| 摘要 |
A digital filter is provided to reduce unnecessary power consumption by performing an operation with precision suitable a condition of a filter process. A digital filter includes a coefficient storing device(200) storing a filter coefficient multiplying to a process object signal of a filter process or a filter coefficient which is multiplied to a signal generating in a filter processing process. A coefficient re-record controlling device(401) adjusts a re-record of the filter coefficient stored at the coefficient storing device. An operation device performs an operation to perform the filter process using the filter coefficient stored at the coefficient storing device to the process object signal. A filter process control device(402) controls the operation performed by the operation device. |
