Video On Demand (multimedia Databases).

- - television receiver on Demand ( mul cartridge clipdia outline Data pratsIntroduction television set on Demand (VoD ) is an interactive multimedia organization outline governance administration . The fundamental process of its working is comparable as that of cable television In this , the customer has the picking of destineing a movie from a openhanded tv entropybase and patronage mark off different programs as and when getd . It seems that the impression letting computer storage is present at home . Re hunting is going on to improve the type of VoD-related service . Some of the VoD-related applications argon providing Video Films on Demand , local anaesthetic news and Weather anticipate , Games , music and Leisure , nurture and Remote Learning Facilities , post Shopping and another(prenominal) Consum er operate , Banking etc . This corpse has three principal(prenominal) comp binglents . These argonVideo server : it stores and provides access to programsData throw in the towely profit : it is the linking source for subscriberSet-top case : It is the interface between TV equipments and VoD servicesMPEG (Motion skeleton Experts root ) is a group of people who work for ISO (International Standards formation ) to generate digital video goards i .e producing sequences of images in time and to generate sound recording compression . Various kind of MPEG ar ranked on the basis of the speed (in CD-ROM discriminating breeding rates ) at which they deliver video to consumer devices . For prototype , the speed of MPEG-1 was 1 .5 Mbit /s , MPEG-2 with improved resolution deliver broadcast and HDTV quality video . Over erstwhile(prenominal) few old age , a considerable growth in the multimedia communication has been save due to exponential climb on in consumer demands . at that place is a trend in allowing customers! to select films /video sequences remotely and hire them streamed directly to the user per particular proposition requirements . The multimedia industry aims at developing a informationbase system , which enables flexible and efficient learnedness , storage , access and recuperation , and distri only ifion and presentation of titanic amounts of heterogeneous media selective informationTraditional relational entropybase simulateA relational infobase personate (R informationbase management system ) was proposed by Dr . E .F Codd in 1970 . It is serene of some(prenominal) rows and columns , which atomic number 18 interrelated . SQL (structured question dustup ) is utilize as DDL (data definition language ) and DML (data treatment language ) by RDBMS . ascribable to introduction of SQL , users can tardily migrate their database applications between database systems . Other emoluments of this system is that data stored in deuce or to a greater extent 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 pretence atomic number 18 vaticinator (by Oracle Corp Microsoft recover (by Microsoft , and Sybase Inc . etc . It facilitates users and application developers with bear upon and recovery of enceinte physical heading within an SQL- base operating environment . The major disadvantages of use this system atomic number 18 that it cannot handle application areas like spatial databases (eg CAD , involving images and supererogatory 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 functio ns apply equally swell up to alphanumeric or multime! dia data types but multimedia disapproves give rise to new semantics problems , and require new strategies for manipulating and silly extremely large objectives . This could block RDBMS computational capacity and the I /O capability of the computer implementing the RDBMS . Therefore , in to have words the limitations of relative Database mold , a more advanced system has been incorporated- Object-Oriented Database pretendingObject-Oriented Database simulationThe development of object-oriented system made it possible to represent conglomerate 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 expenditure 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 inte ger , genuinely and character strings integrated with textual , ocular and audio information . It reduces the labyrinthineity required to manage multimedia information , and is used for real time applications because it can scarper storage 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 pose and the database data model are directly related which , results in little spell out in principle , more natural data structures , and come apart brinytainability and reusability of code . Examples of Object-Oriented databases are Object Store ( HYPERLINK hypertext re conk 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 chief city investment and are contrastive wit! h existing RDBMSs . Further maintaining two separate data repositories in a RDBMS and an OODBMS is inconsistent with the database attention philosophy of maintaining a hold consistent . In rundown , it overleaps mathematical primeation (as found in relational model . Object-oriented models lack in alike(p) approach therefore , they are hardly understandable by those designers who are not an expert of the used , ad hoc tone . To avoid this problem , Object Data focussing meeting 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 full 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 twain object-oriented and relational mod els . For example , getting scalability and rich data types , twain in the akin 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 forethought 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 classical features of ORDBMS are base data type extension , stand complex objects , inheritance and rule systems . For example , it gives student personal identity by his first name , last name , elevate up , major , address father s name , reparation and count on . The current examples of ORDBMS are Oracle8 (from Oracle deal ) 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 trad ers to hear trends on contain data . The most impor! tant feat of ORDBMSs is their massive scalability . The database foodstuff is conquered by its feature like large storage capacity , high access speed and enjoyment power of object databases . Still , there are many spheres in which ORDBMS lacks fucking such as high-speed mesh applications . Nevertheless(prenominal) , the bide from Data Base Management system vendors check over that these drawbacks go forth be overcome and ORDBMS will plump the food market attractor in next three years .

As per the results of database market , IDC (International Data Corporation ) has given the same opinionRDBMS vs ODBMS v s 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 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 dim-witted interrogation optimisation 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 : sim! ple data without query ( it corresponds to Relational 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 besides predicted that applications from Relational DBMSs (simple data with query ) will slowly move 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 b y Herald Kosch , associate professor- University KlagenfurtHYPERLINK http / vane .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 power grid based VoD solutionAssembled by Grid Computing Focus Group , Software Engineering and Technology LabsHYPERLINK http /network .doc .ic .ac .uk nd /surprise_95 / diary /vol4 /shr / announce .html http / web .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 /r! elational-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 instrument 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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