多节目电视广播信号发生器的研制

多节目电视广播是一种新电视广播方式,它可在一个电视频道中播送50路彩色电视图象及伴音.本文叙述研制和生产中必不可少的信号发生器.     

Courses for credit.

"No course should be offered for credit by TV which has not been approved for inclusion in the college catalog, TV students should meet course standards to which residence students are held, and TV students should ordinarily come to the campus to take their examinations… ." For faculty load accounting, "it is recommended that a one-term television course (three 30-minute programs a week) should equal one-half of a normal full-time teaching load… ." Courses for credit via TV "… can be accomplished with no sacrifice of standards." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Some thoughts on television as an educational tool.

"A major conclusion warranted by all of the research findings is: TV can teach." The authors state that "… the relatively little research available, its character and findings, do not warrant the marked enthusiasm and overoptimism about educational television evidenced in many quarters." "In our view, TV at present should be regarded merely as one other communication channel for teaching purposes." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Television's impact on society.

"The advent of television has been a major phenomenon of American life in recent years. Judged by its rate of growth, the size of its audience, and the man-hours of attention devoted to it, television promises to become the nation's principal communication medium." Specific data are cited with regard to many topics including the following: dimensions of the medium, characteristics of the audience, owner's usage and opinion of TV, effects on other entertainment industries, effects on family and social activities, effects on children, political impact of TV, impact of TV on the economy, and the effectiveness of television advertising. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于HFC的三网合一理论浅析

从中国覆盖率最高的网—有线电视的 HFC 网出发,介绍了其接入优势和网络结构；基于 Cable Modem 技术,分析了实现电信网、计算机网、电视网三网合一的理论基础．     

基于双视点重构的3维自由立体显示前景视觉的优化

基于双视点重构的立体显示原理建立虚拟3维空间到真实空间的映射关系,据此诠释前景畸变产生的原因是虚拟空间到真实空间映射关系的非线性,进而提出以改变视点设置与变形虚拟3维空间相结合的方法改变水平位差分布,实现前景立体视觉的优化,并且评估了该方法校正前景畸变的效果以及对前景和远景双影的影响,最后,提出基于动态视点更新和动态空间压缩的立体全景视觉优化策略。与美国DTI公司的3维立体显示软件TextureEyes相比,笔者据此开发的3维立体显示软件的前景畸变和双影减小明显。     

立体视频传输中右通道整帧丢失的错误掩盖算法

当立体视频流通过网络传输时,由于网络拥塞等造成的数据包丢失常常会引起整个视频帧丢失.鉴于此,本文基于H.264/AVC视频编码标准提出了两种立体视频整帧错误掩盖方案,它们分别利用立体视频序列的不同特点来进行恢复.结果显示,利用这两种算法恢复的图像均能获得很好的主客观质量.     

Stereoscopic imaging and computer vision of impinging fires by a single camera with a stereo adapter

In this article, the novelty of using a single camera for stereoscopic imaging and computer vision of fire dynamics has been described. Specifically, 3D surface topology of the fires can be reconstructed and visualized using stereoscopic methodology. The basic stereo apparatus used in the present study consists of a high‐resolution digital camera and a stereo adapter, which is mounted to the front filter ring of the camera. A pair of stereo images could therefore be formed through the same lens system and recorded simultaneously on the same charge coupled device (CCD) chip. The mechanism of using a stereo adapter for stereoscopic imaging and its geometry has been elaborated in detail. The digitally reconstructed 3D results have also been validated by optical stereoscopic viewing using a pair of electronic shutter glasses synchronized with a computer monitor. The results have demonstrated that the single camera technique is a very powerful and cost‐effective diagnostic tool for fire studies. © 2005 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 15, 114–122, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ima.20044     

维护可寻址用户管理系统实践中的经验和体会

本文阐述有线电视可寻址用户管理系统中常见的故障以及解决的方法.     

彩色电视机兼作计算机显示器

主要介绍用软件的办法来改变ＶＧＡ显示卡的ＣＲＴ寄存器参数值，使之输出信号队伍电视标准，并将其引进电视机。