4/14/2023 0 Comments Visual watermark 4.90 keyFurthermore, comparative analysis substantiates its superiority among other state-of-the-art methods. Moreover, it is demonstrated that the proposed algorithm is highly robust against numerous attacks. Simulation results ensure the imperceptibility of the proposed method for watermarked audios. ![]() Euclidean normalization is calculated from the 1st column of the Hessenberg matrix, which is further used for embedding and extracting the watermark. Next, PSHT is performed on each square matrix individually and a part of this transformed matrix of size m× m is selected and HD is applied to it. Then, host signal is divided into non-overlapping frames and the samples of each frame are reshaped into a square matrix. In our proposed algorithm, at first watermark image is preprocessed to enhance the security. This paper introduces a blind symmetric audio watermarking algorithm based on parametric Slant-Hadamard transform (PSHT) and Hessenberg decomposition (HD). ![]() Digital watermarking has been widely utilized for ownership protection of multimedia contents.
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