SCTE 162将描述家庭网络中设备的紧急警报事件的元数据元素标准化，用于涉及将商业视频服务交付到家庭网络的应用。商业视频服务是特定服务提供商以直播或点播流形式提供的音频/视频内容的来源。其他标准定义了数字电缆接收设备（ANSI J-STD-042-A[2]）和IPTV终端设备（ATIS-0800012[1]）的紧急警报信号。家庭中能够访问商业视频服务的接收设备可能希望将此类内容放置在家庭网络上。SCTE 162定义了可由这些接收设备使用的元数据格式，用于向家庭网络中的客户端设备通知紧急警报信息，包括文本、音频和有关警报的特定细节（例如发起者和事件代码、严重性等）。 )。某些类型的警报非常紧急，会触发客户端设备立即切换到该服务提供商提供的另一个频道，该频道是描述警报细节的实时音频/视频源（“细节频道”）。这里描述的元数据格式为此类情况提供了指向详细信息通道的指针。当在模式中定义为“异常通道”的通道上输出实时编程时，客户端设备将保持对该通道的调谐，以接收警报的详细信息。

SCTE 162 standardizes metadata elements describing emergency alert events to devices in a home network, for applications involving the delivery of Commercial Video Services into the home network. Commercial Video Services are sources of audio/video content provided as live or on-demand streams from a particular service provider. Other standards define emergency alert signaling for digital cable receiving devices (ANSI J-STD-042-A [2]) and for IPTV terminal devices (ATIS-0800012 [1]). Receiving devices in the home with access to Commercial Video Services may wish to place such content on a home network. SCTE 162 defines a metadata format usable by these receiving devices to notify client devices in the home network of emergency alert information including text, audio, and specific details about the alert (such as originator and event code, severity, etc.). Some types of alerts are urgent enough that they trigger client devices to immediately switch to another channel offered by that service provider which is a source of live audio/video describing details of the alert (the "Details Channel"). The metadata format described here provides a pointer to the Details Channel for such cases. When outputting live programming on a channel defined in the schema as an "Exception Channel," client devices remain tuned to that channel to receive details of the alert.