一、电视数字化发展的动因所谓数字电视 ,是将活动图像、声音和数据 ,通过数字技术进行压缩、编码、传输、存储 ,实时发送、广播 ,供观众接收、播放的视听系统。真正意义的数字电视系统 ,不仅仅是电视节目的制作和播出实现数字化 ,还包括电视节目的传送 ,无论其是通过卫星、有 I. Motive for the Development of Digital TV So-called digital television is an audio-visual system that compresses, encodes, transmits, stores, transmits real-time, broadcasts, and receives and plays the moving images, sounds and data through digital technologies. Real digital TV systems not only digitize the production and playout of television programs, but also the delivery of television programs, whether via satellite or not