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Digital multimedia broadcasting (DMB) and DAB-IP are both suitable for mobile radio and TV because they support MPEG 4 AVC and WMV9 respectively as video codecs. However, a DMB video subchannel can easily be added to any DAB transmission, as it was designed to be carried on a DAB subchannel.
An FM band expander (band converter, FM converter) is a device used on Japanese car stereo systems to enable them to receive international FM frequencies, when used or grey import Japanese cars are shipped to other markets. Japanese radio bands are between 76 and 90 MHz whereas the international broadcast plan is between 87.5 and 108 MHz.
The typical bitrate for DAB stereo programs is 128 kilobit per second or less and as a result most radio stations on DAB have a poorer sound quality than FM does under similar conditions. [40] Many DAB stations also broadcast in mono. In contrast, DAB+ uses the newer AAC+ codec and HD FM uses a codec based upon the MPEG-4 HE-AAC standard.
In 1933, Crossley Motors offered a factory fitted car radio for £35. [8] By the late 1930s, push button AM radios were considered a standard feature. In 1946, there were an estimated 9 million AM car radios in use. [9] An FM receiver was offered by Blaupunkt in 1952. In 1953, Becker introduced the AM/FM Becker Mexico with a Variometer tuner ...
Lower prices, new radio stations and marketing have increased the uptake of DAB radio in the UK. [16] Digital radios were first sold as car radios in 1997, priced around £800, with hi-fi tuners costing up to £2,000 being released two years later. [10]
Satellite radio uses the 2.3 GHz S band in North America for nationwide digital radio broadcasting. [6] MobaHO! operated at 2.6 GHz. In other parts of the world, satellite radio uses part of the 1.4 GHz L band allocated for DAB. [7] Satellite radio subscribers purchase a receiver and pay a monthly subscription fee to listen to programming.
Digital audio radio service (DARS) is any type of digital radio program service. In the United States it is the official FCC term for digital radio services. The most popular type of DARS in the U.S. and Canada is SDARS (Satellite Digital Audio Radio Service), used by Sirius Satellite Radio and XM Satellite Radio. XM and Sirius both operate in ...
DAB MUX 1 Digital Radio Cibicom is the gatekeeper of this multiplex broadcasting commercial national radio. DAB MUX 2 National public service stations. DR's 7 channels (including the 10 regional variations of DR P4), as well as the privately owned, public service channel Radio4. DAB MUX 3 Regional and local commercial radio.