| Summary: | 碩士 === 立德大學 === 應用資訊研究所 === 96 === Be different from the traditional methods of the cell phone to obtain music data (MIDI, WAVE, the MP3 etc) by such as transmission line, Bluetooth, infrared and message...etc. In this study the mainly aim is to integrate existing two-dimensional barcode (QR Code) and MIDI music file into the 2D barcode music exchange system. Expect to reach the purpose that turns mobile music data to exchange.
In the study, the function is divided into two parts to discuss in music exchange system. One is processing of the music files; the other is the two-dimensional barcode decoding part.
In music file aspect, we proposed a novel application called MEP(Melody Extrcation Program) to extract the main melody.We attempt to delete the nonessential information in music file, and extract the main melody to reduce capacity under the principle that as far as possible keeps the original melody. Then we carry on these musical notes data and necessary data (as rhythm) to make the simple encoding to shorten its capacity again, save it as one musical note data file and encode the musical note data into the two-dimensional barcode. In the two-dimensional barcode's decoding aspect, the system, which we proposed divides into two stages. The first stage, we decode the message of the musical note data of the main melody of music file after retrieve the two-dimensional barcode containing musical note data; in the second stage, transform these musical note data into the standard MIDI files, and broadcasts in the cell phone.
The result of this study mainly can use in the record audition or take application of the mobile phone ring-tone. For one thing, because it can extract the main melody of music file, we can resolve the support problem of the handset ring-tone. For the other thing, we used two-dimensional barcode to be "container" of the musical note data, so we can reach the purpose of the mobile application. Music file obtained become easier, the user does not need to make use of the cell phone to download which can saves time and money. We also do not need transmission line because the transmission is not through personal computer.
Under the integrated application of this system, if some music store such as sold field or the record shop can use this system, they not only can reduces cost of the audition equipment, let the consumer be able to hear all songs that the store sells (It only need the barcode to printout), but also can provide audition opportunity to each person at the same time. Because the existing audition equipment is impossible to let many people use at the same time (the store may only provide several sets to let consumer audition). Furthermore, the consumer also does not need to treat in audition equipment's side, because he can listen music by the handset everywhere, reach the purpose of the mobile application.
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