Data Portability
Image
JPEG= Joint Photographic Express Group
TIFF= Tagge Image File Format
PNG=Portable Network Graphic
PICT= Picture
GIF= Graphic Interchange Format
Compressed image file, lossy compression, highly portable between systems
Stores bitmap images, compressed image, highly portable, used in OCR scanning
Can contain transparent background, lossless compression unless background is removed, highly portable
From the apple Macintosh, can store both bitmaps and vector images.
Supports bitmmapped image file format, can be animated
Text
TXT
CSV= Comma Sepereated Variables
RTF
Text/plain text file, only holds letters and numbers, no formatting, no images, no compression, highly portable
Text file with each piece of information being separated by a comma,
Can transfer data between programs like databases and spreadsheets
Rich Text Format, Easily read by most word processing programs, supports limited range of images, highly portable
Portable Document Format, very portable,
Read only, objects set in a fixed position, no editing or moving its contents
Audio
Mp3
Moving picture experts group 3, compressed audio file, is standard, high quality fir small file size, very portable
MIDI
Musical Instrument Digital Interface, music files produced when digital musical instruments are connected as input devices to computers,
Allows sound samples to be recorded digitally corrected and digitally changed so another instrument can play the same notes
WAV
Windows Audio Waveform, standard for storing an audio bit stream on PC, highly portable
WMA
Windows Media Audio, compressed file format, designed for portability within Windows porgrams
MP4
Moving Picture Experts 4, Stores compressed video and audio, highly portable
AVI
Audio Video Interface, Stores video and audio, multimedia file format
Data compression
Making a file take up less memory space while still retaining information
Lossy compression
Removes file data such as reducing the number of colours used in an image , small reduction in an image, JPEG is an example of lossy compression
Lossless compression
Maintains the quality of file, no data lost , reduces the file size for sending over the internet, decompressed on on far side without any loss of quality