Question

A speech signal having approximate bandwidth of 4 KHz is sampled at a rate 10% higher than Nyquist rate. The maximum acceptable quantization error is 5% of peak amplitude. (a). Give the reason to sample signal at a rate higher than Nyquist rate? (b). Calculate the bit rate of this signal? (c). Draw block diagram of 2-stage TDM PCM transmitter system to transmit such speech signals. There are 128 channels at the Ist stage and there are 10 such group at the 2nd stage. (d). Calculate the bit rate required at each stage?

Answer 1

Answer:

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