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A 195 mW/152 mW Mobile Multimedia SoC With Fully Programmable 3-D Graphics and MPEG4/H.264/JPEG
本文介绍了一款低功耗多媒体SoC，支持全可编程3D图形和多种视频编解码，适用于移动设备。
0.13μm CMOS, 152mW (视频应用), 195mW (3D图形应用), 9.1Mvertices/s顶点填充率
低功耗多媒体SoC3D图形MPEG4JPEG
▸全可编程3D图形管线：采用移动统一着色器技术，实现完全可编程的3D图形管线，相比传统方案减少35%的芯片面积和28%的功耗，显著提升了能效比。
▸低功耗光照引擎：引入对数数据路径和专用光照指令，实现9.1 Mvertices/s的顶点填充率，性能较之前工作提升2.5倍，同时优化了光照计算的功耗效率。
▸JPEG/MPEG4合并编解码器：通过硬件共享和算法优化，将JPEG和MPEG4编解码功能集成到单一模块中，减少硅面积占用，支持高效的多媒体处理。
▸低功耗SoC设计：整体SoC在视频应用中功耗低于152 mW，在3D图形应用中功耗低于195 mW，采用0.13μm CMOS工艺实现6.4 mm×6.4 mm的小尺寸封装，适合移动设备应用。
Abstract
In this paper, we present a low power multimedia SoC with fully programmable 3-D graphics, MPEG4 codec, H.264 decoder, and JPEG codec for mobile devices. The mobile unified shader in 3-D graphics engine provides fully programmable 3-D graphics pipeline with 35% area and 28% power reduction. Low power lighting engine which employs logarithmic number data- path and the specialized lighting instruction enable 9.1 Mvertices/s vertex fill rate, which is 2.5 times improvement compared with previous works including transformations and OpenGL lighting. The SoC consumes less than 152 mW for video applications and less than 195 mW for 3-D graphics applications. The mobile unified shader and merged JPEG/MPEG4 codec reduce the silicon area and the SoC consumes 6.4 mm 6.4 mm in 0.13 m CMOS logic process.