JPH09116889A - Catv voice broadcast system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the system in which equipment configuration and inter- equipment connection are simplified. SOLUTION: An exchange connecting between a broadcast equipment 10 and a TDMA(time division multiplering access) equipment 20 has plural broadcast equipment interface 41. The broadcast equipment interface corresponds one to one to a subscriber group and the relation is stored in a storage device 45. Upon the receipt of a start signal from a broadcast equipment, a central processing unit 44 reads a group number corresponding to the interface and sends it to the TDMA equipment via a TDMA equipment interface 42. Then a channel switch 43 is controlled to form a channel between the broadcast equipment interface and the TDMA equipment interface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CATV audio broadcasting system, and particularly to a CAT in a CATV telephone system.
V audio broadcasting system.

[0002]

2. Description of the Related Art A conventional CATV audio broadcasting system multiplexes a broadcasting device 10 which outputs a broadcasting audio signal and a subscriber group number signal indicating its destination, and a broadcasting audio signal and a subscriber group signal. A TDMA device 20 for converting the subscriber group number from the broadcasting device 10 to the TDMA device 20, and a call path between the broadcasting device 10 and the TDMA device 20. Switch 40 and TDMA device 20
It has a head end device 60 for sending the output signal of the above to the transmission line 50, and a plurality of subscriber circuits 70 connected to the transmission line 50.

The exchange 40 also includes a plurality of broadcasting device interface circuits 41 connected to the broadcasting device 10.
A TDMA device interface circuit 42 connected to each of a plurality of TDMA devices, and a communication path switch 43 for forming a communication path between the broadcasting device interface circuit 41 and the TDMA device interface circuit 42.
And a central processing unit 44 for controlling these and a storage unit 45 for storing programs and data used by the central processing unit.

The operation of this CATV audio broadcasting system will be described below. First, when the broadcasting device 10 issues a start signal to start audio broadcasting, the broadcasting device interface circuit 41 detects the start signal and the central processing unit 44.
Notify to Upon receiving the notification, the central processing unit 44 controls the speech path switch 43 to form a predetermined speech path between the broadcasting device interface circuit 41 and the TDMA device interface circuit 42. When the call path is formed, the broadcasting device 10 starts the audio broadcasting and at the same time,
The subscriber group number indicating the destination of the audio broadcast is output to the control distribution device 30. The control distribution device 30 notifies the TDMA device 20 of the subscriber group number. TDMA device 2
0 multiplexes the broadcast voice from the TDMA device interface circuit 42 and the subscriber group number from the control distribution device 30, and outputs the multiplexed signal to the headend device 60. The headend device 60 further multiplexes the signals from the plurality of TDMA devices 20 and sends them to the transmission line 50.

The subscriber circuit 70 monitors the signal flowing through the transmission path 50, and if it detects a signal addressed to the group to which the own circuit belongs, it receives the audio broadcast signal.

[0006]

In the conventional CATV audio broadcasting system, the broadcasting audio signal sent from the broadcasting device and the subscriber group number signal are transmitted to the TDMA device via different routes. Therefore, there is a problem that the device configuration and the connection between devices become complicated.

It is an object of the present invention to provide a CATV audio broadcasting system which simplifies the device configuration and the connection between the devices.

[0008]

According to the present invention, a broadcasting device for transmitting an audio broadcasting signal, a TDM for multiplexing the audio broadcasting signal and a subscriber group number signal which is the destination thereof.
In a CATV audio broadcasting system having a device A and a switch connected between the broadcast device and the TDMA device, the switch has a number of interface circuits equal to the number of destinations, and each of the interface circuits. Storage means for storing the corresponding subscriber group number signal, and a group for reading the subscriber group number corresponding to the activated interface from the storage means and supplying it to the TDMA device when the interface is activated. It is possible to obtain a CATV audio broadcasting system characterized by having a number supply means.

Further, according to the present invention, a broadcasting device for transmitting a voice broadcasting signal and a subscriber group number signal indicating its destination, and a TDMA device for multiplexing the voice broadcasting signal and the subscriber group number signal. , The broadcasting device and the T
CAT with switch connected to DMA device
In the V voice broadcasting system, the exchange receives the subscriber group number signal, the receiving means, the transmitting means transmits the subscriber group number signal received by the receiving means to the TDMA device, the broadcasting device and the broadcasting device. There is provided a CATV audio broadcasting system characterized by having a means for forming a communication path with a TDMA device.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a CATV audio broadcasting system of the present invention. Here, the same components as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted. The CATV audio broadcasting system of FIG. 1 is different from the conventional CATV audio broadcasting system in that it does not have the control distribution device 30. Further, in the CATV audio broadcasting system of FIG. 1, a broadcasting device interface 41 is provided in a one-to-one correspondence with a subscriber group. The relationship between the broadcasting device interface 41 and the subscriber group number is stored in the storage device 44. further,
1, the broadcasting device 10, the broadcasting device interface 41,
Central processing unit 44, TDMA interface 4
2, and the operation of the TDMA device 20 is different from the conventional one.

Next, the operation of the CATV audio broadcasting system of FIG. 1 will be described. When the broadcasting device 10 intends to perform audio broadcasting to a certain subscriber group, first, the broadcasting device interface 41 corresponding to the destination subscriber group.
A start signal is sent to. The broadcast device interface 41 that has received the activation signal notifies the central processing unit 44 that the activation signal has been received.

When the central processing unit 44 receives the notification indicating that the activation signal is received from the broadcasting device interface 41, the central processing unit 44 stores the subscriber group number corresponding to the broadcasting device interface 41 which has issued the notification in the storage device 45. Read from. Then, the subscriber group number signal representing the read subscriber group number is sent to the TDMA device 20 via the TDMA device interface circuit 42. Also,
At the same time as sending the subscriber group number, the central processing unit 44 controls the speech path switch 43 to form a speech path between the broadcasting apparatus interface circuit 41 and the TDMA apparatus interface circuit 42. Which TDMA
Whether to form a communication path with the device interface circuit 42 is predetermined.

When the subscriber group number is input and then the broadcast audio signal is input, the TDMA device 20 multiplexes these in a predetermined format and outputs them to the headend device 60. The head end device 60 has a plurality of TDs
The outputs of the MA device 20 are multiplexed and sent to the transmission line 50.

The subscriber circuit 70 monitors the signal transmitted to the transmission line 50, and when it detects the group number assigned to itself, starts the reception of broadcast voice.

Next, a second embodiment of the present invention will be described with reference to FIG. Here again, the same parts as the conventional ones are designated by the same reference numerals, and the description thereof will be omitted. FIG.
The CATV audio broadcasting system of 1 does not have the control distribution device 30 like the CATV audio broadcasting system of FIG. A selection signal receiving circuit 21 is provided in the exchange 40.

The operation of this CATV audio broadcasting system will be described below. First, the broadcasting device 10 outputs a start signal to the broadcasting device interface circuit 41. When there are a plurality of broadcasting device interface circuits 41, they are sent to the broadcasting device interface circuit 41 that is not currently used.

The broadcasting device interface 41 that has received the activation signal notifies the central processing unit 44 that the activation signal has been received. Then, the central processing unit 44 that has received the activation signal reception notification forms a call path between the broadcasting device interface 41 that has transmitted the notification and the selection signal reception circuit 21.

The broadcasting apparatus 10 joins the broadcasting apparatus interface 41 indicating a destination after a time required for forming a communication path between the broadcasting apparatus interface 41 and the selection signal receiving circuit 21 elapses. A personal group number signal. Upon receiving the subscriber group number signal via the broadcasting device interface 41 and the call path switch (call path) 43, the selection signal receiving circuit 21 notifies the central processing unit 44 of this. Upon receiving the subscriber group number from the selection signal receiving circuit 21, the central processing unit 44 receives the TDM via the TDMA device interface 42.
The subscriber group number is sent to the A device 20. at the same time,
The central processing unit 44 controls the speech path switch 43,
The call path between the broadcasting device interface 41 and the selection signal receiving circuit 21 that has been set previously is disconnected, and a call path is formed between the broadcasting device interface 41 and the TDMA device interface circuit 42. Then TD
The MA device 20 multiplexes the subscriber group number and the broadcast voice, and the headend device 60 sends the signal from the TDMA device 20 to the transmission line 50.

As described above, according to the embodiment of the present invention, the subscriber group number indicating the destination of the broadcast audio is set to T.
Since the control distribution device and wiring for supplying the DMA device can be omitted, the configuration of the entire system can be simplified.

[0020]

According to the present invention, by providing the exchange with the function of transmitting the group number indicating the destination of the broadcast voice to the TDMA device, the control distribution device and its connection wiring can be omitted. This makes it possible to provide a CATV audio broadcasting system having a simple structure.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram of a conventional CATV audio broadcasting system.

[Explanation of symbols]

 10 Broadcasting Equipment 20 TDMA Equipment 30 Control Distribution Equipment 40 Switch 41 Broadcasting Equipment Interface Circuit 42 TDMA Equipment Interface Circuit 43 Speech Path Switch 44 Central Processing Equipment 45 Storage Device 50 Transmission Path 60 Head End Equipment 70 Subscriber Circuit

Claims (3)

[Claims] 1. A broadcasting device for transmitting an audio broadcasting signal, a TDMA device for multiplexing the audio broadcasting signal and a subscriber group number signal which is a destination thereof, the broadcasting device and the T
CAT with switch connected to DMA device
In the V-audio broadcasting system, when the exchange activates the interface circuits, the number of the interface circuits equal to the number of the destinations, the storage means for storing the subscriber group number signal corresponding to each of the interface circuits. The TDMA by reading the subscriber group number corresponding to the activated interface from the storage means.
A CATV audio broadcasting system having a group number supplying means for supplying the apparatus. 2. The group number supply means is a central processing unit of the exchange, supplies the subscriber group number signal to the TDMA device, and then controls a speech path switch of the exchange to perform the activation. The CATV audio broadcasting system according to claim 1, wherein a call path is formed between the interface circuit provided and the TDMA device. 3. A broadcasting device for transmitting an audio broadcast signal and a subscriber group number signal indicating its destination, and a TDM for multiplexing the audio broadcast signal and the subscriber group number signal.
In a CATV audio broadcasting system having a device A and an exchange connected between the broadcasting device and the TDMA device, the exchange receives the subscriber group number signal, and the receiving means receives the reception means. Transmitting means for transmitting the subscriber group number signal to the TDMA device;
A CATV audio broadcasting system, comprising: means for forming a communication path between the broadcasting device and the TDMA device.