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数字电视接收的图像和伴音质量比模拟电视有明显提高 ,其信道带宽只有模拟电视的几分之一 ,不仅频谱资源利用率高 ,而且节省每路电视的传输费用 ,提高了电视台的经济效益。卫星数字电视广播直接到家庭(ＤＴＨ -ＤｉｒｅｃｔＴｏＨｏｕｓｅ)是普及电视覆盖的最佳途径之一。本文
The quality of images and sound quality received by digital TV is obviously higher than that of analog TV. Its channel bandwidth is only a fraction of that of analog TV. Not only the utilization of spectrum resources is high, but also the transmission cost per channel is saved and the economic benefits of television stations are improved. DTH-DirectToHouse is one of the best ways to reach TV coverage. This article