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Additive Data Insertion into MP3 Bitstream Using linbits Characteristics  

김도형 (인하대학교 전자공학과 DSP 연구실)
양승진 (인하대학교 전자공학과 DSP 연구실)
정재호 (인하대학교 전자공학과 DSP 연구실)
Publication Information
The Journal of the Acoustical Society of Korea / v.22, no.7, 2003 , pp. 612-621 More about this Journal
Abstract
As the use of MP3 audio compression increased, the demand for the insertion of additive data about copyright or information on music contents has been groved and the related research has been progressed actively. When an additive data is inserted into MP3 bitstream, it should not to happen any distortion of music quality or the change of file size, due to the modification of MP3 bitstream structure. In our study, to make these conditions satisfied, we inserted some additive data to bitstream by modifying some bits of linbits among the quantized integer coefficients having big values. At this time, we consider the characteristics of linbits and their distributions. As a result of subjective sound quality test through MOS test, we confirmed that the quality of MOS 4.6 can be achieved at the data insertion rate of 60 bytes/sec. Using the proposed method, it is possible to effectively insert an additive data such as copyright information or information about media itself, so that various applications like audio database management can be realized.
Keywords
MP3; linbits; MP3; Digital watermarking; Excess-15 quantized coefficients; Linbits; MOS test;
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