基于DVB-H的新一代手机电视技术

DVB-H是数字视频广播DVB组织推出的新一代多媒体移动标准,可以为手持设备传送强大的点到多点的多媒体服务。本文对DVB-H标准进行了解析,介绍了基于该标准的新一代手机电视技术,并分析了DVB-H的发展现状,对基于DVB-H的新一代手机电视技术的前景也进行了预测。     

DVB-H与MediaFLO谁能笑到最后?

1、DVB-H在欧洲广泛试验 DVB-H被看作是欧洲的移动电视标准,其由DVB组织开发,并得到DVB组织办公室的支持.欧洲电信标准协会于2004年批准DVB-H成为欧盟移动电视标准.欧洲许多国家从2004年以来都对DVB-H进行了试验.     

DVB-H接收机性能测试

文章首先简单介绍了DVB-H技术及其发展现状,然后主要介绍了DVB-H接收机性能测试内容以及测试方法。     

手机电视业务标准——DVB-H

DVB-H标准是目前手机电视业务创建过程中普遍关注的一个热点话题,具有广泛的内涵。本文讨论了DVB-H的多协议封装前向纠错、时间分片、4K模式和深度符号交织、传输参数信令等关键技术,并分析了手机电视的几种运营模式,最后总结了DVB-H标准存在的问题以及发展前景。     

DVB-H的关键技术与应用服务

DVB-H标准是在DVB-T标准基础上针对移动手持终端的数据和多媒体服务而制定的新一代数字地面广播标准。本文首先介绍了DVB-H标准采用的时间分片、MPE-FEC等关键技术和相关的研究成果,并且还介绍了基于DVB-H网络的IPDC服务系统的参考结构及其相关技术研究方向。     

DVB-H系统的最新进展以及面临的竞争

回顾了DVB-H标准的发展历程,介绍了DVB-H系统的技术架构、关键技术、最新进展以及所面临的竞争,并以数字电视广播结合移动通信网络之交互式业务应用为例,说明了未来技术的发展方向.     

DVB-H中的时间分片技术

阐述了DVB-H的系统结构,对以降低功耗、实现无缝频率切换和替换频率的无缝扫描为目标的时间分片技术进行了理论分析,给出了时间分片的相关算法.此外,还介绍了一款DVB-H芯片的性能.     

数字电视多媒体移动标准DVB-H简介

新一代多媒体移动标准DVB-H一直受到广泛关注。文章介绍了DVB-H的标准体系、系统结构、关键新技术、商业试验情况，以及典型的网络配置。     

新闻

诺基亚演示手机电视 芬兰诺基亚日前在新加坡举行的“NOkia Connection 2004” 上现场演示了可以收视电视节目的电视手机规格“DVB-H”。这是诺基亚在太平洋地区的首次DVB-H规格演示。DVB-H是在家用电视机的微波数字电视播放方式“DVB-T”的基础     

DVB-H技术专利分析

近年来,移动多媒体正日益深入人们的日常生活,“手机电视”成为谈论的热点.DVB-H是一种实现手机电视业务的国际标准,是建立在DVB和DVB-T之上的传输标准.对DVB-H技术相关的中国专利申请进行了统计分析,包括申请类型分析、申请时间分析、申请人国别/地区分析以及主要申请人分析,介绍了DVB-H在中国的专利申请现状.     

多媒体移动接收与DVB-H的发展

DVB-H是数字视频广播(DVB)组织为通过地面数字广播网络向便携/手持终端提供移动多媒体业务所制订的最新标准.本文分析并介绍了3G、WLAN和DVB-H在多媒体移动接收领域各自的技术特点和最新进展,对未来多媒体移动接收领域的发展提出了自己的观点.     

The DVB-H Mobile Broadcast Standard

The digital video broadcasting-handheld (DVB-H) standard is one of the latest transmission standards developed by the digital video broadcasting (DVB) Project. DVB-H, which is based on the standard for digital terrestrial television (DVB-T), offers mobile television and other broadcasting services on small portable devices such as mobile phones. This article presents an overview of the DVB-H standard with respect to structure, features, technology, performance, and resources.     

数字电视多媒体移动标准DVB-H浅析

DVB-H是数字视频广播(DVB)组织为通过地面数字广播网络向便携/手持终端提供移动多媒体业务所制订的最新标准。对DVB-H系统的构成、关键新技术、技术的试验情况及技术专利情况进行了分析。     

实现手机电视的技术方式

DVB-H手机电视技术从传统的数字电视技术演进而来并广泛应用于3G移动通信中。回顾数字电视技术的发展历史,比较基于手机的流媒体业务、MBMS、DVB-H、MediaFLO和DVB-S不同调制方式的数字电视技术的优缺点,并分析5种传输系统在不同网络环境中的运行性能。     

DVB-H、S-DMB技术比较分析

新一代多媒体移动标准DVB-H和S-DMB最近十分引人关注。对DVB—H和S-DMB的多个方面进行介绍和分析。     

基于E语言的数字电视DVB-H系统数据链路层功能验证研究

随着数字电视的迅速发展和移动多媒体设备——手机,PDA等的普及,新的技术被发展并应用于手持设备数字电视的接收,DVB-H手机电视标准提供了很好的手机电视接收解决方案。该标准是DVB-T的扩展应用,在数据链路层实现了时间分片、多协议封装和前向纠错功能,从而降低了平均功耗,增强了移动接收的鲁棒性。提出了基于E语言的DVB-H系统数据链路层的功能验证环境,并给出了具体验证步骤和结果分析,最后通过验证分析完善和改进了DVB-H数据链路层系统功能,此外对基于E语言的验证方法进行了一定的研究。     

Affordable Mobile TV Services in Hybrid Cellular and DVB-H Systems

Mobile TV services are expected to become a key application in future wireless networks. The recently proposed terrestrial digital broadcast technology, DVB-H, especially designed for mobile services, is regarded as a powerful alternative to the 3G cellular networks that already offer these services out on a point-to-point basis. Unfortunately, the cost of supporting real-time streaming and full area coverage seems to be very high compared to fixed TV services. In this article we discuss hybrid IP datacast DVB-H and 3G systems as a possible solution for providing affordable network infrastructure and services. Our approach is DVB-H centric. The 3G cellular system plays the role of providing interactivity, error reporting, and repair for the DVB-H broadcast channel. To enable an easy and efficient interworking of DVB-H and 3G, we employ forward error correction at the application layer with digital fountain coding. The main way to provide lower cost services is to avoid full DVB-H area coverage from the beginning and to perform an incremental DVB-H network deployment that follows the user demand. In this direction, to hide the discontinuity in coverage from the perception of users, we propose to take advantage of the bursty character of DVB-H transmissions and the mobility of users. This is possible by sending additional parity data, either with the DVB-H or the cellular network, in the time intervals between original service bursts. We evaluate the potential DVB-H infrastructure cost savings determined by transmitting additional parity data in DVB-H when targeting vehicular users. The implications of delivering parity data through the cellular network also are discussed. The numerical investigations show a potential for significant cost savings compared with the traditional approaches     

Mobile television receivers: a free-to-air overview - [integrated circuits for communications]

In contrast to mobile television standards such as DVB-H and MediaFLO, the use of existing free-to-air broadcast television in mobile devices is an intriguing concept that has so far garnered little attention. Standards such as DVB-T and analog television broadcast are pervasive worldwide, and their use in mobile applications circumvents many of the deployment challenges facing DVB-H and the like. However, there are severe technical challenges in doing so: mobility, power consumption, antenna performance, and mixer harmonic rejection are just a few of the issues facing the use of free-to-air broadcast in mobile devices. In this article we address these issues, with particular focus on DVB-T digital and NTSC/PAL/SECAM analog broadcast standards.     

多标准数字广播网络终端切换技术研究

首先介绍了移动终端在不同数字广播网络间(以DVB-H和DTMB为例)移动时得到无缝切换服务的需求与场景.随后介绍了欧洲的数字广播标准DVB-H,DVB-T和中国的数字广播标准DTMB,切换的判决条件以及节日的同步过程,终端进行切换的状态转换机制,以及实现切换功能的移动终端的模块结构设计.最后给出了实验结果.