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A 41 mW VGA@30 fps Quadtree Video Encoder for Video Surveillance Systems
Qin LIU Seiichiro HIRATSUKA Kazunori SHIMIZU Shinsuke USHIKI Satoshi GOTO Takeshi IKENAGA
IEICE TRANSACTIONS on Electronics
Publication Date: 2008/04/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Advanced Technologies in Digital LSIs and Memories)
video surveillance system, motion estimation, ME-MC processor, quadtree, low power consumption,
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Video surveillance systems have a huge market, as indicated by the number of installed cameras, particularly for low-power systems. In this paper, we propose a low-power quadtree video encoder for video surveillance systems. It features a low-complexity motion estimation algorithm, an application-specific ME-MC processor, a dedicated quadtree encoder engine and a processor control-based clock-gating technique. A chip capable of encoding 30 fps VGA (640480) at 80 MHz is fabricated using 0.18 µm CMOS technology. A total of 153 K gates with 558 kbits SRAM have been integrated into a 5.0 mm3.5 mm die. The power consumption is 40.87 mW at 80 MHz for VGA at 30 fps and 1.97 mW at 3.3 MHz for QCIF at 15 fps.