车载多媒体系统与内容推荐研究

发布时间：2018-01-24 22:23

本文关键词： 分布式组网方案推荐算法协同过滤车载多媒体　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国高速铁路的普及,越来越多的用户选择高铁出行。在旅途中乘客对多媒体服务拥有广泛需求,而当前还缺少成熟的模式来为用户在高铁这种特殊场景下提供多媒体服务,这和高铁的特殊性有很大关系。首先高铁列车是全封闭车厢,信号的屏蔽效应很强,无法通过单点无线AP来覆盖整个列车的所有车厢;其次列车出厂后因为安全性的原因不允许进行改装,所以对已出厂列车而无法进行有线方式的布网。本课题研究组和相关领域公司合作,根据高铁列车特殊性进行了深入探讨,提出了通过无线串联的方式,实现各个车厢分布式的组网,设计实现了分布式车载多媒体运维系统。此系统主要分为三大模块:影音系统模块、内容推荐模块和运行维护模块。对于实现影音系统,作者首先分析了当前实现流媒体技术的主要方案,选择了效费比最高的方案进行了实际开发。影音系统模块是通过XAMPP服务包,HTML5,JAVASCRIPT,CSS技术和HTTP协议等,来实现客户端的影音播放功能;运行维护模块通过JAVA技术和SOCKET通信,来实现多个分布服务器间的信息传递、系统维护功能;内容推荐模块依托于影音系统模块和运行维护模块提供的基础数据与功能,通过协同过滤推荐算法,实现了根据用户历史浏览数据,为用户推荐喜爱的节目内容的功能,同时作者根据场景的特殊性,优化了推荐算法,提高了推荐系统在用户数据稀疏、用户对影片评分过少的情况下的准确性,为用户提供了更优的服务。
[Abstract]:With the popularity of high-speed railway in China, more and more users choose high-speed rail to travel. During the journey, passengers have extensive demand for multimedia services. At present, there is still a lack of mature mode to provide multimedia services for users under the special circumstances of high-speed rail, which has a lot to do with the particularity of high-speed rail. First of all, the high-speed train is completely closed, and the signal shielding effect is very strong. Unable to cover all compartments of the entire train through a single wireless AP; Secondly, due to the safety reasons, the train is not allowed to be modified, so the train can not be wired distribution mode. This research group and related field companies cooperate. According to the particularity of high-speed train, the paper puts forward the method of wireless series to realize the distributed network of each carriage. The distributed vehicle multimedia operation and maintenance system is designed and implemented. The system is divided into three modules: audio and video system module, content recommendation module and operation maintenance module. Firstly, the author analyzes the main scheme of implementing streaming media technology, and chooses the scheme with the highest efficiency and cost ratio to carry on the actual development. The video and audio system module is based on the XAMPP service package HTML5. Java ASCRIPTU CSS technology and HTTP protocol, to achieve the client audio and video play function; The operation and maintenance module realizes the information transfer and system maintenance function between multiple distributed servers through JAVA technology and SOCKET communication. The content recommendation module is based on the basic data and functions provided by the audio and video system module and the operation and maintenance module, and realizes browsing data according to the user history through collaborative filtering recommendation algorithm. At the same time, the author optimizes the recommendation algorithm according to the particularity of the scene, and improves the accuracy of the recommendation system in the case of sparse user data and low rating of the film. To provide users with better service.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U463.6;TP311.52

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