Title :
Image sensor with focal plane change event driven video compression
Author :
Chi, Yu M. ; Cummings, Ralph Etienne ; Cauwenberghs, Gert
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of California, La Jolla, CA
Abstract :
An image sensor with focal plane based hardware acceleration of video compression is presented. The 90 x 90 pixel CMOS image sensor provides in-pixel professing of intensity changes, serving as an analog memory and processor for temporal image difference computation. Surveillance quality videos of up to a 48:1 compression ratio via a temporally compensated DCT based compression algorithm is attained with just an 18.5 MHz micro-controller. Power consumption is 225 mW during full operation and 6mVV during full sleep mode that continuously monitors for change events to trigger encoding.
Keywords :
CMOS image sensors; data compression; microcontrollers; video coding; CMOS image sensor; DCT; hardware acceleration; image difference; microcontroller; power consumption; video compression; Acceleration; Analog computers; Analog memory; CMOS image sensors; Hardware; Image coding; Image sensors; Pixel; Surveillance; Video compression;
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
DOI :
10.1109/ISCAS.2008.4541804
