实时多模式无线视频传输原型系统的实现

给出了一种新颖的无线视频传输原型系统。其设计特点是,无线终端以高性能多媒体DSP作为实时视频压缩编码和系统控制的核心,接口板集成了多种现有的无线网络接口,通过软件控制,系统不仅可以工作在单个网络模式,也可在多种网络模式下自动选择合适的传输方式,提供最佳的视频传输质量。详细描述了系统的组成结构,无线终端的软硬件设计和控制策略。实际测试结果表明,该系统在GPRS/WLAN和CDMA/WLAN的网络组合测试环境下,均能在各种网络模式之间正确切换,图像质量令人满意。

Implementation of a prototype real-time multi-mode wireless video transmission system

A novel prototype wireless video transmission system was presented.The characteristic of the design was that the wireless terminal used high performance multimedia DSP as video processing and control core,and the interface board integrates various wireless network interfaces.By software control,not only the system could work in single net-work mode,but also could select appropriate transmission channel in multi-mode network environment,so as to present best video quality.The system configuration,hardware and software design,as well as the control policy of the wireless terminal were described in details.Experiments show that in the GPRS/WLAN and CDMA/WLAN test conditions,the system can select the proper network and present satisfactory reconstructed video.