Description: 用VHDL实现视频控制程序(实现对图像的采集和压缩)-Using VHDL video control procedures (the achievement of the image acquisition and compression) Platform: |
Size: 421888 |
Author:huangya |
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Description: 已知两个不同图像块亮度数据如下：
（1）分析DCT原理，采用DCT方法，编程并计算相应的DCT系数，分析系数分布特点。
（2）依据视觉特性分析量化表步长的分布特点，完成DCT系数量化。
（3）采用Z形扫描，实现输出数据的统计编码，形成Video stream。
（4）采用IDCT重建图像亮度数据，计算SAD大小，分析产生误差的原因及采用DCT进行数据压缩的原理。（ ）
（5）分别利用左上角1、3、6个系数重建图像，计算相应的SAD，并由此分析直流和低频系数的重要性。
-Known brightness of two different image data block is as follows: (1) Principles of analysis of DCT, the DCT method, program and calculate the corresponding DCT coefficient, analysis of distribution coefficients. (2) quantitative analysis based on visual characteristics of the distribution of long-form features step-by-step to complete the DCT coefficient quantization. (3) the use of Z-scan output data to achieve statistical encoding, the formation of Video stream. (4) the use of the reconstructed image brightness IDCT data to calculate the SAD size, analysis of the causes of errors and the use of DCT for the principle of data compression. () (5), respectively, a factor of 1,3,6 using the upper left corner of the reconstruction of images, calculating the corresponding SAD, and the resulting analysis of DC and the importance of low-frequency coefficients. Platform: |
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Author:张元 |
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Description: 一个可以在局域网进行视频聊天的源代码，语音压缩采用G729，视频压缩采用H.263，网络传输采用RTP。本程序介绍了视频聊天的基本技术，稍加改动就可以直接运用于Internet网络。-A local area network for video chat in the source code, voice compression using G729, video compression using H.263, network transmission using RTP. This procedure describes the basic skills of video chat, a little change can be directly applied on the Internet network. Platform: |
Size: 565248 |
Author:wlch |
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Description: 数字视频监控系统代表了监控行业的未来发展方向，蕴藏着巨大的商机和
经济效益，成为目前信息产业中颇受关注的数字化产品。特别是近年来，随着
技术的进步和社会经济的不断发展，客观上对监控系统的准确性、有效性和方
便性提出了更高要求。主要体现在：需要实施视频监控的范围更加广阔，达到
点多面广；要求监控系统与管理信息系统、网络系统结合，实现对大量视频数
据的压缩存储、传输和自动处理，从而达到资源共享，为各级管理人员和决策
者提供方便、快捷、有效的服务。可见基于 DSP 和小波压缩技术的远程音频视
频监控具有现实意义和广阔前景。-Digital Video Surveillance System to monitor represents the future direction of the industry, there are enormous business opportunities and
Economic benefits of the information industry has become quite concerned about the digital product. In recent years, with the
Technological progress and socio-economic development, the objective of monitoring system on the accuracy, effectiveness and side
Will be put forward higher requirements. Mainly embodied in: the need for the implementation of video surveillance broader scope, reaching
Points wide require monitoring system and management information systems, network systems, to achieve a number of the large number of video
According to the compressed storage, transmission and automatic processing, so as to achieve resource sharing, for all levels of management and decision-making
Provide convenient, speedy and efficient service. Can be seen based on the DSP and wavelet compression technology as the long-range audio
Frequency of Platform: |
Size: 588800 |
Author:耿耿 |
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Description: 运动估计是视频编码的关键技术，其最基本的原理是利用相邻帧间的时间
相关性，通过预测来减少时间冗余度。在实际编码中，为了节省码率，并不传
输每一帧的全部数据，而是利用运动估计求出每一帧与其预测参考帧之间的差
值。运动估计越准确，差值的分布越趋近与零，差值块的能量越小，经过变换、
量化和熵编码后所产生的码流的比特位率也越少。因此，运动估计搜索的准确
程度直接影响到了编码的压缩性能。
-Motion estimation is the key to video encoding technology, its basic principle is the use of the adjacent time frame relevant, through the forecast period to reduce redundancy. In the actual code, in order to save bit rate and does not transfer all the data of each frame, but the use of motion estimation for each frame obtained with the prediction of the difference between the reference frame. Motion estimation more accurate, more closer to the margin and the distribution of zero, the smaller the energy difference between blocks, after transform, quantization and entropy coding of the code produced by the bit stream bit rate is less. Therefore, the motion estimation search accuracy of the direct impact on the performance of the compression coding. Platform: |
Size: 17408 |
Author:罗鹏 |
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Description: JPEG是当今比较流行的编码标准，能很好的提高视频的压缩比，具有很好的实时性压缩性。-MPEG is more popular in today' s coding standards, the improvement of good video compression ratio, an excellent real-time compression. Platform: |
Size: 63488 |
Author:张峰 |
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Description: 这是一个完整的vc++工程 功能还简单但很好用 其将文件夹里的bmp图片转化为avi视频 可以选择压缩方法等 可以用来学习 也可以自己来制作avi视频等 将自己的照片自己做出视频来 挺好的-This is a complete vc++ project features a simple but very good with its folder into the bmp picture avi video compression methods can choose to study can be used to create your own, such as avi video pictures of their own very good video to make the Platform: |
Size: 475136 |
Author:sunxingxin |
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Description: 视频压缩算法,适用于高压缩网络传输协议 ,在无线公网传输也很适用-Video compression algorithm for high compression network transport protocol in the wireless public network transmission is also very applicable to Platform: |
Size: 5614592 |
Author:zhyo |
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Description: 用MPGE进行压缩编码的变比特率视频流的建模方法介绍和步骤-MPGE compression with variable bit rate encoded video stream modeling methods and steps for introduction Platform: |
Size: 384000 |
Author:王凡 |
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Description: 这本书主要介绍了数字电视技术发展和图像音频压缩的解决方法等-This book discusses the growth of digital television technology and the revolution in image and video compression, highlighting the need for standardization in processing static and moving images and their exchange between computer systems.
Platform: |
Size: 12510208 |
Author:wangmuwang |
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Description: 本文介绍了linux下的video for linux编程和streaming技术，网络视频压缩技术-This article describes the video for linux under linux programming and streaming technology, network video compression technology Platform: |
Size: 208896 |
Author:Bob |
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Description: The latest video compression algorithms - h .264 algorithm can be directly transplanted to DaVinci DM6446 platform, has been validated.
-The latest video compression algorithms- h .264 algorithm can be directly transplanted to DaVinci DM6446 platform, has been validated.
Platform: |
Size: 806912 |
Author:dams |
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Description: 一个用VFW方法来实现视频压缩的程序，实现用H264来压缩。但在使用前要安装合适的播放器，推荐使用完美解码播放器。-A video compression function used VFW mode.It can implement in h264, but it need you to install a suitable video player. Platform: |
Size: 2118656 |
Author:taiyongyu |
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Description: H.264视频压缩编解码在ARM平台上优化的一些资料，对初学H.264压缩算法者有很大的帮助。-H.264 video compression codec on ARM platforms to optimize some of the information on the H.264 compression algorithm for beginners who have a great help. Platform: |
Size: 8494080 |
Author:lien |
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Description: 和H.264标准相关的几个文档，花了不少时间收集起来的，这几个比较有用-several Documents about H.264 video compression, there are many in the internet, but these are relatively useful. Platform: |
Size: 2068480 |
Author:linzhenze |
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Search - video compression