RE: [digitalradio] Digital Radio - Well Broadcast
And WHY would you go digital on a car radio? How many HUNDREDS OF MILLIONS of radios would have to be replaced? The shift to the new TV format in Feb. 2009 is only going to work because so many are on CABLE --- Barry Garratt [EMAIL PROTECTED] wrote: IBOC is a method whereby both analog and digital signals are transmitted on the same frequency. Additional digital subcarriers are carried on the normal AM or FM analog signal. They extend beyond the normal channel bandwidth though so there is an increased chance of adjacent channel interference. I think the plan in the future is to eliminate the analog portion and have all stations strictly digital. _ From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of John Becker, WØJAB Sent: Monday, November 12, 2007 5:25 PM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] Digital Radio - Well Broadcast This has been going on for over 25 years that I know of. But I don't think it was digital. AM and FM radio had a service for the blind that was a sub carrier. Sounds very close to it. At 06:29 PM 11/12/2007, you wrote: In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to add digitial audio to existing AM and FM stations. In broadcast radio, there isn't the luxury of unused channels that allow every station to have one analog and one digital transmitter. I haven't seen any terrestrial digital radio receivers in stores yet. Be a better sports nut! Let your teams follow you with Yahoo Mobile. Try it now. http://mobile.yahoo.com/sports;_ylt=At9_qDKvtAbMuh1G1SQtBI7ntAcJ
Re: [digitalradio] Digital Radio - Well Broadcast
In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to add digitial audio to existing AM and FM stations. In broadcast radio, there isn't the luxury of unused channels that allow every station to have one analog and one digital transmitter. I haven't seen any terrestrial digital radio receivers in stores yet. 73, John KD6OZH - Original Message - From: Kevin Natalia To: digitalradio@yahoogroups.com Sent: Monday, November 12, 2007 20:13 UTC Subject: [digitalradio] Digital Radio - Well Broadcast Hi All, Most likely a little off topic, but it is still to do with Digital Radio. With the advent of Digital TV, I am surprised that there has not been more work done on the Broadcast side for normal radio. I would of thought that this would of been easier to implement and install, don't have to send satellites up, could all be done on the ground. Maybe I am wrong, and this is already here, just that I don't see too much mentioned about it. Maybe this group can help shed some light on it. Imagine the audio quality, being able to listen to the station you are on for the whole trip, not having to change to a different station when you get out of range. I do know there is some form of satellite radio in North America, but I have not heard too many good words about it :( So, is there anything being developed, or are we still having to use old analog AM FM. Regards Kevin, ZL1KFM. Get Skype and call me for free. sparc_nz Description: Binary data
Re: [digitalradio] Digital Radio - Well Broadcast
There are several broadcast stations in my local area that are digital, one local shop sells receivers. The content is fairly poor at the moment, each stations carries their existing FM or medium wave stations and then the extra channels are a syndicated radio service offering themes like Jazz, rock, etc. pretty bland stuff that is exactly the same in each market. Satellite service in North Americanis quite goo, in my opinion. The digital signal is of good quality and reception with a small antenna is very good across the continent. Programming is quite varied , my provider gives me BBC World Service, CBC, many really good alternative music channels. Andy. On Nov 12, 2007 7:29 PM, John B. Stephensen [EMAIL PROTECTED] wrote: In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to add digitial audio to existing AM and FM stations. In broadcast radio, there isn't the luxury of unused channels that allow every station to have one analog and one digital transmitter. I haven't seen any terrestrial digital radio receivers in stores yet. 73, John KD6OZH - Original Message - From: Kevin Natalia To: digitalradio@yahoogroups.com Sent: Monday, November 12, 2007 20:13 UTC Subject: [digitalradio] Digital Radio - Well Broadcast Hi All, Most likely a little off topic, but it is still to do with Digital Radio. With the advent of Digital TV, I am surprised that there has not been more work done on the Broadcast side for normal radio. I would of thought that this would of been easier to implement and install, don't have to send satellites up, could all be done on the ground. Maybe I am wrong, and this is already here, just that I don't see too much mentioned about it. Maybe this group can help shed some light on it. Imagine the audio quality, being able to listen to the station you are on for the whole trip, not having to change to a different station when you get out of range. I do know there is some form of satellite radio in North America, but I have not heard too many good words about it :( So, is there anything being developed, or are we still having to use old analog AM FM. Regards Kevin, ZL1KFM. Get Skype and call me for free. -- Andy K3UK www.obriensweb.com (QSL via N2RJ)
Re: [digitalradio] Digital Radio - Well Broadcast
This has been going on for over 25 years that I know of. But I don't think it was digital. AM and FM radio had a service for the blind that was a sub carrier. Sounds very close to it. At 06:29 PM 11/12/2007, you wrote: In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to add digitial audio to existing AM and FM stations. In broadcast radio, there isn't the luxury of unused channels that allow every station to have one analog and one digital transmitter. I haven't seen any terrestrial digital radio receivers in stores yet.
RE: [digitalradio] Digital Radio - Well Broadcast
IBOC is a method whereby both analog and digital signals are transmitted on the same frequency. Additional digital subcarriers are carried on the normal AM or FM analog signal. They extend beyond the normal channel bandwidth though so there is an increased chance of adjacent channel interference. I think the plan in the future is to eliminate the analog portion and have all stations strictly digital. _ From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of John Becker, WØJAB Sent: Monday, November 12, 2007 5:25 PM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] Digital Radio - Well Broadcast This has been going on for over 25 years that I know of. But I don't think it was digital. AM and FM radio had a service for the blind that was a sub carrier. Sounds very close to it. At 06:29 PM 11/12/2007, you wrote: In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to add digitial audio to existing AM and FM stations. In broadcast radio, there isn't the luxury of unused channels that allow every station to have one analog and one digital transmitter. I haven't seen any terrestrial digital radio receivers in stores yet.
Re: [digitalradio] Digital Radio - Well Broadcast
The SCA (Subsidiary Communications Authority) was a sub-carrier quite a distance from the main carrier and was not detected by the standard FM receiver. The audio quality was very low. I think the maximum was only 8000 Hz or something relatively modest but worked well for speech. The IBOC (In Band-On Channel) system is used for the HD-AM transmissions which simulcast analog and digital. There are problems. On Oct, some of the ABC Radio affiliates were shutting off their IBOC transmissions at night due to adjacent channel interference to other stations and they felt the performance was as good as they had initially thought. I don't think many consumers are buying the receivers so you also have a chicken and egg situation. IBOC is also used on FM (88 to 108 MHz), and I would expect it to work better than on the relatively narrow 10 kHz AM BCB. If you have been following the press on DRM, it has been somewhat unfavorable since the quality improvement is not always that good either due to multipath issues. It seems hard to believe, but there was some claims that Sangean will discontinue DRM for their SW receiver. I could not confirm this out from their web site, but I also could not find DRM SW receivers either. The DAB transmissions from satellite is quite good and gives you over 100 channels, but you do have to pay a subscription fee. 73, Rick, KV9U John Becker, WØJAB wrote: This has been going on for over 25 years that I know of. But I don't think it was digital. AM and FM radio had a service for the blind that was a sub carrier. Sounds very close to it. At 06:29 PM 11/12/2007, you wrote: In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to add digitial audio to existing AM and FM stations. In broadcast radio, there isn't the luxury of unused channels that allow every station to have one analog and one digital transmitter. I haven't seen any terrestrial digital radio receivers in stores yet. Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php Yahoo! Groups Links
