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The radio goes from the radio to the radio

Click： Time：2017-05-31 16:51:50

At present, digital audio broadcasting has been widely used worldwide, and 36 countries have adopted or are testing and testing. Sixteen countries in Europe have broadcast digital audio broadcasts. In September 1995, the BBC first broadcast the digital audio broadcast. Now Britain has 10 national commercial radio and the BBC radio in providing services, much of the 22000 London taxi is equipped with digital audio receiver, is more than 70% of residents can receive digital audio broadcasting. Germany, meanwhile, plans to turn off FM broadcasts in 2010 and use digital audio broadcasts entirely. In Asia, Singapore is the only country that can provide digital audio broadcasts across the country. And although China began in 1996 in Beijing and guangzhou to digital audio broadcasting pilot work, but a clear digital audio broadcasting the absence of development policy is still the national overall development is in control。

There is also a digital broadcast system that is already being broadcast around the world, which is the satellite digital audio broadcasting system。Satellite digital audio broadcasting has the same advantages as digital audio broadcasting，There are other advantages。For example, its coverage is so large that no ground broadcasting system can be compared, especially for large platforms with global and national coverage. Its investment and operating costs are relatively low, mainly for the construction cost of ground uplink stations. It is with the FM network construction investment ratio of 1 to 200, and the FM radio network operating cost ratio is 1: 100. In addition, it broadcasts according to different broadcast quality need to choose any from the economic point of broadcast bandwidth, such as broadcast music program, the highest can choose 128K/ seconds bit rate, which can achieve CD like quality, for the general broadcast, you can choose a low bit rate, at the same time all kinds of bandwidth selection program to arrange the programs to complete the combination can be an easy job to do. The first to enter this broad market is world wide international limited, the United States XM and Sirius company. The former is a satellite company that operates the global digital audio broadcasting service outside the US market.

Because digital audio broadcasting will be necessary in the future, the market demand for digital radio or receiver will be greatly increased. The Consumer Electronics Association held in January 7th this year, the Las Garth International Consumer Electronics Show said in a report, the user satellite broadcast at an annual growth of more than millions of high speed, the United States in 2003 only 1 million 500 thousand of users, increase to 3 million 200 thousand in 2004, this year will be increased to 5 million 500 thousand. Matthew Bannister, who heads the Broadcasting British Corporation, said the company's digital radio technology is in the lead in britain. He also speculated that in the next three years of commissioning, the British audience will reach 60% of the country's total population. In 2001, the Japanese Broadcasting Bureau and more than 40 manufacturers and related companies held a meeting of promoters 10 days ago, and set up the "digital radio Promotion Association", and entered the broadcast preparation stage. The chief representative of the world wide group's Beijing office said that the world wide group would enter the Chinese market in full accordance with China's rules. If you can successfully enter the Chinese market, it is expected that within 5 years, the world wide system of the number of receivers can reach more than 5 million units.