4. a) A Compact Disc Digital Video (VCD) records video signals digitally using PCM. The video baseband signal's bandwidt

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4 A A Compact Disc Digital Video Vcd Records Video Signals Digitally Using Pcm The Video Baseband Signal S Bandwidt 1 (51.8 KiB) Viewed 33 times

4. a) A Compact Disc Digital Video (VCD) records video signals digitally using PCM. The video baseband signal's bandwidth is 6 MHz. The signals are sampled at a rate 33 % higher the Nyquist rate. Calculate the minimum bandwidth required to encode and transmit the video signal when the Nyquist samples are uniformly quantized into 16.7 million levels. [8 marks] b) Given a binary Frequency Shift Keying (FSK) signal with a space frequency of 49 kHz, a mark frequency of 51 kHz and an input bit rate of 2 kbps. Compute the peak frequency deviation, carrier frequency and the bandwidth when roll off factor 0.6 is used in the modulation. [5 marks] c) Define dynamic range and quantization [4 marks) d) State two advantages and one disadvantage of Amplitude Shift Keying (ASK) [3 marks)