Digisender (Again!)

azzeretti

Search is down at the moment, otherwise I would have used it!

Can anyone recommend a decent Digisender? I have plenty of wifi in the house and cordless phones so anyone on it's own frequency would be great. I can't use cable for various reasons.

Ta.

snaps

Well you've already mentioned the best "Video sender" a Digi sender. MOst do the same thing though and even the cheap ones in Aldi/Lidl work fine, but you'll have fun with it when the microwave is switched on and also the WIFI will affect it with a clicking noise present in the video senders audio. I seem to have mine working fine without interfearence from wifi (Changing wifi channel) but the Microwave is to strong, including the neighbours as well.

rlogue

From bitter experience I would not touch any digisender - they are wholly unreliable!

A better solution would be video/audio over CAT5 cable. Virtually no signal lossm albeit more expensive than a digisender.

Failing that I get excellent results from using DVBViewer as a streaming service over my wireless network at home. The downside is that DVBViewer will of course work well with FTA DTT and Satellite but not with any pay channels (i.e. Sky).

azzeretti

rlogue wrote: »

From bitter experience I would not touch any digisender - they are wholly unreliable!

A better solution would be video/audio over CAT5 cable. Virtually no signal lossm albeit more expensive than a digisender.

Failing that I get excellent results from using DVBViewer as a streaming service over my wireless network at home. The downside is that DVBViewer will of course work well with FTA DTT and Satellite but not with any pay channels (i.e. Sky).

Interesting. Tell me a little more about the Ethernet solution? How exactly does that work. Is there some device at each end to convert the Scart/HDMI signal and then back again? Any idea what type of bandwith it requires? Would it run over a poweline adaptor?

fat-tony

azzeretti wrote: »

Interesting. Tell me a little more about the Ethernet solution? How exactly does that work. Is there some device at each end to convert the Scart/HDMI signal and then back again? Any idea what type of bandwith it requires? Would it run over a poweline adaptor?

It's not an ethernet solution. Just uses CAT5 cable and baluns to transfer the video and audio signals.

azzeretti

fat-tony wrote: »

It's not an ethernet solution. Just uses CAT5 cable and baluns to transfer the video and audio signals.

OK. TBH, a bit of a pointless post really. Mostly, the term "CAT5 cable" is interchangeable with "Ethernet cable" regardless of the actual standard that is Ethernet and it doesn't really address my question.

Anyway -> google better be kind.

fat-tony

azzeretti wrote: »

OK. TBH, a bit of a pointless post really. Mostly, the term "CAT5 cable" is interchangeable with "Ethernet cable" regardless of the actual standard that is Ethernet and it doesn't really address my question.

Anyway -> google better be kind.

Ethernet is a transmission protocol. CAT5 is a type of cable, used for lots of things beside ethernet;) The previous poster never mentioned ethernet, you just inferred it.

The senders use baluns (transformers) to carry video and audio signals from the SCART , composite or component connectors of the sending device and transfer the signal onto separate pairs of the CAT5 / CAT6 or other structured cabling. At the receive end a similar device connects the cabling back to the TV or whatever. Ok?

azzeretti

fat-tony wrote: »

Ethernet is a transmission protocol. CAT5 is a type of cable, used for lots of things beside ethernet;) The previous poster never mentioned ethernet, you just inferred it.

The senders use baluns (transformers) to carry video and audio signals from the SCART , composite or component connectors of the sending device and transfer the signal onto separate pairs of the CAT5 / CAT6 or other structured cabling. At the receive end a similar device connects the cabling back to the TV or whatever. Ok?

Um, I really don't want to get into this, but I have never, ever heard Ethernet being referred to as a Protocol. What it is, is a "conformed to" standard for Layer 1 of the OSI model. Tranmissions protocols, as you say, take place higher up the OSI layer, typically Layer2 or Layer3 although application level protocols could also be argured here too. CAT5 is generally used on ethernet networks, hence the general acceptance of interchangeability.

Personally, anytime I have ever referred to, or anyone else for that matter, ethernet it is in relation to a physical connection. That is, an ethernet cable or ethernet card etc.

My inital point was, you didn't answer my question, and you still haven't. Not sure why you felt the need to try and point out a potential flaw in my post.

fat-tony

At the huge risk of derailing this entire thread:

I was using the term ethernet in the sense of the definition of ethernet in the OSI model - ie I was trying to differentiate between the digital data and analogue domains. Ethernet itself is very much a transmission protocol at the data link layer (layer 2 of the OSI model) in that the frames which themselves encapsulate IP, TCP, UDP data in higher levels are termed "ethernet frames".
Long before CAT5 or CAT6 cabling came along, ethernet was carried on coaxial cable.

The use of CAT5 cabling to carry video and audio signals in the context referred to in the earlier post by rlogue was merely to provide a simpler way to route analogue signals around the home where such cabling was already in place. It's a point-to-point solution (a longer piece of wire if you like) and has no connection with the transfer of digital data.

My initial brief post was to provide you with a snippet of info so you could research the use of baluns and CAT5 cable, rather than continue to assume it was some form of analogue to digital conversion.

azzeretti

fat-tony wrote: »

At the huge risk of derailing this entire thread:

I was using the term ethernet in the sense of the definition of ethernet in the OSI model - ie I was trying to differentiate between the digital data and analogue domains. Ethernet itself is very much a transmission protocol at the data link layer (layer 2 of the OSI model) in that the frames which themselves encapsulate IP, TCP, UDP data in higher levels are termed "ethernet frames".
Long before CAT5 or CAT6 cabling came along, ethernet was carried on coaxial cable.

The use of CAT5 cabling to carry video and audio signals in the context referred to in the earlier post by rlogue was merely to provide a simpler way to route analogue signals around the home where such cabling was already in place. It's a point-to-point solution (a longer piece of wire if you like) and has no connection with the transfer of digital data.

My initial brief post was to provide you with a snippet of info so you could research the use of baluns and CAT5 cable, rather than continue to assume it was some form of analogue to digital conversion.

Bloody hell!!! FYI, ethernet is part of both Layer 1 and Layer 2 of the OSI model. Seriously, I don't want to get into it, I just wanted to know about passing video over CAT5. My CCNP is up for renewal in May....if it turns out I have forgotten the last 15 years of my working life, I might PM you for some more information. ;-)

fat-tony

No problem

John mac

azzeretti wrote: »

Interesting. Tell me a little more about the Ethernet solution? How exactly does that work. Is there some device at each end to convert the Scart/HDMI signal and then back again? Any idea what type of bandwith it requires? Would it run over a poweline adaptor?

http://www.amazon.co.uk/CA-HDMI-AT-HDMI-CAT5-TRANSMITTER/dp/B001OBRFQG/ref=sr_1_2?ie=UTF8&s=miscellaneous&qid=1254525443&sr=8-2
one of these ?



(runs for cover:D)

.

bk

azzeretti you are correct about OSI and ethernet, but you jumped to a completely incorrect assumption here.

rlogue is talking about a technology that is becoming increasingly common in the AV arena. Cat5e or Cat6 cables are used as simple point to point copper links to carry encrypted HDMI packets between baluns. These baluns simply take the HDMI signal in one end, send it over the Cat5e copper and convert it back to HDMI on the other end.

Ethernet is not used anywhere in this setup, instead HDMI based protocols are used. The cat5e cables have to be dedicated point to point links, they cannot carry ethernet at the same time.

Nice picture here: http://lib.store.yahoo.net/lib/videoware/extcat5.jpg

BTW Cat5e can also be used for other things, I'm sure you are aware that it can also be used to carry a standard telephone line, again no ethernet involved. And some people have been using it as speaker cables in AV setups.

BBTW there is one company who have been trying HDMI over ethernet, called Just Add Power, looks very interesting, but an immature technology.

BBBTW No, these baluns won't work over homeplug gear, again this isn't ethernet.