Analysis and Implementation of Power-Aware H.264 Decoding for Android OpenCORE on Heterogeneous Multicore Platform

• Main Authors: Li-ChiunChen, 陳立群
• Other Authors: Yueh-Min Huang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/24965115073210678339

碩士 === 國立成功大學 === 工程科學系碩博士班 === 98 === In recent years, more and more mobile devices choose Android as their OS. Because of this open source project, developers get a free environment to do anything. Moreover, to meet the growing requirement for multimedia playback, Android’s OpenCORE multimedia framework also provides a great base for development. In addition, to deal with multimedia processing, some mobile devices may contain DSP to enhance performance. For such kinds of battery-driven devices, power saving is always an interesting issue. In this case, if we can integrate DVFS (Dynamic Voltage and Frequency Scaling) with video decoding to dynamically adjust suitable voltage and frequency according to processor’s loading, more energy could be saved. Thus the battery can come with better performance and make the product more competitive. This thesis first describes how to add support for Dual DSP H.264 decoding for Android OpenCORE on heterogeneous multicore platform PAC Duo SoC. Then it proposes a DVFS mechanism for the decoding flow according to its characteristics, verifies and analyzes this mechanism for its performance on energy reduction on parallel video decoding.