论文部分内容阅读
问1:有线数字电视机顶盒的网络结构如何?答:有线数字电视机顶盒从网络角度分析可概括为如下4个主要单元,如图1所示。(1)网络接口单元该单元主要完成信号接收、变频和信号的解调。它主要包括:CATV、TUNER(调谐器)、QAM解调芯片、一级A/D转换及声表面波滤波器等相关组件。
Q: What is the network structure of a cable digital TV set-top box? A: The cable digital TV set-top box can be summarized as the following four main units from the network point of view, as shown in Figure 1. (1) network interface unit The unit to complete the signal reception, frequency conversion and signal demodulation. It mainly includes: CATV, TUNER (tuner), QAM demodulator chip, a level A / D conversion and surface acoustic wave filter and other related components.