HD-SDI视频嵌入式图像采集系统设计

Design of Image Acquisition System for HD-SDI Video 

摘要:

为了满足光电测量系统中以HD-SDI接口的数字相机的视频图像处理需求,提出了基于HD-SDI接口的嵌入式图像采集系统解决方案;应用FPGA与TI公司的解码芯片将HD-SDI数字视频的串行数据转换成为并行的图像数据以满足DSP等处理器输入需要;利用FPGA外部扩展一定容量的存储单元来缓冲和重组图像数据,并以特定顺序发送给DSP;图像数据通过DSP的EMIF接口以DMA方式存入DSP内存,从而实现对HD-SDI视频的图像数据采集;系统集成HD-SDI数据链路均衡、解码以及数据采集功能,为DSP的后续图像处理提供了可以无缝连接的数据源。

Abstract:

In order to meet the requirement of the video image processing for the digital camera with HD-SDI interface in electro-optical measuring system, an embedded image acquisition system based on HD-SDI interface is proposed. Combining with FPGA and the deserializer chip of TI Company implement conversion of serial data in HD-SDI format to a parallel image data to meet the needs of DSP and other processor input. FPGA extended peripheral memory to store and reorganize the image data and sent to DSP in a specific order. Image data is stored in DSP memory through DSP EMIF interface in DMA way, which realized the image data acquisition function to HD-SDI video. The system integrated HD-SDI data link equalization, decoding and data acquisition function, provided a glueless connection data source to DSP for further image processing.