A1.1.8 questions

What is transform coding?

Transform coding is a lossy technique that converts data into a frequency-based format and removes high-frequency details.

What is run length coding?

RLE is the lossless technique that replaces consecutive repeating occurrences of a symbol with a single instance followed by a count.

What is Huffman coding?

A lossless compression method that assigns short binary codes to more common symbols.

What is the difference in data integrity between lossy and lossless compression?

Lossless compression preserves original data, while lossy compression discards some data.

What are the applications of lossy compression?

Ideal for multimedia formats like images, audio and video.

What is lossy compression?

Lossy compression reduces file size by discarding some data that is less noticeable.

How does lossless compression achieve data restoration?

By identifying and eliminating redundant patterns without losing any information.

What is lossless compression?

Lossless compression allows the original data to be perfectly reconstructed from the compressed version.

Why is compression important in modern computing?

It enables faster data transfer, reduced storage costs, and optimised performance.

What is compression?

Compression is the process of reducing the size of a data file to save storage space and improve transmission efficiency.

When is lossless compression ideal?

For critical data where preservation of data quality is essential.

Why does compression matter?

Storage efficiency

Faster transmission

Resource optimisation