The Study of Low Power and Human Computer Interaction for Smart Handheld Multimedia Communication Devices
Date Issued
2007
Date
2007
Author(s)
Chen, Hung-Ming
DOI
en-US
Abstract
The demand for embedded handheld multimedia communication devices is large and growing rapidly. However, there are many obstacles during the design of a multimedia and network-enabled embedded handheld device with highly integral chip, high performance CPU, large screen, high-resolution display, wireless-connected capabilities and large capacity. The obstacles include considerably power and performance demanding and usability etc. Power consumption will greatly affect the usage time for the users to operate these applications. Thus, the design for low power system becomes the main consideration on those devices. In addition, user-friendly applications will improve the usability on such devices. Hence, the design of intuitive software on such device is a key to success on applied domains. Furthermore, due to the expectation of high performance applications such as video encoding/decoding from users, researches of reducing the computational complexity and memory are required.
In this dissertation, there are two types of embedded handheld multimedia communication are developed. One is the embedded tablet and portable media player (PMP). And, the obstacles during the design of the above two types of device will be addressed.
Then, a configurable platform design for power management has been proposed to enable flexible power schemes on designing different user scenarios and application domains. The methodology considers from the circuit design stage to dynamic power management with various hardware/software co-design issues. Next, a process of user-centered design is practiced on the tablet as an assistant device and PMP for a pleasant user interface. Also, there are the human computer interaction (HCI) methods of heuristic evaluation and usability testing to validating the design of the user interface. Also, some novel software are presented to support the configurable user interface.
Furthermore, to optimize the video design, a modified block matching algorithm is proposed to reduce the computational complexity by changing search range dynamically.
Subjects
手持式
多媒體通信
平板裝置
可攜式多媒體播放器
動態電源管理
人機介面
使用者中心設計
硬碟
嵌入式系統
無線網路測試儀
區塊比對法
動態移動估測
數位視訊
Handheld
Multimedia Communication
Tablet
Portable Media Player
Dynamic Power Management
Human Computer Interaction
User Centered Design
Hard-disk
Embedded system
Wireless Test Analyzer
Block Matching Algorithm
Motion Estimation
Digital Video
Type
thesis
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