JPS6017270B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording and playback device that combines a television receiver and a magnetic recording and playback device, etc., and allows users to watch a program (main program) on a channel on a television receiver while watching a video recording and playback device. If you are recording a program (hair program) on another channel with a tape recorder (VTR), etc., and you want to screen the main program of the channel you are currently watching, just operate the changeover switch and the VTR, etc. will automatically record it. It is an object of the present invention to provide a device capable of setting a mirror image channel to the same channel as the channel of the scheduled program of the television receiver, and also capable of setting the channel of the television receiver to a monitor channel.

First, referring to FIG. 1, the basic structure and operation of the silver painting reproduction apparatus will be explained.

In the figure, a television signal input from an antenna 1, etc. is distributed by a distributor 2, one is applied to the a terminal of an antenna selector switch 4 of a television receiver (TV) 3, and one is applied to a terminal A of an antenna selector switch 4 of a television receiver (TV) 3, and a tuner 5 is connected to a channel selection circuit. A designated channel is selected from 6, and the necessary signal processing such as signal amplification and demodulation is performed in the image receiving circuit 7, and then the cathode ray tube 8
and the image of the designated channel is displayed. The other distributed television signal is added to the tuner of the video tape recorder (VTR) 9, a designated channel is selected by the channel selection circuit 11, and the signal processing circuit 12 performs necessary signal amplification, demodulation, etc. After signal processing is completed, the signal is added to the recording/reproducing circuit 13.

The information is then recorded on a recording medium such as a magnetic tape based on an operation control command from the control circuit 14, and read out from the recording medium. The read reproduction signal is sent to the RF converter 15
is added to the monitor channel (usually 1st to 3rd
The RF carrier wave of a channel that is not broadcast in the area of use is selected from among the channels is converted into a modulated RF television signal, and is applied to the b terminal of the antenna changeover switch 4 of the TV 3. Thus, VTR9
When a desired green screen channel is selected in the channel selection circuit 11, the program on that channel can be screened in the line drawing reproducing circuit 13.

To monitor the program on the channel being recorded during this green screen, first connect the antenna cut-off switch 4 of the television 3 to the b terminal side, and use the channel selection circuit 6 to set the channel to the monitor channel. Here, if you want to watch programs on other channels on the TV 3 while leaving the line drawing channel as is, set the antenna selector switch 4 to the a terminal and tune the channel selection circuit 6.
By specifying a desired channel, you can view the program on that channel. It becomes possible to record a hair program while viewing a so-called main program. On the other hand, VTR
9, first connect the antenna changeover switch 4 of the television 3 to the b side and select the monitor channel with the channel selection circuit 6.

Here, when a playback pin (not shown) is operated in the control circuit 14 of the VTR 9, the playback operation is started and the playback image can be viewed on the television 3. In addition, if the VTR 9 has a pause function, pressing the pause button and activating a pause circuit (not shown) can pause the running of the tape during either recording or playback. It is also possible to capture still images during playback. As is clear from the above, in this type of conventional device, if you are watching, for example, a program on channel 8 on the TV 3 and want to record this program, first select the tube 10 of the VTR 9. A manual operation was required to switch to the eighth channel in the circuit 12, and then a line drawing metal 0 (not shown) had to be operated.
Moreover, if the user wanted to monitor these programs at the same time, it was necessary to manually switch the channel of the television 3 to the monitor channel. In addition, you can watch the main program on TV 3 while watching the VTR.
If you want to change the main program to be shown in green while the other program is being shown in green on TV 9, it is necessary to stop the VTR 9, change the channel on the VTR 9, start the VTR 9, and switch to the monitor channel on TV 3. This has the inconvenience of requiring cumbersome manual operations. Therefore, in view of the above-mentioned points, the present invention has been devised so that when a program on a certain channel is being received on a television and the program is to be recorded, the recording channel of the VTR etc. is automatically changed by simply operating the green screen spade of the VTR etc. You can switch to the channel of that program and switch the TV channel to the monitor channel.Furthermore, when you are watching the main program on TV and watching the back program on VTR etc., you can switch to the VTR by simply operating the switch. It is an object of the present invention to provide a convenient device that can change a mirror channel of a VTR or the like to a channel of a current program and can switch a television to a monitor channel without operating the equipment.

For this reason, in the apparatus of this embodiment, as shown in FIG. An automatic switching circuit 17 is provided for automatically switching the station circuits 6, 11 and the antenna switching switch 4 as described above.

The embodiment will be described in detail below with reference to FIGS. 1 to 4.

Here, the channel selection circuit 6 of the television 3 includes a channel switching pulse oscillation circuit (not shown), and when a channel is switched, it detects this and generates channel pulses of the same number as the number of channels switched. However, this channel pulse is generated from the output terminal PO. The channel pulse gate circuit 18 inverts this output channel pulse and supplies it to the channel up terminal UI of the channel selection circuit 11 of the VTR 9. When a channel pulse is applied to the channel up terminal UI, the channel selection circuit 11 switches the selected channel one channel at a time for each switching pulse. The monitor channel detection circuit 19 detects the monitor channel output of the terminal hm, which is at low level when the monitor channel is selected by the channel selection circuit 6 of the television 3 and is at high level when other channels are selected. The detection output is applied as a gate signal to the switching pulse gate circuit 18, and is also supplied as a control signal to the VTR channel reset circuit 2. Reference numeral 21 denotes a gate pulse generation circuit, which is connected to a terminal RO from which a recording signal is generated which is at low level when the VTR 9 is in the recording state and at low level at other times.
When R9 is switched to the recording state, a gate pulse of a predetermined length is generated and applied to the switching pulse gate circuit 18.

Further, the recording signal from the recording terminal RO is added as a control signal to the VTR channel reset circuit 20, so that the reset signal is not applied to the terminal RI during green picture.
Reference numeral 22 designates a monitor channel switching circuit, which operates when a green image in progress signal is applied from the green image terminal RO or when a switching signal described later is applied to switch the channel of TV 3 to the monitor channel at the terminal MI. This adds the signal.

Further, the VTR channel reset circuit 2 generates a reset output when the output K of the monitor channel detection circuit 19 is at a low level and the output of the recording terminal RO is at a low level. Further, the channel pulse gate circuit 18 inverts the channel pulse from the terminal PO only when the output K of the monitor channel detection circuit 19 is at a low level and the output of the gate pulse generation circuit 21 is at a high level.
is applied to the channel up terminal UI of the channel selection circuit 11. On the other hand, the gate pulse generating circuit 21 generates a gate pulse that remains at a high level for only 3 hsec from the moment the input rises from a low level to a high level. This time of 3 seconds is long enough to cover all the pulses when the number of channel pulses is the greatest. Furthermore, 23 is a switching pulse generation circuit, which first generates a VTR reset pulse when switches 1 to 6 are operated, and generates a VTR reset pulse to the channel selection circuit 11.
In addition, a gate pulse is generated and applied to the channel pulse gate circuit 18 and the monitor channel switching circuit 22. Next, the operation is shown in Figure 3.
This will be explained with reference to FIG.

Figure 3 shows the configuration of the channel selection buttons of the channel selection circuits 6 and 11 of the TV 3 and VTR 9. In the TV 3, the first channel on the left end of the upper row is the monitor channel, and the second and third channels are monitored from the right. It is set as... The VTR 9 is also configured in a similar manner.
Suppose now that the channel selection circuit 6 of the television 3 is operated to receive the third channel.

At this time, the output of the monitor channel terminal MD becomes high level, and therefore the output K of the monitor channel detection circuit 19 is. - level. On the other hand, since the output C of the recording terminal RO of the VTR 9 is also at a low level, the VTR reset circuit 20 generates a level of / and applies it to the reset terminal RI. As a result, the VTR 9 is reset to the first channel, which is the reference channel. The operation at this time is
A switch circuit (not shown) is connected in parallel to the first channel switch (not shown) of 9, and the switch circuit is closed by the output applied to the terminal RI from the VTR reset circuit 20, and the first channel is switched on. It's a good idea to tune in. In this state (point a in Figure 3), when the channel of the television 3 is switched from the 3rd channel to the 6th channel, the outputs 8 and J are both at low level and the channel pulse gate circuit 18 is closed. Even if three channel pulses like A are output to the pulse output terminal PO, they will not be applied to the channel up terminal m.

When the line drawing anchor of the VTR 9 is pressed to start the line drawing operation (point b in FIG. 3), the green drawing terminal RO rises from the low level to the high level.

This world power C includes a VTR reset circuit 20, a gate pulse generation circuit 21, and a monitor channel switching circuit 2.
Added to 2. As described above, the gate pulse generating circuit 21 generates the gate pulse E which remains at a high level for only 3 hsec. On the other hand, the monitor channel switching circuit 22 generates a monitor channel switching detection force D and terminal M
In addition to I, the channel of TV 3 is switched from channel 6 to the monitor channel. The means at this time is, for example, a monitor channel selection switch (
A switch circuit (not shown) is connected in parallel to the monitor channel switching circuit 22, and the monitor channel is selected by closing this switch circuit with the output D of the monitor channel switching circuit 22. At this time, the channel selection circuit 6 generates the same number of pulses as the number of shifted channels, that is, five continuous pulses A, at the output terminal PO by the function of the switching pulse oscillation circuit. In this case, the oscillation circuit detects each channel terminal and stops oscillation when the channel terminal is at a low level, that is, when located at the selected channel. At this time, channel pulse gate circuit 1
Since the output E is at the low level and the output K is at the low level, it is opened to invert the channel pulse and output to the VTR9.
is supplied to the channel up terminal UI. On the other hand, at this time (when pressing 0 for recording), the VTR reset circuit 2
0, one input C goes from low level to /.
It becomes possible to move from one channel to another. Therefore, the channel selection circuit 11 of the VTR 9 moves in the upward direction by five channels, and the sixth channel is selected. Note that even if you operate the channel selection circuit 6 of the TV 3 to select another channel to receive another program (point c in Figure 3) during the key image, a new message will be displayed on the screen of the TV 3. Although the program of the selected channel is displayed, the channel pulse gate circuit 18 does not open because the output E of the gate pulse generation circuit 21 is at a low level, and the channel pulse is output from the channel selection circuit 11 of the VTR 9. It is not supplied to terminal m.

That is, the VTR 9 continues recording the program on the sixth channel. In addition, when the channel of TV 3 is selected as a monitor channel and the green screen button is pressed, the output F is at a high level, and the channel pulse gate circuit 18 does not operate, and the channel pulse does not appear. Therefore, the channel selection circuit 11 of the VTR 9 maintains the same channel.

As described above, according to the present configuration, when you are watching a program on a certain channel on the TV 3 and want to record the program, you can simply press the recording button on the VTRS to transfer the VTR 9 to the TV 3.
can be set to the same channel as the
Moreover, the TV 3 can be changed to a monitor channel for the first time. That is, by simply operating the tin picture button or the lock picture button of the desired channel, the tin picture operation of the desired channel can be started and that channel can be monitored. Moreover, in this state, only the selected channel of the television 3 can be changed, the main program can be received on the television 3, and the off-program can be recorded on the VTR 9. Next, while the channel of the main program is being received on the TV 3 and the channel of the counter program is being keyed on the VTR 9 as described above, the channel of the main program can be recorded on the VTR 9 without stopping the VTR 9. The operation of switching to is explained below.

At this time, first, the changeover switch 16 is operated as usual (point d in FIG. 3). Then, the cutting pulse generation circuit 2
3, first generate VTR reset pulse 1 and reset the VTR.
In addition to terminal RI of VTR 9, the channel selection circuit 11 of VTR 9 is switched to the reference first channel. Next, a gate pulse J is generated to operate the monitor channel switching circuit 22 to generate an output ○, which is applied to the terminal MI of the television 3 to switch that channel to the monitor channel. Further, this gate pulse J is applied to the channel gate pulse circuit 18 to make it conductive, and the channel pulse generated from the terminal PO at the time of switching to the monitor channel is inverted and applied to the terminal m of the VTR 9, and the channel selection circuit 11 is connected to it. Switch to the channel of the main program that was being watched on TV 3. In this way, the VTR 9 can be switched to the channel of the previously scheduled program, and the TV 3 can be switched to the monitor channel to monitor the program being recorded. It is possible.

In addition, in conjunction with such switching, the antenna is switched so that the TV signal from the RF converter 15 of the VTR 9 is applied to the TV 3 only during the period when the channel selection circuit 6 is switched to select the monitor channel. Operation switch 4
Since it is necessary to switch the monitor channel output from the terminal MD of the TV 3, when the channel selection circuit 6 is switched to the monitor channel by the antenna switching circuit 24 and the output of the terminal MD is at a low level, the antenna A switching switch 4 is configured to switch between the b terminals.

A specific example is shown in FIG.

In the figure, transistors 18a to 18c constitute the channel pulse gate circuit 18, and the base of the transistor 18a is connected to the channel pulse output terminal PO of the channel selection circuit 6. A transistor 19a constitutes the monitor channel detection circuit 19, and its base is connected to the monitor channel output terminal MD. Furthermore, a relay 19b is inserted between the collector of the transistor 9a and the power source. Reference numeral 20a denotes a transistor constituting the VTR reset circuit 20, whose collector is connected to the reset input terminal RI of the channel selection circuit 11.

The base of the transistor 20a is connected to the normally closed terminal of the relay 19b via a backflow prevention diode, etc., and is also connected to an output terminal RO from which a predetermined voltage (12V) is output when the VTR 9 is recording. Reference numeral 21a designates a transistor constituting the gate pulse generation circuit 21, and has a base connected to a resistor and a capacitor for bias and constituting a time constant circuit.

A transistor 22 constitutes the monitor channel switching circuit 22, and has a base connected to a capacitor and a resistor constituting a time constant circuit, and a collector connected to a relay 22b.

A contact point of this relay 22b is connected in parallel to a tuning switch (not shown) for a monitor channel of the tuning circuit 6. As explained above, according to the present invention, when you are watching an arbitrary channel on TV and want to green-screen the program of this channel, you can automatically change the recording channel of the VTR etc. by simply operating the recording button of the VTR etc. can be set to that channel, and the TV channel can be used as a monitor channel, making it unnecessary to switch channels on the TV, VTR, etc. before the line drawing fishing operation, which was required in the past, which is extremely convenient in practice.

Furthermore, if you are watching a different channel on the TV while displaying a channel of a counter program on a VTR, etc., and you want to display the channel on the TV, you can switch the switch without stopping the VTR, etc. This provides a convenient device that can be switched with a single operation.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a recording/playback device according to an embodiment of the present invention, Fig. 2 is a front view of main parts of the device, Fig. 3 is a time chart for explaining the operation, and Fig. 4 is a concrete configuration. FIG. 3...Television receiver (TV), 4...
...Antenna selection switch, 5...Tuner,
6...Tuning selection circuit, 7...Picture receiving circuit, 8
...Cathode ray tube, 9...Video tape recorder (VTR), 10. ．．・．．・．． Tuner, 11・
...Tune selection circuit, 12...Signal processing turn key,
13... Line drawing reproduction circuit, 14... Control circuit, 15... RF converter, 16...
...Switch, 17...Automatic switching circuit, 18...
... Channel pulse gate circuit, 19 ... Monitor channel detection circuit, 20 ... VTR reset circuit, 21 ... Gate pulse generation circuit, 22
...Monitor channel switching circuit, 23...
...Kirifusuma pulse generation circuit, 24...Antenna switching circuit. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A television receiver equipped with a channel selection circuit for selecting a tuner and its selected channel, a recording and reproducing means such as a video tape recorder equipped with a channel selection circuit for selecting a tuner and its selected channel, and both of the above selections. and an automatic switching circuit for controlling a station circuit, wherein the automatic switching circuit is configured to select a channel of a main program in the television receiver and record a channel of a counter program with the recording/playback means. A state in which the channel of the scheduled program selected by the channel selection circuit of the television receiver is transferred to the channel selection circuit of the recording/playback means to record the channel of the scheduled program by the operation of the operated changeover switch. 1. A recording and reproducing device, characterized in that the channel selection circuit of the television receiver is switched to the channel selection state of a monitor channel.