How is flicker in the television picture typically avoided?

Flicker in television pictures can detract from viewer experience, so it’s essential to understand the methods used to avoid it. The correct answer encompasses several techniques that address the problem.

Using interlaced scanning helps to create a smoother image by alternating the display of odd and even lines of the picture. This method takes advantage of the persistence of vision, where the human eye retains an image for a fraction of a second, allowing for a more stable visual output over time.

Synchronizing the video signal between the camera and the monitor ensures that the image being captured and displayed is aligned in time. This synchronization prevents the mismatch that can lead to flicker, making the picture more stable and clear.

Scanning the odd lines followed by the even ones is a technique associated with interlaced scanning where the display is refreshed in two passes. This approach also reduces flicker by ensuring that the image is updated frequently enough to provide a fluid viewing experience without noticeable interruptions.

Since all these methods work together to enhance the quality of the visual output, reinforcing each other in preventing flicker, the option indicating that all of these techniques are used to avoid flicker is indeed correct.