Another Advantage of Digital Data
Digital data can have additional data added to it to allow for detection and correction of errors
- Scratch a CDROM - will still play fine
- Scratch, stretch an analog tape - throw it away
Digital data can be transmitted over a medium that introduces errors that are corrected at receiving end
- Satellite transmission of DirectTV - each ‘screen’ image is digitally encoded; errors corrected when it reaches your digital Set Top receiver, shows up as a ‘Perfect’ Picture.