technologies can be employed, including: inter-prediction technology estimating pixel values in a current picture by using the pictures located temporally before and/or after the current picture, intra-prediction technology estimating pixel values of a current picture by using pixel information of the current picture, and entropy coding technology assigning short code words to frequently appearing symbols but longer code words to those symbols appearing in low frequency.

Brief description of the drawings7 figures

#The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of specifications of the present invention, illustrate embodiments of the present invention and together with the corresponding descriptions serve to explain the principles of the present invention.

#FIG. 1 is a block diagram illustrating the structure of an apparatus for video encoding according to one embodiment of the present invention;

#FIG. 2 is a block diagram illustrating the structure of an apparatus for video decoding according to one embodiment of the present invention;

Detailed description7,734 words

#In what follows, embodiments of the present invention will be described in detail with reference to appended drawings. In describing embodiments of the present invention, if it is determined that detailed description of a related structure or function known for those in the art obscures the technical principles of the present invention, the corresponding description will be omitted.

#If a component is said to be “linked” or “connected” to a different component, the component may be directly linked or connected to the different component, but a third component may exist to connect the two components. On the other hand, if a particular structure is said to be “included” in this document, it is not meant to exclude a structure other than the corresponding structure; rather, inclusion of the corresponding structure indicates that additional structures can be included in the embodiments or technical scope of the present invention.

#Terms such as first and second can be used for describing various structures but the structures should not be limited by the terms. The terms are introduced only for the purpose of distinguishing one structure from the others. For example, a first structure may be called a second structure without departing from the scope of the present invention and vice versa.

Facts

Application

15/878,662Filed 24 Jan 2018 · continuation

Priority

KR 10-2012-015637328 Dec 2012

Published

US 2018/0152729 A131 May 2018

Granted

9 Apr 2019

Term ends

27 Dec 2033

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term 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.

Classification10 codes

H04N 19/597
Using predictive coding: specially adapted for multi-view video sequence encoding
H04N 19/105
Selection of coding mode or of prediction mode: selection of the reference unit for prediction within a chosen coding or prediction mode, e.g.…
H04N 19/31
Using hierarchical techniques, e.g. scalability: in the temporal domain
H04N 19/70
Methods or arrangements for coding, decoding, compressing or decompressing digital video signals: characterised by syntax aspects related to video…

Family

Application14/141,685Parent of this continuation · filed 27 Dec 2013

Application15/483,124Parent of this continuation · filed 10 Apr 2017

US 9,693,055 B2Parent of this continuation · filed 27 Jun 2017

US 2018/0152729 A1Pre-grant publication · published 31 May 2018

US 9,924,198 B2Parent of this continuation

Application15/483,124Parent of this continuation

US 2014/0184741 A1Published application

US 2017/0214942 A1Published application

US 10,257,540 B2This patent

From the US filing history. Foreign family members aren’t listed.

Video encoding and decoding method and apparatus using the same

Life of this patent

Video encoding and decoding method and apparatus using the same

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims9

Description8,975 words

Drawings

Classification10 codes

Life of this patent

Description8,975 words