信息技术 基于JPEG AI学习的图像编码系统 第1部分：核心编码系统

[中文适用范围]： 本文件规定了一种称为基于人工智能学习的图像编码技术（JPEG AI）的图像编码技术，该技术有助于实现图像在人类视觉与机器视觉方面的压缩与处理。JPEG AI文件的适用范围是创建一种基于学习的图像编码标准，该标准提供单一数据流的紧凑压缩域表示，目标是实现与当前常用图像编码标准相比，在等效主观质量下具有显著的压缩效率提升，同时在图像处理和计算机视觉任务中表现出色。核心编码系统描述了JPEG AI标准在人类视觉重建任务中的应用，因此，该文件规定了JPEG AI编码流的解析和图像重建过程。仅对语法格式、语义及相关的解码过程需求进行了规定，而诸如预处理、编码过程、系统信令与复用、数据丢失恢复、后处理及视频显示等事项则视为超出本文档范围。该文件旨在具有通用性，适用于各种应用场景、比特率、分辨率、质量和服务。在制定该文件的过程中，已考虑了典型应用中的多个需求，开发了必要的算法元素，并将这些内容整合到单一语法中。因此，该文件旨在促进不同应用和服务之间图像数据的互操作性。 [外文原描述]： This document specifies an image coding technology known as JPEG AI learning-based image coding (JPEG AI) comprising an image coding technology that facilitates the compression and processing of images for both human and machine vision. The scope of the JPEG AI document is the creation of a learning-based image coding standard offering a single-stream, compact compressed domain representation, targeting both human visualization, with significant compression efficiency improvement over image coding standards in common use at equivalent subjective quality, and effective performance for image processing and computer vision tasks. The core coding system describes JPEG AI standard for the human vision reconstruction task and thus specifies the JPEG AI specifies the parsing coded stream and the image reconstruction process. Only the syntax format, semantics, and associated decoding process requirements are specified, while other matters such as pre-processing, the encoding process, system signalling and multiplexing, data loss recovery, post-processing, and video display are considered to be outside the scope of this document. This document is designed to be generic in the sense that it serves a wide range of applications, bit rates, resolutions, qualities and services. In the course of creating this document, several requirements from typical applications have been considered, necessary algorithmic elements have been developed, and these have been integrated into a single syntax. Hence, this document is designed to facilitate image data interchange among different applications and services.