Light weight MP3 watermarking method for mobile terminals

ABSTRACT

This paper proposes an MP3 watermarking method that is applicable to a mobile terminal with limited computational resources. Considering that the embedded information is copyright information and metadata, which should be extracted before playing back, the watermark detection process should be executed quickly. However, conventional methods cannot detect a digital watermark at high speed. Thus, this paper proposes that scalefactor values in MP3 data be altered so as not to spoil audio quality. Evaluation tests show that the proposed method is capable of embedding 3bits/frame information and detecting at very high speed without degrading audio quality. Finally, this paper describes an application example of our proposal for authentication with a digital signature.

REFERENCES

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INDEX TERMS

Primary Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.5 Sound and Music Computing
          Subjects: Signal analysis, synthesis, and processing

General Terms:
Design, Management, Performance, Verification

Keywords:
MP3, mobile terminal, scalefactor, watermarking