1. BIT 3193 MULTIMEDIA DATABASE CHAPTER 5 : MULTIMEDIA DATABASE MANAGEMENT SYSTEM ARCHITECTURE

3. Figure 5.1 shows the architecture of MMDBMS. This architecture comprises of various components of the MMDBMS. The architecture shows multimedia database server and client connected by a computer network.

4. Figure 5 : Distributed MMDBMS Architecture

5. There are SIX sub-components in MMDBMS server: a)Storage Manager b) Metadata Manager c) Index Manager d) Data Manager e) Query Processor f) Communication Manager

6. Storage Manager handles the storage and retrieval of different media objects composing a database. has been described in Chapter 2 the metadata as well as the index information related to media objects are also handled by this module.

7. Index Manager supports formulation and maintenance of faster access structures for multimedia information

8. Metadata Manager deals with creating and updating metadata associated with multimedia objects. provides relevant information to the query processor in order to process a query.

9. Data Manager helps in: creation and modification of multimedia objects. handling temporal and spatial characteristics of media objects metadata manager, index manager, and object manager access the required information through the storage manner

10. Query Processor receives and processes user queries. utilize information provided by metadata manager, index manager, and data manager for processing a query

11. Query Processor when user query for the objects: the query processor identifies the sequence of the media objects to be presented the sequence along with the temporal information for object presentation is passed back to the user

12. Communication Manager handles the interface to the computer network for server-client interaction this module : depending on the services offered by the network service provider reserves the necessary bandwidth for server-client communication transfer queries and response between the server and the client

13. There are FOUR sub-components in MMDBMS client: a) Communication Manager b) Retrieval Schedule Generator c) Response Handler d) Interactive Query Formulator

14. Communication Manager manages the communication requirements of a multimedia database client its functionalities are the same as that of the server communication manager.

15. Retrieval Schedule Generator determines the schedule for retrieval media objects for the retrieval schedule generator: the response handler provides information regarding the objects composing the response and the associated temporal information

16. Retrieval Schedule Generator the retrieval schedule generator: based on the available buffer and network throughput, determines the schedule for object retrieval the retrieval schedule is used by the communication manager to download media objects in the specified sequence

17. Response Handler interacts with the client communication manager in order to identify the type of response generated by the server if the response comprises of the information regarding the objects to be presented: it interacts with the client communication manager in order to identify the type of response generated by the server

18. Response Handler if the response comprises of the information regarding the objects to be presented: then the information is passed to the retrieval schedule generator for determining the retrieval sequence

19. Response Handler if the response comprises of the information regarding modifying the posed query or a null answer: the response is passed to the user

20. Interactive Query Formulator helps a user to frame an appropriate query to be communicated to a database server takes the response from the server through the response handler module in order to reformulate the query