Internet of vehicles or will be affected by voice-activated navigation technology

[Audio Network Information] In the history of the development of human technological civilization, it is always accompanied by the extension and liberation of perception and limbs, from knotting notes to video calls, from old horses to satellite navigation, from bonfires to intelligent traffic, etc. Human limbs and their perception systems are constantly expanding their sphere of influence, and in this process, information flows from simple to complex, from one-way to two-way. Internet-based Internet technology has realized the networking of people's minds, which has led to an unprecedented explosion of information in human history. As a subsidiary or derivative of human limbs, cars and their networking projects will undoubtedly bring greater human space to expand their limbs. The change. At the end of the Internet of Vehicles technology, people began to realize that in the era of Internet of Vehicles, "moving mouth" is much faster than "hands-on". Along this kind of idea of ​​using mouth navigation, the voice control technology is fully realized in the field of vehicle-mounted mainframes, the human-machine dialogue mode is reformed, and the use efficiency and user viscosity of the vehicle-connected terminal equipment are improved from the technical end, and it has gradually become an important link to promote the development of the vehicle network.

What are the benefits of voice control? <br> How high is the contribution rate of voice control technology to the car host? If, in other words, the contact operation and non-contact operation of the car host are more suitable for car use, many may be engaged in car. People in the host industry will suddenly wake up. At present, most vehicle-mounted mainframes implement functions through contact operations such as buttons, knobs, and touch screens. Such physical contacts have a great relationship with the physical limits of buttons, knobs, and touch screens, such as the damping of buttons, knobs, and the life of touch screens. Wait. In the normal service life range, a functioning vehicle host is accompanied by a large risk of misoperation. In terms of improving the efficiency of function control, companies such as navigation manufacturers are seeking a more efficient way. At present, the prevailing fact in the control of the vehicle host is that when the vehicle is in the driving state, when we want to change the navigation path, we need to manually touch the screen to set the destination, path, etc., especially when the destination is input, the system cannot The probability of identification is high. This situation is common in the main car host functions such as radio, DVD, Bluetooth, etc., although we have set up a lot of shortcuts, such as navigation path memory, radio storage, Bluetooth matching records and other personalized operation methods, in the long run, these Shortcuts don't make the most of the world, and because of this, there is a lack of revolutionary products in the way the car is operated.

Many factory engineers told the author that the function of some touch keys or touch screens is not easy to implement. Due to the problem of touch sensitivity and the distance between menus, the trouble of misoperation will always bother the owner. In addition, any car host always has a long service life, and its button will decrease its sensitivity with time and application times. Once the button fails, it will be re-used after many twists and turns.

It is precisely because of the existence of these problems of contact operation that the advantages of the non-contact operation mode are highlighted. At present, the non-contact operation is more mature and is a voice control technology. Therefore, we can also understand why there is a greater advantage in using non-contact operation. The sound recognition system inside the car host is a hard device, which is more durable than software and peripherals (screens, buttons, etc.). Therefore, as long as the Chinese language and pronunciation are basically accurate, the voice recognition system inside the vehicle host can identify the owner's needs higher. Of course, the sound control technology used in the initial stage of the car host, there will certainly be a phenomenon of low recognition rate, but with the emergence of competition, the corresponding voice recognition technology will certainly have a larger breakthrough, thereby improving the sensitivity of the car host voice recognition.

The bottleneck of voice control technology <br> The emergence of any technology, although it may have an overwhelming advantage over the technology it replaces, is not the technology is the optimal choice, for voice control technology, this argument is also true. From the advent of voice control technology to the beginning of the car host industry, it has been nearly 20 years, not too fast, but it is not slow, at least not too late.

In terms of the sound control functions and actual performance of several on-board mainframes that the author has observed, the main problem is concentrated on the use environment, and the technology itself has no problem.

Objectively speaking, for the car host, voice control technology is a revolutionary advanced technology, but it is undeniable that after all, the voice control technology uses a non-contact operation mode, and its transmission mode is affected by the transmission medium, and is transmitted wirelessly. The quality of the synthesis is not very good and needs to be further improved. In the laboratory test, the effect may be quite good, but when the background noise is large, especially when used in the car, the problem of low recognition rate appears. In addition, there are other factors that affect the function of the voice control.

There is no doubt that the use of the environment is one of the most direct reasons for the impact of voice control. Generally speaking, in a quiet environment, the voice recognition system can show good recognition and high recognition ability, but in a noisy environment, the effect of voice control function will continue to decrease, and with the increasing noise, recognition The rate will be greatly reduced, resulting in incorrect identification. In addition, the distance of the sound source will also greatly reduce the recognition effect. The source here is not the host, but the mouth of the person. The so-called source distance indicates the distance between the mouth and the sound hole of the vehicle. Let us first learn about the speech recognition efficiency of some smartphones. Under normal circumstances, when people use a mobile phone, they usually talk to the microphone with their mouths. At this time, the distance between the mobile phone and the mouth is kept within 10 cm. The voice control can achieve the best effect at this distance, but with the As the distance between sound sources increases, the speech recognition rate will be significantly reduced, especially in the operating environment, which is even less satisfactory. It can be seen that in the car, the distance between the vehicle host and the sound source is generally about 60 cm. How to solve the energy loss caused by the audio transmission in this distance, which causes the voice control device to be unrecognized is a big problem.

The last influencing factor is attributed to the properties of the sound source. The attribute of the so-called sound source should be the dialect, voice, intonation and speed of speech spoken by the user. Different attributes have different effects on the voice control function. In terms of language, because the geographical characteristics of the owner are obvious, there are usually standard Mandarin and dialect Mandarin. In standard Mandarin, the speech recognition rate of the mobile phone will have higher stability, while the speech recognition rate of dialect Mandarin is relatively much worse. . Of course, in terms of speech rate and intonation, the influence of different manufacturers' voice control technologies is different.

Voice control technology on-board <br> From 2010 to the end of 2011, the car host has undergone tremendous changes in terms of hardware and software. The market has further opened its arms on the road of differentiation. From the hardware point of view, the platform of the car host is not Then WinCE dominates the world, Android and other platforms began to join the car host, and continue the rapid momentum of the mobile phone field; from the software point of view, voice control technology joined the car host has become a consensus in a small scope, many manufacturers have begun mass production or Pre-research.

From the current product form, the car host with full application of voice control technology has not yet appeared. The current car host voice control system is only a function selling point of the host. This aspect is related to the manufacturer’s “wall-mounted mentality”. Whether or not the voice control is fully realized requires the technical and market sides to verify, and cannot be rushed. In the long run, voice control technology will be another hot spot after the upgrade of the core and platform hardware. From this point of view, the "one-button navigation" technology that was popular in 2010 is only a "first experience" of voice control technology applied to the navigation function. Of course, this "first night" brings the industry's "pleasure" to the aftermath. Different from “one-button navigation”, voice control technology is more a combination of “embedded” technology and “cloud computing”. Of course, this does not conflict with the technology provided by “one-button navigation”. .

Now it seems that the biggest benefit of the car-controlled voice-activated technology is that the owner's hands do not leave the steering wheel to achieve the function control of the host. Perhaps, this technology can bring unexpected benefits to the high rate of universal repair of car hosts. Of course, the potential risks are also very high, and the biggest problem is the recognition rate. How to solve the problem that the recognition rate of the vehicle host may not be high under noisy driving conditions? According to the solutions that have appeared in the front and rear loading markets, the two methods may be helpful to solve this problem. First, the Bluetooth is installed on the A-pillar side of the driver's seat. Solve the idea, which shortens the distance between the sound source and the sound collecting hole of the vehicle host; another solution is to further the first method, each car host is directly equipped with a wireless Bluetooth, the mobile phone, the car through wireless Bluetooth The host is combined.

From the market hotspots in 2012, the new round of sound control technology has become irreversible, and the market needs new technologies and new concepts to regain its growth momentum. In this context, the integration and integration trends of the vehicle host industry and related industries are beginning to emerge, such as various data exchange services based on cloud computing, application sharing of open platforms such as Android, and so on. If the vehicle host is still a niche industry and its industrial chain is extended, then with the catalysis of many technologies such as platform, technology and car networking, the car host is increasingly showing an open industry. Returning to the voice-activated technology itself, whether it can become a key link to promote the vehicle-mounted vehicle networking, there are still many uncertain factors. Although many voice-related products and projects have been successful, more supporting services on the offline line need to be improved. .

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