ISO/IEC 21122-1:2022 信息技术 JPEG XS低延迟轻量级图像编码系统 第1部分：核心编码系统

标准编号：ISO/IEC 21122-1:2022

中文名称：信息技术 JPEG XS低延迟轻量级图像编码系统 第1部分：核心编码系统

英文名称：Information technology — JPEG XS low-latency lightweight image coding system — Part 1: Core coding system

发布日期：2022-03

标准范围

ISO/IEC 21122-1:20 22该文档定义了语法和伴随的解压缩过程，该解压缩过程能够以中等压缩率表示连续色调灰度或连续色调彩色数字图像而没有视觉损失。典型的压缩率在2:1和6:1之间，但也可以更高，这取决于图像的性质。具体地，本文档中指定的语法和解码过程允许将端到端等待时间限制为帧大小的一部分的轻量级编码器和解码器实现。然而，确保这种延迟所必需的传输信道缓冲器模型的定义超出了本文档的范围。本文件:-指定用于将压缩图像数据转换为重构图像数据的解码过程；-指定包含用于解释压缩图像数据的信息的码流语法；-提供关于将源图像数据转换为压缩图像数据的编码过程的指导。

ISO/IEC 21122-1:2022 This document defines the syntax and an accompanying decompression process that is capable to represent continuous-tone grey-scale, or continuous-tone colour digital images without visual loss at moderate compression rates. Typical compression rates are between 2:1 and 6:1 but can also be higher depending on the nature of the image. In particular, the syntax and the decoding process specified in this document allow lightweight encoder and decoder implementations that limit the end-to-end latency to a fraction of the frame size. However, the definition of transmission channel buffer models necessary to ensure such latency is beyond the scope of this document.
This document:
- specifies decoding processes for converting compressed image data to reconstructed image data;
- specifies a codestream syntax containing information for interpreting the compressed image data;
- provides guidance on encoding processes for converting source image data to compressed image data.

标准预览图