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数字电视是消费类电子视听产品制造业和广播电视产业发展的重要趋势。与我们目前收看的模拟电视相比,数字电视图像分辨率更高,音质更好,高清节目具有很强的临场感、逼真性和感染力,而且数字电视技术极大地提高了频谱效率。现在很多国家已经开始从模拟电视转向数字电视广播,并将逐步停止播出模拟电视节目。由于数字电视的广泛应用,研究地面施工过程显得尤为重要,以下就针对这个问题进行论述。
Digital television is an important trend in the development of consumer electronics audiovisual products manufacturing and radio and television industries. Compared with the analog TV we currently watch, digital TV images have higher resolution and better sound quality, and high-definition programs have a strong presence, vividness and appeal, and the digital TV technology greatly improves the spectral efficiency. Many countries are now moving from analogue television to digital television broadcasting and will gradually stop broadcasting analogue television programs. Due to the wide application of digital television, it is very important to study the process of ground construction. The following is a discussion of this issue.