| 发明名称 | Signal processing apparatus and signal processing method | ||
| 摘要 | Digital signals with higher resolution are generated from dual-phase encode signals indicating phase changes of a position or an angle of a target. A signal processing apparatus for processing dual-phase encode signals indicating changes in position of a target, comprises: a first noise reduction unit configured to remove high frequency noise from each of the dual-phase encode signals before interpolation processing; an interpolating unit configured to apply interpolation processing to the dual-phase encode signals output from the first noise reduction unit to generate dual-phase encode signals with higher resolution; and a second noise reduction unit configured to remove noise from the dual-phase encode signals output from the interpolating unit. | ||
| 申请公布号 | US8872565(B2) | 申请公布日期 | 2014.10.28 |
| 申请号 | US201313889760 | 申请日期 | 2013.05.08 |
| 申请人 | Canon Kabushiki Kaisha | 发明人 | Kawamura Koji |
| 分类号 | G06F1/04;H03K5/1252 | 主分类号 | G06F1/04 |
| 代理机构 | Fitzpatrick, Cella, Harper & Scinto | 代理人 | Fitzpatrick, Cella, Harper & Scinto |
| 主权项 | 1. A signal processing apparatus for processing dual-phase encode signals indicating changes in position of a target, comprising: a first noise reduction unit configured to remove high frequency noise from each of the dual-phase encode signals before interpolation processing; an interpolating unit configured to apply interpolation processing to the dual-phase interpolation signals output from said first noise reduction unit to generate dual-phase encode signals with higher resolution; and a second noise reduction unit configured to remove noise from the dual-phase interpolation signals output from said interpolating unit on the basis of the pulse interval of the dual-phase interpolation signals. | ||
| 地址 | Tokyo JP | ||