Download Digital Watermarking : Techniques and Trends by Mohammad Ali Nematollahi, Chalee Vorakulpipat, Hamurabi PDF

By Mohammad Ali Nematollahi, Chalee Vorakulpipat, Hamurabi Gamboa Rosales

This ebook offers the state-of-the-arts program of electronic watermarking in audio, speech, picture, video, 3D mesh graph, textual content, software program, traditional language, ontology, community circulate, relational database, XML, and IPs. It additionally offers new and up to date algorithms in electronic watermarking for copyright safeguard and discusses destiny developments within the field.

Today, the unlawful manipulation of real electronic gadgets and items represents a substantial challenge within the electronic global. delivering an efficient answer, electronic watermarking will be utilized to guard highbrow estate, in addition to fingerprinting, improve the safety and proof-of-authentication via unsecured channels.

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Advances in nonlinear speech processing, 84–89. , M. Hagmüller, and G. Kubin. 2006. Speaker verification security improvement by means of speech watermarking. Speech Communication 48(12): 1608–1619. , M. Hagmüller, and G. Kubin. 2007. Speaker identification security improvement by means of speech watermarking. Pattern Recognition 40(11): 3027–3034. , et al. 2004. Speech watermarking for air traffic control. Watermark 8(9): 10. , G. B. Kleijn. 2009. Speech watermarking for analog flat-fading bandpass channels.

Three parameters of the echo signal are the candidates for hiding the data. They include the initial amplitude, the delay (or offset), and the decay rate. The data can be successfully hidden in the audio signal if their values are managed to keep 22 2 Audio Watermarking the imperceptibility of audio signal [14]. For this reason, the values of amplitude and decay rates should be set below the audible threshold of HAS. As an example, when the time difference between the original signal and the echo stays below 1 ms, there is no annoying effect on the audibility of the signal.

Here, the volume of the delayed signal is 10 % of the original one and the delay duration is 400 ms. Reverb: For simulation of rooms or building, reverb is utilized. Although it is similar to delay, it is shorter in delay time and reflections. , to play a mono-audio material on an stereo device, data is duplicated. The sampling rate of devices has been changed from 32 to 48 kHz and now even 96 kHz or sample size changes from 16 to 24 bit and vice versa. 1 kHz. 4 kHz. Inversion: inversion changes the sign of the samples, but the changes are imperceptible.

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