Ju-Ho Sohn

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The real time 3D graphics becomes one of the attractive applications for 3G wireless terminals although their battery lifetime and memory bandwidth limit the system resources for graphics processing. Instead of using the dedicated hardware engine with complex functions, we propose an efficient hardware architecture of low power vertex shader with(More)
The optimal architecture of personal digital assistants (PDA) system for real-time 3D graphics was analyzed by simulating the 3D applications on the various Advanced RISC Machines (ARM) processor platforms. Simulation results show that for 256x256 screen resolution, even the performance of 200MHz StrongARM with 160MHz floating point unit (FPU) shows only(More)
A low-power graphics LSI is designed and implemented for mobile multimedia applications. The LSI contains a 32bit RISC processor with enhanced MAC, a 3D rendering engine, programmable power optimizer, and 29Mb embedded DRAM. Full 3D graphics pipeline featuring 264Mtexels/s texture-mapped 3D graphics as well as 2D MPEG-4 video decoding can be realized while(More)
— A 3D computer graphics (3DCG) library with energy-efficient cache architecture is implemented for mobile multimedia systems. The developed library is based on fixed-point arithmetic for low energy consumption. To achieve high performance, the library is optimized at both of the assembly and the algorithm levels on 3 different Advanced RISC Machines (ARM)(More)
In this research, a fixed-point multimedia co-processor is designed and tested into an ARM-10 based mobile graphics processor for portable 2-D and 3-D multimedia applications. The fixed-point co-processor architecture with dual operations realizes advanced 3-D graphics algorithms and various streaming multimedia functions in a single hardware while(More)
A s the mobile-electronics market grows, third-generation terminals such as smart cell phones and personal multimedia players are becoming popular. Because users carry mobile devices all the time, they want them to have more func-tionality, and many mobile devices now employ multimedia functions. 1 Digital cameras and real-time audio playback are common,(More)
We present a low power multimedia SoC with fully programmable 3D graphics, MPEG4 codec, H.264 decoder and JPEG codec for mobile devices. The unified shader in 3D graphics engine provides fully programmable 3D graphics with 35% area and 28% power reduction. Logarithmic lighting engine and the specialized lighting instruction enable 9.1Mvertices/s vertex(More)
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