Consider an audio signal having negligible content above 3.6KHZ. It is desired te transmit this signal using a PCM system. Assumef,= 8kHz, and that the ratio o peak signal power to average quantization noise power at the output needs to b 30 dB. (a) What is the minimum number of uniform quantization levels needed? (b) What is the minimum number of bits per sample needed?
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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