发明名称 |
Multi-stage lookup for translating between signals of different bit lengths |
摘要 |
A method and apparatus is provided for translating an L-bit put signal to a W-bit output signal such as a virtual network identification signal to an internal virtual network signal. The translation is performed using a multi-stage lookup. The input signal is portioned into a plurality of subsets of bits. A first index to a first stage is provided by combining a portion of bits and a first delta subset of bits. A second index to a second stage is provided by combining data stored at the first index in the first stage and the a second delta subset of bits. The corresponding output signal is stored at the last index in the last stage. The use of the multi-stage lookup instead of a single-stage lookup reduces the memory required to perform the translation.
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申请公布号 |
US6420982(B1) |
申请公布日期 |
2002.07.16 |
申请号 |
US20010022932 |
申请日期 |
2001.12.18 |
申请人 |
MOSAID TECHNOLOGIES, INC. |
发明人 |
BROWN DAVID A. |
分类号 |
H04L12/46;H04L12/56;(IPC1-7):H03M7/00 |
主分类号 |
H04L12/46 |
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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