涵盖了支持通过窄带返回频道向家庭广播的交互式服务的核心DVB要求。本ETS中定义的系统通过采用DSM-CC用户使用MPEG2中规定的r、下载和对象转盘协议，为各种未来交互服务提供了通用解决方案。交互服务在系统上提供，包括从服务提供商到服务消费者的高比特率下行信道（最高可达广播信道的最大比特率）和低比特率交互信道（最高可达150 kbit/s）。广播服务提供商r和交互服务提供商不需要从同一位置操作。这些服务主要是通过互动增强的数字视频广播。 在最简单的层面上，互动频道允许消费者通过投票做出反应，订购广播节目中显示的物品，选择特定的节目花束，或在近视频点播系统中选择e电影。也可以在dema nd上传送文本、图形、音频和静态图片（包括电子邮件），尽管这可能需要更高比特率的交互式频道。有许多可能的网络配置涵盖了当前指定的DVB广播选项，包括卫星、地面、有线电视、SMATV和MMDS，以及PSTN、ISDN、有线电视和其他交互式频道选项。ETS 300 800/801和ETS 300 803中规定了网络相关协议。通过这些类型的网络进行交互服务的影响在单独的指导文件DTR/JTC中描述- 00DVB-44为互动服务使用DVB网络独立协议提供指南，该指南还将总结本ETS中确定的协议的功能。

Covers the core DVB requirements to enable interactive services suppor ting broadcasting to the home with narrowband return channels. The sys tem defined in this ETS provides a generic solution for a variety of f uture interactive services, through the adoption of DSM-CC User-to-Use r, Download and Object Carousel protocols, as specified in MPEG2. The interactive services are provided on systems consisting of a high bitr ate downstream channel (up to the maximum bitrate of the Broadcast cha nnel) from the Service Providers to Service consumers and low bitrate interaction channels (up to 150 kbit/s). The Broadcast Service Provide r and the Interactive Service Provider need not operate from the same location. The services are primarily digital video broadcast enhanced with interactivity. At the simplest level the Interactive channel allo ws the consumer to react by voting, to order articles displayed in the broadcast programme, to select certain programme bouquets or to choos e movies in near-video-on-demand systems. It is also possible to deliv er text, graphics, audio and still pictures (including e-mail) on-dema nd, although this may require an interactive channel with higher bitr ates. There are many possible network configurations covering the currently specified DVB broadcast options including satellite, terrestrial, cabl e, SMATV and MMDS in conjunction with PSTN, ISDN, cable and other Inte ractive channel options. The network dependent protocols are specified in ETS 300 800/801 & ETS 300 803. The implications for interactive services via these types of networks are described in a separate guidelines document DTR/JTC-00DVB-44 Guid elines for the use of the DVB network-independent protocols for intera ctive services which will also summtrise the functionality of the pro tocols identified in this ETS.