Download Distributed Multimedia Database Technologies Supported by by Harald Kosch PDF

By Harald Kosch

A multimedia method wishes a mechanism to speak with its setting, the web, consumers, and functions. MPEG-7 presents a typical metadata layout for worldwide communique, yet lacks the framework to allow a number of the avid gamers in a procedure engage. MPEG-21 closes this hole through setting up an infrastructure for a disbursed multimedia framework, taking into consideration the construction, amendment, viewing, and verbal exchange of electronic goods between all individuals inside an MPEG-21 contract. Now you might have a advisor that examines the constitution and power utilization of those rising criteria. disbursed Multimedia Database applied sciences Supported via MPEG-7 and MPEG-21 describesthe applied sciences, recommendations, and instruments of disbursed, content-based multimedia structures. It makes a speciality of the sensible makes use of of the applied sciences of MPEG and SQL/MM in those elements, and at the interoperability between them (for information alternate, transactions, interplay, etc.). This ebook demonstrates an open disbursed multimedia framework that permits those elements to cooperate in a operating setting, offering wealthy multimedia entry in an more and more cellular international. concerning the writer Harald Kosch is an affiliate professor on the collage of Klagenfurt. His domain names of curiosity are allotted multimedia platforms, multimedia databases, middleware, and web purposes. He begun learn on the ?cole Normale Sup?rieure in 1993 in the course of postgraduate learn and entered the Ph.D. application in 1994, acquiring his Ph.D. measure in June 1997. He actively participates within the relocating photograph specialists crew (MPEG)-7 and MPEG-21 standardization and is occupied with a number of foreign learn initiatives within the area of disbursed multimedia platforms.

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Extra info for Distributed Multimedia Database Technologies Supported by MPEG-7 and MPEG-21

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AAC supports a wider range of sampling rates (from 8 to 96 kHz) and up to 48 audio channels and is, thus, more powerful than MP3. Three profiles of AAC provide varying levels of complexity and scalability MPEG-4 AAC is, therefore, designed as high-quality general audio codec for 3G (third-generation) wireless terminals. However, compared with MP3, AAC software is much more expensive to license, because the companies that hold related patents decided to keep a tighter rein on it. The last component proposed is the Delivery Multimedia Integration Framework (DIMF).

The idea of motion compensation is to encode a video frame based on other video frames temporally close to it. In addition to the fact that MPEG video compression works well in a wide variety of applications, a large part of its popularity is that it is defined in three finalized international standards: MPEG-1, MPEG-2, and MPEG-4. MPEG-121 is the first standard (issued in 1993) by MPEG and is intended for medium-quality and medium-bit rate video and audio compression. 5 megabits per second, for this is a reasonable transfer rate for a double-speed CD-ROM player.

Page 12 Unlike MPEG-1, MPEG-2 supports interlaced television systems and vertical blanking interval signals. It is used in digital video disc videos. The concept of I-, P-, and B-pictures is retained in MPEG-2 to achieve efficient motion prediction and to assist random access. In addition to MPEG-1, new motion-compensated field prediction modes were used to efficiently encode field pictures. The top fields and bottom fields are coded separately. Each bottom field is coded using motion-compensated interfield prediction based on the previously coded top field.

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