Design and implementation for partition dynamically vector quantization chip
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 2...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2009-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74652286/ |
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| Summary: | 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. |
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| ISSN: | 1000-436X |