Method and apparatus for recording digital signals medium for recording digital signals and method

An apparatus for recording a digital signal, comprising:

• first conversion means for combining an input bit sequence, which has a bit interval Pw and an interval of n.times.Pw to m.times.Pw (n<m;
• n and m=integers) of transition points between bit 0 and bit 1, with predetermined frequency characteristics, thereby obtaining a first signal retaining information of the interval of the bit transition points;
• second conversion means for combining said first signal output from said first conversion means with equalizing characteristics of an output signal reproduced by a reproducing pickup, thereby producing a second signal including jitters;
• third conversion means for saturation-amplifying said second signal output from said second conversion means and converting the saturation-amplified signal to a bit sequence which is a binary signal, thereby obtaining a recording signal whereby equalization of a reproduced signal is not needed;
• and
• recording means for recording the recording signal on a recording medium.

A method of transmitting a digital signal, the method comprising:

• combining an input bit sequence, which has a bit interval Pw and an interval of n.times.Pw to m.times.Pw (n<m;
• n and m=integers) of transition points between bit 0 and bit 1, with predetermined frequency characteristics, thereby producing a first signal retaining information of the interval of the bit transition points;
• combining said first signal with equalizing characteristics of an output signal from a reception-side high-frequency reception unit, thereby producing a second signal including jitters;
• and
• saturation-amplifying said second signal and converting the saturation-amplified signal to a bit sequence which is a binary signal, thereby obtaining a transmission signal, whereby equalization of a reproduced signal is not needed.

An apparatus for transmitting a digital signal, comprising:

• first means for combining an input bit sequence, which has a bit interval Pw and an interval of n.times.Pw to m.times.Pw (n<m;
• and n and m=integers) of transition points between bit 0 and bit 1, with predetermined frequency characteristics, thereby obtaining a first signal retaining information of the interval of the bit transition points;
• second means for combining said first signal output with equalizing characteristics of an output signal from a reception-side high-frequency reception unit, thereby producing a second signal including jitters;
• and
• third means for saturation-amplifying said second signal and converting the saturation-amplified signal to a bit sequence which is a binary signal, thereby obtaining a transmission signal, whereby equalization of a reproduced signal is not needed.