What is a key characteristic of Motion JPEG?

Motion JPEG (MJPEG) is characterized by its use of a sequence of individual JPEG images, where each image is treated as a separate frame for video. This means that each frame is encoded independently, allowing for straightforward editing and manipulation. The key aspect of this approach is that because the frames are independent, they do not rely on temporal compression techniques such as predictive coding used in formats like H.264. As a result, each frame can be accessed and processed independently, which simplifies streaming and playback but may result in larger file sizes compared to more efficient compression methods that take advantage of temporal coherence between frames.

In contrast, the other options do not accurately describe Motion JPEG. For example, MJPEG does not utilize advanced compression techniques like I/P frames, nor does it inherently include audio communication. It also doesn't optimize compression for specific regions of interest in the way that some advanced video codecs do, which might apply different compression rates based on the content of the scene. Thus, the defining feature of Motion JPEG is indeed the independence of its individual images.