Regular Section
The Use of Highpass Filtered Time-Spread Echo for Pitch Scaling Detection
2014 Volume E97.A Issue 7 Pages 1623-1626
Details
2014 Volume E97.A Issue 7 Pages 1623-1626
An echo-hiding scheme is presented to detect the pitch variation due to playback speed modification. The inserted time-spread echo is obtained by convolving the highpass filtered audio with a gain-controlled pseudo noise sequence. The perceptual evaluation confirms that the embedded echo is virtually imperceptible. Compared with the Fourier magnitude modulation, the proposed scheme attains better detection rates.
