Confirmed: vip2250 fixes surround sound audio dropouts!

Mentor

Confirmed: vip2250 fixes surround sound audio dropouts!

I had a vip1225 hooked up via HDMI to an Onkyo receiver (HT-S8400 to be specific) and I had problems with audio dropouts on surround.  Every few seconds, for a fraction of a second, the audio would drop.  It drove me nuts and I tried everything to fix it.. I tried different (new) HDMI cables, and even a different home theater system!   In the end, I had to keep it on stereo.

 

I went over and over this with UVerse support.  They kept wanting to send me to the paid support line for help configuring my home theater system and out of four techs I spoke to, none ackowledged hearing anything about audio dropouts over HDMI with surround.  In fact, they kept insisting that I plug the HDMI straight to the TV and I kept having to explain my TV is a stereo device, not a surround device so it's not a good test.  They also immediately started jumping on the bandwagen saying surround sound is out of scope.  I saw a couple of posts about the vip2250 fixing this issue but none of the techs would entertain that idea.

 

Finally I pled my case to a very nice agent in billing who had to go WAY out of her way to get me a vip2250.  Hooked it up and sure enough all audio dropout problems are resolved!

Message 1 of 129 (8,040 Views)
Tutor

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

I have been a uverse subscriber for 2.5 years and experienced audio drop outs from day one. I obtained a Vip2250 about a month ago to resolve an issue unrelated to the audio drop outs. I have a Pioneer VSX-1015TX receiver. I can say now with certainty the new DVR does NOT resolve the audio drop outs for me. No worse...no better!

Message 76 of 129 (6,683 Views)
Expert

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

I guess it is a good idea to add YRMV about the 2250s.  Bummer.

Message 77 of 129 (6,680 Views)
Highlighted

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

I convinced AT&T to replace my old VIP DVR with the VIP 2250 in an effort to solve the sound skips/dropouts. It did not change anything! But, it is nice to have a higher capacity disk.

 

My setup uses sends the 2250 HDMI signal to my Denon AVR-2112 and from there via HDMI to my LG 55LW5700 TV. The sound output on the 2250 is set to 5.1. The skips do stop if I use simple 2 channel output (which totally defeats the purpose of having a surround sound system).

 

The 2250 runs very hot - I measured the temperature with an IR thermometer on the underside at 127°F. Even off, this thing runs hot!

 

Message 78 of 129 (6,620 Views)
Voyager

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

I've been experiencing similar issues to what's been described in this thread with my Onkyo HT-S3500 with audio dropouts on *some* U Verse stations and dvr recordings. When I change it to stereo mode the problem goes away, but obviously at the expense of surround sound. We only have two tv's and our other set (non-surround sound) has the VIP2250 box connected to it.

 

Could a solution to my issues be as simple as switching the boxes between our two tv's?

 

 

Message 79 of 129 (6,333 Views)
ACE - Expert

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

Yes, it is certainly worth a try.

 

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 80 of 129 (6,320 Views)
Teacher

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

[ Edited ]

I can confirm this as well.  I swapped out my VIP1225 for a VIP2250 and the audio dropout with DD 2.0 issues went away.

 

This is with an Onkyo NR-818

 

 

I should also note, it's a pain to get a 2250 at the moment.  CS does not have an option to ship you a 2250, they have an option to ship either a low or high capacity DVR.  A high capacity can get you a 1225 or a 2250 (or cisco box depending on your market).  You will need to explain your situation well to someone on the phone.  It took me 3 calls and nearly 3 hours of waiting while each rep tried their best.  Every CS was very helpful but they have their hands tied a bit in this situation.   When you ask for a specific model # their ordering software isn't setup to handle requests like this.

 

Best of luck to anyone trying to fix their drop out issues, I didn't have an issue until I changed receivers.  My VIP1225 worked fine with the Pioneer VSX-33 I had, but it started having drop outs when I changed to the Onkyo NR-818.  Luckily I found this post and stuck with it in tech support...

Message 81 of 129 (6,298 Views)
ACE - Expert

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

Glad to hear it's working for you and thanks for posting.
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 82 of 129 (6,278 Views)
Voyager

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

I did switch my two boxes last eve and, lo and behold, with the vip2250 connected to my Onkyo receiver the sound dropping issue has been resolved. Thanks for the advice, all!

Message 83 of 129 (6,233 Views)
ACE - Expert

Re: Confirmed: vip2250 fixes surround sound audio dropouts!


snoopy4331 wrote:

I did switch my two boxes last eve and, lo and behold, with the vip2250 connected to my Onkyo receiver the sound dropping issue has been resolved. Thanks for the advice, all!


That's great.  Thanks for letting everyone know!

 

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 84 of 129 (6,229 Views)
Tutor

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

We also have the surround sound audio drop out problem.  We have to switch to "stereo" unless we're watching a DVD.  We recently had the surround sound installed and the group that did it for us said they have many problems with AT&T customers and that we should ask for an upgraded receiver.

 

We have the old silver Cisco 4320 receiver.  I called AT&T to ask for the better receiver, but they wanted to send me to a technician for my audio problem.  What do I ask for to get this upgraded receiver without the runaround?  I'm not using the right words...

 

 

 

Message 85 of 129 (6,055 Views)
ACE - Expert

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

Sending a technician may be your best shot to get a new box, though... if he has the newer type on his truck.
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 86 of 129 (6,017 Views)
Teacher

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

[ Edited ]

I wanted to share some more experiences with the VIP2250.

 

It has some major video bugs.  They are doing something really funky with the lower gradients.  If you display a 16-50 gray scale map on the VT2250 it shows tints of red as well it's completely clipping 17-18!    (you can display pictures via image share)

 

Not to mention the grayscale is dynamically modified!  If I leave the a black clipping image up 16-30, the grayscale actually jumps around!  I see it remapping some of the gradients!  It does this with the video information that's still playing in the background.

 

 

IMO the VIP2250 is a huge mess video wise.  It may improve audio but the video is not good.  When I bring my normal non DVR box to this same TV none of these issues are present.

 

You can see the flaw im talking about simply in the U-verse screen where it says "press OK to watch TV".  Watch the background on a 2250, notice how it transaitions the blobs around and watch it on another box.  

 

1.   it shouldn't be clipping gradients 17,18,19

2.  It shoiuld not be remapping the grayscale! 

3.  There should be NO color in values 20-25.  They are red tinged.  This is bad!

 

All of these issues go away when I use my non DVR on the same TV.  This is also why people see more compression artifacts on the VIP2250, the gamma is lower with the video driver it's using.  And when that dynamic change happens the gamma gets even lower.

 

Also if you find yourself thinking there is a bit of black crush (lack of detail in dark areas) with uverse and you have a 2250, it's more than likely the DVR.  You can't calibrate the DVR correctly, it is clipping some dark details and doing bizzare stuff with the gamma.

 

p.s.

 

TV is calibrated with a photospectrometer (i1 pro), I dialed it in which is when I started to notice this stuff.

 

So in it's current status... if you switch to a VIP2250 to get fixed audio , but you'll end up with poorer quality video.  I verified this on multiple TVs swapping the boxes around.  So frustrating...   

 

So now I want my old DVR back unless someone can tell me there is a fix coming for the video driver in the VT2250. 

 

Do they not have Q&A testing?  these boxes should meet some very basic guidelines displaying basic test patterns before the software is pushed out and released.  I'm sure most people don't know to check for these things, but I bet people do notice these problems.

Message 87 of 129 (5,586 Views)
Expert

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

A few questions:

1. Have you compared a VIP1225 or VIP1216 next to it to see side-by-side differences?
2. Are you sure your TV is not doing dynamic contrast or some other setting?
3. Have you compared HDMI vs. Component outputs to see if the problems are isolated to only one particular connection?
4. Are you aware that nearly all modern TVs retain image settings (contrast, brightness, gamma, color management, etc.) on a per-input basis? e.g. If you've calibrated your TV using your Blu-Ray player on HDMI 1 but the U-Verse receiver is connected to HDMI 2, you have to copy the settings from HDMI 1 to HDMI 2 to get the calibration correct on that input?

Message 88 of 129 (5,575 Views)
Teacher

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

[ Edited ]

SomeJoe7777 wrote:
A few questions:

1. Have you compared a VIP1225 or VIP1216 next to it to see side-by-side differences?
2. Are you sure your TV is not doing dynamic contrast or some other setting?
3. Have you compared HDMI vs. Component outputs to see if the problems are isolated to only one particular connection?
4. Are you aware that nearly all modern TVs retain image settings (contrast, brightness, gamma, color management, etc.) on a per-input basis? e.g. If you've calibrated your TV using your Blu-Ray player on HDMI 1 but the U-Verse receiver is connected to HDMI 2, you have to copy the settings from HDMI 1 to HDMI 2 to get the calibration correct on that input?


1.  Yes, difference is substantial.    They don't need to be side by side to see some of the quirks.  Easily seen with same TVs and settings.  In fact anyone who's very famaliar with the blue stand by screen (press "OK" to watch tv) and how smooth the transitions should be in the blue areas that move around will see the difference right away in the 2250.  It's not smooth transitioning it's jerky and messy (gradients), you can see the gradients popping around.

 

2.  No, it's off.  It would be the AGC control on my VT50, and it's at 0.  The dynamic issue I bring up is I assume in the HDMI video driver in the STB or possibly the H.264 decoder?.  If you leave a HD program going on something like HBO, then bring up media sharing and display a photo (in this case a black clipping photo).  you can actually see the STB remap the gradients based on the video stream it's processing in the background.    So in this case I have a static picture up and the grayscale dynamically changes.  Are you famaliar with a black clipping slide use to set brightness?   If I tune to a channel that doesn't have video before I bring up the "media share" the image will never change, it's stable.  This is when I realized there's some connection to the STB processing the video and the grayscale popping around.

 

3.  I have tried 2 brand new 2250 boxes and only HDMI, both have done it.   I'll try component when I get some time, just to debug...

 

4.  sure, i've been calibrating TVs for many years now.  In this case I'm calibrating the ISF modes for the input in question via remote app called controlcal.   My experience level here is probably way above average.

 

 

The redish tinge in the dark grays (near black) and the clipped blacks are really annoying, that just shouldn't be.   The 2250 has a low gamme AND black crush.  Terrible combination.  The low gamma make sthe compression artifacts pop out even more and the clipped black make things look crushed in dark scenes.

 

And yes, I fully calibrated the grayscale using 10pt controls using a photospectrometer  Smiley Wink  My other STB box shows NO color in the bars unlike the 2250 (on the same TV and input/settings).

 

thanks for the reply Smiley Happy

 

Message 89 of 129 (5,571 Views)
Expert

Re: Confirmed: vip2250 fixes surround sound audio dropouts!

Interesting. It would seem that the VIP2250 has a fairly serious flaw in the video processing if it's doing what you're saying.

There are some unanswered questions, though. Since we can primarily only test the STBs using images from Media Share like you're doing, is this a bug in all video processing or just in the Media Share portion? There's not a good way to test, unless you might happen to catch the HDNet test patterns that they occasionally broadcast.

The VIP2250 does use a different CPU/H.264 decoder (Broadcom vs. Sigma Designs) and a different HDMI chip than the 1st generation STB units (VIP 1200, 1216, 1225). It would be interesting to determine whether these faults you've observed reside in hardware or in software, and in what stage of the video processing.
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