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Data and Information

Data and Information. Difference between Data and Information. What is Data? Age, Height, Weight, Score, … What is Information? The average mark of ICT in F.4 The average height of students in 4A… Can you guess what is the difference between data and information? (P.9). Types of Data.

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Data and Information

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  1. Data and Information

  2. Difference between Data and Information • What is Data? • Age, Height, Weight, Score, … • What is Information? • The average mark of ICT in F.4 • The average height of students in 4A… • Can you guess what is the difference between data and information? (P.9)

  3. Types of Data • Text • Images • Audio • Video

  4. Text • Character coding systems • American Standard Code for Information Interchange (ASCII) • Unicode • Big5 code

  5. Image • Bitmap • Image is represented by color dots (pixels) • Vector Graphics • Vector graphics are composed of a number of objects • Vector objects are defined by mathematical formulae

  6. Audio and Video • Audio • WAV • AAC • MP3 • Video • AVI • MPEG • MPV

  7. Components of Information System • Purposes • Data • Processes • Technologies • Personnel

  8. Information Processes • Data collection • Organization • Storage • Processing • Analysis • Transmission • Presentation

  9. Information Process (Data Collection) • It is the activity of collecting raw data from outside world. • Personal interviews • Telephone interviews • Questionnaires • Experiments • Surveys…

  10. Information Processing (Organization) • After the data has been collected, it must be organized into certain formats for further processed. • Manual validity checking • Data categorization • etc

  11. Information Processing (Storage) • Store the data for processing later • Non-digital storage • Paper • Files • Digital storage • CD-ROMs • DVDs • Hard disks, floppy disks, magnetic tapes …

  12. Information Processing (Processing) • Data processing • Sorting • Searching • Merging • Calculating • Word processing (MS Word, Open Office…) • Image processing • Video processing and audio processing

  13. Information Processing (Analysis) • Extract useful information • Graphs • Charts • …

  14. Information Processing (Transmission) • Sending information from one computer to another. • Protocol • TCP/IP • FTP • SMTP, POP3

  15. Information Processing (Presentation) • Present information • Lists, tables and charts • Can be presented through different media • Audio • Video • Screen displayed • Printed outputs

  16. HW (HWB)

  17. Format of homework

  18. HWA

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