| 摘要 |
A wavelet transform filter for filtering an input data signal comprises: ```a first subtractor 1101 for subtracting a pair of low-pass coefficients y 0 (0), y 0 (2), to produce a first result; ```a second substractor 1104 for subtracting a first input based on the first result from a high-pass coefficient y 1 (0) produce a second result; ```a first adder 1105 for adding the second result to a second input based on a low-pass coefficient y 0 (1) to produce a third result; ```a third subtractor 1106 for subtracting the second result from the second input based on the low-pass coefficient y 0 (1) to produce a fourth result; wherein filter outputs a first sample x(2) based on the third result and a second sample x(3) based on the fourth result. |
