Partition dynamically vector quantization（PDVQ） chip was researched and produced to encode images.Before encoding

it first judged the correlation of the encoding image block

and then decided to choose the size of the image blocks.Test result shows that PDVQ chip can improve the compression rate to 27% in average by contrasting with the normal VQ

even to 64%.The size of the codebook in PDVQ chip was 256×16 byte

and all codevectors in the codebook were categorized by direction

in each category codebook codewords were sorted in the ascending order of their sum

this kind codebook architecture could reduce search range largely.The VLSI architecture of PDVQ chip was implemented based on Charter 0.35μm CMOS standard cell technology

its chip area was 2.08mm×2.08mm.Test result shows that

at 3.0V power supply

PDVQ chip can operate up to 100MHz.At this operation

its power dissipation is 295mW

and it can support real-time encoding application for 512×512 gray images at 30fame/s.