Mindmap
OCR Computing
Mind map: OCR Computing Data Models and DBMS
Inhalt der Mindmap
OCR Computing
Sound
- Described by metadata
- The data stored includes audio codec and sample rate
- Analogue- continuously varying
- Sample interval - to describe sample rate and time between samples being taken
- Sound is sampled at a low rate:
- Very few samples are taken
- Poor match between original and sample
- Small file size is required
- Sound is sampled at a low rate:
Data models
- Flat file database
- Simplest model
- Each row is called a record
- Column is called field
- Hierarchical database
- Useful when making an inventory
- Relational Database
- Most useful model
- Most common type of database
- Store data is separate tables
- Each table is linked by a relationship
- Each table contains data about an entity
- Flat file database
DBMS
- Create database applications
- Protect data
- Run queries to extract data
- Keep data consistent
- Keep data accurate
- Database management system
- Looks after a database