By Ingemar Cox, Matthew Miller, Jeffrey Bloom, Mathew Miller
electronic watermarking is a key factor to copyright security. It offers an answer to unlawful copying of electronic fabric and has many different priceless purposes equivalent to broadcast tracking and the recording of digital transactions. Now, for the 1st time, there's a ebook that focuses solely in this interesting know-how. electronic Watermarking covers the the most important study findings within the box: it explains the rules underlying electronic watermarking applied sciences, describes the necessities that experience given upward thrust to them, and discusses the various ends to which those applied sciences are being utilized. therefore, extra basis is laid for destiny advancements during this box, aiding the reader comprehend and count on new techniques and functions. * Emphasizes the underlying watermarking rules which are appropriate for all media: photographs, video, and audio. * Discusses a wide selection of functions, theoretical ideas, detection and embedding innovations and the most important homes of electronic watermarks--robustness, constancy, info payload, and safety * Examines copyright security and plenty of different purposes, together with broadcast tracking, transaction monitoring, authentication, replica keep an eye on, and equipment keep an eye on. * offers a sequence of targeted examples referred to as "Investigations" that illustrate key watermarking recommendations and practices. * contains an appendix within the ebook and on the net containing the resource code for the examples. * encompasses a complete word list of watermarking terminology
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Extra resources for Digital Watermarking
This is the most direct and least intrusive method of automated broadcast monitoring. It does not require the introduction of any associated information into the broadcast, and therefore does not require changes to advertisers’ workﬂow. In fact, it does not require any cooperation with the advertisers or broadcasters. However, there are a number of potential problems with implementing passive monitoring systems. First, comparing the received signals against a database is not trivial. In principle, we would like to divide the signals into recognizable units, such as individual frames of video, and search for them in the database.
The term hiding here can refer to either making the information imperceptible (as in watermarking) or keeping the existence of the information secret. Some examples of research in this ﬁeld can be found in the International Workshops on Information Hiding, which have included papers on such topics as maintaining anonymity while using a network  and keeping part of a database secret from unauthorized users . These topics deﬁnitely fall outside our deﬁnition of watermarking. ” It is the art of concealed communication.
When a player sees a never-copy watermark, it checks to determine whether it is playing a copy or an original. This can be done in a variety of ways, such as by checking whether the Work is properly encrypted or by looking for a special signature on the media. If it is playing a copy, the player shuts down. 4 illustrates the interaction of encryption, record control, and playback control in a world of legal compliant and noncompliant devices. A legal, encrypted copy of a Work, such as a DVD purchased from a video store, can be played on a compliant player, but not on a noncompliant player, because the noncompliant player cannot decrypt it.