Speech Watermarking for Tampering Detection Based on Modifications to LSFs

Figure 5

Waveform and spectra differences between the original signal and the watermarked signal (LP order: th; quantization step: ). (a) Waveform of the original signal, (b) waveform of the watermarked signal: embed “1,” (c) difference in waveform, (d) spectrum of the original signal, (e) spectrum of the watermarked signal: embed “1,” and (f) difference in spectrum.

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