Three major international terrestrial digital broadcasting standards:
1. DAB/DMB
2. DRM
3. HDRadio
DAB (Digital Audio Broadcasting Standard) is adopted by the broadcasting systems of many countries, especially European countries, and there are many DAB radios available on the market. In addition to distortion-free reception and CD-level sound quality, DAB's audio coding standard also allows multiple digital broadcast and video channels to be transmitted with the same transmitter. Currently, more than 500 million users worldwide receive nearly 1,000 different DAB radio programs.
Digital Multimedia Broadcasting (DMB) evolved from DAB and uses the existing DAB infrastructure to broadcast programs. The DMB standard allows to increase the number of channels within the same frequency spectrum and provide new services such as data and video file transmission. The first commercial DMB has been broadcast in South Korea, and DMB trial broadcasts are underway in Europe.
DRM (World Digital Broadcasting) is a new open broadcasting standard, which has not been developed until recently, and can carry digital broadcasting signals through long wave, medium wave and short wave. Unlike digital broadcasting, which requires reallocation of frequencies, DRM can use the existing amplitude modulation (AM) frequency band (30MHz lower) more efficiently. DRM uses a technology called in-band co-frequency (IBOC), which can simultaneously broadcast analog and digital signals on the same frequency.
DRM broadcasting has appeared in Europe and outside Europe, the first batch of DRM radios have been listed. Another IBOC technology HDRadio allows AM and FM radio stations to simultaneously broadcast digital and analog signals, providing broadcasters with a platform for broadcasting multiple programs on the same frequency (multicast); HDRadio provides CD-level high-definition sound quality, real-time weather forecasts and the latest Traffic information, scrolling text and image content.
There are more than 1,000 HDRadio radio stations in the United States, and the audience accounts for 90% of the total population of the United States. Several other countries are also testing this technology.
Satellite Broadcasting Standard
Satellite broadcasting technology uses commercial communication satellites to transmit digital radio signals on the five continents of the world. Shiguang, Sirius and XMRadio are the major satellite broadcasting companies in the world today. Shiguang signal coverage is mainly in Africa, Asia and parts of Europe, Sirius and XMRadio Mainly in North America. The three major broadcasting companies are all private companies, and their services are paid. The decoding and broadcasting of programs requires their own unique hardware.
According to the statistics of the Consumer Electronics Association, at the beginning of 2006, the global satellite broadcast household access rate reached 10%.
ST's solution
ST's automotive infotainment and navigation product portfolio includes a variety of complete automotive digital radio and multimedia solutions, automotive navigation and telematics solutions, and automotive wireless connectivity solutions. By integrating professional skills and rich intellectual property modules in the fields of automotive systems, multimedia and communications, STMicroelectronics supports all current and future integrated services that help improve the driving experience.
Because it can improve the efficiency of spectrum use, the number of digital broadcasting stations is much higher than that of ordinary analog broadcasting. Moreover, the signal reception quality of digital broadcasting is higher, the radio is easier to use, and it also serves the triple play of voice, video and data Provided an opportunity.
STMicroelectronics supports all major terrestrial and satellite digital broadcasting standards in the world, including DAB/DMB, World Digital Broadcasting, HDRadio, XMRadio, Sirius and World Wide.
STMicroelectronics provides all the components required for car radios, such as antennas, tuners, baseband chips, multimedia processing and playback chips. In response to the harsh receiving environment and minimum power consumption requirements, STMicroelectronics optimized the car radio system.
STMicroelectronics is at the forefront of the world in developing next-generation digital broadcasting services for vehicles. The world’s first in-vehicle mobile TV realized in Germany in June 2006 proved that ST's T-DMB (Terrestrial Digital Multimedia Broadcasting Solution) audio and video quality and scalability performance when the car is traveling at speeds of up to 200 kilometers per hour Very good, very low energy consumption.
ST's system-centric NaviFlex project is a complete navigation and infotainment system software and hardware platform, providing a high-performance, low-cost solution for the integration of digital technology in the car. NaviFlex's complete solution is used for car radio navigation and telematics, car connection accessories (hands-free/audio streaming), audio and video playback media devices, mobile TV and rear seat entertainment information systems. The main hardware modules of the platform are ST's Nomadik multimedia application processor and GPS receiver.
STMicroelectronics’ Nomadik multi-core application processor has a built-in smart accelerator to ensure excellent audio, video and image quality in automotive multimedia applications. This processor has the industry's lowest power consumption and excellent multimedia performance. It is equipped with a feature-rich security framework and a complete range of peripheral interfaces. It can seamlessly connect to system external devices, such as car radios and high-quality audio and video playback. Digital-to-analog converter and memory card (SD/MMC) or USB interface.
ST's GPS products are characterized by accurate positioning, energy saving and power saving. The single-chip GPS solution requires few external components, and the system implementation is simpler and more space efficient in practical applications. If used in conjunction with a main processor (Nomadik), ST’s GPS chip is a telematics and navigation platform (built-in dashboard or handheld device), GNSS (Global Navigation Satellite System) highway toll, car radio control and Ideal for automotive computer applications.
STMicroelectronics is the main semiconductor supplier of the GR-Poster Alliance. The purpose of the organization is to develop terminal receivers for the Galileo project, which is a European satellite navigation system similar to GPS.
Because it has formulated a complete Galileo development plan, STMicroelectronics is able to meet future development needs in advance, for example, the pan-European plan eCall that integrates an on-board emergency call positioning system in every new car. ST's automotive device connectivity solutions include high-speed USB, Bluetooth, and data short-range communication (DSRC).
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