一种嵌入式电子邮件系统的设计与实现

电子邮件是Internel上最早出现的服务之一，随着嵌入式产品成为Internel主要的信息终端之一，嵌入式电子邮件系统的开发也就势在必行。详细介绍了一种在网络电视上使用的嵌入式电子邮件系统的设计方案和实现方法。     

PLC以及变频器在电视演播工艺中的应用

本文通过分析电视演播工艺中的功能要求．介绍利用PLC以及变频器实现电视演播技术与楼宇空调设备自动控制技术的融合方案，提高了电视演播的节目质量。     

一种数字式彩色电视副载波综合器的设计

介绍一种适于利用电视信号传送标准时间的数字式彩色电视副载波综合器的设计 ,详细介绍了关键电路———数字混频器的组成、工作原理和输入输出波形 .该电路结构简单、性能稳定、可靠性高 .实际应用证明电路的设计是成功的 .该设计思想可以应用于一切输入频率与要求的输出频率之间没有整倍数关系的频率综合电路中 .     

广电系统中的卫星通信应用

卫星通信作为一种新兴的通信方式与光纤通信、数字微波通信一起,成为我国当代远距离通信的支柱.卫星通信在我国的卫星广播电视事业中也起了举足轻重的作用.为使人们对卫星通信产生兴趣,通过介绍卫星通信的优缺点及卫星广播电视系统的主要组成链路,使读者概略地了解其性能、通信方式.对卫星通信事业发展的展望,提出了促进其发展的一些个人想法,科学技术的发展对卫星通信是至关重要的,希望用现代化的先进技术,使我国的卫星电视广播系统跟上时代的步伐.     

改善液晶电视机注塑模点浇口冲击磨损问题

为改善液晶电视机面壳注塑模具点浇口处因长期料流冲击、磨损造成的缺陷,对模具成型面进行局部表面热处理,提高局部材料的硬度和耐磨性。从注塑成型模具浇口结构和对模具材料的分析,说明改善液晶电视机面壳注塑模具点浇口具体处理的方法和产生的效果。     

一种遥控式升降旋转电视机架电气控制系统设计研究

遥控式升降旋转电视机架是医院病房，大型会议中心广受欢迎的机电产品。设计的这一敖电视机架升降行程可以达到300mm，电视机架总成旋转可以达到360°。简要介绍了电视机架的机械结构，详细阐述了该敖电视机架遥控升降旋转的控制功能，并对能够完成这些功能的控制电路作了较为详细的分析。并对其优越性和创新点作了说明。     

液晶电视整机模组一体化结构优化设计

本文主要通过与传统电视结构的简单对比介绍了液晶电视整机模组的一体化结构设计的技术特征，并在原有一体化结构设计的基础上提出了一种优化结构。     

Quantitative analysis of time-course development of motion sickness caused by in-vehicle video watching

It has been common and popular to watch videos in moving vehicles. An important issue in developing comfortable in-vehicle video watching systems is to understand how passengers get motion sickness. With this in mind, the goals of this paper are (1) to introduce an experimental protocol and a statistical analysis procedure for quantitatively evaluating how motion-sickness is developed during car-driving, and (2) to demonstrate their practical usefulness with a working experimental study. In the experimental protocol, motion sickness was induced to subjects by requiring them to watch an in-vehicle video during 15-min driving, and the time-course development of motion sickness was recorded by asking subjects to evaluate their degree of motion sickness every one minute. A main difficulty in analyzing data from these studies is how to incorporate the individual difference in motion-sickness susceptibility. Since susceptibilities are markedly different among subjects, within-subject design experiments are preferred. However, it is practically difficult to conduct complete set of trials because subjects who are not willing to continue experiment (due to heavy motion sickness) should be able to withdraw from the subsequent series of trials in accordance with ethical requirement. To cope with this incomplete data issue, we introduce a statistical data analysis procedure that enables to estimate and impute missing entries in the within-subject design table. Using a working example, we demonstrated that the protocol and the procedure are useful for quantitative assessment of the time-course motion sickness development. We conducted an in-vehicle motion-sickness study with 31 subjects, where the time-course motion sickness developments of video-watching, book-reading, and normal riding conditions were compared. The results indicate that video-watching brings on 2.7 times more severe motion sickness than normal riding, but 25% less severe than book-reading.     

TV2.0时代传统电视的变革及其发展趋势研究

TV2.0是一种全新的电视媒体信息传播理念,它强调收看形式或节目内容的互动性,使观众在看电视的过程中获得参与和分享,达到全新的个人体验,为此探讨了TV2.0时代传统电视的变革及其发展趋势。     

Viewers’ optimization of preferred viewing distance by spatial resolution of TV display

We have shown in a previous paper that preferred viewing distance (PVD)—a viewer’s favored distance from which to watch TV in the home viewing environment—is shorter when watching a high spatial resolution 4k TV than on a high-definition TV (HDTV). PVD depends on (1) the spatial resolution of the viewer’s object of interest in the relevant scene, (2) whether viewers have sufficient time to optimize their PVD, as with still images, and (3) whether they are appropriately encouraged to pay attention to the object at hand on the screen, by, for example, narrative instructions. In this paper, we demonstrate that an analogous result is obtained in a comparison between high spatial resolution 8k TV and HDTV: The PVD of viewers for 8k TV is shorter than that for HDTV. This result suggests new possibilities for high spatial resolution TV, such as novel applications and TV programs that are especially developed for 8k TV systems.