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7 posts

Wannabe Geek


Topic # 115168 15-Mar-2013 23:03
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Hi there,

I have sky (satellite) connected from the sky box to the tv with av leads (red white and yellow), and then the Home theatre connected via optical cable (from optical out on tv to optical in on HT).
The problem is that the sound on the home theatre is slightly AFTER the video (and thus the option to delay the sound by 0-300ms is only going to delay it further and make it worse).

The model numbers/details are:
BH6520TW - LG Home Theatre
47LM6410-TB - LG TV

Has any body else had this problem? Playing the sound through the TV Speakers is fine, it is just when it comes to the HT that things are not right.

I have tried using separate red and white plugs to take the audio from the satellite box straight to the home theatre (via the av in), and this makes the sound too early - I know I could then use the delay feature to fix this, but I would rather use the optical in so I can use the AV for something else, and so I am able to use the simplink function and use one remote for both devices (If simplink is on, it automatically changes the audio on the HT to optical when I change the TV to watch satellite).

Thanks heaps in advance,
Brent

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752 posts

Ultimate Geek
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  Reply # 782688 16-Mar-2013 14:25
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If the simplink functionality is important, then you'll have to live with the lag, or find a way to introduce video lag to counter the audio lag. This might be achieveable with some heavy post-processing picture presets on the TV, but failing that, an addtional piece of hardware may be required. I don't know of anything specifically, but I imagine something along the lines of a Composite to HDMI transcoder would have at least 48ms of lag (probably more). Anything that buffers the video before it outputs it basically.
Perhaps you can find a device that everyone is complaining about and start there.

I recently purchased a Google TV box which has 112ms of lag, but that doesn't have Composite input and I doubt there are any on the market that do.

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  Reply # 782778 16-Mar-2013 21:16
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Turn off the processing options on the home theater and it should come right. Otherwise you will have to look thru the tv menus to see if it has something to counteract the delay that the HT amp is adding.




Richard rich.ms

 
 
 
 


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Ultimate Geek
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  Reply # 782781 16-Mar-2013 21:45
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richms:should come right....
...see if it has something


Are you going to be around when they come back and can't find the magical 'make my audio process faster' function?

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  Reply # 782783 16-Mar-2013 21:59
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No, you turn the processing off, its called source direct on my amp and removes all lag from the input to output which makes skype more bareable on it.




Richard rich.ms

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Ultimate Geek
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  Reply # 782786 16-Mar-2013 22:04
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The video and audio are being sent to the TV. The TV is routing the audio out to the HT. The video is being processed and displayed before the HT can receive and process it.
This is confirmed by the fact that they tested sending audio directly to the HT and found the audio ahead of the video.

Optical outputs are great for the TV tuner, but they suck for external sources like Sky boxes.

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  Reply # 782787 16-Mar-2013 22:07
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I get no lag going from analog or hdmi inputs to the optical out on my tv, with the optical going to a cheap nasty DA box and then my wireless headphones.

I have to do it that way since stupid samsung put a switching 3.5mm jack on the back of a totally slim wall mountable tv, so if I plug my wireless headphones in there then it cuts out the tv speakers with no menu option to turn back on.





Richard rich.ms

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  Reply # 783073 17-Mar-2013 19:17
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Am i correct in thinking that the only company that still offers a dedicated analogue stereo audio output... Is Panasonic?



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Wannabe Geek


  Reply # 783142 17-Mar-2013 22:13
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Guessing I'm going to just have to go back to the AV plugs and then add delay to the audio until its right.
Might be better if/when sky bring a different output than AV to their decoders (minus mysky which I don't want to have to fork out for)
Thanks for the help though guys!

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Ultimate Geek
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  Reply # 783152 17-Mar-2013 22:31
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Brentbwood:
Might be better if/when sky bring a different output than AV to their decoders (minus mysky which I don't want to have to fork out for)


There already is one. The Pace silver box. It has optical. It won't cost you anything either.




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  Reply # 783158 17-Mar-2013 23:00
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fahrenheit:
Brentbwood:
Might be better if/when sky bring a different output than AV to their decoders (minus mysky which I don't want to have to fork out for)


There already is one. The Pace silver box. It has optical. It won't cost you anything either.



Oh really? How do I get that?

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  Reply # 783163 17-Mar-2013 23:11
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Ring Sky and ask for it.

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  Reply # 783245 18-Mar-2013 09:02
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fahrenheit:

There already is one. The Pace silver box. It has optical. It won't cost you anything either.



Really? My Pace silver box doesn't have optical out, only A/V and Scart.

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  Reply # 783260 18-Mar-2013 09:23
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B1GGLZ:
fahrenheit:

There already is one. The Pace silver box. It has optical. It won't cost you anything either.



Really? My Pace silver box doesn't have optical out, only A/V and Scart.


So there is more than one model? Well thats annoying.
The model we had before getting Mysky HDi was a very small box, significantly smaller than the other black ones. Sky also provided a Component cable with it.

Like the OP, we had an older black box and went from an old CRT to an HDTV. Initially, Sky wanted to charge us for swapping boxes but I made it clear to them that I wasn't happy about the fact that we were long-term customers and they were installing the new box for every new sign-up. They agreed to drop the charge and they also installed a new LNB when they came to deliver it (which ended up a requirement for MySky HDi, which we ended up getting 12 months later).

I believe if you have a local Sky office, you can walk in off the street with decoder in hand and a copy of your bill and you should be able to do a straight swap.

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