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No Audio on Four Channels

Discussion in 'TiVo Series3 HDTV DVRs' started by generaltso, Oct 3, 2006.

  1. TiVoJerry

    TiVoJerry 00-16 TiVo Employee

    1,511
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    Jul 26, 2005
    Alviso, CA
    Specifications for CableCARD products require support for AC3 audio streams. We have found that there are numerous cable companies who either don't generate an AC3 track or the track they do generate contains blank audio. We have been working to notify the noncompliant providers as we find out who they are. We continue to advise them of this shortcoming if they are not responding, but there is only so much pressure we can apply.

    In the meantime, we will be adding support for MPEG2 audio in our next major software release. Keep in mind that the Series3 DVR will still default to an AC3 track, if detected, even if that track only carries a blank audio stream. If your cable company continues to provide you service in this manner, it may be in your best interest to contact them directly. We are more than happy to point out that the specs call for a valid AC3 stream.

    We had hoped our communications to the providers would've proved fruitful before now, hence the delay in posting this information. However, with everyone pointing their fingers in our direction, it's time we cleared things up. I hope this helps.
     
  2. ashu

    ashu User title defunct

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    Nov 8, 2002
    MD
    Yeah - that's telling it like it is, thanks Jerry!

    In more curt fashion, from someone not bound to be polite to the cablecos - call and raise hell with them if they refuse to adjust this as required by the CableCard specs, and threaten to cancel (if you have an alternative)

    Or give up on those channels if they're being unhelpful, and continue to add a blank AC3 stream! I'm sure the companies that produce those channels would love to hear how the cable company in your neighborhood is making it nigh impossible for folks with a high-end home theater gadget like an S3 to watch their channel! If you're the letter-writting, BBB/Consumer Affairs contacting type - get snapping :)
     
  3. slimoli

    slimoli New Member

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    Jul 29, 2005
    Just got an email from the Tivo Helpforum also confirming that the MPEG audio support will be implemented with the 8.1 software release. Great stuff!

    Thank you Jerry.

    Sergio
     
  4. tazzmission

    tazzmission Member

    562
    2
    Oct 15, 2002
    North...
    I have called my cable company probably 10 times about this issue. They have been very nice on the phone, but still refuse to do anything. I spoke to an Engineer and he knows this is an issue. My provider is Comcast.

    And when is this 8.1 software going to be released? Every time I call TiVo they tell me in a month. Then that month comes and goes.
     
  5. Feb 3, 2007 #245 of 275
    tazzmission

    tazzmission Member

    562
    2
    Oct 15, 2002
    North...
    Got a call from Comcast asking me if I could explain my issue with no audio on one channel to then AGAIN. I was told that they would be in touch.

    We will see what happens.
     
  6. Feb 6, 2007 #246 of 275
    wmcbrine

    wmcbrine Ziphead

    10,368
    22
    Aug 2, 2003
    Is Verizon Fios on your list? It seems no S3 users on Fios are getting sound on 81 or 496 nationally, or on some others on a more local basis. Is there any way to tell from the S3 whether this is the problem?

    Good news. I don't suppose you could break it out into, say, 8.0.1d for faster release? :) Or is the next major release coming too soon for that to help?

    Edit: Sorry for smeeking. I was pointed here from another thread. However, my questions stand.
     
  7. Feb 7, 2007 #247 of 275
    generaltso

    generaltso Member

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    Nov 3, 2003
    Vermont
    Take a look and see if you have a number for the Audio PID on those channels. If there's no number and it says "NOT AVAILABLE", then you have this problem. If there's a number there, your problem is probably being caused by something else.
     
  8. Feb 7, 2007 #248 of 275
    tazzmission

    tazzmission Member

    562
    2
    Oct 15, 2002
    North...
    I got another call from Comcast yesterday asking me to check if I had sound on channel 163 (The channel I get no sound on).

    Still no sound.

    He said the engineers did something, but he has no idea what that something is.

    Just updating this thread.
     
  9. Feb 7, 2007 #249 of 275
    wmcbrine

    wmcbrine Ziphead

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    Aug 2, 2003
    Yeah, that's what I get on the no-sound channels. But channel 71 (no audio or video) is apparently a different issue, as both streams have PIDs.
     
  10. Feb 7, 2007 #250 of 275
    yanasina

    yanasina New Member

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    Jan 11, 2007
    I got cable cards monday and just went through my channels and there are eleven that I get no sound from. I have Comcast cable and have not called them yet.
     
  11. Feb 7, 2007 #251 of 275
    slimoli

    slimoli New Member

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    Jul 29, 2005

    Which channels do you have with no audio?
     
  12. Feb 8, 2007 #252 of 275
    TiVoJerry

    TiVoJerry 00-16 TiVo Employee

    1,511
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    Jul 26, 2005
    Alviso, CA
    If you have no audio or video, and the PCR & Video PIDs don't match, that's where we'd need to know the specifics per channel and who your provider, including local city)

    If you just have no audio and the audio PID is NOT AVAILABLE, it means your provider is not following CableCARD spec by not generating an AC3 track, reverting to MPEG2 instead. We are adding support for MPEG2 in this scenario in the next software release but the provider should still be notified so they can generate an AC3 track properly.

    If you have an audio PID but no audio, it means the provider is generating an AC3 track that does not contain audio. Even with the new software, the S3 will still detect the valid AC3 track. Your provider should be notified that it should generate audio for that blank track.
     
  13. Feb 8, 2007 #253 of 275
    Cloud

    Cloud New Member

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    Oct 16, 2003
    OK, I had no audio on 4 channels a few months ago... I just checked them again and I now have audio on every channel. They're all working now! I'm on Comcast here in the Burlington Vermont area.
     
  14. Feb 8, 2007 #254 of 275
    yanasina

    yanasina New Member

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    Jan 11, 2007
    I went through the channels and wrote down the numbers. What I have is video and no audio. I didn't check to see if I am not getting any channels I should be. I think they are the usual suspects plus a few more. (I also have a problem with Tivo UNchecking a few channels that are not giving program information. I have read on other posts about what seems to be the problem there. One of those I know is not listed on zap2it.com.) Before I do anything else, when I get time, I am going to reboot, redo guided setup and go through all the channels again to identify exactly what I am having problems with. Then I'll have to go back through this post and do the checking for PID and whatever that stuff is :rolleyes: Unfortunately, I don't have the hours in the day to do that right now; hopefully I can do it by next weekend at the latest.

    I'm a checkllist sort of gal, so at least now I can use TivoJerry's latest post to go through all this and see if i can identify what's up here.

    Channels without sound: Biography, Fox Movie, IFC, CNBC World, History, G4, Speed, Soccer, Fox Reality(not on my cable company handout of channels, but may have been added), Word, and a sports channel that is not in my package, but that I can see somehow.

    Ain't technology grand! (Well yes it is, but fiddling takes so much time)
     
  15. Feb 8, 2007 #255 of 275
    slimoli

    slimoli New Member

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    Jul 29, 2005
    Biography,IFC,History (International) are also in my list. IFC is the only channel that does have a PID and according to Jerry will not work even with the new software. I understand the "blank AC3 track" issue but I have already spoken to my cable company and they say they can't do anything. After the new software is installed, I will try to convince the cable company to at least change the blank AC3 to a valid MPEG2 track.
    They are working on this problem and they managed to fix 3 of my "no audio" channels: DIY,FUEL and FUSE ( they now have a valid AC3 track) but unfortunately not the ones I really care, like IFC.

    After several conversations with the chief engineer I can now say they have 3 different situations as far as the audio is concerned:

    -Most channels with BOTH Ac3 and MPEG tracks. No problem here.

    -Few channels with MPEG only track. Should be OK after the new S3 software . BIO and HISTI are some of those channels.

    -Few channels with AC3 and MPEG but the AC3 is mute. That's the case of my IFC and I hope I can convince the cableco to either send a valid AC3 or send only the MPEG.

    Here is why the cable company will never change everything to AC3: There are many old cable boxes which simply don't work with AC3 and they can't eliminate the MPEG. My cable company (Atlantic Broadband) bought an old cableco with thousands of legacy cable boxes.

    Sergio
     
  16. Feb 9, 2007 #256 of 275
    wmcbrine

    wmcbrine Ziphead

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    Aug 2, 2003
    Ah, yes... on my no video/no audio channel, I see:

    PCR PID: 1618
    Audio PID: 1616
    Video PID: 1617

    CNN Headline News
    Channel 71
    Verizon Fios TV (Washington Metro lineup)
    Laurel, MD 20707

    I hadn't noticed before, but all the other channels I checked match PCR and Video PIDs.
     
  17. Feb 9, 2007 #257 of 275
    generaltso

    generaltso Member

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    Nov 3, 2003
    Vermont
    Yup, Comcast in Vermont has finally switched the audio track on all the affected channels to AC3. Months of complaing has apparently paid off!
     
  18. dig_duggler

    dig_duggler losing enthusiasm

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    Sep 18, 2002
    Birmingham, AL
    Ack! I just discovered this is affected me after trying to watch Ninja Warrior. Where can this information be found (PIDs)? CableCard config screen?
     
  19. TiVoJerry

    TiVoJerry 00-16 TiVo Employee

    1,511
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    Jul 26, 2005
    Alviso, CA
    Tune to the affected channel and then go to TiVo Central> Messages & Settings> Account & System Information> Diagnostics.

    This screen contains information for each tuner. If the affected channel is not listed as the current channel tuned on the first page, scroll down to the info for the second tuner. Go down even further to see three entries:
    PCR PID
    Audio PID
    Video PID
     
  20. TiVoJerry

    TiVoJerry 00-16 TiVo Employee

    1,511
    0
    Jul 26, 2005
    Alviso, CA
    The software rollout to Series3 has begun.
     

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