2021-03-08到2021-06-21
1st Week： Unit 1 Introduction Unit Test for Unit 1
1、 If you want to digitize the speech signal for subsequent processing, the speech signal must be passed through:
A:anti-aliasing analog filter
B:D / A conversion
C:digital filter
D:A / D conversion
答案: anti-aliasing analog filter;
A / D conversion
2、 The digital signal is a discrete-time signal with discrete-valued amplitudes