高速多媒体桌域网的结构体系技术研究

桌域网是一种适合于多媒体业务传输的小型高速网络。本文论述高速多媒体桌域网的概念,结构体系和主机接口。在介绍桌域网的设计目标和特性之后着重分析桌域网的结构体系和两种主机接口的特点,并给出其应用前景。     

基于Android平台的智能手持终端Camera模组驱动设计与研究

为了实现多媒体数据采集和处理的需求,提出了一种基于android平台和V4L2视频采集接口的camera驱动设计方案,并完成了软件设计。实际应用表明,该驱动架构设计实现了数据和控制通信的通用性、标准化,同时方便设备管理,达到了设计要求。     

基于客户机／服务器结构的多媒体合著平台设计

本文全面介绍了一个基于客户机／服务器结构的多媒体合著平台，作者将面向对象技术应用于模型设计与实现，基于会议模型支持合著活动的组织，采用多媒体著作模型ＷＮＣＨ表示多媒体信息的集成，基于客户机／服务器结构完成共享信息管理，该合著平台直接支持了多作者进行多媒体作品合著过程及其合作作品的管理。     

基于云架构的多媒体集成系统设计

为实现企业/个人多媒体系统的一体化融合,提出了基于云架构的多媒体集成系统设计。系统设计采用当前广泛应用的有线/无线网络,实现了企业及个人数字设备的智能集成与综合应用。在系统架构与设计的基础上,进一步针对无线覆盖、虚拟存储体系及远程控制等系统关键应用进行了详细设计,对增加系统的易用性、可扩展性,进而推动多媒体系统的普及应用具有重要意义。     

基于SIP的多媒体会议分布式管理架构的设计

与会者及设备在地理上多处分布的大规模多媒体会议系统的一个重要设计思想就是要提高会议管理架构的可伸缩性.文章介绍了基于会话初始协议(SIP)的多媒体会议分布式管理架构的设计,并将策略管理技术引入到分布式管理架构中,从而为解决会议系统的缩放性、扩展性问题提供了一种新途径.     

The Circuits and Robust Design Methodology of the Massively Parallel Processor Based on the Matrix Architecture

Novel circuits and design methodology of the massively parallel processor based on the matrix architecture are introduced. A fine-grained processing elements (PE) circuit for high-throughput MAC operations based on the Booth's algorithm enhances the performance of a 16-bit fixed-point signed MAC, which operates up to 30.0GOPS/W. The dedicated I/O interface circuits are designed for converting the direction of data access and supporting the interleaved memory architecture, and they are implemented for maximizing the processor core efficiency. Power management techniques for suppressing current peaks and reducing average power consumption are proposed to enhance the robustness of the macro. The circuits and the design methodology proposal in this paper are attractive for achieving a high performance and robust massively parallel SIMD processor core employed in multimedia SoCs     

Remultiplexing Eureka-147 Ensemble With MPEG-2 TS for T-DMB Multimedia Service

This paper introduces a layered structure of the Korean terrestrial digital multimedia broadcasting (T-DMB) ensemble based on Eureka-147 and suggests a new transmission architecture for flexible T-DMB service. In the suggested transmission architecture, MPEG-2 transport stream (TS) for T-DMB multimedia service is inserted into the ensemble distributed via the ensemble transport interface (ETI). Thus, we propose a novel algorithm remultiplexing the ETI with MPEG-2 TS. The architecture of ETI remultiplexing algorithm is described as a four-step process, and implemented as real-time embedded software in an ETI remultiplexing system. The design and implementation of the interoperable ETI remultiplexing system available for a small-scale transmission system for T-DMB service is described in detail.     

A network interface unit to support continuous media

The combination of high-speed multiservice networks and multimedia workstations offers considerable potential for the development of distributed multimedia applications. A key problem is how to integrate continuous-media types such as audio and video into a distributed workstation environment. An experimental system architecture based on a specialized multimedia network interface that attempts to provide this integration is described. The design and implementation of this system are discussed in depth in terms of workstation enhancement and distributed system support. A new approach to the problem of media synchronization is introduced, and the importance of quality of service in the architecture is highlighted. Experiences encountered during this work are described, comparison with other approaches is made, and likely future developments in multimedia network interfacing are discussed     

多媒体信号前后端处理SoC及其嵌入式应用

介绍多媒体信号前端处理SoC和后端处理SoC的结构特性及其嵌入式应用于数字摄象机和数字终端中.指出了SoC的嵌入式应用在电子信息系统和产品设计中的作用.     

Hardware/compiler codevelopment for an embedded media processor

Embedded and portable systems running multimedia applications create a new challenge for hardware architects. A microprocessor for such applications needs to be easy to program like a general-purpose processor and have the performance and power efficiency of a digital signal processor. This paper presents the codevelopment of the instruction set, the hardware, and the compiler for the Vector IRAM media processor. A vector architecture is used to exploit the data parallelism of multimedia programs, which allows the use of highly modular hardware and enables implementations that combine high performance, low power consumption, and reduced design complexity. It also leads to a compiler model that is efficient both in terms of performance and executable code size. The memory system for the vector processor is implemented using embedded DRAM technology, which provides high bandwidth in an integrated, cost-effective manner. The hardware and the compiler for this architecture make complementary contributions to the efficiency of the overall system. This paper explores the interactions and tradeoffs between them, as well as the enhancements to a vector architecture necessary for multimedia processing. We also describe how the architecture, design, and compiler features come together in a prototype system-on-a-chip, able to execute 3.2 billion operations per second per watt     

网络化集中控制型多媒体教室的设计

多媒体教室是信息时代高校的重要基础设施,传统的多媒体教室在使用和管理过程中存在着诸多不足。在简要给出多媒体教室设计原则的基础上,深入讨论了网络化集中控制型多媒体教室的系统构架和主要功能。文中设计的多媒体教室系统实现了远程控制、远程管理、远程维护和远程协助等功能,可以满足网络化集中控制和管理的需求。     

Cross-layer architecture for scalable video transmission in wireless network

Multimedia applications such as video conference, digital video broadcasting (DVB), and streaming video and audio have been gaining popularity during last years and the trend has been to allocate these services more and more also on mobile users. The demand of quality of service (QoS) for multimedia raises huge challenges on the network design, not only concerning the physical bandwidth but also the protocol design and services. One of the goals for system design is to provide efficient solutions for adaptive multimedia transmission over different access networks in all-IP environment. The joint source and channel coding (JSCC/D) approach has already given promising results in optimizing multimedia transmission. However, in practice, arranging the required control mechanism and delivering the required side information through network and protocol stack have caused problems and quite often the impact of network has been neglected in studies. In this paper we propose efficient cross-layer communication methods and protocol architecture in order to transmit the control information and to optimize the multimedia transmission over wireless and wired IP networks. We also apply this architecture to the more specific case of streaming of scalable video streams. Scalable video coding has been an active research topic recently and it offers simple and flexible solutions for video transmission over heterogeneous networks to heterogeneous terminals. In addition it provides easy adaptation to varying transmission conditions. In this paper we illustrate how scalable video transmission can be improved with efficient use of the proposed cross-layer design, adaptation mechanisms and control information.     

Design and Implementation of the Ensemble Remultiplexer for DMB Service Based on Eureka‐147

A new transmission system is necessary for the Digital Multimedia Broadcasting (DMB) service in Korea. Therefore, in this paper, we propose a new architecture for the implementation of a DMB transmission system based on Eureka‐147. We describe the design and implementation of the Ensemble remultiplexer, which is essential to the proposed system for remultiplexing ETI frames and MPEG‐2 transport streams. The proposed system provides a solution with high flexibility and low cost for multimedia broadcasting service. The functions of this transmission system have been verified by using our DMB receiver and other related systems.     

一种基于软交换的集群媒体服务器的系统结构

为了提供多媒体业务,以软交换为核心的NGN(next generation network)架构对媒体服务器产生了新的技术要求,目前因特网上现存的媒体服务器系统结构不能很好地满足这些要求.本文在深入研究NGN多媒体业务平台的基础上,提出了一种新型的集群媒体服务器系统结构,为问题的解决铺平了道路.文中详述了该系统结构中各节点的软件结构和关键设计问题,并介绍了目前已经在实验室实现的一个原型系统.     

A new service provisioning method in the multimedia/B-ISDN era

In the coming multimedia/B-ISDN era, customers must be able to design, define, and manage communication services based on their own concepts and knowledge of communications. This article proposes a new concept, intelligent dynamic service provisioning (IDSP), offering customers this capability. Service views of customers and carriers for multimedia services are presented. Based on these views, we propose an architecture for the IDSP system. Finally, the basic mechanism of the IDSP system and the technical issues related to this system are examined     

广东省视聆通公众多媒体信息网的设计与发展

视聆通（Ｇｅｎｔ）是广东省的公众多媒体信息服务网络平台，本文对视聆通网的系统设计，网络结构，应用及开发等方面作了全面介绍，并对该网络的发展前景作了展望。     

基于NGN的多方协同多媒体会议业务解决方案

文章首先介绍了下一代网络的特点和体系架构,并提出了基于下一代网络的多方协同多媒体会议业务的解决方案,包括此业务的特点、业务体系架构、业务主要功能以及业务实现流程等,最后为基于下一代网络的多方协同多媒体会议业务应用和推广提出了一些较好的建议。     

基于DirectShow的MPEG-2流媒体多路播放与实时存储系统设计与实现

DirectShow是基于COM的多媒体应用开发技术。介绍了DirectShow系统的体系结构,重点讨论了本系统中源Filter和解复用Filter的设计方案,以及不同MPEG-2传送流之间动态切换播放的关键技术,设计并实现了网络MPEG-2流媒体的多路播放系统,以及VOB格式的实时数据存储模式。     

多媒体网络体系研究综述

制定多媒体通信体系是一个重要问题，它关系着未来多媒体网络建设的成功设计和有效性能。由于现有的计算机网络体系结构没有考虑服务质量（ＱｏＳ）的控制，因此有必要对现有的网络体系进行改革，加强对多媒体信息传输的适应性。本文简述了传统的网络体系，并着重对现有的几种网络改进方案进行分类综述和对比分析。