In this research work, various audio watermarking techniques have been studied and investigated. A novel audio watermarking method is proposed in which watermark is added transparently after ADPCM (Adaptive Differential Pulse Code Modulation). In the proposed scheme we have used random sample instead of fixed or low frequency carriers to embed the watermark into the audio bit stream. Proposed t...

An audio watermarking technique based on complementary filter band division is developed by Andrew Sung and me, Dackson Lam, as the final year project. This report presents the workings and results of the project in details. It has shown that audio watermarking is chosen for investigation due to its recentness and importance to the audio recording industry. Then, the report provides the backgro...

Watermarking is highly demanding in recent times for the protection of multimedia data in network environment from illegal copying, violation of copyright, authentication etc (Hartung & Kutter,1999), while compression of multimedia signals is essential to save storage space and transmission time. Hence, it is needless to mention the importance of watermarking on compressed data. However, the wo...

Contemporary information age facilitates easy duplication, manipulation and distribution of digital content. This has resulted in the necessity for safe guarding the rightful ownership of digital images. Copyright protection and content authentication of digital images have turned out to be a pressing problem to content owners and distributors. Digital watermarking offered an effective solution...

Digital watermarks have been proposed in recent literature as a means for copyright protection of multimedia data. In this paper we address the capability of invisible watermarking schemes to resolve copyright ownership. We show that, in certain applications, rightful ownership cannot be resolved by current watermarking schemes alone. Specifically, we attack existing techniques by providing cou...

In this paper, a novel high dynamic range (HDR) image zero-watermarking algorithm against the tone mapping attack is proposed. order to extract stable and invariant features for robust zero-watermarking, shift-invariant shearlet transform (SIST) used HDR image. Firstly, converted CIELAB color space, L component selected perform SIST obtaining low-frequency subband containing structure informati...

In this paper, we propose an improved autocorrelation function (ACF) based watermarking. The autocorrelation function based watermarking has been known to be one of the effective watermarking schemes that are resilient to geometric transform attacks. In this watermarking scheme, both the peaks in the autocorrelation function of a marked image and the embedded watermark should survive after vari...

The algorithm of discrete wavelet transform is developed to achieve the integrity authentication of color image contents through embedding watermarking. Firstly, a new watermarking image is generated with the XOR between the original binary watermarking and the image which is processed with Hankel transform. When the watermark is embedded, the original image color is converted first and the bri...

Software watermarking involves embedding a unique identifier within a piece of software, to discourage software theft. The global revenue loss due to software piracy was estimated to be more than $50 billion in 2008. We survey the proposed software watermarking algorithms based on graph encoding. Graph based watermarking schemes, like other watermarking schemes, can be divided into two groups: ...

This paper proposed a digital watermarking algorithm based on discrete wavelet transform (DWT), which can achieve the purpose of embedding hidden watermarks by decompose three-level wavelet of image and decompose bit-plane of watermarking gray scale image by Arnold scrambling transformation. Layer adaptive threshold and quantizer were referenced in this algorithm, and which adaptive selected co...