It is currently 21 Mar 2019, 16:29




 Page 1 of 1 [ 5 posts ] 
Author Message
 Post subject: 2144: Inter Frame Motion Detection setting
PostPosted: 13 Mar 2019, 02:51 
Serious fan
Serious fan
User avatar

Joined: 17 Mar 2014, 07:26
Posts: 165
Location: Japan
Has thanked: 37 times
Been thanked: 5 times
The Inter Frame Motion Detection setting: Anyone messed with this?

The manual says "Controls the trade-off between minimizing combing artifacts (small values) verses maximizing detail (larger values) when deinterlacing video sources (not applicable for film)."

It is set at 6 by default. One direction is supposed to be more accurate and the other more effective.

I haven't found any difference sliding it all the way one way or the other, though.
Offline
 Profile  
 
 Post subject: Re: 2144: Inter Frame Motion Detection setting
PostPosted: 13 Mar 2019, 06:42 
True fan
True fan
User avatar

Joined: 08 Dec 2015, 01:43
Posts: 439
Location: Japan
Has thanked: 14 times
Been thanked: 22 times
Good question ! Same for me !
_________________
LD-X1 (NTSC)
LD-V4300D (PAL/NTSC)
CLD-959 (NTSC)
CXUHD (DVD/BD/UHD/SACD)
Lumagen 2144 (scaler)
Collection
Offline
 Profile  
 
 Post subject: Re: 2144: Inter Frame Motion Detection setting
PostPosted: 13 Mar 2019, 09:43 
Jedi Initiate
Jedi Initiate
User avatar

Joined: 16 May 2009, 18:05
Posts: 2940
Location: MA USA
Has thanked: 5 times
Been thanked: 27 times
Smaller values favores video mode deinterlacing and larger values favores film mode deinterlacing.

You need to understand, film material is already progressive full frames later to be interlaced into two fields (even and odd lines) due to the limitations of NTSC. In film mode, deinterlacier finds the matching fields and combines them. It’s a simple operation but cadence needs to be picked correctly for it to work. Technically all film footage should be 3:2 cadence but anamollies exists between edits and film/video mixed footage (tv series, anime, etc)

Video is shot on video cameras which capture images in fields. There are no two matching fields to combine. Deinterlacer double these fields to make up a full frame using interpolation. Basically assumes the missing lines.

I mentioned cadence detection above. When the deinterlacer can’t pick the cadence, it uses video mode (interpolation) even on film material. Typically most deinterlacers will look for 3:2 cadence and if it’s not 3:2, it will apply interpolation to double those fields. Yoi favor video mode in this setting and radiance will revert to video mode more often. This often yields softer picture because you only have half the resolution (one field) to scale up to full resolution. Less combing because interpolation smooths out the jaggies.
_________________
Wanted
HD-VMD Discs
Hi-Vision/Muse Discs Only complete/mint!
Offline
 Profile  
 
 Post subject: Re: 2144: Inter Frame Motion Detection setting
PostPosted: 15 Mar 2019, 04:14 
Serious fan
Serious fan
User avatar

Joined: 17 Mar 2014, 07:26
Posts: 165
Location: Japan
Has thanked: 37 times
Been thanked: 5 times
substance wrote:
Smaller values favores video mode deinterlacing and larger values favores film mode deinterlacing.


Thanks, substance, your posts are always very informative.

Why does the 2144 manual state "...when deinterlacing video sources (not applicable for film)"?

I would read that as that the values are disregarded (Inter Frame Motion Detection is turned off) when in film mode?
Offline
 Profile  
 
 Post subject: Re: 2144: Inter Frame Motion Detection setting
PostPosted: 15 Mar 2019, 06:29 
True fan
True fan
User avatar

Joined: 08 Dec 2015, 01:43
Posts: 439
Location: Japan
Has thanked: 14 times
Been thanked: 22 times
Thank you substance !
Your explanation is so interesting !
Then 0 = video mode, 15 = film mode. And auto is using values between 1 and 14 to detect more or less the video timing.
I will try some tests this week end !
_________________
LD-X1 (NTSC)
LD-V4300D (PAL/NTSC)
CLD-959 (NTSC)
CXUHD (DVD/BD/UHD/SACD)
Lumagen 2144 (scaler)
Collection
Offline
 Profile  
 
Display posts from previous:  Sort by  
 Page 1 of 1 [ 5 posts ] 


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to: