The whole content of the radio service that is both data and audio content is represented by only two carriers. Other four carriers carry duplicates of the same content to achieve redundancy through diversity of signals. Time delayed and error correction schemes are used for carrying data on each carrier. This is done to enhance availability.
Thus the total effective radio spectrum used for content is a little over four mega hertz. The groups of two carriers broadcast hundred eight kilobits per second streams. Combined streams whose combination is done using a patented process form a variable number of channels using a variety of bit rates. Thus bandwidth is separated into segments of four kilo bit per second virtual streams which are combined to form audio and data channels of varying bit rates from four to sixty four kilobits per second in the current service. The audio content of the XM signals is pre processed using the audio processors which use the special coding technique.
They also include spectral band replication. Audio data is stored digitally using MPEG two audio technologies at three hundred and eighty four kilo bits and is further processed by the audio processors on the way to broadcast. Channels of XM namely XM Pop and fine tuning are broadcasted in surround audio quality.
This technology is a partnership between XM and Neural Audio Corporation which provides content with six discrete channels of digital full fidelity audio powered by Neural Audio technology. Another channel namely XM live also broadcasts in this format for select concerts and studio performances. Manufacturing partners of XM have introduced home audio systems capable of playing XM HD Surround powered by Neural Audio. XM satellite radio's music is commercial free.
This concept came into existence after many formal announcements and public meetings. Also the music can be recorded and can be enjoyed afterwards. This is possible because of the enhanced compatible devices. The music content recorded by a subscriber is only available when the subscriber has an active account with XM Satellite Radio.
But if the account is terminated the recorded content will becomes inaccessible. Also there is a condition that if a subscriber fails to listen to a total of 8 hours of programming a month the recorded content will not be accessible. Music that has been recorded can only be accessed on the portable devices and it can not be transferred to a home computer or separate digital music player. This technique of recording music is not new. Applications have been developed which record songs to MP3 and tag them with the artist and title information directly from the XM network. This technique was tried to spoil by discontinuing the required XM PCR radio. But the organization responded by quickly rolling out adaptive interfaces to allow almost any XM subscriber to use their tuner to build music libraries directly from XM broadcasts.
Got a Question? Ask.
Ask the community a question about this article:
Frequently Asked Questions
Changing channels xm radio
By: HipGrams | 15-09-2008
Cannot change channels on my Timex TMX1 XM radio?
Anyone can help?
Thanx,
HipGrams
How do activate a factory radio with xm radio in ...
By: lumpy3551 | 01-05-2008
how do activate a factory radio with xm radio in like in a 2005 honda accord
Can Sirius be switched for XM in my car?
By: Itay. | 29-01-2008
Can the Sirius radio, which is integrated with my car's stereo be switched for XM? Is the hardware different? Can this be done? I'm assuming I'd have to do something with the antenna and/or receiver, but these are part of my car's standard stereo... Ideas?
The Howard Stern Show
By: evan7711 | 08-04-2007
What is Howard Stern's typical audience for his Sirius radio program?
Howard Stern's listening ratings
By: Jingo | 27-02-2007
How's Howard Stern's show doing? I remember a few years ago he started working for the satellite radio company and his ratings were very high, he saved the company. Are his ratings still high?
Satellite radio
By: evan7711 | 11-02-2007
I was thinking of getting a satellite radio for my car. Do you recommend XM or Sirius? Or do you recommend another option instead of satellite radio?
Q&A Powered by:
Latest Satellite Radio Articles
Three New DAB Radios To Tempt You Away From FM
By: Shaun Parker | 22/08/2008
An objective comparison of three new leading models of DAB Radio from three seperate manufacturers.
Space Age Sensor for Earth
By: rahul | 17/08/2008
This is article which gives you sensor information about earth
Some of the Top Reasons That Two Way Radios are Undergoing a Resurgence in Popularity
By: Domingo Mandelo | 24/07/2008
There was a time not too many years ago, that two way radios were the latest in personal communications technology. However; they were quite expensive and the best, most powerful models were slightly smaller than a carton of cigarettes, with a retractable antennae that extended out about three feet. For people such as hunters and fishermen though, they were just what they needed to keep in touch.
Portable Two Way Radios – How to Extend Your Battery Life
By: Domingo Mandelo | 24/07/2008
Portable two way radios are very similar to cell phones in many ways, with one big difference. Cell phones transmit to a tower and portable two way radios transmit directly to one another. People who do own and use both cell phones and two way radios however, all notice one similarity that they both share and that is that their batteries never seem to last as long as they would like.
All About Motorola Two Way Radios
By: Domingo Mandelo | 24/07/2008
Motorola Corp. is currently one of the largest leading suppliers of two way radios in the industry. They feature a full range of not just two way radios, but also an extensive selection of accessories for the radios that they sell. They span the spectrum from basic economical family models, to the latest in state of the art feature laden commercial style two way radios.
A Brief Review of the Latest Two Way Radio Accessories That are Now Available
By: Domingo Mandelo | 24/07/2008
Over the years, research developers have been hard at work developing accessory batteries for all hand held electronic devices. For cell phone and two way radio users the need was all the more urgent, as people began to become more dependent on these increasingly useful communication devices. What has finally been arrived at is what is called lithium ion batteries and they hold about twice the charge of nickel cadmium batteries.
Some Brief Information on Walkie Talkies
By: Domingo Mandelo | 24/07/2008
Developed during World War 2 for use in the military, walki talkies are now commonly used by millions of people in work and in homes all over the planet. Originally quite large and cumbersome, just like so many other electrical devices, they have shrunk in size considerably over the years. In general, a walkie talkie will have a mouthpiece to talk in and a speaker to listen from they also can come with a compact earphone microphone for discreet conversations if need be.
Common Terms and Descriptions for Users of Two Way Radios
By: Domingo Mandelo | 24/07/2008
Everyone can remember when they were kids and their first experience with two way radios at a play ground or a friends house. What is it about radio communication that is so special? No one is quite sure but for the actual inventors of the technology that experienced it for the first time, the experience must have seemed close to magical. For adults though, radio communication is usually far more utilitarian and their use of two way radios is governed by numerous rules and regulations.