Comd 5070 Exam 1 Week 4 (Digital Systems) Questions And Answers

Digital Signals: Time & Amplitude {Ans: Digital recordings are discrete in time and in amplitude. The digital signal is a series of separate numbers that are recorded in one long string. These numbers are a little bit like having a series of snapshots over time that represent a visual image.}Quantization - Level of Detail, Orienting to the Diagram {Ans: In each of the three panels you'll see a sine wave going up and down, this represents an analog signal as it increases and decrease over time. It's continuous in time; there are no separate samples going from left to right; it just keeps going. In terms of the voltage going up and down on the y-axis, there are no discrete steps. The voltage is infinitely variable. You could zoom in and zoom out and see any amplitude value at all, between the minimum and the maximum.}How Does a Sound Become Digital? Computers {Ans: Computer sound cards will perform this operation in either direction. Why? Computers only deal with binary data - they do not work with analog signals directly. (binary data: ones or zeroes) Microphones/speakers are analog devices}Sampling Rate - Join the Dots: Reading the Results