The test vectors of some sub-scan chains generate by controllable LFSR when these chains only need to update test vector and do not need to shift out test responses.

当某个子扫描链的测试向量需要更新且又不需要移出其测试响应时，其测试向量由可控LFSR产生。

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A gray-level image is decomposed into a 3-D image sequences by sub-sample of zigzag scan which are transformed using 3-D SWT.

首先，通过之字扫描把灰度图像分解为3维的图像序列，然后使用3-D SWT变换这些图像序列。

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