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

[中文适用范围]： 本文件指定了语法和相应的解压缩过程，该解压缩过程能够在适度的压缩率下表示连续色调灰度或连续色调彩色数字图像而不会造成视觉损失。典型的压缩率在 2:1 到 18:1 之间，但根据图像的性质也可以更高。特别是，本文件中指定的语法和解码过程允许轻量级编码器和解码器实现，将端到端延迟限制为帧大小的一小部分。但是，确保这种延迟所必需的传输通道缓冲区模型的定义超出了本文件的讨论范围。本文件：——指定了将压缩图像数据转换为重建图像数据的解码过程；——指定了包含用于解释压缩图像数据的信息的代码流语法；——提供了将源图像数据转换为压缩图像数据的编码过程的指导。 [外文原描述]： This document specifies 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 18:1 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.