英语翻译content adaptation for multimedia messaging services has occurred in terms of picture and voice.However,the development of modern wireless networks demands media applications,such as video,and therefore video adaptation.there are several

英语翻译content adaptation for multimedia messaging services has occurred in terms of picture and voice.However,the development of modern wireless networks demands media applications,such as video,and therefore video adaptation.there are several
英语翻译
content adaptation for multimedia messaging services has occurred in terms of picture and voice.However,the development of modern wireless networks demands media applications,such as video,and therefore video adaptation.there are several IMS scenarios that would require video adaptation:for video messaging;for video portals;for video telephony;and for video group communication.
Many forms of adaptation already exist in communication systems to address various problems that might arise in these scenarios.Most notable is the wireless link-layer adaptation for wireless communications to improve throughput.Our transcoding solution can be considered the adaptation in the application layer.As we shall discuss later,this transcoding is needed for video applications to respond to changing throughput caused by link-layar adaptation,and to bridge other forms of diversity.there are many reasons media adaptation is necessary.First,the diversity of network types that IMS supports requires malleable media content to fit network pipes of different bandwidth.second,the common use of portable terminals requires compalibility with the drastically different processing power and display screen sizes.Third,the existence of a large number of video compression standards and the lack of a common baseline standard mean terminals might support mutually incompatible video formats.Media adaptation is a technique that addresses these differences.Transcoding techniques for these conventional purposes are important and well researched.In addition to differences that require media adaptation,mobile applications also present three unique challenges.Mobile applications require increasing interactivity between the service provider and the end user .Mobile communication mostly occurs through error-prone and lossy channels.Mobile terminals often have power constraints.In this article,we discuss how the same transcoder can,with dynamic feedback,achieve the conventional media adaptation goals as well as address these three important mobile communication challenges.

英语翻译content adaptation for multimedia messaging services has occurred in terms of picture and voice.However,the development of modern wireless networks demands media applications,such as video,and therefore video adaptation.there are several
内容改编的多媒体信息服务方面发生的图片和voice.However ,发展现代无线网络要求媒体应用,如视频,因此视频adaptation.there有几个IMS的情况下,将需要视频适应：支持视频信息;视频门户,视频电话和视频组通讯.
许多形式的适应已经存在的通信系统,以解决各种可能出现的问题,在这些scenarios.Most值得注意的是无线链路层适应无线通信,以改善throughput.Our转换解决方案可以被认为是适应中的应用layer.As我们将讨论后,这个转换是视频应用的需要,以应对不断变化的吞吐量造成的链接拉亚适应,并缩小其他形式的diversity.there的原因是多方面的媒体适应necessary.First ,多样性的网络类型的IMS支持要求可塑性的媒体内容,以适应不同的网络管道bandwidth.second ,共同使用便携式终端需要compalibility大大不同的处理能力和显示屏sizes.Third ,存在大量的视频压缩标准,以及缺乏一个共同的基线标准意味着终端可以支持相互不兼容的视频formats.Media适应技术,是解决这些differences.Transcoding这些常规技术的目的是重要的,以及researched.In除了媒体的分歧,需要适应,移动应用软件也存在三个独特的挑战.移动应用的需要不断增加之间的互动服务供应商和最终用户.移动通信主要是通过易错和有损channels.Mobile终端往往有权力constraints.In本文中,我们将讨论如何能在同一转换,动态反馈,实现传统媒体适应目标以及解决这三个重要的移动通信的挑战.