What process involves converting a video signal from one resolution to another?

The process of converting a video signal from one resolution to another is known as scaling. This involves adjusting the resolution of the video image to fit a specific display or to meet certain playback requirements. Scaling can either increase or decrease the resolution, thereby allowing images to be displayed correctly on screens of different sizes or aspect ratios. The scaling process can be applied in many scenarios, such as when a high-resolution video is played on a lower-resolution display or vice versa, ensuring that the visual output is optimized for the target device.

In contrast, compression refers to reducing the file size of a video for easier storage or transmission without significant loss of quality. Transcoding involves changing the format of a video file while maintaining the same resolution, and encoding is the process of converting data into a specific format for storage or transmission. These processes are related to video handling, but they do not specifically pertain to the adjustment of resolution. Thus, scaling is the term that accurately describes the modification of a video's resolution.