| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 99 === Since Google released Android source code in 2007, on the market, Android based product implementation has increased rapidly on digital converged devices such as mobile phone, set-box, etc. Obviously Android System development is broadly attracting ICT industry sectors, as in the future, Android will keep continue its domination on embedded system technology.
This study proposed an Android/DVSDK platform by embedding Android version 2.1 on TI OMAP-3530 and designing a Multimedia service system based on Digital Signal Processor. It achieves two main functions simultaneously: a high quality multimedia service and power saving control mechanism to extend hand-held device life-time simultaneously for multimedia streaming server application.
On the implementation, this study combines Android System, Digital Video SDK module and 0xlab release Android open source code base on the OMAP-3530 hardware platform specification to modify parameters and implement Embedded Android/DVSDK Multimedia System. Through Digital Signal Processor, the decoding process is enhanced effectively to provide user a high-quality multimedia service. Meanwhile by the increment of Multimedia service accessed by mobile devices, power management issue became important. Respond to that issue, this study enables Dynamic Voltage and Frequency Scaling power control mechanism in Android/DVSDK architecture. This mechanism enables CPU Frequency adjustment to reduce devices power consumption depends on system state. Through the proposed Android/DVSDK Platform, the multimedia services frame rate is increased from 24 Frame Per Second to 28 Frame Per Second and achieves the mitigation power consumption by 1.5%.
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