Browsing by Author "Krishnan, A."

Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    Challenges of Multimedia Watermarking Techniques
    (INFLIBNET Centre, 2005-02-02) Jayabalan, E.; Krishnan, A.; Pugazendi, R.
    Data transmitted through a network may be protected from unauthorized receivers by applying techniques based on cryptography. Only people who possess the appropriate private key can decrypt the received data using a public algorithm implemented either in hardware or in software. Fast implementation of encryption-decryption algorithms is highly desirable. Data-content manipulation can be performed for various legal or illegal purposes (compression, noise removal or malicious data modification). The modified product is not authentic with respect to the original one. The technology of multimedia services grows rapidly, and distributed access to such ser-vices through computer networks is a matter of urgency. However, network access does not protect the copyright of digital products that can be reproduced and used illegally. An efficient way to solve this problem is to use watermarks. A watermark is a secret code described by a digital signal carrying information about the copyright property of the product. The watermark is embedded in the digital data such that it is perceptually not visible. The copyright holder is the only person who can show the existence of his own watermark and to prove the origin of the product Reproduction of digital products is easy and inexpensive. In a network environment, like the Web, retransmission of copies all throughout the world is easy. The problem of protecting the intellectual property of digital products has been treated in the last few years with the introduction of the notion of watermarks.
  • Thumbnail Image
    Item
    Streaming Communication for Web Based Training
    (INFLIBNET Centre, 2005-02-02) Pugazendi, R; Krishnan, A.; Jayabalan, E
    Streaming audio became available on the Web in 1995, but with the development of the Synchronized Multimedia Integration Language (SMIL), the technology has reached a new level of maturity. SMIL is based on the XML standard, and allows audio, video, images, and text to be integrated. The implications for Web based pedagogy are tremendous. We now have the opportunity to do training on the desktop in a feature-rich open environment. We will give a basic background in streaming media technology, discuss the standards, the current state of the art, our experience with RealNetworks, how to take advantage of it in an intranet environment, and touch on future developments, including the integration of testing engines.
  • Thumbnail Image
    Item
    Streaming Media to Enhance Teaching and Improve Learning
    (INFLIBNET Centre, 2005-02-02) Pugazendi, R; Krishnan, A.; Jayabalan, E
    In a search for more natural way of learning, streaming media is one of the ways. One old Chinese statement says: “a picture is worth a thousand words if used correctly“. Today we can ask ourselves how many words worth a video sequence? The use of online courses continues to grow worldwide, yet it is still not clear whether such online learning environments enhance the learning outcome of students or even meet the level of success of traditional classrooms. Many online courses represent no more than electronic versions of traditional classes without, of course, face-to-face interaction between instructor and students. These electronic courses often contain Web materials that lack any significant level of creativity or interactivity . Cognitive research suggests that the addition of multimedia can actually improve the learning process if certain methods are employed. By using auditory and visual methods of presenting information, students can process that information more quickly, often fostering an enhanced learning process.