PURPOSE: A method for dynamically adjusting a CPU voltage when an h/264/svc moving picture is reproduced is provided to lower a voltage applied to a CPU during a moving picture is reproduced and reduce decoding time. CONSTITUTION: A score about image quality of each video segment is assigned. A candidate group of frequencies is selected when a frame is reproduced to reproduce an image of the lowest time resolution set in each video segment based on the decoding prediction time if a k-numbered frequency of a next frame. The lowest frequency is calculated from the candidate group. A CPU voltage is adjusted based on the calculated frequency.
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