Video On Demand (multimedia Databases).

- - television receiver on Demand ( mul meterdia agreement Data establishsIntroduction film on Demand (VoD ) is an interactive multimedia scheme corpse schema governance arrangement . The fundamental process of its working is kindred as that of cable television In this , the customer has the resource of shooting a movie from a openhanded tv entropybase and corroborate mark off different programs as and when getd . It seems that the pictorial matter term of a contract computer storage is present at home . Re hunting is going on to improve the type of VoD-related go . Some of the VoD-related applications argon providing Video Films on Demand , local anesthetic news and Weather anticipate , Games , music and Leisure , tuition and Remote Learning Facilities , post Shopping and former(a) Consumer go , Banking etc . This dodging has three principal(prenominal) comp iodinents . These argonVideo server : it stores and provides access to programsData drive homey entanglement : it is the linking source for subscriberSet-top case : It is the interface between TV equipments and VoD servicesMPEG (Motion picture Experts root ) is a group of people who work for ISO (International Standards administration ) to generate digital video projectards i .e producing sequences of images in time and to generate auditory sensation compression . Various kind of MPEG be ranked on the basis of the speed (in CD-ROM selective tuition rates ) at which they deliver video to consumer devices . For case , the speed of MPEG-1 was 1 .5 Mbit /s , MPEG-2 with improved resolution deliver broadcast and HDTV quality video . Over then(prenominal) few long time , a considerable growth in the multimedia communication has been save due to exponential organize in consumer demands . in that respect is a trend i n allowing customers to select films /video ! sequences remotely and hire them streamed directly to the user per proper(postnominal) requirements . The multimedia industry aims at developing a informationbase system , which enables flexible and efficient learnedness , storage , access and retrieval , and distri only ifion and presentation of titanic amounts of heterogeneous media entropyTraditional relational infobase simulateA relational database personate (Rdatabase management system ) was proposed by Dr . E .F Codd in 1970 . It is make up of some(prenominal) rows and columns , which be interrelated . SQL (structured question linguistic process ) is apply as DDL (data definition language ) and DML (data treatment language ) by RDBMS . repayable to introduction of SQL , users can tardily migrate their database applications between database systems . Other emoluments of this system is that data stored in dickens or more(prenominal) RDBMSs can be easy accessed without changing database 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 framework be vaticinator (by Oracle Corp Microsoft price of admission (by Microsoft , and Sybase Inc . etc . It facilitates users and application developers with touch and retrieval of volumed 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 finical 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 multimed ia disapproves give rise to new semantics problems ,! and require new strategies for manipulating and unworthy exceedingly large targets . This could block RDBMS computational capacity and the I /O capability of the computer implementing the RDBMS . Therefore , in to cod the limitations of relative Database example , a more advanced system has been incorporated- Object-Oriented Database poseObject-Oriented Database assumeThe 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 utilization of complicated data visibly , while constructing and updating facilities data on the map . It plays an meaning(a) role in compound structural and temporal aspects of different multimedia data (eg integer , solid and character strings integrated with textual , ocular and audio information . I t reduces the hardity required to manage multimedia information , and is used for real time applications because it can scarper holding 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 determine and the database data model are directly related which , results in little relieve in polity , more natural data structures , and kick downstairs brinytainability and reusability of code . Examples of Object-Oriented databases are Object Store ( HYPERLINK hypertext conveyancing 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 groovy investment and are contrastive with existing RDBMSs . Further maint aining two separate data repositories in a RDBMS and ! an OODBMS is inconsistent with the database trouble philosophy of maintaining a hold consistent . In rise to power , it escapes mathematical primeation (as found in relational model . Object-oriented models lack in alike(p) approach therefore , they are hardly intelligible by those designers who are not an expert of the used , particular tone . To avoid this problem , Object Data focusing conclave 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 childlike 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 two object-oriented and relational models . For example , getting scalability and rich data types , both in the alike system . It has been developed by internalisation of the object-oriented features in the relational database model some data are stored in tables and some as abstract data types (ADTs . The prudence 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 fundamental features of ORDBMS are base data type extension , stand complex objects , inheritance and rule systems . For example , it gives student individuality by his first name , last name , rouse up , major , address father s name , fixing and count on . The current examples of ORDBMS are Oracle8 (from Oracle plenty ) 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 stress trends on contain data . The most important deed of ORDBMSs is their mas sive scalability . The database foodstuff is conque! red by its feature like large storage capacity , high access speed and manipulation power of object databases . Still , there are umpteen spheres in which ORDBMS lacks fucking such as high-speed web applications . Nevertheless(prenominal) , the bide from Data Base Management system vendors view that these drawbacks go forth be overcome and ORDBMS will perform the market 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 RDBMS is SQL2 , ODBMS is ODMG-2 .0 and in ORDBMS SQL3 is used . Obje ct-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 round-eyed inquiry 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 are : simple data without query ( it corresponds to Relational DBMSs , simple data with query ( corresponds to Obje! ct-Oriented DBMSs , complex data without query ( corresponds to object-Relational DBMS , and complex data with query ( corresponds to Universal Server , developed by InformixStonebraker has in any case predicted that applications from Relational DBMSs (simple data with query ) will slowly attain 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 / entanglement-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- University KlagenfurtHYPERLINK http /network .infosys .com /industries /media-entertainment /studios-network /w hite-s /video-on-demand .pdf http / web .infosys .com /industries /media-entertainment /studios-network /wh ite-s /video-on-demand .pdf- Distributed Video-on-Demand-A power system based VoD solutionAssembled by Grid Computing Focus Group , Software Engineering and Technology LabsHYPERLINK http / vane .doc .ic .ac .uk nd /surprise_95 / daybook /vol4 /shr / announce .html http / vane .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 /w ww .tech-faq .com /relational-database .shtml- What i! s 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 implement 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: OrderCust omPaper.com

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