JPS5931268B2 - Shugoujiyushinsouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a collective reception device, and aims to reduce the cost per terminal.

A block diagram of an embodiment of a collective reception device of the present invention is shown in the figure.

In the figure, a high frequency signal transmitted through a line or broadcasting network 10 is reproduced as a video signal including a video signal and an audio signal by a tuner and a video detection device 11 corresponding to the number of channels. Tuner and video detection device 1
Since several programs are included in the output IIA television signal ICH of the still picture tuner and video detection device 12 having the same functions as 1, a code representing the program is inserted at the beginning of each still picture signal, for example, 12H and 13H. The still image program is then transmitted via a program decoder 13 that separates it, and is then applied to a signal distributor 15 that distributes the still image program to each recording/reproducing head 14. Further, the output signal of the device 12 is recorded on a recording device IT such as a magnetic disk via a recording signal processing circuit 16. Note that the recording device IT rotates synchronously using a signal separated by a synchronization separation circuit 18 that separates the synchronization signal. The head 14 is also used for reproduction, and a reproduction amplification circuit 19 reproduces the output of the head 14. In other words, the still image signal that is intermittently sent through the ICH is continuously refreshed and reproduced, and the device 1
It is input to the signal selection switching circuit 20 together with the output signal No. 1. The circuit 20 operates as a kind of telephone exchange.
An arbitrary signal can be connected to a video display/audio playback device 21 provided in the terminal using a program selection keyboard 22. The keyboard 22 may be a telephone, and the signal selection switching circuit 20 may be a telephone exchange. keyboard 2
When a program is requested by 2, this signal is sent to the communication control device 2.
3, and is connected to a communication line with the center in response to polling from the center to exchange encoded signals. The output signal of the communication control device 23 is output to the line 10. A directional coupler 24 is used to prevent signals input through the line 10 from reaching the communication control device 23. A request from a certain terminal is notified to the center via the communication control device 23, and the center's response, for example, when transmitting the requested program on 5CH, the requesting terminal number and 5CH.
The center returns a message indicating that it will be transmitted on CH. This signal causes the terminal control device 25 to operate and issue a command, and based on this command, the signal selection switching circuit 20 displays the video and reproduces the audio of the 5CH tuner and video detection device 11 and the terminal with the requested terminal number. Connect the device 21. When installing this collective reception device in a hotel, a video display/audio playback device 21 is installed in each room, a keyboard 22 is installed near the head, and other devices 11-20 and 23-2 are installed.
5 in the office machine room, the terminal side can be extremely simplified.

As described above, according to the collective reception device of the present invention, since the collective reception unit etc. can be shared, the overall cost can be reduced, and the cost is expected to be reduced from a fraction to a tens of times. Furthermore, since most of the components are installed at the relay station, the terminal is extremely simplified. That is, the key point of this invention is that all functions for channel expansion are concentrated in a relay center and shared by a large number of terminal receivers. In this way, each receiver can be an ordinary television receiver and can be made as simple as possible.
Moreover, as the number of terminals increases, conventionally, the number of channel expanders for the terminals will need to increase.
According to the present invention, only one set of relay centers is required and the effect of concentration is large. Furthermore, even when adding new services such as still images, there is no need to make any additions or changes to the terminal side. Furthermore, cables installed inside buildings such as hotels do not need to be expensive cables that pass high frequencies for video signal transmission; microphone cables or even regular telephone line cables are often sufficient. This point can also contribute to cost reduction.

[Brief explanation of drawings]

The figure is a block diagram of one embodiment of the present invention. 11... Tuner and video detection device, 20.
...Signal selection switching circuit, 21...Video display/audio playback device, 22...One program selection keyboard, 23...Communication control device, 25... ...
Terminal control device, 12...Still image tuner and video detection device, 13...Program decoder, 14
... Recording/reproducing head, 15... Signal distributor, 16... Recording signal processing circuit, 17...
... Recording device, 18 ... Synchronization separation circuit, 19
... Regenerative amplifier circuit 24 ... Directional coupler.

Claims (1)

[Claims] 1 Installed at a relay station, it receives the signal of a specified transmission channel transmitted from the center via cable and transmits video and video data.
a group of receiving devices for obtaining audio signals; a still image receiving device installed at the relay station for receiving still image signals transmitted from the center via the cable; and a still image receiving device installed at the relay station for receiving the still image signals. A memory for storing the received signal of the device as an image, a reproducing means installed at the relay station for reproducing and outputting the stored contents of the memory, a video display/audio reproducing device installed at each terminal, and a video display/audio reproducing device installed at each terminal. A channel selection device installed at each terminal corresponding to an audio reproduction device, and a directional coupling installed at the relay station and encoded a request signal from the channel selection device and inserted into the cable at the relay station. a communication control device that is installed at the relay station and inputs either the video signal of the receiving device group or the output signal of the reproduction means to a corresponding video display/audio reproduction device; A collective reception device comprising: a signal selection device; and a terminal control device that is installed at the relay station and controls the signal selection device in response to a response signal from the center corresponding to the request signal.