Abstract: A demodulation system for use in a vestigial sideband system of an over-modulation type including a sampler for sampling a reduced carrier frequency component from a received modulated wave to be used for demodulation. A discriminator is operative to detect a vertical synchronizing signal portion in a vertical blanking period and thereupon to actuate the sampler, causing a carrier burst signal to build up. The carrier burst signal is subjected to filtering to derive a carrier wave which is supplied to a demodulator. A synchronizing pulse separator is connected to the demodulator to separate horizontal synchronizing pulses from a demodulated output, which pulses are fed back to the sampler to actuate it during the absence of the vertical synchronizing signal.