| 摘要: | 在數位多媒體通訊蓬勃發展的時代，行動通訊裝置是每個人必備的物品，甚至有些人同時擁有多種行動通訊裝置。這些裝置有些會附帶有相機和錄影機的功能，較高檔的行動通訊裝置就能提供較好的照相和錄影功能，普通的行動裝置雖然也能提供，但拍照和錄影的品質就不會很好。 本論文實現一個類似手機的攝影系統，我們使用的是壓縮品質較好的H.264影像壓縮標準，在手機上面的電池容量是有限的，為了能夠在電池電量下降時，也能完整的錄製影片，所以我們提出一個Power Aware的設計概念，依現在電池電量做為參考，選擇不同的省電模式去錄製影片，使我們可以完整的錄製影片。除了提出Power Aware的設計概念外，我們將整個系統實現在一個由ARM926EJS處理器和Xilinx Virtex5 220的FPGA組成的開發平台上，藉由軟硬體整合的方式實現整個適應性功率消耗影像壓縮系統。在軟體改善方面能提升12倍以上的效能，有效的資料排程降低軟硬體雙方等待時間，有效的Power Aware設計方法，可根據目前殘存的電容量，執行相對應的省電模式。 In era when the multimedia communication of digit is vigorous, the action communicator is everybody's indispensable article; even some people have many kinds of actions communicators at the same time. Some of the devices will have the functions of cameras and video cassette recorder by the way, the more top-grade action communicator can offer the better taking pictures and making video recording function, though ordinary action device can be offered, the quality of taking a picture and making video recording would not be very good. This thesis wants to realize a mobile phone -like photography system, what we used is to compress H.264 image with better quality and compress the standard, battery on mobile phone capacity limited, for can be when the electric consumption of the battery drop, the recording film that can be intact too, so we put forward the design concept of one Power Aware, as consulting in accordance with the electric consumption of the battery of now, choose different electric ways of province to record and produce the film, recording film making us intact. Besides putting forward the design concept of Power Aware, we realize the whole system on a developing platform composed of ARM926EJS processor and FPGA of Xilinx Virtex5 220, the way to combine with the software and hardware realizes the power consumption image of whole adaptability compresses the system. We software improve, can improve 12 more than efficiency, effective materials arrange Cheng reducing waiting time of both sides of software and hardware, effective Power Aware design method, can carry out the corresponding electric way of province according to different capacitance. |
