Computer Science GCSE - Paper 2
Save Groups
Explain how sampling is - Height is measured and converted to binary
used to store audio - Sample taken at a regular interval (44,000 times per
recordings second)
Define what is meant by Number of samples taken per second
the term sampling
frequency
What are the effects of - The file size of the digital recording will be larger
increasing the sampling - The quality of playback of the digital recording will
frequency? be better
Describe how bitmap - Images are made of pixels
images are represented in - Each pixel is given a binary code which represents
binary the colour of that pixel
Explain why computers Computers consist of transistors which only have two
represent data in binary values
form
Describe one advantage File size is reduced so it is quicker to upload
of using lossy
compression on an image
that will be used on a
website
Describe one Quality of the image is reduced because data is lost
disadvantage of using
lossy compression on an
image that will be used on
a website
Save Groups
Explain how sampling is - Height is measured and converted to binary
used to store audio - Sample taken at a regular interval (44,000 times per
recordings second)
Define what is meant by Number of samples taken per second
the term sampling
frequency
What are the effects of - The file size of the digital recording will be larger
increasing the sampling - The quality of playback of the digital recording will
frequency? be better
Describe how bitmap - Images are made of pixels
images are represented in - Each pixel is given a binary code which represents
binary the colour of that pixel
Explain why computers Computers consist of transistors which only have two
represent data in binary values
form
Describe one advantage File size is reduced so it is quicker to upload
of using lossy
compression on an image
that will be used on a
website
Describe one Quality of the image is reduced because data is lost
disadvantage of using
lossy compression on an
image that will be used on
a website
