基于Blackfin DSP的实时视频采集接口设计与实现

Design and Implementation of A Real-Time Data Acquisition Interface Based on Blackfin DSP

针对ADI Blackfin 533 DSP,本文首先阐述该DSP和TI的视频解码芯片TVP5150构成的采集系统,然后讨论视频采集软件中数据的传输模式以及缓冲区参数选择问题,分析和试验表明,本系统能够以25fps速率实时采集D1(720×576)格式的视频数据,采集程序占用DSP开销小于0.02%,占用SDRAM传输带宽约10%,能满足实时视频编码应用的要求。

This paper describes a data acquisition system based on DSP and video codec（TVPS150）. The data transnfission mode and the buffer＇s parameters selection are discussed. The experimental results show that the sampling rate is up to 25fps of D1 （720＊576） at real-time, and the system can satisfy the video encoding applications.