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展望未来的电视分布网络,数字通信技术显示了若干优点,本文介绍数字电视标准的几个国际协议,并讨论了转移为数字演播室生产技术中,质量的根本性改进。此外,如果起初维持模拟式分布网络,则把数字信号处理应用于精确的解码器,特别是应用于彩色电视的家庭接收机,可使图象传输质量有重要改善。本文还详细报导了图象尖锐度和信噪比,以及抑制闪烁效应和亮度色度串扰等方面可获得的改善。
Looking forward to the future of television distribution networks, digital communications technologies show several advantages. This article introduces several international protocols for digital television standards and discusses the fundamental quality-of-delivery improvements for digital studio production technology. In addition, if the analog distribution network was initially maintained, the application of digital signal processing to accurate decoders, especially to home receivers for color televisions, has led to an important improvement in image transmission quality. This paper also reports in detail the sharpness and signal-to-noise ratio of the image, as well as the improvements that can be achieved in terms of suppressing flicker effects and luminance chroma crosstalk.