A photographer decides to save space by compressing photo archives. The photographer considers both lossy and lossless methods. Compare the effects of each type of compression on file size and image quality, providing examples of suitable file formats for each type.
Compression Effects on File Size (3 marks) Read More »
Discuss the advantages and disadvantages of using lossy compression for online video streaming services.
Compression Advantages and Disadvantages (4 marks) Read More »
Explain why data compression is necessary in modern computing. Provide one common scenario where compression is applied.
Understanding Compression (2 mark) Read More »
Define the terms lossy and lossless compression and give one example of where each type might be used.
Types of Compression (4 marks) Read More »
A company decides to archive its documents. Would it be more appropriate to use lossy or lossless compression? Justify your answer considering the nature of the data involved.
Compression in Practice (2 marks) Read More »
Describe how the following factors affect the size of a sound file and the quality of its playback. Provide one point for each factor: a) Sample rate (Hz) b) Duration (seconds) c) Bit depth (e.g., 16-bit)
Impact on File Size and Quality (3 Marks) Read More »
A recording studio needs to digitise a 2-minute audio clip for a client who wants a balance between good quality and manageable file size. They are considering a sample rate of 44.1kHz and a bit depth of 16 bits. Calculate the approximate size of the resulting digital audio file and discuss whether this setup is
Sound File Calculation and Justification (3 Marks) Read More »
Describe what is meant by the term ‘colour depth’ in digital images and how increasing the colour depth affects the image quality and file size.
Colour Depth (3 marks) Read More »
Define image resolution and explain how increasing the resolution affects both the quality of an image and its file size.
Image Resolution (3 marks) Read More »
A digital image with a resolution of 800×600 pixels has its resolution doubled and its colour depth increased from 8 bits to 16 bits per pixel. Discuss the impact these changes will have on the quality and file size of the image.
Effects of Changing Resolution and Colour Depth (4 marks) Read More »
