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FM TELETEXT MULTIPLEX BROADCAST RECEIVER
FM TELETEXT MULTIPLEX BROADCAST RECEIVER
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机译:FM电视多路广播接收机
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摘要
PROBLEM TO BE SOLVED: To reduce and prevent a defect in the case that out of synchronism takes place between a block number of received data and an output of a frame block counter of the receiver by providing an output of an abnormality processing signal when types of packets differ based on the discrimination by a synchronization detection signal and a count means. ;SOLUTION: Based on a timing signal generated by a frame block counter 6, a frame synchronization discrimination circuit 5 detects a change point of a BIC given from a BIC detection circuit 2 to discriminate a frame synchronization state. A D/P error-discrimination circuit 8 detects a defect due to misdiscrimination of a data packet and a parity packet caused by deviation in packets resulting from an output of the frame block counter 6 and mis-count of received data. Then a packet deviation discrimination circuit 10 compares the content stored in a D/P error history storage circuit 9 with a predetermined bit deviation discrimination pattern. When the both are unequal, a fault state is discriminated.;COPYRIGHT: (C)1997,JPO
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机译:要解决的问题:在以下情况下,通过提供异常处理信号的输出来减少和防止在接收数据的块数与接收机的帧块计数器的输出之间发生不同步的情况下的缺陷。分组根据同步检测信号和计数装置的鉴别而不同。 ;解决方案:基于帧块计数器6产生的定时信号,帧同步判别电路5检测从BIC检测电路2给出的BIC的变化点,以判别帧同步状态。 D / P错误鉴别电路8检测由于帧分组计数器6的输出和接收数据的错误计数所引起的数据包的偏差所引起的数据分组和奇偶校验分组的错误鉴别所引起的缺陷。然后,分组偏差鉴别电路10将存储在D / P错误历史存储电路9中的内容与预定的比特偏差鉴别模式进行比较。当两者不相等时,就判别出故障状态。;版权:(C)1997,JPO
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