KR-20260066741-A - A video encoding/decoding method based on SEI (SUPPLEMENTAL ENHANCEMENT INFORMATION) messages, an apparatus, and a recording medium storing a bitstream

KR20260066741AKR 20260066741 AKR20260066741 AKR 20260066741AKR-20260066741-A

Abstract

A method and apparatus for video encoding/decoding are provided. The video decoding method performed in the video decoding apparatus according to the present disclosure comprises the steps of receiving a bitstream containing video information and generating a restored picture by restoring a current picture based on the video information, wherein the video information may include a Source Picture Timing Information (SPTI) SEI message regarding the temporal distance between source pictures associated with corresponding decoded pictures.

Inventors

탄헨드리
남정학
임재현
김승환

Assignees

엘지전자 주식회사

Dates

Publication Date: 20260512
Application Date: 20241004
Priority Date: 20231004

Claims (11)

In a video decoding method performed in a video decoding device, the video decoding method comprises: A step of receiving a bitstream containing video information; and The method includes the step of generating a restored picture by restoring the current picture based on the above image information, The above image information includes an SPTI (Source Picture Timing Information) SEI message regarding the temporal distance between source pictures related to the corresponding decoded pictures, Video decoding method.
In paragraph 1, The above SPTI SEI message includes persistence information indicating whether the above SPTI SEI message applies only to the current decoded picture, Video decoding method.
In paragraph 2, The above SPTI SEI message comprises at least one of first information indicating the maximum number of temporal sublayers, second information indicating a scale factor used to determine the time interval between source pictures corresponding to the decoded picture, or third information indicating whether the current decoded picture belonging to the temporal sublayer has been synthesized. Video decoding method.
In paragraph 3, The above first information, second information, and third information are obtained based on the above persistence information, Video decoding method.
In paragraph 4, The above first information, second information, and third information are obtained based on the persistence information indicating that the SPTI SEI message is not applied only to the current decoded picture, Video decoding method.
In paragraph 4, The above second information and the above third information are obtained based further on the value of the above first information, Video decoding method.
In paragraph 4, Based on the fact that the above second information is not obtained, the value of the above second information is inferred to be 1, Video decoding method.
In paragraph 1, Based on the fact that the above persistence information indicates that the SPTI SEI message applies only to the current decoded picture, the source picture interval is the same as the elemental source picture interval, Video decoding method.
In a video encoding method performed in a video encoding device, the video encoding method is, A step of generating image information regarding the current picture; and The method includes the step of encoding a bitstream containing the above-mentioned image information, The above image information includes an SPTI (Source Picture Timing Information) SEI message regarding the temporal distance between source pictures related to the corresponding decoded pictures, Video decoding method.
A computer-readable recording medium storing a bitstream generated by the image encoding method of claim 9.
In a method for transmitting a bitstream generated by a video encoding method, the video encoding method comprises: A step of generating image information regarding the current picture; and The method includes the step of encoding a bitstream containing the above-mentioned image information, The above image information includes an SPTI (Source Picture Timing Information) SEI message regarding the temporal distance between source pictures related to the corresponding decoded pictures, Bitstream transmission method.

Description

Image encoding/decoding method based on SEI (SUPPLEMENTAL ENHANCEMENT INFORMATION) messages, device, and recording medium storing bitstream Image encoding/decoding method based on SEI (SUPPLEMENTAL ENHANCEMENT INFORMATION) messages The present disclosure relates to an image encoding/decoding method, an apparatus, and a recording medium for storing a bitstream, and more specifically, to an image encoding/decoding method and apparatus based on Supplemental Enhancement Information (SEI) messages, and a recording medium for storing a bitstream generated by the image encoding method/apparatus of the present disclosure. Recently, the demand for high-resolution, high-quality video, such as HD (High Definition) and UHD (Ultra High Definition), has been increasing across various fields. As video data becomes higher in resolution and quality, the relative amount of information or bits transmitted increases compared to conventional video data. This increase in transmitted information or bits leads to higher transmission and storage costs. Accordingly, high-efficiency video compression technology is required to effectively transmit, store, and play back high-resolution, high-quality video information. FIG. 1 is a schematic diagram illustrating a video coding system to which an embodiment according to the present disclosure can be applied. FIG. 2 is a schematic diagram showing an image encoding device to which an embodiment according to the present disclosure can be applied. FIG. 3 is a schematic diagram showing an image decoding device to which an embodiment according to the present disclosure can be applied. FIG. 4 illustrates an example of a coding layer and structure to which an embodiment according to the present disclosure can be applied. FIG. 5 is a flowchart of an image encoding method according to the present disclosure. FIG. 6 is a flowchart of an image decoding method according to the present disclosure. FIG. 7 is a diagram illustrating an exemplary content streaming system to which an embodiment of the present disclosure can be applied. Hereinafter, embodiments of the present disclosure are described in detail with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. In describing the embodiments of the present disclosure, detailed descriptions of known configurations or functions are omitted if it is determined that such descriptions could obscure the essence of the present disclosure. Additionally, parts of the drawings unrelated to the description of the present disclosure have been omitted, and similar parts are denoted by similar reference numerals. In the present disclosure, when a component is described as being "connected," "combined," or "joined" with another component, this may include not only a direct connection but also an indirect connection in which another component exists in between. Furthermore, when a component is described as "comprising" or "having" another component, this means that, unless specifically stated otherwise, it does not exclude the other component but may include an additional component. In the present disclosure, terms such as first, second, etc. are used solely for the purpose of distinguishing one component from another and do not limit the order or importance of the components unless specifically stated otherwise. Accordingly, within the scope of the present disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and likewise, a second component in one embodiment may be referred to as a first component in another embodiment. In this disclosure, distinct components are intended to clearly describe their respective features and do not imply that the components are separate. That is, multiple components may be integrated to form a single hardware or software unit, or a single component may be distributed to form multiple hardware or software units. Accordingly, such integrated or distributed embodiments are included within the scope of this disclosure, unless otherwise noted. In the present disclosure, the components described in various embodiments do not necessarily mean essential components, and some may be optional components. Accordingly, embodiments consisting of a subset of the components described in one embodiment are also included within the scope of the present disclosure. Furthermore, embodiments including other components in addition to the components described in various embodiments are also included within the scope of the present disclosure. The present disclosure relates to the encoding and decoding of images, and the terms used in the present disclosure may have the ordinary meanings commonly used in the technical field to which the present disclosure belongs, unless newly defined in the present disclosure. In the present disclos