| 摘要 |
<p>PURPOSE:To detect the out-of-synchronism of a reception signal in a short time and accurately in a reception device receiving a digital signal of a multi- frame constitution in which frame discrimination data is inserted each frame. CONSTITUTION:The out-of-synchronism detector is provided with a coincidence decision means 11, a change decision means 12 and an out-of-synchronism decision means 13 and decides the coincidence of frame discrimination data FID and an expected value each frame. In addition to it, the detector decides the normality of the changes of the frame discrimination data and decides as the out-of-synchronism when at least one of 'a noncoincidence' and 'an abnormality' occurs.</p> |
