JPH0441644Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a teletext reception and retransmission system used in television community reception systems and CATV in hotels, inns, etc.

(Prior Art) Conventionally, as shown in FIG. 2, each terminal 1 includes an RGB television receiver 2 and a character multiplex adapter 3 or a general television receiver 4, a character multiplex tuner 5, and a character multiplex adapter 6. A television broadcast signal received by a public listening antenna 7 is sent to each terminal 1 via a head end device 8 and a public listening line 9. The RGB television receiver 2 normally receives the television broadcast signal of the selected channel, but if the television broadcast signal is a teletext signal selected by the teletext adapter 3, the teletext Detects the teletext signal from the signal and displays the text on the screen. Further, the regular television broadcast signal is sent as is to the general television receiver 4 by the teletext tuner 5, and the teletext signal is separated into the multiplexed teletext signal and the television broadcast signal. is selected by the character multiplex adapter 6 and sent to the general television receiver 4.

(Problems to be solved by the invention) In the above conventional system, each terminal includes an RGB television receiver 2, a character multiplex adapter 3, or a general television receiver 4, and a character multiplex tuner 5.
and a character multiplex adapter 6 are required, which is expensive. In addition, the operation of each terminal is somewhat complicated, and not everyone can operate it easily.

(Means for solving the problem) The present invention includes a receiving unit that detects and selectively outputs a teletext signal multiplexed from a television broadcast signal from a public antenna, and A modulator that modulates the teletext signal into a television broadcast signal of a channel different from the original channel, and mixes the television broadcast signal from this modulator and the communal listening antenna and sends it to the communal listening line. Equipped with a mixer.

(Function) The receiving section detects the teletext signal multiplexed from the television broadcast signal from the public antenna and selectively outputs it, and the teletext signal passes through the mixer and is sent to the public listening line. Sent.

(Example) FIG. 1 shows an embodiment of the present invention.

A television broadcast signal is received by a communal antenna 11 and applied to an adjacent mixer 12 and a text multiplex tuner 13. The text multiplex tuner 13 and the text multiplex adapter 14 constitute a receiving section that detects and selectively outputs a teletext signal, and the text multiplex adapter 14 is designed to select a teletext broadcast program using a button. The teletext tuner 13 detects the teletext signal multiplexed from the teletext signals among the television broadcast signals from the antenna 11, and detects the teletext signal, whichever one is selected by the teletext adapter 14. The signal is sent to the modulator 15 via the character multiplex adapter 14 and the character multiplex tuner 13, but if it is not selected by the character multiplex adapter 14, it becomes invalid. The modulator 15 modulates the teletext signal from the teletext tuner 13 into a television broadcast signal of a channel different from the original teletext signal, for example, an open channel, and this television broadcast signal is sent to the adjacent mixer 12. The signal is mixed with the television broadcast signal from the communal listening antenna 11 and sent to a plurality of terminals 18 via the head end device 16 and the communal listening line 17. The text multiplex tuner 13, the text multiplex adapter 14, and the adjacent mixer 12 are provided as many as the number of text multiplex channels that can be received by the communal listening antenna 11, and the above-mentioned processing is performed for each channel.
All teletext broadcasts can be received. Each terminal 1
8, a general television receiver 19 is used. Therefore, the viewer can select a channel on the general television receiver 19 and watch general television broadcasts and teletext broadcasts, and the teletext adapter 14 can be operated by a person other than the viewer.

(Effects of the invention) As described above, according to the invention, the teletext signal multiplexed in the receiving section is detected from the television broadcast signal from the public antenna, and is selectively output. Since the modulated television broadcast signal of a channel different from the original channel is mixed with the television broadcast signal from the public antenna to the public line by a mixer, each terminal can use a general television receiver. It is easy to use, inexpensive, and easy to operate the terminal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing a conventional system. 11...Community antenna, 12...Mixer, 1
3, 14... Receiving section, 15... Modulator, 17...
communal listening line.

Claims (1)

[Scope of utility model registration request] A receiver that detects and selectively outputs the teletext signal multiplexed from the television broadcast signal from the public antenna, and a receiver that modulates the teletext signal from this receiver to make it different from the original channel. a modulator for making a television broadcast signal of the channel;
A teletext broadcast reception/retransmission system comprising this modulator and a mixer that mixes television broadcast signals from the public listening antenna and sends the mixture to a public listening line.