1. 2D DCT in ARM-based JPEG Processor
第 2 and 3 組
R 林耿賢
R 李源華
R 林政廷
R 鍾慶諺
P 陳宗裕
2018/12/1

2. Outline Block of ARM-based JPEG Processor JPEG Software Demo
Benchmark of JPEG Software
Why use hardware 2D DCT?
Algorithm of Row-Column decomposition 2D DCT.
Matlab Demo of this Algorithm
Comparison
Reference
2018/12/1

3. Block of 2D DCT in ARM-based JPEG Processor
ARM7TDMI
Run(uC/OSII, JPEG Encoder ..)
DRAM
ARM semi-Hoster
AHB
AHB
CMOS Sensor
Wrapper
2018/12/1

4. COMS Sensor AHB Wrapper –1
2018/12/1

5. COMS Sensor AHB Wrapper –2
Large scale of COMS Sensor AHB Wrapper
2018/12/1

6. JPEG ARM Software Demo
2018/12/1

7. JPEG Software Demo 1 Peppers.bmp Peppers.jpg 2018/12/1
ARM JPEG Encoder
Peppers.bmp
Peppers.jpg
2018/12/1

8. JPEG Software Demo 2 Mandrill.bmp Mandrill.jpg 2018/12/1
ARM JPEG Encoder
Mandrill.bmp
Mandrill.jpg
2018/12/1

9. Benchmark of the ARM JPEG Software
DCT
Quant.
VLC
Cycles
5000
3000
=11,000 clocks
If ARM operates at 50MHz,
=> almost 0.22m Sec. for JPEG Encode
2018/12/1

10. Product of DSC 1
SunPlus – GT8980 [1]
2018/12/1

11. Product DSC 2
TMS320DSC25 [2]
2018/12/1

12. Block of 2D DCT in ARM-based JPEG Processor
ARM7TDMI
Run(uC/OSII, JPEG Encoder ..)
DRAM
ARM semi-Hoster
AHB
AHB
CMOS Sensor
Wrapper
2D DCT
2018/12/1

13. Algorithm of 2D DCT
2018/12/1

14. Row-Column decomposition (RCD) method [3]
2018/12/1

15. The original 1D DCT
2018/12/1

16. Algorithm of 1D DCT 1
2018/12/1

17. Algorithm of 1D DCT 2
Where
2018/12/1

18. Algorithm of 1D DCT 3
2018/12/1

19. Algorithm of 1D DCT 4
2018/12/1

20. Algorithm of 1D DCT 5
2018/12/1

21. Algorithm of 1D DCT 6
2018/12/1

22. Architecture Design for Proposed Transposition Memory 1
2018/12/1

23. Architecture Design for Proposed Transposition Memory 2
2018/12/1

24. Row-Column Decomposition 2D-DCT –1
2018/12/1

25. Row-Column Decomposition 2D-DCT –2
2018/12/1

26. Row-Column Decomposition 2D-DCT –3
2018/12/1

27. Matlab Demo of 2D DCT
Our Algorithm
2018/12/1

28. Comparison
1D DCT
Compare with software
2018/12/1

29. Conclusion We try to implement a DSC rapid prototype in ARM-based SOC.
The JPEG En/De-coder is the key part in DSC.
We will try to implement the all JPEG in Hardware.
2018/12/1

30. Reference [1]. www.gtsc.com.tw/products/gt-8920.
[2].
[3]. N, Ahmed, T. Natarajan, and K. R. Rao, “Discrete cosine transform,” IEEE Trans.on Computers, vol. C-23, pp , Jan
N. Cho and S. Lee “Fast algorithm and implementation of 2D discrete cosine transform,” IEEE Trans. Circuits and Systems, vol. 38, pp , Mar
JPEG still image data compression standard
2018/12/1

31. Thank you for your time!
2018/12/1