Methodologies and tools for watermark evaluation and benchmarking facilitate the development of improved watermarking techniques. In this paper, we want to introduce and discuss the integration of audio watermark evaluation methods into the well-known web service Watermark Evaluation Testbed (WET) [1]. WET is enhanced by using. A special set of audio files with characterized content and a colle...

Digital libraries allow users to access large amounts of organised audio information. Users of these libraries are able to collect required information, that is then stored and organised for later use. A useful feature of some digital libraries is the ability to create personal spaces within the library where users may collect and organise their information in an appropriate way for them. Some ...

We propose to use novel and classical audio and text signal-processing and otherwise techniques for “inexpensive” fast writer identification tasks of scanned hand-written documents “visually”. The “inexpensive” refers to the efficiency of the identification process in terms of CPU cycles while preserving decent accuracy for preliminary identification. This is a comparative study of multiple alg...

CAPTCHAs are computer-generated tests that humans can pass but current computer systems cannot. CAPTCHAs provide a method for automatically distinguishing a human from a computer program, and therefore can protect Web services from abuse by so-called “bots.” Most CAPTCHAs consist of distorted images, usually text, for which a user must provide some description. Unfortunately, visual CAPTCHAs li...

An audio platform game was created and evaluated in order to answer the question of whether or not an audio game could be designed that effectively conveys the spatial information necessary for persons with visual impairments to successfully navigate the game levels and respond to audio cues in time to avoid obstacles. The game used several types of audio cues (sounds and speech) to convey the ...

This paper describes a novel method for composing and improvisation with real-time chaotic oscillators. Recently discovered algebraically simple nonlinear third-order differential equations are solved and acoustical descriptors relating to their frequency spectrums are determined according to the MPEG-7 specification. A second nonlinearity is then added to these equations: a real-time audio sig...

IRI is an Interactive Remote Instruction multimedia system for distance learning. It integrates audio, video, shared applications and multiuser collaborative utilities. In this paper we concentrate on the process architecture and dynamic multicast group handling as they pertain to multimedia and show how they support robustness and short response time to user actions. IRI uses raw IP multicasti...

This article presents a method for restoring audio signals corrupted by impulsive noise such as clicks, bursts or scratches. The algorithm takes as input a degraded audio signal and automatically detects the locations of the degraded samples and replaces them with more appropriate values. Both steps (detection and interpolation) are based on the assumption that the signal can locally be modeled...

Article history: Available online 11 January 2012 0045-7906/$ see front matter 2011 Elsevier Ltd doi:10.1016/j.compeleceng.2011.10.010 q Reviews processed and proposed for publication ⇑ Corresponding author. Tel.: +86 20 3932 3332. E-mail address: [email protected] (Y. Liu). Computing has been evolved from number crunching to today’s cloud. Data are no longer numbers but information which needs...