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1. 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(xiàn)fcd15444 - 1的j2k編碼模型，并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，并且本文給出了該模型編碼解碼的各個部分的相關實現(xiàn)。
2. Secondly , a software - based real - time h . 264 / avc is realized on x86 based ip stb by optimization for algorithms . based on the previous research of others , this dissertation implements an optimization of algorithm for motion compensation . context - adaptive variable length coding ( cavlc ) is chosen as entropy coding , a high
   其次,本文討論了基于x86架構ip機頂盒的h . 264解碼器的純軟件優(yōu)化問題,在參考相關資料的前提下,從算法角度實現(xiàn)了一種運動補償?shù)膬?yōu)化算法,以及一種基于分組的可變長快速cavlc熵解碼算法。
3. 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(tǒng)的二維編碼方法相比,具有高壓縮比和高圖象質量的優(yōu)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。
4. Then . this paper analyzes h . 263 - protocol for video coding which is the core part of the system . the h . 263 protocol integrates the prediction coding dct transform coding and entropy coding to realize the compression for video data . in addition , it describes the codec architecture and data format . this paper ( 1 ) presents a effective algorithm of motion estimation for inter - frame prediction coding ; ( 2 ) analyzes the way implementing 2 dimension dct transform by algorithm of 1 dimension fast dct transform ; ( 3 ) optimizes the above procedures with the mmx and sse of intel . then comes up with an effective dct algorithm
   接著，著重分析了系統(tǒng)的核心部分： h . 263視頻編碼協(xié)議。該協(xié)議將預測編碼、 dct變換編碼和熵編碼相結合實現(xiàn)對視頻數(shù)據(jù)的壓縮，并規(guī)定了編碼器的總體結構和數(shù)據(jù)格式。本文( 1 )提出了一種有效的運動估計算法進行幀間預測編碼； ( 2 )分析了通過一維dct快速算法完成二維dct變換編碼的方法； ( 3 )應用intel的mmx和sse對上述過程進行了優(yōu)化，并結合mmx和sse技術提出了一種有效的dct計算方法。
5. 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；并詳述了并行算法、圖像壓縮算法的基本概念和模型；著重討論了網(wǎng)絡并行l(wèi)ogp模型及并行計算的開發(fā)環(huán)境；并通過fft并行編碼算法、 dct并行編碼算法、幀間運動估計和補償?shù)牟⑿兴惴ā⒂纬滩⑿芯幋a算法等圖像壓縮編碼處理的并行算法的設計、分析、優(yōu)化及模擬實現(xiàn)，較全面、形象地展示了并行算法的開發(fā)方法及其應用。