Proceedings ArticleDOI
Fragile speech watermarking scheme with recovering speech contents
Chia-Hsiung Liu,Oscal T.-C. Chen +1 more
- Vol. 2
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TLDR
In this paper, a location-variable content-dependent watermark generating mechanism is proposed to detect where in the recording the content is being replaced, inserted, or deleted, and an attempt is done to store partial reconstruction data in the LSBs of excitation signals in the G.1 speech codec, so that the original speech content may be reconstructed after counterfeiting.Abstract:
The wide use of digital speech recorders becomes a serious matter when they are involved in assisting with court rulings. How to distinguish if a recorded content is valid or not becomes a life-or-death question. In light of this concern, least significant bits (LSB) of excitation signals would be used as fragile watermarks in the hybrid speech vocoder. In addition, a location-variable content-dependent watermark generating mechanism is proposed. Such location-variable content-based watermark would allow users to detect where in the recording the content is being replaced, inserted, or deleted. Lastly, an attempt is done to store partial reconstruction data in the LSBs of excitation signals in the G.723.1 speech codec, so that the original speech content may be reconstructed after counterfeited. The proposed system is demonstrated to be a reliable system, with test results showing that a recording with watermarks has a perceptual evaluation of speech quality (PESQ) value down 0.2, while the accuracy in detecting faked regions can be up to 97.45%.read more
Citations
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Journal ArticleDOI
Content-Dependent Watermarking Scheme in Compressed Speech With Identifying Manner and Location of Attacks
Oscal T.-C. Chen,Chia-Hsiung Liu +1 more
TL;DR: A content-dependent watermarking scheme suitable for codebook-excited linear prediction (CELP)-based speech codec that ensures the integrity of compressed speech data.
Journal ArticleDOI
An overview of digital speech watermarking
TL;DR: An overview of digital speech watermarking is presented including issues of robustness, capacity and imperceptibility, which highlights the related challenges in the real world, research opportunities and future works in this area, yet to be explored fully.
Journal ArticleDOI
Speech authentication by semi-fragile speech watermarking utilizing analysis by synthesis and spectral distortion optimization
Bin Yan,Yin-Jing Guo +1 more
TL;DR: Experimental results show that the proposed AbS based method can effectively reduce the difference between the watermarked IS parameter and the extracted IS parameter when there is no attacks.
Proceedings ArticleDOI
Psycho-acoustic model-based message authentication coding for audio data
TL;DR: Experimental results show that the proposed algorithm provides both a high level of distinction between perceptually different audio data and a high robustness against signal transformations that do not change the perceived information.
Journal ArticleDOI
Efficient audio integrity verification algorithm using discrete cosine transform
Sabry S. Nassar,Nabil M. Ayad,Hamdy M. Kelash,Hala S. El-sayed,Mohsen A. M. El-Bendary,Fathi E. Abd El-Samie,Osama S. Faragallah +6 more
TL;DR: A promising approach for integrity verification of recorded audio signals using discrete cosine transform based on self embedding concept which embeds block-based marks extracted from the same audio signal after being transformed into 2D format into other blocks according to a specific algorithm.
References
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Journal ArticleDOI
Speech coding: a tutorial review
TL;DR: The objective of this paper is to provide a tutorial overview of speech coding methodologies with emphasis on those algorithms that are part of the recent low-rate standards for cellular communications.
Proceedings ArticleDOI
Fragile speech watermarking based on exponential scale quantization for tamper detection
Chung-Ping Wu,C.-C. Jay Kuo +1 more
TL;DR: A fragile speech watermarking scheme of low complexity that is based on the modified odd/even modulation scheme with exponential scale quantization and a localized frequency masking model while assuring no mismatch between quantization steps used in watermark embedding and detection is proposed.
Proceedings ArticleDOI
Fragile speech watermarking for content integrity verification
Chung-Ping Wu,C.-C.J. Kuo +1 more
TL;DR: The exponential-scale odd/even modulation is better in detecting localized content alteration while linear additive watermarking is more tolerant to low bit-rate speech coders such as the CELP coders.
Proceedings ArticleDOI
A 0.75 kbps speech codec using recognition and synthesis schemes
TL;DR: A very low bit-rate speech codec is proposed using recognition and synthesis schemes and the time-domain pitch-synchronous overlapped addition scheme is utilized to synthesize a high-quality speech waveform.