JPH0338793B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A home VTR is generally used in combination with a television receiver.

That is, in FIG. 1, 1 is a VTR, 2 is its main circuit, and 4 is a television receiver. When the television receiver 4 receives general broadcasting, the received signal from the antenna 5 is supplied to the receiver 4 through the switch 3.

Furthermore, when the VTR 1 is played back, the video signal and the audio signal are played back in the main body circuit 2, and at the same time,
If these signals are empty channels, 2 if they are in the Kanto area.
The channel is converted into a television signal, and this television signal is supplied to a receiver 4 through a switch 3.

Note that when recording on the VTR 1, the received signal from the antenna 5 is supplied to the VTR 1, and the
A television signal from 1 is supplied to a switch 3 so that it can be monitored as needed.

Therefore, in such a combination,
When VTR 1 has finished playing and you want to continue watching the broadcast, () switch receiver 4 from channel 2 to the broadcast channel () turn off the power switch of VTR 1 (at this time, switch 3 will generally automatically turn antenna 5 on). operation (switching to the side) is required.

The order of the operations in () and () may be reversed, but if only the operations in () are performed, the screen will be unsightly because the antenna 5 will not be connected to the receiver 4. When only operating, receiver 2 remains on channel 2 with no broadcast, so noise is played from the speaker,
It becomes extremely uncomfortable. In other words, when you stop playing VTR1 and watch the broadcast, (), ()
The operations in the sections must be performed in pairs.

When performing the operations in () and () using the remote control (remote control), perform the operations in () using the TV commander (remote control transmitter) 7.
The operation described in () must be performed using VTR command 6, which can make the operation complicated or lead to mistakes.

This invention attempts to solve these problems.

Let's explain one example below.

2 and 3 show an example of the commander according to the present invention, with FIG. 2 being a circuit diagram thereof and FIG. 3 being a plan view thereof. In this commander, S _V indicates a normally open switch for remote control operation of VTR 1. Of the switches S _V , for example, switch S _P is a switch for setting VTR 1 to playback mode, and switch S _c is a switch for receiving VTR 1. The switch for changing channels, switch _PV , is
This is a switch for turning on and off the power of VTR1. Also, S _T indicates a normally open switch for remote control operation of the receiver 4, switch S _r is a switch for changing the reception channel of _the receiver 4, and S _S is a switch for changing the volume. The switch P _T is a switch for turning on and off the power of the receiver 4. And these switches
S _V and _ST are connected to the key encoder 10.

This encoder 10 is composed of a so-called 1-chip microcomputer, in which 11 is a 4-bit parallel processing CPU, and 12 is programmed with programs for the key encoder and remote control.
ROM, 13 is RAM for work area, 14 is 8-bit output port for key scan, 15 is 8-bit input port for key input, 16 is 1-bit input port for key input detection, 17 is command signal It is a 1-bit output port for output,
These circuits 11 to 17 are integrated into a single chip IC. Then, switch for ports 14 and 15.
S _V and S _T are connected in a matrix, and
A pull-down resistor R is connected to the port 15 and the OR circuit 19.

The outputs A ₀ to _{A 7} of port 14 are normally sent to CPU 11 according to the program in ROM 12.
It is set to "all 1" by. Also,
At this time, the input of the OR circuit 19 is pulled down by the resistor R and is "all 0", so its OR output E _S is "0", but this signal E _S is supplied to the CPU 11 through the port 16, and this E _S =
The state of "0" is checked.

However, when either switch S _i of switches S _V or _ST is turned on, the outputs A ₀ to A ₇ of port 14 are “all 1”, so
One of the inputs of the OR circuit 19 is “1” in response to S _i
, and E _S = “1”. Then this is the CPU
11, and the CPU 11 outputs a dynamic scan pulse to the port 14 according to the program in the ROM 12. Therefore,
Among the inputs B ₀ to _{B 7} of the port 15, the input B _i to which the turned-on switch S _i is connected becomes "1" at the timing of the dynamic scan pulse of the port 14.

Then, the input of this port 15 is read by the CPU 11 and it is determined which switch is turned on. Based on the result of this determination, a command signal E switch S _c is formed, and this is sent to port 17.
is output from.

This command signal E _c is, for example,
(C and D in the figure are shown with compressed time axes). That is, the signal E _c has a cueing guide signal with a constant pulse width and a 12-bit code signal, and the code signal has a wide pulse width when it is "1" and a "0" signal. It is a PWM signal whose pulse width is wide when it is "0" and narrow when it is "0", and this code signal "1" and "0" correspond to the switch S _V and _ST that is turned on. The combination is changed. and,
When switches S _V and S _T are turned on, Fig. 4 C
As shown in , a command signal E _C having the same code signal is repeatedly generated during its on period.

Then, this command signal E _c is supplied to the PNM modulation circuit 21 as a modulation input, and as shown in FIG.
This signal Em is output to the output amplifier 22.
The light is supplied to the infrared light emitting diode 23 through the infrared light emitting diode 23.

Therefore, when switches S _V and S _T are turned on, the command signal E _c corresponding to the turned-on switch is
is transmitted as infrared light from the light emitting diode 23, so the VTR 1 and the receiver 4 can be freely operated with a remote control using the switches S _V and _ST . In addition, to turn on and off the power of VTR 1 and receiver 4,
The on or off state is reversed with each operation.

However, with only the above configuration, when you watch a broadcast after VTR1 has finished playing, it will still be (),
The operations in () are required.

Therefore, in the commander according to this invention,
The program in the ROM 12 is, for example, a flowchart as shown in FIG. In other words, 101 performs a dynamic scan on the switches S _V and _{ST when either of the switches S V or S T is operated} and E _S = “1” as described above. This is a step to read which switch was operated.

Then, in step 101, the switch S _V ,
_When either _S
It is determined whether or not the switch S _r is on, the process of the CPU 11 proceeds to step 103 , and when the switch S _r is not on, the process proceeds to step 111 .

Now, if you are watching a broadcast on receiver 4 and change the channel using the remote control, the steps
The switch operated in 101 is switch S _r
Therefore, the processing of the CPU 11 moves to step 103.

Then, in step 103, a command signal E _c corresponding to the switch S _r is generated, and infrared light corresponding to the signal E _c is transmitted as described above. Therefore, from this point on, the receiver 4 enters the reception state of the channel specified in step 101.

Processing then proceeds to step 104 where
The data of the channel selected by 103 is
The data is written to a predetermined address in the RAM 13, and then the process returns to step 101 to wait for key input again.

Therefore, through the routines of steps 101 to 104, channels of the receiver 4 can be freely remote controlled, and the channel being received at that time is stored in the RAM.
It is stored in 13.

On the other hand, when a switch other than switch S _r is operated in step 101, the processing of the CPU 11 moves from step 102 to step 111. In step 111, the switch operated in step 101 turns off the power to the VTR 1. It is determined whether the switch to be turned off is S _V , and the switch is turned off.
When P _V , proceed to step 112 and switch S _V
If not, proceed to step 121.

Then, when the switch operated in step 101 is switch _PV , that is, the process starts at step 101.
Proceeding to step 112, the channel data written in the RAM 13 in step 104 is read out, and then in step 113 a command signal E _c corresponding to the read data is formed, and this is Then, in step 114, a command signal E _C for turning off the power of the VTR 1 is generated and transmitted as infrared light. Therefore, at the time of kneading, the receiver 4 is switched to the latest channel stored in the RAM 13 (corresponding to item () above), and the power to VTR 1 is turned off (corresponding to item () above). ).

In other words, when you operate switch P _V , VTR1
When the power is turned off, the channel that was being selected by the receiver 4 until the VTR 1 started playing is selected again.

Then, the process of the CPU 11 returns to step 101 and waits for the next key input.

Furthermore, when the switch operated in step 101 is not switch S _r and switch _PV , the processing of the CPU 11 moves from step 111 to step 121. A command signal E _c corresponding to the switch is generated and transmitted as infrared light.

Therefore, the VTR 1 or receiver 4 performs step 101.
Switches operated by (excluding switches S _r and _PV )
The operating state corresponds to And CPU11
The process returns to step 101 and waits for key input again.

In this case, when the switch operated in step 101 is the switch _SP which sets the VTR 1 to playback mode, the following processing is performed in step 121. i.e. step 121
, a command signal E _c is also formed, but this signal E c is a signal E _c as shown in FIG.
It is a composite command signal that has E ₁ , E ₂ , and E ₃ in sequence.

Here, each of the signals E ₁ to _{E 3} is as shown in FIG.
_The first signal _E1 has the same format as the signal _Ec shown in FIG. This is a command signal to switch 4 to 2 channels, and the third signal
_E3 is a command signal for switching the switch 3 of the VTR 1 to the VTR side.

Then, when you operate switch _SP ,
Command signal E _c with signals E ₁ to E ₃ at 121
is formed, and infrared light corresponding to this signal E _c is transmitted. Therefore, VTR1 that received this infrared light
In the receiver 4, the command signal E _c is demodulated, and the signals E ₁ to _{E 3} contained in this signal E _c put the VTR 1 in the playback mode, and the switch 3 is turned on.
The receiver 4 is connected to the VTR side and has two channels, so that the receiver 4 can receive reproduced images from the VTR 1.

As described above, according to the present invention, when the commander's switch _PV is operated, the power to the VTR 1 is turned off, and the channel that was being viewed on the receiver 4 before playback of the VTR 1 is selected again. So,
In other words, the user only needs to press the switch _PV once, making the operation extremely simple. Moreover, since the user only needs to purchase the commanders shown in FIGS. 2 and 3 in place of the conventional commanders 6 and 7, the burden on the user is small. Also, VTR
1 and the receiver 4 do not require special adapters or modifications.

Also, from the manufacturer's perspective, Commander 6
It is only necessary to combine the commanders 6 and 7 and to change a part of the program in the ROM 12. In particular, since most of the configuration is common to the commanders 6 and 7, it is simple and can be provided at low cost.

Note that there is a receiver 4 as shown in FIG. 7 or FIG. 8. That is, the receiver 4 is
A tuner section 4A that includes everything from an antenna input circuit to a video detection circuit and an audio detection circuit, and a monitor section 4B that includes a picture tube and a speaker from its rear stage.
are considered to be separate entities. And Chuyuna part 4A
, 8 is its main circuit, and this main circuit 8
The video and audio signals are taken out from the VTR 1 and supplied to the switches 9V and 9S, and the video and audio signals from the VTR 1 are taken out as line outputs without being converted to television signals and are sent to the switches 9V and 9S.
9S, and the switch output is sent to the monitor section 4.
B is supplied.

In the receiver 4 shown in FIG. 7, the signal received by the antenna 5 is distributed to the VTR 1 and the tuner section 4A, and in the receiver 4 shown in FIG. It is supplied to section 4A.

Therefore, in the case of these receivers 4, a step for forming and transmitting a command signal _Ec for switching the switches 9V and 9S to the main circuit 8 side may be added to steps 113 and 114 in FIG. or,
When VTR1 power is turned off, VTR1
The switches 9V and 9S may also be switched via a wired connection.

In addition, in the above, when the switch _PV is operated, the power of VTR1 is turned off, and
This is a case where the channel that was being watched on receiver 4 before playing back VTR 1 is selected again.
A command signal E _c for turning off the power of the receiver 1 and a command signal E _c for turning off the power of the receiver 4 may be generated and transmitted. Alternatively, the command signal E _c for turning off the power of the VTR 1 and the command signal E _c for selecting a specific channel may be used.

Furthermore, instead of switching the receiver 4 to a broadcast channel, muting of the video signal and the audio signal may be performed.

[Brief explanation of the drawing]

1 and 4 to 8 are diagrams for explaining this invention, FIG. 2 is a system diagram of an example of this invention, and FIG. 3 is a plan view thereof. 10 is a key encoder, and 21 is a PNM modulation circuit.

Claims (1)

[Claims] 1. A remote control device that controls a VTR and a television receiver to which a reproduction output signal of the VTR and a television broadcast signal are selectively supplied, the remote control device controlling a VTR to turn off the power of the VTR. a first control switch for causing the television receiver to receive the television broadcast signal; and first and second control switches corresponding to the operations of the first and second control switches. an encoder that respectively forms two command signals; and an encoder that generates the first and second command signals to the VTR.
and transmitting means for transmitting the signal to the television receiver, and transmitting the first command signal to the VTR in response to operation of the first control switch.
A remote control device characterized in that when turning off the power of a VTR, the second command signal is transmitted to the television receiver, and the television receiver receives the television broadcast signal. 2. A remote control device that controls a VTR and a television receiver to which the reproduction output signal of the VTR and the television broadcast signal are alternatively supplied, the first remote control device being used to turn off the power of the VTR. a second control switch for inactivating the television receiver, and forming first and second command signals corresponding to the operations of the first and second control switches, respectively. an encoder, and transmits the first and second command signals to the VTR.
and transmitting means for transmitting the signal to the television receiver, and transmitting the first command signal to the VTR in response to operation of the first control switch.
A remote control device characterized in that, when powering off a VTR, the second command signal is transmitted to the television receiver to put the television receiver into a non-operating state.