ESC-DVS: Dynamic Voltage Scaling Using Entropy-Based Scene Change Detection for AMOLED Displays

摘要

Active matrix organic light emitting diode (AMOLED) displays are widely used in the displays of mobile devices. Whereas the display power accounts for a large portion of the total power of a mobile device, the computing power and battery size are limited. Thus, technologies for minimizing the computing overheads while reducing the power during video processing are important in mobile devices. In this paper, we propose a novel dynamic voltage scaling (DVS) method called ESC-DVS by designing low-overhead entropy-based scene change detection for video playback on mobile AMOLED displays. Its implementation using an MPEG4/H.264 player on an embedded board with a real mobile AMOLED display shows a power saving of 21.31% on average and higher accuracy compared to an existing power-saving scene change detection technique. In addition, the computing overhead decreases to 1/84 compared to an existing DVS technique while good human visual satisfaction is achieved.