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当今社会已经进入数字化时代,电视广播系统的全面数字化是大势所趋。相对于传统的固定接收模式的模拟电视,数字化电视不仅极大地改善了人们收看电视节目的质量,而且提供了更加人性化和更加方便自由的收看方式。且前,我国数字电视按信号传输方式可以分为地面无线传输数字电视、卫星传输数字电视、有线传输数字电视3类。数字电视地面广播虽然容易实现移动和便携接收的功能,但对整个技术系统的要求最高。它具备无线数字系统所共有的优点:与卫星接收相比,有实现容易、价格低廉的特点;与有线接收相比,不易受城市施工建设、自然灾害、战争等因素造成的断网影响。因此,数字电视地面广播技术给传统的收看电视方式带来了新的变化,孕育着创造一个新的移动电视市场的机遇,其应用前景将更加深远。
Today’s society has entered the digital age, and the full digitization of the television broadcasting system is the trend of the times. Compared with the traditional fixed receiving mode of analog TV, digital TV not only greatly improves the quality of people watching TV, but also provides a more humane and more convenient free to watch. And before, China’s digital television by signal transmission can be divided into terrestrial wireless transmission of digital television, satellite digital television transmission, digital cable transmission of three categories. Digital television terrestrial broadcasting, although easy to implement for mobile and portable reception, requires the highest technical system. It has the advantages of wireless digital systems in common: compared with satellite reception, easy to implement, low cost characteristics; compared with the wired reception, less susceptible to urban construction and construction, natural disasters, war and other factors caused by the break network. As a result, digital terrestrial broadcasting technology has brought new changes to the traditional way of watching television, creating opportunities for creating a new mobile TV market with far-reaching application prospects.