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Recently, 3G cellular phone that can take a movie has spread. And, 2Dcode has accurate readout and high operability. And it has spread as an information transmission means. However, the symbol is expanded and complicated when information of 2D codes increases. To solve these, 3D code was proposed. But it need the special equipment for readout, and specializes in the enhancing reality feeling technology. Therefore, it is difficult to apply it to the cellular phone. And so, we propose 3D code that can be recognized by the movie shooting function of the cellular phone. And, score information was encoded. We apply Gray Code to the property of music, and encode it. And the effectiveness was verified. In the recognition technique of proposed score information, the user takes a movie by using the cellular phone. And, movie is transmitted to the server. And, score information is restored by using identification information on the marker and the property of music. We developed the recognition of score information by applying the enhancing reality feeling technology and the property of music. The server processes are divided into two. The marker detection processing makes the input movie binary. And, the area candidate is extracted by figuring connected area and the circumscription rectangle. Afterwards, four vertex coordinates are calculated. The marker is detected by the template matching. The restoration processing of score information restores the score by using the frame rate, tempo and the display time of the marker. We experimented to evaluate the effectiveness of the system that developed. And, the effectiveness of the proposal marker was confirmed. Gray code was applied to the property of the score, three experiments are conducted, and the effectiveness was confirmed. At the first, we verified the difference of the recognition accuracy by the difference of the display. Next, we encode score information, and verify the restoration accuracy. Finally, we verified the difference of the recognition accuracy by the correlation. As a result of the experiment, we confirmed the effectiveness with a liquid crystal display. We confirmed it was able to be recognized 100% at a low tempo. We confirmed the rising of recognition rate when the marker's correlation was high. We verified the appearance rate of the note and the appearance rate of the note's difference. Figure 1 shows the appearance rate of the note. Figure 2 shows the appearance rate of the note's difference. As a result, it has been understood the note is widely distributed in the music scale. We confirmed distribution in difference –2~2. We encoded Do-Re-Mi by using a different method. And, we verified the recognition accuracy. From Table 1, we confirmed it was recognized by 100% at tempo 120. And we confirmed the Gray application code was recognized with the highest at tempo 360. We make Simple code with different correlation. We converted each Simple code into difference application code and Gray application code, and compared the recognition accuracy. From Table 2, the recognition rate has improved when Simple code of high correlation is converted into the Gray application code. But, the recognition rate has decreased when Simple code of low correlation. In this research, we proposed 3D code that is able to be recognized by the movie filming feature of the cellular phone. As a result of the experiment, the effectiveness of 3D-encoded at a low tempo was confirmed. The future, we use technologies other than GrayCode, and improve the accuracy of encoding that uses difference information.

3D Encoding of Musical Score Information and the Playback Method Used by the Cellular Phone