本标准定义了用于传输实时恒定比特率（CBR）的单向传输协议 MPEG-2通过IP网络传输流。对于专业应用，MPEG-2使用4:2:2P@ML 简介是目前的正常做法。然而，包含其他形式的MPEG-2和 该标准还支持封装为MPEG-2传输流的较新MPEG标准。

This standard defines a unidirectional transport protocol for the carriage of real-time Constant Bitrate (CBR) MPEG-2 Transport Streams over IP networks. For professional applications, MPEG-2 using the 4:2:2P@ML profile is currently the normal practice. However, Transport Streams containing other forms of MPEG-2 and newer MPEG standards encapsulated as MPEG-2 Transport Streams are also supported by this Standard.