JPH01130298A - Communication system in television community receiving network - Google Patents

Abstract

PURPOSE:To transmit a state to a security monitoring person by a hand-free phone by setting plural narrow-band communication lines to each of two television channels and using each of these plural narrow-band communication lines as a pair of transmitting and receiving lines. CONSTITUTION:An independent TV program broadcasting equipment 14 broadcasts signals of an image, a voice, a video recorder, etc., from a studio to a specific channel. A multichannel access (MCA) center equipment 15 for executing a voice communication and an FAX communication in a television community receiving network sets plural narrow-band communication lines to each in bands of a dead channel of a television from which two or three channels or more have been separated. To this MCA center equipment 15, a monitoring device 18 is connected, and each of plural narrow-band communication lines is used as a pair of transmitting and receiving lines.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a security communication system in a television public viewing network.

(Prior Art) Conventionally, this type of communication system for a television public listening network has been used for communication between residential building users and a control center and between residential building users within the public listening network. In addition, there are local programs such as Rifnis 1, simultaneous broadcasts from the control center, and automatic security notifications for residential buildings.

(Problems to be Solved by the Invention) The above-mentioned conventional television public listening network had the disadvantage that it was not possible to provide an interrupt notification even if security communication occurred when communication was being carried out between residential buildings.

In addition, automatic security information transmission systems that use fire, gas leak, and security sensors often generate false alarms due to malfunction of sensor circuits, making confirmation operations difficult, and furthermore, when a fire actually occurs, the person responsible for reporting There were drawbacks such as the person becoming unconsciously excited and unable to pick up the handset.

The purpose of the present invention is to eliminate the drawbacks of the prior art, and even if a call is being made between buildings or within a local area, the call can be stopped for approximately 3 minutes, for example, to send a security report to the control center, and the report can be confirmed. After termination, the previous communication can be automatically resumed.

In addition, in the event of a fire or gas leak, etc., and a crime prevention sensor is activated and a report is sent to the control center, the control center is equipped with an excellent TV system that allows you to check the timing from the control center hands-free. The purpose of the present invention is to provide a communication method within the listening network.

(Means for Solving the Problems) The intra-television community communication system of the present invention sets a plurality of narrowband communication paths in each of two television channels in a television community system such as CATV, and Each of the multiple narrowband communication channels is used as a pair of transmission/reception channels, and when a safety problem occurs in a monitoring system such as a security system and an automatic alarm device operates or issues a manual alarm, the communication A new communication line is set up by sending a security signal and self-number to the security center, and an alarm signal is sent to set up a hands-free call state, and a hands-free call is made to the security center. This allows the user to explain the situation, and the hands-free time is determined by the terminal's timer.

(Function) According to the present invention, the main body of the communication device is coupled to a coupler such as coaxial or optical fiber for common television viewing, and automatically accesses the control channel from the control center and the communication channel for transmission and reception. It allows you to make calls and receive fax signals using a handset. In addition, when a signal is output from the security unit to send fire, gas leak, or crime prevention data, the home telephone automatically interrupts the line even if it is busy with another telephone, and controls the security signal. In addition to transmitting and receiving data to the center, it also enables telephone calls using a hands-free telephone. This communication method prioritizes security, and the call is disconnected after a predetermined period of time, allowing the previous call to continue.

(Example) An example of the present invention will be described based on FIGS. 1 to 5.

FIG. 1 is a block diagram showing the functions of a control center (hereinafter abbreviated as "center") of a communication system within a television public listening network according to the present invention. In the figure, 11 is a television receiving antenna, 12 is a TV shared viewing device, 13 is a studio for local programs on a shared viewing network, 14 is an independent TV program broadcasting device, and studio 1
Video, audio, video recorder, etc. signals from 3 can be broadcast to a specific channel. Reference numeral 15 is a multi-channel access (MCA) center device that performs voice communication and FAX communication within the television public listening network, and uses the bandwidth (6M[
A narrowband FM or narrowband digital communication channel is set within (z), for example, at 12.5 to 7 to 50 kHz intervals. In this case, 120 to 400c
h pair circuits can be formed. 16 is residential building 2A or 2
17 is an I"AX device that issues simultaneous commands such as notices and announcements; 18 is a security monitoring device; 19 is a rv signal, independent program,
It is a shared device for input/output of public listening private communication, and is a headend connected to a coaxial cable or optical fiber. 2A
2N to 2N are devices of common listening subscribers.

FIG. 2 shows a public listening subscriber device. In the figure, reference numeral 20 denotes a television viewing line using a coaxial cable or an optical fiber. 21 is a coupler connected to the television common viewing line 20, 22 is a television receiver, 23 is an MCA communication device,
24 is a security unit that automatically sends notifications for fires, gas leaks, and crime prevention; 25 is a fax machine used for receiving general fax communications and mass notifications; 626 is a telephone line of a telephone carrier such as NTT; and 27 is a A home telephone, 28 is a changeover switch for switching between a FAX, a phone of a communication carrier such as NTT, and a home telephone, and 29 is a door phone.

FIG. 3 shows an example of TV channel arrangement in a television public viewing network. The channel arrangement is at 6 MHz intervals, and is generally arranged with a space of one channel or more,
In addition, the MCA channel is placed upstream from the center, and the downstream channel is placed several channels apart. Furthermore, this signal is designed not to affect the image on the TV receiver.

Narrowband FM or digital signals spaced between 12.5 and 50 kHz are used within the MCA channel.

Note that the downlink signals from the center to each residential building may be multiple FM or digital multiple lines, and FDM channels or time-division time slots may be used as communication channels.

Here, both the uplink and downlink channels to the center will be explained as narrowband communication paths. The 6MHz band can accommodate n groups of communication systems, and one group consists of 8 or 16 channels depending on the user's characteristics, and one of these channels is used as a control channel to control connections for incoming and outgoing calls. However, there is a method in which the paging channel and reception channel are separate channels.

Furthermore, each channel is used for communication as a pair of upstream and downstream channels.

Now, the call loss rate En=0.03. When the subscriber call volume is 5 minutes x 3 times/day + 0.25 erl + busy hour concentration rate 115, 16 channel system and 8 channel system, and one channel is used as a control channel, the traffic that can be carried is:
9.52.3.25erl, respectively, and the number of accommodated subscribers is 190 buildings for the 16 channel system and 66 buildings for the 8 channel system from N=T, / (0, 25 x 115).

In the case of a 16-channel system, the MCA center on the control center side includes 16 transceivers, idle line signals, individual calling signals, response signals, data signals, subscriber number memory, etc., and operates these in a timely manner to communicate with subscribers. It has a line control device that performs connection operations between each other, between subscriber centers, and between subscriber security.

FIG. 4 is a detailed block diagram of the MCA communication device 23 installed in each residential building, and 20 is a T that connects the center and each residential building.
Coaxial cable for V common listening, 21 is cable, coupler,
30 is a code for the NC'A communication device 23 and the communal television receiver 22; 31.32 is a transmission/reception filter; 33
34 is a receiving device, 34 is a transmitting device, and 35 is a synthesizer of a local oscillator of the transmitting/receiving device, which can be set as a control channel or any communication channel by a control device 36. The control device 36 can perform the above-mentioned channel control and operation control of the MCA communication device. 37 is various memory circuits, 38 is a hands-free device, 39 is a speaker,
40 is a microphone for hands-free calling.

FIG. 5 shows signal transmission and reception methods in various connections.

Next, the operation will be explained.

(1) Reports from the center to each residential building A report from the center to all residential buildings is dialed using the key switch of the communication device 16 and the dial D. This signal passes through the monitoring device, the control channel of the MCA center device, and the receiving device 3 of the MCA communication device shown in Fig. 4 in all residential buildings.
3 to the control device 36.

The control device 36 connects the hands-free device W138 to the speaker 39.
It is possible to make a report by setting the state to broadcasting and unilaterally emitting the output voice of the reception bag @33.

(2) Calling between the center and the residential building The center calling device 16 calls the specific residential building, the residential building 1, using a key switch and a dial. The residential building 1 returns a response signal Ach and receives the designation of the idle call channel Sj from the center. Residential building 1 returns Ach, and the center and residential building 1 communicate by hooking up the handset. When the call ends, the handset hooks on to send a call termination signal.
The monitoring device 18 returns the device to a standby state.

(3) Calling between residential buildings Pick up the handset of the home telephone 27 of residential building 1 and dial the called residential building K using dial D on the key switch. The center designates Ach+51ch, and residential building 1 switches to the designated 51ch and transmits Ach, and the center transmits a ring tone. During this time, the center calls residential building K from the control channel. Ach from residential building K, S, ch from center
Send Ach from S and ch to the designated signal and residential building. The monitoring device 18 at the center connects the audio lines of 5ich, S, and ch to make a call.

The above calling method is a basic one, and when D is dialed in the housing building 1, the dial number is displayed on the front desk and is stored in memory.

Next, by pressing the send button, the above call is automatically made. In addition, if the called party is busy or does not answer, the last number memory allows the call to be connected by redialing.

(4) Security notification Security notifications include fire, gas leak, security alarm, etc. There are two methods for this alarm: automatic notification by a sensor and manual notification. The building for security notifications sends a signal SQ indicating the type of security on the control channel in the same way as for calls.
The residential building number is sent together with the calling signal. The center sends this information to the security monitoring department, sounds a buzzer, displays the building number on the display, and intermittently displays a lamp to alert the security personnel as soon as possible. During this time, the MCA communication device in the residential building is switched to the communication channel and a ringback sound is played. The control device 36 of the residential building 1 is automatically set to a hands-free talking state due to the security notification. Here, in response to a response from the security side, it becomes possible to make a telephone call in a hands-free state on the residential building side.

Even if the building side is silent at this time, the situation inside the room can be known acoustically. In the event of a fire, etc., residents in the building do not need to have a handset and can notify the security monitoring department.

In addition, if a security call occurs during a call from building 1 to another building, the call channel number of the other party being called will be memorized, the call will be temporarily interrupted, and the connection for the security call will be established. conduct.

When you end a hands-free call, it automatically connects to the line and allows you to call the previous party. At this time, the security information may also be notified to the other party of the call using a voice generator or the like. Note that the security information is also notified to the users of the residential building 1 by voice.

Furthermore, privacy can be protected by terminating hands-free communication by controlling the timer of the terminal on the residential building side.

(Effects of the Invention) According to the present invention, when a security alarm is sent to the center automatically or manually, a hands-free call state is established, so residents in the building can use hands-free communication to check the situation without having to hold a handset. You can tell the security supervisor. In addition, if an alarm is automatically issued and a security staff responds but no response is received, the hands-free device allows the user to acoustically know the state of the room. Furthermore, even during a call, an interrupt notification can be automatically made and an audio broadcast can be made at the same time as a call occurs, so the practical effect is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the communication system within the TV common listening network according to an embodiment of the present invention, Fig. 2 is a block diagram of the equipment in the same residential building, Fig. 3 is a channel arrangement diagram of the TV common listening system, and Fig. 4 The figure shows M on the residential building side.
A configuration diagram of the CA communication device, and FIG. 5 is a signal diagram of the communication connection. 11... Receiving antenna, 12... TV shared listening device,
13... Studio, 14... Independent TV program broadcasting device, 15... MCA center device, 16... Transceiver device, 17... FAX''3ArI!, 18... Security monitoring device, 19 ...Head end, 20...
・TV listening line, 21... coupler, 22...
Television receiver, 23... MCA communication device, 24...
Security unit, 25... Fax machine. 26.Telephone line, 27..Home telephone, 28..
Changeover switch, 29... Door phone, 30... Cord, 31.32... Transmission/reception filter, 33...
Receiving device, 34... Transmitting device, 35... Synthesizer, 36... Control device, 37... Memory circuit, 38
...Hands-free device, 39...Speaker, 40
...Microphone. Patent applicant Matsushita Electric Industrial Co., Ltd. Q＼ Figure 3

Claims (2)

[Claims] (1) In a television shared viewing system such as CATV, a plurality of narrowband communication channels are set for each of two television channels, and each of the plurality of narrowband communication channels is used as a pair of transmission/reception channels. A communication system within the television public listening network. (2) When a safety problem occurs in a monitoring system such as a security system and an automatic alarm device activates or issues a manual alarm, the call line is temporarily put on hold and a security signal is sent to the security center. In addition to sending your own number and setting up a new communication line, you can set up a hands-free call after sending out an alarm signal, and you can explain the situation through a hands-free call with the security center, and the hands-free time is set by the terminal's timer. Claim No. (1) characterized in that:
Communication system within the television public listening network described in Section 1.