Title :
Design rule for frequency-voltage cooperative power control and its application to an MPEG-4 decoder
Author :
Aisaka, K. ; Aritsuka, T. ; Misaka, S. ; Toyama, K. ; Uchiyama, K. ; Ishibashi, K. ; Kawaguchi, H. ; Sakurai, T.
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
Abstract :
Frequency-voltage cooperative power control (FVC) is considered a powerful method to reduce the power consumption of a program, because it utilizes the information of software loads dynamically. The authors first show through a mathematical analysis that FVC with only two frequency-voltage sets is sufficient for current low-Vdd CPU chips. Then we show an experimental result that FVC feedback control on an MPEG-4 video decoder can reduce the power to one-fourth.
Keywords :
VLSI; circuit feedback; decoding; digital signal processing chips; low-power electronics; video signal processing; FVC; MPEG-4 decoder; VLSI; feedback control; frequency-voltage cooperative power control; frequency-voltage sets; low-voltage CPU chips; software loads; video decoder; Circuits; Clocks; Collaborative software; Decoding; Energy consumption; Frequency; Large scale integration; MPEG 4 Standard; Power control; Voltage;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2002. Symposium on
Conference_Location :
Honolulu, HI, USA
Print_ISBN :
0-7803-7310-3
DOI :
10.1109/VLSIC.2002.1015088
