In chapter2 , we discuss the basic theory and the method of watermarking used frequently . in chapter 3 and chapter 4 , the mpeg encoding algorithm and its file format are introduced 在第三章中介紹了與mpeg系統解碼相關的一些概念,在第四章中分析了mpeg編解碼算法。
Focusing on the feature of vliw , optimized mpeg audio encoding algorithm fixed - point parallelized programe . practising the real - time encoding of mpeg layer ii based on map - cadsp 對mpeg音頻編碼算法進行算法的優化和定點化,從而可以在性價比較高的定點dsp上實現mpeg音頻編碼。
Then it proposes a new fast zerotree encoded algorithm combing wavelet image zerotree data - structure and optimum quantization , designs a realization scheme and gives simulation results and their analysis 對快速零樹編碼算法作了原理分析,設計了具體的實現方案,給出了仿真結果和分析。
Ccss is a compressed storage system by column . it adopts different storage structure and encoding algorithms to compress the attribute by column - wise with different granularity 本文詳細介紹了rcss的壓縮存儲結構(包括編碼字典和壓縮數據頁的格式、系統字典的擴充)以及具體的壓縮、插入和刪除算法。
The principle , linchpin technologies and flow of the mpeg - 1 layer audio encode algorithm are discussed in detail in this paper . the realization and optimization of lame mp3 audio encode algorithm are also introduced in this paper 本文詳細論述了mpeg - 1第三層音頻編碼算法的原理、關鍵技術和算法流程以及lame算法的硬件實現和優化,用以實現音頻的實時編碼。
Then discusses conventional encoding and efficient encoding using special sparse parity check matrix in encoding algorithm , and expatiates the principle of message passing and spa which has the best performance in decoding algorithm 在編碼算法里詳細討論了傳統的編碼算法以及使用特殊形式奇偶校驗矩陣的快速編碼算法。在譯碼算法里介紹了mp算法集的基本原理和譯碼性能最好的和乘積譯碼算法。
In chapter 5 , we discuss where to embed the watermark based on the mpeg ' s encoding algorithm , the differences between mpeg system and static image are considered , we also discuss how to mesure the qulity of a kind of watermarking method 在第五章中,首先根據mpeg文件格式及其編解碼算法的特點提出了在視頻中嵌入水印的位置,比較了它和靜態水印技術的異同點。給出了一種衡量mpeg視頻水印技術的方法。
Through anatomizing ezw coding algorithm and taking the effects of human being ’ s vision characteristics on quality of reconstituting image . a improved zeretrees algorithm are put forward . at last a new image compression encoding algorithm based on wavelet transform and vector quantization is put forward . the experiment show , in very low bit rate , using the proposed algorithm , the reconstructed image is superior to that of ezw in both of perception and psnr 最后,在小波樹的基礎上,通過對矢量量化的研究,本文提出了一種基于四叉樹結構新的小波樹矢量量化壓縮編碼算法,實驗證明,在較高壓縮比的情況下,使用此方法得到的重構圖象質量(視覺效果和峰值信噪比)比通常的小波壓縮算法有了較大的提高。
The focus is placed on the investigation of the standard of the encoding algorithm for mpeg audio layer iii , and the analysis of the major four modules in the compression algorithm , including encoding of subband filter bank , psychoacoustics model , quantification and huffman coding , frame packing 重點研究了mpeg音頻第層編碼的算法標準。詳細分析了壓縮算法中的四個主要功能模塊:子帶濾波器組編碼,心理聲學模型,比特流量化與霍夫曼編碼,幀數據流格式化。
With this method , the compressed bit - streams , which are encoded by dct - based encoding algorithm , can be processed directly to locate the character - regions in the images , just a very small amount of decoding is required so , the amount of data which want to process is smaller , the processing speed is faster and the demand of computer memory is less 文獻中將此模型用在以dct為編碼基礎壓縮數據上,效果較好。本文將其算法中的能量定義利用塊間的信息重新定義,并且采用自適應動態閾值對原算法進行改進。對比實驗結果表明,改進的方法對圖像字符定位比原方法準確率更高,漏檢情況有一定程度的降低,取得了較好的效果。