JPS5929025B2 - TV synopsis Oyobi Kirokusouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses, for example, a VTR (video tape recorder) and a television receiver in combination to watch a certain broadcast program on the television receiver and record another broadcast program on the VTR. The present invention relates to a television signal receiving and recording device equipped with two channel selection devices in order to be able to record so-called alternate programs.

VT that integrates a conventional TV receiver and VTR
The R-equipped television receiver had the configuration shown in FIG. 1 or 2.

That is, these have two independent channel selection devices, each of which is supplied with a television signal received by an antenna 3 via a distributor 4.One channel selection device uses a variable capacitance diode as a tuning element. An electronically tuned tuner 1a including a high-frequency amplifier, a mixer, a local oscillator, etc., and an operating section lb consisting of a tuning switch, etc. In response to a tuning command from the operating section lb, a constant reverse bias voltage, that is, tuning, is applied to the variable capacitance diode. It consists of a channel selection control section Ic that generates a voltage. The other tuning device is similarly composed of a tuner 2a, an operating section 2b, and a tuning control section 2c. The outputs of tuners 1a and 2a are sent to video detectors 6a and 6b via video intermediate frequency amplifiers 5a and 5b, respectively. The output of the video detector 6a is supplied to the terminal al of the switch SW1, and the output of the video detector 6b is supplied to the terminals bl and V of the switch SW2.
It is supplied to the recording input terminal of the TR section □. The reproduction output of the VTR section T is supplied to the terminal b2 of the switch SW2, the output of the switch SW2 is supplied to the terminal a2 of the switch SWI, and the output of the switch SWI is supplied to the cathode ray tube via a video amplifier or the like (not shown). . The switch SWI switches between an image projected on the cathode ray tube based on the output of the tuner 1a and an image based on the playback output of the VTR section T.
The switch SW2 is switched to the terminal bl side during recording and stopping (referred to as EE mode), and is switched to the terminal b2 side during playback. In the configuration of FIG. 1, with the switch SWI connected to the al side and the switch SW2 connected to the bl side as shown in the diagram, the tuner 2
The broadcast content (counterprogram) of the other channel selected by a can be recorded by the VTR section T, for example, by subjecting the video signal to FM modulation and by using the rotating magnetic head on the magnetic tape.

I used tuner 1a with the intention of recording the opposite program in advance like this.
There is relatively no problem when determining the reception channels for Tuner 2a and Tuner 2a, but when I press the record button while watching the TV screen and want to record the contents immediately, the reception channel of Tuner 2a is different from that of Tuner 1a. When there is a mistake, a television signal of an unwanted channel is recorded. Therefore, it is necessary to always know which channel is being received by tuner 1a or tuner 2a. Also, in the configuration of FIG. 2, video detector 6a and terminal C2 of switch SW3 are connected to terminals c and C2, respectively. 6
b, and output from switch SW3 to VTR section 7.
At the same time, the output of the video detector 6a is supplied to the terminal D2 of the switch SW4, and the output of the video detector 6a is supplied to the terminal d1 of the switch SW4.The output of the switch SW4 is supplied to the terminal a1 of the switch SWl similar to that shown in FIG. The reproduced output of the TR section 7 is supplied to the TR section 7. If you do this, the switch S
With Wl, SW3, and SW4 connected as shown, it is possible to record a counterprogram. In addition, if you want to record the contents of the channel you are currently viewing, you only need to switch switch SW3 to the C1 side from the state shown in the figure.However, there is a risk of forgetting to switch switch SW3, and as with the configuration shown in 〇Figure 3 shows a conventional configuration in which the television receiver and VTR are separate units, and the VTR1O has a channel selection device, a distributor 4,
Video intermediate frequency amplifier 5b, video detector 6b, VTR section 7
, RF converter 8, switches SW2 and SW5 are provided.The RF signal is supplied from the distributor 4 to the terminal e1 of the switch SW5, and the RF signal is supplied to the terminal E2 of the switch SW5. The recording signal or the reproduction signal of the VTR unit 7 converted by the converter 8 is supplied.

The output of this switch SW5 is supplied to the channel selection device of the television receiver. If the switch SW5 is switched to the e1 side as shown in FIG. 3, it is possible to record the other program, but basically, it has the same drawback as the one shown in FIG. 1 that recording errors are likely to occur. The present invention eliminates the above-mentioned conventional drawbacks. In other words, when two tuners are provided to record counterprograms, the reception channel of each tuner is determined independently. The purpose of this invention is to prevent recording errors. The present invention will be explained below. Figure 4 shows the basic configuration of an example of the present invention.
In the figure, SW6 indicates a switch that can be switched depending on the operating state of the VTR unit 7.
It is turned off only when the R section 7 is in the recording state, and turned on in the playback state and other operating states.In addition, one of the channel selection devices is not provided with the operation section 2b, and the selection from the operation section 1b is not provided. The station command is sent to the station selection control unit 2c via the switch SW6.
If the switch SW6 is on, the tuners 1a and 2a are switched by the channel selection command from the operation unit 1b. The channels are the same.According to the configuration of this example of the present invention, if the VTR section 7 is not in the recording state while watching a broadcast on a certain channel, the tuner 2a is also in the receiving state of the same channel. Therefore, when you want to record what you are watching, you can simply put the VTR section 7 into the recording state, and there is no risk of recording errors.

In addition, to record the counter program, the operation unit 1b is used in advance so that the tuners 1a and 2a receive the channel of the counter program.
After that, the VTR section r should be put into the recording state.0 Once the recording of the subprogram is finished, the switch SW6 will be turned on.
The reception channels of tuners 1a and 2a are again the same, and there is no possibility of a recording error occurring when recording what is being viewed next. As described above, according to the present invention, it is possible to record a counter program, and it is possible to prevent recording errors when recording the content that is currently being watched.Furthermore, since the operation section 2b is not required, The operation becomes easy and the configuration can be simplified. The above-mentioned two channel selection devices and the switch SW6 have a configuration specifically shown in FIG. By selectively turning on the channel selection switches s1 to Sn, a signal of "0" is supplied to the memory 21, and only the one corresponding to the channel selection switch turned on among the n output terminals of the memory 21 becomes "1". ].

The output of the memory 21 is held until the channel selection switch is turned on again next time. The bases of M-type transistors Q, ~Qn are connected to the output terminal of this memory 21, respectively. The emitters of transistors Q1 ~ Qn are grounded, and are set in advance between the husband's collector and the power supply terminal (+Cc). The stators of the potentiometers R1 to Rn for generating the tuned voltage are inserted, and the respective sliders are connected in common through diodes to form the tuned voltage output terminal 22. Also, the output of the memory 21 is given to the band switching signal generator 23, which forms a band switching signal for switching between the high and low channels of HF and UHF. Switching signal generator 23
constitutes the channel selection control section 1c. The tuner 1a includes a UHF tuner 24U (5VHF tuner 24V), each of which is supplied with the above-mentioned tuning voltage and band switching signal.In addition, when receiving the UHF band, the VHF tuner 24U (including a 5VHF tuner 24V) is supplied.
The mixer No. 4 is configured to operate as a first-stage video intermediate frequency amplifier.Other tuning devices also have a similar tuner 2a and a tuning control section 2c, and an operation section 1b.
The outputs of the tuning switches s1 to Sn are connected to the inverters 11 to I.
NAND circuits N1~ that constitute the gate circuit 25 via n
Nn is supplied to one input terminal of each of the NAND circuits N1~
TR to the terminal 26 formed by commonly connecting the other input terminals of Nn.
This control pulse is "0" only when the VTR section 7 is in the recording state. The outputs of the NAND circuits N1 to Nn are supplied to the channel selection control section. The data is supplied to the memory 21 of 2c.

Considering only one channel selection device in the above configuration, for example, channel selection switch S2 among the channel selection switches s1 to Sn
When turned on, only the second output terminal of the memory 21 becomes "1", the transistor Q2 is turned on, and therefore the tuning voltage determined by the potentiometer R2 and the band switching signal from the band switching signal generator 23 It is now in a state where it can receive three channels of the VHF band.

Here, if the VTR section 7 is in the recording state, the control pulse from the terminal 26 is "0", so the NAND circuits N1 to N
The output of n becomes "1" regardless of the signal applied via the inverters 11 to In, the contents of the memory 21 of the channel selection control section 2c are not changed, and the gate circuit 2
5 is off 0 On the other hand, if the VTR section 7 is not in the recording state, the control pulse becomes "1" and the output of the inverter connected to the channel selection switch turned on with the operation section 1b is "1".
For example, the output of the inverter 12 becomes "1",
The output of the NAND circuit N2 becomes "0", which is supplied to the memory 21 of the channel selection control section 2c.Therefore, the tuner 2a also receives the same channel as the tuner 1a.In other words, the gate circuit 25 corresponds to the switch SW6 in FIG. 4.O FIG. 6 shows another example of the present invention, and the difference from the example in FIG. 4 is that the outputs of the video detectors 6a and 6b are connected to the terminals f1 and F2. A switch SW7 is provided to supply the output to the terminal a1 of the switch SWl, and the switch SW6
Similarly, it has terminals f1 and F2, and these switches SW6 and SW7 are changed over in connection with the recording operation of the VTR section 7 and the pause operation during recording.

That is, as shown in FIG. 7, there is a pause switch SW8 in the TR unit 7, which is connected to the terminal g1 side during the pause operation, and connected to the terminal G2 side at other times, and the terminal h1 during the recording operation.
A recording switch SW9 is connected to the terminal H2 side and otherwise connected to the terminal H2 side, and the relay power supply 11 is connected to the relay winding 12 via the terminal G2 of the pause switch SW8 and the terminal hl of the recording switch SW9. There was no such thing,
The switches SW6 and SW7 described above are configured as switches for this relay. Then, only when the recording state is in the recording state and not the pause state as shown, the relay winding 12 is energized and the switches SW6 and SW7 are connected to the terminal F2 side as shown in the diagram. state and the pause state, that is, the pause switch SW8
is connected to the terminal g1 side and/or when the recording switch SW9 is connected to the terminal H2 side, the power to the relay winding 12 is cut off and the switches SW6 and SW7
With this configuration, when the TR unit 7 is not in the recording state and you want to watch a certain channel on the TV receiver, turn the switch S, contrary to the state shown in the figure.
W6 and SW7 are connected to the terminal F side, the receiving channels of the tuners 1a and 2a are made the same by the tuning command from the tuning section 1b, and the output of the tuner 2a is connected to the video intermediate frequency amplifier 5b and the video detector. Device 6b1 switch SW7
and SWl, an image based on the output of the tuner 2a is displayed on the cathode ray tube. Therefore,
If the tuner 2a is out of tune, you can adjust the fine tuning while looking at the image to accurately tune it.
It is designed so that it can be adjusted separately. next,
VT to record the image projected on the cathode ray tube
When the recording switch SW9 is operated in the R section 7, the switches SW6 and SW7 are switched to the terminal F2 side as shown in the figure, and an image based on the output of the tuner 1a is projected on the cathode ray tube, and an image based on the output of the tuner 2a is recorded. Also, recording of a counter program can be done in the same way by first selecting the channel of the counter program using the operation section 1b.At this time, since the fine tuning of the tuner 2a is accurately set, the recording is not possible. The signal quality is good.

Then, if you cancel the recording state, switch SW6 and
7 is connected to the terminal f1 side, and the reception frequency of tuner 2a is automatically switched to the same frequency as tuner 1.〇Here, if you want to record what you are currently watching even when recording the other program, If you want to change the program to be recorded, etc.
When it becomes necessary to switch the reception channel of the tuner 2a, the pause switch SW8 can be connected to the terminal f1 side. This allows the tuner 2a to receive the desired channel using the operating section 1b, and This can be recorded, and the synchronization status at that time can be checked while looking at the screen.

As is clear from the above, according to the other example of the present invention shown in FIG. It is possible to prevent the output of the tuner 2a which is out of tune from being recorded.

In general, in electronically tuned tuners, tuning deviations often occur due to temperature changes, aging, etc., and it is highly effective to ensure that the tuner is always tuned to obtain the recorded television signal. SW
It was possible to check the recorded contents by operating each of SW2 and SW1, but the operation was troublesome. According to the configuration shown in FIG. 6, switch SW2 can be omitted and switch
Since Wl can be made to be an automatic switching type that is automatically connected to the terminal A2 side when the VTR section 7 enters the playback state,
The operability can be greatly improved0 Furthermore, by controlling the switch SW6 in relation to the pause state, it is possible to switch the reception channel of the tuner 2a even in the recording state by setting the pause state.
The present invention can also be applied to a case where the television receiver and the TR are separate devices as shown in FIG. A configuration that is provided in the tuning control section and detects a match between its output and a tuning command from the operation section, stops the counting operation of the counter upon this detection, and generates a predetermined tuning voltage determined by the output of this counter. Various configurations can be adopted.

Furthermore, tuners 1a and 2a are not limited to electronically tuned types;
A mechanical channel selection mechanism such as a turret type may be used.

[Brief explanation of the drawing]

Figures 1 to 3 are system diagrams of conventional television signal reception and recording devices, Figure 4 is a system diagram of an example of the present invention, Figure 5 is a specific configuration diagram of a part thereof, and Figure 6 7 is a system diagram of another example of the present invention, and FIG. 7 is a connection diagram of a part of the switch switching section. 01a and 2a are electronically tuned tuners, 1b and 2b are operating units, and 1c and 2c are tuning units. A control section 7 is a VTR section, and SW6 is a switch that is switched in connection with the recording operation.

Claims (1)

[Claims] 1 Equipped with a first and a second tuner, both of which are in an operating state, so that an image based on the output of the first tuner can be projected on a cathode ray tube, and the output of the second tuner can be recorded on a recording device. None, the channel selection command for switching the reception channel of the first tuner is given to the second tuner via a switch means that switches in conjunction with the recording operation of the recording device, and in one state of this switch means. The receiving channels of the first and second tuners are the same, and in other states of the switch means, the receiving channel of the first tuner can be switched and the receiving channel of the second tuner is fixed. Receiving and recording equipment.