Bedienungsanleitung Atomos Ronin (Seite 25 von 34) (Englisch)

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Atomos Ronin – User Manual Edition 1: June 2013 23

What is Pulldown?

Many professional and consumer cameras available

today do not send true 1080p24, 1080p23.98, 1080p25,

1080p29.97 or 1080p30 signals down their SDI or HDMI

outputs.

Instead they send 1080i59.94 in NTSC regions (eg USA, Japan), and

1080i50 in PAL regions (eg Europe)

In order to convert the signal from the internal recording format to

1080i5994 or 1080i50, they use a process called 3:2 or 2:2 pulldown.

Camera Setting Pulldown Ronin Receives

1080p23.98 3:2 1080i59.94

1080p24 3:2 1080i60

1080p25 2:2 1080i50

1080p29.97 2:2 1080i59.94

1080p30 2:2 1080i60

You will, of course, want the Ronin to record eg 1080p24, not 1080i60

to the disk. In many cases, it is not easy for the Ronin to detect the

pulldown operation in the video, so you will have to set the correct mode

in the Ronin as well as setting it on your camera.

With some cameras, the Ronin can detect and remove the pulldown,

in which case the mode you expect (eg 1080p23.98) will display on the

Ronin and you will not have to do anything further.

Atomos is adding auto-detection support for more cameras, please

check for ﬁrmware updates regularly at www.atomos.com

1080p23.98 or 1080p24

If you have set 1080p23.98 or 1080p24 in your camera and your Ronin

displays 1080i59.94 or 1080i60, then you can easily remove the pulldown

by following these steps:

• Press the blue arrow next to the video format

repeatedly until you see 1080p23.98 (or 1080p24) displayed.

You will see that the Mon button is dimmed. Your Ronin needs

to analyse the video for about 1 second, in order to detect the

pulldown sequence and remove it.

• If it is not automatically detected after 1 second, wave your hand

from side to side in front of the lens, or wave the camera from side

to side for a few seconds. The Ronin will detect the pulldown in the

movement, the input video format will show 1080p24 and the Mon/

Rec button will highlight.

3:2 pulldown detection is difﬁcult, if not impossible to detect on

completely still video. This is why you should wave your hand in front

of the lens.

If you lose the input detection – for example you unplug the SDI cable

or go to Playback mode, you will need to wave your hand or the

camera again, when the signal is restored to the Ronin.

Some cameras use a variant of pulldown removal, for example

Panasonic Advanced pulldown. The Ronin does NOT support this

format, and it will not be detected.

Standard Panasonic pulldown is supported, ensure in the Panasonic

camera settings that pulldown is not set to Advanced.

1080p25, 1080p29.97 or 1080p30

For these modes, simply press the blue arrow repeatedly until your

1080p desired format is displayed. There is no need to wave your hand

or the camera, as 2:2 pulldown removal does not require moving video.

Your Ronin always remembers whether you wanted 3:2 or 2:2

pulldown removal. If you change the format on your camera eg from

1080p24 to 1080i60, you will need set to the Ronin input to match

your camera setting again.

10. Pulldown

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