7. Consider the following 8x8 image block x. You are required to encode the block using JPEG baseline algorithm. [120 138 143 126 132150 169 144; 110 143 111 131 143 166 144 130 101 124 127 117 127 124 122 131 110 144 138 121 160 163 117 123 119 140 145 173 183 165 131 116; 121 142 157 176 186 180 142 125 134 131 143 163 172 167 139 129 135 142 152 163 175 153 137 148] (a) (b) (c) (d) (e) (f) Calculate the 2-D DCT of (r-128) Quantize the DCT coefficients using the default luminance quantization table and a quality factor of 10 Encode the bit stream using the Run-length+Huffman Tables provided in the course notes. Assume that the DC coefficient of the previous 8x8 block is 5 Calculate the compression ratio achieved using JPEG compression. Dequantize the coefficients and reconstruct the image block i. Calculate the SNR of the block Comment on the compression efficiency of the JPEG compression. 7. Consider the following 8x8 image block x. You are required to encode the block using JPEG baseline algorithm. [120 138 143 126 132150 169 144; 110 143 111 131 143 166 144 130 101 124 127 117 127 124 122 131 110 144 138 121 160 163 117 123 119 140 145 173 183 165 131 116; 121 142 157 176 186 180 142 125 134 131 143 163 172 167 139 129 135 142 152 163 175 153 137 148] (a) (b) (c) (d) (e) (f) Calculate the 2-D DCT of (r-128) Quantize the DCT coefficients using the default luminance quantization table and a quality factor of 10 Encode the bit stream using the Run-length+Huffman Tables provided in the course notes. Assume that the DC coefficient of the previous 8x8 block is 5 Calculate the compression ratio achieved using JPEG compression. Dequantize the coefficients and reconstruct the image block i. Calculate the SNR of the block Comment on the compression efficiency of the JPEG compression