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發佈日期 2017-05-16
公告標題 1060522專班seminar演講資訊
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時間:106年05月22 日(星期一)


地點:大仁樓200301教室


主持人:張宏慶老師


演講者:台灣科技大學 電子工程系 呂政修教授


演講題目:Energy Efficient Streaming for Smartphone by Video Adaptation

                    and Backlight Control


演講摘要:Smartphone becomes an indispensable gadget in our daily life.         

                    Prolonging battery life on smartphone can extend the usability

                    of the phone without being recharged, especially for accessing

                    streaming video, which is a paramount service in the mobile

                    Internet era. Many researchers have proposed energy effi- cient

                    streaming methods, including bandwidth control and packet

                    scheduling. Such studies have focused on reducing the energy 
                    consumption of central processing units (CPUs) and wireless  

                    networks; however, screens may drain substantial energy on 

                    smartphone. In this study, an energy efficient streaming 
                    system is proposed, combining adaptive coding and a backlight   

                    control mechanism. A non-parametric signal prediction is used to 

                    predict the network condition and then some adaptive encoding 

                    parameters are subsequently adjusted to fit the network capability. 
                    A histogram equalization is applied to compensate for the loss of 

                    image contrast after reducing the backlight. To validate the proposed

                    concept, some ex- periments were conducted and the corresponding

                    results show that the proposed streaming system can effectively 

                    reduce energy consumption on smartphone, while accessing the 

                    video streaming service.