Title :
Low power motion compensation block IP with embedded DRAM macro for portable multimedia applications
Author :
Chi-Weon Yoon ; Jeonghoon Kook ; Ramchan Woo ; Se-Joong Lee ; Kangmin Lee ; Hoi-Jun Yoo
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
Abstract :
A 16.3 mW low power motion compensation (MC) block IP with 1.25 Mbit embedded DRAM macro is implemented using 0.18 /spl mu/m EML technology for portable video applications. For low power consumption, its frequency is lowered to 20 MHz by utilizing parallelism in datapath. Embedded DRAM frame buffer eliminates external data I/O. In addition, distributed nine-tiled mapping (DNTM) with partial activation scheme reduces power for accessing the frame buffer up to 31% compared to conventional 1-bank tiled mapping. Adaptive fetch control (AFC) in data buffer reduces power up to 29% by eliminating unnecessary switching in datapath.
Keywords :
data compression; industrial property; large scale integration; low-power electronics; mobile computing; motion compensation; multimedia computing; random-access storage; video codecs; 0.18 micron; 1.25 Mbit; 16.3 mW; 20 MHz; DRAM frame buffer; EML technology; adaptive fetch control; block IP; data buffer; datapath switching; distributed nine-tiled mapping; embedded DRAM macro; frame buffer; low power electronics; motion compensation; partial activation scheme; portable multimedia applications; Circuits; Computer buffers; Decoding; Energy consumption; Frequency; MPEG 4 Standard; Motion compensation; Multimedia systems; Random access memory; Video compression;
Conference_Titel :
VLSI Circuits, 2001. Digest of Technical Papers. 2001 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
4-89114-014-3
DOI :
10.1109/VLSIC.2001.934207
