4DSP公司的VID475是JPEG2000压缩系统解决方案，它采用两块ADV212 CODEC器件以及两块Xilinx Virtex-4 FPGA器件和一些快速的板上SRAM和DRAM存储器。该解决方案采用Camera-Link标准，使它非常适合数字图像系统，广泛应用在数字影片的压缩和存储，卫星视频帧记录仪，高分辨率X射线记录仪，医疗扫描照相机，显微镜，移动图像设备，数字视频广播以及实时无损耗图像压缩等。本文介绍了VID475的主要特性，外形图以及它的方框图。
JPEG2000 hardware compression system solution VID475
DeSCRJPTion
The VID475 features a JPEG2000 hardware compression solution. It is based on the ADV212 codec devices suitable for on-the-fly compression prior or after the imaging processing implemented on the Virtex-4 FPGA device. The VID475 has two Xilinx Virtex-4 FPGA devices and some fast on-board SRAM and DRAM memory resources. It is the most efficient hardware compression solution available with embedded processing power. The flexibility of the architecture and the use of the Camera-Link standard makes this solution universal for digital imaging systems.
主要特性：
JPEG 2000 compression with two ADV212 CODEC devices
Camera-Link Base configuration via two mini CL connectors
FPGA
High speed DSP processing in two Xilinx Virtex-4 ® FPGA
XC4VSX55, XC4VLX40, XC4VLX60, XC4VLX80, XC4VLX100 or XC4VLX160
XC4VFX20 or XC4VFX60 with embedded PowerPC RISC processor
FPGA configuration on-board storage
Off-the-shelf IP cores for real time compression (JPEG2000, edge detection)
FPGA firmware design services available upon request
Memory
2 x 32M x 16 DDR2 SDRAM (128MB)
4 x 2M x 32 QDR2 SRAM devices (32MB)
128Mbit flash device
PCI interface
PCI-X 64-bit 133MHz, 3.3V
PCI-X/PCI 64/32-bit 66MHz, 3.3V
PCI 64/32-bit 33MHz, 3.3V
PCI express 4 lanes
PMC Pn4 64 I/O connected to FPGA A
Measured sustained bandwidth
64-bit 133MHz = 760Mbytes/s
64-bit 66MHz = 450Mbytes/s
32-bit 33MHz = 120Mbytes/s
Software Support
FPGA reference design
API, documentation and sample source code
Software utility to program on-board Flash with FPGA configuration data
Device driver for WINOOWs 2000/XP, Linux and VxWorks
Test /demonstration application
主要应用：
Digital film compression and storage
Satellite video frame recording instruments
High-definition X-ray frame recording
Medical line scan cameras
Microscopy, radiology and biopsy analysis
Mobile imagery instruments
Low-weight digital video broadcasting
Real-time loss-less imaging compression
图1. VID475 硬件压缩解决方案外形图
图2. VID475 硬件压缩解决方案方框图
本文关键字：解决方案 电工文摘，电工技术 - 电工文摘
