JP3123111B2 - Duplication tape creation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of making a plurality of duplicate tapes by simultaneously sending a plurality of tape recorders to record video and audio signals from video and audio signal sources. Related to the device.

[0002]

2. Description of the Related Art The term "duplicate tape producing apparatus" as used herein refers to a copy machine or dubbing machine for simultaneously producing a plurality of so-called video soft tapes. More specifically, video and audio signals from a master VTR (video tape recorder) or a video disk player, which are video and audio signal sources, are sent to a plurality of slave VTRs for simultaneous recording (copying or dubbing). Is what you do.

In such a duplication tape producing apparatus, an operator manages the operation state of a plurality of slave-side VTRs or the like, repairs a VTR that does not operate normally, or records (records) the VTR. Are performed one by one, and an inspection or the like is performed to remove a video tape on which normal recording was not performed. In particular, if a video tape on which recording is not normally performed is shipped as a product (soft tape), adverse effects such as a decrease in the reliability of the product are caused. Therefore, all recorded tapes are inspected. It is desired.

[Problems to be solved by the invention]

When a so-called soft tape is created using the above-described duplication tape creating apparatus,
As the number of slave-side VTRs increases, the work becomes more troublesome, and a large number of labors are required. For example, when a plurality of shelves on which slave-side VTRs are arranged are provided, it is not possible to determine at a glance which VTR is in poor condition, and a small number of workers may not be able to perform sufficient management. Conceivable. To check whether dubbing was performed normally, check the recorded tapes one by one
It requires time and effort to regenerate and monitor the data, which is an obstacle to improving mass production efficiency.

[0005] The present invention has been proposed in view of such circumstances, and the recording results recorded by a plurality of slave VTRs are inspected on each VTR side so that the inspection results can be easily confirmed. Aiming to provide a simple duplicate tape creation device

[0006]

SUMMARY OF THE INVENTION A duplication tape producing apparatus according to the present invention transmits a plurality of duplication tapes by sending video and audio signals from video and audio signal sources to a plurality of tape recorders and recording them. A remote control unit connected via a bidirectional control signal line for transmitting and receiving control signals to and from the plurality of tape recording devices, and a test signal for outputting a recording test signal; Supply means, and a recording result inspection means provided in each tape recording device for inspecting a recording result of each of the tape recording devices, wherein the remote control unit includes the plurality of tape recording devices. The test signal from the test signal supply means is sent to and recorded, the recorded portion is reproduced, and the recording result inspection means By causing the 査 solves the problems described above.

[0007]

The recording result inspection means provided in each of the plurality of tape recording devices inspects the recording result of the test signal, so that the normal recording can be performed only by checking the inspection result of each tape recording device. It can be easily confirmed whether or not the operation has been performed.

[0008]

FIG. 1 shows a schematic configuration of an embodiment of a duplicate tape producing apparatus according to the present invention. In the duplication tape producing apparatus of the embodiment shown in FIG. 1, a master VTR (video tape recorder) 1 as a video and audio signal source has, for example, a so-called D-2 format digital VTR.
TR is used. The video signal V from the master VTR 1 and the two-channel audio signals A ₁ and A ₂ corresponding to the left and right channels of the stereo are respectively transferred to a plurality of tape recording devices, for example, n VTRs _{10 1} and 1.
0 _2, ..., by sending recorded in 10 _n-1, 10 _n, are creating multiple (e.g., n lines) duplicate tapes at the same time. Specifically, each signal from the master VTR ₁ is sent to the distributors 51 to 5 _m via the changeover switch 2,
VTR10 of n units through these distributor 5 ₁ to 5 _{m 1}
N10 _n . If the master VTR1 is a digital VTR, for example each distributor 5 ₁ in to 5 _m D / A converters are provided. Changeover switch 2
Are a video signal V from the master VTR 1 and audio signals A ₁ and A _{2 of} two channels, and a test video signal V and an audio signal A from the test signal generation circuit 3.
₁ and A ₂ are selected and output, and the n VTRs 1
Send to 0 ₁ to 10 _n .

A remote control unit for transmitting and receiving control signals to and from these plural (n) tape recorders via one bidirectional control signal line BDL such as a so-called BNC coaxial cable. 20 are connected.
Here, the n VTRs 101 to _{1 are connected} to _one bidirectional control signal line BDL via a so-called T-branch connector.
0 _n is connected. The remote control unit 20 is connected to a host CPU 31 via a bus line conforming to, for example, the so-called RS-232C serial interface standard.
I / O terminal device 3 having 2C and key input device 32K
2 are connected. The remote control unit 20 includes
For example, the operation unit 3 via a so-called RS-232C
3 are connected. This operation unit 3
Reference numeral 3 denotes an arrangement of operation keys and the like for so-called remote control operation of the VTR. Further, a printer 34 for data printing is connected to the remote control unit 20. The host CPU 31 controls the remote control unit 4 for controlling the operation of the master VTR 1 and controls the switching of the switch 2.

A video signal V, an RF signal RF, and two-channel audio signals A ₁ and A ₂ corresponding to stereo left and right channels from each of the VTRs 10 ₁ to 10 _n are
A common video signal line, an RF signal line, and an audio signal line of two channels are collected, respectively, and, via the remote control unit 20, a monitor TV (monitor television receiver) 35, waveform monitor devices 36, and 2
Sent to the audio amplifier 37 of each channel,
The two-channel audio signal from the audio amplifier 37 is sent to an oscilloscope 38. These monitors TV 35, waveform monitor 36, and an oscilloscope 38, a video signal V from the one specified by the remote control unit 20 of the n-number of VTR 10 ₁ to 10 _n, RF signals RF, and two-channel This is for monitoring the audio signals A ₁ and A ₂ and observing the signal waveform. The monitor TV 35 can also display data and the like transmitted and received via the bidirectional control signal line BDL by a so-called superimpose.

Next, in one arbitrary VTR (for example, VTR _{10 1} in the figure), the bidirectional control signal line BDL is provided.
Interface circuit 11 connected is provided, this interface circuit 11, the operating state detection circuit 12 for outputting the operating state information by detecting the VTR 10 ₁ operating state (such as a recording mode or a reproducing mode), video At least a recording result inspection circuit 13 for inspecting whether or not recording on the tape has been performed normally and outputting inspection result information is connected.

The remote control unit 20 includes a plurality of VTRs.
Control signal to the desired operating mode for 10 ₁ to 10 _n, for example, transmits the recording mode control signal, it is possible to switch control to the recording mode at the same time for all of these VTR 10 ₁ to 10 _n. More specifically, a plurality of V
TR10 ₁ to 10 _n are grouped for each desired number,
The operation mode control can be simultaneously performed on all the VTRs in any one of the plurality of groups. In addition, the remote control unit 20
Any desired _{one of 1} to 10 _n , for example, VTR1
0 _by selected, to send a detection signal from the operating state detection circuit 12 of the designated VTR 10 _1, the specified VTR 10 ₁ based on the signal said detectable is determined whether or not in the recording mode be able to.

Here, for example, a maximum of 1000 VTRs can be connected to the remote control unit 20, and these VTRs can be divided into, for example, up to 100 groups and controlled, and the number of VTRs in one group can be controlled. Maximum value is also 10
00 units. However, up to 1000 VTRs
Since it is desirable that the communication hardware provided for each is as simple as possible, so-called collision detection is not performed. At this time, since it is not possible to determine that an error occurs when a plurality of VTRs output data on one bidirectional control signal line BDL, the remote control unit 20 has the initiative of communication. ing. That is, the remote control unit 20 sends a command by specifying the identification number (so-called ID) of the VTR with which communication is to be performed. The designation of the identification number of the VTR includes the individual designation and the group designation. Further, the modulation frequency of the transmission signal from the remote control unit 20 and the modulation frequency of the transmission signal from each of the VTRs 10 ₁ to 10 _n are different from each other.

As described above, so-called frequency multiplexing in which transmission and reception frequencies are different from each other, and VTRs 10 ₁ to 10
_n is used in combination with time division multiplexing so that transmission is performed only in response to a signal from the remote control unit 20 to avoid duplication of signals on the bidirectional control signal line BDL. ing. The time division multiplexing means that the remote control unit 20 stops transmitting for a certain period of time after transmitting a control signal for requesting a response to the VTR, and
The system waits for a response from the TR, and on the VTR side, when a response request is received from the remote control unit 20, a response signal is transmitted during the above-mentioned predetermined waiting time.

The recording result inspection circuit 13 of each of the VTRs 10 ₁ to 10 _n determines whether or not the recording has been normally performed in accordance with the signal when the tape on which the signal has been recorded is reproduced. If not performed, for example, the VTR
Is forcibly turned off (auto-off) and an alarm display (auto-off display) is performed. This recording result inspection information is output in response to a request signal from the remote control unit 20 and sent to the remote control unit 20. In this case, the remote control unit 20 controls all the VTRs 10 ₁ to 10
Each record result inspection information is requested by sequentially specifying _n . The obtained recording result inspection information is displayed on the CRT monitor 32C, the monitor TV 35, or the like, and printed out to the printer 34 as necessary.

FIG. 2 is a block circuit diagram schematically showing the internal configuration of the bidirectional remote control unit 20 and an optional VTR 10. In FIG. 2, a remote control unit 20 includes a command processing circuit 21 for transmitting and receiving a command to and from the host CPU 31, a command execution circuit 22 connected to the command processing circuit 21, and a command execution circuit. And a VTR control circuit 23 for controlling the VTR in accordance with a command to be executed. A display processing circuit 24 is connected to the command execution circuit 22, and a display processing output signal from the display processing circuit 24 is sent to the operation unit 33 and the printer 34. From the operation unit 33, a command signal output by operating the operation keys and the like is sent to the command processing circuit 21. From the display processing circuit 24, data (superimpose data) for superimpose display on the display screen of the monitor TV 35 is sent to the superimpose processing circuit 25, and is superimposed on the video signal from the VTR 10 to be monitored. It is sent to TV35.

The VTR control circuit 23 is connected to the bidirectional control signal line BDL via the bidirectional communication circuit 26, and the bidirectional control signal line BDL is connected to the bidirectional communication interface circuit 11 of the VTR 10. . The interface circuit 11 includes the operation state detection circuit 12
And the inspection result information from the recording result inspection circuit 13, and various data are transmitted and received between the interface circuit 11 and the system controller 14 of the VTR. The system controller 14 sends, for example, servo lock information during dubbing recording, monitor RF level information, and the like to the operation state detection circuit 12 to determine whether or not the recording operation is in a normal state. The presence / absence of an RF signal, the level of a video signal, and the like when the recorded portion is being reproduced are sent to the recording result inspection circuit 13 to check whether or not the normal recording has been performed.

FIG. 3 is a block circuit diagram for explaining a bidirectional communication operation between the bidirectional remote control unit 20 and each of the VTRs 10 ₁ , 10 ₂ ,. In FIG. 3, control signals from the VTR control circuit 23 and the like in FIG.
, And is modulated at a first modulation frequency, for example, 800 kHz. This modulation frequency (800 kHz)
(Band pass filter) with the pass center frequency
The signal is sent to the buffer amplifier 27c via the buffer 27c. The output signal from the buffer amplifier 27c is sent to the bidirectional control signal line BDL via the switch 27d and the resistor 27e. The connection point with the bidirectional control signal line BDL in the bidirectional remote control unit 20 is grounded via a resistor 27f of, for example, 75Ω for impedance matching.
In this manner, the control signal from the bidirectional remote control unit 20 is applied to each VTR via the bidirectional control signal line BDL.
Are sent to 10 ₁ , 10 ₂ ,.

Each of the VTRs 10 ₁ , 10 ₂ ,... Has a similar configuration. For example, in the VTR 101, _one end of a switch 17a is connected to the bidirectional control signal line BDL, and the other end of the switch 17a is grounded via a resistor 17b for impedance matching, for example, 75Ω, and via a switch 17c. Also, the switch 17a
Is sent to the BPF 17e having the first modulation frequency (for example, 800 kHz) as a pass center frequency via the buffer amplifier 17d, and a signal near the first modulation frequency is extracted. The signal is sent to the demodulation circuit 17f. The demodulation circuit 17f demodulates the signal modulated at the first modulation frequency, and sends the demodulated signal to a system controller or the like via the interface circuit or the like. The switch 17a is connected to the bidirectional control signal line BDL
By turning on only the VTR connected to the last end of the transmission line, the impedance of the transmission line is matched. All the switches 17a of the VTRs at other positions on the transmission line are turned off.

On the VTR side (system controller or the like), the transmitted control signal is transmitted to all VTRs.
If the response is required, the VTR is controlled in response to the control signal, and a response signal is generated when a response is required. For example, it is an operation state detection signal from the operation state detection circuit 12 of FIG. This response signal corresponds to the first
Is transmitted to the modulation circuit 18a having a second modulation frequency different from the modulation frequency (for example, 200 kHz), and is modulated. The buffer amplifier passes through the BPF 18b having a pass frequency band near the second modulation frequency (200 kHz). 1
8c. The output signal from the buffer amplifier 18c is sent to the switch 18e via the resistor 18d. The switch 18e is turned on / off in response to a control signal from a control input terminal 18f. The response signal from the switch 18e is
7a to the bidirectional control signal line BDL. Here, the BP in each VTR 10 ₁ , 10 ₂ ,.
F17e and the BP in the interactive remote control unit 20
F27b is set to have a frequency characteristic that blocks the signal of the second modulation frequency (200 kHz).

Such a second modulation frequency (for example, 20
0 kHz) is sent to the bidirectional remote control unit 20 via the bidirectional control signal line BDL, and is passed through the buffer amplifier 28a to the LPF (low-pass) passing near the second modulation frequency. Filter) 28b. When the second modulation frequency is, for example, 200 kHz, the cutoff frequency of the LPF 28b is 400
kHz, and is set so as to block the signal of the first modulation frequency (for example, 800 kHz).
The signal near the second modulation frequency extracted from the LPF 28b is sent to the demodulation circuit 28c and demodulated.

Here, a specific example of a communication specification of a signal via the bidirectional control signal line BDL will be described. In a start-stop synchronous full-duplex communication system, a data unit is 8 bits, odd parity, baud rate 38400 bps. And
The communication hardware between the bidirectional remote control unit 20 and each VTR does not perform so-called collision detection, and the bidirectional remote control unit 20 becomes the master and has the initiative of communication. That is, the bidirectional remote control unit 20 specifies the ID (identification number) of the VTR and the like, and then sends the actual command. The ID of the VTR includes an individual designation and a group designation. Only immediately after a command is sent by the individual designation, a status for the command can be returned. Since communication performed between the interactive remote control unit 20 and the VTR is one-to-many communication, handshaking such as returning a so-called NAK for a communication error cannot be performed. Therefore, by sending the same data a plurality of times, the probability of data loss due to a communication error is reduced.

FIG. 4 shows a specific example of the communication format. In FIG. 4, a 1-byte communication start signal STX, a 1-byte error correction protocol format number PN (1 is a format number), a 1-byte serial number SN, and a 3-byte indicating the ID of the VTR are sequentially provided from the top. I
D, numeric value DN indicating the number of bytes in the data part, data part DA
TA, checksum SU indicating the total value of this data part
M and a communication end signal ETX are arranged. The serial number SN is incremented by 1 for each command, and the receiving side uses this field as a command delimiter. Also, 3 bytes of the ID field of the VTR are
In the case of individual designation, the first byte represents the thousands and thousands places by the upper and lower 4 bits, respectively, the second byte represents the hundreds and tens places by the respective 4 bits, and the upper 4 bits of the third byte.
The bit represents the ones digit. The lower 4 bits of the third byte are 0
It has become. In the case of the group designation, the first byte represents 255, the second byte represents 0, and the third byte represents a group number.

When transmitting data from the bidirectional remote control unit 20 to the interface circuit of the VTR based on such a format, the data "1" at the baud rate of 38.4 kbps is converted into a burst signal of 800 kHz.
So-called ASK to make "0" correspond to 0V state
(Amplitude shift keying) and send it to the bidirectional remote control unit 20 from the VTR interface circuit.
When the data is transmitted, the data "1" is transmitted to a burst signal of 200 kHz, which is modulated so that "0" corresponds to the 0V state.

Here, after the bidirectional remote control unit 20 is powered on, the connection VTR is confirmed through processing such as self-diagnosis and initialization of the unit 20. This is to confirm whether or not a connection is made to the VTR specified in the VTR-ID range.
The following operation is performed for each unit from the number to the maximum ID number. That is, a VTR-ID designation command is transmitted, and a response (A
CK) and determines / registers the connection VTR. The connection confirmation time for each unit is, for example, within 30 msec, and multiplied by the number of designated VTRs is the total connection confirmation time. Connection determination is 10ms after command transmission
If the ACK is returned within ec, it is regarded as “connection” and 1
When there is no response within 0 msec or when a NAK response is returned, another retry is performed, and "not connected" is set.

Next, the initial setting of the main body of the interactive remote control unit 20, the connection confirmation with the operation unit 33,
The title screen is displayed, and the basic state of the normal operation is established. By the command key input operation from the basic state, a registration state of the number of VTRs, a VTR mode setting state, a time setting state, a VTR self-diagnosis state, a VTR status display state, a user ID setting state, and a VTR-ID setting state are respectively set. Can be migrated. If an error occurs during key input, the state shifts to an error state. The key input operation is performed by the operation unit 33. When the host CPU 31 is connected, the key input operation is generally performed by the key input device 32K of the input / output terminal device 32. The display in each state is mainly superimposed display on the screen of the monitor TV 35, but is also performed by display on the display unit on the operation unit 33, the CRT monitor 32C, and printout to the printer 34. .

In the basic state, each operation of controlling the VTR to be controlled, displaying the operation state of the signal selection VTR, incrementing and decrementing the VTR-ID, and shifting to each of the above states is performed. Here, the controlled VTR is VT
The VTR selected in the R-ID range indicates a control target. When the group is specified, all VTRs in the group whose connection has been confirmed are used. When individually specified, the VTR is specified regardless of the connection confirmation (connection presence / absence). The signal selection VTR indicates a VTR that selects the video signal, the audio signal, and the RF signal among the VTRs selected in the VTR-ID range. Particularly, a VTR for displaying an image on the monitor TV 35 is shown. In this basic state, the video signal of the signal selection VTR is displayed, the VTR-ID of the signal selection VTR, the status of the signal selection VTR, and the number of VTRs to be controlled are displayed. The operation state of these signal selection VTRs and the state of the control target VTR are monitored, and the display is changed. Also,
V is incremented and decremented by VTR-ID.
The display of TR-ID is changed. In this basic state, the VTR operation can be performed by pressing the VTR control operation key.

Next, the status shifts to the VTR status display status by operating, for example, a status key or the like from the basic status. In the VTR status display state, a VTR setting state, a VTR error state, and a time meter are displayed. At this time, the data can be printed out by the printer 34. In the VTR error state display, the number of all VTRs in an error state, each VTR-ID in an error state, an error code, and the like are displayed.

Here, the interactive remote control unit 20
Confirms connection, operation status,
Check the error status. The monitoring is performed on the control target VTR, but mainly monitors the signal selection VTR. That is, confirmation of the operation state of the signal selection VTR, confirmation of the error state of the signal selection VTR, and confirmation of the error state of VTRs other than the signal selection VTR are repeatedly performed. VTRs other than the signal selection VTR are checked by sequentially scanning the VTR within the VTR-ID range from the minimum ID to the maximum ID. That is, in FIG. 5, the signal packet ST ₁
4 shows a signal having a format as shown in FIG. 4 transmitted from the bidirectional remote control unit 20 via the bidirectional control signal line BDL. As the VTR-ID, for example, the first VTR 10 _Assume that ₁ is specified. The corresponding VTR according to this transmission packet ST ₁
Response signal packet RT ₁ from 10 ₁ is sent via a bidirectional control signal line BDL. Next VT from the transmission of the time allocated to monitor the one (transmission packet ST ₁
The R10 repetition period of up to _two of the designated transmission packet ST ₂ transmission) Ta, for example, a 80 msec. Accordingly, it takes 1000 Ta (for example, 80 sec) to scan, for example, 1000 connected VTRs, and this is the monitoring cycle of any one VTR. Here, the first VTR 10 ₁ the signal selection V
When the TR is a predetermined number of times, and performs monitoring of the signal selection VTR 10 ₁ for example, every 10 times, the monitoring period Tb for the signal selection VTR is 10 ta (for example 80
0 msec). This is because, if the signal selection VTR is monitored only by scanning all the VTRs, the operation state and error state are updated only every 80 seconds, for example, and the correspondence between the image displayed on the monitor and the monitored operation state is determined. This takes into account the deviation.

Here, the operation state of each VTR is detected by the operation state detection circuit 12. In order to monitor the error state, the operation state detection circuit 1 on each VTR side is used.
Statuses to be checked in 2 etc. include tape unthreading, tape trouble, head error, servo alarm,
When there is an item such as a system alarm and the operation mode of the VTR is recording, items such as a recording mode flag, a servo lock, a tape end, a lack of a video signal, and a lack of a synchronization signal are added. Thus, for example, a recording command is sent to all the VTRs, and while the video and audio signals are being recorded from the master VTR 1, that is, while so-called dubbing is being performed, the operation state of each VTR is detected, that is, normal operation is performed. A confirmation is made as to whether or not the recording mode is set. For the VTR in which an error has occurred, the total number, the ID of the VTR, and the error status are displayed or printed out.

Next, an automatic recording result inspection of the VTR, that is, a process of automatically recording a test signal and inspecting the result will be described with reference to FIG. Point P in FIG.
₁ indicates a dubbing start point of the video tape, and this point P ₁
Recording the video software programs among from the point P ₂ a is (dubbing). When dubbing is finished, the host CPU31 shown in FIG 1 controls the bi-directional remote control unit 20, to run the tape at the dubbing end point P ₂ for example fast forward, etc., a predetermined test signal recording start point P Start recording the test signal from ₃ . The test signal is sent from the test signal generation circuit 3 to each VTR via the changeover switch 2, and the test signal generation circuit 3 and the changeover switch 2 are controlled by the host CPU 31. Next, after the host CPU31 causes the recorded test signals between the point P ₄ b, rewind the tape as c, reproduces the d. During playback of this test signal,
The inspection is performed by the recording result inspection circuit 13 shown in FIGS.

The inspection items during reproduction of the recorded test signal include the presence / absence of an RF signal, whether a video / synchronization signal is detected, whether tracking is normal, and
For example, the presence or absence of an audio signal is included. These items are sequentially inspected, and if a failure result is obtained, the V
The power of the TR is turned off (so-called auto-off), and an alarm is displayed by blinking a lamp or the like. In addition, as described above, by sequentially specifying and monitoring each VTR from the interactive remote control unit 20, the number of defective VTRs, the VTR-ID, and the like are displayed and printed out.

In FIG. 6, after the reproduction of d is completed,
rewind the tape as shown in e, the slightly forward position than the point P _3, erases shown in f, it erases to the point P ₅ in a position behind the point P _4, the series of test operations To end. Then, rewind the tape as shown in g, after rewind to the tape start end P _1, and eject eliminating tape from the VTR. On the other hand, the VTR determined to be defective during the test is not removed from the tape by the automatic power-off. by this,
When an operator collects a soft tape created by dubbing, a fatal problem such as collecting a defective tape can be effectively avoided.

FIGS. 7 and 8 show examples of larger-scale system configurations. FIG. 7 shows a system configuration of a control system, and FIG. 8 shows a system configuration of a video and audio signal system. ing. 7 and 8, two bidirectional remote control units 20, 20 for performing, for example, two systems of bidirectional remote control are connected to the system control unit 30. Each of these bi-directional remote control unit 20, 20, VTR 10 ₁ to 10 _1000-by respectively for example 1,000, 10 ₁ -
10 ₁₀₀₀ is one bidirectional control signal line BD
L and BDL. Further, a control unit 4 for master VTR remote control is connected to the system control unit 30, and this control unit 4 is configured to remotely control, for example, eight master VTRs ₁₁ to ₁₈ . The signals from the master VTRs ₁₁ to ₁₈ and the signal from the test signal generating circuit 3 are transmitted via a digital switcher 6 to a signal separation device (decombiner) 8 provided for each rack (VTR installation shelf). Sent to The signal separating device 8 separates, for example, a serially transmitted digital video / audio signal into a video signal V and two-channel audio signals A ₁ and A _2, and the distributors 9 ₁ , 9 ₂ ,. ..Via each V
Are sent to TRs 10 ₁ to 10 ₁₀ , 10 ₁₁ to 10 ₂₀ ,.
One signal separation device 8 is provided for one rack, and the VTRs in this one rack can be set so as to constitute, for example, one group. Signals from different master VTRs can be dubbed for each group, and a plurality of types (eight types in this example) can be dubbed.
Can be created simultaneously. The digital switcher 6 is connected to a system control unit 30 via an interface circuit 7. Other configurations and operations are the same as those of the embodiment shown in FIG.

Next, FIG. 9 shows a part of the front appearance of the system of the duplication tape producing apparatus. The rack 50 for the remote control console, the rack 60 for the master VTR,
And a TR rack 70. The remote control console rack 50 includes monitors TV 51 and 52 corresponding to the monitor TV 35 in FIG. 1, a waveform monitor 53 corresponding to the waveform monitor 36, an oscilloscope 54 corresponding to the oscilloscope 38, and an audio amplifier 55 corresponding to the audio amplifier 37. And so on. Also, the host CP
The U56, the printer 57, the keyboard 58, and the CRT monitor 59 correspond to the devices 31, 34, 32K, and 32C in FIG. 1, respectively. The interactive remote control unit 20 and the operation unit 33 in FIG. 1 correspond to the unit 68 in FIG. The bidirectional remote control unit 20 includes:
It may be configured to be mountable on a so-called 19-inch rack.

Next, a monitor TV 61, a vector scope 62, a waveform monitor 6
3. An audio amplifier 64 and the like are provided, and two digital VTRs 65 and 65 corresponding to the master VTR 1 in FIG. The racks 50 and 60 are provided with power supply units 66 and 66, respectively.

A plurality of duplication VTR racks 70 are provided as needed, and a large number of VTRs for duplicating tapes are provided.
TR80 (each of the VTRs 10 ₁ , 10 ₂ ,.
.), But the plurality of racks 70, 70,...
It is installed in each. These racks 70 include
A monitor TV 71, a level meter 72, and the like are also provided as necessary.

Here, each V for tape duplication (dubbing) is used.
The TR 80 is used, for example, in combination with a tape autochanger 90 as shown in FIG. This FIG.
1, a cassette insertion hole 81, a power switch 82, an eject button 83, various operation mode switching buttons 84, and the like are provided on a front panel of the VTR 80. An automatic changer 90 for automatically inserting the video tape cassette 85 into the cassette insertion hole 81 of the VTR 80 is provided.
It is arranged and attached to the front of the VTR 80. The autochanger 90 includes an upper cassette holder 91 capable of storing, for example, up to four video tape cassettes 85,
It has a lower cassette holder 94 capable of storing up to two cassettes discharged from the TR 80. The front of the autochanger 90 has an upper empty indicator 9
2, lower full indicator 93, reset button 95,
An eject button 96, a start button 97, a tape running indicator 98, and an auto-off / error / eject indicator 99 are provided. The upper empty indicator 92 is turned on when there is no cassette tape 85 in the upper cassette holder 91,
Flashes when the orientation is not correct. The lower full indicator 93 indicates that the lower cassette holder 94 has the cassette tape 8.
The light turns off when there is no or only one cassette tape 5, turns on when the cassette tape 85 is full (two), and the VTR 80 despite the cassette tape 85 being full in the lower cassette holder 94. Flashes when is trying to eject a cassette. These indicators 92,
The blinking of 93 is performed, for example, at intervals of one second. The auto-off / error / eject indicator 99 is
Lights when the cassette tape 85 is not loaded or ejected, blinks at, for example, 0.1 second intervals when the VTR 80 is in the auto-off mode, and blinks at, for example, 1 second intervals when an error occurs in the operation of the changer. I do. By pressing the reset button 95 when the error occurs and blinking at one-second intervals, the apparatus can be reset.

It should be noted that the present invention is not limited to only the above-described embodiment. For example, the number of connected VTRs, the master V
Number and type of TRs (analog VTR, digital VTR
) Can be set arbitrarily. Further, the time-division timing of bidirectional communication and specific numerical values of the transmission / reception frequency can be arbitrarily set in addition to the above embodiment.

[0040]

According to the duplication tape producing apparatus of the present invention, a bidirectional remote control unit transmits and receives a control signal to and from a plurality of tape recorders via one bidirectional control signal line. In such a manner, a plurality of tape recorders are supplied with switching between a signal from a video and audio signal source and a test signal from a test signal supply unit, and after recording a test signal on each tape recorder, Since the recording result is inspected by reproducing, it is possible to easily confirm whether or not the normal recording has been performed only by confirming the inspection result. Therefore, one recorded tape
This eliminates the need to play and monitor books one by one and greatly improves the mass production efficiency of video software tapes.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing a schematic configuration of a duplicate tape producing apparatus according to an embodiment of the present invention.

FIG. 2 is a block circuit diagram schematically showing an internal configuration of a bidirectional remote control unit and a VTR in the embodiment.

FIG. 3 is a block circuit diagram showing a schematic configuration of a communication unit for explaining a bidirectional communication operation of the embodiment.

FIG. 4 is a diagram showing a specific example of a communication format of the embodiment.

FIG. 5 is a time chart for explaining a signal transmission / reception operation of the embodiment.

FIG. 6 is a diagram provided for explaining a recording result inspection of the embodiment.

FIG. 7 is a block circuit diagram showing a control system of a larger-scale system configuration example of the duplication tape creation device.

FIG. 8 is a block circuit diagram showing a video and audio signal system of a larger-scale system configuration example of the duplication tape making device.

FIG. 9 is a front view showing a part of the external appearance of the system of the duplication tape creation device.

FIG. 10 is a perspective view showing a specific example of a VTR used in the duplication tape making device.

[Explanation of symbols]

1 Master VTR 2 Changeover switch 3 Test signal generation circuit 4 ..Remote control unit 10 ₁ , 10 ₂ ,..., VTR (video tape recorder) 11..., Interface circuit 12,. 13: Recording result inspection circuit 14: System controller 17f: Demodulation circuit 18a: Second modulation circuit 20 ······························································ Superimpose Circuit 26: Two-way communication circuit 27a: First modulation circuit 2 c demodulation circuit 31 host CPU 32 input / output terminal device 33 operating unit 34 ····· Printer 35 ······· Monitor TV

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazuhiro Kita 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Fumio Sekiguchi 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo (56) References JP-A-63-171461 (JP, A) JP-A-1-294251 (JP, A) JP-A-4-46452 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) G11B 15/02 G11B 27/00-27/08

Claims (1)

(57) [Claims] 1. A duplicate tape producing apparatus for producing a plurality of duplicate tapes by sending a video signal and an audio signal from a video and audio signal source to a plurality of tape recording apparatuses for recording. A remote control unit connected via a bidirectional control signal line for transmitting and receiving a control signal to and from a device, a test signal supply unit for outputting a recording test signal, and a recording result of each of the tape recording devices The remote control unit sends a test signal from the test signal supply unit to the plurality of tape recording devices for recording. A duplicated tape producing apparatus, wherein the recorded portion is reproduced and inspected by the recording result inspecting means.