B/W adaptive image grabber with analog motion vector estimator at 0.3GOPS

Video coding standards such as H261 and MPEG-1&2 are based on digital pulse code modulation image compression with motion compensation to reduce transmission bit-rate. A modified scheme is presented which uses two analog memories to compare consecutive frames. Good speed and power performance is...

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Bibliographic Details
Main Authors: Tomasini, Alfredo, Brattoli, Maddalena, Chioffi, Ernestina, Colli, Gianluca, Gerna, Danilo, Pasotti, Marco
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:Video coding standards such as H261 and MPEG-1&2 are based on digital pulse code modulation image compression with motion compensation to reduce transmission bit-rate. A modified scheme is presented which uses two analog memories to compare consecutive frames. Good speed and power performance is obtained with only 0.5dB loss in S/N ratio. A H261-compatible bit stream can be produced to interface with H261 decoders. The chip contains a B/W CMOS adaptive video-camera providing quarter common interface format (176x144pels), two analog memories, a motion estimator, and a small controller to synchronize computational phases.
ISSN:0193-6530
DOI:10.1109/ISSCC.1996.488528