Re: Nova-T 500 Dual DVB-T and h.264

[Lou Otway <lotway@nildram.co.uk>]

Eduard Huguet wrote:
> 2009/9/10 Lou Otway <lotway@nildram.co.uk>:
>> Eduard Huguet wrote:
>>> 2009/9/10 Lou Otway <lotway@nildram.co.uk>:
>>>> Eduard Huguet wrote:
>>>>> Lou Otway <lotway <at> nildram.co.uk> writes:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> Does anyone have experience of using the Hauppuage Nova-T 500 with
>>>>>> DVB-T
>>>>>> broadcasts with h.264 and AAC audio?
>>>>>>
>>>>>> DTT in New Zealand uses these formats and I'm seeing poor performance
>>>>>> from the Nova-T card. My thinking is that it was probably not conceived
>>>>>> for
>>>>>> dealing with dual h264 streams.
>>>>>>
>>>>>> Has the PCIe HVR-2200 been tested with dual h.264? I was wondering if
>>>>>> this card might have better performance.
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Lou
>>>>> Hi,    AFAIK the card just tunes to the desired frequency, applies
>>>>> configured
>>>>> filters (to select the desired station through its PID number), and
>>>>> handles the
>>>>> received transport stream to the calling application. It's up to the
>>>>> lastest to
>>>>> properly decode it. Check that the software you are using is properly
>>>>> capable of
>>>>> decoding this kind of content.
>>>>>
>>>>> Best regards,  Eduard Huguet
>>>> Hi,
>>>>
>>>> the problem isn't to do with playback as I have another type of adapter
>>>> card
>>>> that creates a TS, from the same mux, that is played back with no
>>>> problem.
>>>>
>>>> It seems that the problem only happens when using the Nova-T card.
>>>>
>>>> DTT in NZ has services with 1080i video format, I'm not sure that there
>>>> are
>>>> many other places in the world where 1080i h.264 content is broadcast
>>>> using
>>>> DVB-T, hence I was thinking that this combination may not have been well
>>>> tested.
>>>>
>>>> Thanks,
>>>>
>>>> Lou
>>>>
>>> I don't know how this it works in NZ. Here in Spain there is at least
>>> one station (TVC's 3HD) emitting HD content through TDT, and it works
>>> flawlessly with a Nova-T 500 (as I have one). I'm not sure if contents
>>> are 1080 or 720, though.
>>>
>>> There were some problems watching these channels through MythTV, but
>>> they were definitely decoding related. With current MythTV trunk they
>>> are fine.
>>>
>>> Anyway, as I said before, theoretically a DVB card doesn't know what
>>> kind of streams contains the signal it tunes. Decoding & parsing is
>>> handled by the app.
>>>
>>> Best regards,
>>>  Eduard Huguet
>>> --
>> I'm not using MythTV or any other type of Media playing application.
>>
>> In any case, I see very different performance between the two different
>> types of card, when presented with the same input.
>>
>> I'll gather some more data, if I can draw any new conclusions I'll update
>> the list.
>>
>> Best,
>>
>> Lou
>>
>>
>>
> 
> Maybe it's a problem of tuner sensibility. Is the low noise amplifier
> (LNA) activated for the Nova-T card?
> regards
>   Eduard
> --

That's something I hadn't considered. I'll check but I thought that the 
LNA was only applicable to the Nova-TD 500 (which has 2xRF inputs)?

Does the Nova-T 500, with only a single RF input have the LNA?

Thanks,

Lou