[linux-dvb] Fusion HDTV5 / Airstar HD5000 features, support?
mkrufky at linuxtv.org
Wed Oct 12 23:24:28 CEST 2005
Matto Marjanovic wrote:
> I'm trying to get a handle on weighing the options for a new ATSC tuner
> card; I've looked looked through the list archives and haven't quite
> found an answer to these questions. (Perhaps, if they get answered
> here, the answers could find their way into the ATSC_cards page in the
> linuxtv wiki? Can anyone add stuff to the wiki? If so, I'd be happy
> to do it.)
Anybody can add to the wiki... Please, feel free. I enjoy writing code
better than documentation. (dont we all) .... SO, go for it!
> The DVICO Fusion HDTV5 Gold, HDTV5 Lite, and Airstar HD5000 all appear
> to work under linux now - fantastic! But why use one over the other?
> Here are some questions that come to mind:
I don't know as much about the Airstar HD5000, but I can tell you that
it is not yet supported without Tyler's patch.
You neglected to mention FusionHDTV3 cards... These use a slightly older
tuner/frontend combo, but they work well too, and have the same
capabilities as the FusionHDTV5 cards.
> o Is a dual-card/dual-tuner setup possible with any of these?
Don't know about airstar, but it is working well for me with the
FusionHDTV cards. Airstar *should* work also.
> o Do the linux drivers support recording from analog broadcast?
Airstar does not support analog. *ALL* of the ATSC/NTSC FusionHDTV5 and
FusionHDTV3 cards DO support this.
> o Do the linux drivers support recording from composite/s-video input?
> (I believe only the HDTV5 Gold has such an input, right?)
FusionHDTV3 Gold-T, FusionHDTV5 Gold and FusionHDTV5 Lite all have
s-video, composite, NTSC and ATSC.
I'm not sure if the GPIO for FusionHDTV3 Gold-Q is correctly programmed
for s-video / composite. Mac Michaels has that card, and I do not know
if he has tested those inputs.
> o What kind of closed-caption support do these cards have?
Closed-caption is not yet supported in the cx88 driver. So, if you need
this support, I'd recommend the FusionHDTV5 Lite.
> o The HD5000 can do TS stream demultiplexing in hardware, correct?
> What kind of impact does this have on its performance (i.e. what
> kind of difference does this make, and when)?
IDK, probably less CPU strain...
> o [A non-linux related question, for the heck of it:]
> I believe the RF frontend on all these cards is the same; do these
> three cards work equally well in pulling in an HDTV signal, in
> multipath rejection, etc? (How about analog broadcast signals?)
The following does NOT answer your question, but:
AFAIK, airstar doesn't receive analog broadcasts at all.
If this question applies to linux, then I would say:
cx88 driver is less mature than bttv, and bttv deals with analog
television broadcasts *much* better than the cx88 driver.
Also, in my experience, I have gotten more of a steady stream from the
bt878-based FusionHDTV5 Lite as opposed to the cx88-based Gold models.
So, overall, the FusionHDTV5 Lite is my favorite among these cards, but
I have not yet tried the AirStar 5000.
Hope this helps,
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