JPH07107399A - Equipment connecting communication with video equipment - Google Patents

Abstract

PURPOSE:To provide a communication connecting device capable of automatically setting the state of a video equipment to be a state appropriate for receiving a video signal sent by way of a communication line. CONSTITUTION:When a call with the video signal incomes by way of the communication line, a video signal for a test from a generation part 4 is provided for the video equipment by way of a video output terminal 6. A video signal presence/absence detection part 12 detects the presence/absence of the video signal from the video equipment, which is inputted by way of a video input terminal 7. A video signal coincidence detection part 13 detects whether the video signal for a test from the generation part 4 and the video signal from the video input terminal 7 are the same or not. An operation state discrimination part 15 discriminates the operation state of the video equipment from the detection outputs of the video signal presence/absence detection part 12 and the video signal coincidence detection part 13. A control part 16 makes a remote control signal generated from a remote control transmission part to the video equipment based on the discrimination output of the operation state discrimination part and sets the state of the video equipment to be capable of properly receiving the video signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a television receiver and a VT.
Provided between a video device such as R and a communication line such as a telephone line to control the video device so that a video signal sent through the communication line can be surely input to the video device. The present invention relates to a communication connection device with a video device, which is capable of performing.

[0002]

2. Description of the Related Art Image information is transmitted through a telephone line such as ISDN. In this case, the receiving side of this image information displays the image on a television receiver, for example. , VTR may record the image information.

Upon reception of this image information, the video equipment such as a television receiver and a VTR needs to be turned on at the time of the incoming call if the power is not turned on. The input is switched so that the image information sent via the telephone line is displayed on the cathode ray tube in the case of a television receiver and becomes the recording source in the case of a VTR while the power is on. Need to take control.

Conventionally, the operation of turning on the power or switching the input is performed by the user when an incoming call accompanied by a video signal is received via a telephone line.

[0005]

However, as described above, when the user operates the power switch when receiving a call,
The operation of switching the input is complicated, and if it is a little, there is a risk that the received video signal may be missed.

Therefore, as one of the functions of the audiovisual system systematically combined with a VTR, a television receiver, an AV selector, etc., when an incoming call accompanied by a video signal is made through a telephone line, it is automatically set to the TV. It is conceivable to provide a function of displaying on the screen of the receiver or recording on the VTR. However, this is not versatile, and there is a drawback in that an audiovisual system having that function must be newly installed.

According to the present invention, the power-on control and the input switching control of the video device are automatically performed when an incoming call accompanied by the video signal is made by simply connecting the existing video device as an adapter. It is an object of the present invention to provide a communication connection device according to the above.

[0008]

In order to solve the above-mentioned problems, a communication connection device with a video device according to the present invention has a first video input to which a video signal transmitted via a communication line is input. The terminal 1, the test video signal generator 4, and the first
The switch circuit 3 for switching the video signal from the video input terminal 1 and the test video signal from the test video signal generator 4 and the output signal from the switch circuit 3 are supplied to the video input terminal of the video device. A video output terminal 6 connected to the video output terminal, a second video input terminal 7 connected to a video output terminal of a video device, and a video signal presence / absence for detecting the presence / absence of an input video signal to the second video input terminal 7. Video signal coincidence detection unit 13 for determining whether the detection unit 12, the test video signal from the test video signal generation unit 4, and the video signal from the second video input terminal 7 are the same. And the detection output of the video signal presence / absence detection unit 12 and the video signal coincidence detection unit 1
An operation state determination unit 15 that determines the operation state of the video device from the detection output of 3, a remote control transmission unit 19 that transmits a remote control signal to the video device, and a communication interface unit 17 that interfaces with a communication line. In addition to receiving the control signal from the communication interface section 17, and receiving the discrimination output of the operation state discriminating section 15,
A control unit 16 for controlling the switch circuit 3 and the remote control transmission unit 19 is provided.

[0009]

In the structure of the present invention described above, when there is an incoming call accompanied by a video signal via the communication line, the control unit 16
Switches the switch circuit 3 to the side for selecting the test video signal, and based on the discrimination output of the operation state discrimination unit,
An appropriate remote control command is generated for the video equipment from the remote control transmission unit to control power-on of the video equipment and video input switching control.

That is, when there is an incoming call from the outside,
The control unit 16 switches the switch circuit 3 to the test video signal generation unit 4 side, and the test video signal is supplied to the video input terminal of the video equipment via the video output terminal 6. If the video equipment is powered on in this state, some video signal is generated at the video output terminal. Therefore, the second video input of the device of the present invention connected to the video output terminal of the video equipment. The video signal appears at the terminal 7.

On the other hand, the video signal does not appear on the second video input terminal 7 unless the power of the video equipment is turned on. Therefore, since the video signal presence / absence detection unit 12 detects the presence / absence of a video signal at this time, the operation state determination unit 15 determines from the detection output whether the video equipment is powered on. In response to this determination result, the control unit 16 issues a command to the remote control transmission unit 19 to generate a command to turn on the power if the video equipment is not turned on. As a result, the remote control transmitter 19
Generates a power-on command to the video equipment, and the video equipment is powered on.

As a result, the video signal presence / absence detection circuit detects the video signal and confirms that the power is turned on. However, in this state, for example, when the video equipment is a television receiver,
It cannot be checked whether or not an image based on the video signal supplied to the video input terminal is displayed on the screen.

Here, for example, when the video equipment is a television receiver, the video signal of the image displayed on the cathode ray tube is supplied to this video output terminal, and VT
In the case of R, if the video signal to be recorded is led to this video output terminal, the video signal supplied to the target portion of the video equipment is supplied to the video input terminal 7 of the device of the present invention. Will be entered.

At the time of an incoming call, the control circuit 16 controls the switch circuit 3 to supply the video signal from the test video signal generator 4 to the video equipment. If it is in an appropriate state, the test video signal will return from the target part of the video equipment to the video input terminal. The video signal coincidence detection unit 13 detects the coincidence between the signal sent to the video equipment and the signal returned from the video equipment. If the input switching state of the video equipment is appropriate, the two match. If the input switching state is another state, the two do not match. In the case of disagreement, the operation state determination unit 15 receives the coincidence detection output, and the operation state determination unit 15 detects it, and the control unit 16 generates a command signal to bring the video equipment into an appropriate video input switching state. , And controls the remote control transmitter 19.

As described above, the image information sent through the communication line can be automatically displayed on the screen of the television receiver or automatically recorded by the VTR.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a communication control device with a video equipment according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a communication connection device according to the present invention. This communication connection device is connected between a communication line such as a telephone line and a video device.

In FIG. 1, reference numeral 1 is an input terminal for a video signal sent via a communication line. The video signal from the input terminal 1 is supplied to one input terminal of the switch circuit 3 via the buffer amplifier 2.

A test video signal generator 4 is also provided. The test video signal generator 4 generates a test video signal in the form of an NTSC standard television signal in the case of Japan or the United States, for example. The video signal from the test video signal generator 4 is supplied to the switch circuit 3
Is supplied to the other input terminal of the. The video signal obtained at the output of the switch circuit 3 is supplied to the video output terminal 6 connected to the video input terminal of the video equipment via the buffer amplifier 5.

Reference numeral 7 is a video input terminal connected to the video output terminal of the video equipment. The video signal obtained at the video input terminal 7 is supplied to the video output terminal 10 via the buffer amplifiers 8 and 9. The video signal obtained at the video output terminal 10 is sent to the other party via the communication line.

The output video signal of the buffer amplifier 8 is also supplied to the sync separation circuit 11. In this sync separation circuit 11, the vertical sync signal is separated from the input video signal,
It is supplied to the video signal presence / absence detection unit 12 and the video signal coincidence detection unit 13. Further, the test video signal from the test video signal generator 4 is supplied to the sync signal separation circuit 14 to separate the vertical sync signal, and the vertical sync signal is supplied to the video signal coincidence detector 13. .

The video signal presence / absence detecting section 12 detects the presence / absence of a video signal by detecting the presence / absence of a vertical synchronizing signal. Further, the video signal coincidence detection unit 13 compares the vertical synchronization signal of the input video signal from the synchronization signal separation unit 11 with the vertical synchronization signal of the test video signal from the synchronization signal separation unit 14, and the phases of both are compared. By detecting whether they match, it is detected whether both video signals match.

The detection outputs of the video signal presence / absence detection unit 12 and the video signal coincidence detection unit 13 are supplied to the operation state determination unit 15. The operation state determination unit 15 determines the operation state of the video equipment to which this apparatus is connected from the detection outputs of the detection units 12 and 13 as described later. Then, the discrimination output is supplied to the control unit 16.

An incoming call detection signal from the communication line interface section 17 and a control signal such as an incoming call accompanied by a video signal are sent to the control section 16. The communication line interface unit 17 is connected to the communication line via the terminal 18.

Reference numeral 19 denotes an infrared remote control transmission unit, and the control unit 16 controls the remote control transmission unit so that infrared output is generated from the infrared generation unit 20 to the video equipment. The control unit 16 also controls switching of the switch circuit 3.

FIG. 2 shows a connection mode between the apparatus 30 and the video equipment 40 of this example having the configuration of FIG.

In this example, the video equipment 40 is a television receiver, and includes a cathode ray tube 50, a tuner 41, a video detection circuit 42, a video amplification circuit 43, an input video signal switching circuit 44, and an infrared remote control reception. Part 45,
A remote control decoder 46 that decodes the remote control command received by the remote control receiving unit 45 and a control unit 47 that receives the output of the remote control decoder 46 and generates a control signal for each unit are provided. Further, in the television receiver 40, 48 is a video input terminal and 49 is a video output terminal.

Further, 51 is a power supply circuit, which is connected to a commercial power supply through a main power supply switch 52. In use, the main power switch 52 is generally always turned on. 53
Is a sub power switch, and when the sub power switch 53 is turned on, power is supplied to each main part. Sub power switch 5
3 is on / off controlled by a control signal from the control unit 47 according to the remote control command received by the remote control receiving unit 45.

In the television receiver 40, the NTSC television broadcast wave signal received by the antenna is supplied to the tuner 41. The output signal of the tuner 41 is supplied to the video detection circuit 42 and detected, and a video signal is obtained from this. This video signal is supplied to one input terminal of the switch circuit 44. The video signal input to the video input terminal 48 is supplied to the other input terminal of the switch circuit 44. Then, this switch circuit 44
Are switched by a switching control signal from the control unit 47. The output signal of the switch circuit 44 is supplied to the cathode ray tube 41 via the video amplifier circuit 43 and is also led to the video output terminal 49.

The video output terminal 6 of the communication connection device 30 of this example having the configuration of FIG. 1 is the video input terminal 4 of the television receiver 40.
8 is connected. Further, the video input terminal 7 of the communication connection device 30 is connected to the video output terminal 49 of the television receiver 40. Further, the infrared transmission unit 20 includes a remote control reception unit 4
5, an infrared remote control signal is transmitted. In addition, the remote control command of the infrared remote control transmitter 20 is once transmitted to the remote controller transmitter / receiver for relay,
The relay remote control transmission / reception unit may transmit the remote control command to the remote control reception unit 45.

Although the remote control command may vary depending on the manufacturer of the video equipment, the remote control transmission section 19
By setting each manufacturer, it is possible to deal with the difference between manufacturers. The remote control transmitter / receiver for relay may be adapted to the difference between manufacturers.

In the configuration of FIG. 2, the television receiver 40
The video signal displayed on the cathode ray tube 50 is derived from the video output terminal 49 when the power is turned on.

Next, with reference to the flow chart of FIG. 3, the operation when an incoming call accompanied by a video signal is on the communication line will be described.

That is, the control unit 16 of the apparatus 30 of this example
In step 101, the communication line interface unit 17
The signal from is monitored to determine whether there is an incoming call through the communication line. When it is determined in step 101 that there is an incoming call, the process proceeds to step 102 and whether the incoming call is accompanied by a video signal, for example, in the case of ISDN,
Determine from the incoming message.

If the result of determination in step 102 is that there is no incoming call accompanied by a video signal, the routine proceeds to step 103, where it shifts to the normal incoming call flowchart.

On the other hand, when the incoming call is accompanied by a video signal, the process proceeds from step 102 to step 104, the detected output of the video signal presence / absence detecting section 12 is discriminated by the operating state discriminating section 15, and the television receiver 40 is detected. It is determined whether or not a video signal is output from. That is, this corresponds to determining whether the television receiver 40 is powered on.

In the operating state discrimination section 15, the television receiver 40
If it is determined that the power of the power source is not turned on, the process proceeds from step 104 to step 105, and the control unit 16 controls the remote control transmission unit 19 to transmit the power on command to the television receiver 40. Command. After step 105, the process returns to step 104.

By this remote control, the television receiver 4
In 0, the remote control receiving unit 45 receives the command, the decoder 46 decodes it, and the control unit 47 controls the sub power switch 53 to turn on the power. As a result,
At the video output terminal 49, the video signal displayed on the CRT 41 at that time appears. Therefore, the video signal presence / absence detection unit 12 detects the video signal, confirms that the power is turned on, and the operation state determination unit 15 determines that the power is turned on.

Therefore, as a result, in step 104,
Since it is detected that the video signal is output from the television receiver 40, the process proceeds from step 104 to step 106. In step 106, the control unit 16 switches the switch circuit 3 to the test video signal generation unit 4 side,
The test video signal is input to the television receiver 40 via the video output terminal 6 and the video input terminal 48. After step 106, the process proceeds to step 107, where the video signal coincidence detection unit 13 detects the vertical synchronization signal of the test video signal,
At that time, the phases of the vertical synchronizing signals of the video signals from the television receiver 40 obtained at the video input terminal 7 are compared, and it is detected whether or not they match.

As a result of the detection by the video signal coincidence detection section 13, when the phase of the vertical synchronization signal from the synchronization signal separation section 14 and the phase of the vertical synchronization signal from the synchronization signal separation section 11 do not match, Proceeding from step 107 to step 108, the operation state determination unit 15 determines that the changeover switch circuit 44 in the television receiver 40 is not switched to the video input terminal 48 side.

Upon receipt of this determination result, the control unit 1
Reference numeral 6 controls the remote control transmission unit 19, and the switch circuit 44
Is controlled to generate an input switching command for switching to the external input terminal 48 side. As a result, the control unit 47 of the television receiver 40 switches the switch circuit 44 to the video input terminal 48 side.

After step 108, the process returns to step 107. In step 107, the synchronization signal separation units 11 and 1
When the video signal coincidence detecting unit 13 detects that the vertical synchronizing signals from the four signals coincide with each other, the steps 107 to 109 are performed.
Proceed to. In step 109, it happens that the vertical synchronizing signal of the test video signal and the CRT 41 of the television receiver 40 displayed up to that point are displayed. In the case of this example,
An operation is performed to eliminate the case where the phase of the received video signal of the tuner 42 and the vertical synchronizing signal match.

That is, the control unit 16 includes the reset unit 21.
Is controlled to shift the phase of the vertical synchronizing signal of the test video signal from the test video signal generator 4 by, for example, 1/2 vertical synchronizing period. Then, after step 109, the process proceeds to step 110, the vertical synchronizing signals from the synchronizing signal separating units 11 and 14 are compared, and the coincidence between the test video signal and the input video signal is detected again,
It is again determined whether the input switching state of the television receiver 40 is appropriate.

Even if the phase of the vertical synchronizing signal of the test video signal is shifted by the reset unit 21, the television receiver 40
Input selector switch circuit 44 of the video input terminal 48
If properly switched to the side, the video signal coincidence detection unit 13 detects that the vertical synchronizing signals of the test video signal and the input video signal are coincident with each other.

In step 110, when it is detected that the test video signal and the input video signal do not match,
If it is determined that the input switching is not appropriate, step 108
Then, as in the above, the remote controller command for input switching is generated from the remote controller transmitting unit 19, and if it is determined that they match, the process proceeds to step 111.

In step 111, the sync signal separation unit 11
Since the video signal coincidence detection unit 13 detects the coincidence of the vertical synchronization signals from the signals No. 14 and No. 14, the operation state discrimination unit 15 discriminates that the input switching in the television receiver 40 is completed. The control unit 16 controls the operation state determination unit 15
In response to the discrimination output from, the switch circuit 3 is switched to the buffer amplifier 2 side (step 112).

As a result, the video signal sent through the communication line is turned on, the input is appropriately switched, and the signal input to the video input terminal 48 is sent to the cathode ray tube 41. It is input to the television receiver 40 in the state of being supplied.

Therefore, according to this communication connection device 30, when an incoming call accompanied by a video signal is received, the power of the video device is automatically turned on so that the input is switched. In the case of a receiver, a video signal will be displayed on the screen.

In the case where the video equipment is a VTR, if the power is not turned on, the power is turned on, then the video input is switched, and the video signal to be recorded is output from the output terminal 6.
Is switched to the signal from. Then, by the remote-controlled recording command sent from the other party thereafter, this VTR is started to record. This recording command will be sent from the remote control transmitter 19 as in the case described above.

[0050]

As described above, according to the present invention, by connecting the communication connection device according to the present invention between the video equipment and the communication line, an incoming call accompanied by a video signal can be performed.
It will automatically be properly input to the target video equipment. That is, the power supply and the video input of the video equipment are automatically switched by the device of the present invention, and the video signal supplied through the communication line is set to be able to be received. Therefore, the user does not have to perform complicated remote control operation by himself,
It is very convenient.

When the video equipment is a VTR or the like,
It is also possible to remotely control recording and the like, and in that case, the video signal sent via the communication line can be surely a recording signal, resulting in a recording error. Without fail, it is possible to reliably perform operations such as recording.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a communication connection device according to the present invention.

FIG. 2 is a diagram showing an example connection relationship when the communication connection device according to the present invention is connected to a video device.

FIG. 3 is a flow chart for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

 1 First video input terminal 3 Switch circuit 4 Test video signal generation unit 6 Video output terminal 7 Second video input terminal 12 Video signal presence / absence detection unit 13 Video signal coincidence detection unit 15 Operating state determination unit 16 Control unit 17 Communication Line interface unit 19 Remote control transmission unit 30 Communication control device 40 Video equipment (TV receiver) 44 Video equipment input selector switch circuit 48 Video equipment video input terminal 49 Video equipment video output terminal 53 Video equipment sub power switch

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kenji Miikeda 6-10-13 Nakanobu, Shinagawa-ku, Tokyo Daiko Denki Seisakusho Co., Ltd.

Claims (1)

[Claims] 1. A first video input terminal to which a video signal sent via a communication line is input, a test video signal generator, a video signal from the first video input terminal, and A switch circuit that switches between the test video signal from the test video signal generator, a video output terminal that is supplied with the output signal from this switch circuit and is connected to the video input terminal of the video equipment, and the video of the video equipment A second video input terminal connected to the output terminal, a video signal presence / absence detection unit for detecting the presence / absence of an input video signal to the second video input terminal, and a test video from the test video signal generation unit. A signal and a video signal from the second video input terminal, the video signal coincidence detection unit for determining whether or not the same, the detection output of the video signal presence detection unit, the video signal coincidence detection Department inspection An operation state determination unit that determines an operation state of the video device based on output, a remote control transmission unit that transmits a remote control signal to the video device, a communication interface unit that interfaces with the communication line, A control unit for receiving a control signal from the communication interface unit and receiving the discrimination output of the operation state discrimination unit and controlling the switch circuit and the remote control transmission unit, wherein the control unit controls the communication line When there is an incoming call accompanied by a video signal, the switch circuit is switched to the side for selecting the test video signal, and based on the discrimination output of the operation state discrimination section, the remote control transmission section causes the video equipment to operate. A device for communication connection with a video device, which is adapted to generate an appropriate remote control signal to the device.