Study on digital watermark without detection error using soft-decision decoding for linear codes

2016 Fiscal Year Final Research Report

• Project/Area Number: 26330157
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Information security
• Research Institution: Okayama University
• Principal Investigator: Kusaka Takuya (甲本卓也) 岡山大学, 自然科学研究科, 講師 (00336918)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 電子透かし / 誤検出 / 線形符号 / 復号失敗 / 量子化誤差

Outline of Final Research Achievements

A method which uses a set of the minimum weight codewords of Reed-Muller codes　and extended BCH codes as an embedded information for digital watermark system　is proposed. By using cases of decoding failure of decoding algorithms, the　probability of erroneous detection can be reduced. The effectiveness of the　proposed method is assured by computer simulations.
In addition, effects of quantization errors in the floating number operations in soft-in/soft-out decoding algorithms is evaluated by simulations. The simulation results show that effects are negligible for the digital watermarks. 　By using the proposed methods, the digital watermark systems which have small erroneous detection probability can be implemented.

Free Research Field

符号理論