臺灣博碩士論文加值系統

由於現今數位訊號處理器(DSP)的平台眾多，針對各平台的不同，其相對的演算法可自行發展，如此便會造成應用程式開發者在整合上的不方便，因此德州儀器公司(TI)率先規劃出eXpress DSP演算法互通介面標準XDAIS (eXpressDsp Algorithm Interoperability Standard)，主要用來克服演算法彼此間使用記憶體是否會發生衝突，若透過XDAIS可確保演算法符合標準規則，則可整合到任何TI DSP系統中。本研究歸納整理出以XDAIS封裝單核心演算法的方法，並能移植到DaVinci DM6446雙核心平台上執行，先舉一簡單的演算法範例來說明其封裝的步驟，以及在ARM端、DSP端所需要撰寫的相關文件，透過編譯工具xdctools進行編譯後，產生出能在DM6446平台上執行的可執行檔。在本文中規劃把本實驗室自製的H.264快速模式選擇演算法依照XDAIS所定義的規範修改成符合XDAIS的架構，並且把演算法的程式流程轉變為呼叫副程式的模式，再依照演算法的需求去定義需要使用的XDM(XDAIS for Digital Media)函式部份，經過編譯後產生出可執行檔。由上述可知在開發演算法時就必須重新思考演算法運行流程，還有記憶體使用上的協調，這些都是開發者要多留意的地方，希望能提供往後的開發者在種種眾多的文件中，能夠清楚瞭解方向，減少入門時間及開發時間。

Since there is a very diverse multitude of digital signal processor (DSP) platforms, each platform is free to develop their own algorithms, resulting in inconvenience for application developers during integration. Therefore, Texas Instruments pioneered the development of eXpressDsp Algorithm Interoperability Standard (XDAIS), mainly used to overcome the conflicts due to the memory usage of the algorithms. Through XDAIS, the algorithm is ensured to be able to integrate into any TI DSP system. This study clarifies the method of using XDAIS to package single-core algorithms in order for them to be executed on DaVinci DM6446 dual-core platforms. In this paper, a simple algorithm is given first as an example to illustrate the packaging steps. Then, the needed documents from both the ARM side and DSP side are written and the tool, xdctools, is used to compile and produce an executable file that can run on the DM6446 platform. In this paper, the H.264 fast mode selection algorithm made in our laboratory is to be packaged according the rules defined by XDAIS so that the algorithm matches the structure of XDAIS. Then, the H.264 algorithm needs to be changed into "subroutine”, and according to the requirements of that algorithm, needs to be used to define the XDM (XDAIS for Digital Media) function. Finally, the algorithm needs to be compiled to produce an executable file. From the above study in algorithm development, one sees that it is necessary to consider the algorithm running processes as well as the coordination of the usage of memory. These are what the developers should pay more attention to as to allow all future developers with numerous files to clearly understand the direction to process the files so that they may reduce development time.

明志科技大學碩士學位論文指導教授推薦書...................................i
明志科技大學碩士學位論文口試委員審定書..................................ii
明志科技大學學位論文授權書.............................................iii
誌謝....................................................................iv
摘要.....................................................................v
Abstract................................................................vi
目 錄..................................................................vii
表目錄..................................................................ix
圖目錄...................................................................x
第一章 序論............................................................1
1.1 研究背景與動機..................................................1
1.2 研究目的與方法..................................................2
1.3 論文架構........................................................3
第二章 背景知識........................................................4
2.1 XDAIS標準介面規範探討...............................................4
2.1.1 XDAIS規範與建議...................................................4
2.1.2 XDAIS介面格式...................................................11
2.1.3 XDAIS編譯與相關軟體工具探討.....................................23
2.2 TI雙核心平台.......................................................28
2.2.1 達芬奇技術與雙核心框架簡介..............................28
2.2.2 雙核心平台架構..............................................30
第三章 研究方法.......................................................44
3.1 XDAIS封裝之環境設定..............................................44
3.1.1 Linux環境設置..............................................45
3.1.2 Windows與Linux溝通環境設置.................................50
3.1.3 EVM開發板環境設置..........................................50
3.2 XDAIS封裝演算法之方法............................................52
3.2.1 Linux實作XDAIS的四個開發角色與開發流程.....................52
3.2.2 單核心與雙核心程式之探討...................................61
3.2.3 XDAIS Codec之探討..........................................63
3.2.4 XDAIS Server之探討.........................................71
3.3.5 Codec Engine 之探討........................................74
第四章 封裝單核心演算法探討...........................................75
4.1 以XDAIS封裝Intra16x16演算法......................................75
4.2 以XDAIS 設計與封裝H.264快速模式選擇演算法........................85
第五章 結論...........................................................100
參考文獻...............................................................102

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