20111ee114_1_hw7

# 20111ee114_1_hw7 - EE114 Winter 2011 Problem Set 7 Problem...

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EE114, Winter 2011 Problem Set 7 ________________________________________________________________________ Problem Set #7 Due: March 7, 2011 1) Assume we have an 8-pixel by 8-pixel block. After the DCT, it becomes the following matrix: 186 -18 15 -9 23 -9 -14 19 21 -34 26 -9 -11 11 14 7 -10 -24 -2 6 -18 3 -20 -1 -8 -5 14 -15 -8 -3 -3 8 -3 10 8 1 -11 18 18 15 4 -2 -18 8 8 -4 1 -7 9 1 -3 4 -1 -7 -1 -2 0 -8 -2 2 1 4 -6 0 Please quantize the matrix with the following quantizer matrix. 5 9 13 17 21 25 29 33 9 13 17 21 25 29 33 37 13 17 21 25 29 33 37 41 17 21 25 29 33 37 41 45 21 25 29 33 37 41 45 49 25 29 33 37 41 45 49 53 29 33 37 41 45 49 53 57 33 37 41 45 49 53 57 61 Note that this quantizer matrix is the quantizer matrix in Computer Assignment #6 with Quality factor 4 .

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EE114, Winter 2011 Problem Set 7 ________________________________________________________________________ 2) Reorder the quantized coefficient matrix according to the zig-zag order as shown below: 1 2 6 7 15 16 28 29 3 5 8 14 17 27 30 43 4 9 13 18 26 31 42 44
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20111ee114_1_hw7 - EE114 Winter 2011 Problem Set 7 Problem...

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