摘要
在视频数字解码系统中,需要将AD采样后形成的数字视频流传送到计算机,以便进行模拟解码等算法设计;文章提供了一种FPGA视频信号采集系统数字视频流传输方案,利用FPGA芯片提供的IP核和内嵌的PowerPC 405硬核以及USB2.0芯片CY7C67300实现了数字视频流的USB传输方式;文章介绍了USB芯片的固件开发,针对于系统的特定应用对USB接口的功能进行了定制,建立起PowerPC 405与USB控制器之间的数据通道,将存储在DDR SDRAM中的数字视频流传给USB控制器,并最终通过USB接口传输给PC机;实现了数字视频流的USB传输。
In video digital decoding system the digital video stream should be delivered to PC for software--decoding. This disquisition of- fers a transmission scheme of the digital video stream which is from the video sampling system based on FPGA. The article implements the USB transmission of the digital video with the IP cores supplied by Xilinx FPGA , embedded PowerPC 405 hardcore and the USB 2.0 control- ler CY7C67300. The paper introduces the USB firmware development and customizes the USB interface＇s function according to the given application. Also the article establishes a data way between PowerPC 405 and CY7C67300 which will transmit the digital video stream to the USB controller, then to PC, finally realizes the USB transmission of Digital Video Stream.
出处
《计算机测量与控制》
CSCD
2008年第5期725-726,733,共3页
Computer Measurement &Control
关键词
数字视频流
USB固件
HPI
测试并置位
digital video stream
USB firmware
host peripheral interface
test--and--set
