Development Trend of Car Multimedia System
The service life of in-vehicle infotainment systems is generally relatively short, which is simply incomparable with the service life of cars. Despite such a big difference between the two, the in-vehicle multimedia system of the mid-range sedan still develops to a new level.
As far as the display is concerned, its development trend is growing. In the near future, car monitors with a size of 10 "will appear in high-end cars; the current 5" display has become the standard configuration for mini cars. With the continuous improvement of the computing power of the microprocessor, the definition of the display is getting higher and higher, and the colors of the navigation system are becoming more and more rich. For example, three-dimensional landscape display or urban traffic map can also be displayed on the display from different angles. According to Continental, with the support of the multimedia system control software, it will soon be possible to display color navigation information of vehicle driving routes in the camera image. If you think this is not enough, you can also use laser projection and windshield display technology to project the vehicle's driving information onto the windshield in front of the driver. Continental Group spent a long time to develop this technology. Dr. Thomas Neumann, the leader of Continental Electronic Technology Corporation, pointed out: "This includes performance to improve driving safety."
What is the current situation? For example, what about the mid-range cars in Germany? The car multimedia equipment provided by Audi to the users of the A4 car include: wireless radio, CD player and black and white 6.5 ″ display screen. If the user is willing to spend more money, the above multimedia equipment can also be replaced by wireless radio, color 6.5 ″ display screen, dual speakers or select digital car radio. With the SD card reader, you can listen to music in MP3 and WMA formats, and its Bluetooth interface allows drivers to use their mobile phones.
Audi and Mercedes-Benz plans
Audi plans to equip its new generation of two models with a full set of multimedia entertainment devices controlled by the MMI user multimedia interactive system, including satellite navigation systems. For these two models, some auxiliary equipment such as Bluetooth car phone, TV stereo and voice operating system are included. Navigation information comes from DVD high-end infotainment system. This variant uses the AMI Audi music interface system. Here, both iPod and MP3 player with USB interface can be controlled by MMI user multimedia interactive system. In order to keep up with the shorter pace of electronic entertainment technology update and replacement, Audi has adopted a modular structured design for its AMI music interface system software. The module that communicates with the vehicle is located in the controller of the car and is isolated by the firewall. The data communication with the music player is realized by a separate driver software. For new players, DVD players, etc., new driver software has been specially developed and designed, which is integrated in the controller and will not cause interference to internal communications.
In the Audi A4 sedan, Kronberg & Schubert completed the connection of the infotainment system with the cable harnesses for the interior and instrument panels it produces. Part of the wires in this cable harness use fiber optic cables. In addition, they also provide complete sets of engine control cables and other cables for Audi A4 cars.
In the new Mercedes-Benz C-Class sedan, there are three kinds of infotainment systems for users to choose from. In the mass production of conventional C-class cars, it is equipped with speed-related volume adjustment, a keyboard for entering phone numbers and radio band adjustment equipment, and a Bluetooth interface connected to a mobile phone. In the basic configuration, the car radio has a CD player that plays MP3, four audio amplifiers with a power of 20W, and eight speakers. Various information is displayed on a 4.9 "color display fixed in the center of the instrument panel. According to the user's needs, the user can be equipped with a changer that can hold 6 CDs.
The high-end infotainment equipment is a Comand cockpit management and data multimedia system with 7 ″ color display, navigation map display screen and hard disk storage for storing navigation data. In this 4GB hard disk, music files can also be saved. Its PCMIA interface Allow users to use different memory cards to reproduce stored music.
Voice operating system
For the first time, the voice operating system understood the operation instructions issued by people. Whether it is a destination command issued by a phone, radio, or navigation system, these spoken words can become commands of the voice operating system. A microprocessor with a data processing capacity of 10MB converts these sound wave signals into digital signals of a specific frequency, and extracts phonemes from them. These phonemes are an integral part of speech. Through the phonetic comparison with the built-in dictionary and the combination of phonemes, the voice operating system can know the meaning of each word. Whether you speak German, English, French, Italian, Spanish or Dutch, it can be recognized. The largest thesaurus is in California, USA: here, it can store the names of 220,000 roads. Speech synthesis technology is also used in Mercedes-Benz C-Class cars to ensure that it can repeat important instructions about driving directions issued by car drivers, or read SMS messages aloud.
In addition to different audio navigation systems, the current M3 BMW sedan is equipped with a large number of communication facilities. Through the Internet and telephone networks, data and information can be exchanged between cars and fixed network equipment. For example, the BMW Assist system has emergency call functions, accident assistance functions, traffic information and mobile service desk functions. For example, when the airbag is released, the emergency call function will automatically send a call signal. The location signal of the vehicle is sent to the service center through SMS, and the maintenance data of the vehicle is sent to the car repair station of BMW through wireless communication service.
At the end of 2007, Volkswagen carried out a major change of communication system, and used the infotainment system developed by Continental in its Touareg, Touran and TIguan models. Its navigation hard disk has 20GB of music storage capacity, SD card reader and CD / DVD drive, etc., all of which are the highest modern products. Digital two-channel audio equipment can also guarantee good sound effects at the furthest position.
Players who love off-road vehicles can find their way to drive in the open field. Its 6.5 ″ touch screen can be subdivided into several partial views. Continental ’s entertainment information system has been equipped in Volkswagen Golf and Passat models since 2008.
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