NDLI: J. Cho et al.: A Combined Approach for QoS-Guaranteed and Low-Power Video Decoding 651 A Combined Approach for QoS-Guaranteed and Low-Power Video Decoding

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J. Cho et al.: A Combined Approach for QoS-Guaranteed and Low-Power Video Decoding 651 A Combined Approach for QoS-Guaranteed and Low-Power Video Decoding

Content Provider	CiteSeerX
Author	Kim, Dae-Young Cho, Ilyong Lee, Ben Cho, Jinsung
Abstract	Abstract This paper proposes a power management technique for video playback in mobile multimedia devices, which combines low-power video decoding and QoS-guaranteed algorithms: ILI (Interval-based Linear Interpolation) and QLB (QoS-guaranteed and Low-power Buffering). First, the proposed ILI algorithm precisely estimates the decoding time of video frames through interval-based linear interpolation. Second, the QLB algorithm has two modes of operation, and dynamically switches between the modes based on feedback of decoding statistics of recent frames. The combinations ILI and QLB algorithms allow the CPU voltage and clock frequency to be adjusted to the optimal setting. Our extensive experiments show that the proposed approach can achieve about 4.8%-13.7% more power savings compared with existing methods 1. right shows the ideal case where the processor scales exactly to the voltage/frequency setting required for the desired time span. Therefore, no idle time exists and power saving is maximized. Although DVFS can be applied to any application, it is especially beneficial for video decoding because of its high computational and power requirements and frame variability [9]. Although there have been many related research efforts, lowpower video decoding has yet to be implemented on mobile multimedia devices such as smartphones. Index Terms low-power video decoding, DVFS, workload
File Format	PDF
Access Restriction	Open
Subject Keyword	Interval-based Linear Interpolation Video Playback Clock Frequency Research Effort Video Frame Video Decoding Mobile Multimedia Device Desired Time Span Idle Time Exists Frame Variability Power Requirement Voltage Frequency Setting Power Management Technique Low-power Video Decoding Index Term Recent Frame Extensive Experiment Combined Approach Qlb Algorithm Cpu Voltage Qos-guaranteed Algorithm Ideal Case Low-power Buffering High Computational Power Saving Optimal Setting Decoding Time Combination Ili
Content Type	Text
Resource Type	Article

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