数字电视广播的业务信息

介绍数字电视广播中采用的业务信息，业务信息的数据结构以及开展数字电视业务必须用到的数据描述符，使用业务信息应注意的事项进行了论述，并提供了一种利用业务信息实现多通道电子节目指南的方法。     

EPG信息下传及本地节目的加入

本文介绍了EPG电子节目指南系统在烟台有线数字电视传输系统中的应用，对EPG信息向各县市下传以及各县市本地自办节目的加入进行了重点阐述，并提出了一种充分利用一套电子节目指南系统实现不同区域节目导航的有效方案。     

浅谈如何在EPG中添加节目及排序

本文详细介绍了在数字电视子系统EPG中如何添加节目。并用频道号描述符为已添加的节目进行排序。     

视频广播、视频点播和视频会议

视频广播、视频点播和视频会议都是视频应用的方式。 视频广播是基于ＩＰ组播技术的一种单向、一对多的广播服务，它带宽耗费小。对于每个节目，由于只发送一个视频数据流，因而理论上能够支持无限用户对节目的收看，比较适合大量观众的视频应用，是一种经济有效的视频应用。视频点播是一种一对一传输、双向、不对称的视频应用。允许用户随时请求收看节目，对每一个节目请求都需要占用一个单独的数据流，而与收看者点播的节目无关，从视频点播服务器向用户端传输的视频数据量远远大于反向的点播请求传输的信息数据量，应用带宽耗费较大。视…     

业务信息私有描述符在吴江数字电视中的应用

结合吴江数字电视建设,介绍了业务信息表中插入自定义私有描述符,实现数字电视节目相关控制的可行性解决方案。     

高清视频播放的硬件配置--HTPC篇

上回我们为大家介绍了HDTV视频的概念以及获取、播放HDTV视频的一般方法。目前在国内获取HDTV视频节目的方法，主要有通过接收高清数字卫星广播和通过互联网两种途径，这两种途径所获取的节目文件格式基本相同，但接收及回放所需的硬件设备却有很大的区别。本文讨论的是播放通过互联网下载的HDTV视频文件所需的硬件配置——HTPC。     

黑龙江农垦电视局非线性编辑站组网

非线性编辑站，作为视频节目的一种编辑工具，受到视频编辑工作的推崇。农垦电视局在使用非线性编辑站以来，一直是单站独立工作。由于新闻的时效性、节目的重复上载和节目资源不能共享、节目配音等问题，是非编站工作效率低下的主要原因。节目资源从一台非编站移到另一台非编站，必须经过下     

面向在线制作的集群转码系统设计

根据广域网环境的在线节目制作系统的需求,设计了一种集群转码系统。该系统采用基于Condor的集群运算调度机制,结合对视频数据的有效分割,完成多运算节点同时对一个节目素材的转码计算。重点介绍了集群转码系统的总体设计思路以及实现方式,包括软件部分任务生成、转码程序、结果生成等模块的实现细节。系统测试数据说明了集群系统中视频分割大小以及集群节点数目等关键因素对系统运行效率的影响。     

一种适合县级电视台的播控系统

本文介绍了一种适合于县级电视台的播控系统，可实现八路输入节目的视频，音频处理，分配、切换，校正，输出两路自办及转换节目；并实现台标，时标显示，游动字幕播出功能，配有应急设备，且能灵活改变配置应用于播控。     

视频节目数字化系统构成及性能研究

主要阐述了一般视频节目数字化系统的构成，并从系统的压缩编码、存储方式进行必要的性能分析，提出一种简单、经济的视频节目数字化系统的构成方案。     

基于模板匹配的马赛克视频检测方法研究

通过分析普通图像和马赛克图像的特征,提出了一种简单的、高实时性的马赛克检测方法,利用模板匹配方法快速检测出画面中的马赛克缺陷。     

Super-resolution mosaicing from MPEG compressed video

In this paper we address the problem of mosaic construction from MPEG 1/2 compressed video for the purpose of video browsing. State-of-the-art mosaicing methods work on raw video, but most video content is available in compressed form such as MPEG 1/2. Applying these methods to compressed video requires full decoding which is very costly. The resulting mosaic is in general too large to display on the screen and is thus inappropriate for the purpose of video browsing. Therefore, we directly extract very low-resolution frames from MPEG 1/2 compressed video for the mosaic construction and then apply a super-resolution (SR) method based on iterative backprojections in order to increase the mosaic resolution and its visual quality. Global motion to be used in the SR method for aligning and warping the frames is estimated from motion information contained in the compressed stream. We also use the estimated global motion in the blur estimation and in the choice of the degradation model used for the restoration in the SR algorithm. The method for the SR mosaic construction from MPEG 1/2 compressed video that we present in this paper is less costly than mosaic construction from full decoded video. Furthermore, the resulting mosaic size is more appropriate for the purpose of video browsing.     

车辆视频监控系统的构建及设计要点

针对客：运/货运车辆的车载无线视频监控系统是车联网技术的一个发展方向,通过该系统,除了可以监控车辆的移动轨迹和运行情况外,还能够实时获取车内以及道路的音视频信息,对公交客运、交通管理、运政执法、银行押运等行业的支持尤为重要。针对移动多媒体数据流的传输问题从传输效率和传输质量这两方面进行了分析,介绍了一种车辆视频监控系统的组织架构,并针对设计要点进行了阐述。     

基于嵌入式视频服务器的综合监控系统

基于嵌入式视频服务器的综合监控系统以Internet为依托,引入模块化设计,突破了传统监控系统在监控地点上的限制,可以方便地实现异地监视和控制。介绍了嵌入式视频服务器以太网接口、视频处理、微处理器、远程控制、微处理器软件开发等几个组成模块。基于嵌入式视频服务器的综合监控系统可广泛应用于电信、银行、智能大厦、家庭的远程监控等领域。     

TMS320DM642在视频拼接系统中的应用

提出一套基于TMS320DM642的视频拼接系统,对视频拼接技术、系统的硬件资源选择和工作流程等关键问题进行了详细的讨论.实验结果表明,视频拼接系统可以获得一个满足要求的高分辨率、无缝且大视场图像.     

New methods for dynamic mosaicking

This paper presents a new technique for the creation of a sequence of mosaic images from an original video shot. A mosaic image represents, on a single image, the scene background seen all over the sequence and its creation requires the estimation of the warping parameters and the use of a blending technique. The warping parameters permit one to represent each original image in the mosaic reference. An estimation method, based on a direct comparison between the current original image and the previously calculated mosaic is proposed. A new analytic minimization criterion is also designed to optimize the determination of the blending coefficient used for the update of the mosaic image with a new original image. This criterion is based on constraints related to the temporal variations of the background, the temporal delay and the resolution of the created mosaic images, while its minimization can be analytically performed. Finally, the proposed method is applied to the creation of new video sequences in which the camera point of view, the camera focal, or the image size are modified. This approach has been tested and validated on real video sequences with large camera motion.     

一种无人机航拍高清影像快速拼接方法

该文研究了一种无人机航拍高清影像快速拼接方法,主要包括路线规划、视频特定帧抽取、帧图像拼接三步.其中,为得到较精确的对地分辨率,对实验场景进行路线规划;为解决无人机影像冗余帧信息量大的问题,提出了一种基于目标场景和无人机飞行状态参数的抽取算法;为解决配准阶段的耗时问题,用SURF算子仅在重叠区域内进行图像配准,减少配准用时.实验表明,该方法基本达到实时性要求,且拼接图像的视觉效果较好.     

Near Real-Time Orthorectification and Mosaic of Small UAV Video Flow for Time-Critical Event Response

A method for real-time mosaic of video flow acquired by a small low-cost unmanned aerial vehicle (UAV) has been presented in this paper. The basic procedures of real-time mosaic are as follows: 1) Each video frame is resampled and orthorectified using a developed mathematical model, which can simultaneously solve the video camera's interior orientation parameters and the exterior orientation parameters of each video frame; 2) each orthorectified video frame is mosaicked at real time. A test field located in Picayune, Mississippi, has been established for testing our method. Sixty-minute video data were collected using the UAV and were processed using the proposed method. The results demonstrated that each video frame can be geo-orthorectified and mosaicked together to produce a 2-D planimetric mapping at near real time. Accuracy of the mosaicked video images (2-D planimetric map) is approximately 1–2 pixels, when compared to 55 checkpoints, which were measured by differential GPS surveying.      

Two-dimensional mesh-based mosaic representation for manipulationof video objects with occlusion

We present a two-dimensional (2-D) mesh-based mosaic representation, consisting of an object mesh and a mosaic mesh for each frame and a final mosaic image, for video objects with mildly deformable motion in the presence of self and/or object-to-object (external) occlusion. Unlike classical mosaic representations where successive frames are registered using global motion models, we map the uncovered regions in the successive frames onto the mosaic reference frame using local affine models, i.e., those of the neighboring mesh patches. The proposed method to compute this mosaic representation is tightly coupled with an occlusion adaptive 2-D mesh tracking procedure, which consist of propagating the object mesh frame to frame, and updating of both object and mosaic meshes to optimize texture mapping from the mosaic to each instance of the object. The proposed representation has been applied to video object rendering and editing, including self transfiguration, synthetic transfiguration, and 2-D augmented reality in the presence of self and/or external occlusion. We also provide an algorithm to determine the minimum number of still views needed to reconstruct a replacement mosaic which is needed for synthetic transfiguration. Experimental results are provided to demonstrate both the 2-D mesh-based mosaic synthesis and two different video object editing applications on real video sequences.     

一种雷达视频信号模拟器的设计与实现

分析了雷达视频信号模拟器的体系结构、功能,重点介绍了一种雷达视频信号模拟器的设计与实现。该模拟器采用工业控制计算机插装高性能的信号处理板和实时信号输出板的结构,应用外围设备连接（PCI）总线和现场可编程门阵列（FPGA）等技术,具有极大的灵活性和通用性。