排序方式: 共有15条查询结果,搜索用时 9 毫秒
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陈力 《数字社区&智能家居》2009,(35)
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)。 相似文献
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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。 相似文献
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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. 相似文献
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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。 相似文献
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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. 相似文献
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非线性编辑系统中的视频压缩技术 总被引:2,自引:1,他引:1
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。 相似文献
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