Description: 视频捕获和传输程序，实现简单的视频捕获和传输，用delphi实现。-video capture and transmission procedures, a simple video capture and transmission, with delphi achieve. Platform: |
Size: 546816 |
Author:ben |
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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: 美国atsc数字电视标准，详细介绍了ATSC 术语，信号定义，信号标准，信号传输过程及音视频解码，及PID数据结构等等。-U.S. atsc digital television standard, ATSC detailed terms, the definition of signal, signal standards, signal transmission and audio and video decoding process, and PID data structure and so on. Platform: |
Size: 1700864 |
Author:richard WAN |
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Description: 正交频分复用技术是近年来发展起来的新技术,在高速无线数据传输领域有很大的应用前景。文章在分析和总结相关文献的基础上,介绍了正交频分复用(OFDM)技术的发展历史,讨论了正交频分复用技术的基本原理和实现方法。通过分析表明,在高速无线通信中OFDM对于消除符号间干扰(ISI),降低系统的复杂度等方面具有很大优势。正交频分复用(OFDM)是一种多载波宽带数字调制技术,它能有效地克服传输中的多径干扰和消除码间串扰,适合于高速率的地面信道视频传输。本文就OFDM技术进行了较为详尽的分析,并对OFDM的传输特性进行了基于FFT算法实现的MATLAB软件模拟及模拟结果分析。 -OFDM is a new technology developed in recent years, high-speed wireless data transmission in the field of great applications. This paper analyzes and summarizes the basis of relevant literature, describes orthogonal frequency division multiplexing (OFDM) technology, history, orthogonal frequency division multiplexing discussed the basic principles and implementation methods. The analysis shows that in the high-speed wireless communication in OFDM symbol for the elimination of interference (ISI), and so reduce the complexity of the system has great advantages. Orthogonal frequency division multiplexing (OFDM) is a multi-carrier wideband digital modulation techniques, can effectively overcome the transmission of multi-path interference and the elimination of intersymbol interference, the ground for high-speed video transmission channel. In this paper, OFDM technology, a more detailed analysis, and transmission characteristics of OFDM FFT algorithm based on the MATLAB software simulation Platform: |
Size: 71680 |
Author:罗萍 |
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Description: 通信的数字化是它能与计算机技术和数字信号处理技术相结合的基础，而实现通信数字化的前提是信源能提供的各种用于传递的消息，例如语音、图像、数据、文字等都必须以数字化形式表示。而信源编码是数字通信系统中的重要组成部分，他是保证信号有效传输的一种重要方式。霍夫曼编码依据字符出现的概率来构造异字头的平均长度最短的码字，有时称之为最佳编码，其优越的性能被广泛使用在数字通信系统中。霍夫曼编码已经成为数据压缩的灵魂算法。本文介绍了无失真编码算法的构造，霍夫曼编码的规则和特点，同时分析了对信源进行优化的方法，最后通过MATLAB仿真来讨论比较二元霍夫曼编码、三元霍夫曼编码以及信源扩展编码的效率，来实现霍夫曼码的优化构造。-The digital communication is it can and computer technology and digital signal processing technology in combination of the base, and realize the digital communication is the premise of source can provide all kinds of used to deliver news, such as voice, video and data and text must take the digital form said. And the source coding digital communication system is the important component, he is to ensure the effective transmission signal is an important way. Huffman coding based on the probability of characters appear to construct different "the average length of the shortest code words, sometimes called the best coding, superior performance is widely used in digital communication system. Huffman coding has become the soul of data compression algorithm. This paper introduces the structure of the encoding algorithm without distortion, Huffman coding rules and characteristics, and analysis of the source of the optimization method, and finally by MATLAB simulation to discuss compares two yu Platform: |
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Author:郑华 |
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Description: Video summarization refers to creating a summary of a video. Medical examinations like endoscopy and bronchoscopy lasts more than 20 minutes .The doctor may not have sufficient time to watch the entire video or the whole of video content may not be of interest to the examiner. Sometimes the medical video has to be sent to a specialist who is located at a distant place. In such cases, the doctor may just want to view the summary of the video instead of watching the whole video. Thus , the summary should be such that it should convey as much information about the occurrence of various incidents in the video.
Video summarization plays an important role in efficient storage, quick browsing and retri of large collection of video data without losing important aspects. It also reduces transmission bandwidth efficiently when need arises. Efficient summarization of video recordings of bronchoscopic and endoscopic procedures is also highly relevant for the development of medical video libraries.
Video summarization refers to creating a summary of a video. Medical examinations like endoscopy and bronchoscopy lasts more than 20 minutes .The doctor may not have sufficient time to watch the entire video or the whole of video content may not be of interest to the examiner. Sometimes the medical video has to be sent to a specialist who is located at a distant place. In such cases, the doctor may just want to view the summary of the video instead of watching the whole video. Thus , the summary should be such that it should convey as much information about the occurrence of various incidents in the video.
Video summarization plays an important role in efficient storage, quick browsing and retri of large collection of video data without losing important aspects. It also reduces transmission bandwidth efficiently when need arises. Efficient summarization of video recordings of bronchoscopic and endoscopic procedures is also highly relevant for the development of medical video libraries.
-n refers to creating a summary of a video. Medical examinations like endoscopy and bronchoscopy lasts more than 20 minutes .The doctor may not have sufficient time to watch the entire video or the whole of video content may not be of interest to the examiner. Sometimes the medical video has to be sent to a specialist who is located at a distant place. In such cases, the doctor may just want to view the summary of the video instead of watching the whole video. Thus , the summary should be such that it should convey as much information about the occurrence of various incidents in the video.
Video summarization plays an important role in efficient storage, quick browsing and retri of large collection of video data without losing important aspects. It also reduces transmission bandwidth efficiently when need arises. Efficient summarization of video recordings of bronchoscopic and endoscopic procedures is also highly relevant for the development of medical video libraries.
Platform: |
Size: 1024 |
Author:Savi |
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Description: Analog transmission. Analog transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. ... Others define that as digital transmission and as a digital signal. Platform: |
Size: 616448 |
Author:khang
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