臺灣博碩士論文加值系統

　　目前的數位影像處理系統蓬勃發展，數位相機、數位攝影機陸陸續續衍生而出，然而在進行影像擷取、影像辨識、影像壓縮或是影像追蹤等工作時，往往都是由影像感測器(CCD)所擷取進龐大的視訊資料中運算或過濾出使用者需要的資料，然後再利用這些資料繼續執行使用者想達到的功能。但是若以個人電腦來執行，往往會因為個人電腦的移動性比較差、體積過大、價格昂貴有限等原因，往往不利於使用在某些特定單獨運作功能上；針對以上種種的方面的考量TMS320DSC25開發平台因此應孕而生。
　　本論文以TMS320DSC25為系統平台，此平台包含兩個處理器分別為ARM和DSP，經由外掛的數位影像感測器模組(CCD)與視訊解碼器(TVP5145)，來擷取數位視訊資料，也同時藉由麥克風接收音訊資料，並利用數位訊號處理器(DSP)中的硬體加速電路來處理視訊壓縮和音訊壓縮，最後再將運算結果快速地輸出到記憶體之中，本文將會以兩種不同的方式來實作可調整Frame rate視訊與音訊同步的錄影音與播放(動態的AV同步)，最後在根據兩種不同的實作方式進行一些測試與實驗，提出兩者的差異與優缺點。本論文研究在TMS320DSC25嵌入式開發平台上針對影音功能設計、實作並與ESOL作業系統結合，以提供完整的多媒體應用。

　　Nowadays digital image process systems is progressing very rapidly, digital cameras, digital Video camera are producing one after another. When we were make video capture , image recognition or image tracing, devices with a lot of sampling video data or filter the data which the users need, and then again we use these data to perform these functions which the users would like to reach. Since personal computers are for general purpose, it is unfavorable to provide some special functions. The other reason is that the movement of the computer is not convenient. According to the above reasons, TMS320DSC25 platform is a feasible choice to develop embedded system.
　　This thesis develops a system with TMS320DSC25 platform. The system includes two processors-ARM and DSP. By the way of CCD and TVP514, it can capture digital video data, at the same time, it can receive audio data by microphone. By DSP's hardware acceleration dealing with video encode and audio encode, thesis will make the result of the calculation output to memory. This thesis will use two different ways to implement video and audio synchronization encoding and decoding which can adjust frame rate. Finally, I have performed some tests and experiments with two different ways to show the comparisons. How to implement video and audio system and the combine with and ESOL operation system and then provide complete application of multimedia has been discussed in the thesis.

目錄
第一章序論.........................................................12
1.1研究背景........................................................12
1.1.1嵌入式系統的發展..............................................12
1.1.2嵌入式系統的應用..............................................13
1.2研究動機與目的..................................................14
1.3章節提要........................................................15
第二章TMS320DSC25系統之相關研究....................................16
2-1TMS320DSC25系統介紹.............................................16
2.1.1 TMS320DSC25系統演進與未來...................................17
2.1.2 TMS320DSC25系統架構.........................................21
2.3 TMS320DSC25發展環境介紹........................................31
2.3-1發展版........................................................31
2.3-2發展環境......................................................36
第三章TMS320DSC25系統暨影音同步之實作..............................40
3.1 Tvdecoder (TI TVP5145)晶片介紹.............................40
3.2視訊擷取架構介紹................................................44
3.3音訊接收架構介紹................................................47
3.4 ARM與DSP的溝通與指令...........................................48
3.5 video Encode架構...............................................52
3-5-1 ping pong buffer的控制.......................................55
3-6 video Decode架構...............................................57
3-7 Audio Encode架構...............................................59
3-7 Audio Decode架構...............................................62
3-9 AV同步介紹.....................................................64
3-10以DSP為主的AV同步控制..........................................65
3-10-1AV同步Encode的架構...........................................66
3-10-2AV同步Decode的架構...........................................69
3-10-3動態 framerate的調整.........................................73
3-11以ARM為主的AV同步控制..........................................77
3-11-1 AV同步Encode架構............................................78
3-11-2 AV同步Decode架構............................................81
3-11-3動態 framerate的調整.........................................85
4-1系統實驗環境架構................................................91
4-2 實驗結果與效能分析比較.........................................92
4-2-1實驗結果......................................................92
a.編譯程式與載入程式...............................................92
b.系統開機成功.....................................................92
4-2-2效能分析與比較................................................99
第五章結論與未來工作...............................................104
5-1問題討論........................................................104
5-2結論............................................................105
5-2未來工作目標....................................................106
參考文獻及資料.....................................................107

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