DVI接口在电视机及显示器中的应用

在现代的家庭影院中，常用的视频信号源如PC、DVD、HDTV机顶盒等，它们的数据都是数字的。显示器件如LCD显示器和LCD、LCoS、DLP电视等均采用数字的显示方式。目前，它们之间的连接大都使用模拟方式，如VGA、分量端子等。有一种新型的接口，在数字信号源与数字显示之间的连接使用数字方式，它就是DVI接口。     

几种重要的HDTV连接端子

现在,电视已进入数字年代,人们可以毫不费力地从有线电视网和卫星系统收看几百套电视节目。在许多城市内,数字高清晰度电视(HDTV)广播也与模拟电视一起并行发展,并且会将模拟电视淘汰出局。这种由数字技术带来的巨大变化不仅反映在各类电视机前面的屏幕上,而且也反映     

16:9在模数混合环境下存在的可行性研究和试验

16：9规格是HDTV确定的宽高比，也是数字标清电视的一种选择，其类似于宽银幕电影的视觉享受，无疑对观众具有很大的吸引力。然而，HDTV和16：9数字标清电视的普及似乎还有相当长的路要走，在目前许多电视台都购买了4：3和16：9两种宽高比可切换的数字摄像机和切换台的情况下，在目前有线电视传输，无线发射还基本都是模拟设备的情况下，在电视台模拟和数字设备（包括中心制作和卫星传输）混合共存的情况下，是否可能在几乎不增加投资的前提下提前开展16：9电视服务？对此，本文作者进行了研究和试验，形成了初步结论。     

国外动态

芬兰DNA是一家移动运营商，同时占据芬兰有线电视43％的市场份额。该公司决定通过现有的电视天线，让芬兰60％拥有数字地面电视的家庭，在2011年可收到HDTV节目。     

论现行电视体制到高清晰度电视的转变

论述了现有电视体制与高清晰度电视体制的区别,并较详细地介绍了高清晰度电视接收设备,以及HDTV信号接收机各环节的差异,简单介绍了国际、国内HDTV的发展现状。     

数字电视的发展与传输媒介

本文在分析了国内外HDTV和常规电视数字化的基础上,提出了我国发展HDTV和常规电视数字化的建议,美国的地面广播全数字HDTV传输制式对我国有重要参考价值,但我们必须结合国情加紧研制自己的HDTV传输制式。对常规电视的数字广播和数字传输也进行了讨论。     

HDTV中显示器件分辨率的探讨

随着电视广播从模拟向数字转移，作为下一代电视的高清晰度电视倍受关注。本文简要论述未来HDTV所用显示器件的分辨率及其制约因素，重点讨论CRT型电视中显示器件分辨率与整机清晰度的关系，分析高分辨率CRT的实现途径。另外，文章也涉及到标准清晰度电视用CRT对分辨率的基本要求。     

基于数字存储媒体命令和控制技术实现TS流特技播放

随着SDTV（标准清晰度电视）、HDTV（高清晰度电视）系统的开播或试播，模拟电视体系正在向数字电视体系过渡。在不久的将来，数字电视取代模拟电视已成历史的必然。本文着重对数字存储媒体命令与控制（DSM—CC）技术进行了研究，研究了面向单用户的DSM—CC码流编码算法；实现基于DSM—CC的数字视频流的几种特技播放模式。     

ST HDTV在线座谈技术问题精选

问:提高电视的清晰度的关键技术应该在显像管方面和卫星方面,那么这些方面的关键技术和产品是什么? 答:CRT只是现有显示器技术的一种。HDTV显示器使用很多新技术,如LCD、DLP和LCOS等。除了卫星外,数字电缆和地面传输也可以传输数字HDTV信号。     

数字电视时代的模拟解决方案

尽管高清晰数字电视(HDTV)的发展已经非常明朗，很多电视芯片解决方案供应商也更喜欢谈论HDTV，带来的市场机会，但模拟解决方案尤其是单片模拟电视解决方案所具有的优势，仍然能够保证模拟电视机继续在市场上对消费者有足够的吸引力。     

全数字化HDTV传输系统图像信源编码的研究

本文研究了一种全数字化HDTV传输系统图像信源编码方案。将运动补偿帧间预测,离散余弦变换编码和二维熵编码技术结合起来,通过对码率的自适应调节,实现HDTV图像信号的压缩编玛。在14.38Mb/s和20Mb/s码率,取得了良好的图像质量。应用数字调制技术,如16-QAM,能够实现在一个基带8MHz射频信道中传输全数字化HDTV。     

地面数字HDTV的频率规划和信道编码

本文研究地面数字ＨＤＴＶ的频率规划，提出ＨＤＴＶ服务面积的一种近似计算方法，阐述了ＨＤＴＶ两种传输方案中必须解决的关键技术，提出了ＨＤＴＶ应用的级连码设计原则，探讨ＨＤＴＶ的系统结构，对发展我国数字ＨＤＴＶ提出参考意见。     

基于ST解决方案的HDTV机顶盒软件的设计实现

介绍了一种数字高清晰度电视机顶盒系统软件的研究和开发。该软件配合机顶盒硬件平台构成一个整机系统，除完成解调、解码外，还能向用户提供一系列选单式的交互操作功能。此成果已得到实际应用。     

平板显示器上HDTV格式转换技术的实现

HDTV高清晰度电视的发展对显示器提出更高要求,利用视频格式转换技术实现HDTV信号在平板显示器上的显示与控制具有广泛的实用价值。先对格式转换系统进行系统设计,再对其关键技术进行讨论并提出在Pixel-works中的实现方案,主要涉及帧率转换和分辨率幅型比变换。开发出的系统画面清晰,细节分辨率高,具有很高的实用价值。     

基于DSP的多制式数字电视字幕卡硬件设计

基于DSP设计了一款多制式数字电视字幕卡,充分利用TI公司新一代媒体处理器DM642丰富的外设接口和其高性能CPU,配合SDI编解码芯片CLC031和CLC030,实现标准清晰度或高清晰度电视信号与来自PCI接口的PC机视频数据混合,结构紧凑,实用性强,可广泛应用于数字电视制作系统、非线性编辑等系统中.     

Transmission System for ISDB-S

Broadcasting satellite (BS) digital broadcasting of HDTV in Japan is laid down by the ISDB-S international standard. Since it has a unique transmission technique that can use a number of modulation schemes simultaneously in one RF carrier, the most suitable modulation scheme for the broadcast content can be selected even within one RF carrier. In addition, a hierarchical modulation technique that can mitigate rain attenuation can be introduced as an application of this transmission system. This paper shows how the transmission system establishes such a versatile function.     

The US HDTV standard

This standard for digital high-definition television has been submitted to the Federal Communications Commission for its approval. Based as it is on the MPEG-2 video compression and transport protocol, multiple transmission formats, Dolby AC-3 digital audio, and vestigial sideband digital modulation, this HDTV system will supply the home with superb images and spectacular sound while also, as part of the National Information Infrastructure (NII), relaying digital data. An HDTV system employing multiple transmission formats, digital compression, packetization, and modulation techniques is a marked advance over current world television standards such as NTSC, PAL, or SECAM     

A concept of digital terrestrial television broadcasting

The future terrestrial television broadcasting system should support the transmission of a digital HDTV signal with a high spectral efficiency. In addition, this system should maintain graceful degradation as the actual analog systems, and should be compatible with the SDTV. The system compatibility can be achieved by using a hierarchical HDTV source-coding scheme that can provide at least two (HDTV, SDTV) or three (HDTV, EDTV, SDTV) hierarchy levels: SDTV image quality will be expected for portable receivers, and HDTV/EDTV image quality will destinate to stationary receivers with roof-top antennas. Taking into account the receivers' antenna gains and the different channel conditions, there will be a difference of 25–30 dB between the received powers of the stationary and the portable receivers. Therefore, the design of a powerful and a suitable transmission scheme for the future broadcasting of the digital HDTV signal will be a technological challenge. In this article we describe a concept of a flexible reconfigurable hierarchical digital terrestrial TV broadcasting system for clear and taboo channels. The flexibility of the proposed scheme easily permits the receivers to support different reconfigurable modes: One HDTV program or multi-programming EDTV or SDTV (for fixed receivers up to 5 × SDTV in clear and up to 2 × SDTV in taboo channels; for portable receivers up to 2 × SDTV.) The system achieves a high interoperability with the Satellite Baseline system. It maintains a graceful degradation and provides a hierarchical complexity. It is based on a concatenated coding scheme. The inner code of the concatenated coding scheme is combined with multi-resolution modulation. The basic constellation is a 64-QAM, which will be operated in clear channels. It can be reconfigured to a 16-QAM in the case of taboo channels. The principle of OFDM with very rugged frequency/time synchronization mechanisms is used to combat the frequency selectivity and the co-channel interference (CCI) in the channel. Known pilot symbols are sent regularly in order to perform coherent detection.The authors are within the RACE-dTTb and the German HDTV-T project.     

A video codec LSI for high-definition TV systems withone-transistor DRAM line memories

A video codec LSI for high-definition television (HDTV) systems has been developed. By using a time-compressed integration encoding technique, it converts a 20.0-MHz bandwidth luminance signal and two 5.0-MHz chrominance signals into a compressed image signal at 48.6-MHz sampling frequency. It is useful in many HDTV application systems, such as 400-Mb/s digital transmission system, a video disk player system, or an analog transmission system. Over 288000 elements, including a 52-kb one-transistor DRAM (dynamic random access memory) line memory specially developed for this LSI, were integrated on a 12.16×12.10-mm² chip. A standard cell layout method and a 1.2-μm CMOS logic LSI process were used