A New Reference Design Development Environment for JPEG 2000 Applications Bill Finch CAST, Inc. Warren Miller AVNET Design Services DesignCon 2003 January 28,2003

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 2 The Need for A New Standard Higher useful compression ratios to conserve bandwidth True loss less compression Faster processing of larger images Error resilience A single standard for all of the above

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 3 JPEG 2000 Advantages Better image quality at the same file size 25-35% smaller file sizes at comparable image quality Good image quality even at very high compression ratios, over 80:1 Low complexity option for devices with limited resources such as cell phones Scalable image files -- no decompression needed for reformatting Progressive rendering and transmission through a layered image file structure

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 4 Block Diagram of the JPEG 2000 Core

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 5 Considerations in Application Design Image size (s) to be processed Image composition (color, mono, grayscale) Throughput requirements Lossy vs. Loss less Target technology ASIC or FPGA Memory

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 6 Trade –Offs in a Design Speed vs. Area (and Memory) Standard allows for code-blocks to be entropy-coded/ decoded separately. So, parallel entropy coding engines can be employed to increase speed. This comes of course at the cost of extra memory and area Speed vs. Optimal Bit Rate Control The time spend in entropy coding can be reduced if less data are fed for entropy coding. This can be achieved by using higher quantization values. However, the bigger the quantization values the less optimization can be done by the bit-rate control algorithm

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 7 Trade-Offs in a Design, cont. Programmability vs. Area Hardwiring the DWT-filter type (5/3 or 9/7), the quantization tables, and the entropy coding switches can help to reduce the area requirements Error resilience vs. Compression efficiency Error resilience mechanisms introduce small overheads in the final stream size

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 8 The Need for a Reference Design Allows for the developer to learn to manage the trade offs in a known design Allows the developer to experiment with his/her own data Allows the developer to identify the hardware/software structure of an optimal design

DesignCon 2003 JPEG 2000 Reference Design Environment Slide 9 Why the Avnet Avalon Board It offers a large, high performance FPGA with sufficient internal memory It offers plenty of external memory expansion for non time critical buffering It offers a fast host interface Options for future expansion