An Audio Watermarking Method Using Pitch-Transformed Sound of Original Music

In this paper, we propose an audio watermarking method using processed sound of music. For audio signals, watermarks are embedded in time domain or Fourier domain. In existing methods, it is required that noises are not perceived in stego signal. On the other hand, in the proposed method, there is no problem even if a different sound from host signal is perceived when stego signal is maintained as music. Accordingly, we use watermark signal which has same timbre as host signal by processing original music data itself. In this paper, we use pitch-transformed sound as processed sound of original music data and we intend to improve the subjective sound quality of stego signal.