公开(公告)号：US4905101A

公开(公告)日：1990-02-27

申请号：US216416

申请日：1988-07-07

申请人： Haruo Ohta ,  Tokikazu Matsumoto

发明人： Haruo Ohta ,  Tokikazu Matsumoto

IPC分类号： H04N5/95

CPC分类号： H04N5/95

摘要： A disclosed time base corrector comprises a clock generater for generating a clock signal whose period is fixed, an analog-to-digital converter for sampling amplitude values of an input analog signal having a time base error at sampling points given by the clock signal, an adaptive interpolation filter for interpolating a correct amplitude value at a resampling indicated by a resampling position signal, a resampling position signal producing circuit for detecting the time base error and producing from the detected error the resampling position signal, and a digital-to-analog converter for converting the interpolated amplitude values to an analog signal which has no time base errors. The time base correction is implemented by pure digital signal processing without any analog signal processing. The time base corrector does not use such a clock signal that has time base fluctuations.