| 摘要 |
PURPOSE:To reduce a crosstalk component of a digital data signal which is leaked and recorded in a voice channel by applying the digital data signal to a sound signal through a reverse characteristic circuit having a characteristic equivalent to the reverse characteristic of a crosstalk characteristic generated due to leaked magnetic flux between recording heads. CONSTITUTION:It is supported that a head 1 is sound signal reproducing head and a head 5 is a digital signal reproducing head, a waveform (a) is obtained from the output of an equalizer/pre-amplifier 6. Since the leakage of the magnetic flux between the heads is increased in proportion to the frequency level, the same waveform is obtained by passing a digital data reproduced signal through a high-pass filter 12 and a phase shifter 13. When the waveform is properly attenuated by an attenuator 14, passed through a phase inverter 15 and then applied to an adder 16, the applied signal offsets the signal of a waveform (b) which is originally recorded in the sound channel as a crosstalk and then reproduced, so that the crosstalk component is not almost included in the reproduced sound outputted from a speaker 4. |
