【多选题】Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks? ()
A.
The three required steps in the analog to digital conversion are sampling, encoding, and compression.
B.
The three required steps in the analog to digital conversion are sampling, quantization, and compression.
C.
The three required steps in the analog to digital conversion are sampling, quantization, and encoding.
D.
The output of the sampling process is a pulse code modulation (PCM) signal.
E.
The output of the sampling process is a pulse amplitude modulation (PAM) signal.
【判断题】Sweating, twitches of muscles, and changes in voice tone are signals of anxiety.
【单选题】边坡病害体治理稳定性分析标准中,等级为II的边坡,发生整体失稳的概率为()
【简答题】What is the emission designation for MF/HF voice signals?A. FIB. B. J3E. C. J2B. D. F3E.
【简答题】Telephone-quality og voice signals
【单选题】The telephone contains a transmitter and receiver for converting back and forth analog voice and analog electrical signals.