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在日本于1984年2月16日发射了BS-2广播卫星的电视伴音系统中,采用了准瞬时压扩PCM副载波技术。为了开发这项新技术,我们于1983年7月开始,对这项技术从理论上进行了全面的剖析,在此基础上,提出了实现这种伴音系统的总体方案;设计了完整的部件和电路。之后,与南京14所共同研制了接收设备,并于1984年5月31日零时在国内最先收到了BS-2播送的电视伴音信号。接着,采用这一方案的其它单位也相继收到了伴音信号。本文先概述几种卫星直播电视数字伴音体制的基本区别,然后重点对BS-2数字伴音系统的工作原理及所研制的总体结构,进行剖析和介绍。
In Japan’s television sound system, which launched BS-2 broadcasting satellite on February 16, 1984, the quasi-instantaneous PCM PCM subcarrier technology was adopted. In order to develop this new technology, we began in July 1983, the technology from a comprehensive analysis of the theory, on this basis, put forward the overall program to achieve this sound system; designed a complete component and Circuit. After that, it jointly developed the receiving equipment with 14 Nanjing stations and received the television audio signal broadcast by BS-2 first at home on May 31, 1984 at 0:00 on the 31st of May, 1984. Then, other units using this program have also received a sound signal. This article first outlines the basic differences between several satellite live broadcast digital audio systems, and then focuses on the working principle of BS-2 digital sound system and the overall structure of the development, analysis and introduction.