Data Flashcards
What is pixel
A digital image is composed of many small points of colour
Explain why using a JPG effects an image
It is a Lossy compression
It’s will reduce file size by deleting some data
What does ascii stand for
American standard code information interface
What is ASCII
Character set that define list of characters recognised by a computers hardware and software
How limiting ASCII
It has a limitation of 128 bits
How many possible characters goes ASCII have
128 possible characters
What is a much better version of ASCII
Unicode
Why is ASCII an disadvantage to the computing world
Can only be used by people who understand English
What does expanded ASCII give up
It gives us 256 bits of data for 8 bits
What do you need to work out the size file of an image
resolution,colour depth and image size
What effect the size of file
Sampling rate and bit depth
How do you work out the file size
File size = sample frequency x bit depth x recording length (seconds)
