JPH0520037B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a broadcasting device that performs normal television broadcasting and paid broadcasting using a television public listening line.

[Prior Art and Its Disadvantages] Conventionally, for example, in a CATV system for performing pay broadcasting, a character image broadcasting device has a configuration as shown in FIG. In the figure, 11 is an antenna for receiving normal television broadcasting,
The television signal received by this antenna 11 is amplified to a predetermined level by an amplifier 12 and then sent to a central facility 13. This central facility 13 is
Paid broadcasting equipment 14 ₁ , 14 ₂ , 14 ₃ that transmits paid broadcasting on channels A, B, and C of the VHF midband or super high band, and text and images such as broadcasting times of paid broadcasting and instructions on how to watch them. VHF
The teletext broadcasting device 15 is configured to transmit a D channel of the mid-band or super-high band, and a mixer 16 is to mix these modulated signals. The output signal of the mixer 16 is sent to the reception control section 19 via the television common listening line 17 and the distributor 18 . This reception control unit 19 includes a changeover switch 20 in which the movable contact a is switched to the fixed contact b side when viewing general broadcasts and switched to the fixed contact c side when viewing paid broadcasts and text images, an A channel converter 22 ₁ , B channel converter 22 ₂ , C channel converter 22 ₃ , D channel converter 22 ₄ ,
It is composed of an MPU section 23 and a front panel 24.

The A channel converter 22 ₁ converts the A channel of VHF band pay broadcasting to the Z channel which is an empty channel of the television receiver 21 (for example, channel 2 in the Tokyo area and channel 1 in the Osaka area). be. Similarly, the B channel converter 22 ₂ , the C channel converter 22 ₃ , and the D channel converter 22 ₄ are B channel converters of the VHF band, respectively.
The C and D channels are converted to the Z channel, which is an empty channel. These converters 22 ₁ , 22 ₂ ,
One of 22 ₃ and 22 ₄ is selected by a control signal from the MPU section 23, and one of the pay broadcasts in the VHF band is converted to the Z channel.

Further, on the front panel 24, as shown in an enlarged view in FIG. "General broadcast" switch to broadcast on general television, pay broadcast channel A, B channel, C
"A" to select one of the channels;
After selecting a pay broadcast using the "B" and "C" switches, a "confirmation" switch is provided to confirm that it is a pay broadcast before viewing. To receive general broadcasts, press "Power"
After pressing the "general broadcast" switch, operate the television receiver 21 as usual,
When receiving paid broadcasting, you can watch it by pressing either the ``A,''``B,'' or ``C'' switch, and then pressing the ``Confirm'' switch. In addition, the MPU section 43 switches the changeover switches 20, A, B, and C by operating the switches on the front panel 24.
and D channel converters 22 ₁ , 22 ₂ , 22 ₃ ,
₂₂₄ , and controls the power supply of the television receiver 21 and each converter.

In such a configuration, when receiving general broadcasts, pressing the "general broadcast" switch on the front panel 24 causes the changeover switch 20 to switch to the third
The state shown in the figure is reached, and as a result, the television signal received by the antenna 11 is amplified to a predetermined level by the amplifier 12 and then directly sent to the television receiver 21. On the other hand, when receiving paid broadcasting, after setting the television receiver 21 on the receiving side to channel Z, which is an empty channel,
By pressing the selection switch "A", "B", or "C", the movable contact a of the changeover switch 20 changes to the fixed contact c.
You can watch paid broadcasts by switching to the side and then pressing the "Confirm" switch. Furthermore, if the "confirmation" switch is not pressed within a certain period of time, the converter of the reception control section 19 is switched to the D channel converter ₂₂₄ , and as a result, the teletext broadcasting device 1
The character image signal from 5 is sent to the D channel converter 22 ₄
After being frequency-converted into a Z channel at the step 1, the signal is transmitted to the Z channel of the television receiver 21.

As described above, in the conventional broadcasting apparatus, a character and image converter (D channel converter 22 ₄ ) is always required in the reception control section 19 in order to receive a character and image.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a small and compact device capable of broadcasting and receiving character images without requiring a character image converter in the reception control unit. Another object of the present invention is to provide an inexpensive broadcasting device.

[Summary of the Invention] A broadcasting device according to the present invention includes a central facility that outputs a general television broadcast signal and a pay broadcast signal, a television receiver that receives the television broadcast signal and the pay broadcast signal, and a television receiver that receives the general television broadcast signal and the pay broadcast signal. The television broadcast signal is directly transmitted to the television receiver, and the pay broadcast signal is transmitted to the television receiver after converting its frequency to the frequency of an empty channel of the television receiver. In a CATV system consisting of terminals, the central facility is provided with a text image broadcasting device that outputs a character image signal, and the frequency of the character image signal is set to be the same as the frequency of the vacant channel of the television receiver, and the When a broadcast signal is not being viewed, the reception control section controls the output signal of the teletext broadcasting device to be directly transmitted to an empty channel of the television receiver.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a television signal received by an antenna 31 is amplified to a predetermined level by an amplifier 32 and then sent to a central facility 33. This central facility 33 has pay broadcasting equipment 34 ₁ , 34 that transmits pay broadcasting on channels A, B, and C of the VHF midband or super high band.
₂ , 34 ₃ , a character image method device 35 that transmits character images such as broadcasting times of paid broadcasting, guidance on viewing methods, etc. on the Z channel, which is an empty channel of the television receiver 41, and a mixer that mixes these modulated signals. 36. The output signal of the mixer 36 is sent to the distributor 3 via the television common line 37.
8 to the reception control section 39. This reception control unit 39 includes a changeover switch 40 in which the movable contact a is switched to the fixed contact b side when viewing general broadcasts and character images, and the fixed contact c is immediately switched when viewing pay broadcasts.
A channel converter 42 ₁ , B channel converter 42 ₂ , C channel converter 42 ₃ , MPU section 43
and a front panel 44.

The A channel converter 42 ₁ converts the A channel of pay broadcasting in the VHF band into the Z channel, which is an empty channel of the television receiver 41 . Similarly, B channel converter 42 ₂ ,
The C channel converter ₄₂₃ converts the B and C channels of the VHF band into a Z channel which is an empty channel. These converters 42 ₁ , 42 ₂ ,
One of 42 _{and 3} is selected by the control signal from the MPU section 43, and one of the pay broadcasts in the VHF band is selected.
is converted into a Z channel.

Further, as shown in an enlarged view in FIG. 2, the front panel 44 includes a "power" switch for turning on and off the power of the television receiver 41 and each converter, and a "power" switch for outputting signals to the television receiver 41. "General broadcasting" switch to broadcast on general television, pay broadcasting channel A, B channel, C
"A" to select one of the channels;
"B" and "C" switches, and after selecting a pay broadcast using these switches, a "confirmation" switch is provided for confirming that it is a pay broadcast and viewing it. To receive general broadcasts, press "Power"
After pressing the "general broadcast" switch, operate the television receiver 41 as usual,
When receiving paid broadcasting, you can watch it by pressing either the ``A,''``B,'' or ``C'' switch, and then pressing the ``Confirm'' switch. In addition, the MPU section 43 operates the switch 40 on the front panel 44 to select the converters 42 ₁ , 42 ₂ , 42 ₃ for the channels A, B, and C, and to switch between the television receiver 41 and each converter. It controls the power supply.

That is, in the present application, the frequency of the character image signal output from the character image broadcasting device 35 of the central facility 33 is set to be the same as the frequency of the Z channel, which is an empty channel of the television receiver 41, and the reception control unit 3
9 does not require a character stroke converter.

In such a configuration, when receiving general broadcasting, it is the same as the case shown in FIG. 3, but when receiving paid broadcasting, the television receiver 41 on the receiving side is set to an empty channel. After tuning to the Z channel, when you press the selection switches "A", "B", and "C", the movable contact a of the changeover switch 40 switches to the fixed contact c side, and then when you press the "confirm" switch, The pay broadcasting signals output from the pay broadcasting devices 34 ₁ , 34 ₂ , 34 ₃ for each channel of A, B, and C are sent to the converters 42 ₁ , 42 ₂ , 4 for A, B, and C.
At step ₂₃ , the signal is frequency-converted into a Z channel and then sent to the television receiver 41, whereupon the pay broadcast can be viewed. However, if the "confirmation" switch is not pressed within a certain period of time, the control signal from the MPU unit 43 switches the movable contact a of the changeover switch 40 from the fixed contact c side to the fixed contact b side, similar to when receiving general broadcasts. become. the result,
The character signal sent from the text image broadcasting device 35 is directly sent to the television receiver 41, thereby making it possible to receive the character image.

In this way, in the present application, the television receiver 41
If you tune to channel Z, which is an empty channel, you will definitely receive either pay broadcasts or text images.

[Effects of the Invention] As described above, according to the present invention, text image broadcasting can be received without providing a text image converter in the reception control section. Therefore, compared to the past,
Since the converter can be eliminated, an inexpensive and compact broadcasting device can be realized, and by using the same number of converters as before, the number of pay broadcast channels can be increased accordingly.

Furthermore, in the present invention, since the frequency of the teletext signal is set to the frequency of an empty channel on the television receiver, even when viewing general broadcasts, if you select an empty channel, you can receive the teletext signal. It has the advantage of being able to receive

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a broadcasting device according to an embodiment of the present invention, FIG. 2 is an enlarged view of the front panel of the device shown in FIG. 1, and FIG. 3 is a diagram showing a conventional broadcasting device. FIG. 4 is a block diagram showing the configuration, and is an enlarged view of the front panel section of the device shown in FIG. 3. 31...Antenna, 33...Central equipment, 34 ₁ ,
34 ₂ , 34 ₃ ... pay broadcasting device, 35 ... teletext broadcasting device, 39 ... reception control section, 40 ... changeover switch, 41 ... television receiver, 42 ₁ ,
42 ₂ , 42 ₃ ... converter (A, B, C channels), 43 ... MPU section, 44 ... front panel.

Claims (1)

[Claims] 1. A central television broadcasting system that outputs a general television broadcast signal, a pay broadcast signal, and a teletext signal, and the frequency of the teletext signal is set to the same frequency as a specific channel of the television receiver. equipment; a converter for converting the frequency of the pay television signal to the same frequency as the specific channel of the television receiver; and a first contact for transmitting the output of the central equipment directly to the television receiver. and a changeover switch having a second contact for transmitting the output of the central equipment to the television receiver via the converter; a general broadcast switch for viewing the television broadcast signal; and a general broadcast switch for viewing the television broadcast signal; an operation panel having a pay broadcast switch for viewing the signal and a confirmation switch for confirming the viewing; and when the general broadcast switch of the operation panel is operated, the changeover switch is switched to the first contact point. , transmits the television broadcast signal directly to the television receiver, and when the pay broadcast switch is operated, switches the changeover switch to the second contact, and transmits the pay broadcast signal to the converter. If the confirmation switch is not operated within a certain period of time, the changeover switch is switched to the first contact, and the teletext signal is transmitted to the television receiver. 1. A broadcasting device comprising: control means for controlling the broadcasting device so as to transmit information directly to the broadcasting device.