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LG LST-4100P STB with LG CRT RPTV


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I have a LG CRT RPTV (HD Ready) which came with the LST-4100P STB by redemption. So far everything is working fine except for the combination of a broadcast signal in 1080i being output at 720p by the STB... this causes the image to blink on the TV (a few times every second it seems).

Although I may not use this combination normally, my concern is whether it should work fine or is the blinking to be expected?

I am using the VGA connector on both the STB and TV (on the TV this input accepts 576p, 720p and 1080i).

Thanks for any and all help.

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Perhaps the latest firmware can help you out (v1.00.05).. it fixes the following:

- Added screen positioning function on DVI/RGB.

- Fixed screen flickering to 720P on DVI. (Input source is 1080i)

- Added screen zoom when using MPEG display extension information.

Although you use the VGA connection, maybe this update corrects the problem on that as well.

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I noticed this too. Setting the LG to 720p on DVI, I encoded:

1440 x 1080i ....... picture was fine

1920 x 1080i ....... picture had pauses, long horizontal blinking sections.

Both would freeze after about 10 mins if the video was encoded at greater than about 20Mbits/s.

Weird, maybe they only tested this STB in an area with only 1440x1080i broadcasts (Sydney or Adelaide)?

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Perhaps the latest firmware can help you out (v1.00.05).. it fixes the following:

- Added screen positioning function on DVI/RGB.

- Fixed screen flickering to 720P on DVI. (Input source is 1080i)

- Added screen zoom when using MPEG display extension information.

Although you use the VGA connection, maybe this update corrects the problem on that as well.

thanks FrozenPea :blink: ... I'll see if I can dig up a null modem cable somewhere and update the firmware.

Also... it's a pity you can't change the output via the remote :P

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Check out latest thread fro Scubas

sccubas Posted: Sep 23 2004, 10:14 AM 

Posts: 21

Joined: 29-July 04

Hi. Everyone!

The software version of LST-4100P is has been changed from 1.00.05 to 1.00.06.

We fixed the following problems:

1) The inprovement of flickering problem when broadcasts display 1920X1080i and STB's resoultion switch set to 720P.

2) The improvement of Aspect ratio, we added a new pillar box and zoom function on 16X9 broadcasting.

Please e-mail me if you want a new software.

 

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sccubas Posted: Sep 23 2004, 10:14 AM 

The software version of LST-4100P is has been changed from 1.00.05 to 1.00.06.

We fixed the following problems:

1) The inprovement of flickering problem when broadcasts display 1920X1080i and STB's resoultion switch set to 720P.

2) The improvement of Aspect ratio, we added a new pillar box and zoom function on 16X9 broadcasting.

Thanks sccubas... 1.00.06 has fixed the flickering problem I was having.

About point 2... is that something that is user-accessable? Could you elaborate on it a bit more?

Cheers.

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I tried the new version v6 and found that the picutre is off to the right when using component connections. This was one of the original problems with version v4 so im sticking to v5.

The A.Ratio button seems to work fine with v6 but i want a centred picture in normal 'full' mode using component.

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I tried the new version v6 and found that the picutre is off to the right when using component connections. This was one of the original problems with version v4 so im sticking to v5.

The A.Ratio button seems to work fine with v6 but i want a centred picture in normal 'full' mode using component.

Why not make use of the stb's screen positioning capability (added in 1.00.05) to correct this?

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  • 3 weeks later...
I have a LG CRT RPTV (HD Ready) which came with the LST-4100P STB by redemption. So far everything is working fine except for the combination of a broadcast signal in 1080i being output at 720p by the STB... this causes the image to blink on the TV (a few times every second it seems).

Although I may not use this combination normally, my concern is whether it should work fine or is the blinking to be expected?

I am using the VGA connector on both the STB and TV (on the TV this input accepts 576p, 720p and 1080i).

Thanks for any and all help.

I have just received my LST-4100P by redemption from LG (yes they lost my original form after 6 weeks waiting!).

I also have the CRT RPTV (HD Ready) and also get the flicker when on 720p and the broadcast signal is 1080i.

Just wondering where I could get the latest firmware? I have a null modem cable & laptop available...

Also just wondering I connected up via an RGB cable for the first time last night. The picture quality both SD and HD is not what I expected. I know my RPTV is capable of a better picture because my current analogue setup is perfect and my component input from the Pioneer DVD Player is even better.

But with the RGB input any writing displayed seems to light up a band the height of the writing all across the screen. I have checked contrast etc and think it maybe the cable. My DVD player is connected via compenent and a black screen with writing is completly sharp and shows no sign of this effect.

I just picked up a cheap RGB cable (5 metres in length). I need at least 2.5 metres but could not find one at the time. Can I assume it is the cable? I just assumed all RGB cables were the same.

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I have a LG CRT RPTV (HD Ready) which came with the LST-4100P STB by redemption. So far everything is working fine except for the combination of a broadcast signal in 1080i being output at 720p by the STB... this causes the image to blink on the TV (a few times every second it seems).

Although I may not use this combination normally, my concern is whether it should work fine or is the blinking to be expected?

I am using the VGA connector on both the STB and TV (on the TV this input accepts 576p, 720p and 1080i).

Thanks for any and all help.

I have just received my LST-4100P by redemption from LG (yes they lost my original form after 6 weeks waiting!).

I also have the CRT RPTV (HD Ready) and also get the flicker when on 720p and the broadcast signal is 1080i.

Just wondering where I could get the latest firmware? I have a null modem cable & laptop available...

Also just wondering I connected up via an RGB cable for the first time last night. The picture quality both SD and HD is not what I expected. I know my RPTV is capable of a better picture because my current analogue setup is perfect and my component input from the Pioneer DVD Player is even better.

But with the RGB input any writing displayed seems to light up a band the height of the writing all across the screen. I have checked contrast etc and think it maybe the cable. My DVD player is connected via compenent and a black screen with writing is completly sharp and shows no sign of this effect.

I just picked up a cheap RGB cable (5 metres in length). I need at least 2.5 metres but could not find one at the time. Can I assume it is the cable? I just assumed all RGB cables were the same.

PM ur email address to me and i'll send it over to you straight away.

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Also just wondering I connected up via an RGB cable for the first time last night. The picture quality both SD and HD is not what I expected. I know my RPTV is capable of a better picture because my current analogue setup is perfect and my component input from the Pioneer DVD Player is even better.

But with the RGB input any writing displayed seems to light up a band the height of the writing all across the screen.  I have checked contrast etc and think it maybe the cable. My DVD player is connected via compenent and a black screen with writing is completly sharp and shows no sign of this effect.

I just picked up a cheap RGB cable (5 metres in length). I need at least 2.5 metres but could not find one at the time. Can I assume it is the cable? I just assumed all RGB cables were the same.

It sounds like you and I have the same TV and STB joedan. I also have connected via RGB... I got a XVGA cable from DSE and it is working perfectly. I have my DVD player connected via component 2 (progressive input) and my Toppy via SCART (RGB). The latter two cables are the Concord range from Jaycar... great cables for the price IMHO. I'm very happy with the picture I'm getting but only after I set Contrast, Brightness, Color and Sharpness for each input. I find its best to adjust them while something with good flesh tone is on (the only thing Home and Away is good for). :blink:

Cheers.

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Thats very interesting. I too had a look at DSE and found a standard VGA cable and an XGA cable. Not sure what the difference is but I assume it is quality related.

Anyway I made the worst mistake in buying a dodgy el-cheapo 5M VGA cable, now I have just ordered a Lindy VGA cable to hopefully give the LG set top box / TV some justice.

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I do believe that VGA only supports 256 colours (obviously not enough for tv-video) which probably explains some of your problems.

On further investigation, it also seems that VGA does not support progressive video signals either, but XGA does... so again, this is probably your problem - trying to pump 720p through a cable whos interface specs only support interlaced signals.

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I've installed v6 software on my LG and it has re-introduced the 1080i offset problem on component that was fixed with v5. I was hoping it would fix my 720P problem, (it only displays 720 as a 4:3 squeezed version of 16:9), but unfortunately it didn't. I think I might have to revert back to v5.

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I do believe that VGA only supports 256 colours (obviously not enough for tv-video) which probably explains some of your problems.

On further investigation, it also seems that VGA does not support progressive video signals either, but XGA does... so again, this is probably your problem - trying to pump 720p through a cable whos interface specs only support interlaced signals.

This does not make sense to me. A cable is a cable. A VGA cable is another term for D-Sub or 15 pin cable; the same cable your CRT computer monitor uses. I doubt whether you'd see any difference in the picture quality whether you used the most expensive or the least expensive cable available, unless you are using very long runs, or unless the cable is faulty. The number of colours and the resolution has nothing to do with the copper wire connecting your devices, however, I believe very long runs of DVI cable (in excess of 5 metres) might noticeably degrade the image.

On my projector, only the RGB (VGA) input will display a picture from the LG LST-4100P at 1080i. DVI is 'out of sync'. I assume this is due to a limitation of my Hitachi projector. It's an SXGA+ projector (1365x1024) and I happen to know that the DVI output from an ATI video card will not operate at the full resolution of the projector.

The disadvantage of both RGB and DVI on my system is the lack of certain colour controls. There are fewer controls for colour and no tint controls, therefore the source material has to be good to use RGB or DVI. The component inputs allow for the greatest control of colour. The 'tint' control is sometimes essential to get accurate skin tones.

I also get the slow flicker or blinking with 720P, but only during a 1080i transmission. I thought it might be due to a limitation of my projector, so I'm pleased to hear that there's a firmware update to fix this. Haven't got a clue how to install the update though. Can't find a reference to it in the manual.

I think 720P might be preferrable to 1080i and also DVI works at 720P with the same slow flicker, but if it's a standard transmission, the projector's circuitry will do the scaling to 720P so there appears to be little advantage. It's not a big deal, but on my system I see scan lines on moving parts with 1080i.

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You are right about the cables... in hindsight, i was thinking more about vga vs xga and just slipped in the cable reference without thinking about it. silly me. While the same cable can be used for both formats, there are some subtle limitations when using xga+ such as distance/degredation.

As for the firmware, pm me ur email and i'll send you everything you need.

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