1. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Slide 1 Color space transformation Phase 2 24.11.2011 Institute MD, University of Rostock

2. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Origin (Old Design): Frequency: 38.109 MHz Area (LUT FF pairs): 3641 Slide 2 Mandatory values for FGPA Area A (# of pairs)3641 Frequency f38.109 MHz # of cycles N cycles 41372 Operation time t OP 1085.622 µs E avg 0.51172 Metric1928.48 s

3. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Improvents to do 1.Decrease Error 2.Decrease Size 3.Increase Speed Slide 3

4. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Improvents to do 1.Decrease Error  Round, coefficient correction 2.Decrease Size 3.Increase Speed Slide 4

5. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Improvents to do 1.Decrease Error  Round, coefficient correction 2.Decrease Size 3.Increase Speed Slide 5 Optimize Multiplier

6. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Error Decresing Previous: Output signal just been cut off to match output witdth Example: …0101100|110010…  …0101100110010…  Error 0,78125 Solution: Check first cut-off bit, if it is ‘1’ add ‘1’ to output signal …0101100|110010…  …0101101110010…  Error 0,21875 coefficient correction: coefficient cb(2) and cr (0) which are both b"001111_11111111_11111111" should be actually b"000000_00000000_00000000“  New average error: 0.249936 Slide 6

7. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock A better multiplier Using of an array multiplier Add partial products with single FAs insteads full width adders  shorter critical path Slide 7

8. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Further Improvements Due to coefficient correction: Save of a multiplier in CB and CR: multiplication with 2^x means shifting Adding two pipeline steps Slide 8

9. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Example: Cb-Computation 2 Multipliers 3 Adders 2 Two’s Complements Slide 9 Mult1 Mult2 Shift Coeff_0 Pixel_in_r Coeff_1 Pixel_in_g Pixel_in_b NOT add1 add2 Offset increased by 2 add3 Cb-Component REG 1REG 1 REG 2REG 2 CLK Rst Round

10. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Result of improvements/New Metric Frequency: 75.477 MHz Area (LUT FF pairs): 1312 Slide 10 Mandatory values for FGPA Area A (# of pairs)1312 Frequency f75.477 MHz # of cycles N cycles 41374 Operation time t OP 548.167 µs E avg 0.249936 Metric14.73 s

11. Institute of Applied Microelectronics and Computer Engineering College of Computer Science and Electrical Engineering, University of Rostock Thank you for your attention! Slide 11