Sistem Audio Watermarking Berbasis QIM dengan Teknik DWT-DCT-SVD-CPT

Authors

  • Allwinnaldo Allwinnaldo Fakultas Teknik Elektro , Telkom University
  • Gelar Budiman Fakultas Teknik Elektro , Telkom University
  • Ledya Novamizanti Fakultas Teknik Elektro , Telkom University

Keywords:

Audio Watermarking, QIM, DCT, SVD, CPT

Abstract

Makalah ini menyajikan rangkaian sistem audio watermarking yang mampu memiliki rasio robustness-distortion yang mengagumkan dan nilai data payload yang besar. Sistem audio watermarking mengadopsi metode quantization index modulation (QIM) bersama dengan discrete wavelet transform (DWT), discrete cosine transform (DCT), singular value decomposition (SVD), dan cartesian-to-polar transformation (CPT). Sistem bekerja diawali dengan DWT yang membagi sinyal host berdasarkan rentang frekuensinya, lalu mengubah nilainya ke domain frekuensi oleh DCT. Metode SVD mempartisi sinyal host domain frekuensi menjadi 3 submatriks U, V, dan S, kemudian nilai submatriks S diubah menjadi nilai polar menggunakan CPT, dan diakhiri dengan menyisipkan watermark kedalam nilai polar dari CPT menggunakan metode penyisipan QIM, sehingga menghasilkan sinyal audio ter-watermark. Hasil yang diharapkan yaitu sistem audio watermarking yang diusulkan dapat menghasilkan sinyal audio terwatermark yang tahan terhadap upaya peretasan, memiliki noise yang minimum, dan berkapasitas besar.

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Published

2020-03-20

How to Cite

[1]
A. Allwinnaldo, G. Budiman, and L. Novamizanti, “Sistem Audio Watermarking Berbasis QIM dengan Teknik DWT-DCT-SVD-CPT”, SENTER, pp. 250-259, Mar. 2020.

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