IEC 62574:2020 音频 视频和多媒体系统 - 多声道音频的通用信道分配
标准编号：IEC 62574:2020
中文名称：音频 视频和多媒体系统 - 多声道音频的通用信道分配
英文名称：Audio, video and multimedia systems - General channel assignment of multichannel audio
发布日期：2020-01-31
标准范围
IEC 62574:2020作为IEC 62574:2020 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 62574:2020规定了多声道音频格式的通用声道分配和元数据。该文档及其信道映射和标签内容提供了源设备、数字音频接口和接收器设备的信道分配的统一用法。通用声道分配不包括每个扬声器的确切位置的规范。元数据具有每个扬声器的确切位置；然而，由于扬声器的位置在各种环绕声格式中不同，因此元数据的位置信息不是标准化的。它面向消费者应用；它不针对剧院环境。显示器上最多指定65个扬声器位置标签和15个扬声器标签，可用于所有当前的多声道音频格式。频道分配概念是以房间为中心和以听众为中心。该通用声道分配指定了从收听者处看到的扬声器的位置。IEC 62574:2020取消并取代了2011年发布的第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更:a)改变信道分配空间的模型；b)改变了通道映射和标签的定义；c)元数据是新指定的；d)第一版的频道地图和标签包含在附录A中。
IEC 62574:2020 is available as IEC 62574:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62574:2020 specifies the general channel assignment and the metadata for multichannel audio format. This document, with its channel mapping and labelling content, provides the unified usage of channel assignments for source devices, digital audio interfaces and sink devices. The general channel assignment excludes the specification of the exact position of each loudspeaker. The metadata has the exact position of each loudspeaker; however, since the position of the loudspeaker is different in various surround sound formats, the position information of the metadata is not standardized. It is aimed at consumer applications; it is not targeted at theatrical environments. Up to 65 labels for loudspeaker positions and 15 labels for loudspeakers on the display are specified, which can be used for all current multichannel audio formats. The channel assignment concept is room centric and listener centric. This general channel assignment specifies the position of the loudspeaker as seen from the listener.
IEC 62574:2020 cancels and replaces the first edition published in 2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) model of channel assignment spaces is changed;
b) definition of channel maps and labels is changed;
c) metadata is newly specified;
d) channel maps and labels from the first edition are included in Annex A.
标准预览图
