coding efficiency 中文意思是什麼
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This scheme firstly determined the operating mode of coded video stream in nal layer according to the current channel state before they were packed. the coded video stream operated under ssm in error - free channel so as to reduce the packing tradeoff and increase the coding efficiency. while in error - prone channel, they operated under dpm combined with improved unequal error protection ( uep ) scheme based on human eyes characteristic in order to elevate their robustness to channel error
該方案中編碼視頻信息在進行打包封裝前，首先根據當前通道狀態信息自適應地確定其在nal層中的工作模式，在無丟包通道中採用單數據片模式以降低編碼視頻流的打包開銷，提高編碼效率；而在丟包通道中採用數據分區模式以提高編碼視頻流對通道誤碼的魯棒性能，同時基於人眼視覺特性，提出了一種改進的uep策略。 -
In all kinds of complicated network, oriented linking and unlinking, communication frequency resource is strained, and bandwith to transmitting audio frequency signal is too restricted, complicated and fluky, while audio frequency data exponential have been increased in the last several years. under the circumstances, based on the research of predecessor, this paper studies wavelet analysis ' s maths gist and practices significance on signal process, and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data, which gives attention to coding efficiency, multirate and compression delay. simulation experiment on the arithmetic has been done by matlab
針對無連接和面向連接的各種復雜網路環境下，通信頻帶資源緊張，音頻傳輸帶寬有限且復雜多變，而各種音頻數據又日益增多的局面，本文研究小波分析在信號處理方面的數學依據和在數據壓縮方面的實際意義，在前人不斷工作的基礎上，提出了一種優化小波包變換編碼方案用於音頻數據的壓縮演算法，兼考慮了編碼效率、多碼率和壓縮時延多個方面，並在matlab環境下做了模擬實驗，對各種音頻信號及多種小波函數做了模擬結果比較，實驗結果證明該演算法可以在一定計算復雜度下可以很好地改進壓縮效果，達到多碼率下實現實時編解碼的過程，在高速dsp晶元等硬體設備支持下，可以有效應用於實際復雜多變信源編碼。 -
Experiments show that the efficient motion estimation algorithm proposed can further reduce block matching distortion computations relative to conventional fast motion estimation algorithms with neglectable coding efficiency loss ( within 0. 1db )
提出一種基於節點模型的可變形塊匹配運動估計演算法來搜索最佳運動矢量。實驗表明，在編碼性能損失很小的條件下，可以使得運動搜索塊匹配的運算量在通常快速運動搜索演算法的基礎上下降61 % 。 -
The first facet is to put forward four - step block matching algorithm which can deduce the time of motion estimation and improve the coding efficiency, based on the traditional motion estimation algorithms. the second facet is to propose a new rate control algorithm, that is average - reaction rate control algorithm, based on the rate control of mpeg2. the new rate control algorithm can achieve rapid and efficient adaptive coding
首先在對傳統的運動估計演算法進行研究和改進的基礎上，提出了四步搜索塊匹配的運動估計演算法，減少了運動估計的時間，提高了編碼效率；其次在分析mpeg2比特率控制的基礎上，提出了一種新的比特率控制演算法? ?平均響應比特率控制演算法，該演算法能夠快速有效的實現自適應編碼。 -
If this frame field adaptation is extended to macro block level, the coding efficiency will be further increased
在h . 264 avc中，圖像級的幀場自適應paff編碼和宏塊級的幀場自適應mbaff編碼都被采納。 -
Experimental results show that the proposed method can reduce the computational complexity significantly compared with the full search method, and maintain similar decode visual quality and coding bit rate, then improve the ray - space data coding efficiency
實驗結果表明，與全搜索方法相比，該方法計算復雜度明顯降低，同時保持了近似的解碼圖像質量和編碼碼率，進一步提高光線空間數據的編碼效率。 -
C2dvlc employs context - based adaptive multiple table coding to exploit the statistical correlation between dct coefficients of one block for higher coding efficiency
算術編碼利用編碼符號的聯合概率，並且其機制更易於概率匹配，因此編碼效率高。 -
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。 -
This standard provides a technical solution for many applications within the information industry such as digital broadcast, high - density laser - digital storage media, and so on. the basic part of avs, avs1 - p2, targets standard definition and high definition format video compression, and aims to achieve similar coding efficiency as h. 264 avc but with lower computational complexity
Avs1 - p2視頻壓縮標準的制定開始於2002年6月，它主要面向標清和高清視頻的編碼，目標是要取得與h . 264 avc相似的編碼性能，而編碼復雜性要大大低於h . 264 avc 。 -
With roll - off factor of 1. 35, rs coding efficiency of the goat. coding efficiency 7 8 rate for qpsk symbol rates by 2
其中滾降系數為1 . 35 ， rs編碼效率為188 204 ，卷積碼編碼效率為7 8 ， qpsk碼率為符號率乘2 -
Without exploiting motion information, normal 3d wavelet transformation can decline its coding efficiency in complex and movable scene
常規的三維小波變換因為沒有利用運動信息，對復雜的運動場景的編碼效率會大幅度下降。 -
After that, the error resilience tools are briefly reviewed before the file format and rtp payload format discussions. the coding efficiency and error resiliency performances of avs - m are provided finally. h. 264 avc has been extensively used as a comparison in many of the discussions and the simulation results
本文介紹了avs - m的各種高層編碼工具avs - m文件格式和rtp打包格式，並給出了avs - m的編碼效率和容錯性能的模擬實驗數據。 -
The paper studies the theory and coding methods of the low bit rate video recommendation h. 263 + detailedly, realizes real - time software codec based on h. 263 + under linux os, furthermore, finishes some negotiable coding options which can observably improve the coding efficiency, such as advanced prediction mode, advanced intra coding mode, deblocking filter mode and modified quantization mode
263 +的原理和編碼方法做了深入的研究，軟體實現了基於h 263 +標準的視頻編譯碼器在linux操作系統下的實時編解碼，並實現了能顯著提高編碼效率的幾種可選編碼模式，主要包括先進預測模式、先進幀內編碼模式、塊邊界濾波模式和改進量化模式等。 -
The video part of avs audio video coding standard has been finalized recently. it has adopted variable block size motion compensation to improve its coding efficiency
Avs audio video coding standard是我國具備自主知識產權的第二代信源編碼標準，其視頻標準部分最近已經被確定為國家標準，即將投入應用。 -
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。 -
After programming, the result shows greatly improvement of coding efficiency compare to the original algorithm
通過編程實現后，實驗顯示了改進演算法相對于原始演算法效率上的明顯提升。 -
Another advantage of zh - transform based method is that it has higher coding efficiency than the method used in mpeg - 4 first edition
更重要的是，本文方法在編碼效率上比mpeg - 4現有的形狀編碼方法也有很大提高。 -
As to still image coding, even though the performance of wavelet image coding algorithms excel first generation image compression standard jpeg, but they will produce boring mosquito noise at low bit - rates, which are mainly located around image edges. besides that, their coding efficiency will drop rapidly for those natural images with rich textures
而在靜態圖像編碼方面，雖然小波圖像演算法的編碼性能遠遠超過第一代圖像壓縮標準jpeg ，但它在低位率條件下也會出現蚊式噪音，主要集中在圖像邊緣附近，而且對于包含豐富紋理的自然圖像，其編碼效率也會急劇下降。 -
Motion compensated prediction error image has significant amplitudes mainly along the boundaries of moving objects, correspondingly its wavelet coefficients contain large energy in high frequency bands. this greatly reduces the coding efficiency of ezw. it is first provided that the correspondence between the significant amplitudes area of the mcp error image and the wavelet coefficient significant map, then encode the significant map efficiently using quadtree approach, followed by bit - plane coding the significant coefficients to produce an embedded data stream. experiment result shows that compared to ezw and zte, the proposed algorithm is more efficient and has better performance
演算法對于運動補償余量誤差幀首先進行小波變換，並選取適當的閾值，用重要圖表示大於該閾值的重要系數。根據殘差幀小波系數的統計特性，用四叉樹方法編碼重要圖，並對重要系數作位面編碼，生成嵌入式碼流。實驗表明，與ezw ， zte等演算法相比較，該演算法編碼效率高，復現圖像質量好。 -
Ii sqs image coding has achieved higher coding efficiency, but he hasn ? thought about the differences between relativity degree and feature of the wavelet subtrees in different directions, according to the differences of the relativity among them, different scan methods have been adopted in coding
Sqs演算法的核心是利用不同方向、不同頻帶之間的小波系數的自相關性進行分形編碼。盡管davis的sqs演算法取得了較高的編碼效率，但他沒有考慮到位於不同方向上的小波樹之間的相關性程度和性質是不一樣的。
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