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The arm has introduced an open-source solution to improve graphics scaling on mobile devices. The solution promises to bring PC-quality gaming experiences to smartphones while optimizing performance and power consumption.
Arm Accuracy Super Resolution (Arm ASR) is a temporal converter that combines information from multiple frames to generate high-quality images from lower resolution targets. This approach allows game developers to render graphics at lower resolutions and then upscale them, resulting in significant performance improvements without sacrificing visual quality.
The company’s decision to develop a temporal upscaler was driven by the need to address common graphics performance challenges in mobile games.
Arm derived its solution from AMD’s FidelityFX Super Resolution 2 (FSR2), the impressive open source project that has proven itself in the PC and console gaming markets. By adapting this technology to mobile devices, Arm aims to provide developers with a familiar API and configuration options.
To demonstrate Arm ASR’s capabilities, the company conducted tests using a commercial mobile device equipped with an Arm Immortalis-G720 GPU with a display resolution of 2800×1260. The results showed substantial improvements in GPU performance compared to rendering at native resolution:
It is important to note that the scaling technique allowed for high-quality rendering at stable and low temperatures, avoiding thermal throttling issues that can negatively impact the user experience during extended gaming sessions.
“Scaling is the process of rendering certain steps of the image at a lower resolution and then later applying the technique to go from a lower resolution to a higher resolution,” Arm explained.
“It shouldn’t be used at every stage of rendering an image, as it can lead to unsightly glitches when rendering full-screen effects or user interfaces. However, earlier in the pipeline it can be used very effectively and provide anti-aliasing as part of the process.”
The performance improvements achieved by Arm ASR translate directly into power savings, a crucial factor for mobile gaming.
Working with MediaTek, Arm validated these power savings using a Dimensity 9300 handset, demonstrating significant reductions in power consumption compared to native rendering at full resolution:
Arm’s gaming content team also applied ASR technology to its “Mori” demo, an Unreal Engine project designed to challenge future mobile GPUs. The results demonstrated the converter’s ability to preserve fine details while improving performance, using Robust Contrast-Adaptive Sharpening (RCAS) technology to further improve image quality.
In keeping with the open source spirit of projects like AMD’s GPUOpen, Arm has decided to release Arm ASR under an MIT open source license. This move allows developers to freely access the technology and experiment with it in their own projects, potentially accelerating the adoption of high-quality scaling in mobile gaming.
The release of Arm ASR represents a significant advancement in mobile graphics technology, providing developers with a powerful tool to optimize their games for performance and power efficiency without compromising visual quality.
As the mobile gaming industry continues to push the boundaries of what is possible on handheld devices, solutions like Arm ASR will play a critical role in delivering immersive gaming experiences to gamers around the world.
(Photo by Dean Ryland)
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