摘要
The prime standard for audio/video transport in IP networks is the Real-time Transport Protocol （RTP） and it is targeted at useful services for the transport of real-time multimedia data. RTP was originally designed for use in multicast conferences, using the lightweight sessions model. RTP （in particular, the data part） is so tightly coupled to the application that a number of people have developed libraries that implement RTP. However, little is known about the RTP overheads between user area and kernel area within operating systenl. Actually, unnecessary copying between user area and kernel area lowers the system efficiency. In this paper, we present the design and implementation of Enhanced Multimedia Input/Output Scheme based on LINUX. We brought focus to the crossover architecture supporting RTP. Our contributions are able to be summarized into two components： 1） Enhanced Input/Output （EIO） scheme based on LINUX improves the transmission speed by reducing the overheads generated from data copy and context switch between user area and kernel area. And this enables server-based system to transport multimedia data more efficiently. 2） Furthermore, Enhanced Input/Output scheme with RTP （EIORTP） scheme supports efficient multimedia data transmission architecture. The two schemes improve the performance of massive multimedia data transmission.
The prime standard for audio/video transport in IP networks is the Real-time Transport Protocol （RTP） and it is targeted at useful services for the transport of real-time multimedia data. RTP was originally designed for use in multicast conferences, using the lightweight sessions model. RTP （in particular, the data part） is so tightly coupled to the application that a number of people have developed libraries that implement RTP. However, little is known about the RTP overheads between user area and kernel area within operating systenl. Actually, unnecessary copying between user area and kernel area lowers the system efficiency. In this paper, we present the design and implementation of Enhanced Multimedia Input/Output Scheme based on LINUX. We brought focus to the crossover architecture supporting RTP. Our contributions are able to be summarized into two components： 1） Enhanced Input/Output （EIO） scheme based on LINUX improves the transmission speed by reducing the overheads generated from data copy and context switch between user area and kernel area. And this enables server-based system to transport multimedia data more efficiently. 2） Furthermore, Enhanced Input/Output scheme with RTP （EIORTP） scheme supports efficient multimedia data transmission architecture. The two schemes improve the performance of massive multimedia data transmission.
