1.42 aspect ratio

Question

Level 1

55 points

1.42 aspect ratio

Where is the 1.42 aspect ratio derived from?

I have searched these forums and looked on the web but I can't find a definitive answer. Is it the ratio of 16x9 non-square?

5x4 = 1.25 = 720x576
4x3 = 1.33 = 768x576
16x9 = 1.78 = 1024x576

Thanks.

Weenie

imac, Mac OS X (10.5.4), 24", Intel 2.8Ghz, 4GB RAM, 1TB Drive

Posted on Sep 20, 2008 2:08 PM

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Answer 1

Nick Holmes

Level 7

30,018 points

Sep 20, 2008 2:19 PM in response to deaniweenie

Just to deliberately confuse the issue, from the Shake User manual:

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Answer 2

deaniweenie Author

Level 1

55 points

Sep 20, 2008 2:55 PM in response to Nick Holmes

I am confused. If you dive 16 by 9 you get 1.78 not 1.42. Where does the 1.42 come from.

Weenie

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Answer 3

deaniweenie Author

Level 1

55 points

Sep 20, 2008 2:57 PM in response to deaniweenie

I meant divide

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Answer 4

deaniweenie Author

Level 1

55 points

Sep 22, 2008 4:35 AM in response to deaniweenie

Does anyone know how the 1.42 aspect ratio is derived?

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Answer 5

Sep 22, 2008 5:21 AM in response to deaniweenie

As Shane mentioned above 16 x 9 PAL, like 4 x 3 PAL, consists of 720 x 576 pixels

16/9 = 1.777

1.777*576=1023.552 (the apparent number of pixels across the screen)

1023.552/720=1.42

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Answer 6

Andy Mees

Level 6

12,610 points

Sep 22, 2008 5:59 AM in response to Frank Hand

except it was Nick not Shane that posted the details

....

once more for luck, 1.42 is not the display aspect ratio, rather it denotes the *pixel aspect ratio* (the aspect ratio of the pixels) in 16:9 PAL D1

so 720 x 1.42 = 1024 (approx)
and 1024 x 576 = 16:9

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Answer 7

Sep 22, 2008 5:51 AM in response to Andy Mees

Sorry Nick! I've obviously been reading too many posts today!

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