What is your problem?

If you watch a TV channel that broadcasts in 16:9 (large movie format) on a television with a 4:3 format (the traditional television format), the image will be distorted. With black horizontal or vertical bars, you can adapt the format of the TV image to that of your screen.

Is the image stretched vertically? This is because the TV channel concerned broadcasts in 16:9 and you have a 4:3 screen.

Example of an image stretched vertically (the channel broadcasts in 16:9 but your TV has a 4:3 screen)

With the black horizontal bars, your 4:3 screen resembles a 16:9 screen and the image is no longer
distorted.

Example of an image broadcast in 16:9 and adapted to a 4:3 screen

Is the image stretched horizontally? This is because the TV channel concerned broadcasts in 4:3 and you have a 16:9 screen.

Example of an image stretched horizontally (the channel broadcasts in 4:3 but your TV has a 16:9 screen)

With the black vertical bars, your 16:9 screen resembles a 4:3 screen, and the image is no longer
distorted.

Example of an image broadcast in 4:3 and adapted to a 16:9 screen