the digital tv broadcasting samples, measures and encodes traditional analog signals . then it converts them into binary digital signals . after that the digital tv broadcasting processes various functions management, compressing, transmission, storage and record 数字电视是将传统的模拟信号经过抽样,量化和编码转换成二进制数代表的数字式信号,然后进行各种功能的处理,压缩,传输,存储和记录,也可以用计算机进行处理,监测和控制。