Search (7 results, page 1 of 1)

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Abstract

Improvements in network bandwidth along with dramatic drops in digital storage and processing costs have resulted in the explosive growth of multimedia (combinations of text, image, audio, and video) resources on the Internet and in digital repositories. A suite of computer technologies delivering speech, image, and natural language understanding can automatically derive descriptive metadata for such resources. Difficulties for end users ensue, however, with the tremendous volume and varying quality of automated metadata for multimedia information systems. This lecture surveys automatic metadata creation methods for dealing with multimedia information resources, using broadcast news, documentaries, and oral histories as examples. Strategies for improving the utility of such metadata are discussed, including computationally intensive approaches, leveraging multimodal redundancy, folding in context, and leaving precision-recall tradeoffs under user control. Interfaces building from automatically generated metadata are presented, illustrating the use of video surrogates in multimedia information systems. Traditional information retrieval evaluation is discussed through the annual National Institute of Standards and Technology TRECVID forum, with experiments on exploratory search extending the discussion beyond fact-finding to broader, longer term search activities of learning, analysis, synthesis, and discovery.

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Abstract

Das vorliegende Buch handelt von den Technologien zum Austausch medialer Inhalte. Die Inhalte werden seit geraumer Zeit vornehmlich in digitaler Form dargestellt, was mit vielen Vorteilen für die Produzenten und Konsumenten verbunden ist. Positive Aspekte erstrecken sich sowohl auf die mögliche Qualität als auch auf die Handhabung und den erleichterten Umgang. Seit Beginn des 21. Jahrhunderts gibt es nun einen neuen Entwicklungsschritt, der als zweite Phase der Digitalisierung bezeichnet werden kann. Diese ist dadurch gekennzeichnet, dass die medialen Inhalte, oft auch als Content bezeichnet, in sehr vielen Fällen in datenreduzierter Form digital gespeichert und verteilt werden. Auch die Akquisition bezieht vermehrt Datenreduktion mit ein. Der Datenreduktion und den Datenformaten (File-Formate), unter denen die Inhalte ausgetauscht werden, kommen in dieser Phase eine zentrale Bedeutung zu. Damit die einzelnen Kommunikationspartner einander auch in dieser neuen Ära verstehen können, d. h. die Kommunikation ohne großen Aufwand, respektive ohne merklichen Qualitätsverlust stattfinden kann, ist eine Standardisierung sowohl der Datenreduktionsalgorithmen als auch der File-Formate erforderlich, und genau dies ist Gegenstand dieses Buches.

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LCSH

Library science / Technological innovations

Subject

Library science / Technological innovations

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Footnote

Rez. in: Annals of Library and Information Studies 62(2015) no.4, S.299-300 (A.K. Das)

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Classification

006.7 22

Date

7. 3.2007 19:30:22

DDC

006.7 22

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Date

12. 8.2012 18:05:22