Arm’s Mali-D77 Display Processor Targets Virtual-Reality Apps

May 28, 2019 Alix Paultre

The Arm Mali-D77 display processor IP serves head-mounted displays (HMD) in VR applications, and is optimized for 3K120. The Mali-D77 enables offloading of specific compute functions from GPU to DPU, improving visuals and significantly reducing motion sickness, as well as freeing up more GPU cycles and associated system bandwidth.

Other capabilities include Lens Distortion Correction (LDC), which pre-distorts images to counter lens effects when they are viewed through any VR headset, Chromatic Aberration Correction (CAC), which pre-separates the color channels in the opposite direction in order to counteract the blurring effect caused by the lenses of the VR headset, Asynchronous Timewarp (ATW), which translates and re-projects the virtual scene based on the head pose and position of the headset in the 3D space.

The Mali-D77 offers up to a 40 percent reduction in bandwidth, and up to 12 percent power savings for VR workloads, enabling higher quality visuals while freeing up GPU cycles. The Mali-D77 can be integrated into a common SoC platform with existing developer ecosystems, for switching across multiple devices such as a VR HMD to LCD/OLED capable of displaying 4K HDR scenes.

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