Internet delivery of MPEG-4 object-based multimedia

Object-based multimedia communications demand a much more sophisticated delivery framework for delivering synchronized, multiplexed, media object streams across the Internet or wireless networks. We describe the Moving Picture Expert Group's Delivery Multimedia Integration Framework (DMIF) and examine several remote retrieval issues. We also describe our design and implementation of a DMIF-based MPEG-4 multimedia streaming system.     

MPEG-4 SLS无损增强层的编码

介绍了MPEG-4音频可分级无损压缩编码方案中无损增强层的编码。对无损增强层中的残差映射、比特平面编码、基于上下文的算术编码、低能量编码等技术细节进行了深入讨论和分析。最后将MPEG-4SLS与Monkey’s Audio编码方案进行了比较，以此来说明MPEG-4SLS优异的压缩性能。     

The MPEG-4 Standard Leonardo Chiariglione

Two main technologies have appeared,that are changing the relationship of humans with information.One is the digitisation of radio/television enabled by the MPEG-2 standard, and the other the infrastructure-independent networking capabilities made possible by the Internet.The two technologies,however,are largely complementary and,in spite of many efforts to favour a convergence,still largely antithetic.In October 1998,MPEG-4，a new standard of the MPEG family,will be released by the MPEG Committee. The standard has been designed to provide support to the radio/television and Internet paradigms, and is therefore poised to become the enabling technology for their convergence.     

MPEG-4标准在IPTV中的应用

随着信息技术和互联网的飞速发展，多媒体信息已成为人们获取信息的主要载体之一。作为多媒体技术的关键，多媒体数据压缩编码近年来在技术及应用方面都取得了长足进展。主要介绍基于内容的第二代压缩编码技术的典型代表——MPEG-4标准的技术特点，并对其在IPTV业务中的应用作了详细阐述。     

MPEG-4中的音频编码技术

本文主要介绍了MPEG－4的音频概念、特征及音频工具，重点介绍了音频中用到的编码技术。     

UEP implementation for MPEG-4 video quality improvement on RLC layer of UMTS

An unequal error protection (UEP) scheme is proposed which complies with the UMTS standards defined by 3GPP and is also customised according to the requirements of the video codec (MPEG-4), channel conditions and bandwidth limitations. The results show significant PSNR and frame loss saving improvements.     

MPEG—4形状编码技术

MPEG－4是ISO／IEC最新通过的,是第一种基于对象的、提供基于内容的访问能力的全新多媒体表示标准。为了提供这种功能,MPEG－4采用了多种技术手段。其中视频部分采用的最重要的技术手段就是形状编码技术。     

MPEG-4标准剖析

本文分析了MPEG-4的七个功能、MPEG-4视频编码规则、音频编码规则及MPEG-4应用举例等.     

基于FPGA的MPEG-4编解码器

您是否曾想在您的FPGA设计中使用先进的视频压缩技术,却发现实现起来太过复杂?现在您无需成为一名视频专家就能在您的系统中使用视频压缩.赛灵思新推出的MPEG-4编码器/解码器核可以帮助您满足视频压缩需求.     

MPEG-4标准的校验模型

ＭＰＥＧ－４校验模型为ＭＰＥＧ－４标准的制定提供了一个完全定义的视频编码核心算法平台,为世界上各个实验室开展这方面的研究提供了基础和统一开发环境。本文概括了此模型的结构并阐述了其所涉及的相关技术。     

MPEG-4标准中的视频编码

MPEG－4是一个全新的多媒体标准,采用了基于对象和模型的编码方法,本文简要总结了MPEG－4视频编码的各种特点,并对其中的纹理编码、形状编码、静止纹理编码、脸部对象编码、网格对象编码、Sprite对象编码以及可分级编码作了简要的介绍。     

传输多媒体集成框架（DMIF）

一、DMIF制定的目的 MPEG-2TS流在专用网上数字电视信号的传输方面已获得巨大成功,但是MPEG-2传输流的设计和优化还是对于某一具体传输媒质而言的,这使得MPEG-2TS在同一层中还包括了数据链路层的特性(如同步字节和固定的分组长度),以及同步特性(如参考时钟和时间戳),因此实现功能分离就很难;并且数据连路层的特性已经在计算机网络中存在,MPEG-2TSoverIP或ATM的传输就需要删除重复的功能或者是接收这一重复的功能,因此很难实现MPEG-2内容在电视网或其他网络上的高效传输.     

MPEG-4中DMIF协议的结构及功能

文中着重描述了ＭＰＥＧ－４标准引入的ＤＭＩＦ协议的通信体系结构，并概述第一版ＤＭＩＦ协议的以及第二版将要做的功能扩育。     

MPEG-4 high-efficiency AAC coding

The name MPEG-4 high-efficiency AAC (HE-AAC) refers to a family of recent audio coders that was developed by the International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Moving Picture Experts Group (MPEG) by subsequent extension of the established Advanced Audio Coding (AAC) architecture. These algorithmic extensions facilitate a significant increase in coding efficiency relative to previous standards and other known systems. Thus, they provide a representation for generic audio/music signals that offers high audio quality also to applications limited in transmission bandwidth or storage capacity, such as digital audio broadcasting and wireless music access for cellular phones. This article presents a compact overview of the evolution, technology, and performance of the MPEG-4 HE-AAC coding family.     

MPEG-4编解码器技术研究

分析了MPEG-视频编解码系统结构,在此基础上给出一个实时的MPEG-4视频编解码系统架构,并对解码的具体步骤进行了详细分析,预测了MPEG-4的编解码芯片的趋势.     

MPEG-4标准浅析

对支持多媒体应用的MPEG-4标准关键技术进行分析，归纳了MPEG-4标准的新特点，并对MPEG-4的应用前景进行了展望。