Over the past years, we have witnessed an explosive growth in the use of multimedia applications such as audio and video streaming with mobile and static devices. Multimedia streaming applications need new approaches ...Over the past years, we have witnessed an explosive growth in the use of multimedia applications such as audio and video streaming with mobile and static devices. Multimedia streaming applications need new approaches to multimedia transmissions to meet the growing volume demand and quality expectations of multimedia traffic. This paper studies network coding which is a promising paradigm that has the potential to improve the performance of networks for multimedia streaming applications in terms of packet delivery ratio (PDR), latency and jitter. This paper examines several network coding protocols for ad hoc wireless mesh networks and compares their performance on multimedia streaming applications with optimized broadcast protocols, e.g., BCast, Simplified Multicast Forwarding (SMF), and Partial Dominant Pruning (PDP). The results show that the performance increases significantly with the Random Linear Network Coding (RLNC) scheme.展开更多
网际互连协议(Internet Protocol,IP)化技术凭借高带宽和灵活性等优势,为广播电视传输系统带来了新的可能,特别是在广播电视基带架构层,IP化音频(Audio over IP,AoIP)技术可以发挥重要作用,完成从源信号采集到发射的全过程音视频传输任...网际互连协议(Internet Protocol,IP)化技术凭借高带宽和灵活性等优势,为广播电视传输系统带来了新的可能,特别是在广播电视基带架构层,IP化音频(Audio over IP,AoIP)技术可以发挥重要作用,完成从源信号采集到发射的全过程音视频传输任务。基于此,介绍AoIP的相关概念、标准和应用优势,阐述基带架构的组成层次、采集编码和自动化功能,分析其技术特点。在此基础上,详细探讨AoIP技术在基带系统各层面的应用情况,包括AoIP网络部署、音视频流处理、自动化实现和同步方案等,并说明不同应用的效果。展开更多
网际互连协议(Internet Protocol,IP)化网络作为一种新兴的传输技术,正在改变传统的电视制作和播出模式。基于此,概述了IP化技术的相关概念,分析了IP化技术的数字编码和分组传输机制,阐述了IP化技术在推动电视制播融合方面的作用,提出...网际互连协议(Internet Protocol,IP)化网络作为一种新兴的传输技术,正在改变传统的电视制作和播出模式。基于此,概述了IP化技术的相关概念,分析了IP化技术的数字编码和分组传输机制,阐述了IP化技术在推动电视制播融合方面的作用,提出了电视制播IP化网络的分层架构,解析了IP化核心网和接入网的组成,以及软件定义网络(Software Defined Network,SDN)在IP化网络中的控制作用。展开更多
文摘Over the past years, we have witnessed an explosive growth in the use of multimedia applications such as audio and video streaming with mobile and static devices. Multimedia streaming applications need new approaches to multimedia transmissions to meet the growing volume demand and quality expectations of multimedia traffic. This paper studies network coding which is a promising paradigm that has the potential to improve the performance of networks for multimedia streaming applications in terms of packet delivery ratio (PDR), latency and jitter. This paper examines several network coding protocols for ad hoc wireless mesh networks and compares their performance on multimedia streaming applications with optimized broadcast protocols, e.g., BCast, Simplified Multicast Forwarding (SMF), and Partial Dominant Pruning (PDP). The results show that the performance increases significantly with the Random Linear Network Coding (RLNC) scheme.
文摘网际互连协议(Internet Protocol,IP)化技术凭借高带宽和灵活性等优势,为广播电视传输系统带来了新的可能,特别是在广播电视基带架构层,IP化音频(Audio over IP,AoIP)技术可以发挥重要作用,完成从源信号采集到发射的全过程音视频传输任务。基于此,介绍AoIP的相关概念、标准和应用优势,阐述基带架构的组成层次、采集编码和自动化功能,分析其技术特点。在此基础上,详细探讨AoIP技术在基带系统各层面的应用情况,包括AoIP网络部署、音视频流处理、自动化实现和同步方案等,并说明不同应用的效果。
文摘网际互连协议(Internet Protocol,IP)化网络作为一种新兴的传输技术,正在改变传统的电视制作和播出模式。基于此,概述了IP化技术的相关概念,分析了IP化技术的数字编码和分组传输机制,阐述了IP化技术在推动电视制播融合方面的作用,提出了电视制播IP化网络的分层架构,解析了IP化核心网和接入网的组成,以及软件定义网络(Software Defined Network,SDN)在IP化网络中的控制作用。
