Today, with the release of Daydream View, Google finally released the "Android 7.0 Compatibility Definition Document", which clearly released the compatibility definition file for Android 7.0 Nougat. This document is for fast charging of hardware devices, Vulkan API, multi-window. The new features and other content have made a lot of regulations, the document is 85 pages long.
Android 7.0 Nougat is the operating system of the Daydream platform, and the importance is self-evident. The latest release of the "Android 7.0 Compatibility Definition Document" also covers some of the Daydream-ready mobile phone hardware standards:
â–² There must be at least 2 physical cores.
â–² Must support continuous performance mode.
â–² Must support Vulkan hardware level 0 and should support Vulkan hardware level 1.
â–² Must support at least 3840&TImes; 2160@30fps-40Mbps H.264 decoding.
▲ Must support HEVC and VP9, ​​must support at least 1920 & TImes; 1080@30 fps-10Mbps decoding, and should be able to support 3840&TImes; 2160@30fps-20Mbps decoding (equivalent to 4 1920 & TImes; 1080@30fps-5Mbps)
â–²It is strongly recommended to support the android.hardware.sensor.hifi_sensors function and must meet the requirements of android.hardware.hifi_sensors for gyroscopes, accelerometers and magnetometers.
â–² low power Bluetooth 4.0
â–² display size between 4.7-6 inches
â–² At least 1080p, 60Hz screen resolution, and no more than 3ms delay and no more than 5ms of visual persistence effect
â–²Support OpenGL ES 3.2 and Vulkan API
â–² can decode two 60FPS video instances at the same time
â–² stable output frame rate 60FPS and real-time rendering
â–² temperature sensor capable of reading the surface temperature of the device
Xiaobian perspective:
Although Android 7.0 Nougat is the operating system of the Daydream platform, Xiaobian reminds everyone that mobile phones that support Android 7.0 Nougat may not be able to run the Daydream platform!
The Android 7.0 system is just a framework for the Daydream platform - you want to run the Daydream platform, which is a prerequisite but not the only condition.
Next, let's talk about this Android® Compatibility Definition Document, which hardware requirements will be available on the new generation mobile VR platform Daydream.
In this Android 7.0 Nougat requirement, Google requires that its resolution be at least Full HD (1080p), and it is strongly recommended to quadruple HD (1440p) or higher. In other words, 1080P is just a pass line that must be reached.
Although the requirements of Android 7.0 Nougat do not explicitly point out that OLED screens are required, only the OLED screen can meet this requirement in combination with the screen delay requirements specified in the requirements. As for running the Daydream platform, the devices that currently support Daydream are Pixel/Pixel XL and Mate9 are all OLED screens.
On the processor side, Android 7.0 Nougat is not very demanding on the processor. The Nexus 6 equipped with the Snapdragon 805 can also upgrade Android 7.0 Nougat, and even some mobile phones equipped with Snapdragon 410 have also been upgraded by Android 7.0 Nougat.
But it is not easy to support the Daydream platform. At present, Qualcomm has confirmed that only Qualcomm Xiaolong 821 supports the Daydream platform. As a result, most of the flagship phones equipped with the Snapdragon 820, including the previously announced support for Daydream's ZTE 7 (Axon 7), must "cry in the toilet".
Although Android 7.0 Nougat has many requirements for hardware, there are not a few mobile phones that can upgrade the Android 7.0 Nougat system. But the mobile phones that want to reach the Daydream-ready standard are rare. Some of the more popular flagship models such as the Snapdragon 820 version of the Samsung Galaxy S7/S7 edge and the Axon 7 mentioned above are difficult to meet. Daydream hardware requirements.
For VR users who want to experience the Daydream platform, Xiaobian recommends that after Daydream View is officially released, consider whether to purchase the device based on the compatibility of the actual machine test.
On the whole, in fact, Google has long wanted to unify the hardware standards of mobile Android devices, but it seems that there is always a lack of suitable opportunities. The development of VR technology and the popularity of mobile VR in the past two years have undoubtedly given Google an excellent opportunity to know that the prototype Cardboard of the earliest VR mobile phone box is vacated by Google. Now Android 7.0 Nougat is the best proof of the hardware requirements of VR and the release of Daydream View. Google’s move, for major mobile phone manufacturers, seems to be tied to Google’s “super warship†in the future.
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