After quantization, the quantized levels are encoded using n bits for each quantized level. If N is a power of 2 or N = 2n, then n bits are required for representation of each level. It is assumed that the analog signal is distributed on an interval denoted by of length 2Xmax is divided into N equal subintervals, each of length A = (2Xmax) / N. In PCM an analog signal is first sampled at a rate higher than the Nyquist rate, and then the samples are quantized. But, a digital signal amplitude can only take finite number of values. ![]() This means that it can take on an infinite number of values. ASSIGNMENT 3 Telecommunication Principles (TCEE3741) 2021 Pulse Code Modulation Theory Pulse Code Modulation (PCM) is a method of converting an analog signal into a digital signal (A/D conversion) An analog signal is characterized by the fact that its amplitude can take on any value over a continuous range.
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