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Aspect Ratio |
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| Geometry of Projected Image | ||||||||||||||
Description |
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| With Anamorphic | |||||||||||||||||
Setting |
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| (1.7:1 Screen) |
| Lens (.5:1 Screen) | |||||||||||||||||
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| Letterbox mode |
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| scales (zooms in |
| 16:9 |
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| on) a 4:3 image lin- |
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Letterbox | early (by the same |
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amount on all sides) |
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| to fill a 16:9 display, |
| 4:3 |
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| cropping the top and |
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| bottom of the image. |
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| 4:3 Narrow linearly |
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| scales the source |
| 16:9 |
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| active image hori- |
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4:3 Narrow | zontally, so that a |
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4:3 source has the |
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| correct aspect ratio |
| 4:3 |
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| when using an an- |
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| amorphic lens. |
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| Select Native to |
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| display the source |
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| signal in its native |
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| 1080i HDTV Image |
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| 1080i HDTV Image |
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| resolution, centered |
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| in the display area |
| 16:9 |
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| with no |
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| overscan. |
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| This means, for |
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| 720p HDTV Image |
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| 720p HDTV Image |
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| example, that 720p |
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Native | HDTV programs will |
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display with unused |
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| pixels on all sides: |
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| 320 on the left and |
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| right sides and 180 |
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| 480i SDTV Image |
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| 480i SDTV Image |
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| above and below. |
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| With SDTV and |
| 4:3 |
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| EDTV sources, the |
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| LED1081 scales the |
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| 1024x768 PC Image |
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| 1024x768 PC Image |
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| |||
| image horizontally to |
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| achieve a 16:9 as- |
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| pect ratio. |
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| Table |
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operaTion 41