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Design of a motion JPEG (M/JPEG) adapter card

机译:运动JPEG(M / JPEG)适配卡的设计

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摘要

Abstract: In this paper we describe a design of a high performance JPEG (Joint Photographic Experts Group) Micro Channel adapter card. The card, tested on a range of PS/2 platforms (models 50 to 95), can complete JPEG operations on a 640 by 240 pixel image within 1/60 of a second, thus enabling real-time capture and display of high quality digital video. The card accepts digital pixels for either a YUV 4:2:2 or an RGB 4:4:4 pixel bus and has been shown to handle up to 2.05 MBytes/second of compressed data. The compressed data is transmitted to a host memory area by Direct Memory Access operations. The card uses a single C-Cube's CL550 JPEG processor that complies with the baseline JPEG. We give broad descriptions of the hardware that controls the video interface, CL550, and the system interface. Some critical design points that enhance the overall performance of the M/JPEG systems are pointed out. The control of the adapter card is achieved by an interrupt driven software that runs under DOS. The software performs a variety of tasks that include change of color space (RGB or YUV), change of quantization and Huffman tables, odd and even field control and some diagnostic operations.!6
机译:摘要:在本文中,我们描述了一种高性能JPEG(联合图像专家组)微通道适配器卡的设计。该卡在多种PS / 2平台(型号50至95)上进行了测试,可以在1/60秒内完成640 x 240像素图像的JPEG操作,从而可以实时捕获和显示高质量的数字图像。视频。该卡可以接受YUV 4:2:2或RGB 4:4:4像素总线的数字像素,并已显示出每秒可处理2.05 MBytes的压缩数据。通过直接内存访问操作将压缩的数据传输到主机存储区域。该卡使用单个C-Cube的CL550 JPEG处理器,该处理器符合基准JPEG。我们对控制视频接口,CL550和系统接口的硬件进行了广泛的描述。指出了一些增强M / JPEG系统整体性能的关键设计要点。适配卡的控制是通过在DOS下运行的中断驱动软件来实现的。该软件执行各种任务,包括更改色彩空间(RGB或YUV),更改量化表和霍夫曼表,奇数和偶数场控制以及某些诊断操作。!6

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