JPH08331554A - Bs decoder power supply controller and video tape recorder - Google Patents

Abstract

PURPOSE: To conduct power saving inexpensively by controlling supply/stop of an AC power supply to a BS decoder. CONSTITUTION: A microcomputer 11 uses a pin jack insert detection circuit 15 to detect the presence of connection between a video tape recorder 1 and a BS decoder 3 and uses a pin jack insert detection circuit 18 to detect the presence of connection between the video tape recorder 1 and a television receiver 2, and uses a BS antenna power supply detection circuit 13 to detect whether or not the television receiver 2 is turned on and controls the supply of AC power through an AC outlet control circuit 17 from an AC outlet 16 to the BS decoder 3 only when the BS decoder 3 is in use and stops the supply of AC power to the BS decoder 3 when the BS decoder 3 is not in use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention controls ON / OFF of AC power supplied to a BS decoder which is connected between a television and a video tape recorder and decodes a scrambled received signal to restore the original signal. The present invention relates to a BS decoder power supply control device and a video tape recorder equipped with this BS decoder power supply control device.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing an example of a conventional television broadcast receiving system. A BS decoder 3 is connected between the video tape recorder 1 and the television 2 as shown. Further, the video tape recorder 1 and the BS antenna 4 are connected to each other, and the distribution signal of the input signal of the BS antenna 4 is supplied to the television 2.

The video tape recorder 1 includes a microcomputer 11 for controlling the operation of the apparatus as a whole, a BS antenna power supply control circuit 12 for controlling the supply of AC power to the BS antenna 4, and a BS antenna power supply output from the television 2. BS antenna power supply detection circuit 13 for detecting the FM, FM for detecting the FM detection signal output from the television 2
The detection signal detection circuit 14, the pin jack insertion detection circuit 15 for detecting the mechanical connection of the pin jack of the code transmitting the video signal output from the BS decoder 3, and the AC power cord plug connected to the BS decoder 3 AC outlet 16 to be inserted, AC outlet 16
It has an AC outlet control circuit 17 for controlling the supply of AC power from the. The conventional BS decoder power supply control device includes a microcomputer 11, an FM detection signal detection circuit 14, a pin jack insertion detection circuit 15, an AC outlet control circuit 17, and the like.

Next, the control operation of the above-described conventional BS decoder power supply control device will be described. The microcomputer 11 controls ON / OFF of AC power supply to the BS decoder 3 based on a mode table as shown in FIG. 4 stored in a built-in memory (not shown) as described below. .

That is, the microcomputer 11 supplies the AC power to the BS decoder 3 as shown in the mode table on / off based on the information from the FM detection signal detection circuit 14 and the pin jack insertion detection circuit 15. Take control. Here, the FM detection signal detection circuit 14 sends information to the microcomputer 11 indicating whether the FM detection signal output from the television 2 is detected or not, so that the television 2 is powered on and the video signal is transmitted. The television 2 is connected to the FM detection input terminal of the tape recorder 1.
The microcomputer 11 is informed of whether or not the code for transmitting the FM detection signal from the is connected.

In the mode table as shown in FIG. 4, when the pin jack insertion detection circuit 15 detects the insertion of the pin jack of the code output from the BS decoder 3, that is, the decoder input of the mode table. When the insertion is "ON" and the FM detection signal detection circuit 14 is detecting the FM detection signal, that is, when the detection input signal in the mode table is "present", the VTR (video tape recorder 1) is detected. About)
Power on / off state and microcomputer 11
Regardless of the state of the timer provided therein, the microcomputer 11 turns on the AC outlet 16 through the AC outlet control circuit 17,
Control is performed to supply AC power to the BS decoder 3 (ON in the figure).

When the decoder input insertion of the mode table is "O"
At the time of "N", and when the waved input signal of the mode table is "absent", the microcomputer 11 receives the AC outlet through the AC outlet control circuit 17 regardless of the ON / OFF state of the power supply to the VTR and the state of the timer. 16
Is turned off to control the supply of AC power to the BS decoder 3 (OFF in the figure).

However, under the same conditions as above, when the power supply to the VTR is on, and the scramble detection or dE setting is made, the microcomputer 11 performs control to supply AC power to the BS decoder 3 (ON in the figure), Alternatively, control is performed to supply AC power (ON in the figure) to the BS decoder 3 even in the timer recording state and during recording of the BS5 channel set to dE.

When the decoder input insertion of the mode table is "O"
At the time of "FF", the microcomputer 11 stops the supply of AC power to the BS decoder 3 (OFF in the figure) regardless of the presence / absence of the detection input signal, the on / off state of the power supply to the VTR, and the timer state. Take control.

Here, the above-mentioned dE setting means that when the decoder input insertion in the mode chart is "ON", regardless of whether the detection input signal in the mode chart is "presence / absence", d
E This is a setting for performing control to supply AC power to the BS decoder 3 (ON in the figure) when the set channel (BS5 channel in this example) is received.

As described above, the conventional BS decoder power supply controller controls power supply to the BS decoder 3 only when the BS decoder 3 is used to save power. However, AC to BS decoder 3
In order to control the ON / OFF of the power supply, the FM detection signal detection circuit 14 determines whether or not the FM detection signal is input from the television 2.
However, since the FM detection signal detection circuit 14 is expensive, the device is expensive.

Therefore, there is a drawback that the set price of the video tape recorder 1 equipped with an expensive BS decoder power supply control device and having a function of power saving the BS decoder 3 also rises.

[0013]

A conventional BS decoder power supply control device is a pin jack detection circuit for detecting the presence / absence of connection of a BS decoder or an FM detection signal detection circuit for detecting the presence / absence of an FM detection signal from a television. Power supply to the BS decoder is controlled by receiving information from other circuits and other circuits, but the FM detection signal detection circuit is expensive, so the device is also expensive. .

Further, there is a drawback that the set price of a video tape recorder equipped with an expensive BS decoder power supply control device also rises.

In view of the above circumstances, the present invention provides a BS decoder power supply control device which can reduce the cost of the device without impairing the supply / stop control function of the AC power supply to the BS decoder, and the BS decoder. An object of the present invention is to provide a video tape recorder capable of suppressing an increase in the price of a set by mounting a power supply control device and saving the power of the BS decoder at a low cost.

[0016]

The invention of claim 1 is a BS
In a television broadcast receiving system in which a video tape recorder equipped with a tuner, a television and a BS decoder for decoding the scramble of a received signal are connected, a control for turning on / off the AC power of the BS decoder is performed B
In the S decoder power supply control device, a first transmission line connection detection circuit for detecting whether or not a transmission line for transmitting an FM detection signal output from the television is connected to the video tape recorder, and an output from the BS decoder A second transmission line connection detection circuit for detecting whether or not a transmission line for transmitting the transmitted video signal is connected to the video tape recorder, and a reception signal from the BS antenna input to the BS tuner to the television. A BS antenna power supply detection circuit that detects the presence or absence of a BS antenna power supply supplied from the television to the BS antenna from the distributed connection line, and at least the detection information from the first and second transmission line connection detection circuits and the BS antenna. A control circuit for controlling on / off of power supply to the BS decoder by using detection information from the power supply detection circuit It has formed.

A second aspect of the present invention is a video tape recorder equipped with a BS tuner, wherein the BS according to the first aspect is provided.
A decoder power supply control device is installed, and this BS decoder power supply control device controls ON / OFF of the AC power supply supplied to the connected BS decoder.

[0018]

In the BS decoder power supply control device according to the present invention, the first transmission line connection detection circuit connects the transmission line for transmitting the FM detection signal output from the television to the video tape recorder. Detect the presence or absence. Second
The transmission line connection detection circuit detects whether or not the transmission line for transmitting the video signal output from the BS decoder is connected to the video tape recorder. The BS antenna power supply detection circuit detects the presence / absence of a BS antenna power supply supplied to the BS antenna by the television from a connection line that distributes a received signal from the BS antenna input to the BS tuner to the television. The control circuit includes at least the detection information from the first and second transmission line connection detection circuits and the B information.
Be sure to use the detection information from the S-antenna power supply detection circuit B
Power on / off control to the S decoder.

In the video tape recorder according to the second aspect of the present invention, the on / off control of the AC power supplied to the BS decoder connected to the BS decoder power control device according to the first aspect is performed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a television broadcast receiving system including a video tape recorder of the present invention equipped with a BS decoder power supply control device of the present invention, a television and a BS decoder. Reference numeral 1 is a video tape recorder equipped with a BS tuner, 2 is a television equipped with a BS tuner, 3 is a BS decoder for decoding a scrambled received signal, 4 is a BS antenna, and these devices are connected as shown in the figure. There is.

The video tape recorder 1 detects a microcomputer 11 for controlling the operation of the apparatus as a whole, a BS antenna power control circuit 12 for controlling the power supply to the BS antenna 4, and a BS antenna power output from the television 2. Pin antenna insertion detection circuit (corresponding to the first transmission line connection detection circuit) that detects the presence or absence of mechanical insertion of the pin jack of the code that transmits the video signal output from the BS antenna power supply detection circuit 13 and the BS decoder 3. 15,
An AC outlet 16 into which a plug of an AC power cord connected to the BS decoder 3 is inserted, an AC outlet control circuit 17 for controlling the AC power supply from the AC outlet 16, and an FM detection signal output from the television 2 is transmitted. It has a pin jack insertion detection circuit (corresponding to a second transmission line connection detection circuit) 18 for detecting the presence or absence of mechanical insertion of the pin jack of the cord. However, the BS decoder power supply control device of this example is the microcomputer 1
1, the pin jack insertion detection circuits 15 and 18, the AC outlet control circuit 17 and the like.

Next, the operation of this embodiment will be described. The microcomputer 11 of the video tape recorder 1 controls ON / OFF of AC power supply to the BS decoder 3 based on a mode table as shown in FIG. 2 which is stored in a built-in memory (not shown). Are controlled.

That is, the microcomputer 11 includes a pin jack insertion detection circuit 15 and a pin jack insertion detection circuit 1.
8, detection information from the BS antenna power supply detection circuit 13,
Based on other information, ON / OFF control of AC power supply to the BS decoder 3 as shown in the mode table of FIG. 2 is performed.

In the mode table diagram of FIG. 2, BS
When the antenna power supply detection circuit 13 detects the power supply to the BS antenna 4, the TV antenna power supply item in the mode table is ON, and when the power supply to the BS antenna 4 is not supplied, the TV antenna power supply is turned on. Power item is OF
Become F.

Further, the pin jack insertion detection circuit 15 is BS
When the insertion of the pin jack of the code transmitting the video signal from the decoder 3 is detected, the item of the decoder input insertion of the mode table is ON, and when the insertion of the pin jack is not detected, the item is OFF. become.

Further, when the pin jack insertion detection circuit 18 detects that the pin jack of the code transmitting the FM detection signal from the television 2 is inserted, the item of the detection input pin insertion in the mode table is It is turned on, and when the insertion of the pin jack is not detected, the item is turned off.

In the microcomputer 11, when the TV antenna power supply in the mode table of FIG. 2 is ON, the decoder input insertion is ON, and the detection input pin insertion is ON, the VTR power supply is O.
Regardless of N, OFF state and timer state, the AC outlet 16 is turned on through the AC outlet control circuit 17.
By setting to N, the control for supplying (ON) the AC power to the BS decoder 3 is performed.

In the microcomputer 11, when the TV antenna power supply in the mode table of FIG. 2 is ON, the decoder input insertion is ON, and the detection input pin insertion is OFF, the VTR power supply is ON and scramble detection and dE setting are performed. AC power is supplied to the BS decoder 3 only when the BS5 channel for which the timer is set to dE is being recorded (O
N), and in other cases, control is performed to stop (OFF) the supply of AC power to the BS decoder 3.

In the microcomputer 11, when the TV antenna power supply in the mode table of FIG. 2 is ON, the decoder input insertion is OFF, and the detection input pin insertion is ON or OFF, V
The AC power supply to the BS decoder 3 is stopped regardless of the ON / OFF state of the TR power source and the timer state (OF
F) is controlled.

In the microcomputer 11, when the TV antenna power supply in the mode table of FIG. 2 is OFF, the decoder input insertion is ON, and the detection input pin insertion is ON or OFF, V
AC power is supplied (ON) to the BS decoder 3 only when the TR power is ON, scramble detection and dE setting are made, and when the timer is recording BS5 channel with dE setting. A to decoder 3
Control to stop (OFF) the supply of C power is performed.

In the microcomputer 11, when the TV antenna power supply in the mode table of FIG. 2 is OFF, the decoder input insertion is OFF, and the detection input pin insertion is ON or OFF,
The AC power supply to the BS decoder 3 is stopped regardless of the ON / OFF state of the VTR power source and the timer state (OF
F) is controlled.

According to this embodiment, when the microcomputer 11 controls the supply / stop of the power supply to the BS decoder 3, whether the video tape recorder 1 and the BS decoder 3 are connected or not is detected by a pin jack insertion as in the conventional case. The circuit 15 is used to detect whether the television 2 is on or not.
The BS antenna power supply detection circuit 13 used for the S power save function performs the pin jack insertion detection as well as the detection of whether the code to which the FM detection signal from the television 2 is sent is connected to the video tape recorder. Since the circuit 18 can detect the information equivalent to the information detected by the conventionally used FM detection signal detection circuit and provide the same to the microcomputer 11, the microcomputer 11 is shown in the mode table of FIG. Like B
By controlling ON / OFF of the AC power supply to the S decoder 3, power saving of the BS decoder 3 can be performed as in the conventional case.

Moreover, the pin jack insertion detection circuit 18 is F
It is much cheaper than the M detection signal insertion circuit, so BS
The decoder power supply control device can be constructed at low cost.

Since the BS antenna power source detection circuit 13 is the one mounted on the video tape recorder 1, it does not cause a cost increase. Therefore, the video tape recorder 1 can perform the power saving of the BS decoder 3 as usual without increasing the price of the set.

However, the above-mentioned BS power save function is a case where the BS distribution output terminal and the television 2 are connected, and when both the television 2 and the video tape recorder 1 are powered off, the BS antenna AC to 4
It is to save power without supplying power.

[0036]

As described above, according to the BS decoder power supply control device of the present invention, the device can be made inexpensive without impairing the function of controlling the supply / stop of the AC power supply to the BS decoder. According to the video tape recorder of the present invention, the power saving of the BS decoder is carried out at low cost,
It is possible to suppress the price increase of the set.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a television receiving system in which a BS decoder power supply control device of the present invention is installed in a video tape recorder.

FIG. 2 is a diagram showing an example of a mode table diagram held in the microcomputer shown in FIG.

FIG. 3 is a block diagram showing an example of a television receiving system in which a conventional BS decoder power supply control device is installed in a video tape recorder.

FIG. 4 is a diagram showing a conventional example of a mode table diagram held in the microcomputer shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Video tape recorder 2 ... Television 3 ... BS decoder 4 ... BS antenna 11 ... Microcomputer 12 ... BS antenna power supply control circuit 13 ... BS antenna power supply detection circuit 15, 18 ... Pin jack insertion detection circuit 16 ... AC outlet 17 ... AC outlet control circuit

Claims (2)

[Claims] 1. A television broadcast receiving system comprising a video tape recorder equipped with a BS tuner, a television and a BS decoder for decoding the scramble of a received signal, and a control for turning on / off the AC power of the BS decoder. In the BS decoder power control device to perform,
A first transmission line connection detection circuit for detecting whether or not a transmission line for transmitting an FM detection signal output from the television is connected to the video tape recorder, and a video signal output from the BS decoder is transmitted. A second transmission line connection detection circuit for detecting whether or not a transmission line is connected to the video tape recorder, and B input to the BS tuner.
A BS antenna power supply detection circuit for detecting the presence / absence of a BS antenna power supply supplied to the BS antenna by the television from a connection line for distributing a reception signal from the S antenna to the television, and at least the first and second transmission lines. 1. A BS decoder power supply control device comprising: a control circuit for ON / OFF controlling a power supply to a BS decoder by using detection information from a connection detection circuit and detection information from the BS antenna power supply detection circuit. 2. A video tape recorder equipped with a BS tuner, wherein the BS decoder power supply control device according to claim 1 is installed, and the BS decoder power supply control device controls ON / OFF of an AC power supply supplied to a connected BS decoder. Video tape recorder characterized by performing.