用TMS320C50DSP实现图像的直接捕获与显示  

Direet video acquisition and displaying by TMS320C50 DSP

作　　者：国澄明[1] 李铁盘[2] 

机构地区：[1]天津大学电子工程系 [2]河南教育学院

出　　处：《信号处理》1996年第1期87-92,共6页Journal of Signal Processing

摘　　要：大多数视频捕获系统都要有专门的控制电路，用来把来自视频模／数转换器（ADC）的数据传输给系统存储器或把数据由系统存储器传输给视频数／模转换器（DAC）．这个控制电路是复杂的．本文说明了数字信号处理器（DSP）如何能简化视频捕获和显示系统的设计，这是靠DSP由ADC读取数据写入系统存储器或由存储器读取数据写入DAC来实现的．本文给出了使用TMS320C50DSP实现这样的系统的例子。C50最高可运行在28．6MHZ上，可以做到每行捕获1485个采样．当系统以低分辨捕获和显示视频时可以做到边捕获边显示，边捕获边处理或边显示边处理，可以解决许多技术问题．almost any video grabber system has a special controller circuit to transfer data from the videoanalg to digital converter (ADC) to the system memory or from the system memory to digital to video analogconverter (DAC). This controller is normally complex.This paper shows how a digital signal processor (DSP) can simplify the video acquisition and displaying system by reading the video ADC and writing to its memory or reading data from its memory and writing to thevideo DAC.An example is given with the TMS320C50 processor. C50, running at as fast as 28.6MHZ, can acquire upto 1485 samples per line. In the low resolution case, it is possible to acquire while displaying, to asquire whileprocessing or to display while processing. This feature can be used to resolve many technical matters.

关 键 词：DSP 图像捕获 图像显示 图像处理 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]