Images and Sounds 0.0 / 5 ? ComputingHardwareGCSEAQA Created by: Mr_MackintoastCreated on: 01-04-17 13:23 How do you work out what numbers are possible? 2^(number of bits) so the range is 0 to (ANS-1) 1 of 7 What is metadata? Metadata is the informarion about an image stored before it so the computer can recreate the image 2 of 7 What must the metadata contain? The metadata must contain the height and width in pixels and the colour depth 3 of 7 What is the colour depth? The colour depth is the number of bits used for each pixel/dot 4 of 7 What is the resolution? The resolution is the number of pixels/dots per unit. 5 of 7 Why is the file always slightly bigger than the image? The file is always slightly bigger because of the metadata stored at the start 6 of 7 How is sound turned into data? Sound is often continously varying data (analogue) but the computer needs them in digital form as set of binary numbers. 7 of 7
Comments
No comments have yet been made