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Satellite radio systems are actually part of a larger group of broadcasting mediums, which specialists refer to as Digital Multimedia Broadcasting or DMB. This digital transmission system is used in order to send data to different receivers such as radios, television sets or mobile phones and PDAs. There are two different ways of using digital multimedia broadcasting - S-DMB which is broadcasting via a satellite or T-DMB which uses terrestrial emitters. The complexity of the entire digital multimedia broadcasting field is huge. Out of all the features and characteristics digital broadcasting offers, satellite radio is probably the most spectacular as it generated immense interest and triggered an intense competition between the two main satellite radio broadcasters, Sirius and XM Radio. The development of satellite radio and other forms of digital broadcasting is spectacular because it offers two main qualities that terrestrial emitters are deficient in: quality and coverage. In the case of satellite radio, for example, the sound quality from a satellite broadcast is much higher than AM or FM broadcasts, as the hissing noises and transmission disturbances are eliminated.

Technical features of digital multimedia broadcasting - overview

Whether it refers to television, satellite radio or cell phone transmissions, digital multimedia broadcasting is based on the Eureka 147 DAB standard. Digital television uses the T-DMB which is made for transmissions on frequency bands III (VHF) and L (SHF). T-DMB is an ETSI standard (TS 102 427 and TS 102 428).
T-DMB uses MPEG-4 Part 10 (H264) for the video and MPEG-4 Part 3 BSAC or HE-AAC V2 for the audio.  When  it comes to satellite radio, there were a few issues to be resolved by the main satellite radio broadcasters. The satellite radio receiver needs to be in the line of sight of the satellite to receive the transmission – and there is the problem of having different landscaping objects block the direct transmission. Land based devices were installed in order to eliminate the lack of direct satellite transmission. Since the wider spectrum of broadcasts has to be covered, digital multimedia broadcasting uses OFDM-4DPSK modulation and a chip of T-DMB receiver is also provided by MPEG-2 Transport Stream De-multiplexer. This helps reduce the negative effects of shadowing and fading, present in many digital transmissions.

The future of digital multimedia broadcasting

The transfer from the analog world to the digital one is obvious in all fields of work. Since digital multimedia broadcasting is developing so quickly, there is a silent battle going on between the new age digital technology and the classic analog one. OF course, many compare the transition from the analog to the completely digital era with the way audio cassettes were replaced by CDs and later on even DVDs. However, the development of digital multimedia broadcasting is slower since it happens on so many levels at the same time. Digital television is taking us into new spaces that are basically hybrids of the features of regular TV and characteristics of the Internet. Satellite radio is also taking huge leaps forward, with more and more programs having satellite radio exclusivity. There are even discussion of moving events like the MLB exclusively on satellite radio, which would provide one of the first deadly strikes against terrestrial radio broadcasting. Digital data transmission is fast and accurate, and so far reality proves that the satellites used in order to facilitate broadcasting and reliable. Most digital multimedia broadcasting companies that own satellites also have backup ones ready to go in orbit and replace a defective one. Some other benefits of digital multimedia broadcasting recommend it as a next step in the development of broadcasting. From the consumer’s point of view, the quality and interactivity options of digital TV or satellite radio broadcasts are important features. Although most digital multimedia broadcasting channels and technologies are still complex and sometimes expensive, the evolution of digital broadcasting seems to be here to stay.

There is a lot to think about when planning a wedding. If you are the bride, you have so much on your mind that something is bound to be forgotten. That is when wedding planner books, or even hiring wedding planners might be a good idea. I found that despite my good planning and my book, I was still forgetting some small things that would have ended up being very big problems on my wedding day. I completely forgot about bridal purses, and had it not been for my maid of honor, I may have forgotten completely. I would have been sorry.

Your wedding day is not a day when you want to carry around your regular purse. You spend a lot of time making sure your dress, shoes, hair, accessories, and even your stockings are just right. That look is ruined unless you have bridal purses that match. I haven’t met a woman yet that did not need some sort of purse with her on her wedding day. If you forget to look at bridal purses, you may find you are suddenly all out of whack when you should be feeling put together and calm.

My maid of honor had called me about two weeks before my wedding asking me about a few things. One of those things was bridal purses. To my horror, I realized that I had not thought about it and I had no idea if I had time to go out and find one. I had too much to do, and was working on top of that. She told me not to worry, and asked me to take a picture of my dress and email it to her so she could find something for me. She lived a number of hours away, so a photo of the dress would have had to do.

I had quite a few bags of my own, but none of them were anything near what bridal purses should be. I did not own anything in white, let alone the off white that was my dress. When she came up for my wedding, she handed me a purse that was absolutely perfect, and even matched my dress. Thank goodness for her and her good thinking! I never thought about bridal purses, but by midday it became very apparent that I needed one, and after all these years, I still thank her for thinking of it, and taking care of the problem for me.