Every song I heard it on satellite radio stars as a record in a specific format in various media. In most cases, his recording quality must be quite high, usually about 384 Kbps, is reasonably small enough to be transported on CDs and DVDs. The music tracks used in satellite radio be cataloged by a similar system criteria MP3 cataloging, ID3 tags. The choice of the music is played is created by each channel separately. DJ select tracks select usually about 20-30 minutes of music. DJ have to listen to the tracks to ensure that they are in good condition, and then just the computer to decrypt the original file. The same is repeated as the initials of 20 to 30 minutes are exhausted and music plays the cycle repeats.
Your satellite radio coding
The encryption is one of the most important elements of the digital radio. Each channel is controlled by a different encoder. In short, the Encoder uses the analog archive and turns into a digital. The scanning process happens in real-time and music files are processed in 0 and 1. This process is being carried out by powerful computers that the sound waves and frequency analysis and breaking into binary code. Does encryption process to 128 Kbps, 44 1Kh is really in CD-quality. Once the music is encoded, it is forwarded to a multiplexer where other channels is also present-the multiplexer in principle supports all channels combined and satellite radio provider only broadcast transmission. The data to data module satellite modem device is sent, and sends this satellite broadcasting organization by means of a single transmission frequencies.
What happens on Earth
Here's where the satellites. They receive the transmission and apply it to receivers we have in our homes and our cars. Satellites are located at 23000 km above us-Sirius and XM radio use every two satellites at this distance from the Earth. Satellites are located in geo-sync, what that hey orbit means above where you are referred to the service at any time. When the satellite receives the transmission encoded in 128 Kbps, 44. 1 khz re broadcasts it to the geographic area that spans. SIRIUS and XM radio use every two satellites that parts of the United States – especially the East and West coasts. For example, a satellite XM Radio covers the western part of the United States, probably a little Seattle to San Diego to the West and East of Houston, Minneapolis. Improving the sound quality is possible because the data transfer (pieces of music, news and sports) too often decided in the decoding process.
The antenna
Antenna connected to the satellite radio receiver takes the transmission bandwidth of l. recent technological advances have allowed broadcasters make small enough to have the mobile sites digital radio receivers. In the early days of satellite radio, would be a great plan of the dish be mounted on the car to the signal. Also, before more compact recipients that are created, satellite radio receivers initially required electronic transactions conducted worms one line satellite view. Dish receivers has eliminated all the problems of its predecessors and almost anywhere without taking too much space can be equipped.
Output and receiver
The receiver is the device that decodes the data basically do exactly the opposite of the encryption process was like. After receiving the signal from the antenna that amplifies and converts it to usable sound. Car or home audio system is able to reproduce the satellite radio channel selected. The rest of the process is just like analog broadcasts will work with an amplifier and speakers.
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