Channel coding

Channel coding is like adding extra pieces to a puzzle, to make sure all the pieces will fit together when it's finished. Imagine you are making a puzzle with your friend. You have a lot of pieces, so you need to make sure they all fit together and make a picture when you are done. To make sure this happens, you and your friend decide to add extra pieces (channel coding) to the puzzle. these extra pieces aren't part of the picture, but their job is to make sure all the pieces fit together. When you finish the puzzle, these extra pieces can be taken out and the picture is still there! That's how channel coding works. It helps make sure all the pieces of communication fit together nicely, so that the message is received and understood.