摘要
随着公路及铁路系统基础建设的不断扩展,长途客运及旅游业正飞速发展。为了提高客运服务标准,吸引更多客源,不少交通运营单位开始更换高级客车及旅客列车上旧式的车载影碟播放系统,改用功能更强大、互动性更强的视频点播系统。针对传统视频点播系统主要依靠视频服务器作为载体、系统性价比不高的问题,介绍了Altera SOPC平台上嵌入式多路视频点播系统的实现方案。通过Nios Ⅱ控制用户自定义模块以乒乓操作的方式实现对硬盘视频数据与两片内存间的DMA(直接存储器存取)传输,根据用户的指令,将分区存储的视频数据经解码后发送到相应用户终端,从而满足多路视频数据的并行点播。
With the constructions of highway and railway infrastructure, the development of transportation business and tourism is forging ahead. In order to enhance services and inspire more customers, many passenger-transport companies are replacing the old-fashioned disk players with more flexible VOD systems on their buses and trains. Focusing on the cost-effective problem, it introduces a scheme of implementation of the embedded multiplex VOD system based on Nios Ⅱ. The system uses custom logic module to implement high speed multiplex DMA in method of Ping-pang operation. In response of user ternainal, the decoded data is sent to the corresponding port , which satisfied the requirement of muhiway real-time play.
出处
《电子工程师》
2008年第1期10-12,29,共4页
Electronic Engineer
基金
湖北省教育厅重点研究项目(D200511002)
