中国地面数字电视标准综述

阐述我国地面数字电视标准体系及标准情况,重点介绍地面数字电视接收机标准内容,提出包括推动产品认证和标准化在内的下一步工作计划.     

IEC的数字电视标准化工作

介绍了IEC在数字电视领域的标准化活动和相关标准的制定情况，以及该领域未来发展趋势。     

做好数字电视标准化工作为电视产业的跨越式发展提供保障

数字电视的技术开发与产业化工作受到信息产业部领导的高度重视,信息产业部今年工作重点之一是开展数字电视工作。数字电视标准化专项工作正在紧张有序地开展,国内各相关研究机构、企业针对数字电视带给我国信息产业发展的历史机遇投入了很高的热情,并在各自不同的专业领域开展了相关的工作。全国音频、视频及多媒体系统与设备标准化技术委员会承担了数字电视标准专项工作,组织国内相关技术专家和不同领域的技术骨干,围绕数字电视接收机终端产品对系统的标准化需求、数字电视接收设备技术体制标准化需求、数字电视接收机终端产品综合性能的标准化需求、数字电视接收机与家庭信息网络互连互通的标准化需求、数字电视接收机产品专利战略等多个领域开展了研究。作为数字电视产业的基础性工作,标准化将产业链中各个环节有机连接起来,为彼此间的协同工作提供技术支持。为此,本刊今年特别推出数字电视专栏,请有关专家介绍数字电视性能指标、测试、接口、关键件、条件接收、中间件等一系列技术细节,相信将会对数字电视产业的发展具有重要的指导意义。     

手机电视发展现状及应关注的问题

介绍了全球手机市场发展现状和面向手持终端的数字电视广播网络标准化进展情况，分析了手机电视业务的市场发展前景，指出发展手机电视业务应关注的几个主要问题。     

地面数字电视国标中的ADTB-T技术特点及应用

中国国家标准化委员会于2006年8月颁布了数字电视地面标准<数字电视地面传输系统帧结构、信道编码和调制技术规范>.该标准的主要技术基础之一是上海交通大学多年积累的ADTB-T技术.针对我国数字电视地面广播需求,阐述了ADTB-T技术的特点,介绍了ADTB-T技术的具体内容.进一步以国标中ADTB-T技术的部分测试结果,推广应用情况辅证了国标中ADTB-T技术的优势.     

国内外数字电视及其标准化的研究状况

介绍了世界发达国家数字电视发展及其标准化的状况,重点阐述了我国数字电视的发展状况及远景目标,分析了我国发展数字电视所具有的优势及存在的问题,并对解决这些问题提出了看法.     

数字电视"十一五"发展思路

1我国数字电视产业发展情况 1．1数字电视终端产品标准化工作取得阶段性成果 在反复征求行业骨干企业意见的基础上，2006年3月，信息产业部发布了数字电视显示器、接口、机卡分离等25项数字电视接收设备行业标准。包括基础标准、数字电视接口标准、数字电视显示器标准、卫星数字电视机顶盒标准和数字电视机卡分离标准。     

规范管理,质量认证,促进业务发展

本文从公司企业行政管理的角度,着重介绍天威公司实施ISO质量认证的情况,试图揭示天威公司在引入国际质量标准体系后,通过规范化、标准化、透明化的管理,对公司各项业务,特别是数字电视整体转换和未来发展所发挥的积极作用。     

对有线数字电视电子业务指南相关规范的建议

以广电总局<有线数字电视广播业务信息应用指南(暂行)>和<有线数字电视电子节目指南指导性意见(暂行)>规范为指南,结合 DVB相关标准和我国有线数字电视运营的实际情况,参照我国直播卫星、移动多媒体广播电子业务指南的相关规定和标准,提出了关于在有线数字电视电子业务指南中增加相关应用并标准化的设想.     

数字电视相关技术及应用前景

从数字电视的特点、数字电视与其他各类电视相比的优点及数字电视相关技术等方面,详细介绍了有关数字电视的情况,并对数字电视的发展前景进行了分析.     

数字有线电视机顶盒的研究

概述了数字电视的产业化发展现状以及国内外标准化状况，给出了数字有线电视机顶盒的框图，并对其层次结构做了分析。     

数字音视频领域标准化现状分析

对数字音视频领域产业发展状况和国内外技术标准进行了分析,并重点分析了数字电视的标准情况,针对我国数字音视频领域标准化工作现状提出了今后的工作思路.     

DTV standards and transition: A comparative policy analysis

China recently has emerged as a serious player in setting ICT standards, as evidenced by its presence in major conferences on standardization with the International Telecommunications Union. While the ATSC standard contributed to the successful completion of the DTV transition in the US, China’s home-grown DTV standard bears little, to date, on its relative success in converting one third of its cable households to digital service. In light of these differing outcomes, this paper identifies and compares the strategies behind the quest for national DTV standards by retracing the key policy initiatives in China and the US. Our analysis suggests that protectionist impulses shaping distinct standards for the US (Grand Alliance), China, and other regions dampen prospects for a global standard in DTV. However, the US has been more successful at maintaining the kind of balance between industry and governmental policy that is critical to maintaining technological innovation and a competitive marketplace.     

FTV: Free-viewpoint Television

FTV (Free-viewpoint Television) enables us to view a 3D scene by freely changing our viewpoint. FTV is the ultimate 3DTV with infinite number of views and ranked as the top of visual media. We realized FTV by developing various types of ray capture, processing and display technologies. We have also realized all-around ray-reproducing 3DTV. The international standardization of FTV has been conducted in MPEG. The first phase of FTV was MVC (Multi-view Video Coding) and the second phase is 3DV (3D Video).     

Depth map creation and image-based rendering for advanced 3DTV services providing interoperability and scalability

Due to enormous progress in the areas of auto-stereoscopic 3D displays, digital video broadcast and computer vision algorithms, 3D television (3DTV) has reached a high technical maturity and many people now believe in its readiness for marketing. Experimental prototypes of entire 3DTV processing chains have been demonstrated successfully during the last few years, and the motion picture experts group (MPEG) of ISO/IEC has launched related ad hoc groups and standardization efforts envisaging the emerging market segment of 3DTV. In this context the paper discusses an advanced approach for a 3DTV service, which is based on the concept of video-plus-depth data representations. It particularly considers aspects of interoperability and multi-view adaptation for the case that different multi-baseline geometries are used for multi-view capturing and 3D display. Furthermore it presents algorithmic solutions for the creation of depth maps and depth image-based rendering related to this framework of multi-view adaptation. In contrast to other proposals, which are more focused on specialized configurations, the underlying approach provides a modular and flexible system architecture supporting a wide range of multi-view structures.     

Design of Synchronization and T‐STD Model for 3DTV Service over Hybrid Networks

The objective of digital broadcasting has evolved from providing a plain video service to offering a realistic visual experience. Technologies such as 3DTV and UHDTV have been suggested to achieve this new objective by providing an immersive and stereoscopic visual experience. However, owing to the high bandwidth requirements of such services, the broadcasting industry has faced a challenge to find a new transport mechanism for overcoming the bandwidth limitation. The standardization organizations, the Advanced Television Systems Committee, Digital Video Broadcasting, and Telecommunications Technology Association, have been working on the integration of broadcasting and a broadband network (IP) to resolve the bandwidth issue of realistic video services. This paper introduces a frame‐level timeline synchronization and transport system target decoder model for providing a stable 3DTV service over a hybrid network. The experimental results indicate that the proposed technologies can be successfully adopted as a reference model in a broadcast‐broadband hybrid 3DTV service and other IP‐associated hybrid broadcasting services.     

立体电视视频质量主观评价方法研究

本文主要研究了立体电视视频质量主观评价的标准化进展与相关的研究情况,着重对ITU-R BT.2021号标准进行了解读,从素材选择、评价要素、评价方法、观看条件、评价人员、数据处理等六个方面介绍了立体视频质量主观评价实验的具体实施方法。     

An HDTV‐Compatible 3DTV Broadcasting System

We introduce a high‐definition three‐dimensional television (3DTV) broadcasting system that is fully compatible with the existing transmission system of high‐definition television (HDTV). Specifically, we developed high‐definition 3DTV broadcasting subsystems including a 3DTV camera, 3DTV video multiplexer and demultiplexer, 3DTV receiver, and 3DTV outdoor broadcast van. To verify the developed subsystems, we performed experimental services of 3DTV broadcasting during the 2002 FIFA World Cup Korea/Japan.. According to our subjective evaluation test, 88% of 273 viewers rated the perceived depth of 3DTV as “Good,” and 36% of the viewers preferred 3DTV to other digital broadcasting services.     

Impact of 2D and 3D display watching on EEG power spectra: A standardized low-resolution tomography (sLORETA) study

We investigated whether watching two-dimensional television (2DTV) or three-dimensional television (3DTV) resulted in differences in the brain’s processing of sensory information. We divided 25 participants into 2DTV (n = 13) and 3DTV (n = 12) groups. Participants watched 2DTV or 3DTV for 1, 2, or 3 h on different days. Before and at the end of each session, electroencephalography (EEG) was recorded for 10 min. The Simulation Sickness Questionnaire (SSQ) and the Visual Analog Scale (VAS) were used to assess general discomfort before and after watching. Each frequency band of the resting EEG was transformed into a standardized low-resolution electromagnetic tomographic (sLORETA) image. In the 2DTV group, 2 h of watching increased theta power in the central cortex and 3 h of watching increased beta power in the occipital cortex. In the 3DTV group, 3 h of watching increased delta power in the parahippocampal gyrus and middle frontal cortex. Theta power was significantly higher in the insular cortex after 3 h of 3DTV than after 3 h of 2DTV. SSQ scores were significantly higher after 1 h of 2DTV than after 1 h of 3DTV. Watching 2DTV vs. 3DTV triggered different time-dependent activity patterns. Watching 3DTV for 3 h increased slow-wave activity in the prefrontal cortex, while watching 2DTV increased fast-wave activity in the occipitoparietal cortex. Up to 2 h of 3DTV watching did not cause major changes in fatigue or EEG activity compared with 2DTV. Our findings promise to be useful in designing safety guidelines for watching 3DTV.