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一、数字电视的由来在电视的发展史上,从黑白电视到彩色电视的飞跃,被称为电视传播的一次革命。经历了100年,电视台传输的节目信号仍然是模拟信号,其音频和视频信号质量在传输过程中会受到干扰和损失,频道的拓展也受到限制。到了上个世纪80年代,随着计算机技术在广电业的运用,电视行业的设备商开始以改善电视信号质量为目的推出数字化摄录设备。此时,数字化只是一个技术概念。90年代,欧美和日本的广电业在技术上实现了电视节目采集、录制、播出、发射到接收全程运用数字编码和数字传输,形成了“数字电视”概念。1996年上海开始筹备数字电视,从而拉开了我国数字电视试验的序幕。
First, the origin of digital television In the history of the development of television, from black and white television to color TV leap, known as a television broadcast of a revolution. After 100 years, the program signals transmitted by the television stations are still analog signals, the quality of audio and video signals in the transmission process will be disturbed and lost, and the channel expansion is also limited. By the 1980s, with the use of computer technology in the broadcasting industry, the equipment manufacturers in the television industry began to launch digital video recording equipment aimed at improving the quality of television signals. At this point, digitization is just a technical concept. In the 1990s, the broadcasting and TV industry in Europe, the United States and Japan technically realized the concept of “digital television” by acquiring, recording, broadcasting and transmitting to receive the entire digital code and digital transmission. Shanghai began preparations for digital television in 1996, which opened the curtain of China’s digital television test.