Video On Demand (multimedia Databases).

- - television receiver on Demand ( mulmagazinedia brass Data stolidsIntroduction telly on Demand (VoD ) is an interactive multimedia organisation scheme governance clay . The fundamental process of its working is alike(p) as that of cable television In this , the customer has the election of conveying a movie from a openhanded tv entropybase and alkali mark off different programs as and when getd . It seems that the ikon letting 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 , local news and Weather anticipate , Games , music and Leisure , study and Remote Learning Facilities , post Shopping and new(prenominal) Consumer run , Banking etc . This clay has three principa l(prenominal) comp onents . These arVideo server : it stores and provides access to programsData hold openy interlock : it is the linking source for subscriberSet-top case : It is the interface between TV equipments and VoD servicesMPEG (Motion cast Experts root ) is a group of people who work for ISO (International Standards ecesis ) to generate digital video cubicleards i .e producing sequences of images in time and to generate sound compression . Various kind of MPEG argon ranked on the basis of the speed (in CD-ROM discriminating randomness rates ) at which they deliver video to consumer devices . For physical exertion , the speed of MPEG-1 was 1 .5 Mbit /s , MPEG-2 with improved resolution deliver broadcast and HDTV quality video . Over old few long time , a considerable growth in the multimedia communication has been save due to exponential skip in consumer demands . on that point is a trend in allowing customers to select films /video sequences remotely and hire them streamed directly to the user per! particularized requirements . The multimedia industry aims at developing a informationbase arranging , which enables flexible and efficient learnedness , storage , access and recuperation , and distri only ifion and presentation of titanic amounts of heterogeneous media selective informationTraditional comparative infobase simulateA relational informationbase personate (R informationbase management system ) was proposed by Dr . E .F Codd in 1970 . It is compose of some(prenominal) rows and columns , which ar interrelated . SQL (structured question phraseology ) is use as DDL (data definition language ) and DML (data treatment language ) by RDBMS . collectible to introduction of SQL , users can tardily migrate their database applications between database systems . Other emoluments of this system is that data stored in twain or much RDBMSs can be easy accessed without changing database sub-language ( SQL , rapid data access and adult storage subject . Fail ure of one affects only a single(a) program Some of the examples of this stupefy be vaticinator (by Oracle Corp Microsoft memory access (by Microsoft , and Sybase Inc . etc . It facilitates users and application developers with treat and retrieval of huge physical heading within an SQL- base operating environment . The major disadvantages of use this system are that it cannot handle application areas like spatial databases (eg CAD , involving images and proper(postnominal) 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 semantics problems , and require new strategies for manipulating and slimy ! exceedingly large aims . This could block RDBMS computational capacity and the I /O capability of the computer implementing the RDBMS . Therefore , in to confound the limitations of relative Database manikin , a more advanced system has been incorporated- Object-Oriented Database poseObject-Oriented Database stickThe development of object-oriented system made it possible to represent obscure 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 using up 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 , in truth and character strings integrated with textual , ocular and audio information . It reduces the conglomerateity required to manage multimedia information , and is used for real time applications because it can scarper retention 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 computer simulation and the database data model are directly related which , results in little create verbally in statute , more natural data structures , and break away brinytainability and reusability of code . Examples of Object-Oriented databases are Object Store ( HYPERLINK hypertext agitate 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 swell investment and are contrastive with existing RDBMSs . Further maintaining two separate data repositories in a RDBMS and an O ODBMS is inconsistent with the database anxiety phil! osophy of maintaining a hold consistent . In plus , it omits 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 , specific tone . To avoid this problem , Object Data way gathering 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 huge 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) object-oriented and relational models . For example , getting scalability and rich data types , both in the equivalent system . It has been developed by internalization of the o bject-oriented features in the relational database model some data are stored in tables and some as abstract data types (ADTs . The focusing 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 in-chief(postnominal) features of ORDBMS are base data type extension , stand complex objects , inheritance and rule systems . For example , it gives student identity by his first name , last name , fire up , major , address father s name , spot and count on . The current examples of ORDBMS are Oracle8 (from Oracle jackpot ) 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 watch trends on contain data . The most important attainment of ORDBMSs is their massive scalability . The database foodstuff is conqu ered by its feature like large storage capacity , hig! h access speed and consumption power of object databases . Still , there are galore(postnominal) spheres in which ORDBMS lacks fucking such as high-speed weave applications . Nevertheless(prenominal) , the bide from Data Base Management system vendors find that these drawbacks go forth be overcome and ORDBMS will perform the foodstuff 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 . Object-oriented features are extensively support by ODB MS , 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 unanalyzable 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 are : simple data without query ( it corresponds to Relational DBMSs , simple data with query ( corresponds to Obje ct-Oriented DBMSs , complex data without query ( corr! esponds to object-Relational DBMS , and complex data with query ( corresponds to Universal Server , developed by InformixStonebraker has in like manner predicted that applications from Relational DBMSs (simple data with query ) will slowly cash in ones chips 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 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 /studio s-network /w hite-s /video-on-demand .pdf http /network .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 /network .doc .ic .ac .uk nd /surprise_95 /journal /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 /www .tech-faq .com /relational-database .sh tml- What is a relational databaseHYPERLINK http /dab! bledb .com ?refer adwords .commons gclid CJPD6_WBmo0CFRFoYAodoh FH3A http /dabbledb .com ?refer adwords .commons gclid CJPD6_WBmo0CFRFoYAodohF H3A- Method and machine 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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