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Calculate the memory required to store 100 hours of voice conversation if the coding is done using (a) PCM at 64kbps (b) ADPCM at 32kbps

Calculate the memory required to store 100 hours of voice conversation if the coding is done using (a) PCM at 64kbps (b) ADPCM at 32kbps and (c) LPC at 2.4kbps.

If the music signal is band-limited to 15 kHz, what is the minimum sampling rate required? If 12 bits are used to represent each sample, what is the data rate?

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