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Technical Review | April-June 2012
– programme contents, Programme information, Casting information of the entire programme, production & promotion materials, graphics & setting & costume design artworks and Intellectual Property information. Appendix A is a list of the 34 data fields being used.
Most of the metadata required for this level are obtainable from other systems, however, there are still large portion of data fields need to be input manually.
2. Episode level Episode level metadata comprises 32 data fields dedicated for this episode, which are summarized into five categories – basic content, basic information, casting information, promotion and production materials and intellectual property information.
Most of the metadata required for this level are obtainable from other systems; however, there are still data fields need operation effort to input.
3. Item level Each episode may contain items and each item may contain many scenes. Item level metadata is the information of the scenes. There are six data fields for item level metadata – Part number (data belongs to which part of programme), item number of each scenes collection, type of collection, title or name of the collection, timelines of the collections.
4. Scene level Scene level metadata is a collection of information regarding each scene, merchandise licensing, musical materials, thematic highlights, programme licensing, notes for particular scenes and roller credit information.
Scene level metadata is the only metadata collection that has time information indicating the start time and end time of each scene associated.
Metadata System The infrastructure of TVB Metadata System comprises 7
component modules, namely, Domain Controllers, Application Servers, Database Servers, NAS Servers, Data Archiving Servers, Metadata Input Terminals and Subtitle Preparation Terminals. Following is a block diagram of TVB Metadata System for digitised contents.
Following is a brief description of functions of each module:
1. Domain Controllers To control the authentication and right of each users, as well as the logical disks they can access.
2. Application Servers Application Servers are basically web servers that serve as gateway to outside systems and are being used to handle requests for content retrieval from NAS. It is being enhanced to serve another in-house developed system – Basic Metadata Search Engine (BMSE).
3. Database Servers Metadata created are stored in Database Servers and will be archived onto LTO twice a day.
4. NAS Servers The MPEG-4 2.5Mbps video files produced by Digital Archive system are stored in NAS Servers for metadata input operation. The NAS Servers has 6 months storage capacity for MPEG-4 2.5Mbps and will be expanded when needed.
5. Data Archiving Servers Old MPEG-4 2.5Mbps video files are archived onto LTO tape when 80% of NAS storage capacity is reached.
6. Metadata Input Terminals There are more than 90 terminals for metadata input. These are consumer grade PCs with Window XP OS. Each terminal is equipped with a Jog & Shuttle Multimedia Control Device to control file play back modes such as Play, FF, RWD, and Pause/Still. In additional to the TVB in-house developed Metadata Input System (MIS), Quick Time Player, Microsoft Office Viewer and HKSCS 2001 Support Package are also installed on these computers.
Block Diagram – TVB Metada System
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