JPH08147800A - Video tape recorder - Google Patents

Abstract

PURPOSE: To start reproducing a recorded program from the top subject to continued recording even when timer reservation video recording is being performed lightening the burden of cost. CONSTITUTION: When a reproduction operation command is issued in recording in a first mechanism section 1 in timer reservation video recording, a system control section 7 connects a second mechanism section 2 to a reproduced signal processing section 5 by controlling a switch circuit 6. And the section 7 connects a second mechanism section 2 to a recorded signal processing section 4 and makes it a recording state, after the first mechanism section 1 is rewound, reproduction operation is performed, these operation is alternately repeated by the first mechanism section 1 and the second mechanism 2.

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 (hereinafter referred to as "VTR"), and more particularly to a technique for timer reservation recording in a VTR having a plurality of mechanism parts in one housing. Is.

[0002]

2. Description of the Related Art The greatest advantage of using a VTR is a so-called time shift function, which is that a TV program sent by radio waves or the like can be timer-reserved for recording and then played back at a convenient time later.

FIG. 12 is a block diagram showing a structure of a conventional VTR having a single mechanism section (a portion surrounded by a broken line 10) and an antenna for receiving a radio wave of a television program sent from a broadcasting station. FIG. 3 is a system configuration diagram including a monitor television 20 for reproducing and viewing a VTR. The VTR 10 is a mechanism part 1 for running a magnetic tape (not shown) stored in a cassette and recording / reproducing a video / audio signal on / from the magnetic tape by a rotary head or a fixed head. A recording signal processing unit 4 including a tuner circuit for selecting a desired program from the generated signal and a modulation circuit for separating a demodulated video / audio signal and converting the signal into a recording signal on the magnetic tape. The reproduction signal processing unit 5 that demodulates the reproduction signal output from the mechanism unit 1 during the reproduction operation to output the video / audio signal, the mechanism unit 1, the recording signal processing unit 4, and the reproduction signal processing unit 5 are set to the respective operation modes. And a system control unit 7 for controlling the operation.

Here, in order to perform timer reserved recording in the VTR 10, it is necessary to specify to the system control section 7 the program to be recorded by the channel information and the recording start / end time before being broadcast. The system control section 7 has a clock function, and when the designated recording start time comes, it activates the recording signal processing section 4 to tune the tuner to the designated channel and put the mechanism section 1 into the recording mode. The magnetic tape is caused to run, and the recording signal of the video / audio signal from the recording signal processing unit 4 is recorded on the magnetic tape. Then, at the designated recording end time, the system control unit 7 stops the running of the magnetic tape of the mechanism unit 1 and stops the power supply to the recording signal processing unit 4 to complete the timer reserved recording. Therefore, the program can be watched at any time by playing back the magnetic tape for which timer reserved recording is completed.

[0005]

As described above, the time shift function of the VTR is basically a convenient function, but the problem is that the timer reservation recording is completed once the timer reservation recording state is entered. The point is that you cannot play it back until you do. It is quite natural, for example, that you set up timer reserved recording to go out during the time when the program you want to watch is broadcast, but you went out earlier than planned, but you are in the process of recording To be This case will be described with reference to the timing chart of FIG.

[0006] FIG. 13 shows that when timer reserved recording is set for a program from 21:00 to 23:00 using the conventional VTR 10 shown in FIG. 12, he came home at 21:30, which is earlier than the scheduled time, but recorded at 23:00. It is a timing chart when the tape is rewound and played after waiting for the end. Here, “REC” means a recording operation, “REW” means a rewinding operation, and “PB” means a reproducing operation.

When I got home at 21:30, the program was 30
It's been a minute, and you can watch it on air from there, but it's generally uninteresting because you missed the "head" of the program. Therefore, the choice is to wait until 23:00 until the end of recording and play it back or watch it at a later date. However, if you watch it immediately, if the tape rewinding time is 2 minutes, the playback will end. The time is 1:02 am. This is because I was waiting for 1 hour and 30 minutes from 21:30 to 23:00 when I got home.

From the above, I managed to go home 21
The problem was that it could not be seen from the "head" of the program from 30 minutes.

Conventionally, as a means for solving the above problems, there is a method of using two VTRs as shown in FIG. That is, timer reservation recording with the same content is set in two VTRs, VTR 10 and VTR 40, and when one returns home, one VTR, for example, VTR 10, is stopped for recording and rewound to the recording start point for reproduction. Then, at the recording end point, timer recording is set again to restart the recording, and the recording of the VTR 40 is stopped to rewind to the same reproduction video position as the reproduction end point of the VTR 10 for reproduction. Then, at the recording end point, the timer recording is set again to restart the recording, and the VTR 10 is stopped and the VTR 4 is stopped.
Rewind to the same playback video position as the playback end point at 0 and play back.

Although the above problem can be solved by repeating the above, there are still problems that two VTR bodies are required and the operation is very complicated. It is possible to automate all operations, but VTR10 and VTR
A dedicated controller 50 for controlling communication with each of the 40 system control units 7 is required. Therefore, there remains a problem that the burden becomes large in terms of cost.

By the way, a plurality of Vs are provided in one housing.
A "video cassette recording / tape forming device" having a TR portion has been proposed (Japanese Patent Laid-Open No. 61-80583), which is provided with two VTR portions in one housing and outputs respective input / output signals. It only facilitates tape duplication by switching within the device.

The present invention was devised in view of such circumstances, and while reducing the cost burden,
An object of the present invention is to provide a video tape recorder capable of continuing the recording and starting the reproduction of the recorded program from the beginning even when the timer reserved recording is being executed.

[0013]

According to a first aspect of the present invention, there is provided a video tape recorder having first and second mechanism portions for recording / reproducing a video / audio signal on a magnetic tape, and a video image to be recorded. A recording signal processing unit, which receives an audio signal, converts it into a recording signal on the magnetic tape and outputs the recording signal to the first and second mechanism units, and a reproduction signal from the magnetic tape, which is a video / audio signal. To a reproduction signal processing unit, a switch circuit for switching connection between the first and second mechanism units and the reproduction signal processing unit, the first and second mechanism units, and A recording signal processing unit, a reproduction signal processing unit, and a system control unit that controls the switch circuit. The system control unit receives a reproduction operation command during the recording operation of the first mechanism unit. Has means for controlling the first and second two mechanism parts so as to alternately repeat the recording operation and the rewinding reproduction operation at a cycle based on the first recording time by the first mechanism part. It is characterized by being present.

According to a second aspect of the present invention, there is provided a video tape recorder, wherein the first to third mechanism parts for recording / reproducing the video / audio signal on the magnetic tape and the video / audio signal to be recorded are input. A recording signal processing unit for converting the recording signal on the magnetic tape and outputting it to the three first to third mechanism units, and a reproduction signal processing for converting the reproduction signal on the magnetic tape into a video / audio signal. Section, a switch circuit for switching connection between the first to third three mechanism sections and the reproduction signal processing section, the first to third three mechanism sections, the recording signal processing section and the The system control unit includes a reproduction signal processing unit and a system control unit that controls the switch circuit. The system control unit is configured to operate after the reproduction operation command is input during the recording operation of the first mechanism unit. It is characterized in that the three mechanisms portions from 1 third has a means for controlling so as to repeat alternately the rewinding operation and playback operation and the recording operation.

According to a third aspect of the present invention, there is provided a video tape recorder comprising: a first and a second mechanism section for recording / reproducing a video / audio signal on a magnetic tape; and a third mechanism section for recording at least a video / audio signal. On the magnetic tape, a mechanism section, a recording signal processing section for receiving a video / audio signal to be recorded, converting the signal into a recording signal on the magnetic tape, and outputting the recording signal to the three first to third mechanism sections. A reproduction signal processing unit for converting a reproduction signal from the video signal into a video / audio signal;
And a switch circuit for switching connection between the second two mechanism parts and the reproduction signal processing part, the first to third three mechanism parts, the recording signal processing part, the reproduction signal processing part, and the The system control unit controls a switch circuit, and the system control unit controls the first and second mechanism units after the reproduction operation command is input during the recording operation of the first and third mechanism units. The two mechanism units alternately control the recording operation and the rewinding reproduction operation in a cycle conforming to the first recording time by the first mechanism unit, and the third mechanism unit controls so as to continue the recording operation. It is characterized by having means.

According to a fourth aspect of the present invention, in the video tape recorder, the first and second mechanism parts for recording / reproducing the video / audio signal on the magnetic tape and the video / audio signal to be recorded are input. A recording signal processing section for converting into a recording signal on a magnetic tape and outputting to the first and second mechanism sections, and a reproduction signal from the magnetic tape for converting into a video / audio signal and the recording A reproduction signal processing unit that also outputs to the signal processing unit, a switch circuit that switches the connection between the first and second mechanism units and the reproduction signal processing unit, and the first and second two units. A mechanism section, a recording signal processing section, a reproduction signal processing section, and a system control section for controlling the switch circuit, wherein the system control section is configured to perform a reproduction operation during the recording operation of the first mechanism section. Wherein after the decree is entered first and the second
The two mechanism parts of (1) perform the recording operation and the rewinding reproduction in a cycle conforming to the first recording time by the first mechanism part, and alternately repeat the fast-forward operation for the recording time by the second mechanism part, and It is characterized in that it has means for controlling so as to copy the recorded portion by the second mechanism portion to the fast-forward operation portion of the magnetic tape of the first mechanism portion after the reproduction.

A video tape recorder according to a fifth aspect of the present invention is the video tape recorder according to any one of the first to fourth aspects, wherein the system control section is configured to operate when a reproduction operation command is input during the recording operation of the first mechanism section. When the first recording time by the first mechanism unit is less than the first predetermined time, the recording medium has a control unit that extends the recording time by the first mechanism unit until it reaches the first predetermined time. It is characterized by that.

According to a sixth aspect of the present invention, in the video tape recorder according to the first to fifth aspects, the system control section sets the tape speed V during the reproducing operation of each mechanism section to V≈V _0. ( n-1) / n (however, V
₀ is a tape speed at the time of recording, and n is a negative integer), and means for controlling the reproduced video / audio signal so as to be temporally close to the video / audio signal to be recorded is provided. It is a thing.

A video tape recorder according to a seventh aspect of the present invention is the video tape recorder according to the sixth aspect, wherein the system control section sets the tape speed V during the reproduction operation of each mechanism section.
By reproducing at V≈V ₀ · (n−1) / n (where V ₀ is the tape speed at the time of recording and n is a negative integer), even one of the mechanism parts has the second predetermined recording time. When the time is less than or equal to the time, the recording operation is stopped, and means for controlling so as to directly output the video / audio signal to be recorded as a reproduced video signal is provided.

A video tape recorder according to an eighth aspect of the present invention is the video tape recorder according to any one of the first to seventh aspects, wherein each mechanism section records an index signal at the start and end of the recording operation to rewind or It is characterized in that it is used to detect the reproduction start position and the reproduction end position of the reproduction operation.

[0021]

According to the first aspect of the present invention, when a reproduction operation command is given to the system control section during timer reserved recording execution by the first mechanism section, the system control section includes two mechanism sections and a recording signal processing section. By controlling the reproduction signal processing unit and the switch circuit, the operation of recording the two mechanism units at a cycle in accordance with the recording time from the first recording start to the reproduction operation command and the operation of rewinding and reproducing are alternately repeated. To control. Therefore, even while the timer reserved recording is being executed, it is possible to start the reproduction of the recorded program from the beginning while continuing the recording. Moreover, the configuration for that is relatively simple, and the cost burden can be reduced.

According to the second aspect of the present invention, since the three mechanism parts are controlled to alternately repeat the recording operation, the rewinding operation and the reproducing operation, the reproducing operation can be performed even during the rewinding operation. In the case of 1, the interruption of the reproduction operation at the time of rewinding can be eliminated, and continuous reproduction can be performed.

In the structure of claim 3, since the recording operation is continued by the third mechanism portion, in addition to the operation of claim 1, one magnetic tape is used consistently from the beginning to the end of the timer-reserved recording program. It becomes possible to reproduce.
That is, when the content is reproduced again later, it is possible to eliminate the inconvenience that the operability is poor because the program content is divided into two magnetic tapes as in the first aspect.

According to the structure of claim 4, there is only two mechanism parts by copying after the reproduction from the head is finished during timer reserved recording execution.
The same effect is exhibited.

In the structure of the fifth aspect, it is possible to prevent the loss of time from increasing due to frequent switching of the operation of the mechanism section.

According to the sixth aspect of the present invention, the time required for reproduction is shortened while the video and audio are brought into a state close to natural by the special reproduction operation.

In the structure of claim 7, the reproduced video signal catches up with the input video signal in time, and thereafter, it can be watched on air, and it ends at the broadcast end time of the program. .

According to the eighth aspect of the invention, the reproduction start position and the reproduction end position can be searched at high speed and with high accuracy.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a video tape recorder (VTR) according to the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram showing a structure of a first embodiment of a VTR of the present invention (a portion surrounded by a broken line 10) and a radio wave of a television program sent from a broadcasting station. FIG. 1 is a system configuration diagram including an antenna 30 for receiving and a monitor television 20 for reproducing and viewing a VTR. The VTR 10 includes a first mechanism unit 1 and a second mechanism unit 2 which run a magnetic tape (not shown) stored in a cassette and record / reproduce a video / audio signal on / from the magnetic tape by a rotary head or a fixed head. , A tuner circuit for selecting a desired program from a signal input by the antenna 30 during a recording operation, a modulation circuit for separating a demodulated video / audio signal and converting each into a recording signal which can be recorded on the magnetic tape, etc. A recording signal processing unit 4 composed of
A reproduction signal processing unit 5 that demodulates a reproduction signal output from one of the two mechanism units 1 and 2 and outputs a video / audio signal during a reproduction operation, and a first mechanism unit 1 and a second mechanism unit. Switch circuit 6 for switching the connection between the reproduction signal processing section 5 and the reproduction signal processing section 5, and the first mechanism section 1
The second mechanism section 2, the recording signal processing section 4, the reproduction signal processing section 5, and the system control section 7 for controlling the switch circuit 6 according to each operation mode.

In the VTR 10 configured as described above, when timer reserved recording is set for a program from 21:00 to 23:00, the system controller 7 reproduces the timer reserved recording, for example, at 21:30. The operation when the start command is input will be described with reference to the timing chart of FIG. 2 and the flowchart of FIG.

FIG. 2 shows the operating states of the first mechanism unit 1 (denoted as mechanism 1) and the second mechanism unit 2 (denoted as mechanism 2) incorporated in the VTR 10 of FIG. And the switching control signal of the switch circuit 6 output from the system control unit 7. here,
"REC" is for recording operation, "PB" is for reproducing operation, and "R" is for
"EW" means a rewinding operation. Further, the switching control signal of the switch circuit 6 is a binary signal, and when the high level is “1”, the first mechanism section 1 and the reproduction signal processing section 5 are connected to each other, and the reproduction signal of the first mechanism section 1 is connected. The output is input to the reproduction signal processing unit 5. When the low level is “0”, the second mechanism unit 2 and the reproduction signal processing unit 5 are connected, and the reproduction signal output of the second mechanism unit 2 is input to the reproduction signal processing unit 5. FIG. 3 is a flowchart of a software program installed in a microcomputer (not shown) which is the core of the system control unit 7.

The system control section 7 starts the recording signal processing section 4 by the timer processing 71, the first mechanism section control processing 73 and the recording signal processing section control processing 75 of FIG. The tuner is tuned to the reserved channel, and the magnetic tape is run by setting the first mechanism unit 1 to the recording mode, and the recording signal of the video / audio signal from the recording signal processing unit 4 is recorded on the magnetic tape. (REC (1) part in FIG. 2). If nothing is left as it is, the recording is continued until 23:00. However, since the reproduction start command is input at 21:30 on the way, the system control unit 7 detects it by the key input processing 72 of FIG. The second mechanism unit 2 is set to the recording mode by the second mechanism unit control processing 74 and the recording signal processing unit control processing 75 of FIG. Recorded on a magnetic tape (REC (2) in Fig. 2)
Part (about 32 minutes), at the same time, after the first mechanism part 1 is stopped by the first mechanism part control processing 73 in FIG. 3, the first mechanism part 1 is rewound to the tape position at the start of recording (in FIG. 2). REW (1) part). In this case, if the index signal or the time code is used to detect the tape position at the start of recording, the search can be performed at high speed.

When the rewinding to the tape position at the start of recording is completed, the switch circuit 6 is connected to the first mechanism section 1 side by the switch circuit control processing 77 shown in FIG.
The first mechanism unit control processing 73 and the reproduction signal processing unit control processing 76 cause the first mechanism unit 1 to shift to the reproduction mode to run the magnetic tape, and the reproduction signal from the magnetic tape is transmitted to the reproduction signal processing unit 5. Demodulate and output the video and audio signal to the monitor TV 20 (PB in FIG. 2)
(Part (1)). If the rewinding time takes 2 minutes, the reproduction by the first mechanism unit 1 ends at 22:02. If an index signal, a time code, or the like is used to detect the reproduction end position, it is possible to search accurately and easily.

When the reproduction end position is reached, the system control section 7 sets the first mechanism section 1 by the first mechanism section control processing 73, the recording signal processing section control processing 75 and the second mechanism section control processing 74 of FIG. In the recording mode, the magnetic tape is run, and the recording signal of the audiovisual signal from the recording signal processing unit 4 is recorded on the magnetic tape (R in FIG. 2).
At the same time as the EC (3) portion (about 34 minutes), the second mechanism unit 2 is stopped for recording and then rewound to the tape position at the start of recording (REW (2) portion in FIG. 2). When the rewinding to the tape position at the start of recording is completed, the switch circuit 6 is connected to the second mechanism unit 2 side by the switch circuit control process 77 of FIG. 3, and the second mechanism unit control process 74 of FIG. Reproduction signal processing unit control processing 7
6, the second mechanism unit 2 is switched to the reproduction mode to run the magnetic tape, the reproduction signal from the magnetic tape is demodulated in the reproduction signal processing unit 5, and the video / audio signal is output to the monitor television 20 (FIG. 2). Part of PB (2); about 32 minutes).

Similarly, the first mechanism unit 1
At around 36 minutes, the rewinding operation (the portion of REW (3) in FIG. 2) to the recording start position of REC (3) in FIG. 2 is started,
Next, playback operation (PB (3) part in FIG. 2; about 34 minutes)
It ends at around 23:12. The second mechanism unit 2 starts the recording operation at about 22:36 and ends the recording operation at 23:00, which is the end time of timer reserved recording (REC (4) part in FIG. 2; about 24 minutes), REC (4) in Figure 2
Rewinding operation to the recording start position of
(Part (4)) is performed. Then, the first mechanism unit 1
When the reproduction operation (part PB (3) in FIG. 2) is completed, the reproduction operation (part PB (4) in FIG. 2; about 24 minutes) starts, and the reproduction operation ends at about 23:36.

As described above, the recording operation and the rewinding reproduction operation are alternately performed by using the two mechanisms. In this case, a rewinding operation is performed four times during the reproduction, but some loss time occurs. , It will be possible to watch the program being broadcast from the beginning of the program with a delay of about 36 minutes. In this embodiment, the reproduction is delayed by 30 minutes,
If it is played back with a delay of 1 hour, it will be possible to watch it from the beginning of the program with a delay of about 1 hour and 2 minutes.

By the way, if the delay time T1 of the reproduction start command from the start of the program is, for example, about 10 minutes, the operation switching of the two mechanism parts becomes frequent and the loss time becomes large. In such a case, The system control section 7 automatically shifts for 20 minutes and then starts the reproduction.

(Second Embodiment) FIG. 4 is a block diagram showing the structure of a second embodiment of the VTR of the present invention (a portion surrounded by a broken line 10) and a radio wave of a television program sent from a broadcasting station. FIG. 1 is a system configuration diagram including an antenna 30 for receiving and a monitor television 20 for reproducing and viewing a VTR. The VTR 10 includes a first mechanism unit 1 and a second mechanism unit 2 which run a magnetic tape (not shown) stored in a cassette and record / reproduce a video / audio signal on / from the magnetic tape by a rotary head or a fixed head. The third mechanism section 3 and a tuner circuit for selecting a desired program from a signal input by the antenna 30 during a recording operation and a demodulated video / audio signal are separated into recording signals which can be recorded on the magnetic tape. A recording signal processing unit 4 including a modulation circuit that performs conversion processing, and a reproduction that outputs a video / audio signal by demodulating a reproduction signal output from any one of the three mechanism units 1, 2 and 3 during a reproduction operation. A signal processing unit 5,
A switch circuit 6 for switching the connection between the reproduction mechanism processing unit 5 and the first mechanism unit 1, the second mechanism unit 2 and the third mechanism unit 3, and the first mechanism unit 1 and the second mechanism unit 5. 2, a third mechanism section 3, a recording signal processing section 4, a reproduction signal processing section 5, and a system control section 7 for controlling the switch circuit 6 in accordance with each operation mode.

In the VTR 10 configured as described above, when timer reserved recording is set for a program from 21:00 to 23:00, the system controller 7 reproduces the timer reserved recording, for example, at 21:30. The operation when the start command is input will be described with reference to the timing chart of FIG. FIG. 5 shows a first mechanism unit 1 (denoted as mechanism 1), a second mechanism unit 2 (denoted as mechanism 2), and a third mechanism unit incorporated in the VTR 10 of FIG. 3 (denoted as mechanism 3) represents the operating state. Here, “REC” means a recording operation, “PB” means a reproducing operation, and “REW” means a rewinding operation.

At 21:00, which is the start time of timer reserved recording, the system control unit 7 activates the recording signal processing unit 4 to select the tuner to the reserved channel and set the first mechanism unit 1 to the recording mode. The magnetic tape is run to record the recording signal of the video / audio signal from the recording signal processing unit 4 on the magnetic tape (REC in FIG. 5).
(Part (1)). If nothing is left as it is, recording is continued until 23:00. However, since the reproduction start command was input at 21:30 on the way, the system controller 7
Sets the second mechanism unit 2 to the recording mode and runs the magnetic tape, and records the recording signal of the audiovisual signal from the recording signal processing unit 4 on the magnetic tape (REC in FIG. 5).
At the same time, the first mechanism unit 1 is stopped to record, and then rewound to the tape position at the start of recording (REW (1) part in FIG. 5). In this case, if the index signal or the time code is used to detect the tape position at the start of recording, the search can be performed at high speed.

After the recording by the second mechanism section 2 is performed for a predetermined time, for example, 15 minutes, the third mechanism section 3 is set to the recording mode, the magnetic tape is run, and the video / audio signal from the recording signal processing section 4 is set. The signal recording signal is recorded on the magnetic tape (REC (3) portion in FIG. 5), and at the same time, the switch circuit 6 is connected to the first mechanism section 1 side to set the first mechanism section 1 to the reproduction mode. The magnetic tape is moved to run, the reproduction signal from the magnetic tape is demodulated in the reproduction signal processing unit 5, and the video / audio signal is output to the monitor television 20 (PB (1) portion in FIG. 5). After stopping the recording of mechanism 2 of No. 2, it is rewound to the tape position at the start of recording (REW (2) in FIG. 5).
Part). Therefore, the VTR 10 starts reproduction at 21:45, which is 15 minutes behind the reproduction start command at 21:30. The reproduction by the first mechanism unit 1 ends at 22:15, but if an index signal, a time code, or the like is used to detect the reproduction end position, accurate and easy search can be performed.

When the reproduction end position is reached, the system control unit 7 sets the first mechanism unit 1 in the recording mode to run the magnetic tape, and records the recording signal of the video / audio signal from the recording signal processing unit 4 on the magnetic tape. Let (RE in Figure 5
(C (4) portion) at the same time, the switch circuit 6 is connected to the second mechanism section 2 side to shift the second mechanism section 2 to the reproduction mode to run the magnetic tape, and the reproduction signal from the magnetic tape is transmitted. Is reproduced in the reproduction signal processing unit 5 to output a video / audio signal to the monitor TV 20 (see PB in FIG. 5).
(Part (2)), and after the recording of the third mechanism 3 is stopped, the rewinding operation is performed to the tape position at the start of recording (the part of REW (3) in FIG. 5). The reproduction by the second mechanism unit 2 ends at 22:30. Next, the system control unit 7 sets the second mechanism unit 2 in the recording mode to run the magnetic tape, and records the recording signal of the video / audio signal from the recording signal processing unit 4 on the magnetic tape (REC (Fig. 5). At the same time as (5) part), the switch circuit 6 is connected to the side of the third mechanism section 3 to shift the third mechanism section 3 to the reproduction mode to run the magnetic tape and reproduce the reproduction signal from the magnetic tape. The signal processing unit 5 demodulates and outputs a video / audio signal to the monitor TV 20 (PB (3) part in FIG. 5), and after stopping the recording of the first mechanism 1, REC (4) in FIG. The rewinding operation is performed up to the recording start position of (REW (4) portion in FIG. 5).

By alternately performing the recording operation, the rewinding operation, and the reproducing operation by using the three mechanisms as described above, the reproducing operation can be performed even during the rewinding operation. In the first embodiment, the generated magnetic tape is used. It is possible to eliminate the interruption (loss time) of the reproduction operation due to the rewinding operation.

In this embodiment, the reproduction operation is instructed with a delay of 30 minutes, and the actual reproduction operation is started 15 minutes after that, the first recording time of the second mechanism section 2 (REC in FIG. 5). Basically, there is no problem if the portion (2) is longer than the rewinding time of the first mechanism unit 1 (the portion REW (1) in FIG. 5). Further, as in the first embodiment, in the present embodiment, a reproduction command is input with a delay of 30 minutes from the start of recording, and if reproduction is performed with a delay of 1 hour, about 1 hour 1
It will be possible to watch from the beginning of the program with a delay of 5 minutes.

(Third Embodiment) FIG. 6 is a block diagram showing a structure of a third embodiment of a VTR of the present invention (a portion surrounded by a broken line 10) and a radio wave of a television program sent from a broadcasting station. FIG. 1 is a system configuration diagram including an antenna 30 for receiving and a monitor television 20 for reproducing and viewing a VTR. The VTR 10 includes a first mechanism unit 1 and a second mechanism unit 2 which run a magnetic tape (not shown) stored in a cassette and record / reproduce a video / audio signal on / from the magnetic tape by a rotary head or a fixed head. , A third mechanism section 3 for recording (not reproducing) at least a video / audio signal, a tuner circuit for selecting a desired program from a signal input by the antenna 30 during a recording operation, and a demodulated video / audio signal. A recording signal processing unit 4 composed of a modulation circuit or the like for performing a conversion process to a recording signal which can be separately recorded on the magnetic tape, and a first and a second recording unit 4 during a reproducing operation.
A reproduction signal processing unit 5 for demodulating a reproduction signal output from any one of the mechanism units 1 and 2 and outputting a video / audio signal, a first mechanism unit 1 and a second mechanism unit 2, and a reproduction signal processing Switch circuit 6 for switching connection with unit 5, first mechanism unit 1 and second mechanism unit 2
The third mechanism section 3, the recording signal processing section 4, the reproduction signal processing section 5, and the system control section 7 for controlling the switch circuit 6 according to each operation mode.

In the VTR 10 configured as described above, when timer reserved recording is set for a program from 21:00 to 23:00, the system controller 7 reproduces the timer reserved recording, for example, at 21:30. The operation when the start command is input will be described with reference to the timing chart of FIG. FIG. 7 shows a first mechanism unit 1 (denoted as mechanism 1), a second mechanism unit 2 (denoted as mechanism 2) and a third mechanism unit incorporated in the VTR 10 of FIG. 3 (denoted as mechanism 3) represents the operating state. Here, “REC” means a recording operation, “PB” means a reproducing operation, and “REW” means a rewinding operation.

The operation of the first mechanism section 1 and the second mechanism section 2 is exactly the same as that of the first embodiment, so the description thereof is omitted.

In this embodiment, while the recording operation and the rewinding reproduction operation by the first mechanism unit 1 and the second mechanism unit 2 are being repeated, the same program is started from the beginning to the end by the third mechanism unit 3. Is recorded on a single magnetic tape. In other words, although the broadcast program can be time-shifted and viewed by the first mechanism unit 1 and the second mechanism unit 2, since the recorded magnetic tape is divided into two, it cannot be reproduced again. It's very inconvenient. Therefore, when reproducing again, one magnetic tape recorded by the third mechanism section 3 is used. This magnetic tape may be loaded into the first mechanism unit 1 or the second mechanism unit 2 and reproduced.

(Fourth Embodiment) FIG. 8 is a block diagram showing a structure of a fourth embodiment of the VTR of the present invention (a portion surrounded by a broken line 10) and radio waves of a television program sent from a broadcasting station. FIG. 1 is a system configuration diagram including an antenna 30 for receiving and a monitor television 20 for reproducing and viewing a VTR. The VTR 10 includes a first mechanism unit 1 and a second mechanism unit 2 which run a magnetic tape (not shown) stored in a cassette and record / reproduce a video / audio signal on / from the magnetic tape by a rotary head or a fixed head. , A reproduction signal processing unit 5 that demodulates a reproduction signal output from one of the two mechanism units 1 and 2 during a reproduction operation to output a video / audio signal, and a signal input by the antenna 30 during a recording operation. A tuner circuit for selecting a desired program or an input / switch circuit for selectively switching the video / audio signal demodulated by the tuner circuit and the video / audio signal from the reproduction signal processing section 5 and the video / audio signal are separated from each other to the magnetic tape. A recording signal processing unit 4 including a modulation circuit or the like for converting a recording signal that can be recorded upward, a first mechanism unit 1 and a second mechanism unit 2. A switch circuit 6 for switching the connection with the raw signal processing unit 5, a first mechanism unit 1, a second mechanism unit 2, a recording signal processing unit 4, a reproduction signal processing unit 5, and a switching circuit 6 are provided according to each operation mode. And a system control section 7 for controlling the operation. In the present embodiment, the output of the reproduction signal processing unit 5 is the recording signal processing unit 4
It is characterized by being input to.

In the VTR 10 configured as described above, when timer reserved recording is set for a program from 21:00 to 23:00, the system controller 7 reproduces the timer reserved recording, for example, at 21:30. The operation when the start command is input will be described with reference to the timing chart of FIG. FIG. 9 shows the operating states of the first mechanism unit 1 (denoted as mechanism 1) and the second mechanism unit 2 (denoted as mechanism 2) incorporated in the VTR 10 of FIG. There is. Where "REC"
Indicates a recording operation, “PB” means a reproducing operation, “REW” means a rewinding operation, and “FF” means a fast-forwarding operation.

At 21:00, which is the start time of timer reserved recording, the system control unit 7 activates the recording signal processing unit 4 to tune the tuner to the reserved channel and set the first mechanism unit 1 to the recording mode. The magnetic tape is run, and the recording signal of the video / audio signal from the recording signal processing unit 4 is recorded on the magnetic tape (REC in FIG. 9).
(Part (1)). If nothing is left as it is, recording is continued until 23:00. However, since the reproduction start command was input at 21:30 on the way, the system controller 7
Sets the second mechanism unit 2 to the recording mode to run the magnetic tape, and records the recording signal of the video / audio signal from the recording signal processing unit 4 on the magnetic tape (REC in FIG. 9).
At the same time as (2) portion; about 34 minutes), the recording of the first mechanism portion 1 is stopped, and then rewinding operation is performed to the tape position at the start of recording (REW (1) portion in FIG. 9). In this case, if the index signal or the time code is used to detect the tape position at the start of recording, the search can be performed at high speed.

When the rewinding to the tape position at the start of recording is completed, the switch circuit 6 is connected to the side of the first mechanism section 1 to shift the first mechanism section 1 to the reproduction mode to run the magnetic tape. The reproduction signal processing unit 5 demodulates the reproduction signal from the magnetic tape and outputs the video / audio signal to the monitor television 20 (PB (1) portion in FIG. 9). If the rewinding time takes 2 minutes, the reproduction by the first mechanism unit 1 ends at 22:02. If an index signal, a time code, or the like is used to detect the reproduction end position, it is possible to search accurately and easily.

When the reproduction end position is reached, the system control section 7 sets the first mechanism section 1 to the fast-forward mode and the recording time by the second mechanism section 2 (REC in FIG. 9).
(2) portion; about 34 minutes) is fast-forwarded by a tape length corresponding to (34 minutes) (FF (1) portion in FIG. 9), the recording mode is set, the magnetic tape is run, and the video and audio signals from the recording signal processing unit 4 Signal recording Signals are recorded on the magnetic tape (Fig. 9).
Part of REC (3); about 36 minutes). At the same time as the second
After the recording is stopped in the mechanism section 2 of, the rewinding operation is performed to the tape position at the start of recording (REW (2) in FIG. 9).
Part).

When the rewinding to the tape position at the start of recording is completed, the switch circuit 6 is connected to the side of the second mechanism section 2 to shift the second mechanism section 2 to the reproduction mode and run the magnetic tape. The reproduction signal processing unit 5 demodulates the reproduction signal from the magnetic tape to output the video / audio signal to the monitor television 20 (PB (2) portion in FIG. 9; about 34 minutes). Thereafter, similarly, the first mechanism unit 1 performs the rewinding operation (the REW (3) portion in FIG. 9) to the recording start position of the REC (3) in FIG. It is PB (3) part of 9; about 36 minutes) and ends at about 23:18. The second mechanism part 2 is 2
After the recording operation is started at around 2:40, the recording operation is ended at 23:00, which is the end time of timer reserved recording (see RE in FIG. 9).
The portion C (4); about 20 minutes), the rewinding operation (the portion REW (4) in FIG. 9) to the recording start position of REC (4) in FIG. 9 is performed. Then, when the reproduction operation of the first mechanism unit 1 (PB (3) portion of FIG. 9) is completed, the reproduction operation (PB (4) portion of FIG. 9; about 20 minutes) is started at 23:00.
It will be finished in about 8 minutes.

After that, the first mechanism section 1 rewinds the magnetic tape to the recording end position of REC (1) in FIG. 9 (the portion of REW (5) in FIG. 9), and the second mechanism section 2 The magnetic tape is rewound to the recording start position of REC (2) in FIG. 9 (the portion of REW (6) in FIG. 9).
When the rewinding operation is completed together, the system control unit 7 selects the output signal of the reproduction signal processing unit 5 as the input signal of the recording signal processing unit 4, and then the first mechanism unit 1
For the recording operation (the REC (5) portion in FIG. 9) and the second mechanism section 2 for the reproducing operation (the PB (5) portion in FIG. 9). The contents of the tape are copied onto the magnetic tape loaded in the first mechanism section 1. When the reproduction position of the second mechanism unit 2 reaches the recording end position of REC (2) in FIG. 9, both the first mechanism unit 1 and the second mechanism unit 2 are stopped. By the way, as described above, the magnetic tape loaded in the first mechanism unit 1 in advance has the REC of FIG.
Between the recording portion corresponding to (1) and the recording portion corresponding to REC (3), the RE of FIG.
Since the blank portion corresponding to the recording time corresponding to C (2) is secured by the fast-forwarding operation (FF (1) portion in FIG. 9), the magnetic tape loaded in the first mechanism portion 1 is broadcast. The recorded programs will be recorded continuously.
That is, REC (2) has the same contents as PB (5), and this PB (5) becomes REC (5) and becomes REC (5).
It is recorded (copied) between (1) and REC (3).

Next, the first mechanism unit 1 performs a fast-forward operation (FF (2) part in FIG. 9) to wind the magnetic tape to the recording end position of REC (3) in FIG. After that, the first mechanism unit 1 performs a recording operation (REC (6) portion in FIG. 9) and the second mechanism unit 2 performs a reproducing operation (P in FIG. 9).
The content of the magnetic tape loaded in the second mechanism section 2 is copied to the magnetic tape loaded in the first mechanism section 1 (B (6) portion). That is, REC
(4) has the same contents as PB (6).
Is recorded (copied) as REC (6) successively after REC (3).

As a result, all the broadcasted programs are continuously recorded on the magnetic tape loaded in the first mechanism section 1, and the first mechanism can be replayed if desired. The magnetic tape loaded in the section 1 may be normally reproduced.

(Fifth Embodiment) FIG. 10 is a block diagram showing the structure of a fifth embodiment of the VTR of the present invention (a portion surrounded by a broken line 10) and radio waves of a television program sent from a broadcasting station. FIG. 1 is a system configuration diagram including an antenna 30 for receiving and a monitor television 20 for reproducing and viewing a VTR. The VTR 10 has a first mechanism unit 1 and a second mechanism unit 2 which run a magnetic tape (not shown) stored in a cassette and record / reproduce a video / audio signal on the magnetic tape by a rotary head or a fixed head. , A reproduction signal processing unit 5 that demodulates a reproduction signal output from one of the two mechanism units 1 and 2 during a reproduction operation and outputs a video / audio signal, and a signal input from the antenna 30 during a recording operation. Recording signal processing unit 4 including a tuner circuit for selecting the program, a modulation circuit for separating the demodulated video and audio signals and converting the signals into recording signals that can be recorded on the magnetic tape, and a first mechanism. A first switch circuit 6 for switching the connection between the reproduction signal processing unit 5 and the first and second mechanism units 2, and a video / audio signal output and a recording signal of the reproduction signal processing unit 5. The second switch circuit 8 which switches between the through output of the video / audio signal recorded by the processing unit 4 and outputs it to the monitor TV 20, the first mechanism unit 1, the second mechanism unit 2, and the recording signal processing unit 4. The playback signal processing unit 5, the first switch circuit 6, and the second switch circuit 8 are configured to include a system control unit 7 for controlling each of the operation modes.

In the VTR 10 configured as described above, when timer reserved recording is set for a program from 21:00 to 23:00, the system controller 7 reproduces the timer reserved recording, for example, at 21:30. The operation when the start command is input will be described with reference to the timing chart of FIG. FIG. 11 shows the VTR of FIG.
The first mechanism section 1 (mechanism 1
2) and the operating state of the second mechanism unit 2 (denoted as mechanism 2). Here, "R
"EC" is for recording operation, "TP" is for special playback operation, and "R" is for
"EW" means a rewinding operation.

At 21:00, which is the start time of timer reserved recording, the system control unit 7 activates the recording signal processing unit 4 to tune the tuner to the reserved channel and set the first mechanism unit 1 to the recording mode. The magnetic tape is run to record the recording signal of the video / audio signal from the recording signal processing unit 4 on the magnetic tape (RE in FIG. 11).
C (1) part). If nothing remains, recording continues until 23:00, but the system controller 7 sets the second mechanism 2 to the recording mode because the reproduction start command was input at 21:30 on the way. To record the recording signal of the audiovisual signal from the recording signal processing unit 4 on the magnetic tape (REC in FIG. 11).
At the same time, the first mechanism unit 1 is stopped to record, and then rewound to the tape position at the start of recording (REW (1) part in FIG. 11). in this case,
If an index signal or a time code is used to detect the tape position at the start of recording, it is possible to search at high speed.

When the rewinding to the tape position at the start of recording is completed, the first switch circuit 6 is connected to the first mechanism section 1 side and the second switch circuit 8 is connected to the reproduction signal processing section 5 side. The first mechanism unit 1 is shifted to the special reproduction mode to run the magnetic tape, the reproduction signal from the magnetic tape is demodulated in the reproduction signal processing unit 5, and the video / audio signal is output to the monitor television 20 (see FIG. 11). TP (1)
Part). The special reproduction mode is to reproduce the magnetic tape by running it at a speed different from that at the time of recording, and particularly in this case, a tape speed equal to or lower than double speed at which audio can be reproduced is desirable. Specifically, assuming that the tape speed during special reproduction is V, reproduction is performed at a speed of V≈V ₀ · (n−1) / n. Here, V ₀ is the tape speed at the time of recording, and n is a negative integer, for example, double speed when n is −1 and 1.5 speed when n is −2. The reason why the double speed or less is selected is that the video is as close to natural as possible, and the voice processing can be converted into an easily audible sound by using the key control processing or the sound speed conversion processing by the silence detection.

Therefore, the reproduction by the first mechanism section 1 ends normally after 22:00 when it is normal reproduction, but ends at about 21:45 when it is double speed. If an index signal, a time code, or the like is used to detect the reproduction end position, it is possible to search accurately and easily.

When the reproduction end position is reached, the system control unit 7 sets the first mechanism unit 1 in the recording mode to run the magnetic tape, and records the recording signal of the video / audio signal from the recording signal processing unit 4 on the magnetic tape. Allow (R in FIG. 11
Simultaneously with the EC (3) portion, recording is stopped in the second mechanism portion 2 and then the rewinding operation is performed to the tape position at the start of recording (REW (2) portion in FIG. 11).

When the rewinding to the tape position at the start of recording is completed, the switch circuit 6 is connected to the second mechanism section 2 side to connect the second mechanism section 2 to the same as in the case of TP (1) in FIG. To the special reproduction mode, the magnetic tape is run, the reproduction signal from the magnetic tape is demodulated in the reproduction signal processing unit 5, and the video / audio signal is output to the monitor television 20.
(TP (2) part in FIG. 11).

Hereinafter, similarly, the first mechanism section 1 and the second mechanism section 1
By alternately repeating the recording operation and the rewinding special reproduction operation by the mechanism section 2 of, the recording operation time is further reduced, and when the recording operation time becomes less than the predetermined time T2, for example, 2 minutes or less, the above two mechanism sections. It is assumed that the operations of 1 and 2 are stopped, the second switch circuit 8 is connected to the recording signal processing unit 4 side, and the video / audio signal to be recorded is directly output to the monitor television. As a result, the reproduced video signal has caught up with the video / audio signal to be recorded. After that, you can watch the programs being broadcast on air. Therefore, the program found with a delay of 30 minutes will end at the broadcast end time.

[0067]

According to the video tape recorder of the first aspect of the present invention, even if the timer reserved recording is being executed, the reproduction of the recorded program is started from the beginning while continuing the recording. It can be used very conveniently. Moreover, the structure for that is relatively simple, and the cost burden can be reduced.

According to the video tape recorder of the second aspect, it is possible to perform the reproducing operation of the other magnetic tape even during the rewinding operation of one magnetic tape, and the reproducing operation at the time of rewinding seen in the first aspect. It becomes possible to play continuously without interruption of, and the usability is further improved.

According to the video tape recorder of the third aspect of the invention, the recording of the timer reservation can be continued and the reproduction of the recorded program can be started from the beginning, while the third magnetic tape is used. The program from the beginning to the end can be put together on one magnetic tape, and when it is reproduced again later, the inconvenience that the program content is divided into two can be solved and it can be used conveniently. .

According to the video tape recorder of the fourth aspect, by copying from one magnetic tape after reproduction to the other magnetic tape, the same effect as that of the third aspect can be obtained even though there are only two mechanism parts. Can be demonstrated.

According to the video tape recorder of the fifth aspect, it is possible to suppress an increase in loss time due to frequent switching of the operation of the mechanism section, and to enable reproduction as early as possible.

According to the video tape recorder of the sixth aspect, the time required for the reproduction can be shortened while the video and the sound are brought into a state close to natural by the special reproduction operation.

According to the video tape recorder of claim 7, since the reproduced video signal is made to catch up with the input video signal in time, and after that, it becomes possible to watch it on air, so that it is possible to finish watching at the broadcast end time of the program. it can.

According to the video tape recorder of the eighth aspect, the start position and the end position of the reproduction can be searched at high speed and with high accuracy, and the overall speed can be increased.

[Brief description of drawings]

FIG. 1 is a system configuration diagram using a VTR according to a first embodiment of the present invention.

FIG. 2 is an operation state transition diagram of first and second mechanism parts in the first embodiment.

FIG. 3 is a flowchart of a software program incorporated in a microcomputer which is the core of the system control unit in the first embodiment.

FIG. 4 is a system configuration diagram using a VTR according to a second embodiment of the present invention.

FIG. 5 is an operation state transition diagram of first to third mechanism parts in the second embodiment.

FIG. 6 is a system configuration diagram using a VTR according to a third embodiment of the present invention.

FIG. 7 is an operation state transition diagram of first to third mechanism parts in the third embodiment.

FIG. 8 is a system configuration diagram using a VTR according to a fourth embodiment of the present invention.

FIG. 9 is an operation state transition diagram of the first and second mechanism parts in the fourth embodiment.

FIG. 10 is a system configuration diagram using a VTR according to a fifth embodiment of the present invention.

FIG. 11 is an operation state transition diagram of the first and second mechanism parts of the fifth embodiment.

FIG. 12 is a system configuration diagram using a conventional VTR.

FIG. 13 is an operation state transition diagram of a mechanism unit in a conventional VTR.

FIG. 14 is a system configuration diagram using another conventional VTR.

[Explanation of symbols]

 1 ... First mechanism section 2 ... Second mechanism section 3 ... Third mechanism section 4 ... Recording signal processing section 5 ... Reproduction signal processing section 6 ... Switch circuit (first switch circuit) 7 ... System control section 8 ... Second switch circuit 10 ... VTR (video tape recorder) 20 ... Monitor TV 30 ... Antenna

Claims (8)

[Claims] 1. A first mechanism unit and a second mechanism unit for recording and reproducing a video / audio signal on a magnetic tape, and a video / audio signal to be recorded, which is converted into a recording signal on the magnetic tape. A recording signal processing unit for outputting to the first and second mechanism units; a reproduction signal processing unit for converting a reproduction signal from the magnetic tape into a video / audio signal;
And a switch circuit for switching the connection between the second two mechanism units and the reproduction signal processing unit, and the first and second two.
Each of the mechanism units, the recording signal processing unit, the reproduction signal processing unit, and a system control unit for controlling the switch circuit, wherein the system control unit receives a reproduction operation command during the recording operation of the first mechanism unit. After the input, means for controlling the first and second two mechanism parts so as to alternately repeat the recording operation and the rewinding reproduction operation in a cycle based on the first recording time by the first mechanism part. A video tape recorder characterized by having. 2. A first to a third mechanism section for recording / reproducing a video / audio signal on a magnetic tape, and a video / audio signal to be recorded are inputted and converted into a recording signal on the magnetic tape. A recording signal processing section for outputting to the first to third mechanism sections, a reproduction signal processing section for converting a reproduction signal from the magnetic tape into a video / audio signal, and the first to third sections. A switch circuit for switching the connection between the individual mechanism units and the reproduction signal processing unit, and controlling the first to third mechanism units, the recording signal processing unit, the reproduction signal processing unit, and the switch circuit. The system control unit includes a system control unit, and after the first operation unit receives a reproducing operation command during a recording operation, the first mechanism unit and the third mechanism unit perform a recording operation. A video tape recorder having means for controlling so that the rewinding operation and the reproducing operation are alternately repeated. 3. A first and second mechanism section for recording / reproducing a video / audio signal on a magnetic tape, a third mechanism section for recording at least a video / audio signal, and a video / audio signal to be recorded. A recording signal processing unit which is inputted and converted into a recording signal on the magnetic tape and output to the three first to third mechanism units, and a reproduction signal from the magnetic tape is converted into a video / audio signal. A reproduction signal processing unit, a switch circuit for switching connection between the first and second two mechanism units and the reproduction signal processing unit, the first to third three mechanism units, and the recording signal processing. Section, the reproduction signal processing section, and a system control section for controlling the switch circuit. The system control section inputs a reproduction operation command during the recording operation of the first and third mechanism sections. After being applied, the first and second mechanism parts alternately repeat the recording operation and the rewinding reproduction operation in a cycle based on the first recording time by the first mechanism part, and the third mechanism part. A video tape recorder characterized in that the mechanism section has means for controlling to continue the recording operation. 4. A first mechanism unit and a second mechanism unit for recording / reproducing a video / audio signal on a magnetic tape, and a video / audio signal to be recorded, which is converted into a recording signal on the magnetic tape. A recording signal processing unit for outputting to the first and second mechanism units, and a reproduction signal processing unit for converting a reproduction signal from the magnetic tape into a video / audio signal and outputting it to the recording signal processing unit. A switch circuit for switching the connection between the first and second two mechanism units and the reproduction signal processing unit; the first and second two mechanism units; the recording signal processing unit and the reproduction The system control unit includes a signal processing unit and a system control unit that controls the switch circuit, and the system control unit is configured to operate the first mechanism unit after the reproduction operation command is input during the recording operation.
And the second two mechanism units alternately perform the recording operation and the rewinding reproduction at a cycle based on the first recording time by the first mechanism section, and the fast-forward operation by the second mechanism section for the recording time. Repeatedly, the video tape recorder further comprises means for controlling to copy the recorded portion by the second mechanism portion to the fast-forward operation portion of the magnetic tape of the first mechanism portion after the reproduction is completed. .. 5. The system control unit is configured such that when a reproduction operation command is input during a recording operation of the first mechanism unit, a first recording time by the first mechanism unit is set to a first recording time.
2. When the time is less than the predetermined time, the control unit has means for controlling so that the recording time by the first mechanism section is extended until it reaches the first predetermined time.
5. The video tape recorder according to claim 4. 6. The system control unit sets the tape speed V during the reproducing operation of each mechanism unit to V≈V ₀ · (n−
1) / n (where V ₀ is the tape speed at the time of recording, n is a negative integer), and means for controlling the reproduced video / audio signal so as to temporally approach the video / audio signal to be recorded is provided. The video tape recorder according to any one of claims 1 to 5, wherein the video tape recorder is a video tape recorder. 7. The system control unit sets the tape speed V during the reproducing operation of each mechanism unit as V≈V ₀ · (n−
1) / n (where V ₀ is the tape speed during recording and n is a negative integer)
In any case, when the recording time becomes equal to or less than the second predetermined time, the recording operation is stopped, and the audio / video signal to be recorded is directly output as a reproduced video signal. The video tape recorder according to claim 6. 8. The mechanism unit records an index signal at the start and end of a recording operation and uses the index signal to detect a reproduction start position and a reproduction end position of a rewinding operation or a reproducing operation. The video tape recorder according to any one of claims 1 to 7.