System for transmitting signals via a record carrier in the form of a tape

Claim 1

A system for transmitting signals via a record carrier in the form of a tape, on which said signals are, or have been, recorded in mutually parallel tracks which are inclined relative to the longitudinal axis of the record carrier and which have a nominal pitch d, by means of an apparatus which comprises a rotary-head arrangement having two pairs of heads which are disposed substantially diametrically opposite one another, characterized in that one of the two pairs of heads comprises a first head and a second head which, when viewed in a direction transverse to the tracks, are situated at such a distance from each other that two tracks are recorded at a distance nd from each other substantially simultaneously, n being a positive or negative odd integer, and the other of the two pairs of heads comprises a third head and a fourth head which, when viewed in a direction transverse to the tracks, are situated at such a distance form each other that two tracks are recorded at a distance nd from each other substantially simultaneously, one pair of heads being so arranged relative to the other pair of heads that the first head and the third head, as well as the second head and the fourth head, alternately record tracks which are situated at a distance (2+m)d from each other when the record carrier is driven at a nominal driving speed, m being a positive or negative quadruple, including zero, and the nominal driving speed of the record carrier being such that for each revolution of the rotary-head arrangement, the record carrier is moved over a distance occupied by four tracks, the first head and the second head are together arranged on a first electromechanical transducer for moving said heads substantially in a direction transverse to the track direction, the third head and the fourth head are together arranged on a second electromechanical transducer for moving said heads substantially in a direction transverse to the track direction, during recording of signals, a first signal of a first frequency is applied to the first head and a second signal of a second frequency is applied to the third head, said first and said second frequency being so low that during read-out, these signals produce crosstalk in heads which follow an adjacent track, and during reproduction, signals of the first frequency and the second frequency are extracted from the signals read by the second head and the fourth head and are utilized for the generation of tracking signals for controlling the first and the second electromechanical transducers.

Claim 2

A system for transmitting signals via a record carrier in the form of a tape, on which said signals are, or have been, recorded in mutually parallel tracks which are inclined relative to the longitudinal axis of the record carrier and which have a nominal pitch d, by means of an apparatus which comprises a rotary-head arrangement having two pairs of heads which are disposed substantially diametrically opposite one another, characterized in that one of the two pairs of heads comprises a first head and a second head which, when viewed in a direction transverse to the tracks, are situated at such a distance from each other that two tracks are recorded at a distance nd from each other substantially simultaneously, n being a positive or negative odd integer, and the other of the two pairs of heads comprises a third head and a fourth head which, when viewed in a direction transverse to the tracks, are situated at such a distance form each other that two tracks are recorded at a distance nd from each other substantially simultaneously, one pair of heads being so arranged relative to the other pair of heads that the first head and the third head, as well as the second head and the fourth head, alternately record tracks which are situated at a distance (2+m)d from each other when the record carrier is driven at a nominal driving speed, m being a positive or negative quadruple, including zero, and the nominal driving speed of the record carrier being such that for each revolution of the rotary-head arrangement, the record carrier is moved over a distance occupied by four tracks, the first head and the second head are together arranged on a first electromechanical transducer for moving said heads substantially in a direction transverse to the track direction, the third head and the fourth head are together arranged on a second electromechanical transducer for moving said heads substantially in a direction transverse to the track direction, during recording of signals, a first signal of a first frequency is applied to the first head and a second signal of a second frequency is applied to the third head, said first and said second frequency being so low that during read-out, these signals produce crosstalk in heads which follow an adjacent track, and during reproduction, signals of the first frequency and the second frequency are extracted from the signals read by the second head and the fourth head and are utilized for the generation of tracking signals for controlling the first and the second electromechanical transducers.