本文件描述了通过混合光纤同轴电缆网络（HFC）和主天线电视（MATV）装置进行数字电视广播的第二代基线传输系统。它规定了用于提供数字电视服务和通用数据流的信道编码、调制和低层信令协议系统。其范围如下:概述了数字有线电视的基线系统；它规定了数字信号处理，以便在不同制造商开发的设备之间建立兼容性。这是通过详细描述发送端的信号处理来实现的，而接收端的处理则由单独的实现来实现。 然而，为了确保互操作性，在本文中有必要提及接收端的某些实现方面。

The present document describes a second generation baseline transmission system for digital television broadcasting via Hybrid Fibre Coax (HFC) cable networks and Master Antenna Television (MATV) installations. It specifies the channel coding, modulation and lower layer signalling protocol system intended for the provision of digital television services and generic data streams.The scope is as follows:it gives a general description of the Baseline System for digital cable TV;it specifies the digital signal processing in order to establish compatibility between pieces of equipment developed by different manufacturers. This is achieved by describing in detail the signal processing at the transmitting side, while the processing at the receiving side is left open to individual implementations. However, for the purpose of securing interoperability it is necessary in this text to refer to certain implementation aspects of the receiving end.