| 摘要 |
A signal storage processor ( 101 ) stores signals input from a signal input unit ( 100 ) in a buffer ( 102 ) for respective lines. A vertical discrete wavelet transformer ( 103 ) reads out an index value L from the signal storage processor ( 101 ), and obtains a reference address B from the value L. If L=2, B=2. If L=4, B=0. Furthermore, the vertical discrete wavelet transformer ( 103 ) reads out the i-th column of sets of data, which are stored in the buffer ( 102 ) and are continuous in the vertical direction (i.e., data read out from four addresses (addresses in the buffer ( 102 )) ix4+B, ix4+mod((B+1),4), ix4+mod((B+2),4), and ix4+mod((B+3),4)), and computes the one-dimensional discrete wavelet transforms of the readout data.
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