Question: Question 4 (5%) The following 8-bit pixel sequence is to be encoded for transmission: 135 138 140 139 142 144 142 145 145 144 a.

Question 4 (5%) The following 8-bit pixel sequence is to be

Question 4 (5%) The following 8-bit pixel sequence is to be encoded for transmission: 135 138 140 139 142 144 142 145 145 144 a. How many bits will be required to transmit this sequence if Pulse Code Modulation (PCM) is used? (1 mark) b. If Differential Pulse Code Modulation (DPCM) encoding is used, what will be the complete DPCM sequence? (2 marks) c. Hence, calculate the number of bits required to transmit this DPCM sequence. (1 mark) d. What compression ratio is achieved by DPCM compared with PCM in this instance? (1 mark) Question 4 (5%) The following 8-bit pixel sequence is to be encoded for transmission: 135 138 140 139 142 144 142 145 145 144 a. How many bits will be required to transmit this sequence if Pulse Code Modulation (PCM) is used? (1 mark) b. If Differential Pulse Code Modulation (DPCM) encoding is used, what will be the complete DPCM sequence? (2 marks) c. Hence, calculate the number of bits required to transmit this DPCM sequence. (1 mark) d. What compression ratio is achieved by DPCM compared with PCM in this instance? (1 mark)

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