FR2562702A1 - ELECTRONIC RECORDING OR REPRODUCING APPARATUS FOR CONSUMERS - Google Patents

Abstract

THE INVENTION RELATES TO AN AUDIO-VIDEO RECORDING OR REPRODUCTION APPARATUS, SUCH AS A VCR OR VCR. THE APPARATUS INCLUDES A PULSE GENERATOR 23 CONTROLLED BY THE ROTATION OF A WINDING SPINDLE 2, 3 ON WHICH THE CORRESPONDING COIL IS PLACED, A DEVICE FOR MEASURING 24 THE ROTATION SPEED OF THE WINDING SPINDLE, A PROCESSOR CIRCUIT FOR PRODUCING DATA FOR MARKING THE POSITIONS OF THE MAGNETIC BAND, AND A DISPLAY FOR DISPLAYING THE POSITIONS MARKED ON THE TAPE; THE PROCESSOR CIRCUIT 27 INCLUDES A FIRST 28 AND A SECOND 29 PROGRAMMING CIRCUIT, THE FIRST PROGRAMMING CIRCUIT 28 BEING ON ONLY DURING THE SUPPLY OF A CONTROL SIGNAL BY A CONTROL CIRCUIT 10, CONNECTED TO A CONTROL INPUT 33 OF THE FIRST PROGRAMMING CIRCUIT USED TO ADJUST THE BAND SPEED AND WHICH PRODUCES THE CONTROL SIGNAL ONLY WHEN THE MAGNETIC BAND IS DRIVEN AT A PREDETERMINED SPEED, AND THE OPERATION OF THE SECOND PROGRAMMING CIRCUIT 29 IS BLOCKED AS LONG AS THE PRE-EXECUTION OF THE PROGRAM PROGRAMMING CIRCUIT TAKES PLACE IN THE PROCESSOR CIRCUIT 27.

Description

The present invention relates to an apparatus for

  recording or electronic reproduction for the general public comprising: a magnetic tape wound on reels and of a defined length for recording audio or video information, - a pulse generator controlled by the rotation of a

  winding spindle on which is placed the spool cor-

  - a measuring device placed after the pulse generator to measure the speed of rotation of the winding spindle,

  a processor circuit for determining a location data

  to locate the corresponding position on the magnetic strip, from the data provided by the

  measuring device and defining the rotational speed

  winding spindle, and - a display to display the tape position based on

  on the location data provided by the pro circuit

cessor.

  Such recording or reproducing apparatus

  particularly tape recorders or video recorders,

  include as indicating devices, for the purpose of

  the respective position of the magnetic tape introduced

  in the apparatus, either a mechanical counter or an electronic tape running counter which represents, either on meter wheels with decades, or on a display, an indication or display in the form of a number corresponding to the number turns of the capstan causing the magnetic tape. From this tape running counter display, conclusions can be drawn as to the length of tape that has been consumed in the apparatus, provided that the counter has been zeroed at the beginning of the tape. A VHS recorder

  using an electronic meter display of

  For example, according to the technical magazine "Funkschau", 1982, No. 9, page 75. With this type of tape is known.

  particular apparatus, the electronic

  Tape is automatically reset when inserting a tape cassette. Based on the bandwidth value represented on the display, the user can draw conclusions as to the position of the magnetic stripe, i.e., the length of tape that has already past the recording or playback head of the device, or the remaining tape length

  available for recording or reproduction.

  With such an indication or display, the desired position of the magnetic tape can be established relatively easily. However, tape running times or even a remaining tape length can only be determined in a difficult way

  and circumstantial by the user of such apparatus.

  To overcome this difficulty, a reel-type cassette recorder apparatus, known from the technical journal "Funkschau" 1983, No. 6, page 44, is provided with a so-called real-time counting mechanism. , indicating the length of tape that has already been consumed inside the device, in real time - in hours and minutes -. In order to display in real time, a guide roller of the magnetic tape contains a pulse generator whose output pulses are converted into time values and are applied to a counting module. The display of the

  meter of the conventional recorder is only

  made active when the capstan motor has reached its rated speed. However, if the real-time display must be the same as the actual running time of the magnetic tape in the conventional recording apparatus, it is necessary that the time counter

  real is always reset at the beginning of the magnetic strip.

  When the magnetic tape is introduced into the

  As a conventional recorder in a position between the beginning and the end of the band, it is necessary, in order to adjust the counter in real time, to return the band each time to its initial position. In the case of long magnetic tapes, this may constitute,

  under certain circumstances, a fairly long operation.

  A video recorder of the type indicated at the beginning of this text, which is also known from H. Bahr's Philips Manual "Alles Hber Video",

  1980, and in particular pages 181 to 183, contains an

  meter that is controlled by a processor.

  In order to display the tape position in the conventional VCR, a pulse signal indicating the number of turns of the receiver coil is produced by a pulse generator which is connected to the coil.

  receiver and is applied to the processor.

  An object of the invention is to create a device

  registration or reproduction of the type defined above.

  above, in such a way that it determines the actual position of the band, in particular by means of a real time display, also in cases where the magnetic strip

  has not been previously brought back to the original position.

  According to the invention, this object is realized in that - the processor circuit contains a first programming circuit for calculating and transmitting the data.

  relating to the position of the magnetic strip at

  firing cd the data of the measuring device for measuring the rotational speed of the winding spindle, and from a datum defining the speed of the winding spindle;

  magnetic tape, as well as a second programming circuit

  using, from the data

  last calculated and stored, the tape position and the running direction of the magnetic tape that has been stored in a memory of

  scroll direction, for each successive pulse

  of the pulse generator of the winding spindle

  connected to a clock input of the second programming circuit, the new data representing the band position associated with the pulse are calculated and are kept available at the data output of the processor circuit,

  in that the first programming circuit is

  latched only during the supply of a control signal by a control circuit, connected to a control input of the first programming circuit for adjusting the tape speed and which produces

  the control signal only when the magnetic tape

  tick is driven at a predetermined speed, and in that the operation of the second

  programming is blocked as long as the

  The programming of the first programming circuit takes place in the processor circuit. The measures to be taken in accordance with the invention require only light

  additions to a recording or reproducing apparatus

  of the type mentioned above. In particular, a

  special computer gram is only necessary in

  the processor. Introducing a second routine program

  which is linked to the background part - of the first computer program, one obtains additionally

  the considerable advantage that the position of the

  is also displayed during fast unwinding or rewinding, during which the

  tape is not pulled at a close speed

  written. In the case of magnetic tapes having very long running times, for example several hours, it is desirable to know approximately the respective momentary position of the band also during the

  fast unwinding or fast rewinding.

  Otherwise, the user of the apparatus has to control the apparatus from time to time to obtain a band run at a constant speed, so as to determine the momentary position of the band. This process is very long and circumstantial. However, by taking the measurements in accordance with the invention, the desired tape position can be found very precisely and set in a simple manner during fast unwinding or fast rewinding. According to another particularity of the invention, four computer programs are introduced in the

  processor and these computer programs are

  dice by a pulse generator of the receiver coil as well as by a pulse generator of the supply coil, which offers the additional advantage that

  the place to be provided for memorizing the four pro-

  computer grams is much smaller than the square

  in memory for the two computer programs.

  which are only controlled by the pulse generator of a single coil. In addition, the real-time display is more accurate, since the real time is each time only determined up to half

  the reception volume of the coils, and the fact that

  real-time display decreases accuracy as

the reception volume increases.

  Other features and advantages of the

  will be highlighted in the rest of the

  Cription, given by way of non-limiting example, with reference to the accompanying drawings in which: - Figure 1 is a block diagram of a circuit

  to indicate (display) the position of a magnetic tape

  which is introduced into a recording or reproducing apparatus, and - Figure 2 is a block diagram of another circuit for indicating (displaying) the position of a band.

  which is introduced in a recording device

or reproduction.

  Figures 1 and 2 each show a block diagram of a display circuit of the position of a magnetic tape 1 which is introduced into a recording or reproducing apparatus. In the block diagrams of FIGS. 1 and 2, identical elements are

  designated by the same symbols or numerical references.

  The magnetic tape is wound on two coils one of which is placed on the right or receiver winding spindle 2 while the other is placed on the left winding spool or the third spool pin. The two winding spindles are each trained by a

  respective engine 4 or 5. The magnetic tape 1 is trans-

  carried by a capstan 6, against which a pinch roller

  7, shown schematically in the drawing, is applied so that the magnetic strip 1 passes between the axis 6 and the roller 7 being driven by a motor 8. The capstan motor is connected to a pulse generator 9. The output signals of the latter are

  applied to a control circuit 10 ensuring the regular

  the capstan motor 8 at a prescribed rotational speed which is established in the control circuit, in a manner not particularly described by means of a control device 11. As long as the capstan 6 is turned the prescribed speed of rotation, the control circuit produces at its output 12 a signal identifying or indicating that the apparatus is in

  state to operate at rated speed.

  Through the various switches 13 to 17 of the control device 11 of the recorder

  magnetic tape, the different operating conditions

  the magnetic tape recorder or states can be adjusted. For example, the switch 13 (PLAY) is provided for a recording operation or normal reproduction of the apparatus. An associated normal operating circuit 19 produces at an output 18 a signal representing the rotational speed of the capstan 6 for the operation

  normal recording or reproduction. Interactions

  switches 14 (CUE) and 17 (REVIEW) are provided for triggering the fast unwinding and rapid rewinding operations. The associated control circuits 21, when engaged, produce at an output 22 a signal representing the increased rotational speed of the capstan for that particular operating condition. By means of the switches 15 and 16, the rapid uncoiling (SVL) or fast rewinding (SRL) operations are started, during which the

  capstan 6 is not in contact with the magnetic tape.

  During the fast unwinding operation, the motor 4

  the winding spindle turns the spool

  trice at a high speed of rotation; during the

  fast winding, the 5-pin winding spindle motor spins the supply or feed coil 3 to

a high speed of rotation.

  In the example corresponding to the mode of

  As shown in FIG. 1, the spindle motor 4 driving the take-up spool 2 simultaneously drives a pulse generator 23 which produces a signal having a pulse frequency which is proportional to the speed of rotation of the take-up spool. The

  output signal of the pulse generator 23 is

  plicated to a measuring device 24 for measuring

  the speed of rotation and whose output signal con-

  titue the data representing the rotational speed measured.

  In addition, the measuring device 24 is connected to the outputs of a tape-start detector 25 and an end-of-tape detector 26, which serve to detect the beginning and the end.

  magnetic tape and produce in the

  tif of measurement 24 the output signals representing the

  beginning and end of the band. In the example of realizing

  In the present invention, the measuring device is part of a processor 27 containing a programming circuit 28 associated with a first computer program RP2 and a programming circuit 29 associated with a second computer program RP2, and which contains furthermore, a tape position memory 30 for storing the data relating to the BP band position which is defined by the programming circuits 28 or 29, and a direction-of-scroll memory 31 for storing the scrolling direction LR of the magnetic tape during the previous operation

  of the recording or reproducing apparatus.

  The BP data representing the tape position and stored in the memory 30 are transmitted to an optical display device which displays the position

  bandwidth in terms of hours and minutes

  both tape scroll time still available.

  The computer program RP1 of the circuit 28 is designed such that the programming circuit 28

  determines, from the data provided by the

  measuring device 24 and data relating to the speed of the magnetic tape and which are provided by the outputs 18 or 22 of the control device 11, a respective band position data corresponding to the rotational speed of the receiver coil 2 , provided that the output signal produced at the

  output 12 of the control circuit 10 at the nominal speed

  4 of the programming circuit 28. From the data provided by the programming circuit 28 and data provided by a band length indication circuit 34, which is connected to the processor and analyzes, for example, the specified total length of the magnetic tape contained in the cassette and transmits this data to represent said length, the processor determines the data relating to the position of the magnetic tape in the form time

  remaining tape scroll for the operation

  registration or reproduction of the device.

  In addition, the signal in the form of pulses

  both of the pulse generator 23 of the receiver coil

  trice 2 is applied to the input of the programming circuit

  29 associated with the RP2 computer program and whose input is connected to the clock input 35 of the processor. The second computer program RP2 of the programming circuit 29 is designed so that each

  impulse applied to the input 36 of the programming circuit

  29 is associated with a position of the

  gnetic, which is a function of the tape position BP stored in the tape position memory 30, and which differs therefrom from the transport value of the magnetic tape in the scrolling direction, which is stored in the tape memory. scrolling direction 31, between two successive pulses appearing at

  the input 36 of the programming circuit 29 in the opera-

  registration or reproduction. The tape position data thus determined by the programming circuit 29 are processed by the processor of

  in the same way as the data determined by the

  programmed 28, and they are stored in

  the tape position memory 30 in order to display them

  chage. In this way, also during the

  fast swimming or fast rewinding, the position of the magnetic tape is displayed (indicated) continuously on the recording or reproducing head 37 of the apparatus. As a result, the person using the apparatus can therefore be aware of the position of the magnetic strip at any time

  during the entire rapid unwinding or rewinding

  speed of the magnetic stripe, and it can

  instructing the apparatus into the recording condition or the reproducing condition when the desired band position is reached, without having to perform other switching operations to set the band position reached during the operation unwinding. fast or fast rewind. In the example described, the programming circuit 29 corresponding to the second computer program RP2 is always switched on when the control circuit 10 does not produce a signal at its output 12. Whenever the video recorder shown in FIG.

  when it is switched on or when it is in-

  troduction of a cassette, for executing a fast unwinding or fast rewinding operation, and without any other operating condition having been previously ordered and without the tape

  magnet is immobilized in an outboard position

  relative to the beginning or end of the tape, the tape position memory 30 does not contain any tape position data, so that the programming circuit 29 is unable to determine a tape position data. For this reason, the control unit or device 11, for example, contains a trigger device 40 which, in response to a trigger signal, produces at its output 69, only during a few turns of the receiver coil 2, either recording state is the reproduction state. The activation time of this trigger circuit is set to have a duration such that the capstan motor 8 reaches the speed

  rotation required to perform the operation of

  registration or reproduction, and that the circuit of

256270Z

  programming-28 be able to determine the given

  relating to a particular position of the band.

  In the example under consideration, the trip signal is produced by means of a trip key 42 which, when the power supply SV is connected, and via a control contact 43 closed by the inserted magnetic strip, provides a supply voltage, serving as a trigger signal, to

  the input 41 of the trigger device 40.

  In another embodiment, the control unit or device 11 comprises,

  as shown in FIG. 1, a triggering device

  Block 44 having a switchable memory circuit 45. This memory circuit controls two switches 46 and 47 in the control circuitry.

  fast uncoiling and fast rewinding 48 and 49.

  In the activation position S of the memory circuit 45, the control devices 46 and 47 establish the search scrolling operational state corresponding to the respective scrolling direction, when the respective operational state of fast unwinding or

  fast rewinding is established by means of switching

  selectors 15 or 16. When the power supply is

  rant SV is established when inserting the magnetic tape, or when inserting a tape

  in the recording or recording apparatus

  production in operation, during which the control contact 43 is closed, an activation signal is produced by a pulse shaper 50 which makes

  to pass the memory circuit 45 into the position of ac-

  tivation and which, prior to the subsequent execution of fast retrieval or fast rewind using switches 15 or 16, ensures the setting of the device in the corresponding search scrolling operational state. As soon as it appears at the output 12 of the control circuit 10 a signal indicating that the capstan 6 is rotating at the specified rotational speed, this signal switches, via a delay circuit 51, the switchable memory circuit 45 in the reset position. In this way, the memory circuit 45 ensures, using the devices of

  command 46 or 47, a switching of the

  recording or reproduction in the respective operational state of fast winding or rewinding

  which has been pre-selected by means of

  15 or 16. The delay time of the delay circuit

  51 is therefore chosen so that the position of the magnetic tape can be determined

  in a safe manner in the programming circuit 28.

  The exemplary embodiment of a circuit for displaying the position of a magnetic tape inserted in a

  recording or reproducing apparatus

  2 to the block diagram of FIG. 2 differs from the embodiment shown in FIG. 1 essentially in that the motor 5 of the supply reel 3 additionally controls a pulse generator 52. its output a signal whose pulse frequency is proportional to the speed of rotation of the supply reel 3. In correspondence, the processor 53 of

  the embodiment of FIG. 2 is designed differently

  The impulse generator 52 of the supply spool 3 is similarly associated with a measuring device 54 for measuring the speed of the embodiment of FIG.

  rotation of the supply reel 3. The output of the cir-

  cooked measuring 24 serving to provide data

  relating to the speed of rotation of the reel

  trice 2 is, on the one hand, to a data input 55 of a programming circuit portion 28a associated with the

  RPla computer program and, on the other hand, to a

  data output 56 of a control device 57, while the output of the measuring device 54 serving to provide data relating to the rotational speed of the supply reel 3 is connected on the one hand, to the data input 58 of the programming circuit portion 28b associated with the computer program RP1b and, secondly, to a data input 59 of the control device. The computer program RPla of the first programming circuit portion 28a is used to calculate and transmit the position data

  band relating to the first half of the

  the magnetic tape 1 as the web winding on the take-up reel 2 progresses in the case of a running direction towards the end of the magnetic tape; the computer program RPlb of the second programming circuit portion 28b is for calculating and outputting the tape position data relating to the second half of the total length of the magnetic tape when decreasing the tape length wound on the supply reel 3 in the case of a scroll direction oriented towards the end of the strip. A validation input 60 of the control device 57 is connected to the output 12 of the control circuit 10 of the capstan 6 so that an output signal appearing at the output 17 of the control circuit 10 puts the control device 57 into operation. In this operating condition, the control device 57 compares the output data of the two measuring devices 24 and 54 and produces an execution sequence signal at the enable input 61a or 61b of the circuit portion. 28a or 28b corresponding to the coil 2 or 3 for which the

  measuring circuit 24 or 54 associated with this coil four-

  denotes a datum corresponding to a rotation speed which is equal to or greater than the rotational speed of the coils in the position of the magnetic tape which is located at the center of the total length of said web. In addition, an output 62 of the control device is connected to a state memory in which the switching of the circuit part of the circuit has been memorized.

  programming 28a or the circuit portion of pro-

  grammar 28b in the operating condition.

  When programming circuit parts

  28a or 28b have not been switched to the condition of

  tivity - and therefore when, in the example considered, the control circuit 10 for adjusting the rotation speed of the capstan 6 does not produce a validation signal at its output 12 - then, in the state

  interlocking device of the reproduction device or

  registration, the programming circuit portions 29a or 29b are switched to the activity condition

  basically according to the memory condition

  which has been found in the state memory 63.

  If, for example, it has been found previously that the programming circuit portion 28a was switched

  in the condition of activity, and if this condition of

  tivity is stored in the state memory 63, the state memory is now switching the circuit of

  programming 29a in the activity condition.

  The two programming circuit portions 29a and 29b are represented as having clock inputs 64a and 64b which are respectively connected to the output

  signal of the pulse generator 23 or 52 respectively.

  2. The two programming circuit portions 29a and 29b each contain a computer program RP2a and RP2b, the computer program RP2a corresponding to the computer program RP2 of the programming circuit. 29 of the embodiment of Figure 1 which is related to the first half of the length of

  magnetic tape wound on the take-up spool 2. Then, the programming circuit portion 29a, in response to each

  impulse provided by the generator

  23 at the clock input 64a and respective correspondent

  at a defined angle of rotation of the receiver coil, for example to a complete rotation of this receiver coil 2, determines from the magnetic tape position data stored in

  memory 30, and from the scroll direction

  of the magnetic tape stored in the displacement direction memory 31, the data relating to the position of the magnetic tape corresponding to this particular output signal of the pulse generator 23, and it ensures its storage, in place of the previous tape position data, in the tape position memory 30. If, during this determination, the magnetic tape position data exceeds the center of the total length of the magnetic tape, the programming circuit portion 29a then changes the state in state memory 63 from state a to state b, so that now

  programming part 29, is switched under the condition that

  activity as long as there is no sign of

  This is not done at the output 12 of the control circuit 10. Now, the computer program RP2b of the programming circuit portion 29b, in the same manner as the computer program RP2a of the programming circuit portion 29a. , determines with respect to each pulse supplied by the pulse generator 52 and arriving at its clock input 64b, and on the basis of the data stored in the tape position memory 30 and in the direction memory

2562? 02

  of displacement 31, the data concerning the new

  position of the magnetic stripe, respectively

  tion with the defined angle of rotation, a revolution of the supply reel 3 corresponding for example to each pulse arriving at the clock input 64b. Considering that individual tables of the computer programs RPla and RPIb, and individual tables of the computer programs RP2a and RP2b are identical and that for this reason, therefore, storage spaces in the processor are only necessary once , the programming circuit portions 28a, 28b and 29a and 29b of the embodiment of FIG.

  much less storage space in the program

  the programming circuit 28 and 29 of the embodiment of FIG. 1. In addition, the determination of the magnetic tape position made from the first half of the tape volume on a reel provides a more accurate result with respect to tape position than operating from the second half of the total volume

tape on the reel.

  In the exemplary embodiment shown in FIG. 2, the two band start (BA) 26 and end of band (BE) detectors 25 directly supply the band position data to the inputs.

  and 66 of the tape position memory 30.

  A data output from the position memory of

  band is connected to a display device 32

  to display the magnetic tape position data

  which is stored in the tape position memory.

  In addition, the tape position memory 30 includes an output for an activity signal which, in the example under consideration, is applied to the RS initial input of a switchable memory circuit 45

  part of a triggering device and

  Cage 44 of the control unit 11 of the recording or reproducing apparatus, via a line 67. This activity signal of the tape position memory 30 eliminates the blocking state of the circuit 44 established when the device is switched on or when a magnetic strip is inserted into the device switched on via the pulse shaping circuit 50 inside the circuit 44, and which serves to block the fast unwinding (SVL) or fast rewinding (SVR) until the activity signal appears at the output of the tape position memory 30 and, on the contrary, it establishes an operational state (CUE) or REVIEW) ensuring

  a transport of the band at a defined speed.

Claims (8)

  1. Recording apparatus or electronic reproduction   consumer tronic, comprising: - a magnetic tape wound on reels and of defined length for recording audio or video information, - a pulse generator controlled by the rotation of a   winding spindle on which is placed the spool cor-   - a measuring device placed after the pulse generator to measure the speed of rotation of the winding spindle,   a processor circuit for determining a location datum   to locate the corresponding position on the magnetic strip, from the data provided by the   measuring device and defining the rotational speed   winding spindle, and - a display to display the tape position based on   on the location data provided by the pro circuit   receiver, characterized in that: - the processor circuit (27) contains a first programming circuit (28) for calculating and transmitting the data (BP) relating to the position of the magnetic tape (1) from the data ( U2) of the measuring device (24) for measuring the rotational speed of the winding spindle (2) and from a datum defining the speed of the magnetic strip, as well as a second programming circuit (29). ) by which, from the respective last calculated and stored data, the tape position and the scrolling direction (LR) of the magnetic tape which has been stored in a scroll direction memory (31) for each successive pulse of the pulse generator (23) of the winding pin connected to a clock input (36) of the second programming circuit (29), the new data representing the band position associated with   impulse are calculated and are maintained   to the data output of the processor circuit, - the first programming circuit (28) is engaged only during the supply of a control signal by a control circuit (10) connected to a control input (33) of the first programming circuit for adjusting the tape speed and producing the control signal only when   the magnetic tape is driven at a pre-   determined, - and the operation of the second programming circuit (29) is blocked as long as   the execution of the program of the first pro-   Gramming takes place in the processor circuit (27).   A recording or reproducing apparatus according to claim 1, characterized in that the position data (BP) relating to the tape position and supplied by the processor circuit (27) are data relating to the remaining time of scrolling of the magnetic tape (1), expressed in hours and / or minutes.   3. Recording or reproduction apparatus   according to one of claims 1 or 2, characterized in   a data input of the processor circuit (27) is connected to the output (38) of a band length indication circuit (34), and in that said band length indication circuit provides at this particular output the data representing the length   the magnetic tape (1) placed in the device.   4. Recording or reproduction apparatus   according to any of claims 1 to 3, in   which is provided a pulse generator controlled by the rotation of the right winding spindle, and a pulse generator controlled by the rotation of the left winding spindle, said spindles carrying the winding coils of magnetic tape, characterized in that: - the two pulse generators (23, 52) are each followed by a measuring device (24, 54) serving to   measure the rotational speeds of the winding spindles   2, 3), respectively - the first programming circuit (28) and the second programming circuit (29) of the processor circuit (53) each comprise two programming circuit portions (28a, 28b; 29a; , 29b) operating successively with partial programs (RPla, RPIb; RP2a, RP2b) following each other, the first partial program (RPIa) being provided   for the calculation and emission of data (BP)   sensing a tape position in relation to the first half of the total length of the magnetic tape (1) from the increase of the tape length wound on the right pin (2) in the case of a direction of bandwidth (BE), while the second partial program (RPIb) is provided for calculating and transmitting data representing a tape position in relation to the second half of the total length of the magnetic stripe, from the decrease in tape length wound on the left pin (3) in the direction of scrolling towards the end of the tape, - in the processor circuit is inserted or formed, -30 during a program execution by the first   programming circuit (28), a con-   tr8le (57), whose control program ensures that the. programming circuit part (28a; 28b) for the particular partial program (RPla, RPlb) of the first computer program (RP1) 2702 associated with the winding pin whose measuring circuit outputs data representing a rotation speed of the winding spindle which is equal to or greater than the rotational speed of the spindle in correspondence to the center of the total length of the magnetic strip, the output (62) of the control device is connected to a state memory (63 ) which stores the engagement of a part (for example 28a) of the first programming circuit (28) until the other part (for example 28b) of this first programming circuit (28) is switched on, and   - when the second programming circuit is switched on   (29), there is an activation of the portion (eg 29a) of the second programming circuit corresponding to the particular winding pin for which the part last operated (for example   28a) of the first programming circuit.   5. Recording or reproduction apparatus   according to any one of claims I to 4,   characterized in that an output (68) of a control device (11), whose output information serves to establish an operating condition (PLAY) for scrolling the magnetic tape (1) at a defined speed, is connected at the output (69) of a device (40) for triggering the tape position identification, and in that said trigger device generates, in response to a trigger signal applied to its input (41), a output signal for only a few turns of a winding spindle (2)   to establish this operational condition.   The recording or reproducing apparatus according to claim 5, characterized in that said trigger signal is a signal produced in a pulse generator (50) in response to the introduction of the magnetic tape (1) into the device, or in response to an engagement of the tape drive of the apparatus, with introduction of a magnetic tape   which closes a control contact (43).   7. Recording or reproducing apparatus   according to one of claims 5 or 6, characterized in   what the operational condition, momentarily established,   of the magnetic tape (1) at a defined speed is the operational condition ("Cue" or "Review") corresponding to an increased speed of scrolling magnetic tape.   8. Recording or reproducing apparatus   according to any one of claims 1 to 7,   characterized in that there is provided a blocking device (46, 47) for blocking the set-up outlets of the fast-unwinding (SVL) or fast-rewinding (SRL) operating conditions of an operational device (11), also long as the processor circuit (53) does not apply to its feedback input (RS) a feedback signal generated at a defined speed of the band by the control circuit (10). ) used to establish the tape speed, or otherwise, in the case of a tape position identified.