JPH05334853A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To diminish phase modifying errors by operating phase modification of reproducing side and recording side devices without controlling tape speed and to shorten the phase modifying time and also to quickly confirm an editing point in the information recording and reproducing device such as a digital VTR, etc. CONSTITUTION:The digital VTR having an editing function for editing in using its recording side device and reproducing side device is provided with storage parts 31 and 33 for storing video and audio signals inputted from the reproducing side device, and a readout position is controlled by video and audio storage control parts 32 and 34 in order to synchronize the video and audio signals to be read out of the storage parts 31 and 33 with a video and audio signals to be reproduced by the producing side device. By making it possible that either the video and audio signals from the reproducing side device or the video and audio signals read out of the storage parts 31 and 33 is selected and recorded 011 a tape 10 and is then reproduced, the phase modifying operation at the editing time is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus for recording / reproducing information signals such as video / audio signals.

[0002]

2. Description of the Related Art Simple editing of video and audio signals recorded on a magnetic tape is generally performed by connecting two VTRs. Taking insert editing as an example, a conventional procedure for executing editing will be described. In the insert editing, a reproduction signal at a predetermined position on the material tape set on the reproduction side VTR is inserted and recorded at a predetermined position on the material tape set on the recording side VTR. In this case, first, the tape is rewound from a predetermined position on each of the two VTRs by a certain fixed amount (this is referred to as preroll). After that, both the recording-side and reproducing-side VTRs are set to the reproducing mode at the same time so that the reproducing-side VTR is servo-locked with the reproduced video signal in synchronization with the external or internal reference signal, and the recording-side VTR is the reproducing-side VTR.
Servo control is performed so that the servo is locked in synchronization with the output video signal from. As a result, synchronization between two VTRs required for editing, that is, a phasing operation is performed.

After this phasing operation is performed, the recording side VTR
When the tape reaches the editing start point, the recording-side VTR enters the recording mode to record the signal reproduced by the reproducing-side VTR, and when the editing end point is reached, the recording-side VTR enters the reproduction mode again, The work is finished.

Two methods are generally used to control the phase adjusting operation performed during this editing operation.

In the first method, one VTR, for example, the reproducing VTR, is in a normal reproducing mode (a mode in which a tape is run at a constant speed for reproduction), and the other VTR, for example, a recording VTR is in a variable speed reproducing mode. Set the mode (a mode in which the tape is run at a speed different from the steady speed for playback) so that the difference between the time code and the edit point on the playback VTR matches the difference between the time code and the edit point on the recording VTR. The second is a method of controlling the tape speed of the VTR on the recording side.

The second method is to incorporate a reference signal generator into two VTRs so that each VTR advances the tape being recorded for the time advanced by the reference signal generator during the preroll period. This is a method of performing a phase adjusting operation by controlling the tape speed.

However, in all of these methods, since the tape speed is controlled for the phase adjusting operation, even if the phase adjusting condition is satisfied during the operation in the variable speed reproduction mode, after the constant speed is reached, When the servo lock is performed, the condition of the phase adjustment may not be satisfied, and the synchronization of the two VTRs may be shifted by one frame, and the phase adjustment takes a long time.

On the other hand, edit points (edit start point and edit point)
To determine the edit point, press the edit point setting button while operating in playback mode to determine the edit point, and then edit in jog or variable speed playback mode to check if there is any problem with the position of the edit point. The images before and after the dot are being checked. However, in jog or variable speed playback mode, the tape runs at a speed different from that during normal recording / playback, so a normal screen cannot be obtained unless the VTR is equipped with a dynamic tracking head that automatically follows the track. It is difficult to check the front and back images.

On the other hand, a video recording / reproducing apparatus such as a VTR has two
Two methods are generally used for relay reproduction in which the reproduction output of the first device is switched to the reproduction output of the second device by connecting the units and reproducing.

In the first method, when the end of the recording medium is detected during reproduction of the first device, a reproduction start command signal is output to the second device to start the reproduction operation of the second device. , A method of switching the reproduction output signal. However, in this method, since the reproduction start command signal is output to the second device after the end of the recording medium of the first device is detected, the reproduction output signal is temporarily interrupted on the way.

The second method records position information (time code) together with video and audio signals on a recording medium.
When a little before the end position of the recording medium is detected during the reproduction of the device, after outputting the reproduction start command signal to the second device,
The position information reproduced by the second device is compared with the position information being reproduced by the first device, and the first information is compared so that the results match.
This is a method of changing the reproduction speed (tape speed) of the second device by the device, and then switching the reproduction output signal after the reproduction speed of the second reproduction device becomes constant. In this method, the reproduction of the second device is started during the reproduction of the first device, and the reproduction output signal is switched when the position information reproduced by both devices coincides with each other. It is possible to continuously play back without disturbing.

However, since the reproduction speed of the second device is controlled by the first device, when the two devices are different models, the difference in the rising characteristics of the capstan motor for running the tape causes It may take time to match the position information reproduced by the device. Also,
Since the position information near the end of the recording medium in the first device and the position information at the start of the recording medium in the second device are compared, if the position information on the two recording media is not continuous, There is a problem that continuous reproduction cannot be performed after a recording medium that has been recorded only halfway, such as being inoperable or reproducing one program after the next program is reproduced.

[0013]

As described above, in the conventional editing, the phase adjustment operation of the two VTRs is performed by controlling the tape speed. Therefore, the phase adjustment condition is satisfied during the operation in the variable speed reproduction mode. Even if the above conditions are satisfied, the phase adjustment conditions are not satisfied when the servo lock is performed after the steady speed is reached, and a phase error such as the synchronization of the two VTRs shifting by one frame occurs, or the phase adjustment occurs. There was a problem that it took a long time.

Further, when checking the quality of the position of the determined edit point, since the method of checking the images before and after the edit point in the jog or variable speed reproduction mode is adopted, the VTR is not equipped with a dynamic tracking head. There was a problem that a normal screen could not be obtained and it was difficult to confirm.

A first object of the present invention is to reduce the phasing error and reduce the phasing time by performing the phasing operation of the reproducing side and recording side devices without controlling the tape speed. An object of the present invention is to provide an information recording / reproducing apparatus capable of promptly confirming points.

On the other hand, in relay reproduction, when the end of the recording medium is detected during reproduction of the first device, a reproduction start command signal is output to the second device to start the reproduction operation of the second device and reproduce output. The first method of switching signals has a problem that the reproduction output signal is temporarily interrupted during relay reproduction.

During the reproduction of the first device, a little before the end position of the recording medium is detected, a reproduction start command signal is output to the second device, and the reproduction of the recording medium reproduced by the second device is performed. The position information and the position information being reproduced by the first device are compared, and the reproduction speed of the second device is changed by the first device so that they coincide with each other, and the speed of the second reproduction device becomes constant. In the second method of switching the reproduction output signal after
When the second device is of a different model, it takes time to match the position information due to the difference in the rising characteristics of the capstan motor, and thus the reproduction positions of both devices may not be continuous.

Further, it is said that when the position information on the recording medium in the first and second devices is not continuous, it becomes inoperable, or continuous reproduction cannot be performed after the recording medium which has been recorded only halfway. There was a problem.

A second object of the present invention is to make it possible to easily make the reproduction positions of both the first device and the second device which perform relay reproduction different from each other, and to record the recorded position information. It is an object of the present invention to provide an information recording / reproducing apparatus capable of continuously reproducing even a recording medium which is not continuous.

[0020]

In order to achieve the first object, the present invention is an information recording / reproducing apparatus having an editing function for performing editing using a recording side apparatus and a reproducing side apparatus. Storage means for storing the information signal input from the storage means, and reading for controlling the read position of the storage means so that the information signal read from the storage means and the information signal reproduced by the recording side device are synchronized. Position control means, first selection means for selecting one of the information signal input from the reproduction side device and the information signal read from the storage means, and the information selected by the first selection means The basic feature is that the recording medium is provided with recording means for recording a signal on a recording medium and reproducing means for reproducing the information signal recorded by the recording means.

In addition to the above basic structure, the present invention also provides
An operation timing control means for controlling the operation timing of the recording side device according to the rising characteristic when the reproducing side device changes from the stationary state to the reproducing state, and the reproducing side device in the state controlled by the operation timing control means, When the servo lock is detected by the servo lock detecting means for detecting the servo lock in the recording side device, the difference between the time code in the reproducing side device and the edit point on the recording medium and the time in the recording side device are detected. It is characterized by further comprising a comparison means for comparing the difference between the code and the edit point on the recording medium. In this case, the read position control means determines the difference between the reproduction time code in the reproduction side device and the edit point on the recording medium, the reproduction time code in the recording side device and the recording medium according to the comparison result of the comparison means. The reading position from the storage means is controlled so that the difference from the editing point of is zero.

In addition to the above basic structure, the present invention further comprises a second selecting means for selecting either an information signal from the outside or an information signal reproduced from a recording medium as an input to the storage means, and a reproducing means. It further comprises a third selecting means for selecting one of the information signal reproduced by and the information signal read from the storage means and outputting it to the outside.

In order to achieve a second object, the present invention provides an information recording / reproducing apparatus having a relay reproducing function for performing a relay reproduction by using the first and second apparatuses having the recording / reproducing function. Position information comparing means for comparing the reference first position information generated in the second device by a command from the second device with the second position information read from the recording medium by the second device. And servo control means for servo-controlling the reproduction speed in the second device so that the first position information and the second position information match according to the comparison result of the position information comparing means,
By the servo control of the reproduction speed by the servo control means, the reproduction signal of the first device is changed to the reproduction signal of the second device in a state where the first position information and the second position information match. And a switching means for switching the output signal.

Further, according to the present invention, the relay reproduction data for recording the relay reproduction data indicating the position information of the reproduction start point and the reproduction end point on the plurality of recording media used for the relay reproduction on at least one of the plurality of recording media. Data recording means, relay reproduction data storage means for storing relay reproduction data reproduced from the recording medium recorded by the relay reproduction data recording means, and relay reproduction data stored by the relay reproduction data storage means It further comprises a control means for controlling the relay reproduction operation of the first and second devices.

[0025]

According to the present invention, when one or both of the video and the audio are edited by using the information recording / reproducing apparatus such as two VTRs, first, the reproduction signal from the reproducing apparatus is recorded. Stored in the storage means provided in
By controlling the read position so that the information signal read from the storage means and the information signal reproduced by the recording side device are synchronized, the phase-adjusting operation between the recording side device and the reproducing side device is performed.

In this case, preferably, when the tape position before the edit point is pulled up by the pull roll amount and then the phase adjusting operation is started, the reproduction side device is first set to the reproduction mode and then the recording side device is set to the reproduction mode. By doing so, the start timing of the recording side device is determined so that the distance between the servo lock of both devices and the editing point becomes longer in the recording side device by several frames. Therefore, when the recording-side device and the reproducing-side device are connected, the rising characteristic of the reproducing-side device may not be determined at first, so that the recording device may not become longer, but after that, the recording device always becomes longer.

Then, the reproduction information signal from the reproduction side device is stored in the storage part of the recording side device to detect the servo lock of the reproduction side device and the recording side device, and when the servo lock state is maintained for a certain period of time, By changing the read position of the storage means, that is, the timing at which the reproduction signal written in the storage means is read, the phasing operation is completed.

According to such a phasing operation, a phasing error does not occur as in the conventional method of performing the phasing operation by controlling the tape speed, and in a short time of the servo lock time of the normal reproduction mode. The phase adjusting operation ends.

Further, in the reproduction mode for determining the editing point, the second selection means for selecting the input of the storage means is switched to write the reproduction information signal of the recording side device itself to the storage means, and the third selection means. The information signal read from the storage means is output to the outside, and after setting the edit point, only the half of the storage capacity of the storage means is written, and the subsequent write-protection is performed, whereby the information signal before and after the edit point is set. Can be read immediately.

Further, the storage means is used for editing one frame, and the input information signal is not recorded on the recording medium one frame at a time as in the conventional case but is collectively stored in the storage section, and the capacity of the storage section becomes insufficient. Sometimes it can be transferred to a recording medium for recording.

In the modes other than the edit mode, the input information signal and the reproduction information signal are input to the storage unit to control the writing area and the reading area to the storage unit, so that the information signals of a plurality of cue points can also be used for storage. You can

On the other hand, in the present invention, when relay reproduction is performed using two information recording / reproducing devices such as VTRs, for example, after inputting the reproduction start point and the reproduction end point of all recording media used for relay reproduction. At the time when the first device comes to a predetermined time (pre-roll time) after the reproduction end point of the first recording medium after starting the relay reproduction, the synchronous reproduction command is transferred to the second device. In the second device, the search command from the first device stops at the position before the pre-roll time from the reproduction start point before the synchronous reproduction command comes, and this command causes the time code in the second device to be stopped. At the same time that the generator starts operation and generates the time code that is the reference position information, the capstan motor operates and enters the playback mode.
The time code, which is the position information recorded on the recording medium, is read. Then, the read reproduction time code is compared with the reference time code output from the time code generator, and the reproduction speed is servo-controlled so that the two coincide with each other. After both time codes match and the reproduction signal is locked, the reproduction output signal is switched to perform relay reproduction.

Further, before the reproduction start point of the first recording medium used for relay reproduction, the position information of the reproduction start point and the reproduction end point of the signal recorded on each recording medium is recorded as relay reproduction data. By reproducing the program and controlling the relay reproducing operation of each device, all the programs recorded in the plurality of recording media can be easily and continuously relay-reproduced.

[0034]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a digital VT to which the present invention is applied.
It is a block diagram which shows only the part which concerns on this invention of R.

In FIG. 1, an analog or digital video signal is input to the video input terminal 1. A video analog / digital interface (hereinafter abbreviated as video I / F) 2 selects an analog video signal and a digital video signal and performs an input process on the selected video signal. The input processing for the analog video signal includes A / D conversion. The video input selector switch 3 is used for the video I /
The switch is for selecting one of a video signal output from F2 and a video signal read from a video storage unit described later. The input video processing unit 4 performs matrix processing, addition of an outer code, and shuffling on the video signal selected by the video input changeover switch 3.

On the other hand, the audio input terminal 5 is connected to the video input terminal 1
An analog or digital audio signal associated with the video signal input to is input. Audio analog / digital interface (hereinafter, abbreviated as audio I / F) 6
Is a selection of analog audio signal and digital audio signal,
Input processing is performed on the selected audio signal. Input processing for an analog audio signal includes A / D conversion.
The voice input changeover switch 7 is a switch for selecting one of a voice signal output from the voice I / F 2 and a voice signal read from a voice storage unit described later. The input audio processing unit 8 creates an audio block for the audio signal selected by the video input changeover switch 7, and then performs matrix processing, addition of an outer code, and shuffling.

Input video processing section 4 and input audio processing section 8
The video signal and the audio signal from are input to the recording processing unit 9. The recording processing unit 9 is a circuit that performs processing for recording on a magnetic tape, mixes input video signals and audio signals, and outputs SYNC / ID (synchronization signal and I / O signal).
D) is added, an inner code is further added, and then the data is modulated by a method suitable for recording and output.

The magnetic tape 10 is wound around a rotary drum (not shown) and is driven and driven by a capstan (not shown). A video / audio recording / reproducing head 11 and an erasing head (not shown) for erasing the recorded video and audio signals are attached to the rotary drum. The time code recording / reproducing head 1 is used as a fixed head.
2 and a CTL signal (control signal) recording / reproducing head (not shown) is provided. The head input / output changeover switch 13 is a switch for changing over the input / output of the video / audio recording / reproducing head 11, and the reproduction process input changeover switch 14 is for changing the input of the reproduction processing unit 15.

The reproduction processing section 15 performs demodulation, inner code decoding, and separation of a video signal and an audio signal on the signal selected by the reproduction processing input switch 14. The video signal and the audio signal separately output from the reproduction processing unit 15 are input to the output video processing unit 16 and the output audio processing unit 17, respectively. The output video processing unit 16 performs deshuffling, outer code decoding, channel synthesis, and error correction on the input video signal. The output voice processing unit 17 performs deshuffling, outer code decoding, and error correction on the input voice signal.

The video output changeover switch 18 is a switch for selecting either a video signal output from the output video processing unit 16 or a video signal read out from a video storage unit described later. The video I / F 19 performs output processing on the video signal selected by the output selector switch 18, and outputs an analog video signal and a digital video signal to the output terminal 2
Output to 0. Since the input of the video I / F 19 is a digital signal, the output processing includes D / A conversion for obtaining an analog video signal output.

The audio I / F 21 similarly performs output processing including D / A conversion on the audio signal output from the output audio processing unit 17, and outputs an analog audio signal and a digital audio signal to the output terminal 22. To do.

On the other hand, in order to perform editing according to the present invention,
A video storage unit 31 and a video storage control unit 32 that controls the video storage unit 31;
A voice storage unit 33 and a voice storage control unit 34 that controls the voice storage unit 33 are provided. The video storage control unit 32 and the audio storage control unit 34 are controlled by the system control unit 35.
The video storage input changeover switch 36 is a switch for selecting either the video signal output from the video I / F 2 or the video signal output from the output video processing unit 16 and inputting it to the video storage unit 31.

The control panel 37 is a front panel of the VTR, and in addition to various buttons for instructing the basic operation of the VTR, for example, an editing mode setting button, an editing point setting button, an editing point changing button, and one frame editing related to editing. An execution button, a 1-frame recording button, a cue point display button, etc. are provided.

The time code processing section 38 is a circuit for recording / reproducing time code data via the time code recording / reproducing head 12, and the system control section 35 is also notified of the time code data to be recorded / reproduced. It The servo control unit 39 is a circuit that servo-controls the drum motor and the capstan motor, and the servo lock state of the servo control is monitored by the system control unit 35.

A serial control line 41 and a serial interface (hereinafter abbreviated as serial I / F) 42 are signals other than video and audio signals between a recording device and a reproducing device when editing by connecting two VTRs. The serial I / F 42 is connected to the system control unit 35.

FIG. 2 shows a portion surrounded by a dotted line in FIG.
In particular, it is a block diagram showing the internal configurations of the video storage controller 32 and the system controller 35. The video storage control unit 32 includes a write address generator 51, a read address generator 52, a write address control unit 53, and a read address control unit 54. The voice memory control unit 3
4 has the same configuration as the video storage control unit 32. The system control unit 35 includes a mode management unit 55, an operation timing control unit 56, a time code comparison unit 57, and a servo lock detection unit 58.

The video storage unit 31 and the audio storage unit 33 are
For example, a digital memory having a capacity capable of storing video signal and audio data for 10 frames is used. In the normal recording and reproduction mode, the output signal from the output video processing unit 16 becomes the input of the video storage unit 31, and V
The write memory area designation data is output to the write address control unit 51 for each frame from the mode management unit 55 that manages the TR mode.

In the write address controller 53, the write memory start address of each frame is the internal reference signal R.
The write address is set in synchronization with EF, and write addresses are sequentially generated in the write address generator 51 in synchronization with the signal clock CK. At this time, when the write inhibit signal is output from the mode management unit 55, the video storage unit 3
No new data is written in 1.

On the other hand, in the read address control section 54, the read memory area designating data is input for each frame from the mode management section 55 so that the read memory start address of each frame is predetermined from the time when the internal reference signal REF is generated. Is set after a lapse of time, and the read address is sequentially generated by the read address generator 52 from this point.

Next, the operation of the digital VTR of this embodiment will be described. First, the processing in the normal recording / reproducing mode will be briefly described.

(Normal Recording Mode) In the normal recording mode, the system control unit 35 controls the video input switch 3 between a and c, the audio input changeover switch 7 between a and c, and the head input / output changeover switch 13 a. c, between b and c of the reproduction processing input changeover switch 14, between a and c of the video output changeover switch 18, and the video storage section input changeover switch 36.
A to c are connected to each other.

The video signal input to the video input terminal 1 is
After switching analog input or digital input and input processing for each signal in the video I / F2,
Matrix processing is performed in the input video processing unit 4, and an outer code is further added to perform shuffling.

The voice signal input to the voice input terminal 5 is also
Similarly, after the analog input or digital input is switched by the audio I / F 6 and the input processing for each signal is performed, an audio signal block is created by the input audio processing unit 8, and an outer code is further added to perform shuffling. Be seen.

The video signal and the audio signal thus processed by the input video processing unit 3 and the input audio processing unit 8 are mixed by the recording processing unit 9 and SYNC / ID is added, and then an inner code is added and further modulated. To be done. The modulated signal is amplified by a recording amplifier (not shown) and then recorded on the tape 10 by the audio / video recording / reproducing head 11.

At this time, the servo control unit 39 performs servo control so that the drum motor and the capstan motor (not shown) are servo-locked in synchronization with the input video signal, and the system control unit 35 should record. The time code data is sent to the time code processing unit 38. The time code data is converted into a signal of a format to be recorded by the time code processing unit 38, and then recorded on the tape 10 by the time code recording / reproducing head 12 through a time code recording amplifier (not shown).

(Normal playback mode) In the normal playback mode, the system controller 35 controls the video input changeover switch 3 between a and c, the video output changeover switch 18 between a and c, and the head input / output changeover switch 13. bc
, A reproduction processing input changeover switch 14 a-c, and a video storage section input changeover switch 36 a-c are connected.

The signal recorded on the tape 10 is reproduced by the audio / video recording / reproducing head 11, amplified by a preamplifier (not shown), and then input to the reproduction processing section 15, where demodulation and inner code decoding are sequentially performed. Further, the video signal and the audio signal are separately output.

The video signal output from the reproduction processing unit 15 is sequentially subjected to deshuffling, outer code decoding, channel synthesis and error correction by the output video processing unit 16, and then an analog and digital video signal is supplied to the video I / F 19. Is output from the video output terminal 20 as an output video signal.

On the other hand, the audio signal output from the reproduction processing unit 15 is subjected to deshuffling, outer code decoding and error correction in the output audio processing unit 17, and an analog and digital audio signal is output from the audio I / F 21. After the processing for this is performed, it is output from the audio output terminal 22 as an output audio signal.

At this time, the servo control unit 39 causes the drum motor and the capstan motor (not shown) to operate on the tape 10
Servo control is performed so as to lock the servo in synchronism with the CTL signal recorded in (1).

FIG. 3 is a connection diagram when two digital VTRs shown in FIG. 1 are prepared and one is used as a recording device 61 and the other is used as a reproducing device 62 for editing. In this case, the recording device 61 outputs a command for controlling the operation of the reproducing device 62 from the serial I / F 42 through the serial control line 41, and the reproducing device 62 transfers its own status to the recording device 61.

Next, a specific editing operation will be described by taking two-unit editing and one-frame editing as examples.

(Two Unit Editing Mode) First, the procedure of the editing operation using two VTRs as shown in FIG. 3 will be described with reference to the flow charts of FIGS.

First, both the recording device 61 and the reproducing device 62 are set to the reproducing mode, the editing points of the recording device 61 and the reproducing device 62 are set, and then the editing operation is started. At this time, the recorder 61
Then, in the reproducing device 62, the tape 10 is rewound by a fixed amount (pre-roll amount) from each editing point and is queued up to the pre-roll position (S101).

After that, the state of each changeover switch is set by the system controller 35 in the recorder 61 (S1).
02). That is, a-c of the video input changeover switch 3
, The audio input changeover switch 7 between a and c, the head input / output changeover switch 13 between b and c, the reproduction processing input changeover switch 14 between a and c, and the video output changeover switch 18.
Between a and c, b to c of the video memory input selector switch 36
The video and audio signals recorded on the tape 11 are reproduced and the video and audio signals from the reproducing device 62 are written into the video storage unit 31 and the audio storage unit 33 by connecting the respective sections.

Next, the recording machine 61 confirms that the tape 10 of the recording machine 61 and the reproducing machine 62 is stopped at the correct pre-roll position, and then the operation timing control section 56 determines whether the number of delayed frames is positive or negative. When the number of delayed frames is a positive number (S103), a playback command is output to the playback device 62 to put the playback device 62 into playback mode (S10).
4) If the number of delayed frames is a negative number, the recorder 61 itself is set to the reproduction mode (S105). Here, the number of delayed frames is a value obtained by converting the delay time of the reproduced video signal of the reproducing device 62 with respect to the reproduced video signal from the recorder 61 into the number of frames, and its initial value is set to +5, for example. That is, the operation timing control unit 5 is set so that the number of the delayed frames is such that the reproduced video signal from the reproducing device 61 is output earlier than the reproduced video signal from the recording device 61 by, for example, 5 frames.
6 is set.

Next, after the processing of S104 or S105 is completed, after delaying by the set number of delay frames (5 frames), whichever of the recording device 61 and the reproducing device 62 is not in the reproduction mode yet. To the playback mode. That is, the operation timing control unit 56 increments the delay count by one, and when the delay count matches the delay frame number, it is checked again whether the delay frame number is positive or negative (S106 to S108). Here, when the number of delayed frames is a positive number, the recorder 61 itself is set to the playback mode (S109), and when the number of delayed frames is a negative number, a playback command is output to the player 62 to put the player 62 into the playback mode. Yes (S110).

Then, the servo lock detector 58 detects that both the recording device 61 and the reproducing device 62 are servo locked (S111). At this time, if the number of delayed frames is selected as described above, if the error in the rising characteristics of the recording device 61 and the reproducing device 62 is within ± 5 frames, the phase adjustment error between both devices 61 and 62 does not occur. become.

Next, in S111, the recorder 61 is operated as described above.
And the player 62 detects the servo lock, and, for example, 15
After confirming that the servo lock is not released continuously between frames, the recorder 61 determines the difference X between the time code of the player 62 input from the serial control line and the editing start point of the player 62, and the recorder. The difference Y between the time code read from the head 12 of 61 and the editing start point of the recorder 61
Is calculated (S112), these X and Y are compared by the time code comparison unit 57, and the difference Y−X between them is calculated (S11).
3).

Next, for Y-X, Y-X <0, Y-X
It is sequentially checked whether the conditions of> 10, 5 <Y-X are satisfied (S113, S115, S117). Where VT
When the recording device 61 has a better R rising characteristic than the reproducing device 62 and Y−X <0, the phase adjusting operation using the memory cannot be performed, and therefore, in S114, the [original delay frame number + X− [Y + 5] is set as a new delay frame number, the process returns to S101, and the phasing operation is performed again. On the contrary, when the rising characteristic of the reproducing device 62 is better than that of the recording device 61 and Y-X> 10, the original delay frame number- (Y-X + 5) is set to a new delay frame in S116. It is set as a number, the process returns to S101, and the phase adjusting operation is performed again.

Further, when 0 <Y-X <10,
When 5 <Y−X, [original delay frame number− (Y−X)] is set as a new delay frame number in S118, and when Y−X <5, [original delay frame number + Y−X] is set in S119. ] As a new delay frame number, and then the process proceeds to S120. In S120, the system control unit 35 outputs the read memory area designation data to the video storage control unit 32 and the audio storage control unit 34 so that Y−X = 0, and the reproducing unit 62 to the recording unit 61.
The video and audio signals input to the recording device 61 are synchronized with the video and audio signals read from the video storage unit 31 and the audio storage unit 33 by the recorder 61. This completes the phasing operation.

When the phase adjusting operation is completed in this way, the actual editing operation is started, and the recorder 61 keeps the reproduction mode until the tape 10 reaches the editing start point. The recording mode is set by changing the setting of (S121 to S122). That is, in the recording mode, the system control unit 35 controls the video input changeover switch 3 between b and c, the audio input changeover switch 7 between b and c, and the head input / output changeover switch 13 a.
The video and audio signals read from the video storage unit 31 and the audio storage unit 33 are recorded on the tape 11 by connecting -c and bc of the reproduction processing input changeover switch 14, respectively.

After that, when the recording device 61 reaches the editing end point, it enters the reproduction mode again and ends the insert editing operation by the two-unit editing (S123 to S124).

(One-frame editing mode) Next, the procedure of one-frame editing will be described with reference to the flow charts of FIGS. When editing one frame, the edit start point is set by setting the one-frame edit mode by the control panel 37 (S201), and then the system control unit 35 clears the storage frame counter, and then the changeover switch is imaged. The state of writing the input video signal in the storage unit 31 is set (S202). That is, between a and c of the video input changeover switch 3, between a and c of the audio input changeover switch 7, between a and c of the head input / output changeover switch 13, between b and c of the reproduction processing input changeover switch 14, and video output. The a-c of the changeover switch 18 and the b-c of the video storage input change-over switch 36 are connected.

Next, when the 1-frame recording button on the control panel 37 is pressed each time a video signal to be recorded is input (S204), the system control unit 35 increments the content of the storage frame counter by 1 (S20).
5) The input video signal is stored in the video storage unit 31 by outputting the writing memory area designation data to the video storage control unit 32 (S206). At this time, if the value of the storage frame counter is 1, the write memory area designation data is set so that the write memory address is at the head.

Next, in S203, the control panel 26
1 frame edit execution button is pressed, or S
When the value of the storage frame counter is determined to be 10 or more in 207, the system control unit 35 switches the video input changeover switch 3 between b and c so that the output from the video storage unit 31 can be recorded (S208). .. After that, the playback operation is started in the edit mode after cueing up to the position before the edit start point by the preroll amount, that is, the preroll position (S209 to 210).

Next, in S211, the servo lock detector 58 is detected.
After confirming the servo lock status with, click [Edit start point-
[10 frames] position, the read memory area designation data is output to the video storage control unit 32 to synchronize the reproduced video signal from the recorder 61 and the video signal read from the video storage unit 31. After that, when the tape 10 reaches the editing start point, the recording mode is set and the video signal read from the video storage unit 31 is recorded (S211 to S213). Then, after recording on the tape 10 by the number of storage frame counters of the video storage unit 31, the mode is returned to the reproduction mode (S214 to S214).
215). After that, a series of these operations is repeated.

Next, the procedure for setting the edit point and the video search, which are the functions associated with the present embodiment, will be sequentially described.

(Edit Point Setting Mode) When the edit point is set in the above-mentioned editing process, the control panel 37 is usually provided when the desired image is displayed on the playback screen with the VTR in the playback mode. Press the edit point setting button. At this time, since the set edit point may deviate from the desired position by several frames, the vicinity of the set edit point may be confirmed in a jog mode or the like.
In order to facilitate this confirmation, the following is performed in this embodiment.

In the normal reproduction mode, the video storage unit 31 circulates the memory for 10 frames and always stores the latest video signal. On the other hand, when the edit point setting button is pressed, the system control unit 25 instructs the video storage control unit 32 to write new write memory area designation data only for 5 frame intervals so that the vicinity of the edit point can be confirmed. Is not output, and writing is prohibited after that. In this case, immediately after setting the edit point, when the edit point change button (for example, the operation of changing the edit point by ± 1 frame is referred to as edit point change) button on the control panel 37 is pressed, the system control unit 35 reads the image storage control unit 32. Outputs memory area designating data, and outputs video output switch 1
8 is switched between bc. As a result, the video signals of ± 5 frames near the edit point stored in the video storage control unit 31 are sequentially read and output to the video output terminal 20 via the video output changeover switch 18 and the video I / F 19. The video of ± 5 frames near the edit point can be viewed immediately after setting the edit point.

(Search mode) In the modes other than editing, for example, in the recording mode and the reproduction mode, the latest continuous 10-frame video signal is normally stored in the video storage unit 31. However, if the write memory area designation data and the read memory area designation data are set in the video storage control unit 32, separate video signals can be stored for each frame.
This allows the video signals of a plurality of cue points to be stored, and by pressing the cue point display button on the control panel 37, it becomes possible to sequentially search and display the video of a plurality of cue points.

Although the video and audio signals are simultaneously edited in the above embodiments, for example, only the video signal or the audio signal may be edited using the storage section. Further, the configuration for controlling the read position of the storage unit so that the information signal read from the storage unit and the information signal reproduced by the recording side device in the edit mode are synchronized is not limited to the above embodiment, and various configurations are possible. It can be modified and implemented. In addition, the present invention can be variously modified and implemented.

Next, an example of an information recording / reproducing apparatus having a relay reproducing function will be described. FIG. 8 is a block diagram showing only a portion related to the present invention of a digital VTR having a relay reproducing function to which the present invention is applied.

In FIG. 8, an analog or digital video signal is input to the video input terminal 1. A video analog / digital interface (hereinafter abbreviated as video I / F) 2 selects an analog video signal and a digital video signal and performs an input process on the selected video signal. The input processing for the analog video signal includes A / D conversion. The input video processing unit 4 performs matrix processing, addition of an outer code, and shuffling on the video signal output from the video I / F 2.

On the other hand, the video input terminal 1 is connected to the audio input terminal 5.
An analog or digital audio signal associated with the video signal input to is input. Audio analog / digital interface (hereinafter, abbreviated as audio I / F) 6
Is a selection of analog audio signal and digital audio signal,
Input processing is performed on the selected audio signal. Input processing for an analog audio signal includes A / D conversion.
The input voice processing unit 8 creates a voice block for the voice signal input from the voice I / F 6, and then performs matrix processing, addition of an outer code, and shuffling.

Input video processing unit 4 and input audio processing unit 8
The video signal and the audio signal from are input to the recording processing unit 9. The recording processing unit 9 is a circuit that performs processing for recording on the magnetic tape 10, mixes an input video signal and audio signal, adds SYC / ID (synchronization signal and ID), and further adds an internal code. After adding, the signal is modulated by a method suitable for recording and output.

The magnetic tape 10 is wound around a rotary drum (not shown) and is driven and driven by a capstan (not shown). A video / audio recording / reproducing head 11 and an erasing head (not shown) for erasing the recorded video and audio signals are attached to the rotary drum. Further, a time code recording / reproducing head 12 and a CTL signal (control signal) recording / reproducing head (not shown) are provided as fixed heads.

The reproduction processing section 15 performs demodulation, inner code decoding, and separation of a video signal and an audio signal on the signal selected by the reproduction processing input changeover switch 14. The video signal and the audio signal separately output from the reproduction processing unit 15 are input to the output video processing unit 16 and the output audio processing unit 17, respectively. The output video processing unit 16 performs deshuffling and outer code decoding on the input video signal,
Performs channel synthesis and error correction. The output voice processing unit 17 performs deshuffling, outer code decoding, and error correction on the input voice signal.

The video I / F 19 performs output processing on the video signal output from the output video processing section 16 and outputs an analog video signal and a digital video signal to the output terminal 20. Since this video I / F 19 has a digital signal as an input, the output processing includes D / A conversion for obtaining an analog video signal. The audio I / F 21 similarly performs the D operation on the audio signal output from the output audio processing unit 17.
Output processing including A / A conversion is performed and an analog audio signal and a digital audio signal are output to the output terminal 19.

On the other hand, in order to perform the relay reproduction according to the present invention, a relay reproduction data storage section 44, a system control section 45 for controlling the same, and a time code processing section 38 are provided. The relay reproduction data is data indicating the position information of the reproduction start point and the reproduction end point during the relay reproduction on the magnetic tape used for the relay reproduction, which is input from the control panel 37 and arranged by the system control unit 45. , Is stored in the relay reproduction data storage unit 44. At the time of recording and reproducing this relay reproduction data, the time code processing unit 3
Processing is performed in 8 and recorded on the magnetic tape 11. The time code processing unit 38 also compares the reference time code at the time of relay reproduction with the reproduction time code, and the comparison result is sent to the system control unit 23.

The control panel 37 is a front panel of the VTR, and in addition to various buttons for instructing the basic operation of the VTR, a relay reproduction data recording button, a relay reproduction data reproducing button, a relay reproduction start point and end point setting button. , A relay reproduction execution button and a display section.

The servo control unit 39 is a circuit for servo-controlling the drum motor and the capstan motor, and the system control unit 45 monitors the servo lock state of the servo control. Head input / output changeover switch 13
In the recording mode, the reproduction processing input selector switch 14 is a-b, and the switch 14 is b-.
In the reproduction mode, the switch 13 is a-c and the switch 14 is a.
Switched to -c.

The serial control line 41 is VT
It is provided for exchanging signals other than video and audio signals between the master device (first device) and the slave device (second device) when performing relay reproduction by connecting two Rs, It is connected to the system control unit 45. The external reference signal input through the reference signal input terminal 43 is sent to the system control unit 45, the servo control unit 39, the time code processing unit 38, etc., and these are processed in synchronization with the reference signal. It has become so.

FIG. 9 is a detailed block diagram of a portion surrounded by a dotted line in FIG. The time code processing unit 38
The system control unit 45 includes a time code changeover switch 71, a time code generation unit 72, a time code reading unit 73, and a time code comparison unit 74. The system control unit 45 includes a serial I / F 75, an output signal switching unit 76, a time management unit 77, and operation management. It is composed of a section 78.

First, the procedure for recording the relay reproduction data of the program to be relay-reproduced on the head portion of the magnetic tape to be continuously reproduced will be described. From the control panel 37, relay reproduction data indicating position information of reproduction start point and end point of each magnetic tape 10 is input.
These relay reproduction data are sorted by the serial I / F 75 in the system control unit 45, then sent to the time management unit 77, rearranged in the reproduction order according to the relay reproduction order setting, and then relayed. It is stored in the reproduction data storage unit 44.

In the recording operation of the relay reproduction data, in order to perform the insert edit of only the time code data, the time code changeover switch 71 is connected between a and c, and the next value of the read time code data is set to the time. A mode signal (slave mode signal) output from the code generator 72 is sent from the system controller 45 to the time code generator 72. When the recording start point is reached, a and b of the time code changeover switch 71 are connected to each other, and the relay reproduction data, which is the position information of the reproduction start point and the end point of the relay reproduction, is transferred to the time code generation section 72 as the user area data. Output and time code recording / playback head 1
Record through 2.

In the reproducing operation of the relay reproduction data, after connecting the ac of the time code changeover switch 71, the reproduced time code data is separated into the time code and the user bit data by the time code reading section 73. , Is sent to the time management unit 77, where the user bit data is recognized as relay reproduction data, and after reading the final data, the data is sent to the relay reproduction data storage unit 44 and the data is stored. ..

In the relay reproducing operation, when the first device 81 shown in FIG. 10 is reproducing and the second device 82 is subsequently reproduced, the time code data is transmitted through the time code recording / reproducing head 12 to the time code reading section 73. The time code and the user bit are separated and sent to the time management unit 77. When approaching the reproduction end point, the time management unit 77 issues a search command, a standby command, and a synchronous reproduction command as described in FIGS.
/ F75 and sequentially output to the second device 82.

In the second device 82, the serial I / F 75
A command is sent to the operation management unit 78 through the, and a tape drive signal is sent to the servo control unit 39. When the synchronous reproduction command is input to the operation management unit 78, a capstan drive command is sent to the servo control unit 39, and the time code generation unit 72 is set in the preset mode in which the value of [reproduction start point-preroll time] is used as initial data. Send the time code generation command of.

Next, when the reproduction operation of the video and audio signals is started, the time code data output from the time code generating section 72 and the time code data read by the time code reading section 73 are compared with each other by the time code comparing section 7
No. 4, and the comparison result is sent to the operation management unit 78, and a capstan speed command is sent to the servo control unit 39 so that the difference between both time code data becomes zero. Then, when the difference between both time code data becomes zero, a normal reproduction signal is sent, and when the capstan locks to the reference signal,
The servo lock status is passed from the servo control section 39 to the operation management section 78. Then, at the reproduction end point, a reproduction output signal switching command is sent to the output signal switching unit 76, and the output video signal and the output audio signal are switched in synchronization with the reference signal.

When the second device 82 is reproducing and then the first device 81 is reproduced, the time code data of the second device 82 read from the serial control line 41 is changed to the serial I / O. It is sent to the time management unit 77 through F75. When the second device 82 approaches the reproduction end point, the time management unit 77 sends a search operation signal or a standby operation signal to the operation management unit 78, and similarly executes the relay reproduction.

FIG. 10 is a connection diagram when relay reproduction is performed by two VTRs. In this example, the first device 81
Outputs a command for controlling the operation of the second device 82 through the serial control line, and transfers the status of the second device 82 to the first device 81. An external reference signal is input to each of the first and second devices 81 and 82 so that the reproduction signal can be synchronized. When there is no external reference signal, the reference signal output of either device may be used as the input of the reference signal of the other device. The video output signal and the audio output signal of the second device 82 are transferred to the first device 81.
Output video signals switched by the first device 81 are output to the video monitor 84, and output audio signals are output to the speaker 85 through the audio amplifier 83.
Is output to.

FIG. 11 is a schematic flowchart for recording the relay reproduction data when executing the relay reproduction operation. At this time, it is assumed that the magnetic tape continuously reproduced is already edited and recorded together with the time code. First, from the control panel 37, input the reproduction start point and the reproduction order of the relay reproduction for the number of magnetic tapes to be continuously reproduced (S301 to S302).
The first magnetic tape used for continuous reproduction is mounted on the device 81 (S303). When the relay reproduction data recording button is pressed (S304), a search is made at a position of [reproduction start point-preroll time (5 seconds) * 2] (S305), and the time code generation unit 72 is followed by a time code that follows the reproduced time code. Is set to the generation mode (slave mode) and the reproduction mode is started (S306).

The reproduced time code is [reproduction start point-
5 seconds], only the time code is recorded by insert editing so that the reproduction start point and the end point are written into the user area of the time code in the relay reproduction order by 5 frames (S307 to S308). After writing all the relay reproduction data, a search is made at the position of [reproduction start point-5 seconds] to bring it to a stopped state (S309).

12 to 13 are schematic flow charts of the relay reproducing operation using the two VTRs connected as shown in FIG. First, the relay reproduction data read button on the control panel 37 is pressed to read the data of the program to be continuously reproduced, and after the reading is completed, a search is made at a position 5 seconds (preroll time) before the reproduction start point and the operation is stopped (S420). ). At this time, if the recording medium on which the continuous reproduction data is not recorded or the procedure of the continuous reproduction program is desired to be changed, the program data to be relay reproduced is input from the control panel 37 (S42).
1 to S423). When the relay reproduction data is input, there is no need to execute the relay reproduction data reading operation again.

When the relay reproduction start button is pressed, reproduction of the first device 81 is started (S402), and it is checked whether or not there is a program to be reproduced next (S403). If there is no program, the end point of the program being reproduced is determined. Check 2 seconds later than 2
The device is stopped at the time when seconds have passed (S412 to S41).
3). If there is the next program, the following processing is executed when the program being reproduced is near the end point.

At 5 minutes ago, it is detected whether or not the magnetic tape of the second device 82 is searched at a position 5 seconds before the start point of the program, and if not searched, the second device 82 is searched. The search command is output to 82 (S404 to S4).
05). When 15 seconds have passed, an instruction to put the second device 82 in the standby state is output (S406 to S40).
7). When it reaches the point 5 seconds before the end point of the reproduction, the synchronous reproduction command is output to the second device 82 (S408 to S40).
9). Upon receiving this command, the second device 82 sets the time code generator to the preset mode, sets the preset data to the value of [playback start point-5 seconds], and rotates the capstan motor at a speed slightly faster than the playback speed. start.
When the reproduction is started, the time code data is read out, and this is compared with the data output from the time code generating section 72, the reproduction speed is controlled so that they are the same, and the reproduction is performed when they become the same. Servo lock with constant speed. At this time, if the values of the time code data do not match even after a certain period of time or more, the reproduction speed is forcibly made constant, and the reproduction speed is servo-locked within the pre-roll time. However, make sure that the images in continuous playback are not disturbed.

When the reproduction end point is reached, V.S. is synchronized with an external reference signal. A command for switching the output video signal and the output audio signal in the SYNC section is output to the output signal switching unit 28 (S410 to S411), and the first device 81 is stopped 2 seconds after the reproduction end point (S412 to S413).

Even when three or more magnetic tapes are continuously reproduced, the signal to be output is output to the second device 82,
By changing whether to output to the servo control unit 39 (S415 to S418), continuous reproduction can be performed by a similar method.

FIG. 14 is a display example on the control panel 37 of the first device 81 in the relay reproduction. This display example shows that the first device 81 has finished playing and the second device 82 is playing, and the playback time codes 90, 9 of the first and second devices 81, 82 are shown at the top.
2 and the operating states 91 and 93 of the respective devices 81 and 82 are displayed. The relay reproduction data 94 is displayed on the left side in the order of continuous reproduction, and the relay reproduction state display section 95 is on the right side. The relay reproduction state display portion 95 graphically displays up to what portion is currently reproduced, and the portion where reproduction has ended is painted out so that the progress status can be seen at a glance.

[0111]

As described above, according to the present invention, the VT
When two recording / reproducing devices such as R are prepared, and one is used as a recording side device and the other is used as a reproducing side device, a reproduction information signal of the reproducing side device is written in a storage part of the recording side device, By changing the read position of the storage unit to perform the phasing operation so that the information signal read from the device and the information signal reproduced by the recording side device are synchronized, the phasing error is reduced and the phasing time is shortened. can do.

Further, by selecting and switching the input to the storage section according to the operation mode and changing the write address and the read address to the storage section, it is possible to easily confirm and change the video frames before and after the editing point. ..

Further, in the 1-frame edit mode, the input information signal is written in the storage unit until the storage capacity is full, and the input information signal is recorded on the recording medium when the storage capacity is full, whereby the editing time can be shortened. Become.

In the normal reproduction mode and recording mode, by storing a plurality of cue point information signals in the storage section, it is possible to perform a search while confirming the information content.

On the other hand, according to the present invention, when the relay reproduction is performed by using the two recording / reproducing devices, the first device stands by near the end point of the program recorded on the recording medium being reproduced. A command such as sending a synchronous reproduction signal is given to the second device, and the second device compares the reference position information internally generated with the position information reproduced from the recording medium, and the difference becomes zero. By performing playback speed control such as servo control of the capstan and switching the playback output signal at the end point of the program, relay playback can be performed while maintaining the continuity of the output signal for programs with different position information. ..

Further, relay reproduction data is recorded on a recording medium which is first reproduced at the time of relay reproduction, and the relay reproduction is easily performed by automatically reading and controlling the relay reproduction before the relay reproduction. You can

[Brief description of drawings]

FIG. 1 is a block diagram of a video recording / reproducing apparatus having an editing function according to an embodiment of the present invention.

FIG. 2 is a block diagram of a video storage control unit and a system control unit in FIG.

FIG. 3 is a connection diagram when two devices are edited using the apparatus of the embodiment.

FIG. 4 is a diagram showing a part of a flowchart for explaining a procedure for editing two units.

FIG. 5 is a diagram showing another part of the flowchart for explaining the procedure for editing two units.

FIG. 6 is a diagram showing a part of a flowchart for explaining a procedure of 1-frame editing using the apparatus of the embodiment.

FIG. 7 is a diagram showing another part of the flowchart for explaining the procedure of 1-frame editing using the apparatus of the embodiment.

FIG. 8 is a block diagram of a video recording / playback apparatus having a relay playback function according to another embodiment of the present invention.

9 is a block diagram of a system control unit and a time code processing unit in FIG.

FIG. 10 is a connection diagram when performing relay regeneration using two devices of the same embodiment.

FIG. 11 is a flowchart of VTR control when recording relay reproduction data.

FIG. 12 is a diagram showing a part of a flowchart of VTR control during relay reproduction.

FIG. 13 is a diagram showing another part of the flowchart of VTR control during relay reproduction.

FIG. 14 is a diagram showing a display example of a display unit of a master VTR in relay reproduction.

[Explanation of symbols]

1 ... Video input terminal 3 ... Video input selector switch 5 ... Audio input terminal 7 ... Audio input selector switch 10 ... Magnetic tape 11 ... Video / audio recording / reproducing head 12 ... Time code recording / reproducing head 13 ... Head input / output selector switch 14 Playback processing input selector switch 18 Video output selector switch 20 Video output terminal 22 Audio output terminal 31 Video storage unit 32 Video storage control unit 33 Audio storage unit 34 Audio storage control unit 35 System control unit 36 ... Video storage input changeover switch 37 ... Control panel 38 ... Time code processing unit 39 ... Servo control unit 41 ... Serial control line 51 ... Write address generator 52 ... Read address generator 52 ... Write address control unit 54 ... Read address control unit 55 ... Mode management section 6 ... Operation timing control section 57 ... Time code comparison section 58 ... Servo lock detection section 61 ... Recording machine 62 ... Reproduction machine 44 ... Relay reproduction data storage section 45 ... System control section 71 ... Time code changeover switch 72 ... Time code generation section 73 ... Time code reading unit 74 ... Time code comparing unit 75 ... Serial I / F 76 ... Output signal switching unit 77 ... Time management unit 78 ... Operation management unit 81 ... First device (master device) 82 ... Second device (Slave unit) 83 ... Audio amplifier 84 ... Video monitor 84 ... Speaker 90 ... Time code display section 91 ... Status display section 92 ... Time code display section 93 ... Status display section 94 ... Relay playback data display section 95 ... Relay playback status display Department

Claims (5)

[Claims] 1. An information recording / reproducing apparatus having an editing function for performing editing using a recording side apparatus and a reproducing side apparatus, for storing an information signal input from the reproducing side apparatus to the recording side apparatus. Storage means, read position control means for controlling a read position from the storage means so that an information signal read from the storage means and an information signal reproduced by the recording side apparatus are synchronized; First selection means for selecting either the input information signal or the information signal read from the storage means, and recording means for recording the information signal selected by the first selection means on a recording medium. An information recording / reproducing apparatus comprising: a reproducing unit that reproduces the information signal recorded by the recording unit. 2. An information recording / reproducing apparatus having an editing function for performing editing using a recording side apparatus and a reproducing side apparatus, for storing an information signal input from the reproducing side apparatus to the recording side apparatus. Storage means, operation timing control means for controlling operation timing of the recording side apparatus according to rising characteristics when the reproduction side apparatus is changed from a stationary state to a reproduction state, and a state controlled by the operation timing control means In the reproducing side device and the recording side device, and a servo lock detecting means for detecting a servo lock in the reproducing side device, and when a servo lock is detected by the servo lock detecting means, a reproducing time code in the reproducing side device and a recording medium on the recording medium. Comparing means for comparing the difference between the edit point and the difference between the reproduction time code in the recording side device and the edit point on the recording medium; The difference between the reproduction time code in the reproduction side device and the edit point on the recording medium and the difference between the reproduction time code in the recording side device and the edit point on the recording medium are zero according to the comparison result of the comparison means. And a read position control means for controlling the read position from the storage means, and a first position selecting either the information signal input from the reproduction side device or the information signal read from the storage means. It is characterized by further comprising: selecting means, recording means for recording the information signal selected by the first selecting means on a recording medium, and reproducing means for reproducing the information signal recorded by the recording means. Information recording / reproducing apparatus. 3. A second selection means for selecting either an information signal from the outside or an information signal reproduced from a recording medium as an input to said storage means, an information signal reproduced by said reproduction means and said storage. 3. The information recording / reproducing apparatus according to claim 1, further comprising third selecting means for selecting any one of the information signals read from the means and outputting it to the outside. 4. An information recording / reproducing apparatus having a relay reproducing function for performing a relay reproduction by using first and second apparatuses having a recording / reproducing function, wherein the second device is provided with a command from the first apparatus. Position information comparing means for comparing the first position information, which is a reference generated in the apparatus, with the second position information read from the recording medium by the second apparatus, and the comparison result of the position information comparing means. According to the servo control means for servo-controlling the reproduction speed in the second device so that the first position information and the second position information match with each other, and the servo control of the reproduction speed by the servo control means. Switching means for switching the output signal from the reproduction signal of the first device to the reproduction signal of the second device in a state where the first position information and the second position information match. Information recording and reproducing apparatus characterized by comprising a. 5. Relay reproduction data recording means for recording relay reproduction data indicating position information of a reproduction start point and a reproduction end point on a plurality of recording media used for relay reproduction on at least one of the plurality of recording media. A relay reproduction data storage means for storing the relay reproduction data reproduced from the recording medium recorded by the relay reproduction data recording means; and the relay reproduction data stored by the relay reproduction data storage means The information recording / reproducing apparatus according to claim 4, further comprising: a control unit that controls a relay reproducing operation of the second apparatus.