IP Costs? -----Original Message----- From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On Behalf Of Manfredi, Albert E Sent: Tuesday, December 03, 2013 5:41 PM To: opendtv@xxxxxxxxxxxxx Subject: [opendtv] Re: IBA Technical Review available online Ron Economos posted: > The link should be: http://tech.ebu.ch/docs/tech-i/ebu_tech-i_018.pdf Thanks, Ron. Very interesting articles. Why digital radio is taking so long is a really good question, ESPECIALLY in the US, where we actually have a clever system. No impact on spectrum, most radio broadcasters are already transmitting HD Radio (in our market, at least), so the only impact is to get receivers out there. (My answer is that it's all about money. E.g., GM would be much happier to sell Sirius/XM subscriptions to new car buyers, than to have them tune in to HD Radio for the one-time, slight additional cost of the radio.) IMO, Europe should also go to something like HD Radio (aka Ibiquity's scheme), or the German DRM system, in preference to DAB. Why? Because what more effective use can the 550-1620 KHz and 88-108 MHz frequency bands be put to? HD Radio is set up to operate in hybrid mode during the transition period, without taking up other frequency bands, so it seems an easy approach. DRM doesn't have a true hybrid mode, but it can operate in a similar way anyway, in AM and FM bands. DRM can use previous guard bands or spare channels, effectively duplicating what HD Radio does. DAB, on the other hand, needs high UHF and L Band, so switching off FM and AM to go to DAB means leaving these AM and FM bands free of signals. Bands **no one** is aching to use. As far as I've been able to decipher, the biggest technical concern with HD Radio is that it slightly degrades the FM signal? And it can't be used at night on the AM band, until analog AM goes off the air. Assuming these were real issues, and not just an excuses, if you're trying to end FM and AM transmissions, do these concerns really matter? Bert ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line. ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.