entropy coding 中文意思是什麼

entropy coding 解釋
熵編碼，平均信息量編碼
  • entropy : n. 1. 【物理學】熵。2. 【無線電】平均信息量。
  • coding : n. 編碼；譯成電碼。
  1. Different bit rates are allocated to wavelet blocks according to energy the wavelet blocks include. bit rates in wavelet blocks are adaptively adjusted in coding process. by use of bipartition, the entropy of each wavelet block approximates to the target bit rate of one

    該演算法首先根據每個小波塊所含能量的多少和到每個小波塊實際編碼所用的比特數，給其分配不同的碼率；然後根據二分法，通過調整各小波塊的量化因子使得各小波塊的熵逼近它的目標比特率。
  2. The high entropy of the real and imaginary parts of sar raw data makes lossless - coding compression techniques unfit for sar raw data. in chapter 4, some compression algorithms for sar raw data compression, such as baq, upq, bavq and wt - subbandcade are analyzed and discussed. an improved unrestricted polar quantizer ( upq ), which can enhance the performance of the quantizer is put forward

    第四章分別對塊自適應量化（ baq ）演算法、非約束式極坐標量化（ upq ）演算法、塊自適應矢量量化（ bavq ）演算法和小波變換子帶編碼演算法進行了分析和研究，並詳細討論了這些演算法在工程實際中的應用。
  3. 138 variable length coding ( vlc ) : a reversible procedure for entropy coding that assigns shorter bit strings to symbols expected to be more frequent and longer bit strings to symbols expected to be less frequent

    可變長編碼vlc ：一種可逆熵編碼，為出現頻率高的符號分配少的位，為出現頻率低的符號更多的位。
  4. Context - based 2d - vlc entropy coder in avs video coding standard

    基於上下文的二維變長熵編碼器
  5. The adaptation processing includes linear prediction coefficient adaptation and adaptation of quantization step size for residual signals. based on g. 726, we adopt a huffman coder to make use of probability statistic of bit cascade covering n ( n 1 ) samples generated from adpcm, in order to further reduce the bit rate. ng is lossless entropy coding, the speech quality of our improved algorithm should be same as that of g. 726 standard

    我們的研究和改進工作包括:研究最優非均勻自適應量化器，及其自適應演算法;研究波形預測函數，以及函數零點、極點的自適應演算法;基於每n （ n 1 ）個樣本所對應符號的概率統計，對預測殘差量化值再進行huffman編碼，進一步降低比特率。
  6. Better segmentation effect can be attained by coding gray levels of pixels as eigenvector, taking advantage of histogram entropy principles function as fitness function, adopting ranking selection operation, making use of arithmetic crossover and mutation at a certain probability, combining with clustering analysis to initialize clustering center of the population to segment cells image with genetic algorithm

    以像素的灰度值為特徵向量進行編碼，利用直方圖熵法準則函數作為適應度函數，採用基於排名的選擇操作，以一定的概率進行算術交叉和變異，並結合聚類分析設定種群的聚類中心對細胞圖像進行遺傳聚類分割。
  7. However, there still exists correlation between coefficients of sub - matrices after 4d - mdct. this thesis proposes a four dimensional matrix video coding method based on context to get rid of the correlation between coefficient sub - matrices further. it includes three parts as follows : firstly, this thesis presents a four - dimensional matrix video encoder and decoder model, which contains components of prediction, transform and entropy coding

    實驗結果表明，該方法與傳統的二維編碼方法相比，具有高壓縮比和高圖象質量的優點;與矢量量化編碼相比，具有碼表體積小，計算復雜度低的特點;與霍夫曼編碼方法相比，在相同信噪比的條件下，對運動相對劇烈的視頻序列壓縮效果要更好。
  8. Shanghai, china, sept 2005, n1208. 16 dong j, wang j, yu l. entropy coding scheme for 4tm 4 residues and improvement for cbp

    編碼效率的提高來源於多碼表匹配了局部概率分佈的變化，並且碼表的自動切換省去了編碼side information信息的額外開銷。
  9. According to the description of fcd 15444 - 1, a j2k coding model is put forward. that is the innovation aspect of this paper. processes in the model such as discrete wavelet transform, quantization, arithmetic entropy coding, tiling etc are analyzed

    本文提出了一個實現fcd15444 - 1的j2k編碼模型，並對該編碼模型中的離散小波變換、標量量化、算術熵編碼、分塊以及其他過程進行了分析，並且本文給出了該模型編碼解碼的各個部分的相關實現。
  10. Context - based adaptive binary arithmetic coding ( cabac ) has been a normative scheme of entropy coding in video coding standards such as h. 264, avs, for its excellent coding efficiency

    基於上下文的自適應二進制算術編碼（ cabac ）以其高效的編碼優勢，被h . 264 、 avs等視頻標準紛紛採用，成為主要的熵編碼方案。
  11. The research of improved photo coding based on entropy coding

    基於信息熵編碼的改進圖像編碼方法研究
  12. 7 jie dong, jianpeng wang, lu yu. an entropy coding method for 4 4 coefficient and new cbp coding method

    文章第3節介紹了avs第7部分中的內容自適應的二維可變長熵編碼。
  13. Experimental results demonstrate that the proposed algorithm performs better than traditional entropy coding based on run length

    實驗結果證實了該演算法優于傳統的基於游長的熵編碼。
  14. Context based adaptive arithmetic coding is used in the last part of the encoding process as the entropy coding. the mq coder is adopted in jpeg2000

    與其它的熵編碼方法相比，算術編碼能夠取得更好的壓縮效果，但它演算法復雜，運算量相對增加。
  15. The standard is designed to give a new technical solution for a broad range of applications, such as very low bit rate conversational services and entertainment quality broadcast, interactive video - on - demand services etc. for the enhancement of the coding efficiencies, the new standard adopts new tools as following : multiple reference pictures, variable block - size with seven block sizes in motion prediction, quarter - pixel accuracy for motion vector, short word - length integer transform, context - adaptive entropy coding and loop filter deblocking

    H . 264 / avc標準支持從低帶寬、高誤碼率的無線移動視頻通信到高帶寬、低誤碼率的有線視頻廣播等多種應用，因此，日益受到業界的關注。為了實現更高的編碼效率， h . 264 / avc標準採用了很多新的編碼技術，如多參考幀預測、多尺寸編碼塊模式、 1 / 4像素精度運動矢量、整數變換量化、基於內容的熵編碼、新型幀內預測、去除方塊效應的濾波器等。
  16. At last, the design and implement of intra prediction, integer transform, quantization and entropy coding are investigated

    與此同時，論文還利用設計的新演算法，實現了基於快速運動估計的h . 264編碼器。
  17. To solve the above - mentioned two problems, this paper proposes a multiple description video coding method based on 3d - dct and mdsq. the system consists of several parts : video volume formation, 3d - dct, mdsq, rle coding and entropy coding and so on

    針對上述兩個問題，本文提出基於3d - dct的多描述編碼方案，它由分塊、 3d - dct變換、量化、 mdsq編碼、 rle編碼和熵編碼等部分組成。
  18. This thesis gives an overview of entropy coding in jpeg 2000, especially the code - block based coding and context based adaptive arithmetic coding. to optimize the implementation of mq encoder, several methods are adopted to optimize the algorithm which is emulated in matlab

    因此本文對jpeg2000標準中位平面編碼和基於上下文的自適應二進制算術編碼技術作了詳細的分析和研究之後，對自適應算術編碼演算法優化使其更適合於硬體實現。
  19. Firstly, it summarized the basic conceptions of image compress processing, parallel processing technique and parallel algorithm briefly. then it emphasized on the network parallel computing environment and logp model of parallel computation. at last, this paper described the methods of developing parallel algorithm and applications through the designing, analyzing, optimizing, and implementing of digital image coding parallel algorithm, include intra - frame coding, inter - frame coding, entropy coding, etc

    本文概述了并行處理技術和圖像壓縮技術；並詳述了并行演算法、圖像壓縮演算法的基本概念和模型；著重討論了網路并行logp模型及并行計算的開發環境；並通過fft并行編碼演算法、 dct并行編碼演算法、幀間運動估計和補償的并行演算法、遊程并行編碼演算法等圖像壓縮編碼處理的并行演算法的設計、分析、優化及模擬實現，較全面、形象地展示了并行演算法的開發方法及其應用。
  20. Fortunately, lapped transform ( lt ), a classical transform arithmetic, possesses the dct ’ s feature of simple realization and low storing cost, while maintaining dwt ’ s advantage. by analyzing its time lapped transform ( tlt ) and frequency lapped transform ( flt ), this article brings forward a arithmetic which carries the temporal laps and frequent laps at the same time and discusses this time - frequency lapped method ( tflt ) combining with context - based entropy coding

    疊式變換（ lt ）兼有餘弦變換（ dct ）實現簡單、存儲開銷小和dwt的優點，文中通過分析已有的時域重疊（ tlt ）和頻域重疊（ flt ）疊式變換，提出一種同時進行時域和頻域重疊的疊式變換演算法（ tflt ） ，並結合上下文熵編碼，討論時頻域重疊式變換演算法。
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