Multimedia industries

Multimedia industries

1. File storage

   • Word document = .doc / .docs
   • database = .mdb
   • speadsheet = xls / .xlsx
   • presentation = .ppt
   • text file = .txt
   • bitmap graphic = .bmp
   • compressed bitmap graphic = .jpg
   • web page = .htm / .html
   • application = .exe

2. Data compression

   • Advantages
     • making files smaller
     • less storage space used + easier to transmit over a network
   • Text files
     • switching letters with characters
       • characters take up less space so it compresses the file size
   • Graphics files
     • can be easily compressed by a large amount as a JPEG or GIF
   • Video files
     • compare frames and send the data about the changes between them MPEG
   • Sound files
     • common compression = MP3
       • higher bit rate = higher quality but larger files
     • Compressed but do not lose quality
   • ZIP files
     • groups of files can be compressed into one zip file (.zip)

3. Web software

   • issues with hosting websites
     • security of the website
       • Vulnerable to hacking
         • firewalls can be used
     • speed of response / upload speed must be good
       • regular updates and reliable info is needed
     • Avoid copyrighting or being offensive
   • Internet browsers
     • http = normal websites
       • https = secure websites
         • ftp =transferring files
           • file = files on your computer