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MPEG 2 or MPEG 4. Old amberlight TV

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    Astral Giant

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    Recently tried to retune a friends Philips 37 PF 9731/10 tv. It finds 123 channels but only stores 40. Had the following conversation with Philips
    Welcome to Philips, you are now chatting with Michael 13:45:33
    Michael: Hello. Welcome to Philips TV support. 13:46:00
    Michael: Are you using any external digi box to watch the TV or it's a standard freeview ? 13:46:17
    Richard: built in freeview 13:46:39
    Michael: Okay. In this case, I am afraid, that the only solution is to buy an external digi box compatible with the new signal after the switchover 13:47:51
    Michael: Your TV has got a standard digital tuner built in, capable of getting MPEG-2 13:48:16
    Richard: Why? 13:48:19
    Michael: New signal is MPEG-4 13:48:23
    Richard: The tv finds 123 channels. why does it not store them? 13:49:48
    Michael: Because it is not capable of storing the channels broadcasted in MPEG-4 properly 13:50:25
    Michael: To be honest with you, it is even a goo thing, that it finds channels at all 13:50:48
    Michael: Although without an external freeview box capable of getting the new signal, it will not be able to store them permanently 13:51:21
    Richard: It was £2400 13:52:08
    Richard: Is this tv capable of storing 123 MPEG-2 channels? 13:53:32
    Michael: Yes, but not MPEG-4. 13:54:10
    Michael: MPEG-2 is not used any more for some time now. 13:54:39
    Richard: After a very recent retune previously stored channels have gone. why could it store them three days ago but not now? 13:55:28
    Michael: Maybe in your area they have cut off the old the old signal. 13:57:36
    Michael: All in all, the TV will not store the channels properly. 13:57:48
    Richard: How can I find out What the channels are broadcast in? 14:00:56
    Michael: Please, contact the switchover people to confirm that, if you do not believe me. 14:02:35

    I also have a 2001 humax freeview and 2008 PVR and a Philips DTR200/05. All are MPEG-2 and are working fine. Its a neighbors tv connected to the sane communal aerial as mine.
    Is the MPEG-4 reason from philips right?

    | Sun 13 Oct 2013 9:44:38 #1 |
  2. grahamlthompson

    grahamlthompson

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    SD Freeview and Satellite use mpeg2 video compression. HD use a modern version of mpeg4 H264/AVC. Pretty well all HD tv's have mpeg4 capable tuners. The issue is that Freeview in the UK use a different modulation for the HD channels. SD uses DVB-T and HD uses DVB-T2

    | Sun 13 Oct 2013 10:38:54 #2 |
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    Astral Giant

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    The TV is from 2006 and has a HD ready sticker on it so is presumably not HD. None of the above mentioned freeview boxes are HD but are working fine. The tv is failing to store more than 40 SD channels.

    | Sun 13 Oct 2013 11:19:55 #3 |
  4. grahamlthompson

    grahamlthompson

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    Astral Giant - 27 minutes ago  » 
    The TV is from 2006 and has a HD ready sticker on it so is presumably not HD. None of the above mentioned freeview boxes are HD but are working fine. The tv is failing to store more than 40 SD channels.

    Sounds like a software issue with the TV. One thing is certain mpeg4 is a complete red herring. The TV tuner spec should be in the TV manual.

    | Sun 13 Oct 2013 11:49:05 #4 |
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    Astral Giant

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    I tried the manual but could not find the specification. I had a feeling the information was wrong. Back to philips. Thanks.

    | Sun 13 Oct 2013 12:12:14 #5 |
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    Astral Giant

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    Just found the spec in a leaflet. TV is DVB-T.

    | Sun 13 Oct 2013 12:21:11 #6 |
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    damian

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    I'd question where it's finding 123 channels from, I have 42 SD channels stored, although I have deleted some.

    How many channels do you get on your 2001 Humax freeview?

    There is a software update for this TV from 2008 on the philips website, I'd update this software first, factory reset it and set up again.

    If after updating/resetting/retuning you can still only get 40 channels stored and you can get more on your own Humax freeview then the TV has to be faulty.
    I think the choice then has to be whether you can find and save 40 channels you want or get a set top box

    | Mon 14 Oct 2013 7:25:25 #7 |
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    Astral Giant

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    The search states 123 channels including radio. Had a previous problem with the philips freeview box only being able to store 100 channels. Will check later but there are over 100 channels out there. I don't know what all these channels are but some are missing. As an example the philips TV does not find or store the BBC childrens channels which the other freeview boxes find and store. Before retuning these could be watched on this TV.

    | Mon 14 Oct 2013 8:10:59 #8 |
  9. REPASSAC

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    I would think that the TV is picking up signals from multiple transmitters. Also I would check that the missing channels were broadcasting when you tuned.

    Is there a way you can manually tune?

    | Mon 14 Oct 2013 10:26:53 #9 |
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    Astral Giant

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    Old Humax freeview and newer pvr both find and store 123 channels. 99 tv and 24 radio. Some are not available such as BT sport but are visible and stored. The Philips tv finds 123 channels but does not show them in the guide or store them. The reception and available channels are the same. Three noticeably missing channels are from Childrens BBC. These are freely available not subscription and should be stored by the tv.
    I've contacted Philips again and will wait for their response.

    | Mon 14 Oct 2013 14:14:36 #10 |

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