标签:tween pre 数值 between wave git 限制 ssi sign
Digital Signals. Digital signals must have a finite set of possible values.
That‘s the big difference between analog and digital waves.
Analog waves are smooth and continuous, digital waves are stepping, square, and discrete.
信号数据可用于表示任何信息,如符号、文字、语音、图像等,从表现形式上可归结为两类:模拟信号和数字信号。模拟信号与数字信号的区别可根据幅度取什是否离散来确定。
数字信号指幅度的取值是离散的,幅值表示被限制在有限个数值之内。二进制码就是一种数字信号。二进制码受噪声的影响小,易于有数字电路进行处理,所以得到了广泛的应用。
标签:tween pre 数值 between wave git 限制 ssi sign
原文地址:http://www.cnblogs.com/kjyy/p/6604526.html