Communication Management Professional (CMP) Practice Exam

Standard video images are typically defined by their resolution, which refers to the number of distinct pixels that can be displayed. For standard definition television (SDTV) in the United States, the traditional format is known as 480i, which indicates a resolution of 480 lines of vertical resolution.

However, when referencing a more specific format, the number 525 often comes into play, as this is the total number of scan lines in the NTSC (National Television System Committee) standard television broadcast system. During the display process, only 480 of these scan lines are visible, which is essential to note for understanding the viewing experience.

This distinction is important in the context of video formats — while 480 lines are indeed the number of lines visible in actual playback (and represented in the 480i designation), the traditional television standard recognizes the total of 525 lines in the signal itself. Therefore, citing 525 in relation to standard video images aligns accurately with this traditional standard of television broadcasting.

Understanding this context clarifies why the choice mentioning 525 lines is a correct representation of standard video images, as it captures the full broadcast specification associated with standard definition video.