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台标(Logo)又称台徽,是电视播出时,叠加在节目内容上的徽标。台标既方便用户收看时选台,同时也代表了一个电视台的形象。时标是指叠加在节目内容上的时钟,是给电视观众的时间提示。随着我国广播电视业的飞速发展,国内越来越多的电视台节目开始采用卫星直播,考虑到电视台播出形象和节目防盗版等因素,台标的优劣日益显得重要起来。 电视台传统的台标发生器(Logo Generator)功能比较简单,一般仅能显示16色或256色图像,无半透明效果,无法适应电视台高质量的播出要求。博汇公司经过长期研制,开发了博汇新一代真彩色数 相似文献
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本文通过对CTSB-95与TSB-Ⅲ中视频电路的对比以及三种芯片的介绍与分析,提出对箝位电路和混合电路的几点改进。 相似文献
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李宇 《电子技术与软件工程》2021,(5):90-91
本文介绍了一种基于国产图形处理器的视频叠加显示系统设计,具备小型化、效率高等特点。该系统采用一款国产图形处理器JARIG12,将外部的雷达、电视视频数据通过图形处理器的视频输入端口直接送入图形处理器内部,在图形处理器内部完成视频的叠加处理,最后进行输出显示。 相似文献
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本文主要介绍Blackfin处理器及其视频应用产品范例,典型嵌入式数字视频系统的构成,Blackfin处理器的内部视频特性,以及应用架构构建考虑等内容。 Blackfin处理器简介 相似文献
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数字电视系统在提高图像质量方面已显示出极大的优越性。因此,世界各国电视台都已开始数字化的进程,中国也不例外。本文详细介绍了中央电视台第一个数字化演播室-800m^2演播室的视频系统,包括视频系统数字信号格式的确定,主要设备的特点以及演播室数字视频系统的主要特点等,供广大同行参考。 相似文献
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本文介绍采用8031单片微机产生电视台、时标的方法。文中详细介绍了台、时标发生器的硬件构成以及台、时标形成和与视频信号叠加的原理,并画出各部程序流程图。程序分为五大模块。 相似文献
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本文介绍了一种在市级有线数字电视平台下传的数字电视节目中进行台标字幕叠加的方法。对市级有线数字电视下传的射频信号。采用带阻滤波方法,对选取的频点节目。通过解调、解扰,实行TS流层面的台标字幕叠加,并经64QAM调制后,恢复原平台下传的有线数字电视系统信号的传输。系统稳定可靠。成本大大降低。 相似文献
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1概述在电视监控系统中,因切换的视频信号较多,操作者很难快速判别某一图像来自何处,故需要在图像上叠加地点信息,如摄像机号或汉字地名。要录像存档的图像还要叠加上日期。时间,常常是年、月、日。时、分、秒显示,有时也可能需要对某事件进行计时或倒计时。在报警系统中,更要叠加上报警信息,包括报警的类型、开始时间和地点。有的工矿企业的现场监控要求叠加诸如温度、湿度、有害气体浓度等各种各样的信息。为能对图像上显示的多种信息快速反应,最好各种信息用不同颜色显示。比如报警信息用红色显示,地点信息用绿色显示,时间用… 相似文献
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Software mechanisms that make use of analog transmission and storage of video for computer-controlled video communication and file storage are described. The authors extended the Etherphone voice management system to support video conferencing and file storage. The software mechanisms for conference management consist of a central connection manager, and video and user interface agents running on client workstations. A conferencing architecture that supports multiplicity in the number of conferences and media is presented. The video file server stores and retrieves full-motion video information within conferences. It uses optical disks to store video frames and builds a high-level file and directory interface. The user interface to the directory interface is a multimedia document editor that permits video annotations to be freely interspersed with text. The performance of the system, which spans multiple media networks, has been highly satisfactory 相似文献
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Chang-Li Lin Sheng-Uei Guan 《Communications Magazine, IEEE》1996,34(1):86-91
The authors describe a video-on-demand system that uses personal computers with LANs, making it possible to offer video services with low cost and a wide range of applications. This design approach brings down the cost and may find a wider scope of application in the future. Our research focuses on the underlying software architecture for video library services. We assume the existence of an adequate operating system (OS), network and disk support. We survey related VOD research, introduce services supporting video library, and cover the system architecture and design. We discuss the architecture of our video library server and clients; describe our system implementation, and examine future directions 相似文献
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随着科技不断发展,我国的公共安全领域也在不断加强科技化水平改革,使用更好的科技产品进行工作辅助,为社会稳定,人们生活安全提供保障。警务视频实战应用平台就是综合应用多项先进技术的科技辅助平台。本文通过笔者多年的公安工作经验进行需求分析,并对警务视频实战应用平台进行功能分析,对如何使用该平台更好的开展警务工作并提出一些建议,望与业内同仁交流学习,能更好的促进视频技术在公共安全领域发光发热,提高公安指挥调度的信息化水平。 相似文献
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During the multi-view video acquisition, color variation across the views tends to be incurred due to different camera positions, orientations, and local lighting conditions. Such color variation will inevitably deteriorate the performance of the follow-up multi-view video processing, such as multi-view video coding (MVC). To address this problem, an effective color correction algorithm, called the SIFT flow-based color correction (SFCC), is proposed in this paper. First, the SIFT-flow technique is used to establish point-to-point correspondences across all the views of the multi-view video. The average color is then computed based on those identified common corresponding points and used as the reference color. By minimizing the energy of the difference yielded between the color of those identified common corresponding points in each view with respect to the reference color, the color correction matrix for each view can be obtained and used to correct its color. Experimental results have shown that the proposed SFCC algorithm is able to effectively eliminate the color variation inherited in multi-view video. By further exploiting the developed SFCC algorithm as a pre-processing for the MVC, extensive simulation results have shown that the coding efficiency of the color-corrected multi-view video can be greatly improved (on average, 0.85 dB, 1.27 dB and 1.63 dB gain for Y, U, and V components, respectively), compared with that of the original multi-view video without color correction. 相似文献