Okay, let's imagine you have a toy car that is made for roads that are really wide. But you want to play with the car on a narrow street that you made in your toy city. So you take the car and shrink it down to fit the narrow street.
Reverse standards conversion is like doing the opposite of that. Imagine you have a video that was made to work on TV screens in Japan, but you want to watch it on your TV screen in the United States. The problem is that the TV screens in Japan and the United States work differently. They have different standards or rules for how they show pictures.
So, to fix the problem, you have to change the video to fit the rules of the TV in the United States. This is called standards conversion. Imagine taking the toy car that you shrunk down and putting it back to its original size.
But sometimes, people want to take a video that was made for a certain TV screen and play it on another TV screen that has different rules. This is where reverse standards conversion comes in. It's like taking that shrunken toy car and making it small again so it can fit on the big wide road.
So, in this case, reverse standards conversion means changing the video back to fit the rules of the TV screen it was originally made for. It's like taking the toy car that you made smaller and putting it back to its bigger size so it can fit on the wide road again.