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。     

地面同播数字HDTV的规划参数分析

本文对地面同播数字高清晰度电视（ＨＤＴＶ）的规划参数的合理选择进行分析，讨论ＨＤＴＶ的服务面积与Ｄ／Ｕ比（常规电视／ＨＤＴＶ或ＨＤＴＶ／ＨＤＴＶ同频道设置）、阈值信噪比之间的关系。     

地面数字HDTV的规划参数（续）

地面数字ＨＤＴＶ的规划参数（续）潘振中（广电部标准化规划研究所）４射频信号噪声比和最低场强４．１射频信号噪声比要求的射频信号噪声比同制式有关。与模拟制不同，对于数字电视，当信号噪声比高出阈值后，就可达到要求的接收质量。表２列出了已经提出的６种地面数字...     

天津大学研制成功HDTV编码码流转换器

天津大学研制成功ＨＤＴＶ编码码流转换器随着数字ＨＤＴＶ地面广播进入实用阶段，我国已开始研制数字ＨＤＴＶ功能样机。因活动图象实时压缩编码运算复杂，故研制编码器十分困难。其硬件规模大，成本高，又尚无进口设备可用。为此，天津大学研制了ＨＤＴＶ编码码流转换器...     

环球视听

环球视听赴美考察ＨＤＴＶ传输技术为进行地面数字高清晰度电视（ＨＤＴＶ）制式研究，广播电影电视部派标准化规划研究所所长阎洪奇和总工程师潘振中于１９９４年８月２６日至４月２日赴美作ＨＤＴＶ传输技术考察。主要访问单位有位于亚历山特里亚的先进电视中心（ＡＴＴ...     

高清晰度电视的现状及其发展

本文在回顾和分析高清晰度电视（ＨＤＴＶ）体制的基础上，对ＨＤＴＶ技术的现状和发展趋势进行了讨论。文章指出，ＨＤＴＶ传输的技术主要包括信源压缩编码、信道编码技术有传输调制技术。目前ＨＤＴＶ与现有常规电视并存，统一的ＨＤＴＶ体制尚未形成。数字地面广播将是今后ＨＤＴＶ发展的主流。     

高级数字HDTV视频编码系统的性能分析

高级数字高清晰度电视（ＡＤ－ＨＤＴＶ）是一个全数字同播系统，它通过一个６ＭＨｚ地面广播“禁用”频道为广大覆盖区提供高质量的ＨＤＴＶ业务。本文详细介绍了ＡＤ－ＨＤＴＶ视频编码系统技术及其性能分析。     

地面广播数字HDTV的压缩技术

数字制式的任务之一是压缩ＨＤＴＶ信源编码，使它能以６ＭＨｚ带宽地面电视信道传送。ＨＤＴＶ压缩技术的主要目标是在保证满意的图象质量下，降低比特率，本文将回顾这些技术，并论述它们在所提议的数字ＨＤＴＶ制式中应用。     

评述高清晰度电视（HDTV）的发展及影响

本文简述了世界上开发ＨＤＴＶ的局面，对美国的ＨＤＴＶ发展过程，ＨＤＴＶ重要参数的确定，ＨＤＴＶ的估计价格，ＦＣＣ对ＨＤＴＶ推进的要求进行了分析，对宽屏电视、ＣＡＴＶ网络的新进展进行论述，并对我国发展ＨＤＴＶ提出一些看法。     

研究HDTV传输的新体制

本文在回顾和分析国际ＨＤＴＶ现状和发展的基础上,提出了我国发展ＨＤＴＶ的基本设想。本文指出在地面ＨＤＴＶ广播中采用扩展频谱传输体制的方案将是形成具有我国特色的ＨＤＴＶ工业的明智选择。     

浅析高清晰度电视

本文介绍高清晰度电视的特点,基本参数要求,全数字高清晰度电视系统及发展动态。     

数字HDTV信源解码器的硬件实现

本文提出了一种主要基于FPGA的数字HDTV信源解码器的总体设计方案和硬件实现方法.同时还介绍了整机的测试系统和测试结果.目前,该信源解码器已研制完成,并参加了于1998年9月8日至11日在北京成功进行了我国HDTV功能样机系统的公开演示.     

Choosing an American digital HDTV terrestrial broadcasting system

A public process has been in place in the United States for six years to establish an HDTV terrestrial broadcasting standard. The process, having moved through a planning phase, a competition phase, and an examination phase, has now entered a cooperation phase. Remarkable progress has been made-a testament to the process. During 1994 the American digital HDTV terrestrial broadcasting system will be tested, fully documented, and recommended to the FCC for adoption     

高清晰度电视（HDTV）的压缩编码

本文简述HDTV压缩编码的发展;介绍HDTV的140兆比特/秒传输,数字/模拟混合型HDTV卫星广播,以及全数字HDTV地面广播中采用的图像压缩编码原理;并简要展望其发展前景。     

HDTV evolves for the digital era

HDTV was created in an era of analog TV, seeking higher performance through the enhancements feasible in such an environment, such as higher resolution. The digital era is now in place, bringing compression and other processing enhancements, along with a new order of requirements, possibilities, and constraints for TV systems. HDTV in this era has a new meaning, with very different criteria being established. The paper traces the development of HDTV and details current work to establish HDTV systems appropriate for evolving and future digital application     

High definition television systems

High definition television (HDTV) services will play the most important role in the digital television systems for the future. HDTV is already broadcast daily in Japan and advanced television (ATV) standards will soon be established in the US. The hardware systems for two HDTV systems, the 1125/60 and 1250/50 systems, have already been developed. Their outlines are described in the paper. Signal processing of HDTV is mainly carried out by digital methods on both the studio and receiver sides. The principles of processing are the same as for conventional television but the higher clock frequency and larger quantity of information require more sophisticated hardware. Digital signal processing methods are the key technology in HDTV broadcasting systems regardless of whether modulation is analog or digital. Some broadcasting systems are already practical use while others, are experimental. The author discusses these systems. The aim of the article is to present a global scope of the HDTV technology     

Digital HDTV compression techniques

The roles that digital high-definition television (HDTV) compression techniques play in HDTV applications, such as digital HDTV terrestrial broadcasting, are discussed. Images can be encoded intraframe and/or interframe, depending on the requirement of compression rate and the picture quality. Using source coding, redundancy in the spatial and temporal domains can be greatly reduced while preserving the level of image quality required for the given application     

Obtaining higher resolution in Asia

Important advances in digital signal processing for HDTV have occurred in Asia. This article outlines these advances, including trends in standard resolution television (STV) and progress in superhigh definition (SHD) imaging. Video coding, video recording, SHD image processing, and digital satellite broadcasting are covered, and trends in digital satellite TV and the challenges facing successful implementation of the technology are presented, as well as future research and development targets for HDTV     

中国增强电视和高清晰度电视发展策略分析

本文阐述了欧洲和日本的增强电视的发展背景，现状和存在问题，对中国应如何发展自己的增强电视提出了建议，分析了高清晰度电视系统标准参数制订中应该考虑的重要因素，对中国高清晰度电视发展政策做了归纳。