论文部分内容阅读
中国数据广播中心在有线电视网络信息化建设研究和推广方面,已经卓有成效,目前与国内二百余家有线电视台已经建立良好的合作关系。经过一年的研制、开发,在今年推出了高速多媒体据传输系统(High-speed multimediumData Transmission system 简称 HDT)。利用本系统即可以建立一个“高速多媒体信息传输通道”,为广大观众提供快捷、精彩的多媒体信息。该系统采用最的 QPSK 调制技术,将一个8MHz 带宽的频道调制成一个数据传输通道,使得总体传输速率达到8Mbps(相当于每秒50万个汉字的传输
China Data Broadcasting Center has made remarkable achievements in the research and promotion of the informatization construction of the CATV network. At present, it has established good cooperative relations with more than 200 domestic cable television stations. After a year of research and development, this year launched a high-speed multimedia transmission system (High-speed multimediumDataTransmissionystem referred to as HDT). The system can be used to establish a “high-speed multimedia information transmission channel” for the general audience to provide fast, exciting multimedia information. The system uses the most QPSK modulation technology, an 8MHz bandwidth channel modulation into a data transmission channel, making the overall transmission rate of 8Mbps (equivalent to 500000 characters per second transmission