发明名称 |
METHOD AND CIRCUIT APPARATUS FOR DETECTING AND REPLACING SYNCHRONOUS WORD IN PCM DATA |
摘要 |
A first counter operating at the PCM sampling frequency counts out the normal minimum period between successive synchronization words in the data stream. In a following "window" the detection of another synchronization word produces a check signal and in all other cases a provisional check signal. In such other case the data for the next period are marked as dubious. A second counter counts out twice the minimum normal interval between synchronization words and in a following "window", the appearance of a synchronization word produces a verification signal. The occurrence of a verification signal one normal interval after a provisional check signal removes the marking of intervening data as "dubious". If no verification signal is then produced, the intervening data are marked and treated as erroneous. |
申请公布号 |
JPS63220478(A) |
申请公布日期 |
1988.09.13 |
申请号 |
JP19870314342 |
申请日期 |
1987.12.14 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
YOOZEFU ZOHOORU;BUERUNAA SHIYUTAUDE |
分类号 |
H04L7/08;G11B20/10;G11B20/12;G11B27/30;H04L7/04 |
主分类号 |
H04L7/08 |
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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