standard-definition television

References

Images

Side-by-side comparison of standard-definition TV (SDTV) and high-definition TV (HDTV) aspect ratios using an image of an airplane. The SDTV screen is 4 units wide by 3 units tall, while the HDTV screen is 16 units wide by 9 units tall. Both screens show dashed rectangles indicating the safe action area (90 percent) and safe title area (80 percent) within the frame.

standard-definition television: Media

electronics

Images

Side-by-side comparison of standard-definition TV (SDTV) and high-definition TV (HDTV) aspect ratios using an image of an airplane. The SDTV screen is 4 units wide by 3 units tall, while the HDTV screen is 16 units wide by 9 units tall. Both screens show dashed rectangles indicating the safe action area (90 percent) and safe title area (80 percent) within the frame.

picture tube aspect ratios for SDTV and HDTV

Since some of the picture information flows off the top, sides, and bottom of a...

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