The HD radio is a hybrid digital radio.. It receives AM, FM, and HD signals. It received both analog and digital signals. The AM digital sounds more like the present FM and the FM is more like a CD sound. The HD sound is pure digital and the sound is great. If there is any type of defect in a CD playing, it will be recognized immediately.
Few people are familiar with the HD radio today but the radio broadcast stations are rapidly changing to the HD format. The hardware cost is still very high compared to a normal AM/FM radio. The cost varies from $100.00 to $600.00 and up. I would expect the cost to be greatly reduced when these are in mass production.
The broadcast stations love this format because they can get many more stations broadcasting on the same bandwidth. The signals are bundled together and compressed. The AM and FM analog signal bundled with the digital signals of AM, FM, HD1 and HD2 etc. The digital signals are compressed. The new HD radio will simply receive the signal for the radio settings. If the digital AM is playing and it looses its digital signal, it will simply revert to the AM analog signal.
The government has forced Television stations to broadcast in all digital in the near future. Customers with the old analog TV's will be required to either buy a new digital TV or obtain a set top box to convert the digital signal back to analog. The government is not forcing this on radio but they are proceeding on their own because this is the greatest improvement in radio sound since the introduction of FM years ago.
The patent for HD technology is held by iBiquity Digital Corp. and all stations will pay a royalty fee for the technology. I do not know what this license fee is but it is not holding back the development of this new sound. Few people are familiar with this technology but they will be hearing a lot about this in the next few months.
Will the public cancel their satellite subscriptions and turn off their MP3's and iphones etc for this new sound? This should go with lightening speed when the prices fall and we have hand held and pocket radios. Now they are only available in table top designs and automobile installations. This is all I have seen.
The NPR stations and stations in larger and medium size cities are changing fast so that by 2008 I would expect many stations broadcasting in HD format. The critics say that it has not been proven and the technology may not work. Supporters say that by improving the sound to digital, everyone wins. The technology has been proven by now and we will see the improvements in our homes soon. The United states and the world is in the middle of the digital revolution and digital radio is simply a small part of it.
Receiver With Hd Radio
The original definition was hybrid digital. Some have said that it is now a brand name for the inventing company ( iBiquity Digital Corp.). The common use seems to be simply HD radio and defines the digital radio that captures the HD signals. The use seems to be more of a brand than anything else.
The radio stations like it because they can get many more broadcasting stations. This is part of the digital revolution that is occurring in the world today. The digital signal is compressed and bundled with the following signals: AM , FM, HD, HD2. The AM and FM signals are analog and digital. These are broadcast as a bundle but it requires the special HD radio to receive the digital and HD signals.
When or if the digital signal is lost, the radio reverts back to the analog signal. The AM digital signal loses its static and buzz and produces a sound that is very much improved over the analog signal. The FM digital signal produces a sound that is very close to CD quality. The question most people ask is are the people willing to pay the high price for a HD radio? These cost between $100 and $600 and are made for the table top or installed in a car.
The public likes their mp3's and small portable radios. One can get a portable AM/FM for $15. The cost should come down if many people get the HD radios. Many or most NPR stations are going to the HD broadcast format. Most of the large stations are also changing to the new format. The cost is reasonable to convert to this format and the user fees to iBiquity must be reasonable as most stations are changing.
iBiquity might have improved the roll out by forgoing any fees until the usage was very high. The industry must have confidence in the system though since so many are changing to this format. The critics say that the technology has not been proven and may not work. Supporters say how can one loose by improving the sound to digital everyone wins.
This is the most improvement in radio sound since the introduction of FM stereo nearly fifty years ago. The government has forced TV stations to go digital. This also allows for high definition television for even better reception.. The government is not forcing radio to go digital but they are doing it on their own to improve reception. My opinion is that the hardware receivers will need many improvements before everyone is going to flock to the electronics store to buy their own. The size and features along with the price needs improving.
The technology for HD radio is here and looks great on paper. Will people turn off their satellite subscription and mp3's and Iphones to go to HD radio? It could be a slow process but when it really catches on, it could take off.. The world is moving much faster in the digital world than it did in the slow days of AM and FM.
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