内窥镜影像信息系统中的影像管理实现

针对目前医院内镜检查科的实际项目需求,给出了内镜影像信息系统中的内镜影像管理功能的设计与实现,深入探讨了其中视频录像模块的关键技术实现(包括自定义的JPS视频流格式和基于精确系统采集时钟的录像线程实现)。     

一种基于M-JPEG的视频码流传输方案及其应用

针对现有的Internet通常不支持QoS的现象，提出了一种基于M－JPEG编码格式的自适应Internet视频码流传输方案，及其作为视频传输子系统在视频监控系统中的应用。     

基于VS6724的FPGA视频接口设计及解压缩实现

小体积、低功耗的视频传输系统的设计是包括WBAN在内的许多无线应用的关键技术之一。本文通过将小型手机摄像模块与低功耗的FPGA结合进行基带处理,设计了一种视频图像传输系统,其功耗在0．5W以下,能够在接收端将摄像头压缩的数据通过PC端的解压缩以及连续图像的处理,完成接收数据的图像显示和存储功能。     

Smart Instrumentation in Video Streams Using Real-time Bit-rate Adaptation

With the proliferation of video traffic across the Internet and wireless networks, various compression standards for videos have emerged over the past two decades. Among them, Motion Joint Photographic Expects Group (M-JPEG) offers the advantages of no frame-to-frame error propagation, less computation cost, and achieving a short latency in both encoding and decoding. However, the bit-rate of M-JPEG stream is variable due to its dynamic frame size, and that leads to adverse outcomes such as inducing different quality-of-service (QoS) grades from servers and networks and inducing disturbances in a real-time network environment. This paper proposes a novel approach that can control bit-rate and also the individual frame size of M-JPEG video stream in real-time. Experimental results are provided to show that the proposed approach is amenable to direct, straightforward implementation and yet outperforms similar existing approaches in regulating the bit-rate and the frame size of M-JPEG streams.     

利用PROFILE完成广告自动插播

针对电视台传统模式中广告插播存在的种种弊端,结合当今计算机和数字视频领域的技术发展,提出了利用硬盘录像机PROFILE完成广告自动插播的两个方案,并进行分析比较,得出结论。     

Block-based manipulations on transform-compressed images and videos

This paper addresses the problem of direct image and video manipulation in compressed domain. The capability to perform such manipulations has become attractive in recent years, as more and more visual information is being captured, stored, and moved in compressed form. Our solution to direct manipulation of compressed images and video is based on a set of block-level transforms, called the inner block transforms (IBTs). Each IBT requires a minimal computation effort in compressed domain to yield a regular geometric transformation on an image block. The paper shows how the IBTs can be used to perform many image and video manipulations. This is done by describing the application of IBTs to image subtitling, shearing, and arbitrary angle rotation. The paper also discusses the application of IBT to M-JPEG and MPEG video. The benefits of the proposed direct compressed domain manipulation approach include faster speed, preservation of image quality, and less computing resources.     

非线性编辑系统中的视频压缩技术

在采用压缩方式的非线性编辑系统中，视频质量的好坏取决于视频压缩卡质量和视频压缩技术的选择。目前，M－JPEG，MPEGII和DV这3种视频压缩方式是“非编”主要采用的视频压缩技术，其特点各异，MPEG－2和DV两种格式已有公认的国际标准。介绍了这3种压缩方式的主要特点和应用情况，分析了其在“非编”中应用发展的趋势。     

广州电视台非线性编辑网的研究与实践

介绍了广州电视台非线性编辑网的结构，从视频压缩技术、磁盘阵列技术、网络结构等方面阐述了非线性编辑网络的构成。     

基于USB2.0控制芯片CY7C68013在M-JPEG解码系统中应用

文中给出M-JPEG解码系统硬件实现方案、基于USB2.0规范的控制芯片CY7C68013在M-JPEG解码系统中的应用,编写USB固件程序、USB驱动程序和主机应用程序.     

基于FPGA的M-JPEG实时编码器设计

针对在嵌入式系统中用软件进行压缩编码速度较慢的问题,设计一种基于FPGA的M-JPEG压缩处理结构.该结构充分利用FPGA的特点,提出用一个1D-DCT模块实现2D-DCT变换的新方法,并且根据M-JPEG基本原理,对图像处理算法做了一系列改进,使单幅320×240图像压缩的时间达到8.412 ms,满足了图像压缩的实时性要求.