第一代电视传播是广播电视，电视台通过发射塔向周围地区发射节目信号，凡是电波能到达的地方，不用办理任何手续、不用付费，可以任意收看。第二代电视传播是窄播或称狭播电视，它以光纤电缆传输为代表包括加密卫星电视和双向电视等，第二代电视只有办了手续交了钱的用户才能 The first generation of television broadcasting is radio and television, television stations through the launch tower to launch the program signals to the surrounding area, where the radio can reach, do not go through any formalities, do not pay, you can watch. The second generation of television transmission is narrowcasting or narrowcasting television, which uses optical fiber cable transmission as the representative, including encrypted satellite television and two-way television, the second generation of television only to do the formalities to pay the user money