Method and device for measuring the relative displacement between binary signals corresponding to information recorded on the different tracks of a kinematic magnetic storage device

Claim 1

A method for measuring and adjusting the relative displacement between binary signals corresponding to information recorded on the different tracks of a kinematic magnetic storage device, wherein use is made of a reference track and the relative displaycement between the binary signals contained in said track and those contained in each of the other tracks is measured by carrying out the following operations on each set of two tracks: - shaping said binary signals, - producing a signal A which represents both in magnitude and in sign the relative displacement in time between the two signals, - producing a signal N which is generated only if the two signals which have previously been shaped coexist correspond to pulses having At least a partial and common existance in time, - measuring and storing the time-duration of the signal A, - totalizing said time-duration corresponding to each of only those measurements for which a signal N was generated, - dividing the total time-duration by the number of measurements in which the signal N is present, - storing the quotient resulting from said dividing, said quotient representing the mean relative displacement between the recordings on the two tracks under comparison, - correcting for the mean relative displacement which is thus measured.

Claim 2

A method for measuring and adjusting the relative displacement between binary signals corresponding to information recorded on the different tracks of a kinematic magnetic storage device, wherein use is made of a reference track and the relative displaycement between the binary signals contained in said track and those contained in each of the other tracks is measured by carrying out the following operations on each set of two tracks: - shaping said binary signals, - producing a signal A which represents both in magnitude and in sign the relative displacement in time between the two signals, - producing a signal N which is generated only if the two signals which have previously been shaped coexist correspond to pulses having At least a partial and common existance in time, - measuring and storing the time-duration of the signal A, - totalizing said time-duration corresponding to each of only those measurements for which a signal N was generated, - dividing the total time-duration by the number of measurements in which the signal N is present, - storing the quotient resulting from said dividing, said quotient representing the mean relative displacement between the recordings on the two tracks under comparison, - correcting for the mean relative displacement which is thus measured.

Claim 4

A device for adjusting the relative displacement between binary signals corresponding to the information recorded on the different tracks of a kinematic magnetic storage device comprising: - means for shaping the binary signals corresponding to two recording tracks which deliver the corresponding shaped signals E1 and E2, - means for gating said signals and delivering the signals N1, N2 and R, N1 which exist if E1 exists, the signal N2 which exists if E2 exists, the leading edges of each pulse of the signals N1 and N2 being intended to have the same relative displacement as the trailing edges of the corresponding pulses of the signals E1 and E2 and also to have common trailing edges, the leading edge of each pulse of the signal R being later in time than the leading edges of the signals N1 and N2 whilst its trailing edge is later in time than that of N1 and N2, - a counting logic circuit comprising means for generating a signal L1 which exists if N1 and N2 are present simultaneously, a signal L2 which exists if one of the signals N1 and N2 is present and which is later in time than L1, a signal E having a width which is proportional to the distance between the leading edges of N1 and N2 and a signal D which represents the order of appearance of the signals N1 and N2 and the leading edge of which coincides with that of the signal E, - a main binary counter which counts the pulses delivered by a recurrent-signal generator during the period of the signal E and in which the direction of counting is imposed by the signal D, - a main storage device which is connected to the outputs of the main binary counter and the access of which is controlled by the signal L1, the signal L2 being intended to reload the main counter to the value possessed by the storage device at the time of the previous measurement, each output of the storage device being fed back to the corresponding input of the main counter, - a secondary counter whose input is driven by the signal L1 and preset at a value M, said counter being intended to emit the output signal C when it has counted M pulses of the signal L1, - a divider for dividing by the number M, the input of which is connected to the output of the main storage device and the output of which drives the input of a secondary storage device whose control input is in turn driven by the delayed signal C, - a correction system controlled by said secondary storage device applying in the recorded-information reading circuit a time-delay which is equal to the delay recorded by the secondary storage device.

Claim 5

A device for adjusting the relative displacement between binary signals corresponding to the information recorded on the different tracks of a kinematic magnetic storage device comprising: - means for shaping the binary signals corresponding to two recording tracks which deliver the corresponding shaped signals E1 and E2, - means for gating said signals and delivering the signals N1, N2 and R, N1 which exist if E1 exists, the signal N2 which exists if E2 exists, the leading edges of each pulse of the signals N1 and N2 being intended to have the same relative displacement as the trailing edges of the corresponding pulses of the signals E1 and E2 and also to have common trailing edges, the leading edge of each pulse of the signal R being later in time than the leading edges of the signals N1 and N2 whilst its trailing edge is later in time than that of N1 and N2, - a counting logic circuit comprising means for generating a signal L1 which exists if N1 and N2 are present simultaneously, a signal L2 which exists if one of the signals N1 and N2 is present and which is later in time than L1, a signal E having a width which is proportional to the distance between the leading edges of N1 and N2 and a signal D which represents the order of appearance of the signals N1 and N2 and the leading edge of which coincides with that of the signal E, - a main binary counter which counts the pulses delivered by a recurrent-signal generator during the period of the signal E and in which the direction of counting is imposed by the signal D, - a main storage device which is connected to the outputs of the main binary counter and the access of which is controlled by the signal L1, the signal L2 being intended to reload the main counter to the value possessed by the storage device at the time of the previous measurement, each output of the storage device being fed back to the corresponding input of the main counter, - a secondary counter whose input is driven by the signal L1 and preset at a value M, said counter being intended to emit the output signal C when it has counted M pulses of the signal L1, - a divider for dividing by the number M, the input of which is connected to the output of the main storage device and the output of which drives the input of a secondary storage device whose control input is in turn driven by the delayed signal C, - a correction system controlled by said secondary storage device applying in the recorded-information reading circuit a time-delay which is equal to the delay recorded by the secondary storage device.