Problem
I. Telephone systems are designed to transfer voice signals (4000 Hz). When a voice signal is digitized using pulse code modulation, what is the sampling rate, and how many quantization levels are used? How much data does that generate in one second? Are these the same sampling rate and quantization levels as used on a CD? Can you verify your answer?
II. Hands-On Project 4: Telephone systems use a digital encoding scheme called B8ZS (pronounced"bates"), which is a variation on the bipolar-AMI encoding scheme.How does it work? Why is it used? Show an example using the binary string01101100000000010.