ultimedia collections including manipulation of content, home video editing, searching a game, karaoke) Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright © 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website. Protocols Protocols Investigation services (e.g., human characteristics recognition, forensics) Journalism (e.g., searching speeches of a certain politician using his or her name, voice, or face) Multimedia directory services (e.g., yellow pages, tourist information, geographical information systems) Multimedia editing (e.g., personalized electronic news service, media authoring) Remote sensing (e.g., cartography, ecology, natural resources management) Shopping (e.g., searching for clothes) Social (e.g., dating services) Surveillance (e.g., traffic control, surface transportation, nondestructive testing in hostile environments) The standard also lists the following examples of how the capabilities of MPEG-7 might be used: A musician plays a few notes on a keyboard and retrieves a list of musical pieces similar to the required tune or images that match the notes in a certain way, as described by the artist. An artist draws a few lines on a screen and finds a set of images containing similar graphics, logos, ideograms. A clothing designer selects objects, including color patches or textures, and retrieves examples from which he or she selects the interesting objects with which to compose a design. Using an excerpt of Pavarotti's voice, an opera fan retrieves a list of Pavarotti's records and video clips in which Pavarotti sings a particular piece, as well as photographs of Pavarotti. This is a remarkable (and remarkably complex!) standard that holds enormous promise. The previous section focused on the layer six function known as com- pression. Encryption, on the other hand, is used when the information contained in a file is deemed sensitive enough to require that it be hid- den from all but t