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| Movies / Television Fifty-million channels and nothing is on. Maybe someone here knows? |
06-28-2009, 09:32 AM
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radio that receives digital tv?
Now that OTA TV signals have officially made the switch from analog to digital I was wondering if anyones knows of any radio in the works that will be manufactured to receive them??
Ive been asked from some coworkers who now can no longer listen to thier soaps while at work.
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06-28-2009, 09:43 AM
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Just as TV band radios exist (but as a small market) I would bet there will be new ones (but it will take a while until the receiver/tuner chips get cheap enough)
Or the market goes away and is replaced with Internet streaming to a phone or computer.
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07-03-2009, 11:47 PM
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Hopefully a radio like that comes out someday soon. Then it can be expected that portable tvs will be soon behind. I'd like to see a 6" or so LCD portable. Bring back porta-tv DXing.
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07-04-2009, 10:57 AM
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What is happening is leiu of radios that get TV sound is a new industry called mobile TV. Services are available in many areas to get TV on your cell phone and/or specialized hand-held devices. One system is using the old TV channel 55 around the USA to broadcast 8 channels digitally to hand-held units. It's digital so the pictures are "clear". Oh you want it for free? Not for a while.
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07-05-2009, 10:10 PM
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Quote:
Originally Posted by gmclam
. . . .One system is using the old TV channel 55 around the USA to broadcast 8 channels digitally to hand-held units. It's digital so the pictures are "clear". . . . ..
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Link?
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07-23-2009, 02:58 AM
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Gday, I had been thinking about trying something like that with digital tv and a analog scanner. I have got a old SD Set top box with a blown power supply that I thought may be possible to use the codec IC to "Decode" the Digital audio, I know this would have to also have a A-D / Codec IC / D-A type of circuit. I have not yet started because I am still researching this and do not know if Baseband (Discriminator) audio would be sufficiant or would need to have a 10.7 MHz output.
James.
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07-23-2009, 03:07 AM
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To receive over-the-air TV audio in the USA from a digital braodcast you need to do the following. My outline is by no means absolutely every step, but merely an overview.
- Tune to the correct frequency; which is a 6 MHz wide signal
- Demodulate the digital transport stream, which uses 8VSB
- Parse the stream to find the desired audio data
Note: keep in mind that a typical ATSC signal has PSIP data, guide data plus video & audio for multiple channels. You are not going to be able to just grab all the audio packets, you'll need to determine which sub-channel's packets you want.
- Convert the audio data into audio (digital to analog conversion)
- Optionally modulate the audio onto a frequency your scanner can tune to
There's no real way to send the signal to the scanner as an "IF" signal, other than perhaps remodulate it yourself because no current scanner can underestand 8VSB nor is it able to do most of the processing required.
Quote:
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I have not yet started because I am still researching this and do not know if Baseband (Discriminator) audio would be sufficiant or would need to have a 10.7 MHz output.
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We're not dealing with FM audio, so there is no discriminator involved (other than in your scanner). Using a 10.7 MHz output would only work if you remodulate the audio onto 10.7 MHz and you can tune that frequency on your scanner.
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Last edited by gmclam; 07-23-2009 at 03:11 AM..
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07-23-2009, 08:07 AM
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Quote:
Originally Posted by CLynch7
Hopefully a radio like that comes out someday soon. Then it can be expected that portable tvs will be soon behind. I'd like to see a 6" or so LCD portable. Bring back porta-tv DXing.
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7" Digital portables have been avaiable for a while now. I've had mine for 4 months and it works fine. Rat shack had them on sale for $129. They were back up to $179 for the least expensive last time I checked.
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07-23-2009, 10:34 AM
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i have a 5 in portable LCD tv that does ATSC and NTSC as well as having a composite A/V input. Payed something like $30 for it brand new.
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09-02-2009, 07:00 AM
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I've seen 2 different kinds for hooking to a usb drive one in a beginning of the year catalog and one at ratshack a few months ago Hauppauge® WinTV-HVR850 USB TV Tuner - RadioShack.com .
Includes portable antenna to receive digital TV while you travel
Works with both analog and digital television broadcasts
Dimensions 1x4x5 inches & 4 ounces
$79.99 for this one remove the video half, put it into a radio lol.
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11-01-2009, 01:12 AM
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I see a lot of ideas here, and experimentation is the name of the game to find out what works. If I had the time, I would take one of these TV boxes that the FCC or whoever gave the coupons out for, and try to wire the audio portion to a radio compatible with digital signal reception. Some receiver stages and components would have to be worked with or even completely replaced. I'm betting that someone somewhere would figure it out.
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11-01-2009, 05:50 AM
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Quote:
Originally Posted by KB9NLL
I've seen 2 different kinds for hooking to a usb drive one in a beginning of the year catalog and one at ratshack a few months ago Hauppauge® WinTV-HVR850 USB TV Tuner - RadioShack.com .
Includes portable antenna to receive digital TV while you travel
Works with both analog and digital television broadcasts
Dimensions 1x4x5 inches & 4 ounces
$79.99 for this one remove the video half, put it into a radio lol. |
Newegg has this for $54.99!
Newegg.com - Hauppauge WinTV-HVR-850 HDTV Adapter 1200 USB 2.0 Interface - TV Tuners & Video Devices
The reviews aren't exactly stellar, but the key seems to be having a good antenna. I have an internal PCI tuner card and I am very pleased with it. I bought a 1tb hard drive for $80 and now can record days worth of HD video on my PC.
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Last edited by scottaschultz; 11-01-2009 at 05:54 AM..
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11-01-2009, 09:07 AM
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Quote:
Originally Posted by KC9NCF
I see a lot of ideas here, and experimentation is the name of the game to find out what works. If I had the time, I would take one of these TV boxes that the FCC or whoever gave the coupons out for, and try to wire the audio portion to a radio compatible with digital signal reception. Some receiver stages and components would have to be worked with or even completely replaced. I'm betting that someone somewhere would figure it out.
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I haven't cracked mine open, but I am betting that the video and audio are all decoded in one chip.
Most of the boxes deliver baseband audio, so I don't know what you would be wiring it to besides an amplifier.
(Yes some are RF only out, but the ones with video and audio out were easy enough to find, that I found no reason not to get them.)
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