Google has defined the requirements for a Daydream VR device in the latest Compatibility Definition Document for Android. Displays must have at least 1080p resolution (with a strong recommendation of 1440p) between 4.7″ and 6″ diagonal. Refresh in VR mode must be 60Hz and response time (including grey to grey) has to be <=3ms and with persistence of less than 5ms (which favours AMOLEDs – Man. Ed.). A CPU core must be dedicated to VR and device implementations must support OpenGL ES 3.2 and Vulkan Hardware Level 0 and ‘should’ support Vulkan Hardware Level 1.
The device is expected to support H.264 video decoding at least 3840×2160 @ 30fps – 40Mbps (equivalent to 4 instances of 1920×1080 @ 30fps-10Mbps or dual instances of 1920×1080 @ 60fps-20Mbps), as well as HEVC and VP9, decoding at least 1920×1080 @ 30fps-10Mbps and ‘should be capable’ of decoding 3840×2160 @ 30fps-20Mbps (equivalent to four instances of 1920×1080 @ 30fps-5Mbps).
Lenovo’s Moto Z is the first non-Google phone to claim to be compatible. (Lenovo to launch Moto Z in Taiwan)
