2008年11月7日 星期五
2008年11月6日 星期四
2008_11_6電腦音樂與音訊處理課程_MPEG Audio Coder簡介
這幾周的課我會講有關MPEG Audio Coder的基本概念, 內容涵蓋MP3到HE-AAC. 不過投影片包含太多東西, 連File Format都有, 所以我會skip一些這類跟演算法無關的部分. 這份資料是我2007年在光寶科技所做的talk. 希望同學對於傳統與現在的主流音訊編碼技術可以有一個深入淺出的認識.
感謝當初維城, 小鄔與其偉的幫忙, 完成這一份資料.
2008年11月4日 星期二
2008_10_29在MATLAB的演講: Electronic System Level Simulation/Verification in Heterogeneous Environment Using MATLAB/Simulink and FPGA
演講的題目主要是實驗室中所做的把SystemC, FPGA與Matlab/Simulink合起來 一起進行simulation. 我們用很簡單的JPEG encoder來當例子. JPEG的source code是網路上下載的open source. 經過簡單的修改後嵌入到SystemC模組裡, 並且把DCT搬到外面來, 如此可以驗證在三個不同的DCT實做是否一致. 以FPGA來代替一般的HDL Simulato, 速度當然很快.
感謝巴菲特與DNA的協助, 這個demo很成功. 下面是demo的snapshot. webcam對著aaa的背景, 然後用上面的工具壓一張JPEG影像.
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當天有一百多人來聽, 演講後也有約7,8人來問, 其中還有Sunplus Core的技術副總監, 因為時間有限而且我知道他們的DSP是跟工研院STC技轉來的, 所以我跟他說以後我們會跟STC合作, 以後三方可以就此一議題來合作.
題目與摘要如下:
Electronic System Level Simulation/Verification in Heterogeneous Environment Using MATLAB/Simulink and FPGA
Abstract
Electronic System Level (ESL) design has become the most popular methodology for designing highly complex VLSI systems such as SoC. Instead of working on implementation details, transaction level modeling (TLM) has been considered a powerful method to speed up design process by building a reference model on which hardware and software development can be based. Currently, SystemC2.2 and TLM2.0 library have become IEEE/OSCI standard tools.
However, since modules/parts in a system may be developed separately using different tools in different design stages at different speeds of progress, it is necessary to be able to simulate and verify the system in such a heterogeneous environment. In this talk, system level simulation incorporating SystemC/TLM, MATLAB/Simulink and FPGA is presented. MATLAB which is usually used for algorithm development may sit at the highest abstraction level while FPGA which is used in emulation usually sits at the much lower abstraction level. Hence, simulation/verification across different abstraction levels can be achieved. The consistency of a module designed in different abstraction levels can be maintained. As such, functionality correctness of system can be improved.
投影片在此:
System Level Design/Simulation/Verification Using MATLAB/Simulink and FPGA
進度報告-冠廷
內容大概是說利用Chroma Feature來做歌曲的特徵
再經由把這些Chroma Feature分群然後做統計來當做一首歌的特徵
註記:
1.使用K-Mean好嗎?
2.這種方法比較類似於找類似風格的歌曲