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