Audio containing speech (speech-based audio) is difficult to search. This paper describes an approach to the problem of searching speech-based digital audio using cross-modal information retrieval. While the current evidence-base is not yet sufficiently developed to confidently recommend self-help MBCT for specific clinical populations, it does suggest that this approach has promise, and further research is underway. These interventions provide audio or video mindfulness practice guidance, and attempt to compensate for the absence of the MBCT teacher(s) and class, through written, audio or video-based teaching, case vignettes, and examples of dialogue from MBCT classes. In this chapter we review five self-help MBCT interventions, some book-based and others multimedia/Internet-based. these challenges, and to become a helpful complement to class-based MBCT that enables wider access. Self-help MBCT has the potential to overcome at least some of. Furthermore, even when MBCT is available, some people may choose not to attend for practical reasons or due to discomfort in group settings. There are a number of obstacles to providing MBCT to all those who could potentially benefit from it, including cost, lack of MBCT teachers, and variable provision by health care organizations. Downloading of the abstract is permitted for personal use only. We also discuss some shortcomings of proposed techniques and list open problems that still do not admit a satisfactory solution.Р’В© (1999) COPYRIGHT SPIE-The International Society for Optical Engineering. We point to new issues raised by the problem of authentication of multimedia content. In this paper we survey different types of fragile and content-based authentication watermarking techniques that have been proposed in the literature. There are basically two types of watermarks that have been proposed for purposes of authentication, Fragile Watermarks and Content-based Authentication Watermarks. One such class of techniques is based on digital watermarks and in this paper, we focus on such. Subsequently, there have been many authentication techniques for multimedia objects that have been recently proposed. The recent proliferation of digital multimedia content has raised the issue of authentication techniques for multimedia content that is composed of still images, video and audio.

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