A FEED-FORWARD DYNAMIC VDD-VBB-FREQUENCY MANAGEMENT FOR LOW POWER MOTION VIDEO COMPRESSION ON 90NM RISC PROCESSOR

摘要

This paper proposes a feed-forward dynamic voltage frequency management (FFDM) method for minimum-power motion video compression. Employing both minimum-power voltage-frequency conditions and the nature of workload fluctuations for MPEG4 encoding, the FFDM method effectively reduces the total power dissipation of software MPEG4 encoding. The FFDM method uses cooperative control of supply voltage, operating frequency and body bias voltage according to the workload predicted by forward analysis, which is also described. Simulation results indicate that the FFDM method can reduce power dissipation by 65% to 80%, depending on sequence activities.