Re: Is IBOC for real?
> I realize I'm showing my lack of technical expertise here,
> but here goes...
> Has anyone ben able to show, quantifiably, that IBOC FM
> sounds better than traditional analog FM. I have my doubts.
> Especially since the digital satellite broadcasts I've heard
> don't seem to sound as good as terrestrial FM. I'm just a
> bit suspicious. Maybe one of our more technically
> knowledgeable posters (Bruce, Jim) can enighten me. Thanks.
My question has always been - is radio "broken" and in need of a fix? A lot of listening, perhaps most of it, is in cars. The main "enemy" here is style, that dictates that good antennas of the past - like the 31 inch whip - are deemed "unstylish" and being replaced by poorer antennas embedded in windshields, etc. I recall this same nonsense in the 1960's, and the resulting drop in sensitivity made broadcasters howl in protest. No such howling now. I rented one of those cars a couple of months back. Picket fencing, dropouts, static on KLUV in areas where my car with the 31 inch whip antenna has a perfect signal. Is digital going to help? Maybe with some of it - but I bet there will be situations where the blend back to analog will reveal nothing but a complete dropout. Which will be more obvious than ever because it will go from perfect to no signal abruptly, then back to perfect. Mostly the fault of the poor antenna in the car.
So the "fix" is not IBOC - the "fix" is better receivers, with better antennas. There is no reason why every car radio shouldn't be as good as the classic home tuners of the 1970's. Integration, improving processes, etc. should make it possible to put diversity receivers in every car, with multiple gang front ends and a dozen IF stages. Car radios ought to be hanging onto signals for 150 miles with no problems - or able to hold on in downtown canyons in NYC with 100 stations on the FM dial. Technical solutions were known 35 years ago, and being implemented in expensive units then. Our knowledge has only increased since then, with diversity antennas and better ceramic filters. We should have IC's under a dollar each with true DX machines in them. We don't, because the focus has been IBOC with the "digital" catchword. Guess what? The real world is still analog, there will never be a digital FM transmitter because the very nature of radio waves is analog. Unless you count spark gap transmitters which were "on / off" and probably had harmonics up and down the spectrum. They were the first - and only - digital transmitters.
Don't get me started on the real problem - which is format related - or perhaps the loss of localism / DJ spontaneity - all of which is long since lost because of corporate rules / legal departments / pushes for uniformity and "professionalism", things that no listener asked for and have been forced on the industry.