Sub-information separating apparatus

Details Sub-information separating apparatus Sub-information separating apparatus

H - Electricity

03

M

354/67

H03M 7/30 (2006.01) H03M 13/00 (2006.01)

Patent

CA 1256213

Abstract of the Disclosure A sub-information separating apparatus is arranged at a receiving side in a transmission system for sending a signal obtained such that a sub-information signal is superposed on a main signal by using coded mark inversion coding rule violation. The apparatus has a CMI decoding converter, a pulse width stretching circuit and a sub-information separating circuit. The CMI decoding converter converts an input CMI signal to an original main signal and separates a CMI coding rule violation pulse from the input CMI signal. The pulse width stretching circuit stretches the pulse width of the CMI coding rule violation pulse. The sub-information separating circuit separates the sub-information signal from the pulse-width stretched CMI coding rule violation pulse.

499560

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