A television signal (video and audio) has a bandwidth BW=4.2 MHz. This signal is sampled, quantized and binary coded to obtain a PCM signal. Answer the following: a) Determine the sampling rate if the signal is to be sampled at a rate 20% above the Nyquist rate. b) If the samples are quantized into 1024 levels, determine the number of binary pulses required to encode each sample. c) Determine the binary pulses rate (bits per second) of the binary-coded signal, and the minimum bandwidth required to transmit this signal.
Quantization and Resolution
Quantization is a methodology of carrying out signal modulation by the process of mapping input values from an infinitely long set of continuous values to a smaller set of finite values. Quantization forms the basic algorithm for lossy compression algorithms and represents a given analog signal into digital signals. In other words, these algorithms form the base of an analog-to-digital converter. Devices that process the algorithm of quantization are known as a quantizer. These devices aid in rounding off (approximation) the errors of an input function called the quantized value.
Probability of Error
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