JPH06168579A - Video tape recorder provided with random reproducing function - Google Patents

Abstract

PURPOSE:To enable a random reproduction with simple operation by recording index information in a tape head, reading reproducing start and end positions based on an indicated index number and reproducing a video. CONSTITUTION:The index number and plural sets of index information of the reproducing start and the reproducing end positions corresponding to respective index numbers are recorded on the tape head under the control of a recording/ reproducing means M2 by an index recording means M3. The tape is rewound to the head under the control of the means M2 by a rewind control means M4, and the index information is reproduced to be stored under the control of the means M2 by a storage control means M5. The reproducing start and end positions are read from the means M5 based on the indicated index number by a random reproducing means M6, and the means M2 is controlled based on a tape running position detected from a tape running position detection means M1, and the image is reproduced between the interval from the reproducing start position to the reproducing end position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape recorder with a random reproduction function for randomly reproducing an image from a recorded tape on which an image is recorded.

[0002]

2. Description of the Related Art Conventionally, as described in Japanese Unexamined Patent Publication No. 50-83005, a video is recorded between video information so that an arbitrary video can be randomly reproduced from a tape on which the video is recorded. When a tape is played back, a portion which is not recorded and a portion which is not recorded are counted. It is known that the count value at the current position is compared with the number from the beginning of the video to be obtained, and when they match, the video is played back to enable random playback.

Further, as disclosed in Japanese Patent Application Laid-Open No. 56-94560, when it is desired to see the middle of a recorded tape, a blank portion in which the recording is erased is provided in that portion, and the pulse of the cueing station number is provided in this blank portion. It is also known that a signal is recorded, the signal is read, the current position is recognized, and the tape is rotated in a direction close to the desired cueing position for quick cueing.

[0004]

However, in such a conventional one, since the tape has a blank portion,
When the tape is continuously reproduced, the video is interrupted, and there is a trouble that it is necessary to re-edit such as dubbing in order to provide a blank portion. Also,
It is necessary to specify the beginning part of the video to be played back at any time. For example, if multiple videos are recorded on one tape and this video is played back at random, the playback of one video ends. Then, when cueing to the next video, operate the playback end key to stop the playback once, then specify the cueing station number of the next video, and restart the playback of the next video. In addition, there is a problem that the operation of randomly reproducing is troublesome.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a video tape recorder with a random reproduction function which enables random reproduction by a simple operation with the object of solving the above problems.

[0006]

In order to achieve such an object, the present invention has the following constitution as means for solving the problem. That is, as illustrated in FIG. 1, a tape running position detecting means M1 for detecting the running position of the tape, and a recording / playback means M2 for running the tape and recording or reproducing information recorded on the tape. And a recording / reproducing means M in the video tape recorder including
2 to control index recording means M3 for recording index information of a plurality of index numbers and a plurality of sets of reproduction start positions and reproduction end positions corresponding to the respective index numbers at the beginning of the tape; Record
At least the index information at the beginning of the tape is reproduced by controlling the reproducing means M2 to rewind the tape to the beginning of the tape and the rewinding control means M4 and the recording / reproducing means M2 after the rewinding is completed. Based on the storage control means M5 to be stored and the instructed index number, the reproduction start position and the reproduction end position are read from the storage control means M5, and the tape running position detected by the tape running position detecting means M1. Random playback means M6 for controlling the recording / playback means M2 to play the video between the playback start position and the playback end position based on the above. That is the structure of the video tape recorder.

[0007]

In the video tape recorder with a random reproduction function having the above-mentioned structure, the index recording means M3 is used for recording / recording.
By controlling the reproducing means M2, index information of the index number and a plurality of sets of reproduction start position and reproduction end position corresponding to each index number is recorded at the head of the tape.

The rewinding control means M4 controls the recording / reproducing means M2 at the time of reproduction to rewind to the beginning of the tape,
The storage control means M5 is provided with a recording / reproducing means M after completion of rewinding.
2 is controlled to reproduce at least the index information at the head of the tape and store the index information.

Then, the random reproduction means M6 reads the reproduction start position and the reproduction end position from the storage control means M5 on the basis of the instructed index number, and sets it to the tape running position detected by the tape running position detecting means M1. Based on this, the recording / reproducing means M2 is controlled to reproduce the image from the reproduction start position to the reproduction end position.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 is a block diagram showing a schematic configuration of a video tape recorder with a random reproduction function which is an embodiment of the present invention. Reference numeral 1 is a tape, 2 is a rotating video / hi-fi audio head, and 4 is an audio / control head.

The video / hi-fi audio head 2 is connected to the video circuit 6, and reproduces and outputs the video signal recorded on the video / hi-fi audio track 1a of the tape 1 (see FIG. 3 (a)) to output the audio. The control head 4 is connected to the audio circuit 8 and reproduces the audio signal recorded on the control track 1b (see FIG. 3A) and the normal signal track 1c (see FIG. 3A) of the tape 1. And output.

The voice / control head 4 is connected to a recording / reproducing control circuit 10. The recording / reproducing control circuit 10 has a well-known CPU 12, a ROM 14 for storing a control program and data in advance, and a readable / writable one. RA
An input / output circuit, here, a tape running position detection circuit 18, a drive control circuit 20, and a communication circuit 22 are connected to each other via a common bus 24, and are configured as a logical operation circuit centering on M16. Is configured to do.

Then, the CPU 12 controls the control track 1b detected by the voice / control head 4.
The signal recorded in 1 is input via the tape running position detection circuit 18, and the signal from a random reproduction control device 26 described later is input via the communication circuit 22.

In this embodiment, as shown in FIG. 3B, an absolute address indicating the running position of the tape 1 is recorded on the control track 1b of the tape 1, and this absolute address is shown in FIG. As described above, first, while recording each video A, B, C ... On the tape 1, audio is recorded on the control track 1b in correspondence with the reproduction start position As and the reproduction end position Ae of each video A, B, C. It is written by the control head 4. The absolute address is at least each video A,
It suffices that they are recorded in correspondence with the reproduction start position As and the reproduction end position Ae of B, C ..., and need not be recorded in other locations. Further, the absolute address may be a continuous number, or may be a number corresponding to non-consecutive dates, or the like, as long as it is not a duplicate number.

The absolute address indicating this traveling position is not limited to the one recorded on the control track 1b,
The time code recorded on the video / hi-fi audio track 1a by the video / hi-fi audio head 2 at the time of recording may be used as an absolute address indicating the running position of the tape 1. At that time, as shown by the broken line in FIG.
A signal from the hi-fi voice head 2 may be input to the tape running position detection circuit 18 to read the absolute address.

Further, not only the absolute address as described above,
In order to detect the running position of the tape 1, a pulse signal of one pulse per one rotation of the video / hi-fi audio head 2 is recorded on the control track 1b of the tape 1 at the time of recording, and the tape running position detection circuit 18 outputs this pulse signal. May be used to output the count value as the running position of the tape 1. Further, the present invention is not limited to this, and it is also possible to detect the rotation of a reel stand (not shown) and output the count value as the running position of the tape 1, as long as the running position of the tape 1 can be detected.

Based on these signals, programs and data in the ROM 14 and RAM 16, the CPU 12 outputs a control signal to a drive motor (not shown) of the tape 1 via the drive control circuit 20 for recording on the tape 1. , Playback, fast forward, rewind, etc. are controlled.
In this embodiment, the video / hi-fi audio head 2, the audio / control head 4, the video circuit 6, the audio circuit 8,
The recording / playback control circuit 10 forms a video main body 25.

The video circuit 6, the audio circuit 8, the communication circuit 2
Reference numeral 2 is connected to a random reproduction control device 26. The random reproduction control device 26 is configured as a logical operation circuit centering on a well-known CPU 28, a ROM 30 for storing a control program and data in advance, and a readable / writable RAM 32. , Input / output circuit, here communication circuit 34, voice signal conversion circuit 36, character generator 38, input circuit 4
0s are connected to each other via a common bus 42 and are configured to perform input / output with the outside.

Then, the CPU 28 inputs the absolute address indicating the running position of the tape 1 detected by the tape running position detecting circuit 18 via the communication circuit 34, and also inputs the input device 4.
4 is input via the input circuit 40, and based on these signals and the programs and data in the ROM 30 and RAM 32, the CPU 28 causes the audio signal conversion circuit 3
A signal is output to the audio circuit 8 via 6 and a display device 46 (hereinafter referred to as TV monitor 46) via the audio signal conversion circuit 36 and the character generator 38.
Is configured to output a signal to.

On the other hand, in the video circuit and the audio circuit 8,
The video output device 48 is connected to the video output device 48.
The video / audio information output from the video / hi-fi audio head 2 and the audio / control head 4 can be recorded on the tape 1. As the video output device 48,
It may be another video tape recorder, a video camera, or a computer game machine.

Next, the operation of the video tape recorder with the random reproduction function of this embodiment described above will be described with reference to the flow charts shown in FIGS. Video information output from the video output device 48 is previously recorded on the tape 1. The video information may be one long time or a plurality of completely different video information. Then, in this embodiment, the tape 1 has a reproduction start position As and a reproduction end position Ae, respectively, as shown in FIGS. 3, 9 and 10, corresponding to the respective images A, B, C. Absolute address is recorded.

A recorded tape 1 on which this image is recorded
FIG. 4 shows the writing process for recording index information in the
Explained by. This writing process is executed in the random reproduction control device 26. In the video body 25,
The tape 1 on which the images A, B, C ... Are recorded is set in advance. Then, it is judged whether or not the index information is input (step 100), and when the index information is input,
The index information is stored in the RAM 32 (step 110). Then, the above processing is repeatedly executed until the input of the index information is completed (step 120).

The index information is input by the user operating the input device 44. A personal computer may be used as the input device 44, and the index information may be edited on the personal computer and then input to the random reproduction control device 26 via the input circuit 40. Alternatively, the index information may be input from a keyboard serving as the input device 44 and the index information may be stored in the order of input.

The index information is, as shown in FIG.
The index number and the reproduction start position As and the reproduction end position Ae are set as one set, and the reproduction start position As is the respective images A, B, and B of the recorded tape 1 in which a plurality of images A, B, C ... Are recorded. C is an absolute address indicating the start position, and the reproduction end position Ae is an absolute address indicating the end position of each video A, B, C. Further, the index number is a number assigned to this set and may be a serial number or an arbitrary number as long as they do not overlap.

The index information includes an index number, a reproduction start position As and a reproduction end position Ae as one set, and is composed of a plurality of sets. The index number and the reproduction for each video image that the user wants to reproduce at random. The start position As and the reproduction end position Ae are input and stored.
Each of the videos A, B, C, ... May be a video obtained by subdividing one long time for each scene, or a plurality of completely different videos. Also, the playback start position A
s and the reproduction end position Ae are index numbers 1 in FIG.
As shown in FIG. 3, the images E and F of other index numbers 11 and 12 may be attached.

The reproduction start position As and the reproduction end position A
e is not limited to the absolute address recorded on the control track 1b, but a time code recorded on the video / hi-fi audio track 1a may be used. Also, by counting the pulse signals at regular intervals recorded on the control track 1b, the count value of the start position and the count value of the end position of each image A, B, C, ... It can be similarly implemented. In this case, the user sets the count value to zero and reproduces the tape 1 from the beginning,
It suffices to note down the count value of the video to be reproduced at random, and input this count value as the reproduction start position As where the video starts and the reproduction end position Ae where the video ends. When there are a plurality of images to be reproduced at random, the reproduction start position As and the reproduction end position Ae of the respective images A, B, C ... Are input.

In this embodiment, this index information is
As shown in FIG. 9, it is once edited on the personal computer and then input to the random reproduction control device 26 via the input circuit 40, and the index information is stored in the RAM 32. When the input of the index information is completed, the random reproduction control device 26 outputs the rewinding signal of the tape 1 to the communication circuit 22 of the video main body 25 via the communication circuit 34 (step 130). Then, the video main body 25 receives this rewinding signal and, via the drive control circuit 20, the tape 1
The tape 1 is rewound by outputting a signal for rewinding.

Then, it is judged whether or not the rewinding completion signal of the tape 1 is inputted from the video main body 25 through the communication circuit 34 (step 130), and when it is judged that the rewinding is completed, the tape 1 is run. Start signal of communication circuit 3
It outputs through 4 (step 150).

Next, the index information is output to the audio circuit 8 of the video main body 25 via the audio signal converting circuit 36 (step 160). At this time, the index information is converted from a digital signal to an analog signal by the audio signal conversion circuit 36 and output.

The index information sent to the audio circuit 8 is written at the beginning of the tape 1 by the audio / control head 4 or the video / hi-fi audio head 2 as shown in FIG. When writing the index information, identification signals are recorded at the beginning and the end of the index information, respectively.

When it is judged that the writing of the index information is completed (step 170), a stop signal for the tape 1 running is output to the video main body 25 (step 18).
0). Then, in the video main body 25, the running of the tape 1 is temporarily stopped and the control processing is ended.

Next, with respect to the random reproduction of the recorded tape 1 in which the index information is recorded by the above-mentioned processing, the reproduction main processing executed by the random reproduction control device 26 will be described with reference to the flowchart shown in FIG.
First, the index information recorded at the beginning of the tape 1 is read, a reading process (step 200) described below is executed, and then an input waiting screen is displayed (step 30).
0). As a result, the screen information stored in advance is output to the TV monitor 46 via the character generator 38, and the predetermined screen is displayed on the TV monitor 46.

Then, it is judged whether or not a signal for performing one reproduction is input from the input device 44 (step 31).
0) When the reproduction is one time, a reproduction process described later is executed (step 400). Alternatively, when the signal is a repeat reproduction signal for continuously reproducing a plurality of videos, repeat reproduction processing is executed (step 50).
0), if the signal is a memory reproduction signal for continuously reproducing a plurality of videos, a memory reproduction process is executed (step 600).

On the other hand, the reading process (step 200)
Then, as shown in FIG. 6, it is judged whether or not the signal in which the tape 1 is inserted into the video main body 25 is inputted through the communication circuit 34 (step 210). When it is determined that the tape 1 is inserted, a signal for rewinding the tape 1 is once output to the video main body 25 via the communication circuit 34 (step 2).
20).

Upon receipt of this signal, the video main body 25 rewinds the tape 1, and when the rewinding is completed, it outputs a rewinding completion signal to the random reproduction control device 26 via the communication circuit 22. Upon receiving this signal, the random reproduction control device 26 outputs a signal for starting reproduction to the video main body 25 (step 240).

When the running position of the tape 1 is detected by counting the pulse signals recorded on the control track 1b, a signal for resetting the count value of the counter 18 is output to the video main body 25 to output the count value. It suffices to output a signal for starting the reproduction after making it zero. As a result, the count value indicates the running position from the beginning of the tape 1.

As a result, reproduction of the tape 1 is started from the beginning, the index information recorded at the beginning is read into the audio circuit 8 via the audio / control head 4, and the audio signal of the random reproduction control device 26 is read. It is input to the conversion circuit 36. Then, this signal is converted from an analog signal to a digital signal and recorded in the RAM 32 (step 250).

Next, it is judged whether or not the reading is completed (step 260). This judgment is made based on whether or not the identification signals recorded before and after the index information are read when the index information is read. When the reading is not completed, it is judged whether the reading is possible or not based on the time required for the reading (step 270). When it is judged that the reading is possible, the processing from step 220 onward is repeatedly executed, After the tape 1 is rewound once, the index information is read again.

Alternatively, when it is determined that the reading is impossible, an error signal is output (step 280),
A message indicating that reading is impossible is displayed on the TV monitor 46, and processing such as prohibiting the following processing is executed. When the reading is completed, this reading process is ended and the process returns to the reproduction main process.

Next, the above-mentioned reproduction processing (step 40)
0) will be described with reference to the flowchart of FIG.
First, it is judged whether or not there is an instruction key input of an index number to be reproduced from the input device 44 via the input circuit 40 (step 404), and the input index number is temporarily stored in the RAM 32 (step 406).

Subsequently, the screen being displayed is displayed on the TV monitor 46 via the character generator 38 (step 410), and a start signal for running the tape 1 is output to the video main body 25 via the communication circuit 34. (Step 415). As a result, in the video main body 25, the tape 1
The tape running position detection circuit 18 reads the absolute address recorded on the control track 1b of the tape 1 via the voice / control head 4 and detects the running position of the tape 1.

Next, the CPU 28 reads the reproduction start position As stored in the RAM 32 corresponding to the instructed index number (step 420), and also reads the reproduction end position Ae (step 425). Thereafter, the reproduction start position As is compared with the current absolute address B (step 430). When the reproduction start position As is larger than the current absolute address B, a fast-forward signal is sent to the video main body 25 via the communication circuit 34. Is output (step 43
5).

Further, the current absolute address B is the reproduction start position A.
If it is larger than s, the rewind signal is output to the video main body 25 via the communication circuit 34 (step 440).
As a result, the video main body 25 performs fast forward or rewind according to this signal. When the reproduction start position As and the current absolute address B match, a reproduction start signal is output to the video main body 25 (step 445). The video main body 25 receives this signal, reproduces the tape 1, detects the video signal recorded on the tape 1, and sends it to the video circuit 6.

The video signal is sent from the video circuit 6 to the character generator 38 of the random reproduction control device 26,
Directly from the character generator 38 to the TV monitor 4
6, and the video is reproduced. Similarly, voice is also sent from the voice / control head 4 and the voice circuit 8 to the voice signal conversion circuit 36, and is output to the TV monitor 46 as it is.

During reproduction, the reproduction end position Ae is compared with the current absolute address B (step 450). When the current absolute address B is smaller than the reproduction end position Ae, reproduction is continued, and when they coincide with each other. , And outputs a reproduction stop signal to the video main body 25 via the communication circuit 34 (step 4).
55). When the reproduction stop signal is output, the process returns to the reproduction main process. The video main body 25 receives this signal,
Stop playing tape 1.

In the case of the configuration in which the pulse position recorded on the control track 1b is counted instead of detecting the absolute address of the running position of the tape 1, the present count value counted from the beginning of the tape 1 It may be determined by comparing B with the reproduction start position As and the reproduction end position Ae.

Next, the repeat reproduction process (step 5)
00) will be described with reference to the flowchart of FIG. First, when it is desired to perform repeat reproduction in which three images B, D, E of the plurality of images A, B, C ... Are continuously and repeatedly reproduced, first, index numbers 2, 4, 1
Press the key to specify 1. Then, it is judged whether or not there is this key input (step 510), and when there is an input, the index numbers 2, 4 and 11 are stored in the RAM.
It is stored in 32 (step 520). When it is judged that the input of the index numbers 2, 4 and 11 is completed and the key input for starting the repeat reproduction is made (step 530), the repeat reproduction is executed (step 540).

Then, it is judged whether or not there is a key input of the stop command (step 550), and until the stop command is given,
When repeat playback is repeated and there is a stop command,
A reproduction stop signal is output to the video main body 25 (step 560). Then, in the video main body 25, the reproduction of the tape 1 is stopped.

Further, in the memory reproduction (step 600), for example, the index numbers 2, 4, and 11 of the three images B, D, and E to be continuously reproduced are keyed in, and according to the index numbers 2, 4, and 11. First, the image with the index number 2 is reproduced in the same manner as in steps 406 to 455 of the reproduction process, next, the image with the index number 4 and then the image with the index number 11 are reproduced.

In the memory reproduction process (step 600), the video of the stored index number is reproduced once, and the process ends, but the repeat reproduction process (step 500) is performed in advance in the same manner as the memory reproduction process (step 600). Is stored in the RAM 32, and the images of the plurality of stored index numbers are repeatedly reproduced until a stop command is issued. If only one index number is input, the video is repeatedly played until there is a stop command.

In the present embodiment, the index number of the image to be reproduced is designated by key input, but not limited to this, the index number of the image to be randomly reproduced is shown in FIG.
When the index information is preliminarily written together with the index information in a predetermined portion of the index writing section shown in FIG. 6 and the index information is reproduced (step 200), this index number is read, the reproduction process (step 400), the repeat reproduction process (step 500). The memory reproducing process (600) may be executed.

In the present embodiment, the processing of steps 100 to 180 is executed by the index recording means M3.
And the execution of the processing from step 210 to step 230 functions as rewinding control means M4, and step 24
The processing from 0 to step 260 is executed by the storage control means M5.
The execution of the processing from step 404 to step 455 functions as the random reproduction means M6.

Further, in the present embodiment, the video main body 25 and the random reproduction control device 26 are constructed as separate bodies, but they may be constructed as one body and controlled by one CPU. Further, in the above-mentioned processing, step 43
When it is determined that the values match with 0, the tape 1 is immediately played back. However, after it is determined that the values match with each other in step 430, the tape 1 is temporarily stopped, and the playback waits for a playback start command to start playback. May be provided.

As described above, according to the video tape recorder with the random reproduction function of this embodiment, when the tape 1 having index information recorded at the head is reproduced, the tape 1 is rewound and the index information is stored. The video is reproduced from the reproduction start position As to the reproduction end position Ae based on the index number.

Therefore, it is possible to easily reproduce only a predetermined image at random by a simple operation of designating the index number. Further, by designating a plurality of index numbers and performing repeat reproduction or memory reproduction (steps 500 and 600), a predetermined image among a plurality of images A, B, C, etc. recorded on the tape 1 can be easily displayed. It can be continuously reproduced at random, and can be used as a display device for repeatedly displaying each image A, B, C, ... In a store demonstration by video.

Moreover, the content to be reproduced can be easily changed only by changing the index number, and even if the recording time of the tape 1 is short, a plurality of images A, B, C ...
By changing the order or combination of playing, it is possible to play as a video with different long-time contents.

Furthermore, by re-recording only a part of the image, for example, the image C on another image, only a part of the image that is randomly reproduced is replaced, so that the index number is not rewritten and the video is rewritten. It is also possible to use tape. Since the index signal is written by voice, the indexed tape can be easily duplicated by dubbing.

The present invention is not limited to the embodiments as described above, and can be carried out in various modes without departing from the gist of the present invention.

[0059]

As described in detail above, the video tape recorder with a random playback function of the present invention can easily perform random playback by a simple operation for indicating an index number without providing a blank portion. Only the video you want to play can be played at random without re-editing. Further, there is an effect that it is possible to easily adopt a configuration in which a plurality of index numbers are designated and a predetermined image of a plurality of images recorded on a tape is continuously reproduced at random.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a basic configuration of a video tape recorder with a random playback function of the present invention.

FIG. 2 is a schematic configuration diagram of a video tape recorder with a random reproduction function as one embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating recording tracks on the tape of this embodiment.

FIG. 4 is a flowchart showing an example of a writing process performed in the random reproduction control device according to the present embodiment.

FIG. 5 is a flowchart showing an example of a reproduction main process performed in the random reproduction control device of the present embodiment.

FIG. 6 is a flowchart showing an example of a reading process performed in the random reproduction control device according to the present embodiment.

FIG. 7 is a flowchart showing an example of a reproduction process performed in the random reproduction control device of the present embodiment.

FIG. 8 is a flowchart showing an example of repeat reproduction processing performed in the random reproduction control device of the present embodiment.

FIG. 9 is an explanatory diagram illustrating index information according to the present embodiment.

FIG. 10 is an explanatory diagram illustrating index information recorded on a recorded tape according to the present embodiment.

[Explanation of symbols]

M1 ... Tape traveling position detecting means M2 ... Recording / reproducing means M3 ... Index recording means M4 ... Rewinding control means M5 ... Storage controlling means M6 ... Random reproducing means 1 ... Tape 2 ... Video / hi-fi audio head 4 ... Audio / control head 10 ... Recording / playback control circuit 18 ... Tape running position detection circuit 25 ... Video body 26 ... Random playback control device 46 ... TV monitor

Claims (1)

[Claims] 1. A video tape comprising: a tape running position detecting means for detecting a running position of a tape; and a recording / playback means for running the tape and recording or reproducing information recorded on the tape. In the recorder, by controlling the recording / reproducing means, at the beginning of the tape,
Index recording means for recording index information of a plurality of index numbers and a plurality of sets of reproduction start position and reproduction end position corresponding to each index number; and to the beginning of the tape by controlling the recording / reproducing means during reproduction. Rewinding rewinding control means, storage control means for controlling the recording / playback means after the rewinding to play back at least the index information at the beginning of the tape and storing the index information, and the index number specified The reproduction start position and the reproduction end position are read from the storage control means, and the recording / reproducing means is controlled based on the tape traveling position detected by the tape traveling position detecting means. To a reproduction end position, the random reproduction means for reproducing the video image, A video tape recorder with a random playback function.