Assignment 3 Presentation

1. Assignment 3 Presentation Shin-Fu Wu 2013/12

2. Start Pre-processing VQ SORT Bit Rate Error Decode FILL End

3. Start SORT Sort Codebook by Average VQ avg • We use the average of a block to present its characteristics. • The basic idea is that similar blocks tend to have similar averages. Bubble Sort Find Minimal Class Similar block Similar average End SORT

4. Bit Rate Error = 0% Original VQ PSNR = 30.2391 Sorted Codebook PSNR = 30.1759

5. Bit Rate Error = 1% Original VQ PSNR = 22.4261 Sorted Codebook PSNR = 25.4679

6. Bit Rate Error = 5% Original VQ PSNR = 16.3195 Sorted Codebook PSNR = 20.375

7. Bit Rate Error = 10% Original VQ PSNR = 14.178 Sorted Codebook PSNR = 17.9997

8. Bit Rate Error = 15% Original VQ PSNR = 13.1293 Sorted Codebook PSNR = 16.5412

10. Start Post-processing VQ SORT Bit Rate Error Decode FILL End

11. Start FILL Detect Block Error by Average Block avg • We detect the error block by average and fill the error block by sorted codebook. codebook Detect by 5-avg 5-avg block dif>128 block block block Fill by 4-avg block 4-avg End FILL