Q2

. As you have seen in Block one, chapter five, Discrete Cosine transform (DCT), Requantization, Zig-Zag scanning and Run-length coding constitute four consecutive stages of the JPEG encoding process which is used in MPEG coding. Consider an MPEG encoder has a requantization matrix specified in matrix 1. If the output of the DCT block is that in matrix 2, what will be the output of the run- length coding considering that the coded DC term of the contiguous block is 110. Detail each step separately. Requantization Matrix 5 20 18 16 5 21 19 21 27 17 21 30 12 22 44 24 DCT output = 13 -2 700 4 -48 18 8 13 17 3 12 -5 -3 4 2 Consider that the output of the Thresholding phase of MPEG encoding is the following 4x4 matrix. What will be the final output after the zigzag scanning and run- length coding stages? Detail your answer. 21 1 0 0 -1 0 1 0 0 1 0 0 1 0 0 0