Analysis of QIM-based audio watermarking using LDPC codes

In this paper, we analyze audio watermarking methods based on quantization index modulation and low-density parity-check (LDPC) codes. We found that dither modulation (DM) can achieve better performance using half-rate Margulis LDPC code even better than some low-rate codes. Then, we propose a schem...

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Bibliographic Details
Main Authors: Martinez-Noriega, R., Nakano, M., Kurkoski, B., Yamaguchi, K., Kobayashi, K.
Format: Conference Proceeding
Language:English
Subjects:
AWGN
Delta modulation
Error correction codes
Image coding
Modulation coding
Parity check codes
Quantization
Robustness
Signal processing
Watermarking
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Summary:In this paper, we analyze audio watermarking methods based on quantization index modulation and low-density parity-check (LDPC) codes. We found that dither modulation (DM) can achieve better performance using half-rate Margulis LDPC code even better than some low-rate codes. Then, we propose a scheme based on LDPC codes and DM with distortion-compensation (DC) property which has a robustness benefit of 6 dB versus uncoded case, 2 dB versus algebraic codes, 1 dB versus DM with LDPC code. In DM with DC property, we show that it is possible to achieve. 5 dB better robustness using a scale parameter alpha lower than the theoretically optimal and LDPC codes. Finally our proposal was evaluated against more practical attacks. These results show that our scheme could be a good option for robust watermarks.
ISSN:1548-3746
1558-3899
DOI:10.1109/MWSCAS.2009.5235992