OFweek wearable device network news in the domestic mobile VR a sigh of decline, Xiaomi to absolutely strong posture to enter the circle, but also bring a clean flow to the circle, we all know that there are a lot of domestic emerging VR company was born, However, in the mobile VR market has been an enhanced version of the cardboard based on the low-end poor quality of the main, while the Samsung oculus co-working gearvr, so that most domestic VR companies can not attack. It is also because Samsung GearVR validates the feasibility of the high-end mobile VR market, opening the door for Xiaomi to enter the field of VR, and also has the evaluation of today's Xiaomi VR Professional Edition (hereinafter referred to as Xiaomi VR).
Unpacking
Millet VR glasses official version of the packaging using the all black design, inherited the consistent simplicity of the millet product style. The inside of the box is very simple. There are only three things: millet VR glasses, matching handles, and instructions. It seems that millet is going to keep the concise style (absolute environmentalism).
Designs
Millet VR helmets are mainly pure white, with the science and technology of the United States is very much in line with the virtual reality tone, unknown, mysterious, but for the needs of users, other colors are more resistant to dirt, I hope there will be other versions of the follow-up color. Millet LOGO and VIRTUAL REALITY logo clearly appear in the most appropriate place. The reserved holes on both sides of the cover can be inserted into the earphones, with the adjustment distance and the confirmation button above.
The biggest highlight of this millet VR is its ring-shaped bracket headband - hanging stretchable design, so that many VR fans think of Project Morpheus born in 2014, also the current psvr. The design of millet VR on the headband uses the press extension plus rotation, press down to adjust the length of the head wear, and then rotate and put down the headrest to fix it. This design aims to distribute the force evenly and make the facial pressure sufficiently small. However, the actual experience of a high degree of integration between the body and the headband makes Xiaomi VR unable to perform facial adjustments like the psvr. Therefore, there is still some pressure on the face and nose, but the overall pressure is far less than that of domestically produced plastic boxes, including Samsung's gearvr. In addition, the face mask and headrest parts are made of island cashmere, and millet VR has obviously done more research on the contained material, so as to select this kind of mask material with very good actual effect. Overall, Xiaomi VR Professional Headset is the most comfortable mobile VR headset that the individual can currently experience.
Optical Design and Imaging
Millet VR lenses use 38mm anti-glare lenses, a large FOV of 103 degrees, and support up to 600 degrees of myopia and 200 degrees of farsight by adjusting object distance. Here is a small knowledge to everyone science, vr products generally control the FOV above 90 degrees to have a good sense of immersion, and the magnification of this interval lens needs to be controlled more than 6.5 times, which makes the traditional 1080P or even 2K screen in After 8x optical zoom (millet VR magnification), graininess is unavoidable, so friends who first touched VR should not believe those exaggerated ads. The actual measured FOV is 101 degrees, taking into account the various errors in the measurement, the resulting data is basically consistent with the official.
Speaking of lenses, we have to say that the pupil distance, and many users will complain that there will be ghosting phenomenon vr products, in addition to the software screen appears in the wrong position, this problem is basically caused by the optical lens. The millet VR lens adaptive adjustment, speaking here to interpret the misunderstanding of the adaptation, the so-called adaptive adjustment refers not to adjust the lens, but through the human eye ciliary muscle self-regulation to achieve the purpose of imaging the left and right images, that is, Said that this is not the best natural state, the so-called adjustment of the interpupillary distance in the market is to adjust the lens spacing to match the human eye, but the distance between the mobile phone screen will not change, that is to adjust the interpupillary distance is not the best if you endure Without this kind of unscientific adjustment method, then mobile VR is not suitable for you. Such dual-screen VR products like VIVE or Oculus are your solutions. Millet VR also has an infrared distance sensor, which is used to sense the contact of the face and respond to the screen in a timely manner. Taking off the screen and wearing the screen can quickly restore the screen and protect the life.
Interpupillary distance adjustment
Split screen adjustment
New interactive mode
Millet VR's interactive approach also draws on the advantages of Samsung's gearvr and Google's daydream development model. One is an external, independent sensor, and the second is a nine-axis motion sensor.
Nine-axis somatosensory handle, nine-axis only refers to the complete performance of the gyro sensor (three-axis gyroscope three-axis accelerometer three-axis magnetometer), the real motion is only three degrees of freedom, and the lack of space-oriented VR headset, only Detect the movement direction of the three axes of XYZ, unable to carry out 6 degrees of freedom movement, but millet equipped with the somatosensory handle finally let domestic players release the head and cervical spine, you only need to shake the handle to complete the function of the selected target .
Independent sensor and ATW algorithm
Millet VR helmets transmit gyroscope data through the type C interface. Half of the millet VR helmet experience is due to the role of an external, independent sensor. Through the near-1600-hz high-sampling-rate gyroscope, three degrees of freedom are oriented. The location data is transmitted to the mobile phone CPU in time, and the screen rendering is performed through the GPU thread. The other half of the role is the full presentation of the ATW low latency mechanism. In simple terms, ATW is a high-level algorithm for predicting the position of the next frame and copying the picture. The biggest effect is to reduce the delay greatly and avoid jitter drift. There are not many domestic products equipped with this algorithm. Individuals who understand that similar products do not include an all-in-one machine currently only have Huawei VR, Extreme Screen VR, and Xiaomi VR.
After adding the low latency ATW algorithm to the high sampling rate gyroscope and gradually becoming the mainstream VR standard, we conclude that any VR headset that does not have a qualified sensor and low latency algorithm is rogue.
The actual test millet VR has a slight drift phenomenon, about ten minutes after the game there will be a shift in position, this is actually the algorithm still does not eliminate the accumulated error of the gyroscope data, coupled with the error caused by somatosensory handle, the problem is more Obviously, after the firmware was updated, this phenomenon was fixed. However, under the circumscribing of the eight-character word, the direction still shifted. As a result, the head-hand was separated. Therefore, Xiaomi VR still needs a period of algorithm correction and hardware debugging. This is only slightly better on Google's daydream, but it also has this problem. It is estimated that inertial sensors are a common problem and each company needs to continue to refine its algorithmic mechanism.
Performance and Screen Performance
In terms of device compatibility, Xiaomi VR currently supports meters 5, 5s, 5s plus, note2. The first three CPUs are Qualcomm 821 and Xiaomi 5 is 820. Qualcomm has optimized the VR performance on the two processors. Basic mobile VR applications can run to 60 frames. However, combining the low delay caused by the ATW algorithm requires a better OLED screen to play to the perfect, otherwise the ordinary screen with ATW can only play 80% of its effectiveness, and meters 5, 5s, 5s plus is a non-OLED screen, The LG OLED used in note2 does not have low-endless performance. Currently, Samsung is the only manufacturer that can provide large-scale low-brightness OLED screens. It seems that a good screen is really not easy, and the cost-effective millet is In the future, I don't know how to deal with materials that are fast and costly.
Complete VR platform
Millet VR shop, divided into the official version and Play version, the official version is the need to access the millet VR professional helmet to run, the store has video and application of the two major sections, the current video section is mainly panoramic video, application section strongly recommended player Applications and all kinds of games, after statistics, there are players and games, then the biggest feature of the mi VR store is that it is connected to the interface of a large-scale video platform. Jointly Youku and iQiyi solve the content pain points, and the game part we can see To a lot of high-quality content, such as the Bohai Sea, Dream Tour, these games we have experienced in the Samsung GearVR platform in advance, the score is high.
In terms of application experience, Xiaomi put up dozens of applications in such a short time. First, thanks to the development of the underlying sdk, the second is closely linked with some high-quality platform developers and carried out game transplants. This has more channels and technical advantages than other domestic VR start-up platforms. Of course, from the entire VR field, compared to Google or Samsung are still a very large distance, but Xiaomi company itself is the brand of large IP, I believe that with the support of rice flour, the rich content of the platform is a matter of time.
Product summary:
VR has been growing for four years since it revived in 2012. The development of smart phones has greatly promoted the entire market process. Xiaomi's VR performance, if compared with similar products, Samsung's gearvr scores 10 points, Xiaomi scored at least 8 points. The initial cooperation with Google Daydream gave birth to Xiaomi's 9-axis 3D motion sensor handle. Although the performance is not good, the time left for Xiaomi VR is enough while the market is still immature. The ergonomics and software algorithms have been fully integrated to achieve first-class standards. Of course, I believe that the video still has contempt for the audience of Xiaomi VR because the experience of mobile VR is not mature, such as lack of spatial positioning, somatosensory interaction, and general image quality. Some disadvantages, but the relatively mature technology of PC VR is expensive, but if you have a certain interest in VR this new technology, then 199 yuan Xiaomi VR is indeed worth the user to buy experience, and future space positioning and somatosensory will also be Support the development of mobile VR in the form of accessories.
In general, today's Xiaomi VR, whether it is hardware or software, can be compared to a fully-equipped sparrow, in line with the characteristics of current excellent VR products, although it still takes a long time of hardware debugging and platform rich, but it will not stop The real VR enthusiast experience is trying, and the real reason to stop consumers from buying is the immaturity of the entire VR market at this stage.
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