Advances in Audio Watermarking Based on Matrix Decomposition by Pranab Kumar Dhar & Tetsuya Shimamura
Author:Pranab Kumar Dhar & Tetsuya Shimamura
Language: eng
Format: epub
ISBN: 9783030157265
Publisher: Springer International Publishing
3.2 Proposed Watermarking Method
Let X = {x(n), 1 ≤ n ≤ L} be an original audio signal with L samples, W = {w(i), 1 ≤ i ≤ I} be a binary watermark sequence to be embedded into the original audio signal.
3.2.1 Watermark Preprocessing
To enhance the security of the proposed method, watermark sequence should be preprocessed first. The proposed method utilizes a Gaussian map, containing the chaotic characteristics to encrypt the binary watermark sequence for enhancing the confidentiality of the proposed method. It can be defined as follows:
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