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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 鄭士康 | |
| dc.contributor.author | Yi-Chien Wang | en |
| dc.contributor.author | 王奕謙 | zh_TW |
| dc.date.accessioned | 2021-06-13T02:16:16Z | - |
| dc.date.available | 2007-02-27 | |
| dc.date.copyright | 2007-02-27 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-02-14 | |
| dc.identifier.citation | [1] ISO/IEC 1172-3 1993, “Information Technology – Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to About 1.5Mbits/s – Part3: Audio”, 1992.
[2] Marina Bosi, Richard E. Goldberg, “Introduction to Digital Audio Coding and Standards”, Kluwer Academic Publishers, 2003. [3] Karlheinz Brandenburg, “MP3 AND AAC Explained”, Proe.of the AES 17th International Conference on High Quality Audio Coding, Florence, Italy, 1999. [4] Marina Bosi, Richard E. Goldberg, “Introduction to Digital Audio Cding and Standards”, ch14, Kluwer Academic Publishers, 2003. [5] 吳炳飛，顏志旭，林煜翔，魏宏宇，張芷燕， “Audio Coding 技術手冊 MP3篇”，全華，民93。 [6] 李志益，MP3編碼器實做與效能探討，國立台灣大學資訊工程研究所碩士論文，2003年。 [7] 賴鴻志，MPEG-1 Layer 3 音訊解碼器於DSP晶片上之即時軟體實現，國立交通大學電機與控制工程研究所碩士論文，2001年。 [8] 林煜翔，MPEG-1 Layer III 音訊編解碼演算法最佳化及DSP晶片實現，國立交通大學電機與控制工程研究所碩士論文，2004年。 [9] Seonjoo Kim, Yi Li, Heesu Kim, Hanmook Choi and Youngbum Jang, “Real Time MPEG1 Audio Encoder and Decoder Implemented on a 16 bit Fixed Point DSP”, DSP Team, Micro Device Business, Semiconductor Division, Samsung Electronics Co. Ltd. [10] Manoj Kumar, Mohammad Zubair, “A High Performance Software Implementation of MPEG Audio Encoder”, IBM T.J. Watson Research Center, Yorktown Hgts, NY, USA, 1996. [11] Andreas Ehliar, Johan Eilert, “A hardware MP3 decoder with low precision floating point intermediate storage”, Computer Engineering, Dept. of Electrical Engineering at Linkopings university, 2003. [12] 黃興洋，AAC音訊編碼器設計與實現，國立台灣大學資訊工程研究所碩士論文，2004年。 [13] 秦昊，MPEG2 AAC解碼器在Scream DSP-16上的實作與加速研究，國立成功大學資訊工程學系碩士論文，2006年。 [14] 黃世緯，針對MPEG 2/4 AAC何HE AAC音訊編解碼器的核心技術設計，國立台灣大學電機工程學研究所博士論文。 [15] N. Ahmed and K.R.Rao, “Orthogonal Transform for Digital Signal Processing”, New York: Springer-Verlag 1975. [16] NoLL, P., “MPEG Digital Audio Coding”, IEEE Signal Processing Magazine, Volume: 14 Issue: 5, Sept. 1997. [17] B. Schaif, “Critical Bands”, in Foundations of Modern Auditory Theory, J. Tobias, ed., Academic Press, New York and London, 1970, pp.159-202.. [18] Ted Painter, “Perceptual Coding of Digital Audio”, Proceedings of IEEE, Vol. 88, No. 4, April 2000. [19] J. Johnston, “Estimation of perceptual entropy using noise masking critera”, in Proc. ICASSAP-88, May 1988. [20] M. Schroeder, B. S. Atal, and J. L. Hall,” Optimize digital speech coders by exploiting masking properties of the human ear”, J. Acoust. Soc. Amer. [21] Lai Hung-Chih, “Real-Time Implementation of MPEG-1 Layer 3 Audio on a DSP Chip”, National Chiao Tung university, June 2001. [22] Create ARM920T-S3C2410 User’s Guild, 2005. [23] Creator PreSOCes Development Kit, 2005. [24] http://www.mp3-tech.org/ [25] Yeh, Ping-Cheng, NTUEE DSP Design Laboratory – Fall 2006, Lecture 8, 9. [26] Andrea G. M. Cilio and Henk Corporaal, “Floating Point to Fixed Point Conversion of C Code”, Delft University of Technology, 1999. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/30802 | - |
| dc.description.abstract | MP3是現今最流行的音樂檔案格式，隨著各式各樣的行動裝置出現，MP3不只是能在電腦上播放與壓縮，播放MP3的產品在日常生活中已是隨處可見的數位產品，而具有將音樂壓縮編碼成MP3的消費性電子產品也因嵌入式系統的日益發達而有了更多的發揮空間。
本論文將一套開放原始碼的MP3 編碼器從PC 上實作到嵌入式系統上，利用Linux當作嵌入式系統的作業系統，主要以定點數取代浮點數運算的方法來加快執行速度，附帶進行數學函式的化簡，簡化analysis filter的演算法和去掉aliasing reduction，使執行更快速。本論文著重在加速的方法與得到的效能改進，所得聲音因加速處理而稍微有些雜訊不是此論文重點。最後把加速前後的速度作一比較。 | zh_TW |
| dc.description.abstract | MP3 is now the most popular music format. With the appearance of various mobile devices, MP3 is not only played and compressed on the computer. The digital products which played MP3 have been everywhere in the daily life. Because of the development of the embedded system, the commercial electronic products which used in music compress encoding can make further progress.
This thesis implements an open source MP3 Encoder on an embedded system. With Linux as the operating system in the embedded system, the fixed point operation is used to increase the executing speed. Besides, the simplification of math functions and algorithms of analysis filter and the reduction of aliasing reduction are also applied to accelerate further. This thesis focuses on the method of speeding up the program in the embedded system. The noise of sound caused by acceleration is not a key point of this thesis. Finally, I will compare the results before and after the acceleration.. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T02:16:16Z (GMT). No. of bitstreams: 1 ntu-96-R93921091-1.pdf: 1228219 bytes, checksum: e17fa7e46dd86875cdb55ab4c076580b (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | 第一章 緒論................................................1
1.1 研究背景與動機......................................1 1.2 文獻回顧............................................1 1.3 章節概述............................................2 第二章 MP3編碼理論.........................................3 2.1 數位音訊處理........................................5 2.2 分析子頻帶濾波器....................................6 2.3 改良式離散餘弦轉換(MDCT)............................8 2.4 聲響心理模型.......................................11 2.5 位元分配及量化.....................................19 2.6 位元串格式.........................................26 第三章 嵌入式Linux........................................31 3.1 SOC嵌入式 Linux的發展與系統架構....................31 3.2 系統開發版.........................................36 3.3嵌入式 Linux的開發環境.............................40 3.4嵌入式 Linux的檔案系統.............................43 第四章 系統實作與效能加速.................................47 4.1 MP3編碼器實作......................................47 4.2 定點數運算.........................................48 4.3 數學運算函式的化簡.................................50 4.4 演算法化簡.........................................52 4.5 MP3編碼過程化簡....................................55 4.6 效能探討...........................................56 第五章 結論...............................................58 參考文獻..................................................59 | |
| dc.language.iso | zh-TW | |
| dc.subject | 定點數 | zh_TW |
| dc.subject | 嵌入式系統 | zh_TW |
| dc.subject | 浮點數 | zh_TW |
| dc.subject | 量化 | zh_TW |
| dc.subject | 編碼 | zh_TW |
| dc.subject | embedded linux | en |
| dc.subject | quantize | en |
| dc.subject | MDCT | en |
| dc.subject | encoder | en |
| dc.subject | MP3 | en |
| dc.title | MP31編碼器在嵌入式Linux上的實作與效能實作 | zh_TW |
| dc.title | Acceleration of an MP3 Audio Encoder Implemented on Embedded Linux | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 王勝德,陳宗宏 | |
| dc.subject.keyword | 編碼,量化,浮點數,定點數,嵌入式系統, | zh_TW |
| dc.subject.keyword | MP3,encoder,MDCT,quantize,embedded linux, | en |
| dc.relation.page | 61 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-02-14 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電機工程學研究所 | zh_TW |
| 顯示於系所單位： | 電機工程學系 | |
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