Pulling the HD signal from coaxial... - Blu-ray Forum

BigGeezy · 07-13-2008, 06:18 AM

I don't know how the cable boxes work internally, but when you order HD service from a cable/sat. company and their HD digital signal comes into your reciever and out through the HDMI in the back...what is going on between the input and output points? Is the HD signal being converted or is the frequency of the HD signals in the coaxial cable being relayed to the HDMI output in a way that allows the AV quality to show up in HD on the TV screen? Thanks in advance for anyone's knowledge on the issue...

JasonR · 07-13-2008, 06:22 AM

There is no conversion, it is HD when it gets there. The HDMI cable does nothing but provide connection, component will be about the same. One is analog, one is digital.

BigGeezy · 07-13-2008, 06:28 AM

Quote:

Originally Posted by JasonR

There is no conversion, it is HD when it gets there. The HDMI cable does nothing but provide connection, component will be about the same. One is analog, one is digital.

So if I have a satellite HD receiver box and I get an HD package, they will only provide one box for one TV. With that box I will run my HDMI to that TV, but the other LCD in my house I will have to hook it straight up to the back with coaxial as they do not provide a second HD reciever box for that TV. So is there a way to pass the signal through something transitory to go from coaxial input to HDMI output like on the satellite reciever box?

JasonR · 07-13-2008, 06:34 AM

If that TV has an internal HDTV decoder, you will not need anything else. Otherwise, you will need a box.

MistyMorn · 07-13-2008, 04:00 PM

If there is a connection, I'm not sure what it would be. My HDTV has built-in tuners but not decoders. Connecting the coaxial cable to the HDTV only pulls in the basic cable channels. The digital and HD channels do not come through.

JasonR · 07-13-2008, 04:15 PM

I am sorry, you are right. You can't even get to the digital channels without a box, at least that is the case with Charter. But, technically it would work though coax if you had a built in tuner. Take OTA as an example.

My_Two_Cents · 07-13-2008, 09:50 PM

Quote:

Originally Posted by BigGeezy

So if I have a satellite HD receiver box and I get an HD package, they will only provide one box for one TV. With that box I will run my HDMI to that TV, but the other LCD in my house I will have to hook it straight up to the back with coaxial as they do not provide a second HD reciever box for that TV. So is there a way to pass the signal through something transitory to go from coaxial input to HDMI output like on the satellite reciever box?

If you have satellite, you will not get anything on a second set without a box. At least, that is how it has always been with me when I had Sat in the past. Cable, though, will allow you to pick up the basic channels that your internal tuner can handle. Your set should also be able to pick up local HD channels though the coax alone (with cable). Mine does. You want to watch a second set with sat, you'll need to pay for another box or box fee.

If I'm mistaken, some please set me straight.

Kryptron · 07-13-2008, 09:58 PM

You can't get any HD thru coax with satellite. Even if your tv has a built in tuner. Think of it as if you already had an extra box, that doesn't mean you get all the channels, the box decodes the signal and gives you the channels you subscribe to the tv doesn't have a "decrypter/decoder/descrambler". The satellite box aka "Integrated receiver,decoder" is there to authorize what channels you pay for. With cable there is a cable card you can get for some tv's that allows you to receive the additional programing without the need to have a cable box but alot of tv's do not have a cable card slot.

BigGeezy · 07-13-2008, 10:31 PM

Quote:

Originally Posted by Kryptron

You can't get any HD thru coax with satellite. Even if your tv has a built in tuner. Think of it as if you already had an extra box, that doesn't mean you get all the channels, the box decodes the signal and gives you the channels you subscribe to the tv doesn't have a "decrypter/decoder/descrambler". The satellite box aka "Integrated receiver,decoder" is there to authorize what channels you pay for. With cable there is a cable card you can get for some tv's that allows you to receive the additional programing without the need to have a cable box but alot of tv's do not have a cable card slot.

So the sat reciever/box is taking the HD frequencies and through-putting them to the TV via my HDMI cable? And if that is the case, then on my second TV where there is no box it is just hooked up with coax, how come I can select an HD channel and I will be able to watch it, but even though the HD channel is on my LCD, it is not in HD (is this because the HD frequency is coming through coax and the coax circuitry is set up to only display SD?)

07-13-2008, 06:18 AM	#1
BigGeezy Member Member since:Nov 2007 Location:Fort Worth, TX	Pulling the HD signal from coaxial... I don't know how the cable boxes work internally, but when you order HD service from a cable/sat. company and their HD digital signal comes into your reciever and out through the HDMI in the back...what is going on between the input and output points? Is the HD signal being converted or is the frequency of the HD signals in the coaxial cable being relayed to the HDMI output in a way that allows the AV quality to show up in HD on the TV screen? Thanks in advance for anyone's knowledge on the issue...

07-13-2008, 06:34 AM	#4
JasonR Super Moderator Top contributor Member since:Nov 2007 Trading Score:12	If that TV has an internal HDTV decoder, you will not need anything else. Otherwise, you will need a box. Last edited by JasonR; 07-13-2008 at 06:39 AM.

07-13-2008, 09:58 PM	#8
Kryptron Expert Member Member since:Sep 2007 Location:Tampa Bay, FL Home Theater Gallery:21 4K collection:83 Blu-ray collection:450 Trading Score:4	You can't get any HD thru coax with satellite. Even if your tv has a built in tuner. Think of it as if you already had an extra box, that doesn't mean you get all the channels, the box decodes the signal and gives you the channels you subscribe to the tv doesn't have a "decrypter/decoder/descrambler". The satellite box aka "Integrated receiver,decoder" is there to authorize what channels you pay for. With cable there is a cable card you can get for some tv's that allows you to receive the additional programing without the need to have a cable box but alot of tv's do not have a cable card slot. Last edited by Kryptron; 07-13-2008 at 10:10 PM.

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07-13-2008, 06:22 AM	#2
JasonR Super Moderator Top contributor Member since:Nov 2007 Trading Score:12	There is no conversion, it is HD when it gets there. The HDMI cable does nothing but provide connection, component will be about the same. One is analog, one is digital.

07-13-2008, 04:00 PM	#5
MistyMorn Active Member Member since:Mar 2008 Location:North Carolina Blu-ray collection:76 Blu-ray reviews:18	If there is a connection, I'm not sure what it would be. My HDTV has built-in tuners but not decoders. Connecting the coaxial cable to the HDTV only pulls in the basic cable channels. The digital and HD channels do not come through.

07-13-2008, 04:15 PM	#6
JasonR Super Moderator Top contributor Member since:Nov 2007 Trading Score:12	I am sorry, you are right. You can't even get to the digital channels without a box, at least that is the case with Charter. But, technically it would work though coax if you had a built in tuner. Take OTA as an example.

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