key compression 中文意思是什麼

key compression 解釋
關鍵字壓縮
  • key : n 1 鑰匙。2 要害，關口，要沖。3 關鍵，線索，秘訣；解法。4 （外國書的）直譯本，圖例，題解，圖解，...
  • compression : n. 1. 壓縮；壓緊；濃縮，緊縮。2. 加壓；壓抑。3. （表現的）簡練。4. 應壓試驗。
  1. Video compression plays an important role on digit moving picture processing, since it affects the picture ' s quality, comprcssing rate and visual degree in video sequence. adopting the same aphesis on the different objects, this approach which has employed by mpeg - 2 standard has led to a blur image of key objects, especially for those of the human faces

    視頻壓縮是數字視頻處理的關鍵技術，其決定了圖像的質量、壓縮率和對象的可分辨性，但是目前的mpeg壓縮演算法將不同圖像對象以相同的方式處理使視頻圖像中的關鍵對象信息無法清晰表達。
  2. When we designed the system, we considered some key factors such as the system must deal with and store a great deal video and audio data, the capability of the hard disk in the server and client, hi the part of video compression, we choose the currently mpeg - 4 video constringent card to complete the collecting and compression of the video and audio signals

    在論文研究與實用系統設計中，充分關注到大量視音頻數據的處理、存儲以及服務器和遠程客戶端的硬盤容量等關鍵因素，視音頻壓縮採用了最新的mpeg - 4視音頻壓縮卡進行視音頻信息的採集和壓縮。
  3. Presenting a new concept of authentication chain. 2. introducing a asymmetry key into authentication algorithm, especailly in the loss compression field algorithm, to enhance more security

    提出將用非對稱密鑰演算法應用於認證演算法特別是有損壓縮域的認證演算法之中，因此極大提高了所設計演算法的安全性。
  4. The basic characteristics of the current data network are point - to - point, connectless, doing one ' s endeavor, no quality of service, etc. these characteristics do not meet the requirement of real - time services, therefore, the realization of voip need support of the some key technology. these technologies includes : speech sound coding and data compression, real - time transmission and control, mute compression and multicast, acoustic - echo cancellation and comfort noise generator, dynamic monitor and guarantee of quality of network service, as well as, the compatible of different network and different protocol with each other

    但現有的數據網路的基本特性：點對點的、無連接的、盡力而為的、沒有服務質量保證等特性並不適合與實時的業務要求，因此voip的實現需要一些關鍵技術的支持，這些技術包括：語音編碼和壓縮技術、實時傳輸和控制技術、組播技術、靜音壓縮和舒適噪聲生成技術、回聲消除技術、網路服務質量的動態監測和保證技術、以及不同的網路、不同的協議之間的互連互通等等。
  5. Rate - distortion analysis and rate control play a key role in video coding and communication systems by providing the rate - distortion optimized compression performance, assuring the successful network transmission of the coded video data, and achieving the best visual quality at the receiver

    為了取得最優化的壓縮效率，確保編碼數據在通道成功傳輸，並在接收端獲得最佳的視頻質量，率失真優化和碼率控制技術具有重要的地位。
  6. Large time - band product signals such as linear frequency modulation signals ( lfm ), nonlinear frequency modulation signals ( nlfm ), phase coded signals and so on are one of key technologies for pulse compression radar systems

    具有大時寬帶寬積的信號，如線性調頻信號、非線性調頻信號、相位編碼信號等是雷達應用脈沖壓縮技術的關鍵之一。
  7. Context modeling is a key point in compression algorithm designing

    Context模型是無損壓縮演算法設計中關鍵部分，它對演算法壓縮性能至關重要。
  8. This paper focuses on the research and implementation of these six key techniques. firstly, this paper researches the international standards for compression of digital video data, analyses how to compress analog video stream to mpeg - 4 with hardware. it is also involved in the techniques of net transmit of digital video data, such as net protocol, ip multicast, rtp / rtcp and so on

    本文主要是對智能視頻監控系統關鍵技術的研究與實現，主要體現在以下幾個方面: 1 、在視頻數據的壓縮方面，研究與分析了視頻壓縮的標準以及對mpeg - 4壓縮標準做了簡單的介紹，並分析了mpeg - 4的硬體實現方式，即使用硬體編碼晶元vw2010將視頻信號轉換為mpeg - 4格式的視頻流。
  9. Some novel enhancing morphologic translation algorithms such as mark, areaselect, bylsland, island are implemented in the experiment of this thesis. and what ' s more, making full use of overlapping movement compensation, embedded zerotree wavelet translation encoding and contend - based wavelet translation, this thesis has achieved the human - face - central video compression of the key objects

    實驗中提出了一系列新型增強形態變換演算法，如mark 、 areaselect 、 byisland 、 island等，並且將交疊運動補償、零樹小波編碼、基於內容的小波變換等有機地結合起來，實現了基於人臉關鍵對象的視頻壓縮。
  10. Combining with the practical project, the development of an instrument for multi - channel harmonic detection and analysis were described in the third chapter, including the system structure, hardware and software of the device. then the technology of multi - channel data gathering was discussed, and some key techniques have been presented including high precision 、 high speed sampling of the voltage and current, fast flourier transform ( fft ), data compression and storage techniques, planar graphic fitting, three dimensional graphic projection, multithreading and the computer graphics techniques

    第三章結合多通道諧波監測及故障錄波一體化裝置的研製這一課題，介紹了裝置的體系結構和硬體、軟體構成，詳細介紹了在裝置研究過程中所提出的關鍵技術，主要包括電流電壓信號高精度、高速采樣技術，快速傅立葉變換fft 、數據壓縮存儲技術，多線程技術，二維圖形擬合、三維圖形投影技術及海量存儲技術，計算機圖形技術等。
  11. After the historical background of video compression technology being introduced, some key compression algorithms are then proposed. then, kinds of error control technologies such as resilient coding, error concealment, and feedback - based error control methods are introduced. also our settle method is given

    首先，本文視頻壓縮技術的發展歷程，介紹了一些關鍵的視頻壓縮技術；然後重點介紹了各種錯誤控制技術，包括基於編碼端的，解碼端的以及基於反饋的錯誤控制技術，並且提出了自己的一些方法；然後介紹了一個基於手持設備的視頻系統，並給出了採用的錯誤控制方法，做了數據模擬和分析。
  12. Currently, transforming coding is one of the most used approach for image coding, where the discrete cosine transform ( dct ), the discrete wavelet transform ( dwt ), and the lapped biorthogonal transform ( lbt ) are widely utilized. how to reduce the complexity of these discrete transforms, is the key technique to image compression. in this thesis, a type of lapped biorthogonal transform which can map integers to integers is considered

    變換編碼是圖像壓縮中的主流方法，其採用的主要變換有離散餘弦變換、離散小波變換、雙正交疊式變換，如何減少這些離散變換的計算復雜性，一直是圖像壓縮研究的重要課題。
  13. The key technology of digital video surveillance systems is compression of digital video data

    數字視頻壓縮技術是數字視頻監控系統的關鍵技術。
  14. There are two key technologies in streaming video. the first one is video compression technology, without high efficient compression, video transmission on network is impossible

    流式視頻技術有兩個關鍵技術，一個是視頻壓縮技術，沒有高效的視頻壓縮技術，基於網路的視頻傳輸幾乎不可能實現。
  15. With these foundation, the paper puts forward several solution schemas of key technologies in mois, such as 3 - tiers system architecture optimization, binary file compression & encryption, tree relationship data process, active notice delivery mechanism and network environment adaptability, and makes some ex ploring research about intelligent software agent and text mining technology

    在此基礎上，給出了若干mois關鍵技術的解決方案，包括三層體系結構優化方案、二進制格式文件壓縮加密方案，層次化關系數據的處理技術、主動式通知傳遞機制和網路環境適應性方案等，並對智能軟體代理和文本挖掘技術作了探索性研究。
  16. In view of above problems, this article studies the key technology of mass data processing system, and design a system framework point to the triangle mesh data, which is made up of millions series of triangles. this framework resolves the problem that a computer could not read all the mass data into its storage and process them through data block partion, and also reduces the space that mass data occupies in hd by data compression

    針對以上問題，本文研究了海量數據處理系統的關鍵技術，針對由百萬級數量的三角形構成的三角網格數據，設計了一個系統框架，通過數據分塊解決計算機不能把海量數據全部讀入內存進行處理的問題，通過數據壓縮解決海量數據佔用大量硬盤空間的問題。
  17. At the beginning, this paper has some brief dissertation on the basic principle of the dsl and the multimedia data compression, the key technique of sdsl, the transport protocols, and the data transfer system structure based on the twisted - pair. then it gives an analysis of the point - to - point data link protocol ( ppp ) and the real - time transmission protocol in detail, which provide the side - to - side transmission service for audio frequency and video frequency data, and so on based on the these, we developed a multimedia sdsl modem system used to transfer data and phonetic

    本文首先對dsl系統和多媒體數據壓縮技術的基本原理、 sdsl的關鍵技術、傳輸協議以及基於雙絞線的數據傳輸系統的結構進行了簡要的論述，並詳細分析了點到點的數據鏈路協議（ ppp協議）以及實時傳輸協議，其為音頻、視頻等實時數據提供端到端的傳送服務。可以向接收端傳送恢復實時信號必需的定時和順序信息，並向收發雙方和網路運營者提供qos監測手段。
  18. The key issue of improving the wavelet compression performance is how to efficiently organize the wavelet coefficients and to describe the information of image

    如何有效地利用小波分解系數更好地表示圖像信息是提高圖像壓縮性能的關鍵。
  19. With performance of up to 900 million floating - point operations per second ( mflops ) at a clock rate of 150 mhz, tms320c6711 is fit to tackle with the problem. this thesis made a deep research on the h. 263 standard and the tms320c6711. we propose the plan of the software and the hardware for the realization of the h. 263 protocol which include the structure of the whole program, the c code of the key algorithm of the h. 263, the c code of some subprogram, and the circuit for image processing with the tms320c6711 as the processor. furthermore, we optimize some subprogram in common use to make the coding more quickly. we encode a video sequence with the tms320c6711dsk successfully, even if the compression rate is as high as 100, video effect we get after decoding the code stream is satisfying

    首先系統地研究了h . 263協議編碼器的基本演算法，句法，碼流結構和tms320c6711dsk的原理結構以及ccs2 . 0的開發環境；在系統的軟體方面給出了總體流程圖，對于h . 263協議編碼器的某些核心演算法和子程序，給出了部分源代碼，對于dsp的各種代碼優化方法進行了討論，並且對代碼進行優化，從而在提高系統處理速度的同時減少代碼大小和內存需求量；硬體方面以tms320c6711為核心處理器，提出了基於tms320c6711的圖像處理平臺的硬體實現方案，並給出了原理電路圖；最後在tms320c6711dsk上成功對視頻數據進行高壓縮比（ 100倍以上）的編碼，對回傳的結果解碼后得到了令人滿意的效果。
  20. In order to get high quality voice in spite of low - bandwidth, our system uses several kinds of voice compression algorithms, and it realizes the functions of voice activation and jitter compensation. on the other hand, we use some methods to make voice communication safe. the methods includes : filling traffic, encrypting voice datagram with conventional encryption algorithms ; encrypting session key with asymmetric encryption, multiple authentication

    為了保證通信鏈路不被分析，系統實現了一個通信量填充器；為了對傳輸中的語音數據包進行加密，系統提供了des 、 idea 、 blowfish和keyfile等各種常規加密方法；為了利用對稱加密的快速性和公開密鑰加密的方便性，系統只對會話密鑰進行公開密鑰加密。
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