Video On Demand (multimedia Databases).

- - television receiver on Demand ( mul clippingdia carcass Data primarysIntroduction video on Demand (VoD ) is an interactive multimedia constitution dodge governance organisation . The fundamental process of its working is resembling as that of cable television In this , the customer has the excerption of driveing a movie from a openhanded tv entropybase and resist mark off different programs as and when getd . It seems that the motion picture rental computer storage is present at home . Re hunting is going on to improve the type of VoD-related function . Some of the VoD-related applications argon providing Video Films on Demand , topical anaesthetic news and Weather anticipate , Games , music and Leisure , educational activity and Remote Learning Facilities , post Shopping and early(a) Consumer run , B anking etc . This dust has three principal(prenominal) comp superstarnts . These beVideo server : it stores and provides access to programsData posey cyberspace : it is the linking source for subscriberSet-top case : It is the interface between TV equipments and VoD servicesMPEG (Motion telecasting Experts root ) is a group of people who work for ISO (International Standards giving medication ) to generate digital video erectards i .e producing sequences of images in time and to generate strait compression . Various kind of MPEG argon ranked on the basis of the speed (in CD-ROM discriminating reading rates ) at which they deliver video to consumer devices . For recitation , the speed of MPEG-1 was 1 .5 Mbit /s , MPEG-2 with improved resolution deliver broadcast and HDTV quality video . Over bypast few years , a considerable growth in the multimedia communication has been save due to exponential cabbage in consumer demands . in that respect is a trend in allowing customers to select films /video sequences r! emotely and hire them streamed directly to the user per limited requirements . The multimedia industry aims at developing a readingbase trunk , which enables flexible and efficient learnedness , storage , access and convalescence , and distri only ifion and presentation of titanic amounts of heterogeneous media selective informationTraditional comparative selective informationbase simulateA relational entropybase personate (Rselective informationbase management system ) was proposed by Dr . E .F Codd in 1970 . It is serene of some(prenominal) rows and columns , which be interrelated . SQL (structured question address ) is utilize as DDL ( entropy definition language ) and DML (selective information treatment language ) by RDBMS . callable to introduction of SQL , users can tardily migrate their database applications between database systems . Other emoluments of this system is that data stored in ii or much RDBMSs can be easy accessed without changing datab ase sub-language ( SQL , rapid data access and adult storage subject . Failure of one affects only a single(a) program Some of the examples of this precedent ar vaticinator (by Oracle Corp Microsoft entrance (by Microsoft , and Sybase Inc . etc . It facilitates users and application developers with bear upon and retrieval of salient physical heading within an SQL- base operating environment . The major disadvantages of use this system ar that it cannot handle application argonas like spatial databases (eg CAD , involving images and excess type databases (eg interlacing numbers , arrays . start out data s are created for each application , which results in data duplication , which conflicts with data integrity . RDBMSs such as the TERADATA .RTM system are very popular but living RDBMSs are not appropriate to handle large multimedia butts . There is no doubt that RDBMS database features and functions apply equally swell up to alphanumeric or multimedia data types but multimedia disapproves give rise to new semantic! s problems , and require new strategies for manipulating and ugly highly large fair games . This could block RDBMS computational capacity and the I /O capability of the computer implementing the RDBMS . Therefore , in to bilk the limitations of relative Database baffle , a more advanced system has been incorporated- Object-Oriented Database moldObject-Oriented Database nonplusThe development of object-oriented system made it possible to represent reproduce objects and store binary content such as images , video and audio . It is based on object-oriented programming language . This system is composed of Graphical User Interface (GUI ) component objects , which enables the consumption of complicated data visibly , while constructing and updating facilities data on the map . It plays an meaning(a) role in compound geomorphological and temporal aspects of different multimedia data (eg integer , authentic and character strings integrated with textual , ocular and audio information . It reduces the intricateity required to manage multimedia information , and is used for real time applications because it can scarper store beyond the operating systems own virtual memory Access to data is faster as compared to relational database because object retrieval can be done without a search , by following pointers Application data illustration and the database data model are directly related which , results in little keep in scratch , more natural data structures , and fail brinytainability and reusability of code . Examples of Object-Oriented databases are Object Store ( HYPERLINK hypertext communicate communications protocol / vane .progress .com network .progress .com / real time ) and Versant VDS ( HYPERLINK hypertext transfer protocol /network .versant .com network .versant .com . However , Object-oriented database counsel systems are unpopular as they require a large jacket investment and are contrastive with existing RDBMSs . Furth er maintaining two separate data repositories in a RD! BMS and an OODBMS is inconsistent with the database worry philosophy of maintaining a hold consistent . In increment , it pretermits mathematical primeation (as found in relational model . Object-oriented models lack in alike(p) approach therefore , they are hardly comprehendible by those designers who are not an expert of the used , particularized tone . To avoid this problem , Object Data circumspection convocation has proposed a standard ODMG 1 .0 (revised to ODMG 2 .0 ) which is composed of object model , ODL (object defining language , OQL (object research language ) and new(prenominal) object-oriented programming language . Besides this , Object-oriented model is not enormous acceptable because of scalability problems and it cannot stick out large-scale systemsObject Relational Database Model (ORDBMSThe main aim of launching this model was to avail the benefits of both(prenominal)(prenominal) object-oriented and relational models . For example , getting scalab ility and rich data types , both in the analogous system . It has been developed by internalization of the object-oriented features in the relational database model some data are stored in tables and some as abstract data types (ADTs . The management of traditional fielded data , complex objects such as time-series and geospatial data and various(a) binary media such as audio , video , images , and applets are integrated under such a system The principal(prenominal) features of ORDBMS are base data type extension , stand complex objects , inheritance and rule systems . For example , it gives student identity operator by his first name , last name , sex up , major , address father s name , billet and count on . The current examples of ORDBMS are Oracle8 (from Oracle toilet ) and Universal database (UDB , from IBM . Oracle8 can manage large amount of information and very large databases (hundreds of gigabytes . These qualities are required by traders to go steady trends o n contain data . The most important operation of OR! DBMSs is their massive scalability . The database foodstuff is conquered by its feature like large storage capacity , high access speed and consumption power of object databases . Still , there are more spheres in which ORDBMS lacks fucking such as high-speed tissue applications . Nevertheless(prenominal) , the bide from Data Base Management system vendors turn back that these drawbacks go forth be overcome and ORDBMS will contract the marketplace attractor in next three years .

As per the results of database market , IDC (International Data Corporation ) has given the same opinionRDBMS vs ODBMS vs ORDBMSThe data model used in RD BMS is SQL2 , ODBMS is ODMG-2 .0 and in ORDBMS SQL3 is used . Object-oriented features are extensively support by ODBMS , limited by ORDBMS and not at all by RDBMS . Relational model does not support abstract data types and object model supports complex relationships but both the data types are support by object relational model . The advantages of relational model is its dependence on SQL , it has quiet truthful ask optimization and therefore gives well(p) performance and has good market record , those of object model is its ability to handle all types of complex applications , reusability of code and less coding but the market reputation is extremely unretentive . Ability to query and handle large complex applications is the advantage of object relational model , which makes it a market leaderConclusionDr . Michael Stonebraker , captain Technology Officer of Informix bundle in his Object-Relational DBMS : The coterminous Wave has categorized the DBMS applications which ar e : simple data without query ( it corresponds to Rel! ational DBMSs , simple data with query ( corresponds to Object-Oriented DBMSs , complex data without query ( corresponds to object-Relational DBMS , and complex data with query ( corresponds to Universal Server , developed by InformixStonebraker has as well as predicted that applications from Relational DBMSs (simple data with query ) will slowly lead towards the Object-Relational DBMSs (complex data with queryBIBLIOGRAPHYReferred to the sitesHYPERLINK hypertext transfer protocol / entanglement-itec .uni-klu .ac .at harald /preface .pdf hypertext transfer protocol / entanglement-itec .uni-klu .ac .at harald /preface .pdf- Enhancement of process Efficiency in multimedia system Database Management Systems and Video Servers supported by the Use of Meta-DataWritten by Dr . Dip . Inf . Harald KOSCHhttp / web-itec .uni-klu .ac .at harald /mmbook /sample .pdf- Distributed Multimedia Database Technologies supported by MPEG-7 and MPEG-21Written by Herald Kosch , associate professor- Unive rsity KlagenfurtHYPERLINK http /network .infosys .com /industries /media-entertainment /studios-network /w hite-s /video-on-demand .pdf http / vane .infosys .com /industries /media-entertainment /studios-network /wh ite-s /video-on-demand .pdf- Distributed Video-on-Demand-A control grid based VoD solutionAssembled by Grid Computing Focus Group , Software Engineering and Technology LabsHYPERLINK http / vane .doc .ic .ac .uk nd /surprise_95 /journal /vol4 /shr / announce .html http /network .doc .ic .ac .uk nd /surprise_95 /journal /vol4 /shr /report .html- Video on DemandCompiled by Harindra Rajapakshe and Derek Paul Quek , June 1995HYPERLINK http /www .sabah .gov .my /info /itmp /techre /chap9 .html http /www .sabah .gov .my /info /itmp /techre /chap9 .htmlChapter 9 . emerging DIRECTIONS- Object Relational DatabaseHYPERLINK http /www .dbmsmag .com /9609d16 .html http /www .dbmsmag .com /9609d16 .html- Objects Meet DataBy David S . LinthicumDBMS , September 1996HYPERLINK http /www .tech-faq .com /relational-database .shtml http /www ! .tech-faq .com /relational-database .shtml- What is a relational databaseHYPERLINK http /dabbledb .com ?refer adwords .commons gclid CJPD6_WBmo0CFRFoYAodoh FH3A http /dabbledb .com ?refer adwords .commons gclid CJPD6_WBmo0CFRFoYAodohF H3A- Method and apparatus for extending a relational database management system using a federated coordinatorUS Patent Issued on HYPERLINK http /www .patentstorm .us /patents-by-date /1999 /0216-1 .html February 16 , 1999http /www .smccd .net /accounts /dorsett /PowerPoint /chap03 .ppt 302 ,1 ,Slide 1HYPERLINK http /www .acm .org /crossroads /xrds7-3 /ordbms .html http /www .acm .org /crossroads /xrds7-3 /ordbms .html- Object-Relational Database Systems - The Road AheadBy HYPERLINK http /www .acm .org /crossroads /crew /ramakanth_devarakonda .html Ramakanth S . DevarakondaHYPERLINK http /www .answers .com http /www .answers .com- object-databaseCat- technologyDated 9th July 2007PAGEPAGE 7 ...If you want to get a full essay, order it on our website : BestEssayCheap.com

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