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This paper proposes an inaudible and robust audio-information-hiding scheme based on the singular-spectrum analysis (SSA) and a psychoacoustic model. SSA is used to decompose the host signals into several additive oscillatory components. The hidden information is embedded into the host signals by modifying amplitudes of some oscillatory components. To satisfy the inaudibility, we propose a novel method...
This paper proposes an audio watermarking scheme based on singular-spectrum analysis (SSA) and differential evolution. In our framework, a watermark is embedded into an audio signal by modifying the amplitude of some oscillatory components which are decomposed by SSA, and a parameter set for the modification is determined by differential evolution. Test results showed that, although there is a trade-off...
This paper proposes the unification of the codeexcited linear prediction (CELP) codec process with watermarking based on formant tuning. The serial problem in atermarking and then encoding with the CELP codec was thereby reduced by using the proposed method which also ncreased the bit detection rate. We took advantage of two key properties: I) humans do not perceive alterations applied to formants...
This paper proposes an audio watermarking method based on dynamic phase coding and error control coding. The technique of quantization index modulation is employed for embedding watermarks into the phase spectrum of audio signals. Since most of the audio information is distributed in moderately low frequencies, to increase robustness, this frequency region is chosen for embedding watermarks. Phase...
Illegal use of digital technologies has brought a series of problems in speech protection and authorization. Digital watermarking can effectively solve these problems by embedding watermarks into the host signals. This paper proposes a hybrid watermarking method for speech signals based on the concepts of formant enhancement (FE) and cochlear delay (CD). This hybrid method utilizes the source-filter...
We propose a method of speech watermarking based on modifications to line spectral frequencies (LSFs) of original speech. LSFs were derived from each frame with linear prediction (LP) analysis and watermarks were embedded into them by using the quantization index modulation (QIM) of different quantization steps. We took into consideration inaudibility and robustness that were influenced by minor modifications...
Audio data hiding techniques have been applied various applications such as audio watermarking and steganography. In this paper, we propose an audio data hiding method based on the phase information of the modulated complex lapped transform (MCLT) coefficients and evaluate the performance in terms of audio quality and robustness. To embed and extract the data, the proposed technique modifies the phases...
There have recently been serious social issues involved in multimedia signal processing such as malicious attacks and tampering with digital audio/speech signals. Fragile speech watermarking is a technique that enables the detection of tampering with the original signals. We previously proposed an inaudible digital-audio watermarking approach based on cochlear delay. We investigated how the proposed...
This paper proposes an audio-data hiding scheme for amplitude-modulation (AM) radio broadcasting systems. The digital-audio method of watermarking based on cochlear delay (CD) that we previously proposed is employed in this scheme to send an inaudible message. We investigate the feasibility of a data-hiding scheme in the AM domain by applying the method of CD-based inaudible watermarking. The proposed...
There have recently been serious social issues involved in multimedia signal processing such as digital rights management, secure authentication, malicious attacks, and tampering with digital audio/speech signals. Reversible watermarking is a technique that enables these signals to be authenticated and then restored to their original signals by removing watermarks from them. We previously proposed...
We investigated how the proposed approach with inaudible digital-audio watermarking based on cochlear delay (CD) could be implemented to produce an efficient architecture to further reduce embedding limitations. We also improved our approach by controlling parameter b for time varying CD filters and designing a cascade architecture for these filters. The results revealed that the improved method could...
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