Three international terrestrial digital broadcasting standards: This article refers to the address: http:// 1. DAB/DMB 2. DRM 3. HDRadio The DAB (Digital Audio Broadcasting Standard) is used by broadcasting systems in many countries, especially in European countries, and there are many DAB radios available on the market. In addition to distortion-free reception and CD-quality sound quality, the DAB's audio coding standard allows multiple digital broadcast and video channels to be transmitted with the same transmitter. More than 500 million users worldwide receive nearly 1,000 different DAB broadcasts. Digital Multimedia Broadcasting (DMB) evolved from DAB to broadcast programs using existing DAB infrastructure. The DMB standard allows for an increase in the number of channels in the same spectrum and provides new services like data and video file transfers. The first commercial DMB has been launched in South Korea and the DMB trial is being conducted in Europe. DRM (World Digital Broadcasting) is a new open broadcast standard that has only recently been developed to carry digital broadcast signals over long, medium and short waves. Unlike digital broadcasting, which requires redistribution of frequencies, DRM can use the existing AM (lower 30MHz) band more efficiently. DRM uses an in-band-synchronous (IBOC) technology that broadcasts both analog and digital signals simultaneously on the same frequency. DRM radio has appeared in Europe and outside Europe, and the first DRM radios are available. Another IBOC technology, HDRadio, allows AM and FM stations to simultaneously broadcast digital and analog signals, providing broadcasters with a platform to broadcast multiple programs over the same frequency (multicast); HDRadio provides CD-quality HD sound quality, real-time weather forecasts and latest Traffic information, scrolling text and image content. There are more than 1,000 HDRadio radio stations in the United States, which account for 90% of the total US population. Several other countries are also testing the technology. Satellite broadcasting standard Satellite broadcasting technology uses commercial communication satellites to transmit digital radio signals on five continents. World Wide, Sirius and XMRadio are the major satellite broadcasting companies in the world. The coverage of World Wide is mainly in Africa, Asia and parts of Europe, Sirius and XMRadio. Mainly in North America. The three major broadcasters are private companies, the services are paid, and the decoding and decoding of the programs requires the unique hardware they provide. According to the Consumer Electronics Association, the global satellite broadcasting rate reached 10% in early 2006. STMicroelectronics Solutions ST's automotive infotainment and navigation portfolio includes a full range of automotive digital radio and multimedia solutions, automotive navigation and telematics solutions and automotive wireless connectivity solutions. By integrating expertise in automotive systems, multimedia and communications, and a wealth of intellectual property modules, STMicroelectronics supports all current and future integrated services that help improve the driving experience. Because the spectrum can be used more efficiently, the number of digital broadcasting stations is much higher than that of ordinary analog broadcasting. Moreover, the digital broadcasting has higher signal receiving quality, the radio is easier to use, and it also provides three-in-one services for voice, video and data. Provided an opportunity. STMicroelectronics supports all major terrestrial and satellite digital broadcasting standards worldwide, including DAB/DMB, World Digital Broadcasting, HDRadio, XMRadio, Sirius and World Wide. STMicroelectronics supplies all the components needed for car radios, such as antennas, tuners, baseband chips, multimedia processing and playback chips. STMicroelectronics optimized the car radio system for harsh reception environments and minimum power requirements. STMicroelectronics is at the forefront of the world in developing the next generation of digital broadcast services for vehicles. The world's first in-vehicle mobile TV in Germany in June 2006 proved the audio and video quality and scalability of ST's T-DMB (Terrestrial Digital Multimedia Broadcasting Solution) when driving at speeds of up to 200 km/h. Very good and very low energy consumption. ST's system-centric NaviFlex program is a complete navigation and infotainment system hardware and software platform that provides a high-performance, low-cost solution for in-vehicle digital technology integration. NaviFlex's complete solution for car radio navigation and telematics, automotive connectivity accessories (handsfree/audio streaming), audio and video playback media devices, mobile TV and rear seat entertainment information systems. The main hardware modules of the platform are STMicroelectronics' Nomadik multimedia application processor and GPS receiver. ST's Nomadik multi-core application processor has a built-in smart accelerator that guarantees outstanding audio, video and image quality in automotive multimedia applications. With the industry's lowest power consumption and superior multimedia performance, this processor features a feature-rich security framework and a comprehensive range of peripheral interfaces for seamless connection to system external devices such as car radios, high-quality audio and video playback. Digital to analog converter and memory card (SD/MMC) or USB interface. The characteristics of ST's GPS products are accurate positioning, energy saving. A single-chip GPS solution requires few external components, making system implementation simpler and more space efficient in practical applications. If used in conjunction with a host processor (Nomadik), ST's GPS chips are telematics and navigation platforms (dashboard built-in or handheld), GNSS (Global Navigation Satellite System) highway tolls, car radio control and Ideal for automotive computer applications. STMicroelectronics is a major semiconductor supplier to the GR-Poster Alliance, which was founded to develop a terminal receiver for Galileo, a Galileo-like European satellite navigation system. Because of the complete Galileo development plan, ST can meet the needs of future development in advance, for example, the pan-European plan eCall that integrates an on-board emergency call location system in each new car. ST's automotive device connectivity solutions include high-speed USB, Bluetooth and Data Short Range Communications (DSRC).
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