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信息化时代,数字技术被广泛使用,如微电脑、数码相机、数码电视、智能手机等。在数字电路中,由于数字信号只有0、1两个状态,它的值是通过中央值来判断的,在中央值以下规定为0,以上规定为1。所以,即使混入了其他干扰信号,只要干扰信号的值不超过阈值范围,就可以再现出原来的信号。与模拟信号相比,数字信号在传输过程中具有更高的抗干扰能力、更远的传输距离,且失真幅度小。数字信号在传输过程中不仅具有较高的抗干扰性,还可以通过压缩,占用较少的带
In the information age, digital technologies are widely used, such as microcomputers, digital cameras, digital TVs, smartphones and the like. In the digital circuit, because the digital signal has only 0,1 two states, its value is judged by the central value, below the central value stipulates as 0, the above stipulation is 1. Therefore, even if other interference signals are mixed, the original signal can be reproduced as long as the value of the interference signal does not exceed the threshold range. Compared with the analog signal, the digital signal in the transmission process has a higher anti-interference ability, longer transmission distance, and the distortion amplitude is small. Digital signal in the transmission process not only has high anti-interference, but also by compression, take up less with the band