Watermarked Movie Soundtrack Finds the Position of the Camcorder in a Theater

被引:28
作者
Nakashima, Yuta [1 ]
Tachibana, Ryuki [2 ]
Babaguchi, Noboru [1 ]
机构
[1] Osaka Univ, Grad Sch Engn, Osaka, Japan
[2] IBM Japan Ltd, Tokyo Res Lab, Kanagawa, Japan
关键词
Audio watermarking; movie soundtrack; prevention of movie piracy; recording position estimation; AUDIO; ROBUST;
D O I
10.1109/TMM.2009.2012938
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In recent years, the problem of camcorder piracy in theaters has become more serious due to technical advances in camcorders. In this paper, as a new deterrent to camcorder piracy, we propose a system for estimating the recording position from which a camcorder recording is made. The system is based on spread-spectrum audio watermarking for the multichannel movie soundtrack. It utilizes a stochastic model of the detection strength, which is calculated in the watermark detection process. Our experimental results show that the system estimates recording positions in an actual theater with a mean estimation error of 0.44 in. The results of our MUSHRA subjective listening tests show the method does not significantly spoil the subjective acoustic quality of the soundtrack. These results indicate that the proposed system is applicable for practical uses.
引用
收藏
页码:443 / 454
页数:12
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