Satellite radio systems are actually part of a large group of broadcasting media called digital multimedia broadcasting and DMB. This digital transmission system is used to transmit data to different receivers such as radio, television, mobile phone, Pda. As a method of using digital multimedia broadcasting, there are S-DMB broadcasting using satellite broadcasting and T-DMB using ground emitter. The complexity of the entire digital multimedia broadcasting field is huge. The development of all functions and characteristics de satellite radio and other forms of digital broadcasting, as it has generated huge interest and caused intense competition between the two major satellite radio stations, Sirius and XM radio , The ground emitters are spectacular to provide two major natures that are missing: quality and coverage. In the case of satellite radio, for example, the sound quality from satellite broadcasting is much higher than AM or FM broadcasting, as noise and transmission disturbance are eliminated.
Technical features of digital multimedia broadcasting - overview
Whether it shows TV, satellite radio or cell phone transmission, digital multimedia broadcasting is based on the Eureka 147 DAB standard. Digital television uses T-DMB made for transmission in frequency band III (VHF) and L (SHF). T-DMB is ETSI standard (TS 1027 and TS 1028).
T-DMB uses MPEG-4 part 10 (H264) for video and MPEG-4 part 3 BSAC or HE-AAC V2 for audio. Regarding satellite radios, there were several problems to be solved by major satellite radio stations. Satellite radio receivers must be on the satellite's line of sight to receive the transmission - and land-based devices with different landscaping objects blocking direct transmission are installed to eliminate the lack of direct satellite transmission it was done. Since the broader spectrum of broadcasting must be covered, digital multimedia broadcasting uses OFDM-4 DPSK adjustment, chip fragments of T-DMB receiver also reduce negative influence by MPEG-2 Shadow, color is , I send it with many digital mails now.
The future of digital multimedia broadcasting
The transition from the analog world to the digital world is clear in every field. Since digital multimedia broadcasting has developed so quickly, it happens between digital technology of the new era and classical analog, silent battle course, the transition from analog to completely digital age, audio cassette replaced by Cd , Compared to the method which was later replaced by Dvd. It happens at too many levels at the same time, however, the development of digital multimedia broadcasting will be slow. Digital television basically takes us to a new space which is a hybrid of normal television functions and Internet characteristics. Satellite radio also has proprietary rights of satellite radio and more programs are taking a huge leap forward. For moving events like MLB, there is discussion only on satellite radio that provides one of the first fatal strikes to terrestrial radio broadcasting. Digital data transmission is fast and accurate and the reality so far proves that satellites are used to facilitate broadcasting and reliability. It is making a backup on proprietary artificial satellites with most digital multimedia broadcast companies and it is poor exchange on orbit. We will broadcast the development as a next step recommended for other benefits digital multimedia broadcasting. From the consumer's point of view, the choice of the quality and interactivity of digital TV or satellite radio broadcasting is an important feature. Most digital multimedia broadcasting channels and technology are still complicated and sometimes expensive, but the evolution of digital broadcast seems to stay here.
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Basics of satellite radio
Broadcasting digital radios via satellites is not new, but this is a concept of business that has been with us for several years. The program is as part of the first satellite radio, a digital audio channel provided by the cooking network as a company. A breakthrough in satellite radio popularity, however, just recently happened when technology became more tolerant. Satellite radio was very rare in moving places such as boats and cars. This was a strong suppression that kept the satellite radio quite unknown by the public. However, today it is possible to receive digital audio satellite broadcasts using a small antenna like gps. This greatly enhanced the possibilities of satellite radio systems and more car owners began to consider satellite radios as a good source of music and news.
The birth of a satellite radio in the United States
When the US Federal Communications Commission (FCC) assigned the spectrum of the "S" band (2.3 GHz) for the broadcast of digital radio services in 1992, no one would expect the system to use digital audio radio service It is possible to consult about what DARS is doing but licensed digital company was the radio wave of digital broadcasting in 1997. These two American mobile radio (currently - XM satellite radio, CD radio (now Sirius - The Institute Satellite Radio) The fact that satellite radio is nationwide makes it a very attractive medium channel for commercial and non-profit organizations.The two companies, which began developing satellite radio, The possibility was great because it was not restricted by the business operator.
Advantages of using satellite radio
Here are the most remarkable advantages of having some satellite radio systems:
* No more geographical limitations - Since radio programs are broadcast via satellite, you switch radio stations whenever you leave a particular coverage area
* Digital quality of satellite radio has some amazing advantages on its own. There is no noise disturbance conventionally used for FM and AM broadcasting. Transmission - concerning broadcast quality in valuable places to accept satellite radio waves.
* Analog radio stations are digital satellite radios for broadcasting sound.
* Both XM Radio and Sirius Radio can be picked up in all US territories and also available in parts of Canada and Mexico.
Satellite radio technology
Each of the major satellite radio services uses its own device to broadcast signals to customers. Competition is hard and customers have to choose "side" to contribute from satellite radio broadcasting. You must select your preferred company and purchase enough receivers for that particular company. XM Radio and Sirius Radio both give customers different ways to receive their service. The field where most competition is done is negotiation with a major automobile manufacturer. There is a deal with the automotive industry giant to provide both services to XM Radio and Sirius Radio, and any device in car imitates to produce. Other partnerships were created by audio equipment makers. Satellite Radio The most recent impact of the universe was caused by the production of satellite radio receivers such as portable MP3 players.
Future development of satellite radio
One of the main problems of satellite radio was addressed by the main satellite radio station. In order to eliminate the lack of direct satellite transmission, in order to solve this mobile satellite, especially when different landscaping objects blocked direct transmission, because you need to be on the satellite's line of sight to receive the transmission , Land equipment installed. Another interesting aspect is the traditional radio station from the standpoint of service management in related satellite radio and. Instead of broadcasting commercials they charge subscription fees. For many people this is actually the best option and almost 100% content broadcasting (music and tokushi in most cases, satellite radio monthly fee is less than 10 - 12 minutes per annoying commercial time without using 10 - 12 minutes per hour) It's about $ 12.
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