Robust algorithm for watermark recovery from cropped speech

Gurijala, Aparna; Deller, J.R.

doi:10.1109/icassp.2001.941180

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…During last decade, different applications of digital watermarking have been proposed is various fields such as text [5], audio [6][7][8][9] , image [10,11] and video [12,13]. These applications can be classified from different aspects.…”

Section: Intruductionmentioning

confidence: 99%

“…After that, digital watermarking was applied in many ways, but this technique did not attract scientists' attention as an important research issue until 1990. At the beginning of 1990, it was attracting attention as an interesting research subject which has retained its importance until now [4].During last decade, different applications of digital watermarking have been proposed is various fields such as text [5], audio [6][7][8][9] , image [10,11] and video [12,13]. These applications can be classified from different aspects.…”

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confidence: 99%

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Presenting a Novel Audio Watermarking Based on Discrete Wavelet Transform

Mosleh¹,

Setayeshi²,

Mosleh³

2011

IJCEE

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Abstract-Digital watermarking techniques are attracting attention as a proper solution to protect copyright for multimedia data. In this paper, we propose a new audio watermarking method, in wavelet coefficients in the way that human auditory system is not sensitive to it. The proposed method can embed the watermark data into levels 3-4 approximation coefficients of wavelet transform using echo and discrete Fourier transform. The extraction algorithm of the proposed method extracts two watermark sequences from watermarked data. The final watermark sequence is obtained by extracted sequence using a hidden key. The experimental results show that the proposed method is very robust to noise. In order to evaluate, the proposed method is compared with the methods based on FFT, Echo and AM Index Terms-Audio Watermarking, Discrete Fourier Transform (DFT) Discrete Wavelet, Transform (DWT) I. INTRUDUCTIONWith the recent development of digital information technology, all personal computer owners enjoy a multimedia processor, a vast band having access to the entire world and an interchangeable memory for digital information. Therefore, digital information is accessible to everyone, and they are distributed easily. With broadcasting information transfer by internet network, the firms can present their digital products by internet network. Although this technology development causes many works to do easy, it has caused some problem as next technologies. Existing different devices such as printing-machines and copying media make the copying of these data easy [1]. Now there are two standard methods to protect copyright of digital documents such as coding and digital signature.The major problem of coding method is that it does not protect the document placing in the stage after coding and is useable. In other words, the user, after applying certain key and decoding the document, can change document in any way or make unauthorized copies of it in numbers. So, document owner is not able to claims his right. If it is made a little change intentionally or not in digital document even one bit of it which uses digital signature to protect copyright, it Manuscript received February 14, 2011; revised July 11, 2011. Mahdi will be impossible for receiver to retrieve digital signature. As a result, the document will lose its credit easily [2].Studies show that the only solution to this problem is to add security information to document in such a way that it doesn't separate from document during its life time and also remains undetectable to document user as much as possible. One of the proper solutions is digital watermarking. Watermarking is a technique that embeds imperceptible and statistically undetectable information into digital data (e.g. video, images and audio signals). This embedded information contains certain information (signature, logo, ID number, etc) which uniquely related to the owner or distributer.Digital watermarking was invented by one of the Muzac firm engineers, Emil Hem brook, in 1954. In this invention an ID co...

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