基於相似度搜尋之音樂檢索系統

隨著網路發達與普遍化，數位音樂檔案種類繁多，如MP3 、WMA 、WAV、 MID等格式。隨著流行音樂與網路的結合，越來越多人使用MIDI音樂， MIDI （Musical Instrument Digital Interface），不管是在遊戲、動畫或作曲，都可見到MIDI檔的影子存在。MIDI檔的好處在於，使用者可以不用擁有實體樂器，身邊有台電腦或手機，就可以彈奏出美妙的音樂，讓音樂創作者，可即時寫譜，紀錄腦海中的旋律，但是如何讓作曲者，可從所有音樂資料庫裡，迅速找出想要的旋律片段或歌曲，方便創作，是本論文的研究目的。本論文開發一套音樂檢索系統，來管理音樂資料庫，讓使用者搜尋感興趣的檔案，提供虛擬鋼琴按鍵，方便使用者即時搜尋檔案，主要技術包括使用主旋律的提取、旋律標準化、相似度測量等方法，來提高音樂搜尋的速度與精準度。

關鍵字

旋律的提取；音樂檢索系統； MIDI檔案

並列摘要

With the popularity of the Internet, a wide variety of digital music files, such as MP3, WMA, WAV, MID and so on, are developed. More and more people are using MIDI format to access music on the Internet. For example, in computer games, animations or compositions, use you can see the existence of the MIDI format is that one of the advantages to use the MIDI format is that a user need not have a physical musical instrument .He/she can play understand music as long as he/she has a smartphone or computer nearby. This make a music creator easily record the melody in he/her mind. However, it is still inconvenient for a user to retrieve music form a MIDI database if he/she only remembers a piece of the melody in he/her mind. In this thesis, we show how to use this problem. We develop a music retrieval system in this thesis. This system provides facility to allow a user to retrieve music from a MIDI database by playing on a virtual keyboard. The main technology have includes extract to main melody, standardizing the melody and measuring the similarity between songs. In order to improve the accuracy and speed for music retrieval.