JPH10262205A - Recording and reproducing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a VTR by which a prescribed program is quickly selected and reproduced from a finishing record magnetic tape in which plural programs are recorded. SOLUTION: This recording and reproducing device uses a VTR and a recording and reproducing device. While a tape is driven at a drive speed of (2N-1)V (N is a natural number being 2 or over), a recording track by a video signal of one of each specific program among (2N-1) sets of programs is formed sequentially on the tape and video signals recorded on adjacent recording tracks are recorded on the tape so as to be a video signal for an odd number field period and a video signal for an even number field period. The recorded tape on which the video signals are recorded as the above is driven at a drive speed of (2N-1)V and the recording tracks by video signals of one program among (2N-1) sets of programs are selectively scanned to reproduce the video signals by the VTR. The recording and reproducing device that records signals of each program for every longer time than a maximum rewinding time of the magnetic tape in the VTR has a fast access time. In the period while the VTR performs program-searching of a succeeding program in the case of recording and reproduction, a reproduction signal from the recording and reproducing device with a fast access time is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus including a magnetic recording / reproducing apparatus, and in particular, to easily switch (2N-1) programs (where N is a natural number of 2 or more) quickly. The present invention relates to a recording / reproducing apparatus capable of reproducing information at a time.

[0002]

2. Description of the Related Art A rotating drum provided with a pair of rotating magnetic heads having opposite azimuth angles at 180-degree symmetric positions is rotated at a predetermined number of revolutions, and the peripheral surface of the drum is rotated. A pair of rotating magnetic heads is used to move the magnetic tape running at a predetermined running speed V in a state where the position of the reference edge of the magnetic tape wound obliquely on at least a part thereof is regulated by a guide provided on the drum. When the helical scan is sequentially and alternately performed according to the rotation of each rotary magnetic head every 180 degrees, the sequential recording traces of the video signal to be recorded by the video signal of one sequential field period are recorded on the magnetic tape. 2. Description of the Related Art A magnetic recording / reproducing apparatus having a configuration capable of being sequentially formed in a state adjacent to a VTR has been widely used as a helical scan type VTR.

FIG. 9 shows a recording trace pattern on a magnetic tape T when a plurality of programs are sequentially recorded on the magnetic tape T on the time axis using the magnetic recording / reproducing apparatus having the above configuration. FIG. , B1o, B2e, B3o..., C1o, C2e, C3o in the magnetic tape T shown in FIG.
.. Indicate the recording trace of the video signal in each one field period. A, B, C, etc. in the above-mentioned drawing symbols are English characters for indicating the distinction between the program names recorded on the magnetic tape T. .. Indicate the field numbers. Furthermore, the subscripts o and e of the alphabetic characters are odd fields,
This is for discriminating the even fields, and the odd fields are denoted by o and the even fields by e.

The most common recording format when a plurality of programs are recorded on a magnetic tape T by a conventional magnetic recording / reproducing apparatus is, as shown in a recording trace pattern in FIG. Are arranged in series in the longitudinal direction of the magnetic tape T. Therefore, in the conventional magnetic recording / reproducing apparatus, when a specific program is selected and reproduced from the recorded magnetic tape T on which a plurality of programs are recorded, the first part of the specific program is recorded. In order to perform reproduction from the portion where the magnetic tape T is located, it is necessary to fast forward or rewind the magnetic tape T at a high speed to perform cueing. Therefore, it is difficult to select a specific program from a plurality of programs in a short time. Naturally, it has not been possible to confirm the contents of the plurality of programs in a short time. The above problem is widely known as a problem when recording and reproducing information signals using a tape-shaped recording medium.

[0005] As means for solving the above-mentioned problems, a recording / reproducing apparatus capable of rapidly reading specific information from recorded information, for example, recording / reproducing of various discs having a recording / reproducing function. The apparatus is used as an auxiliary recording / reproducing apparatus, and only the head of each program in a plurality of programs to be reproduced by a magnetic recording / reproducing apparatus (VTR) used as a main recording / reproducing apparatus is used as the auxiliary recording / reproducing apparatus. When the VTR takes over reproduction by the recording / reproducing apparatus prior to reproduction of the part following the beginning of the program, the address information recorded on the magnetic tape is used to perform the auxiliary processing. Playback output from the recording and playback device;
Japanese Patent Application Laid-Open No. 4-2 discloses a solution in which switching between reproduction and output from a VTR is performed so that a specific program can be selectively reproduced in a short time.
No. 58865, JP-A-7-123346 and the like.

Further, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-131751, the recording trace of a plurality of programs by the video signal of each program is the recording trace of the head of each program. At the beginning of the magnetic tape, they are sequentially arranged in a predetermined arrangement order, and each is arranged in a fixed repetition order, and a recording trace by a video signal in an odd field period and a recording trace by a video signal in an even field period are arranged. There has also been proposed a solution in which a specific program can be selected and reproduced in a short time by forming it in an adjacent state.

[0007]

However, in the above-mentioned solution, when a program to be reproduced by a VTR is reproduced, a head portion of the program reproduced by an auxiliary recording / reproducing device includes: A digital VTR having an address recording / reproducing function is used as the VTR so that continuous reproduction with a portion following the head portion of the program reproduced by the VTR is performed favorably.
There is a problem that a general consumer VTR having no address recording / reproducing function cannot be used as it is, and the above-described solution selects a plurality of programs to be reproduced. When reproducing, it is necessary to rewind to the beginning of the magnetic tape. For example, when rewinding from a portion near the end of the magnetic tape for 120 minutes to the beginning of the magnetic tape, the rewind operation is performed. Takes about two minutes, so that there is a problem that the program cannot be selected and reproduced quickly. Therefore, the appearance of a recording / reproducing apparatus free from the above-mentioned various problems has been desired.

[0008]

According to the present invention, a rotating drum provided with a pair of rotating magnetic heads having opposite azimuth angles at 180-degree symmetric positions is rotated at a predetermined rotational speed. The magnetic tape running at a predetermined running speed V while being wound around a part of the peripheral surface of the rotary drum is
When the helical scan is performed alternately by the pair of rotating magnetic heads sequentially, in correspondence with the rotation of each of the rotating magnetic heads at every 180 degrees, a sequential recording trace by a video signal of one sequential field period to be recorded is formed. In a magnetic recording / reproducing apparatus which can be sequentially formed adjacent to a magnetic tape, the magnetic tape is subjected to recording / reproducing by setting the traveling speed of the magnetic tape to (2N-1) V (where N is a natural number of 2 or more). In the (2N-1) programs, the recording trace by the video signal of each program is the recording trace by the signal of the first one frame period predetermined as the recording start portion for each program, and The tapes are sequentially arranged in a predetermined arrangement order at the beginning of the tape, and are arranged for every (2N-1) recording traces in a fixed repetition order. And information for individually identifying at least the (2N-1) program recording traces, wherein the recording traces of the video signal and the recording traces of the video signal in the even field period are formed adjacent to each other. It is configured to record the information related to the position in the longitudinal direction of the magnetic tape and to sequentially reproduce the recording traces of the selected individual programs in the recording traces of the (2N-1) programs. As a first recording / reproducing device, and at least a recording / reproducing target by the above-mentioned first recording / reproducing device (2)
All of the video signals individually corresponding to N-1) programs can be recorded for a time longer than the maximum rewind time of the magnetic tape in the first recording and reproducing apparatus, and The time required for selecting the video signal of the program to be reproduced from the video signals of the recorded programs and starting the reproduction is determined by the video of each program in the first recording and reproducing apparatus. A recording / reproducing apparatus capable of starting reproduction in an extremely short time as compared with a time required until a video signal of a program to be reproduced is selected from the signals and the reproduction can be started. When a video signal of a program desired to be reproduced is selected from the (2N-1) programs and reproduced from the first recording / reproducing apparatus, the first recording / reproducing apparatus is provided. Both with the second recording / reproducing device Means for simultaneously starting a search operation and a reproduction operation for the same reproduction desired program, selecting an output signal of the second recording / reproducing apparatus and outputting the selected signal, and a predetermined means from the second recording / reproducing apparatus. And a means for selecting an output signal from the first recording / reproducing device and outputting the reproduced signal after the reproduced output is output for a predetermined time, and the magnetic recording / reproducing device described above, The running speed of the tape is set to (2N-1) V (where N is 2
As the natural numbers described above, the recording trace of the (2N-1) programs to be recorded / reproduced by the video signal of each of the programs is the first predetermined recording start portion for each of the programs. Are sequentially arranged at the head of the magnetic tape in a predetermined arrangement order, and are recorded in a predetermined repetition order.
In addition to being arranged for every (2N-1) recording traces, a recording trace by a video signal in an odd field period and a recording trace by a video signal in an even field period can be formed adjacent to each other. -1) information for individually identifying the recording traces of the programs and information relating to the position in the longitudinal direction of the magnetic tape can be recorded, and the recording traces of the (2N-1) programs can be recorded. Of the two magnetic recording / reproducing devices configured to be able to sequentially reproduce the recording traces of the selected individual programs in (1) as the first and second magnetic recording / reproducing devices. When a video signal of a program desired to be reproduced is selected from the (2N-1) programs and reproduced from the first magnetic recording and reproducing apparatus, the first magnetic recording and reproducing apparatus and the second magnetic recording and reproducing apparatus Both with magnetic recording / reproducing device Means for causing a user to simultaneously start a search operation and a reproduction operation for the same reproduction desired program, select an output signal of the second magnetic recording / reproducing device and output the reproduced signal, and a first magnetic recording / reproducing device. After performing a rewinding operation of the magnetic tape to the head of the recording area of the magnetic tape, a recording track in which a signal of a program desired to be reproduced is recorded is transferred to the reproducing operation, and the second magnetic recording is performed. After the playback output for a predetermined time is output from the playback device,
Means for selecting an output signal from the first magnetic recording / reproducing apparatus and outputting it as a reproduction output, and when the output signal from the first magnetic recording / reproducing apparatus is selected and output as a reproduction, the second magnetic recording / reproducing apparatus A recording / reproducing apparatus including means for rewinding the magnetic tape to the head of the recording area of the magnetic tape, and information recorded on a control track of the magnetic tape as information related to the position in the longitudinal direction of the magnetic tape Using a control pulse or a magnetic tape to be reproduced by the first recording / reproducing apparatus, a signal of the first one frame period predetermined as a recording start portion of a program desired to be reproduced is recorded. When the signal is a frame signal after a time corresponding to the maximum rewind time of the magnetic tape in the first recording / reproducing device from the beginning of the program being played, the second recording / reproducing device replays. The selection switching from the output to the reproduction output of the first recording / reproducing apparatus is performed at a point in time when a recording track on which a signal of a program desired to be reproduced is recorded is selected after the magnetic tape is rewound, or A magnetic tape to be reproduced in the first recording / reproducing apparatus includes:
When the signal of the first one frame period predetermined as the recording start portion of the program desired to be reproduced is the signal of the first frame of the program to be recorded, the reproduction output of the second recording / reproducing apparatus is used. The selection switching to the reproduction output of the first recording / reproducing apparatus is performed after the magnetic tape has been rewound, and the maximum rewinding time of the magnetic tape in the first recording / reproducing apparatus from the beginning of the program to be recorded. And a recording / reproducing apparatus in which the magnetic tape is fast-forwarded to the position of the recording trace by the signal of the frame after the corresponding time and the recording trace where the signal of the program desired to be reproduced is recorded is selected. I do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific contents of a recording / reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIGS. 1 and 2 are block diagrams showing a schematic configuration of a recording / reproducing apparatus according to a different embodiment of the recording / reproducing apparatus of the present invention. 1 and 2, reference numeral 1 denotes an input terminal of an information signal (a video signal and an audio signal accompanying the video signal) to be recorded / reproduced in the recording / reproducing apparatus, and 2 denotes an output terminal of the recording / reproducing apparatus. An operation unit 3 is provided with an input device for setting various operation modes of the recording / reproducing apparatus. A control unit 4 includes, for example, a microprocessor, a read-only memory, a random access memory, and the like. Of the recording / reproducing apparatus. Reference numeral 5 denotes a first recording / reproducing device used as a main recording / reproducing device in the recording / reproducing device of the present invention, and the first recording / reproducing device 5 has a configuration mode described later with reference to FIG. A VTR is used.

Reference numeral 6 in FIG. 1 designates a recording / reproducing apparatus capable of rapidly reading out specific information from recorded information, for example, an auxiliary recording / reproducing apparatus for recording / reproducing various discs having a recording / reproducing function. A reference numeral 8 in FIG. 2 denotes an auxiliary recording / reproducing device (second recording / reproducing device) using a VTR having the same configuration as the first recording / reproducing device used as the main recording / reproducing device. 2 recording and reproducing apparatus). L denotes the control unit 4 and the first and second recording / reproducing devices 5, 6
(8) is a signal transmission path provided between The output signal from the first recording / reproducing device 5 and the output signal from the second recording / reproducing device 6 (FIG. 1) and 8 (FIG. 2) are supplied from the control unit 4. An output signal switching unit that switches the output signal according to the switching control signal and sends it to the output terminal 2.

In the recording / reproducing apparatus of the present invention shown in FIGS. 1 and 2, a V used as a first recording / reproducing apparatus is used.
TR is to rotate a rotating drum provided with a pair of rotating magnetic heads having opposite azimuth angles at 180 ° symmetrical positions at a predetermined number of rotations, and to perform a rotation on a circumferential surface of the rotating drum. When the magnetic tape running at a predetermined running speed V while being wound around the section is sequentially and alternately helically scanned by the pair of rotary magnetic heads, the rotary magnetic head rotates by 180 degrees. A helical scan type VTR (magnetic recording / reproducing apparatus) capable of sequentially forming, in a state adjacent to a magnetic tape, sequential recording traces by a video signal of one sequential field to be recorded in a sequential manner.

The VTR 5 (the same applies to the VTR 8) is subjected to recording / reproducing with the running speed of the magnetic tape being (2N-1) V (where N is a natural number of 2 or more) (2N-). 1) The recording trace by the video signal of each program in the individual programs is the recording trace by the signal of the first one frame period which is predetermined as the recording start portion for each individual program, at the beginning of the magnetic tape. It is sequentially arranged in a predetermined arrangement order, and is arranged for every (2N-1) recording traces in a constant repetition order. In addition, the recording trace by the video signal in the odd field period and the video signal in the even field period And information for individually identifying at least the (2N-1) program recording traces, and the position in the longitudinal direction of the magnetic tape. Can record information to be communicated, it is further configured to record track of individual programs selected in the above-mentioned (2N-1) number of a program recorded traces to allow sequentially reproduced.

FIG. 3 shows the aforementioned VTR 5 (the same applies to VTR 8).
FIG. 3 is a diagram for explaining a configuration example and an operation mode of FIG.
, 9 is an input terminal of an information signal (a video signal and an audio signal accompanying the video signal) to be recorded / reproduced in the VTR 5 (or 8), and 10 is a VTR 5 (or 8).
Output terminal. In the drawing, T is a magnetic tape, and this magnetic tape T is wound around a part of the peripheral surface of a lower drum Dd and a rotating drum (upper drum) Du, depending on the operation mode of the magnetic recording / reproducing apparatus. The vehicle is driven at a predetermined speed in a predetermined direction. The running of the magnetic tape T is as follows.
It is well known that the magnetic tape T sandwiched between the capstan 11 rotated by the capstan motor Mc and a pinch roller (not shown) is driven by the drive rotation of the capstan motor Mc. .

Ha and Hb are rotary magnetic heads having opposite azimuth angles provided in pairs at 180-degree symmetric positions on the rotary drum Du. The two rotary magnetic heads Ha and Hb described above are The video signal for one field period is recorded on the magnetic tape T or reproduced from the magnetic tape T by one of the rotary magnetic heads alternately and sequentially every half rotation of the rotary drum Du. Rotating magnetic head H
a, Hb is mounted on the rotating drum Du,
Drum motor Md → Rotation phase detector 12 → Phase comparator 1
3 → the amplifier 14 → the drum motor Md is driven and rotated by the drum motor Md rotating at a predetermined rotation phase by the reference signal supplied to the phase comparator 13 in the automatic control system of one cycle.

In FIG. 3, the description of the speed control circuit of the drum motor Md is omitted (the same applies to a capstan motor Mc described later). FIG.
Magnetic head 27 shown on the lower edge side of the magnetic tape T in FIG.
Is a control head, and a magnetic head 26 shown on the upper edge side of the magnetic tape T is an audio head, and 25 in FIG. 3 is a signal generation head mounted on a rotation shaft of a capstan motor Mc. This is a rotation phase detector that performs an operation of detecting the rotation phase of the capstan from a pattern.

The patterns of the recording marks recorded on the magnetic tape T by the rotary magnetic heads Ha and Hb are based on the relative linear velocities between the rotary magnetic heads Ha and Hb and the magnetic tape T and the rotational magnetic head. Since it is determined by the angle between the surface of the rotation trajectory and the reference edge of the magnetic tape, for example, if the running speed of the magnetic tape during the recording operation is different from the running speed of the magnetic tape during the reproducing operation, the magnetic tape It is well known that the rotating magnetic head cannot properly track the recording trace formed on T during the reproducing operation. Even during a reproducing operation in which the traveling speed of the magnetic tape T during the reproducing operation is different from the traveling speed of the magnetic tape T during the recording operation, the rotating magnetic head can improve the recording trace of the magnetic tape T to be tracked. Various means have heretofore been proposed as means for enabling tracking.

That is, for example, the rotary magnetic head is driven and displaced by an actuator (which may be of any type of electrodynamic type, piezoelectric type, or electromagnetic type) provided in the automatic tracking control system, and the rotary magnetic head is moved. The recording track is traced (for example, see Japanese Patent Application Laid-Open No. 5-110973). The inclination of the drum is changed in accordance with the running speed of the magnetic tape to change the running direction of the magnetic tape and the rotation of the rotary magnetic head. By relatively changing the direction of the trajectory plane, the rotating magnetic head is caused to track the recording trace (for example, see JP-A-6-318351).
The height of the guide roller of the magnetic tape provided on the entrance side and the exit side to the drum corresponding to the traveling speed of the magnetic tape is changed in accordance with the traveling speed of the magnetic tape, and the traveling direction of the magnetic tape is changed. By changing the direction of the rotation locus plane of the rotating magnetic head relatively, the rotating magnetic head can be traced to a recording mark (for example, see Japanese Patent Application Laid-Open No. 7-57351). The height of the magnetic tape guide rollers provided on the entrance and exit sides to the drum correspond to the running speed of the magnetic tape, while changing the inclination of the drum corresponding to the running speed of the magnetic tape. Then, by changing the running direction of the magnetic tape and the direction of the rotational trajectory surface of the rotary magnetic head relatively, the rotary magnetic head is caused to track the recording trace ( If For example, JP-A-6-1 282
910) and other means have been proposed.

The magnetic recording / reproducing apparatus (VTR) shown in FIG. 3 has a rotary magnetic head Ha, Hb provided with a pair of rotating magnetic heads Ha and Hb having opposite azimuth angles at 180 ° symmetric positions. The drum Du is rotated at a predetermined rotation speed, and the magnetic tape T wound around a part of the peripheral surface of the rotating drum Du and the lower drum Dd is rotated at a predetermined traveling speed V
, The so-called normal recording / reproducing operation is performed, the pair of rotating magnetic heads Ha, H
Corresponding to the rotation of each rotary magnetic head at every 180 degrees in b, the sequential recording trace of the video signal to be recorded by the video signal of one successive field period is a recording trace pattern as described with reference to FIG. The configuration is such that it can be formed on the magnetic tape T sequentially adjacently.

The VTR shown in FIG. 3 is subjected to recording and reproduction by setting the traveling speed of the magnetic tape T during a recording operation to (2N-1) V (where N is a natural number of 2 or more). Recording traces by video signals of individual programs in (2N-1) programs are recorded in a fixed repetition order.
(2N-1) recording traces are arranged for every (2N-1) recording traces, and the recording traces by the video signal in the odd field period and the recording traces by the video signal in the even field period are adjacent to each other. Is recorded, a recorded magnetic tape having a recording trace pattern as illustrated in FIG. 7 is obtained.

In the input terminal 9 of the recording / reproducing signal processing circuit 28 in FIG. 3, as a signal to be recorded / reproduced by the VTR, for example, a chrominance signal in a luminance signal band is shared with the luminance signal by band sharing multiplexing. A wideband composite color video signal (for example, a wideband signal in the form of a composite color video signal of the NTSC system) in a converted state is supplied. The wideband composite color video signal supplied to the input terminal 9 of the recording / reproducing signal processing circuit 28
After being separated into the luminance signal Y and the carrier chrominance signal C in the separation circuit, the luminance signal Y is converted into a frequency modulated wave signal by the luminance signal by the frequency modulator, and the carrier chrominance signal C output from the YC separation circuit is output. Is a low-frequency conversion carrier color signal in a color signal processing circuit. The recording signal in the form of a frequency multiplexed signal in which the frequency modulated wave signal by the luminance signal and the low-frequency conversion carrier color signal are mixed is supplied to a video signal recording / reproducing switch after being amplified by a recording amplifier. The video signal recording / playback switch supplies the recording signal in the form of the frequency multiplexed signal to the rotary magnetic heads Ha and Hb when the VTR is in the recording operation mode.

When the VTR is in the reproduction operation mode, a reproduction signal in the form of a frequency multiplexed signal reproduced from the magnetic tape T by the rotary magnetic heads Ha and Hb is supplied to a reproduction amplifier in the recording / reproduction signal processing circuit 28. The reproduction signal amplified by the reproduction amplifier, that is, the reproduction signal in the form of a frequency multiplexed signal of the low-frequency conversion carrier chrominance signal and the frequency modulated signal of the luminance signal is subjected to a high-pass filter and a low-pass By the device, the frequency modulated wave signal by the luminance signal and the low-frequency conversion carrier chrominance signal are separated, the frequency modulated wave signal by the luminance signal is demodulated by a frequency demodulator to be a luminance signal Y, The low-frequency conversion carrier color signal is converted into a carrier color signal by a color signal processing circuit. The luminance signal and the carrier chrominance signal are mixed by a mixer to form a composite color video signal in a state in which the chrominance signal is band-multiplexed with the luminance signal in the luminance signal band. Output to

In the VTR shown in FIG.
When the recording traces by the video signal are sequentially formed on the magnetic tape T such that the recording trace pattern as described above is formed, the recording traces have the opposite azimuth angles at the 180-degree symmetric positions. Rotating magnetic heads Ha and H
b, the rotating drum Du is rotated at a predetermined rotation speed, and the magnetic tape T wound around a part of the peripheral surface of the rotating drum Du and the lower drum Dd is rotated at a predetermined traveling speed. V, and the pair of rotating magnetic heads H
It is sufficient to form a sequential recording trace on the magnetic tape T by a video signal for one field period in a video signal to be recorded in correspondence with the rotation of each rotary magnetic head at every 180 degrees in a and Hb.

At the time of the recording operation described above, the control signal generated by the control signal generator 24 is supplied to the control head 27 via the fixed contact b and the movable contact v of the changeover switch 20.
Is recorded on the control track of the magnetic tape T. The running system of the magnetic tape T during the recording operation is controlled by a rotation phase detector 25 that detects the rotation phase of the capstan from a signal generating pattern attached to the rotation shaft of the capstan motor Mc. The reference signal generated by the reference signal generator 15 is applied to the fixed contact of the changeover switch 16 to the phase comparator 17 to which the generated rotational phase signal is supplied via the fixed contact b and the movable contact v of the changeover switch 18. By being supplied via R and the movable contact v, the phase comparator 17 → amplifier 19 → capstan motor Mc → rotational phase detector 25 → fixed contact b and movable contact v of the changeover switch 18 → phase comparison This is performed by controlling the error signal from the phase comparator 17 to be zero by a single-cycle automatic control system such as the device 17.

Further, the VTR shown in FIG.
Magnetic tape T having a recording trace pattern as described above for
Is reproduced, a rotating drum Du provided with a pair of rotating magnetic heads Ha and Hb having opposite azimuth angles at 180-degree symmetric positions is rotated at a predetermined number of rotations. The magnetic tape T wound around a part of the peripheral surface of the rotary drum Du and the lower drum Dd is run at a predetermined running speed V, and the pair of rotary magnetic heads Ha, H
Corresponding to the rotation of each rotary magnetic head at every 180 degrees in b, the recording signals in the sequential recording traces by the video signals of one sequential field period in the video signal to be recorded are reproduced from the magnetic tape.

The control of the running system of the magnetic tape T during the reproducing operation is performed by controlling the control signal reproduced from the control track of the magnetic tape T by the control head 27 by discriminating between the movable contact v and the fixed contact c of the changeover switch 20 and the control signal. At the same time, the reference signal generated by the reference signal generator 15 is supplied to the fixed contact P and the movable contact v of the changeover switch 16 via the switch 21 and the fixed contact c of the changeover switch 18. Supplied through the phase comparator 17 → the amplifier 19 →
Capstan motor Mc → magnetic tape T → control head 27 → movable contact v and fixed contact c of switch 20 → control signal discriminator 21 → fixed contact c and movable contact v of switch 18 → phase comparator 17 This is performed by controlling the error signal from the phase comparator 17 to be zero by an automatic control system of one round of the configuration.

Next, the magnetic tape T at the time of the recording operation is changed to (2N-1) V by the VTR shown in FIG.
(However, N is a natural number of 2 or more.)
1) The recording trace by the video signal of each program in the individual programs is used as the recording start portion for each program, and the recording trace by the signal of a predetermined first one frame period is the head portion of the magnetic tape. Are sequentially arranged in a predetermined arrangement order, and (2)
FIG. 7 illustrates an example in which N-1) recording traces are arranged for each recording trace, and recording traces by the video signal in the odd field period and recording traces by the video signal in the even field period are adjacent to each other. A case in which such a recording trace pattern is recorded on a magnetic tape will be described.

First, in the VTR shown in FIG. 3, the recording trace of the (2N-1) programs to be recorded and reproduced by the video signal of each program is recorded as shown in FIG. In the case of recording and forming as a trace pattern, it is possible to identify which of the (2N-1) programs recorded on the magnetic tape T is the recorded trace by the video signal of the program at the time of reproduction. If possible, it is also possible to instantly select and reproduce a desired program from a plurality of programs.

When recording traces of video signals of (2N-1) programs are sequentially recorded on the magnetic tape T, for example, a control signal or a track for program identification is transmitted to the magnetic tape T. The identification signal is recorded. For example, before the recording trace by the video signal of (2N-1) programs is sequentially recorded and formed on the magnetic tape T, in a state where the magnetic tape T is run at the running speed V, the control head 27 A control signal is recorded on a control track of the magnetic tape T, and a track identification signal is recorded on an audio track of the magnetic tape T by an audio head 26. The recording operation of the control signal on the magnetic tape T and the recording operation of the track identification signal are performed by switching the movable contact v of the changeover switch 16 to the fixed contact R side, and changing each movable contact of the changeover switches 18, 20, 22. This is performed by running the magnetic tape T at the running speed V with v switched to the fixed contact b side.

When the movable contacts v of the changeover switches 16, 18, 20, and 22 are switched to the above-described switching mode, the control of the traveling system of the magnetic tape T traveling at the traveling speed V is controlled by the cap. A rotation phase detector 2 that performs an operation of detecting the rotation phase of the capstan from a signal generation pattern attached to the rotation shaft of the stun motor Mc.
5 is supplied to the phase comparator 17 via the fixed contact b and the movable contact v of the changeover switch 18, and at the same time, the reference signal generated by the reference signal generator 15 is changed by the changeover switch 16 Supplied via the fixed contact R and the movable contact v of the phase comparator 17 → the amplifier 19 → the capstan motor Mc → the rotational phase detector 25 → the fixed contact b and the movable contact v of the changeover switch 18 → the phase comparator This is performed by controlling the error signal from the phase comparator 17 to be zero by a one-time automatic control system having a configuration such as 17.

The control signal generated by the control signal generator 24 is transmitted to the control signal generator 24.
→ The fixed contact b and the movable contact v of the changeover switch 20 → The track supplied to the control head 27 by the circuit of the control head 27 and recorded on the control track of the magnetic tape T, and the track generated by the track identification signal generator 23 The identification signal is a track identification signal generator 2
3 → the fixed contact “b” of the changeover switch 22 and the movable contact “v” → supplied to the audio head 26 by the circuit of the audio head 26 and recorded on the audio track of the magnetic tape T. FIG. 4 illustrates a frame discrimination pulse {(a) in FIG. 4, a control signal {(b) in FIG. 4}, and a track identification signal {(c) in FIG. 4}.

The control signal recorded on the control track of the magnetic tape T is assumed to be a pulse of a frame period in the following description, and a recording trace of a video signal recorded in an odd field period and a video signal in an even field period are recorded. One control pulse is recorded for every two successive recording traces on the magnetic tape T on which the recording traces in which the signals are recorded are sequentially recorded. The track identification signal recorded on the audio track of the magnetic tape T by the audio head 26 is shown as data indicating the contents of the program in FIGS. 4 to 6, but is recorded and formed on the tape. A pulse may be recorded as a track identification signal only at a position corresponding to a recording trace of a specific program in a recording trace group by a video signal of a different program, or a pulse width modulation of the control signal may be performed. Then, the track identification signal may be recorded on the magnetic tape T.

As described above, the magnetic tape T on which the control signal and the track identification signal are recorded in advance is rewound, and the magnetic tape T is fixed at a constant level, for example, as shown in the recording trace pattern illustrated in FIG. In a repetition order of (2N-1) recording traces, and in such a recording mode that the recording trace by the video signal in the odd field period is adjacent to the recording trace by the video signal in the even field period ( When recording the video signals of 2N-1) programs on the magnetic tape T, the movable contact v of the changeover switch 22 is switched to the fixed contact P side, and the changeover switch 1
The magnetic tape T is run at a running speed of (2N-1) V with the movable contacts v in 8, 20, and 22 being switched to the fixed contact c side.

Two rotating magnetic heads H are provided in pairs at 180-degree symmetric positions on the rotating drum Du.
a and Hb sequentially and alternately record the video signal for one field period on the magnetic tape T by one rotating magnetic head for each half rotation of the rotating drum Du. The rotating magnetic heads Ha and Hb are attached. The rotating drum Du is a drum motor Md → a rotational position detector 12 → a phase comparator 13 →
The amplifier 14 is driven and rotated by the drum motor Md that rotates at a predetermined rotation phase in accordance with the reference signal supplied to the phase comparator 13 in the automatic control system of one cycle of the drum motor Md.

In the above state, the track identification signal reproduced by the audio head 26 is illustrated in FIG. 5A.
The control signal supplied to the control signal discriminator 21 via the movable contact v and the fixed contact c is reproduced by the control head 27 (FIG. 5B). The symbol｝ in which the differential waveform of the reproduced control signal is shown is also supplied to the control signal discriminator 21 via the movable contact v and the fixed contact c of the changeover switch 20.

Therefore, the control signal discriminator 2
1, the rising portion of the control signal corresponding to the identification signal indicating the program to be recorded on the magnetic tape T first among the video signals of the (2N-1) programs to be recorded from now on. , The original control signal is frequency-divided by (2N-1) by adding a falling pulse positioned at a predetermined ratio at the same time as extracting the program control instruction signal supplied via the terminal 29. The control signal is generated as shown in FIG. 5 (c).
The example shown in FIG. 5 shows a case where the (2N-1) frequency division is a frequency division by three.
, Via the fixed contact c and the movable contact v of the changeover switch 18.

On the other hand, the phase comparator 17 has a reference signal having a frame period synchronized with the video signal to be recorded by the reference signal generator 15 via the fixed contact R and the movable contact v of the changeover switch 16. Is supplied, the capstan motor Mc is connected to the phase comparator 17 → the amplifier 19 → the capstan motor Mc → the magnetic tape T → the control head 27 → the movable contact v and the fixed contact c of the changeover switch 20.
→ Control signal discriminator 21 → Fixed contact c and movable contact v of changeover switch 18 → Driving rotation such that the error signal from phase comparator 17 becomes zero by a single round automatic control system such as phase comparator 17. Then, the magnetic tape T runs at a running speed of (2N-1) V (3 times speed in the example of FIG. 5) in a state where the video signal is recorded at a position corresponding to the designated control signal.

Then, of the video signals of the (2N-1) programs, the recording signal based on the video signal of the program to be recorded on the magnetic tape T first is sent from the recording / reproducing signal processing circuit 28 to the rotating magnetic head. By supplying the signals to Ha and Hb and recording them on the magnetic tape T, the recording trace by the video signal of the program to be recorded on the magnetic tape T first is illustrated in FIG. It is recorded and formed as follows. As described above, first the magnetic tape T
When the recording trace by the video signal of the program which is to be recorded is completed as shown in FIG. 8A, the control signal discriminator 21 is connected to the control signal discriminator 21 via the terminal 29. A program selection instruction signal that uses a control signal corresponding to a position where a program is recorded is provided.

The magnetic tape T is such that a video signal can be recorded at a position corresponding to a designated control signal (2N
-1) A recording signal based on the video signal of the program that is to be recorded on the magnetic tape T second among the video signals of the (2N-1) programs that runs at the traveling speed of V and is a recording / reproducing signal The recording tracks are supplied to the rotating magnetic heads Ha and Hb from the processing circuit 28 and are recorded on the magnetic tape T. The recording trace of the second program to be recorded on the magnetic tape T by the video signal of the second program is shown in FIG. Recording is formed as illustrated in FIG. 8B.

In the video signals of the (2N-1) programs,
Secondly, when the recording trace by the video signal of the program to be recorded on the magnetic tape T is completed as shown in FIG. 8B, the terminal 29 is connected to the control signal discriminator 21. Then, a program selection instruction signal that uses a control signal corresponding to the position where the third program is recorded is provided. The magnetic tape T runs at a running speed of (2N-1) V at which a video signal can be recorded at a position corresponding to the designated control signal, and (2N-1)
Among the video signals of the three programs, the recording signal based on the video signal of the program to be recorded on the magnetic tape T third from the recording / reproducing signal processing circuit 28 outputs the rotating magnetic head H
a and Hb are recorded on the magnetic tape T, and the recording trace of the third program to be recorded on the magnetic tape T by the video signal of the program is illustrated in FIG. 8C. Is formed as follows. In this manner, the recording traces of all the video signals of the (2N-1) programs to be recorded are recorded on the magnetic tape T.

The recorded trace pattern on the recorded magnetic tape T in which (2N-1) programs to be recorded are recorded as described above is, for example, as shown in FIG. The recording traces by the video signal of one specific program are arranged for every (2N-1) recording traces in a certain repetition order, and the recording trace by the video signal in the odd field period and the video in the even field period are recorded. In a state where the recording trace by the signal is recorded adjacently, the recording trace by the video signal of (2N-1) programs is recorded on the magnetic tape.

Next, in the state where the vehicle is run at the running speed of (2N-1) V as described above, the recording traces by the video signals of (2N-1) programs as shown in FIG. The recorded magnetic tape recorded is run at a running speed of (2N-1) V, and a pair having opposite azimuth angles is formed at 180-degree symmetric positions on a rotating drum rotated at a predetermined rotation speed. The rotating magnetic heads Ha and Hb form (2N-
1) When the recording traces of one of the programs by the video signal of one of the programs are sequentially scanned, the recording traces are set to be reproduced from the (2N-1) programs to be recorded and reproduced. The reproduction operation from the recording trace by the video signal of one specific program can be performed. Then, as described above (2N
-1) Selective reproduction of a recording trace by a video signal of a certain one of the programs uses a control signal recorded on a recorded magnetic tape and information for sequentially identifying a recording trace. (See FIG. 6).

That is, the VTR shown in FIG.
The magnetic tape T is run at a running speed of (2N-1) V (where N is a natural number of 2 or more), and each of the (2N-1) programs to be recorded and reproduced is recorded. The recording trace by the video signal is recorded in the first one frame period as a recording start portion in each program. The recording trace by the signal in the first frame period is sequentially arranged in a predetermined arrangement order at the head of the magnetic tape. In the (2N-1) programs to be recorded / reproduced, the recording traces of each of the programs are recorded in a fixed repetition order in the order of (2N-1).
In a state where the recording traces by the video signal in the odd-numbered field period and the recording traces by the video signal in the even-numbered field period are adjacent to the recording trace by the video signal in the state of being arranged for each recording trace of the book, the recording trace pattern is formed on the magnetic tape. In a certain recorded magnetic tape, for any of a plurality of programs recorded on the recorded magnetic tape, a recording mark in which the beginning of the program is recorded is necessarily at the beginning of the winding of the magnetic tape. Located near the part.

Then, from the recorded magnetic tape in which the (2N-1) programs are recorded, the VTR shown in FIG. 3 is used to select (2N-1) programs. In order to select and reproduce a recording trace of a particular program by a video signal, the magnetic tape is first rewound to the beginning. As a result, the recording trace by the signal of the first one frame period predetermined as the recording start portion in each program recorded at a position near the head of the recorded magnetic tape is recorded on the magnetic tape as described above. The search can be performed within a short time after the end of the operation.

However, for example, during reproduction of a specific program recorded on a recorded magnetic tape having a magnetic tape length capable of performing normal reproduction for 120 minutes, the recorded magnetic tape is wound. If another program is selected near the end and the rewinding operation is performed at, for example, a magnetic tape traveling speed of 60 times the average, the required rewinding time in that case is about 2 minutes. In this way, the (2N-1) programs are recorded, and from the recorded magnetic tape having a magnetic tape length capable of performing normal reproduction for 120 minutes, the VTR shown in FIG.
When only the individual programs are sequentially selected and reproduced by using only the program, the time required for the selection switching of a maximum of about 2 minutes is required every time a switching selection operation to a different program is performed. Will be done.

Thus, in the recording / reproducing apparatus of the present invention shown in FIG. 1, the (2N-1) programs are recorded from the recorded magnetic tape in which (2N-1) programs are recorded as described above. And a first recording / reproducing device 5 (VTR 5 described above with reference to FIG. 3) configured to select and reproduce a recording trace of a specific one of the programs by a video signal. In addition, the first recording / reproducing apparatus is used for all the video signals individually corresponding to the (2N-1) programs to be recorded / reproduced by the first recording / reproducing apparatus 5 described above. 5 can be recorded over a time value longer than the maximum rewind time (about 2 minutes in the above example) of the magnetic tape, and the video signal of each recorded program can be reproduced. Video signal of the program The time required for switching and starting the reproduction is determined by selectively switching the video signal of the program to be reproduced from the video signals of the respective programs in the first recording / reproducing apparatus 5 to start the reproduction. Compared to the time it takes to be enabled (up to about 2 minutes in the example above)
A recording / reproducing device capable of starting reproduction in an extremely short time is provided as a second recording / reproducing device 6 (auxiliary recording / reproducing device 6).

That is, in the recording / reproducing apparatus shown in FIG.
When the video signal of the program desired to be reproduced is selected from the (2N-1) programs recorded on the magnetically recorded tape and reproduced from the first recording / reproducing apparatus 5, the first recording is performed. Both the reproducing device 5 and the second recording / reproducing device 6 simultaneously start a search operation and a reproducing operation for the same reproduction desired program. As the second recording / reproducing device 6, a recording / reproducing device having a short access time, such as a magnetic disk (or a magneto-optical disk, a semiconductor memory, or the like) as described above, is used. . And
While the first recording / reproducing apparatus 5 starts the rewinding operation and rewinds the magnetic tape for the search operation of the program desired to be reproduced as described above, the second recording / reproducing apparatus 5 performs the second recording / reproducing. The device 6 has completed the search operation for the same reproduction desired program as the reproduction desired program of the first recording / reproduction device 5 in a short time, and performs the reproduction operation for the reproduction desired program. The obtained reproduction signal is transmitted to the output terminal 2 via the output signal switching section 7.

The second recording / reproducing device 6 has the maximum rewind time of the magnetic tape in the first recording / reproducing device 5 (about 2 minutes in the above example) and the first
The predetermined time set in correspondence with the sum of the time required for the recording / reproducing apparatus to complete the rewinding operation of the magnetic tape and the time required to start the reproduction by selectively switching the video signal of the program desired to be reproduced. Reproduction time [(b) of FIG. 10 and FIG.
The first recording / reproducing apparatus 5 completes the rewinding operation of the magnetic tape while performing the reproducing operation of the reproduction desired program for [τ seconds in (b)], and then performs the predetermined operation in the video signal of the reproduction desired program. Is set to a state where reproduction from the switching portion can be started [see FIG. 10 (c) and FIG. 11 (c)].

When the predetermined reproduction time elapses, the output signal switching unit 7 uses the switching control signal [see FIG. 10 (f) and FIG. 11 (f)] supplied from the control unit 4. The output signal transmitted from the second recording / reproducing device 6 to the terminal 2 is switched to the output signal from the first recording / reproducing device 5 and transmitted to the output terminal 2. (E) of FIG. 10 and (e) of FIG. 11 show a reproduction output signal from the first recording / reproducing device 5, and (g) of FIG. 10 and (g) of FIG. (B) and the reproduced output signal from the first recording / reproducing device 5 shown in FIG. 11 (b), and the second output signal shown in FIG. 10 (e) and FIG. 11 (e). 3 shows an output signal output from the output signal switching unit 7 to the output terminal 2 in a state where the output signal from the recording / reproducing device 6 is switched.

In the recording / reproducing apparatus of the present invention shown in FIG. 2, the (2N-1) programs are transferred from the recorded magnetic tape in which (2N-1) programs are recorded as described above. One of two magnetic recording / reproducing apparatuses (VTRs described with reference to FIG. 3) configured to be able to select and reproduce a recording trace of a specific one of the programs by a video signal. Is referred to as a first magnetic recording / reproducing device 5, and the other magnetic recording / reproducing device is referred to as a second magnetic recording / reproducing device 8. Then, when the video signal of the program desired to be reproduced is selected from the (2N-1) programs and reproduced from the first magnetic recording / reproducing device 5, the first magnetic recording / reproducing device 5 and the second magnetic recording / reproducing device 5 And the magnetic recording / reproducing device 8 at the same time start a search operation and a reproducing operation for the same reproduction desired program at the same time.

While the first magnetic recording / reproducing device 5 starts the rewinding operation and rewinds the magnetic tape for the search operation of the program desired to be reproduced, the second magnetic recording / reproducing device 8 However, the search operation for the same desired reproduction program as the desired reproduction program of the first magnetic recording / reproducing apparatus 5 is completed in a short time, and the reproduction obtained by performing the reproduction operation for the desired reproduction program is performed. The signal is sent to the output terminal 2 via the output signal switching unit 7. That is, the recorded magnetic tape to be reproduced by the first magnetic recording / reproducing device 5 is to be reproduced by the recording / reproducing device shown in FIG.
All signals of -1) programs or signals of (2N-1) programs excluding signal portions prepared to be reproduced by the second magnetic recording / reproducing device 8 are recorded.

However, the recorded magnetic tape reproduced by the second magnetic recording / reproducing device 8 has a maximum rewind time of the magnetic tape in the first magnetic recording / reproducing device 5 (about 2 minutes in the above-described example). From the state in which the first magnetic recording / reproducing device 5 has completed the rewinding operation of the magnetic tape, and the required time from the time when the video signal of the program desired to be reproduced can be selectively switched and the reproduction can be started. Since it is only necessary that at least a signal over a predetermined reproduction time set corresponding to the time is recorded, both the first magnetic recording and reproducing apparatus 5 and the second magnetic recording and reproducing apparatus 8 perform the same reproduction. When starting the search operation and playback operation of the desired program at the same time,
Even if both of them start the operation from the magnetic tape rewinding operation, the second magnetic recording / reproducing device 8
The tape amount targeted for rewinding in the above is the running speed when the magnetic tape operates in the normal recording / reproducing mode, and is only a tape amount for at most two minutes in terms of time.

That is, assuming that the rewind speed is, for example, 60 times the average, the rewind time in the first magnetic recording / reproducing apparatus 5 is a maximum of 2 minutes for a 120-minute tape, and the second magnetic recording is performed. Since the rewinding time in the reproducing device 8 is a maximum of 2/60 minutes (2 seconds), as described above, the first magnetic recording / reproducing device 5 performs the rewinding operation for the search operation of the program desired to be reproduced. Is started and the magnetic tape is rewound, the second magnetic recording / reproducing device 8
Terminates the search operation for the same reproduction desired program as the reproduction desired program of the first magnetic recording / reproducing apparatus 5 in a short time, and outputs the reproduction signal obtained by performing the reproduction operation for the reproduction desired program. The signal can be sent to the output terminal 2 via the output signal switching section 7.

The second magnetic recording / reproducing device 8 has a maximum rewind time of the magnetic tape in the first magnetic recording / reproducing device 5 (about 2 minutes in the above-described example) and the first magnetic recording / reproducing device 8 described above. A predetermined time set corresponding to the sum of the time required for the magnetic recording / reproducing apparatus to complete the rewinding operation of the magnetic tape and the time required to start the reproduction by selectively switching the video signal of the program desired to be reproduced. While the reproduction operation of the program desired to be reproduced is performed over the reproduction time [τ seconds in FIG. 12B], the first magnetic recording / reproducing apparatus 5 ends the operation of rewinding the magnetic tape, and then performs the reproduction request. A state where reproduction from a predetermined switching portion in the video signal of the program can be started (see FIG. 12C).

When the above-mentioned predetermined reproduction time has elapsed, the output signal switching section 7 receives the second control signal [see (f) in FIG.
The output signal transmitted from the magnetic recording / reproducing device 8 to the terminal 2 is switched to the output signal from the first magnetic recording / reproducing device 5 and transmitted to the output terminal 2. (E) of FIG. 12 shows a reproduced output signal from the first recording / reproducing device 5, and
(G) of FIG. 12 shows the first state shown in (b) of FIG.
In the state where the reproduction output signal from the recording / reproducing device 5 and the reproduction output signal from the second recording / reproducing device 8 shown in FIG. 2 shows an output signal that is being output. Note that the switching operation of the output signal switching unit 7 at the time when the predetermined reproduction time has elapsed causes the second magnetic recording / reproducing device 8
When the signal sent to the terminal 2 is switched to the output signal from the first magnetic recording / reproducing device 5, the second magnetic recording / reproducing device moves the magnetic tape to the head of the recording area of the magnetic tape. An operation such as rewinding is performed.

In implementing the recording / reproducing apparatus of the present invention, the recorded magnetic field to be reproduced in the first recording / reproducing apparatus 5 (or the first magnetic recording / reproducing apparatus 5 shown in FIG. 2). The signal of the first one frame period to be predetermined on the tape as the recording start portion of the program desired to be reproduced is:
For example, the maximum rewinding time of the magnetic tape in the first recording / reproducing device 5 (or the first magnetic recording / reproducing device 5... In the case of FIG. About 2 minutes in the above example), and
From the state where the first recording / reproducing apparatus 5 (or the first magnetic recording / reproducing apparatus 5... In the case of FIG. 2) completes the rewinding operation of the magnetic tape, the video signal of the program desired to be reproduced is selectively switched to reproduce. It is a signal of one frame period after a predetermined reproduction time set corresponding to the sum of the time required to start the reproduction, or, for example, one frame period of the head portion of the program desired to be reproduced. , And so on.

The first recording / reproducing device 5 (or the first magnetic recording / reproducing device 5... In the case of FIG. 2) is predetermined as a recording start portion of a program desired to be reproduced on a recorded magnetic tape to be reproduced. When the signal of the first frame period is the case described above, the control unit 4
Output signal switching unit 7 according to the switching control signal supplied from
The output signal from the second recording / reproducing device 6 (or the second magnetic recording / reproducing device 8... In the case of FIG. 2) and the first recording / reproducing device 5 (or the first magnetic recording / reproducing device 5. 2), the first recording / reproducing device 5 (or the second recording / reproducing device 5 (or the second recording / reproducing device 5 (or the second recording / reproducing device)) as illustrated in FIGS. This is performed immediately after the maximum rewind time of the magnetic tape in the magnetic recording / reproducing device 1 (in the case of FIG. 2) (about 2 minutes in the above-described example).

That is, in the above case, the first recording / reproducing device 5 (or the first magnetic recording / reproducing device 5... In the case of FIG. 2) completes the magnetic tape rewinding operation, The sum of the time required to start reproduction by selectively switching the video signal of the program is determined by the above-described first recording / reproducing device 5 (or the first magnetic recording / reproducing device 5... In the case of FIG. 2). This is because the rewinding operation time of the tape is substantially equal to the operation time. FIG. 11 is an explanatory diagram in the case of the above-described operation example in the recording / reproducing apparatus shown in FIG. Next, the first recording / reproducing device 5 (or the first magnetic recording / reproducing device 5... In the case of FIG. 2) is predetermined as a recording start portion of a program desired to be reproduced on a recorded magnetic tape to be reproduced. When the signal of the first one frame period is the case described above, a second control performed by the output signal switching unit 7 by the switching control signal supplied from the control unit 4.
Of the recording / reproducing device 6 (or the second magnetic recording / reproducing device 8 ...)
2) and the first recording / reproducing device 5
The switching operation with the output signal from the first magnetic recording / reproducing device 5 (in the case of FIG. 2) is performed as follows.

That is, the first recording / reproducing device 5
2 (or the first magnetic recording / reproducing device 5... In the case of FIG. 2) has completed the operation of rewinding the magnetic tape, that is,
Of the recording / reproducing device 5 (or the first magnetic recording / reproducing device 5 ...)
After the maximum rewind time of the magnetic tape (in the case of FIG. 2) (about 2 minutes in the above-described example) has elapsed, the recorded magnetic tape is brought into the fast-forward state, and the magnetic tape recorded on the recorded magnetic tape is moved to the fast-forward state. Based on the information (for example, a control signal) related to the position in the longitudinal direction, a video signal of a program desired to be reproduced is selectively switched to search for a frame after a required time to start reproduction, and a standby state is established. The second recording / reproducing apparatus 6 (or the second magnetic recording / reproducing apparatus 8... In the case of FIG. 2) ends the predetermined reproducing time. FIG. 10 is an explanatory diagram in the case of the above-described operation example in the recording / reproducing apparatus shown in FIG.
3 is an explanatory diagram in the case of the above-described operation example in the recording / reproducing apparatus shown in FIG. Each of FIGS. 10 and 12 (c) shows an operation mode of the first recording / reproducing apparatus.

The above-described reproducing operation in the recording / reproducing apparatus of the present invention described above with reference to FIGS. 1 and 2 uses information for designating a program to be reproduced by the operator on the operation unit 3. Start by typing. That is, when the operator inputs designation information of a program to be reproduced by using an input means provided on the operation unit 3, for example, a keyboard or a mouse, the control unit 4 causes the first recording / reproducing device 5
Both the (VTR 5) and the second recording / reproducing device 6 (or the magnetic recording / reproducing device 8) receive signals for starting the search operation and the reproducing operation [see each (a) diagram in FIGS. 10 to 12]. give. Thereby, the first recording / reproducing device 5 (V
TR5) and the second recording / reproducing device 6 (or the magnetic recording / reproducing device 8) start the search operation and the reproducing operation.

As described above, the second recording / reproducing apparatus (auxiliary recording / reproducing apparatus) 6 used in the recording / reproducing apparatus shown in FIG. 1 is, for example, a recording / reproducing apparatus using various types of disks, or a semiconductor memory. As in the case of the apparatus, the structure is such that the access is quick and the reading of the program desired to be reproduced can be performed in a short time, so that the second recording and reproducing apparatus (auxiliary recording and reproducing) in the recording and reproducing apparatus shown in FIG. Device) 6
Is a signal supplied from the control unit 4 for starting the search operation and the reproduction operation [each of (a) in FIGS.
As shown in FIG. 10, the head position of the recording part of the program desired to be reproduced is immediately searched, and the reproducing operation is started from the head part of the desired program, and the reproduction output signal [each (b) in FIGS. A period during which a reproduction signal is generated is shown in the figure].

In response to the switching control signal supplied from the control unit 4, the output signal switching unit 7 raises a signal (see each (a) in FIGS. 10 and 11) for starting a search operation and a reproduction operation. The second recording / reproducing device 6
Has been switched to a state in which the reproduction output signal from the second terminal can be transmitted to the output terminal 2. Therefore, as described above, the head portion of the program desired to be reproduced outputted from the second recording / reproducing apparatus (auxiliary recording / reproducing apparatus) 6 Are output to the output terminal 2 immediately after the signal for starting the search operation and the reproduction operation described above (FIGS. 10 and 11A). The period during which the reproduction signal of the program desired to be reproduced is output from the second recording / reproducing apparatus (auxiliary recording / reproducing apparatus) 6 starts from the time when the reproduction of the head portion of the program desired to be reproduced starts (FIG. 10 and FIG. 11). b) This is a period that is set longer than the period shown as the period of τ seconds in the figure.

The period of τ seconds is the first period as described above.
From the state in which the recording / reproducing apparatus 5 (VTR 5) has completed the rewinding operation of the magnetic tape, and the time required for the video signal of the program desired to be reproduced to be selectively switched and reproduced to be started. This is a predetermined playback time. While the second recording / reproducing apparatus 6 performs the reproducing operation for the time of τ seconds, the first recording / reproducing apparatus 5 is also illustrated in each of FIGS. As in the normal playback operation state.
The control unit 4 outputs a switching control signal to the output signal switching unit 7 after a lapse of τ seconds from the time when the reproduction signal of the program desired to be reproduced is started to be output from the second recording / reproducing device (auxiliary recording / reproducing device) 6. From the output signal switching unit 7 to the output terminal 2
Is switched to a signal reproduced from the first recording / reproducing device 5.

As a result, as shown in FIGS. 10 and 11 (g), the control unit 4 sends the first and second recording signals from the output terminal 2 of the recording / reproducing apparatus shown in FIG. Immediately after the signals [FIG. 10 and FIG. 11 (a) in FIG. 10] that cause the reproducing devices 5 and 6 to start the search operation and the reproduction operation are supplied, the signal of the reproduction desired program is output. Become. The measurement of the time of τ seconds is performed by counting the control pulses exemplified in each of FIGS. 10 and 11 (d). The switching position between the reproduction signal from the second recording / reproducing device 6 and the reproduction signal from the first recording / reproducing device is also related to the position in the longitudinal direction of the reproduced magnetic tape from the beginning of the program desired to be reproduced. It is determined based on a control pulse used as information. The operation for selecting a predetermined program in the first recording / reproducing apparatus is performed based on the identification signal reproduced from the recorded magnetic tape as described above with reference to FIG.

Next, as the first and second recording / reproducing devices in the recording / reproducing device shown in FIG. 2, magnetic recording / reproducing devices (VTRs) 5 and 8 are both used, so that FIG. Unlike the recording / reproducing apparatus described above, the first and second magnetic recording / reproducing apparatuses 5 and 5 to which the signal (see FIG. 12A) for starting the search operation and the reproducing operation are supplied from the control unit 4 are provided. 8, (b) and (c) of FIG.
In both cases, the rewinding operation is started.
Then, the rewinding operation in the second magnetic recording / reproducing device 8 is completed in a short time, and immediately searches the head position of the recording portion of the program desired to be reproduced, and starts the reproducing operation from the head portion of the desired program. Starting, the reproduction output signal [FIG. 12 (b) shows the period during which the reproduction signal is generated]
To the output signal switching unit 7.

The control unit 4 detects the end of the rewinding operation in the second magnetic recording / reproducing device 8 based on the state of the control signal reproduced from the second magnetic recording / reproducing device 8, and After the end of the rewinding operation in the recording / reproducing device 8, a switching control signal for switching the output signal switching unit 7 to a state in which the reproduction output signal from the second magnetic recording / reproducing device 8 can be sent to the output terminal 2. Supply. Thus, the output signal switching section 7 can transmit the reproduction output signal of the second magnetic recording / reproducing device 8 to the output terminal 2 from the time when the second magnetic recording / reproducing device 8 starts the reproducing operation. . As described above, the reproduction output signal from the beginning of the program desired to be reproduced, which is output from the second magnetic recording / reproducing device 8, is a signal for starting the above-described search operation and reproduction operation [FIG. 12 (a)]. Is sent to the output terminal 2 after a short time has passed. The period during which the reproduction signal of the program desired to be reproduced is output from the second magnetic recording / reproducing device 8 starts from the start of reproduction of the head portion of the program desired to be reproduced.
This is a period set longer than the period shown as the period of τ seconds in FIG.

The period of τ seconds is the first period as described above.
Of the magnetic recording / reproducing apparatus 5 (VTR 5) corresponding to the sum of the time required for the video signal of the program desired to be reproduced to be selectively switched and the reproduction to be started after the rewinding operation of the magnetic tape is completed. This is a predetermined playback time that has been set. Then, while the second magnetic recording / reproducing device 8 performs the reproducing operation for the time of τ seconds, the first magnetic recording / reproducing device 5 is also illustrated in FIG. As described above, the normal reproduction operation state at the predetermined switching portion is entered by the fast forward operation. Then, the control unit 4 gives a switching control signal to the output signal switching unit 7 after a lapse of τ seconds from the time when the reproduction signal of the reproduction desired program is started to be output from the second magnetic recording / reproducing device 8, and The reproduction output signal sent from the signal switching unit 7 to the output terminal 2 is switched to a signal reproduced from the first magnetic recording / reproducing device 5.

As a result, as shown in FIG. 12 (g), the control unit 4 sends the first and second magnetic recording devices 5, 8 from the output terminal 2 of the recording / reproducing device shown in FIG. The signal of the program desired to be reproduced is output shortly after the signal [FIG. 12 (a)] for starting the search operation and the reproduction operation is supplied. The measurement of the time of τ seconds is performed by counting the control pulses exemplified in FIG. 12D.
Also, the reproduction signal from the second magnetic recording / reproducing device 8 and the first
The switching position of the reproduction signal from the magnetic recording / reproducing device 5 is also determined based on the control pulse used as information relating to the position in the longitudinal direction of the reproduced magnetic tape from the beginning of the program desired to be reproduced. The operation for selecting a predetermined program in the first and second magnetic recording / reproducing apparatuses 5 and 8 is based on the identification signal reproduced from the recorded magnetic tape as described above with reference to FIG. Done.

[0068]

As is apparent from the above description, the recording / reproducing apparatus of the present invention can quickly select and reproduce a program even with a general consumer VTR having no address recording / reproducing function. The present invention can solve the above-mentioned conventional problems.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a recording / reproducing apparatus of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a recording / reproducing apparatus of the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a magnetic recording / reproducing apparatus used in the recording / reproducing apparatus of the present invention.

FIG. 4 is a diagram for explaining the operation.

FIG. 5 is a diagram for explaining the operation.

FIG. 6 is a diagram for explaining the operation.

FIG. 7 is a diagram of a track pattern for explaining an operation.

FIG. 8 is a diagram of a track pattern for explaining the operation.

FIG. 9 is a diagram of a track pattern for explaining an operation.

FIG. 10 is a time chart for explaining the operation.

FIG. 11 is a time chart for explaining the operation.

FIG. 12 is a time chart for explaining the operation.

[Explanation of symbols]

T: magnetic tape, Dd: lower drum, Du: rotating drum (upper drum), Mc: capstan motor, Md: drum motor, Ha, Hb: rotating magnetic head, 3: operation unit,
4 control unit, 5 first recording / reproducing device, 6, 8 second recording / reproducing device, 7 output signal switching unit, 11 capstan, 12 rotational phase detector, 13 phase comparator, 14 ...
Amplifier, 24 control signal generator, 25 rotational phase detector, 26 audio head, 27 control head, 28 recording / reproducing signal processing circuit,

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Teruo Takahashi 3-12-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside Japan Victor Company of Japan (72) Inventor Shigeru Kawase 3-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Address JVC

Claims (6)

[Claims] 1. A rotating drum provided with a pair of rotating magnetic heads having opposite azimuth angles at 180-degree symmetric positions is rotated at a predetermined number of rotations, and the peripheral surface of the rotating drum is rotated. When a magnetic tape running at a predetermined running speed V while being wound around a part of the magnetic head is sequentially and alternately helically scanned by the pair of rotary magnetic heads, each of the rotary magnetic heads is rotated by 180 degrees. In a magnetic recording / reproducing apparatus capable of sequentially forming successive recording traces by a video signal of one field period to be recorded successively on a magnetic tape in correspondence with the rotation of the magnetic tape, the traveling speed of the magnetic tape is reduced. As (2N-1) V (where N is a natural number of 2 or more), the recording traces of the (2N-1) programs to be recorded and reproduced by the video signals of the individual programs are the individual traces described above. For each program Recorded traces by the signal of the first frame period determined in advance as a recording start portion Te is, are sequentially arranged in a predetermined arrangement order at the beginning of the magnetic tape,
In addition, the recording traces are arranged for every (2N-1) recording traces in a fixed repetition order, and the recording traces by the video signal in the odd field period and the recording traces by the video signal in the even field period are formed adjacent to each other. In addition, at least information for individually identifying the recording traces of the (2N-1) programs and information relating to the longitudinal position of the magnetic tape can be recorded. 1) A magnetic recording / reproducing apparatus configured to sequentially reproduce recording tracks of selected individual programs in recording tracks of individual programs is provided as a first recording / reproducing apparatus.
The magnetic tape in the first recording / reproducing apparatus for at least all the video signals individually corresponding to the (2N-1) programs to be recorded / reproduced by the first recording / reproducing apparatus. Record longer than the maximum rewind time of
The time required for selecting the video signal of the program to be reproduced from the video signals of the recorded programs and starting the reproduction is determined by the video of each program in the first recording and reproducing apparatus. A recording / reproducing apparatus capable of starting reproduction in an extremely short time as compared with a time required until a video signal of a program to be reproduced is selected from the signals and the reproduction can be started. (2N-
1) When a video signal of a program desired to be reproduced is selected from among the plurality of programs and reproduced from the first recording / reproducing apparatus, the first
And the second recording / reproducing apparatus and the second recording / reproducing apparatus simultaneously start the search operation and the reproducing operation for the same reproduction desired program, select the output signal of the second recording / reproducing apparatus, and perform reproduction output. And a means for selecting an output signal from the first recording / reproducing apparatus and outputting the reproduced signal after a reproduction output for a predetermined time is output from the second recording / reproducing apparatus. Recording and playback device. 2. The recording / reproducing apparatus according to claim 1, wherein a recording apparatus including one of a magnetic disk, a magneto-optical disk, and a semiconductor memory is used as the second recording / reproducing apparatus. 3. A rotating drum provided with a pair of rotating magnetic heads having opposite azimuth angles at 180-degree symmetrical positions is rotated at a predetermined number of revolutions, and a peripheral surface of the rotating drum is provided. When a magnetic tape running at a predetermined running speed V while being wound around a part of the magnetic head is sequentially and alternately helically scanned by the pair of rotary magnetic heads, each of the rotary magnetic heads is rotated by 180 degrees. In a magnetic recording / reproducing apparatus capable of sequentially forming successive recording traces by a video signal of one field period to be recorded successively on a magnetic tape in correspondence with the rotation of the magnetic tape, the traveling speed of the magnetic tape is reduced. As (2N-1) V (where N is a natural number of 2 or more), the recording traces of the (2N-1) programs to be recorded and reproduced by the video signals of the individual programs are the individual traces described above. For each program Recorded traces by the signal of the first frame period determined in advance as a recording start portion Te is, are sequentially arranged in a predetermined arrangement order at the beginning of the magnetic tape,
In addition, the recording traces are arranged for every (2N-1) recording traces in a fixed repetition order, and the recording traces by the video signal in the odd field period and the recording traces by the video signal in the even field period are formed adjacent to each other. In addition, at least information for individually identifying the recording traces of the (2N-1) programs and information relating to the longitudinal position of the magnetic tape can be recorded. 1) Each of the two magnetic recording / reproducing devices configured to be able to sequentially reproduce the recording traces of the selected individual programs in the recording traces of the individual programs is a first magnetic recording / reproducing device.
Provided as a second magnetic recording / reproducing device, and (2N-
1) When a video signal of a program desired to be reproduced is selected from among the programs and reproduced from the first magnetic recording / reproducing apparatus,
The first magnetic recording / reproducing apparatus and the second magnetic recording / reproducing apparatus simultaneously start the search operation and the reproducing operation for the same desired reproduction program, and select the output signal of the second magnetic recording / reproducing apparatus. And a first magnetic recording / reproducing apparatus for rewinding the magnetic tape to the beginning of the recording area of the magnetic tape and then recording the signal of the program desired to be reproduced. Is selected, and the operation shifts to a reproducing operation. After the second magnetic recording / reproducing device outputs a reproduction output for a predetermined time, an output signal from the first magnetic recording / reproducing device is selected and reproduced. Means to output,
Means for rewinding the magnetic tape to the head of the recording area of the magnetic tape by the second magnetic recording / reproducing apparatus when the output signal from the first magnetic recording / reproducing apparatus is selected and reproduced and output. Recording and playback device. 4. The recording / reproducing apparatus according to claim 1, wherein a control pulse recorded on a control track of the magnetic tape is used as the information relating to the longitudinal position of the magnetic tape. 5. A signal of a first one frame period which is predetermined as a recording start portion of a program desired to be reproduced is recorded on a magnetic tape to be reproduced in the first recording / reproducing apparatus. When the signal is a frame signal after a time corresponding to the maximum rewind time of the magnetic tape in the first recording / reproducing device from the beginning of the program, the reproduction output of the second recording / reproducing device is applied to the first recording / reproducing device. 4. The recording / reproducing apparatus according to claim 1, wherein the selection switching to the reproduction output is performed at a point in time when a recording track on which a signal of a program desired to be reproduced is recorded is selected after the magnetic tape is rewound. . 6. A signal for the first one frame period predetermined as a recording start portion of a program desired to be reproduced is recorded on a magnetic tape to be reproduced in the first recording / reproducing apparatus. The selection switching from the reproduction output of the second recording / reproducing apparatus to the reproduction output of the first recording / reproducing apparatus when the signal is the signal of the first frame of the program is performed after the magnetic tape has been rewound. The magnetic tape is fast-forwarded from the beginning of the program being played to the position of the recording trace by the signal of the frame after the time corresponding to the maximum rewind time of the magnetic tape in the first recording / reproducing apparatus, and the signal of the program desired to be reproduced is obtained. 4. The recording / reproducing apparatus according to claim 1, wherein recording is performed at a time when a recorded trace is selected.