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Device for detecting digital data bursts recurring in a digital-analogue multiplexed television signal

机译:用于检测数字模拟多路复用电视信号中重复出现的数字数据突发的装置

摘要

The device for detecting the location of bursts, applicable to MAC/PACKET signal receivers, comprises means (12) of detecting transitions and of detecting the presence of a sequence comprising in succession a period with duration equal to at least N1 T1 during which transitions spaced apart by at most N2 T1 have been observed, and a transitionless period with a duration at least equal to N3 T1. They emit a pulse on each detection (T1 being a specified time interval, of the same order of magnitude as the bit period). Validation means (22-40) count the pulses emitted during a time window locked onto the first pulse, for a duration greater than that of the useful lines of a frame and check whether the number of pulses is greater than a predetermined value. IMAGE
机译:适用于MAC / PACKET信号接收器的用于检测脉冲串位置的设备包括检测转换并检测序列的存在的装置(12),该序列连续包含至少等于N1 T1的持续时间,在此期间转换间隔观察到相距最多N2 T1,并且持续时间至少等于N3 T1的无过渡期。它们在每次检测时发出一个脉冲(T1是指定的时间间隔,与位周期的数量级相同)。验证装置(22-40)对锁定在第一脉冲上的时间窗期间发射的脉冲进行计数,其持续时间大于帧的有用线的持续时间,并检查脉冲数是否大于预定值。 <图像>

著录项

  • 公开/公告号EP0461978B1

    专利类型

  • 公开/公告日1995-05-03

    原文格式PDF

  • 申请/专利权人 FRANCE TELECOM;

    申请/专利号EP19910401519

  • 发明设计人 BOUVIER JACKY;REMY MICHEL;

    申请日1991-06-10

  • 分类号H04N7/00;

  • 国家 EP

  • 入库时间 2022-08-22 04:13:48

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