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Author Topic: Is a Mediator 4000Di worth it?  (Read 4739 times)

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Offline Zac67

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Re: Is a Mediator 4000Di worth it?
« Reply #29 from previous page: March 12, 2007, 07:24:42 PM »
All scan doublers / flicker fixers produce 'comb' artifacts at fast horizontally moving objects.
This is caused by both fields (usually) showing two different pictures spaced 1/50th second apart. Only professional scan doublers and modern digital TVs avoid this by interpolating between the frames - which might be more or less successful.

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Offline Jose

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Re: Is a Mediator 4000Di worth it?
« Reply #30 on: March 12, 2007, 07:29:34 PM »
@Zac67

It was more than that as it showed up even on nonmoving images. Maybe it was a defect one...
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Offline Akiko

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Re: Is a Mediator 4000Di worth it?
« Reply #31 on: March 12, 2007, 07:44:10 PM »
@motorollin


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I'll go for the 4000Di when I can afford it.



Sell the CV64 and your already half way there :-)
 

Offline motorollinTopic starter

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Re: Is a Mediator 4000Di worth it?
« Reply #32 on: March 12, 2007, 08:36:22 PM »
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Akiko wrote:
Sell the CV64 and your already half way there :-)

Maybe the sale of my X-Surf will provide the other half :idea:

--
moto
Code: [Select]
10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
 

Offline alexh

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Re: Is a Mediator 4000Di worth it?
« Reply #33 on: March 12, 2007, 11:04:35 PM »
Quote

Zac67 wrote:
All scan doublers / flicker fixers produce 'comb' artifacts at fast horizontally moving objects.
This is caused by both fields (usually) showing two different pictures spaced 1/50th second apart. Only professional scan doublers and modern digital TVs avoid this by interpolating between the frames - which might be more or less successful.

Read

Amiga screens are (for the most part) non interlace and dont suffer from these artifacts.

The main cause of artifacts with the external scandoublers (including some in lower cost LCDTV's) is noise introduced due to analog (A2D) sampling of the RGB signals. The signals go from Digital->Analog->Digital->Analog->Digital sheesh!

Clip-on internal scandoublers and video slot scandoublers dont suffer from this as bad as they get the signals before the video DAC and so only go Digital->Analog->Digital

I guess the ultimate scandoubler would be internal to DVI where it would stay 100% in the digital domain.