Browsing by Subject "multimedia"

Now showing 1 - 4 of 4
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    Collusion-resistant fingerprinting for multimedia in a broadcast channel environment
    (Texas A&M University, 2005-02-17) Luh, William
    Digital fingerprinting is a method by which a copyright owner can uniquely embed a buyer-dependent, inconspicuous serial number (representing the fingerprint) into every copy of digital data that is legally sold. The buyer of a legal copy is then deterred from distributing further copies, because the unique fingerprint can be used to trace back the origin of the piracy. The major challenge in fingerprinting is collusion, an attack in which a coalition of pirates compare several of their uniquely fingerprinted copies for the purpose of detecting and removing the fingerprints. The objectives of this work are two-fold. First, we investigate the need for robustness against large coalitions of pirates by introducing the concept of a malicious distributor that has been overlooked in prior work. A novel fingerprinting code that has superior codeword length in comparison to existing work under this novel malicious distributor scenario is developed. In addition, ideas presented in the proposed fingerprinting design can easily be applied to existing fingerprinting schemes, making them more robust to collusion attacks. Second, a new framework termed Joint Source Fingerprinting that integrates the processes of watermarking and codebook design is introduced. The need for this new paradigm is motivated by the fact that existing fingerprinting methods result in a perceptually undistorted multimedia after collusion is applied. In contrast, the new paradigm equates the process of collusion amongst a coalition of pirates, to degrading the perceptual characteristics, and hence commercial value of the multimedia in question. Thus by enforcing that the process of collusion diminishes the commercial value of the content, the pirates are deterred from attacking the fingerprints. A fingerprinting algorithm for video as well as an efficient means of broadcasting or distributing fingerprinted video is also presented. Simulation results are provided to verify our theoretical and empirical observations.
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    Enlightening lightning! Producing and directing a multimedia planetarium show
    (Texas A&M University, 2005-02-17) Fowler, Sarah Marie
    Starting with a group of lightning researchers, planetarium staff, and visualization specialists, an academically diverse group was formed through a grant from the National Science Foundation to develop a planetarium show on lightning. The show target audience is middle school aged children. The goal of the show is to teach lightning safety and lightning facts in an immersive environment. Through the use of video, an animated character, and a meteorologist, the curriculum is presented to the audience. I fulfilled the roles of producer and director through all aspects of production. My role also included maintaining group organization and communication throughout show production. This paper discusses my experiences in producing Enlightening Lightning! by starting with outlining the curriculum and finishing with putting it all together at the planetarium. The goal of this paper is to discuss the techniques and organizational methods used to manage a diverse group and produce a multimedia show.
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    Flow control of real-time unicast multimedia applications in best-effort networks
    (2009-05-15) Bhattacharya, Aninda
    One of the fastest growing segments of Internet applications are real-time mul- timedia applications, like Voice over Internet Protocol (VoIP). Real-time multimedia applications use the User Datagram Protocol (UDP) as the transport protocol because of the inherent conservative nature of the congestion avoidance schemes of Transmis- sion Control Protocol (TCP). The e?ects of uncontrolled ?ows on the Internet have not yet been felt because UDP tra?c frequently constitutes only ? 20% of the total Internet tra?c. It is pertinent that real-time multimedia applications become better citizens of the Internet, while at the same time deliver acceptable Quality of Service (QoS). Traditionally, packet losses and the increase in the end-to-end delay experienced by some of the packets characterizes congestion in the network. These two signals have been used to develop most known ?ow control schemes. The current research considers the ?ow accumulation in the network as the signal for use in ?ow control. The most signi?cant contribution of the current research is to propose novel end- to-end ?ow control schemes for unicast real-time multimedia ?ows transmitting over best-e?ort networks. These control schemes are based on predictive control of the accumulation signal. The end-to-end control schemes available in the literature are based on reactive control that do not take into account the feedback delay existing between the sender and the receiver nor the forward delay in the ?ow dynamics. The performance of the proposed control schemes has been evaluated using the ns-2 simulation environment. The research concludes that active control of hard real- time ?ows delivers the same or somewhat better QoS as High Bit Rate (HBR, no control), but with a lower average bit rate. Consequently, it helps reduce bandwidth use of controlled real-time ?ows by anywhere between 31:43% to 43:96%. Proposed reactive control schemes deliver good QoS. However, they do not scale up as well as the predictive control schemes. Proposed predictive control schemes are e?ective in delivering good quality QoS while using up less bandwidth than even the reactive con- trol schemes. They scale up well as more real-time multimedia ?ows start employing them.
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    Streaming Audio & Video Experience (SAVE): A Solution to Publish Music-related ETDs
    (2016-05-26) Yang, Le; Starcher, Christopher; Ketner, Kenny; Luker, Scott; Patterson, Matthew; Johnson, Daniel; Texas Tech University
    The current literature of electronic theses and dissertations (ETDs) has frequently discussed issues regarding ETD collaborations, discovery, metadata, system improvement, and long-term preservation strategies. However, rare literature discussed music-related ETDs; no found literature provided a solution to address the concerns of multimedia publishing in music-related ETDs. Main challenges associated with music ETDs are integration of a variety of music format and software, as well as the appropriate use of copyrighted materials of music. One of the common ways to publish music-related ETDs merely include multimedia supplements in ways of attaching original audio files, allowing free downloads of the copyrighted performing works. Realizing the current concerns and unresolved issues that are still existing in music-related ETDs, TTU Libraries has developed a system called Streaming Audio and Video Experience (SAVE) that includes an authenticated streaming multimedia player, a responsive-design user interface, and a web-based submission and management system. The TTU Libraries is using SAVE, integrated with DSpace-based Institutional Repository, to publish music-related electronic theses and dissertations (ETDs) for the College of Visual & Performing Arts. The integrated system – including both the technology solution SAVE and the publishing model – overcomes physical and technological limits while expanding access to music-related ETDs and other multimedia collections to patrons from any computer with an Internet connection. Through the SAVE system, distance education students have the same access to multimedia collections as local students do. Also, these multimedia collections can be made available for use in networked classroom and course management systems across campus. Professors are able to use these collections in their lessons without having to check out the physical copies from the library. By offering this online accessible system, physical multimedia files avoid substantial amount of future damage caused by heavy use and frequent check-outs. The development and implementation of SAVE system fill the blank in the current literature of the music-related ETDs and also ETDs in general, as well as offer a solution to resolve the essential conflicts between open access ETDs and copyrighted performing works. The TTU Library wants to propose it as a solution to handle other multimedia collections on the TTU campus and to release it as open source software for other institutions with similar needs. In addition, TTU Libraries plans to release the SAVE technology as open source software to benefit the universities that have similar needs.