Lossy Compression
- Works by removing non essential information
- The heavily compressed images looks untidy, blocky compression.
- However, we can make out the subject of the image well, but the degree to which they are compressed comes at the cost of quality
- Sound compression works in a similar way
- MPS files use lossy compression
- Voice is transmitted over the internet or mobile telephone networks using lossy compression
Lossless Compression
- Works by recording patterns in data rather than the actual data
- Using these patterns and a set of instructions on how to use them, the computer can reverse the procedure and reassemble an image, sound or text file with exact accuracy and no data is lost.
- Results in a much larger file than a lossy file, but one that is still significantly smaller than the original
Computer Science 