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研究生:鄭永森
研究生(外文):Yung-Shen Cheng
論文名稱:H.264解碼器上使用輸出緩衝區與動態頻率調整之省電設計
論文名稱(外文):A Low Power Design for a H.264 Decoder based on Dynamic Frequency Scaling using Output Buffers
指導教授:梁文耀梁文耀引用關係
指導教授(外文):Wen-Yew Liang
口試委員:賴槿峰陳彥霖
口試委員(外文):Chin-Feng LaiYen-Lin Chen
口試日期:2012-07-17
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:電資碩士在職專班研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:50
中文關鍵詞:H.264影像解碼動態頻率調整節能
外文關鍵詞:H.264 video decodingdynamic frequency scalingenergy saving
相關次數:
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  • 收藏至我的研究室書目清單書目收藏:0
多媒體應用的省電設計變得更加重要,因為它們在許多嵌入式系統中愈來愈多被使用。在行動多媒體系統中電池壽命成為相當關鍵的因素。由於H.264影片對於效能需求的變動性,我們可以充分地利用閒置的解碼時間以得到節能。在這篇論文中,我們將介紹一針對H.264影像解碼的簡易動態頻率調整機制,透過輸出緩衝區使處理器的所有閒置時間都能夠得到充分地利用。我們的控制機制會觀察輸出緩衝區被佔用多少,並相應地調整系統的頻率。而視框的解碼時間以視框的資料量及類型來加以預測。其特點是調整緩衝區容量最小化來得到最大的節能,且保證滿足即時限制和服務品質。實驗結果顯示這個機制可以大量減少在影像解碼的能源消耗。

Power-efficient design of multimedia applications becomes more important as they are increasingly used in many embedded systems. Battery lifetime become a critical factor in mobile multimedia systems. Due to the variability of the H.264 data streams, we can achieve energy saving by fully utilizing the idle time left in the decoding process. In this thesis, we introduce a simple dynamic frequency scaling mechanism for H.264 video decoding, allowing all idle intervals of the processor to be fully exploited with output buffers. The mechanism allows the system to adjust the system frequency according to the number of output buffers which are available. The decoding time of the frame is predicted by the size and the type of the frame. Our goal is to minimize the buffer size which could maximize the saved energy, with guaranteed real-time constraints and quality of service. Experimental results show that the proposed mechanism is able to achieve more energy reduction for video decoding.

中文摘要 i
英文摘要 ii
誌 謝 iii
目 錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 1
1.3 研究範圍 1
1.4 論文編排 2
第二章 相關文獻探討 3
2.1 動態電壓頻率調整 3
2.2 工作量預測技術 4
2.3 H.264視訊壓縮標準簡介 6
2.4 AVI格式解析 9
第三章 研究議題與方法 14
3.1 研究方法 14
3.2 解碼系統架構 18
3.3 解碼時間預測與頻率對映 20
3.4 DFS模組 24
3.5 視框丟棄率 30
第四章 實驗結果評估及分析 32
4.1 實驗系統環境 32
4.2 實驗H.264影片特性 35
4.3 實驗比較不同的DVS演算法 36
4.4 實驗結果 39
第五章 結論 41
參考文獻 42
附錄 45


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[23] RIFF:http://zh.wikipedia.org/wiki/Resource_Interchange_File_Format
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