Electronic enthusiast network news : The previous generation system uses the built-in functions of the car to provide entertainment and information systems, while the next-generation car infotainment system will be derived from the driver ’s mobile devices, such as iPhone, iPad and other smart phones and tablets. This is a huge change. In the information age, the screen has become an important medium for information output, and the in-vehicle terminal screen has formed a new trend. Through the mapping technology, the advantages of mobile devices can be fully utilized on the screen of the car terminal. However, it is the key for the driver to carry out more convenient and safer human-computer interaction while driving. In the past, ordinary manual operation is bound to bring hidden dangers. In view of this, voice-based mapping technology will become the general trend of vehicle-mounted terminals.
In order to meet the needs of consumers and effectively combine smartphones and in-vehicle terminal screens, most car manufacturers are happy to combine cars and mobile applications to provide drivers and passengers with mobile device-based infotainment systems. These automakers will be among the forefront of the next revolution in in-vehicle social media and interactive functions. According to IHS iSuppli analysis, the trend of integrating smart phone applications will develop rapidly in the automotive industry. In 2018, the sales of car audio integrated smart phone applications will increase from thousands in 2011 to nearly 5 million.
Figure 1 shows the implementation process of voice-based smart terminal mapping technology. Through the mapping module, mobile devices including smart phones and tablet computers are effectively connected to the on-board display and the vehicle. Due to the rich networking capabilities of smart phones, they can be carried anywhere and used anytime, anywhere, so a series of mobile applications can be ported to the car, so that the driver can get a better interactive experience.
Figure 1 The realization process of voice-based intelligent terminal mapping technology
Car voice recognition technology realizes intelligent interaction
At the same time, the voice recognition system came into being because the driver could not use the mobile phone while driving. There are currently two types of in-vehicle voice recognition technology, embedded and cloud computing. Embedded speech recognition technology is a local, personal, narrow-sound speech recognition. It has obvious shortcomings, limited by the storage capacity of the terminal, it is impossible to realize the speech recognition of different accents and different people. Cloud recognition requires noise processing before it can be used in a car environment.
Now there is also a voice recognition technology for the exclusive car environment. The background uses a large number of different people's accent training models and car noise models. It is suitable for the car environment and has a broad spectrum. The recognition rate reaches more than 90%.
Through the cloud service of the voice cloud platform shown in FIG. 2 + the mapping terminal connection to the smartphone and the display device + the terminal application service startup mode, the purpose of voice interaction can be effectively achieved. After joining the voice cloud platform, users can express intent instructions according to their own language habits, the server performs voice recognition response instructions, and the smartphone transmits the content to the vehicle terminal screen display through the mapping module. The mapping module uses a smart terminal mapping chip, which can transmit audio and video information to the display device through the A / V channel to realize dual-screen mapping between the smartphone and the display device.
Figure 2 Cloud service of voice cloud platform + mapping terminal connection to smartphones and display devices + terminal application service startup mode
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