Call signalling protocols and media stream packetization for packet based multimedia communications systems 基于包的多媒体通信系统上的呼叫信令协议及媒体流打包技术
With internet growing more and more fast and getting widely used , packetization based on ip has become the main trend of the evolution of telecommunication networks , and voip technology is being developed very rapidly 互联网速度越来越快,覆盖范围越来越广,以ip为核心的分组化已成为电信网络演进的主流方向, voip技术正在经历前所未有的迅速发展。
Then it puts forward an end - to - end transport architecture based on rtp for mpeg - 4 video streaming over the internet and studies the playload type and packetization algorithm of mpeg - 4 video bit - streams to achieve both efficiency and robustness for internet mpeg - 4 video 然后提出了基于rtp的mpeg - 4视频传输模型,研究适合于mpeg - 4视频传输的rtp载荷格式及组包算法,使传输同时具有高效性和丢包的鲁棒性。
The main contributions of the thesis are : ( 1 ) we present an end - to - end transport architecture using the rtp / udp / ip protocol stack and employ an efficient and robust packetization algorithm for mpeg - 4 video bit - streams at the sync layer for internet transport . ( 2 ) we study the congestion control mechanism based on aimd algorithm , and make improvement in order to reduce the oscillation of transimition rate due to tremendous contrast of packet loss ratio caused by dynamical change of the network load 论文的主要贡献在于:提出了基于rtp的mpeg - 4视频传输模型并充分利用mpeg - 4的videoobjectplane ( vop )特性,采用适用于mpeg - 4视频传输的rw载荷格式及组包算法,同时具有传输的高效性和丢包的鲁棒性。
This article take the contract management module in this system as an example , well described the system design and the process of development . the contract management module take the contract as a core , realized the function which people can add , change and delete information of the personnel , the device , the packetization , the material , the contract information that related to contracts , and users can inquire about related content according to respective permission 本文以该系统中的合同管理模块为例,详细描述了系统的设计和开发过程。合同管理模块以合同为中心,实现了与合同相关的人员、设备、分包、材料、合同概况等信息的添加、修改和删除功能,并可以根据各自的权限,查询相关的内容。
Its low memory requirement and flexible algorithms in complexity are particularly suited for real - time implementation . the third technique is odd and even packetization suited for real - time implement in internet . if odd and even packetization technique cooperate with error concealment and error tracking , the video will achieve good vision quality 此外,如果将一帧数据的奇序号gob和偶序号gob分别放入不同的数据包(奇包与偶包)在基于ip的网络上传输,即使发生丢包的情况,重建数据也能获得较好的视觉效果。
Ip voice gateway is a node between the communication control unit and the server of trunking system in trunking system network . its duty is digital compress coding and packetization of the voice in trunking system . it located on the edge of the network and accessed the trunking system into ip network from the kernel network angle 语音网关作为集群通信系统ip联网的关键设备,它处于集群系统话路控制单元和集群系统服务器之间,起着语音压缩、分组传输的重要作用;从网络的角度来看,它处于ip网络和集群无线通信系统之间,把集群通信系统接入ip网络。