block encoding 中文意思是什麼
block encoding
解釋
分塊編碼-
For video codec, after analyzing and researching the newest standard h. 264, an efficiency algorithm was proposed in this paper using self - feature, spatial correlation and temporal correlation to judge the encoding mode of one macro - block. through this method, the best prediction mode can be obtain before encoding, then, the coding time can be reduced dramatically with a little expense of bit - rate. for video transmission, in this paper, a transmit method was proposed using tcp / ip protocol under the environment of local networks
首先，在分析及研究最新的視頻編碼標準h . 264的基礎上，利用宏塊自身的特點和其時間、空間的相關性來判斷宏塊應該採用的編碼模式，從而提前得到該宏塊的最佳編碼模式，新方法有效地克服了原標準演算法中窮舉式的復雜演算法，在壓縮碼流只有少許增加的情況下，大幅度地提高了幀內及幀間編碼的速度。 -
Consoidering the low bit - rate video encoding characteristics, background block search algorithm, which is based on diamond search algorithm was used to improve the motion estimation speed. and detection of all - zero block algorithm was chosen for the reason of static background sence in minotor video encoding application
分析了低碼率監控視頻的特點后，我們對編碼演算法進行了修改，提出了基於鉆石搜索的背景塊運動搜索演算法和全零塊預判演算法，提高了編碼程序的效率。 -
Firstly, based on conventional vq, a fast algorithm named equal - sum block - extending nearest neighbor search ( ebnns ) is presented, which not only can achieve the reconstructed image of full search algorithm but also can greatly reduce both the codeword search ratio and chip area. in order to improve coding efficiency, a new algorithm called correlation - inheritance coding is proposed, which is embedded in conventional vq system to improve compression ratio by re - encoding the indexes
首先，在普通矢量量化基礎上提出了等和值塊擴展最近鄰快速碼字搜索演算法（ ebnns ） ，該演算法在圖像畫質達到窮盡搜索演算法的前提下，大大降低了碼字搜索率和硬體實現面積；為了提高編碼效率，在相關性編碼方面，提出了相關繼承編碼演算法，對普通矢量量化后的編碼索引進行無損重編碼。 -
Ldpc code belongs to the linear block code which is encoded by the information sequence multiplies generator matrix. although the parity - check matrix of ldpc code is sparse, the generator matrix is not. the encoding complexity of it is linearly proportional to the square of code length
Ldpc碼屬于線性分組碼，線性分組碼的通用編碼方法是由信息序列根據碼的生成矩陣來求相應的碼字序列，盡管ldpc碼的校驗矩陣是非常稀疏的，但它的生成矩陣卻並不稀疏，這使得其編碼復雜度往往與其碼長的平方成正比。 -
Finally, the concept of space - time codes and encoding design criteria are discussed here. chapter 4 describles space - time block codes thoroughly
最後闡述了空時碼概念，並詳細給出了空時碼編碼設計思想和準則。 -
At last, the vlsi implementation complexity of motion estimation in video encoding is analyzed. furthermore, a fast block matching algorithm based on hardware implementation and its vlsi architecture are presented
最後，本文對實時視頻編碼器中運動估計的vlsi實現方法進行了研究，提出了一種易於硬體實現的快速塊匹配演算法及其vlsi結構。 -
On the basis of the authors ’ results published in this journal [ 67 ], this paper further proposed two strategies which improved both quality and speed of fractal encoding : one, a priori adding additive white gaussian noise into the image being encoded to reduce the domain blocks that are unlikely to meet the constraint on contrast scaling factors ; the other, range blocks with small standard deviations are directly approximated by the constant block ( i. e., all the
在筆者原有結果[計算機模擬， no . 8 ， 2004 ]的基礎上，本文提出進一步提高解碼圖像質量和編碼速度的方案:一是預先在待編碼圖像中添加高斯白噪聲以進一步減少不滿足對比度因子約束的domain塊的數目;二是對小方差range塊直接用其均值塊代替以進一步加快編碼速度。 -
With a view to dct that costs the longer computing time, fast dct is proposed, and the method of prejudgment of an macro - block of all zero coefficient of dct is adopted in this paper, which makes about 40 percent dct computation reduced, consequently, the encoding speed of h. 263 encoder can be further increased
263編碼器的編碼速率；對運算量較大的dct給出了快速演算法，並對全零dct系數塊採用提前判斷的方法，從而省去了約40的dct運算，進一步提高了h 263編碼器的編碼速率。 -
This algorithm combined joint - component vector quantization respectively with zero block and zero tree coding, scanned three component of color image separately and simplified separate coding into joint scanning and joint encoding
該方法將聯合色彩分量矢量量化和零塊、零樹編碼方法巧妙結合，把彩色圖像的三個色彩分量單獨掃描，單獨編碼的過程簡化為聯合掃描和聯合編碼的過程。 -
However, there ' s a especially unsatisfying problem in this method : too long encoding time, mainly because of the considerable number of domain blocks to compare with for each range block in encoding phase, which, in fact, prevent fractal image compression from becoming a practical method for image compression, hence fast encoding has become a hot issue in fractal image compression
但是，這種方法存在一個最大的問題：編碼時間過長，主要是因為編碼時定義域塊的搜索量非常可觀。這實際上已成為了該方法走向高效能實用化的最主要障礙，因此分形編碼加速方法已成為了近些年來分形壓縮的一個研究熱點。 -
The paper analysis the image compression standard of jpeg2000 for the generality, describe the roi coding of jpeg2000, in the same time, the author briefly introduce wavelet theory which is the basis of the discrete wavelet algorithm adopted by jpeg2000, analysis the algorithm of roi based on discrete wavelet transform. finally the author carry on the detailed analysis to ebcot algorithm and to the multiple rois method, analysis every block of encoding, proposes one coding algorithm of roi based on ebcot and proposes one method can realize image multiple roi and multiple quality compression
本文從一般性出發分析了jpeg2000標準，對jpeg2000的roi編碼進行了描述，同時對jpeg2000採用的離散小波變換演算法的理論基礎進行了介紹，分析了基於小波變換的圖像感興趣區域編碼方法。最後特別對jpeg2000標準的ebcot演算法和多興趣區域編碼方法進行了詳細的研究，對編碼的各個環節進行了分析，提出了基於ebcot的感興趣區域編碼演算法及實現多興趣區域多質量的壓縮的編碼方法。 -
This paper first research on main technologies used by avs standard, which include prediction, transform, quantization, in - loop filter, and entropy encoding, and then focus on the 2d - vlc entropy coder of avs, which is context - based adaptive coder. this encoder operates on run - level pair, and it uses the type of current block and value of current coefficients to switch vlc code - table. these tables are designed according to the distribution of transformed coefficients, and this way is much better than using only one table to code all residual coefficients in one 8x8 block
本文首先詳細研究了avs標準的核心技術，包括預測編碼、變換量化、環路濾波器以及掃描和熵編碼等，之後重點研究了avs標準中使用的基於上下文的2d - vlc變長編碼方法，這種方法編碼的是（ run ， level ）數對，同時根據當前編碼塊的類型和殘差系數這兩種上下文信息來切換碼表，這些碼表是預先根據變換系數在不同位置的分佈信息設計好的，這樣要比只使用一個變長碼表來編碼塊內所有位置上的殘差系數的壓縮效果要好得多。 -
Note that in fractal encoding, each range block is to compare with domain blocks after some grey - level affine map. hence we first put forward a kind of image quadrature invariant of affine maps above, which can be thought of a generalization of mario feature
由於在分形編碼時值域塊實際上是與經過灰度仿射變換之後的定義域塊進行比較，因此我們首先提出了一種在灰度仿射變換下保持不變的圖像矩不變量，它可看作是mario特徵的推廣。 -
Space - time block codes ( stbc ) based on orthogonal design has attracts enough attentions in its applications in mimo - ofdm systems for its full diversity exploiting and low coding / decoding complexity. these applications include not only system performance improvement, but also reduction of the peak to average power ratio in mimo - ofdm systems. under these backgrounds, this paper first studies space - time block codes under the single carrier, flat fading situation, discusses the encoding / decoding principle and its performance under different channels. then, the author focused on the performance of space - time codes under time selective and frequency selective channels, uncovered the fundamental cause of how maximum doppler shift and power delay profile influences the performance of space - time codes through deduction and simulation
在上述背景下，本文以單載波，平坦衰落通道下的空時分組碼為切入點，深入分析了其編譯碼原理和在不同通道情況下的性能;以此為基礎，後文展開了對空時分組碼在多載波，時間選擇性和頻率選擇性衰落通道下的性能研究，通過理論推導和充分的模擬，揭示了空時/頻分組碼在時頻選擇性衰落通道中的性能變化的根本原因;在以上對多載波系統中空時分組碼的研究的過程中，作者發現了空時分組碼在降低系統峰平比方面應用的可行性，提出了一種降低峰平比的新方法。 -
Experiment results show that the method can speed up the image encoding and remove the block offect
該演算法能有效縮短編碼時間、消除塊效應、實現彩色圖像快速分形編碼。 -
Trailing characters at the end of the data block are stored in an internal buffer and used in the next encoding operation
，則位於數據塊結尾的尾隨字元將存儲在內部緩沖區中，並在下一次編碼操作中使用。對一個數據塊調用
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