发明名称 |
Digital demodulation device and synchronization detecting method |
摘要 |
A synchronization error occurs when a DTV signal is distorted on a transmission path and this deteriorates demodulation capability. The digital demodulation device and the synchronization detecting method of the invention can correct the synchronization position when determining that a synchronization error has occurred. A controller receives a center tap coefficient, for example, from a waveform equalizer and compares the coefficient with a given center tap coefficient threshold. If the coefficient is smaller than the threshold, the controller determines that a synchronization detector has made a synchronization error and outputs a control signal. The synchronization detector receiving the control signal re-detects a sync signal included in a received signal, to detect a new correct sync signal and thus correct the synchronization error.
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申请公布号 |
US2003161423(A1) |
申请公布日期 |
2003.08.28 |
申请号 |
US20030342218 |
申请日期 |
2003.01.15 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD |
发明人 |
SATOMI TOSHIYUKI;TOKUNAGA NAOYA;KONISHI TAKAAKI;KATO HISAYA |
分类号 |
H04N5/08;H04L7/02;H04L7/06;H04L7/08;H04L27/01;H04N5/21;H04N5/44;H04N5/455;(IPC1-7):H04B1/10 |
主分类号 |
H04N5/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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