rate distortion 中文意思是什麼

rate distortion 解釋
速率失真
  • rate : n 1 比率，率；速度，進度；程度；（鐘的快慢）差率。2 價格；行市，行情；估價，評價；費，費用，運費...
  • distortion : n. 1. 歪扭，扭曲。2. 【電學】（信號、波形等的）失真；【物理學】（透鏡成像產生的）畸變；【醫學】扭轉，變形。3. 竄改，歪曲，曲解。adj. -al
  1. The emphasis of this thesis is studying the methods of bit allocations of digital image compression based on wavelet transform and managing to minimizing the overall distortion. we know from the rate - distortion theory that the aim is gainable

    由率失真理論我們知道，對于給定的碼率，可以找到一種比特分配演算法對小波變換后的各個子帶進行比特分配，使重建圖像的失真達到最小。
  2. Second, an adaptive rate - distortion model is proposed by extending directed acyclic graph model for fine granular scalable video coding. we add rate, original distortion and adaptive scale to the directed acyclic graph model

    其次，針對精細粒度可擴展視頻編碼技術，本文擴展有向無環圖模型，在該模型中加入碼率，原始失真和自適應因子等屬性，建立了自適應率失真模型。
  3. 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。
  4. Scalable video coding ( such as mpeg - 4 fgs and jvt svc ) and streaming is one of the most promising technologies. in this thesis, we investigate the key problem of scalable video coding and streaming : rate - distortion analysis and approximation, with which we also design some simple and effective smooth quality reconstruction algorithms of video streaming

    本文主要的內容和創新點包括:由於廣義高斯分佈ggd （ generalizedgaussiandistribution ）的高度靈活性，理論上和實際中它都可以非常好地描述離散餘弦變換（ dct ）和小波變換（ wavelettransform ）的編碼系數（ transformcoefficients ） 。
  5. The rate - distortion function, and source coding theorem

    率失真函數和信源編碼定理。
  6. The present paper presents a new method for constructing optimal quantisation tables. the method produces optimal rate - distortion performance in a fixed block size dct

    摘要提出一種構造擇優量化表的新方法。在一個固定塊尺寸的離散餘弦變換（ dct ）中，該方法可產生優化的率失真特性。
  7. The error propagation path is changed because that the different substream sets are selected for specific spatial and temporal resolution, but this rate - distortion model is adaptive with different error propagation paths. we can easily estimate the distortion at different error propagation situation

    盡管在復雜的可擴展視頻編碼技術中，誤差傳遞路徑會隨著選擇播放的子碼流集不同而變化，本文建立的模型卻能夠自適應誤差傳遞路徑的變化，估計出較為準確的失真信息。
  8. The proposed md mesh - based motion coding methodis then combined with the pairwise correlating transform, and acomplete md video coding scheme is proposed. further measures are takento reduce the mismatch between the encoder and decoder that occurs whenonly one description is received and the decoder reconstruction isdifferent from the encoder. the performance of the proposed scheme isevaluated using computer simulations, and the results show, compared toreibman s md transform coding mdtc method, the proposed schemeachieves better redundancy rate distortion performance

    數據重傳必然會引起延遲，因而在需要很短延遲的應用中是行不通的，如雙向無線通信同時在以廣播方式進行數據傳輸時也是行不通的當有大量突發錯誤時，糾錯碼如分組糾錯碼block code及卷積碼convolutional code無法在不產生額外延遲及需要額外運算的前提下對數據提供足夠的保護而錯誤掩蔽的性能則受接收到數據與丟失數據之間的殘留相關性大小的影響。
  9. In the simulation, the redundancy - rate - distortion performance is analyzed, and results prove that this mdc has a better reconstruction performance than conventional single description coder ( sdc ) in error - prone environments

    在模擬中，對該框架的冗餘率失真性能進行了分析，結果表明：該多描述視頻編碼方法在易錯環境中的性能優于傳統的單描述編碼方法。
  10. By reducing the calculational complexity of the rate - distortion slope estimate and simplifying the design of optimized truncation and tag tree encode in code stream organization, the difficulty and the resource of hardware implementation for t2 encoder is reduced, and the parallelizability of the jpeg2000 hardware system is enhanced

    通過降低率失真斜率估計的計算復雜度、簡化優化截取方法和碼流組織中tagtree編碼方法，降低了t _ 2編碼器硬體實現的難度，減少了硬體資源，提高了jpeg2000硬體系統處理的并行度。
  11. Abstract : the present paper presents a new method for constructing optimal quantisation tables. the method produces optimal rate - distortion performance in a fixed block size dct

    文摘:提出一種構造擇優量化表的新方法.在一個固定塊尺寸的離散餘弦變換（ dct ）中，該方法可產生優化的率失真特性
  12. The thesis discusses the rate control arithmetic of mpeg - 4 based on quadratic rate distortion model, and then presents a rate control arithmetic of i frame and improves the adjust policy of quantisation param

    本文針對低帶寬的應用要求對原演算法進行改進，增加了對系統性能影響比較大的i幀的碼率控制模型，並考慮場景變化的影響，對量化值的調整方法進行了改進。
  13. An optimal subband rate allocation algorithm in mean - squared error ( mse ) minimization sense was proposed, which achieves persistent optimal rate - distortion performance under any given rate constrains

    提出均方誤差最小意義上的最佳三維子帶碼率分配演算法，該演算法在任意給定碼率限制條件下都能獲得最優率失真性能。
  14. Ahg report on avs1 - p7 performance testing, sept. 2005. 72 stockhammer t, kontopodis d, wiegand t. rate - distortion optimization for h. 26l video coding in packet loss environment. in 12th international packet video workshop pv 2002, pittsburg, py, may 2002

    對rtp打包格式的介紹包括以下內容：什麼是rtp和rtp打包格式，目前國際上都有哪些視頻rtp打包格式標準， avs - m rtp打包格式及其與h . 264 avc rtp打包格式的比較。
  15. We take h. 264 scalable extension as example to analysed the bitstream structure and error propogation path and create the adaptive rate - distortion model. complying with the presented scalable video stream model, the file format for scalable video is proposed based on iso base media file format, which is simple and flexible enough to address the demands of scalable video application

    最後，本文以基於h . 264的可擴展編碼技術為例，分析其碼流結構和誤差傳遞路徑，建立基於h . 264的可擴展編碼自適應率失真模型，設計了兼容國際標準的可擴展視頻編碼文件格式。
  16. We improve the real - time and quality performance of a scalable 3d wavelet coding scheme, mc - ezbc, and then focus on the joint rate - distortion target model of the mc - ezbc transcoding and propose a rate - distortion optimized layered rate control method

    本文對可伸縮三維小波編碼演算法mc - ezbc實時性能和質量進行了改進，在此基礎上，重點研究了mc - ezbc轉換編碼的聯合率失真目標函數和優化演算法，提出了率失真優化的mc - ezbc轉換編碼分層速率控制方法。
  17. To support smooth quality reconstruction under multiple rate constraints of transmission, it ’ s important to obtain the actual rate - distortion ( r - d ) function or distortion - rate function of each enhancement layer ( el ) frame

    為了能夠在不同的傳輸碼率下平滑重建fgs目標視頻流，基於幀的fgs增強層率失真函數的獲取是一個非常關鍵的問題。
  18. The first is in the position of convex rate - distortion and the second is in the position of arbitrary rate - distortion curve

    第一種是在率失真曲線是下凸的情況下進行的，這種方法演算法是以率失真曲線的斜率為基礎的。
  19. The difference of the two methods is that the first is in the position of convex rate - distortion and the second is in the position of arbitrary rate - distortion curve

    這兩種比特分配演算法的差別在於，第一種是在率失真曲線是下凸的情況下進行的，這種方法演算法是以率失真曲線的斜率為基礎的。
  20. So if we gain the relation between the the derivative of ggd distortion - rate function and the ggd shape parameter, then we can reconstruct the rate - distortion function. the bitplane - based fgs of mpeg - 4 has been accepted as a standard coding tool for video streaming applications

    這樣，實際中只需研究特定編碼量化模式下ggd失真速率函數的導數與ggd形狀參數的關系和規律，就可以重建相應編碼模式下的失真速率函數。
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