发明名称 |
Method for coding digital data using vector quantizing techniques and device for implementing said method. |
摘要 |
<p>The present invention provides a vector quantization encoder which comprises a codebook built with the so-called Linde-Buzo-Gray (LBG) algorithm, an intermediary codebook built from the initial codebook (LBG) and a Hash-table containing subsets of the initial codebook (LBG). Vector quantization is then performed in two steps. First, a multistep prequantization of an input vector gives an index in the Hash-table which points to a subset of vectors of the initial codebook (LBG). Then a full search is performed within the pointed subset of vectors of the initial codebook (LBG). <IMAGE></p> |
申请公布号 |
EP0576765(A1) |
申请公布日期 |
1994.01.05 |
申请号 |
EP19920480097 |
申请日期 |
1992.06.30 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
GOUBAULT, ERIC;LANCON, EMMANUEL, RESIDENCE CLAIREFONTAINE;MENEZ, JEAN;RAIMONDO, CATHERINE |
分类号 |
G06T9/00;H03M7/30;(IPC1-7):H04N7/13 |
主分类号 |
G06T9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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