摘要 : Following on from the early success of the Digital Video Broadcasting (DVB) Project, the next step is to enable DVB-compliant receivers to support an attractive range of interactive services. Various types of interactive services ... 展开 Following on from the early success of the Digital Video Broadcasting (DVB) Project, the next step is to enable DVB-compliant receivers to support an attractive range of interactive services. Various types of interactive services are described. The implications for standards are then listed and the specifications summarised. The specifications include a set of network-independent protocols, as well as specifications for the most popular types of networks for the interaction channel. These cover the public switched telephone network (PSTN) and its digital equivalent (ISDN), as well as cable TV networks. The opportunity exists to enhance the consumer experience by adding interactivity to digital broadcasting. DVB is putting in place some of the enablers to make this a reality. 收起