Audio Watermarking Scheme Based on Singular Spectrum Analysis and Psychoacoustic Model with Self-Synchronization

Figure 6

Examples of spectra of oscillatory components: the top-left panel is a spectrum of an audio signal, and the other panels show spectral of some oscillatory components. The numbers labeled on vertical axes are the orders of the components, which are indices of their associated singular values. Compared with the spectrum of the audio signal, the spectral of oscillatory components has narrower bandwidths.