摘要
空间数据传输系统中,音、视频数据的传输变得越来越重要。由于音、视频传输对等时性和实时性要求高,并且视频数据的速率高,数据量大,传统的做法是为音、视频信息单独开辟一个信道传输,但这样会耗费大量的资源。而将视频、音频和异步数据混合复接传输,可以提高信道利用率。针对这种任务,利用国际空间数据系统咨询委员会(CCSDS)高级在轨系统(AOS)建议,提出了两级复用的方案和虚拟信道调度的算法,以满足视频、音频数据传输的等时性和异步数据传输的灵活性,并设计了演示系统。
The transmission of audio and video data becomes more and more important in the space data transmission system. Audio and video data need to be transmitted in high isochronous quality and real-time. The speed of video data is high, and the volume is great. Conventional method is to transmit audio and video information in a single channel, but that will waste much resource. Multiplexing audio, video and asynchronous data will improve the utilization ratio of the channel. CCSDS advanced orbiting systems （AOS） report is applied to this kind of task. Two-level multiplexing strategy and virtual channel schedule are suggested to satisfy the isochronous character of video, audio data transmission and the agility of asynchronous data transmission, and the demo system is designed to prove the blue print to be true.
出处
《计算机工程与设计》
CSCD
北大核心
2006年第19期3634-3637,共4页
Computer Engineering and Design
