Samsung Electronics Co., Ltd.

Byeong-doo Choi

Tammy Lee

Jeong-Hoon Park

Woo-jin Han

Jae-Hyun Kim

Elena Alshina

Alexander Alshin

Nikolay Shlyakhov

Yoon-mi Hong

Il-koo Kim

Young-o Park

Seung-soo Jeong

Chan-yul Kim

Provided are a video encoding method and apparatus having temporal scalability, and a video decoding method and apparatus having temporal scalability. The video encoding method includes: splitting pictures included in a picture sequence into temporal sub-layers; classifying, as a first temporal layer access picture or a second temporal layer access picture, a temporal layer access picture based on whether a picture encoded after the temporal layer access picture is capable of referring to a picture encoded before the temporal layer access picture; and adding, to transmission unit data including the temporal layer access picture, type syntax information for identifying the first temporal layer access picture and the second temporal layer access picture, wherein the picture encoded after the temporal layer access picture belongs to a same temporal sub-layer as the temporal layer access picture or belongs to an upper temporal sub-layer to the temporal layer access picture.

Method and apparatus for coding video having temporal scalability, and method and apparatus for decoding video having temporal scalability

Provided are a video encoding method and a video decoding method according to spatial subdivisions based on splitting a picture into a first tile and a second tile, and splitting a current tile among the first tile and the second tile into at least one slice segment, encoding the first tile and the second tile, independently from each other, and encoding maximum coding units of a current slice segment among the at least one slice segment included in the current tile, with respect to the at least one slice segment included in the current tile.

Method and apparatus for video encoding for each spatial sub-area, and method and apparatus for video decoding for each spatial sub-area

A multilayer video encoding method includes encoding a multilayer video, generating network adaptive layer (NAL) units for data units included in the encoded multilayer video, and adding scalable extension type information, for a scalable extension of the multilayer video, to a video parameter set (VPS) NAL unit among the NAL units, the VPS NAL unit including VPS information that is information commonly applied to the multilayer video.

Method and apparatus for coding multilayer video to include scalable extension type information in a network abstraction layer unit, and method and apparatus for decoding multilayer video

A multi-view video prediction method and a multi-view video prediction restoring method. The multi-view video prediction method includes generating a base layer image stream including residual values of I-picture base view key pictures and base view images of a base view by performing inter prediction between the base view images; and generating an enhancement layer image stream comprising residual values of additional view images of an additional view by performing inter-view prediction for predicting the additional view images with reference to the base view images, performing inter prediction for predicting a different additional view key picture with reference to an additional view key picture from among the additional view images, and performing inter prediction for predicting an additional view image other than the additional view key picture with reference to the additional view images.

Method for multiview video prediction encoding and device for same, and method for multiview video prediction decoding and device for same

A multiview video decoding method includes receiving a base view image stream of a base viewpoint and additional view image streams of at least two additional viewpoints, restoring base view images by performing motion compensation that references base view anchor pictures of an I-picture type, by using the base view image stream, restoring a view decoding refresh image configured for viewpoint switching for changing a first additional viewpoint, by performing disparity compensation that references at least one of the restored base view images, on a first additional view image stream, and restoring first additional view images of the first additional viewpoint by performing at least one of disparity compensation that references the restored base view images and motion compensation that references restored images of the first additional viewpoint excluding the view decoding refresh image that precedes the restored first additional view images, on the first additional view image stream.

Method and apparatus for multiview video encoding based on prediction structures for viewpoint switching, and method and apparatus for multiview video decoding based on prediction structures for viewpoint switching

Provided are methods and apparatuses for encoding and decoding a multiview video. The method of decoding the multiview video includes obtaining a data unit including encoding information of texture pictures and depth map pictures of a multiview image related to a same point of time, obtaining, from the data unit, view information of pictures that are encoded and are included in the data unit, type information indicating a type of each of the pictures from among the texture pictures and the depth map pictures, and reference flag information indicating whether each of the pictures is previously inter-layer predicted by referring to a texture picture of the same point of time or to a depth map picture of the same point of time, determining an encoding order of the pictures, based on the obtained information, and decoding the texture pictures and depth map pictures based on the determined encoding order.

Multiview video encoding method and device, and multiview video decoding method and device

A multi-view video encoding method multiplexes an encoded multi-view image by a predetermined data unit and adds a scalable extension type (SET) indicating which view of image among a basic view image and an additional view image is related to data included in the predetermined data unit, a depth flag indicating which image is related to the data among a texture image and a depth map image, and a view ID of the data to a header of the predetermined data unit.

Provided are a method and apparatus for decoding a multiview video and a method and apparatus for encoding a multiview video. The decoding method includes: receiving multiview image streams that configure the multiview video; obtaining, from a predetermined data unit header that includes information of a base-view picture included in a base-view image stream, picture order count (POC) information of the base-view picture; determining, using the POC information of the base-view picture, a POC of the base-view picture, based on an instantaneous decoding refresh (IDR) picture of a base-view; and determining, using the POC of the base-view picture, a POC of an additional-view picture that is included in a same access unit as the base-view picture and is transmitted.

A decoding method includes obtaining random access point (RAP) reference layer number information indicating a number of layers referred to for performing inter layer prediction on RAP images among current layer images and non-RAP reference layer number information indicating a number of different layers referred to for performing inter layer prediction on non-RAP images, from a video stream including images encoded for a plurality of layers, obtaining RAP reference layer identification information for a layer referred to for predicting the RAP images based on the obtained RAP reference layer number information, from the video stream, obtaining non-RAP reference layer identification information for a layer referred to for predicting the non-RAP images based on the obtained non-RAP reference layer number information, and reconstructing a RAP image and a non-RAP image based on layer images indicated by the obtained RAP reference layer identification information and the obtained non-RAP reference layer identification information.

Method and apparatus for coding video stream according to inter-layer prediction of multi-view video, and method and apparatus for decoding video stream according to inter-layer prediction of multi view video

Video encoding and decoding accompanying inter prediction and motion compensation in a multi-view video prediction structure. A multi-view video prediction restoring method includes receiving a base view image stream and additional view image streams for two or more additional views; restoring base view images including base view anchor pictures that are I-picture type images by performing motion compensation referring to the base view images by using the base view image stream; and restoring images of a first additional view by performing at least one of disparity compensation referring to the restored base view images and motion compensation referring to images except for an anchor picture having a preceding reproduction order among the images of the first additional view by using an image stream of the first additional view among the additional view image streams.

Method and apparatus for encoding multi-view video prediction capable of view switching, and method and apparatus for decoding multi-view video prediction capable of view switching

Growing community of inventors

Siheung-si, South Korea

Byeong-doo Choi