Title: Study of finite word-length effect on the performance of watermarking methods

Authors: Himanshu Agarwal; Balasubramanian Raman

Addresses: Department of Applied Science (Mathematics), Maharaja Agrasen Institute of Technology, Rohini-110086, Delhi, India ' Department of Computer Science and Engineering, Indian Institute of Technology Roorkee, Roorkee – 247667, India

Abstract: This present paper represents a simple framework for the novel study of the effect of finite word-length (FWL) on the performance of different watermarking methods in the computer environment. We have evaluated the performance of discrete wavelet transform (DWT) and singular value decomposition (SVD)-based watermarking methods at different word-lengths and found a reliable word-length (the word-length up to which change in the performance is significant and beyond this, is unnoticeable) for each watermarking method. The reliable word-length can be used as a new benchmark for comparing different watermarking methods for their real-time implementation, where optimisation with respect to memory, implementation area, performance, and power consumption are the foremost demand.

Keywords: hardware watermarking; finite word length; FWL; singular value decomposition; SVD; discrete wavelet transform; DWT; reliable word length; digital signal processing; DSP; security.

DOI: 10.1504/IJCVR.2015.068802

International Journal of Computational Vision and Robotics, 2015 Vol.5 No.2, pp.112 - 129

Received: 30 Nov 2013
Accepted: 20 Sep 2014
Published online: 13 Apr 2015 *

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