Which statement correctly describes the NTSC 4:3 aspect ratio?

Which statement correctly describes the NTSC 4:3 aspect ratio?

• A. It is the vertical resolution
• B. It is the width-to-height ratio
• C. It is the color encoding scheme
• D. It is the audio sampling rate

Answer: (B)

Understanding aspect ratio means knowing how wide an image is relative to its height. NTSC 4:3 defines the classic TV shape: for every 4 units of width there are 3 units of height. This describes the image’s proportions, not its resolution, color system, or audio sampling. So it’s the width-to-height ratio that NTSC 4:3 describes. In practice, this ratio affects how content fits on screens—content designed for 4:3 may be letterboxed or cropped on a 16:9 display, and it’s separate from vertical resolution, color encoding schemes, or audio sampling rates.

Understanding aspect ratio means knowing how wide an image is relative to its height. NTSC 4:3 defines the classic TV shape: for every 4 units of width there are 3 units of height. This describes the image’s proportions, not its resolution, color system, or audio sampling. So it’s the width-to-height ratio that NTSC 4:3 describes. In practice, this ratio affects how content fits on screens—content designed for 4:3 may be letterboxed or cropped on a 16:9 display, and it’s separate from vertical resolution, color encoding schemes, or audio sampling rates.