JP2003060642A - Private communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a private communication system capable of simultaneously transmitting images and voice by the same signal line of a local area network through a plurality of channels, therefore attaining saving of wiring and expanding the functions. SOLUTION: In transmitting respective information of images and voice, a lobby intercom 1 generates a communication start request command in a control section 100, and transmits the command to a GK/GW(Gatekeeper/ Gateway) device 8 by an IP(Internet Protocol). The device 8 stores band information such as an IP address or a band quantity for use of the intercom 1 on the basis the reception of the command, and transmits a communication start response command in a digital multiplexed packet by the IP. Upon receiving the response command from the device 8, the intercom 1 writes an IP address of destination into a destination header, and transmits the respective information of images and voice in a digital multiplexed packet by the IP.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local communication system for video / audio communication in a housing complex, a hospital or the like.

[0002]

2. Description of the Related Art As a conventional example of a communication system on a premises, a home automation system for an apartment house (condominium HA
The system configuration is shown in FIG.

This condominium HA system is a home automation (H) installed in a lobby intercom 1 installed in a lobby LB, a manager's room K, etc., as shown in the figure.
It is composed of a system master unit 2 for integrating A), a house information board 3 and a doorphone subunit 4 installed in each dwelling unit H, and a fire detector etc. 5 installed in each dwelling unit H and a manager room K. .

The video / audio communication in the condominium HA system is performed between the house information board 3 and the lobby intercom 1.
Alternatively, it is performed between the house information board 3 and the system master device 2, and further between the lobby intercom 1 and the system master device 2.

In addition, a fire / emergency notification (alarm transmission) is transmitted when the fire detector 5 detects a fire or when an emergency button (not shown) on the home information panel 3 is pressed, and the home information panel 3 and the system parent. It is performed with the vessel 2.

[0006] By the way, the wiring structure for connecting the lobby intercom 1 of the condominium HA system, the system master unit 2, and the housing information board 3 provided in each dwelling unit H is one pair for video and one for audio. Signal line 6 consisting of 1 pair, 3 pairs, 1 pair for fire / emergency alarms.
Is used.

As a signal transmission method used,
An analog FM modulation signal is used for a video signal, a baseband signal is used for an audio signal, and a fire / emergency notification (alarm transmission) is usually performed by polling selecting communication.

[0008]

[Problems to be Solved by the Invention] Condominium H described above
Since the A system uses analog communication, only one channel (call) can be used at the same time for video / audio communication, and the signal line is divided for video communication, voice communication, and fire / emergency notification. There is a problem that the wiring becomes complicated. Further, when data communication is added to this condominium HA system, there is a problem that it is difficult to expand the function because another wiring is required.

The present invention has been made in view of the above points, and an object of the present invention is to transmit video and audio simultaneously on a plurality of channels by the same signal line of a local network. It is possible to reduce wiring,
Moreover, it is to provide a local communication system whose functions can be easily expanded.

In addition to the above objects, it is an object of the present invention to provide a local communication system which does not give a feeling of strangeness between the reproduction of video and the reproduction of audio.

[0011]

In order to achieve the above object, according to the invention of claim 1, transmission of voice information between information devices for making a voice call and information device equipped with an imaging camera, The video information is transmitted to the information equipment equipped with the display means for monitoring the video by digital multiplex packet transmission by the IP protocol through the local network provided in the building premises.

According to a second aspect of the invention, in the first aspect of the invention, the local network includes a first information device having an image pickup camera and a first voice input / output means for voice communication, and a video monitor. When transmitting the video information and the voice information packetized by the IP protocol from the first information device by connecting the second information device provided with the display means and the second voice input / output means for voice communication. , The video information in each packet, the video corresponding to the audio information, and the time information when the audio was captured are added to each packet,
In the information device, the reproduction timing of the video on the display means and the reproduction timing of the audio on the second audio input / output means are adjusted with reference to the time information added to the received packet. It is a thing.

According to a third aspect of the present invention, in the first aspect of the present invention, the local network includes a first information device having an image pickup camera and a first voice input / output unit for voice communication, and a video monitor. And a second information device having a second voice input / output unit for voice communication is connected, and in the second information device, the timing of reproducing the voice by the second voice output unit is delayed. , A delay buffer for adjusting the reproduction timing of the video on the display means and the reproduction timing of the audio on the second audio output means is provided in the middle of the processing path from the unpacket of the received video information to the analog conversion. It is characterized by that.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the local network includes a first information device having an image pickup camera and a first voice input / output unit for voice communication, and a video monitor. And a second information device having a second voice input / output unit for voice communication is connected to the second information device, and a delay time for transmission of voice information from the first information device is set in the second information device. , The audio reproduction timing of the second audio input / output means is adjusted to match the video reproduction timing by delaying the video reproduction timing of the display means of the second information device. The delay time of the audio information transmitted from the information device to the first information device is shortened, the transmission direction from the second information device to the first information device, and the first information device to the second information device. There is no delay in audio information depending on the transmission direction of Different for universal and is characterized in.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to embodiments.

(Embodiment 1) This embodiment is applied to a condominium HA system consisting of a plurality of buildings. As shown in FIG. 1, the lobby intercom 1 and the monitoring camera device 7 provided in the lobby LB of each building X1 ... , System master unit 2 provided in the administrator room K, gatekeeper / gateway device (hereinafter referred to as GK / GW device) 8, 10BASE
-T or hub 10 for branching the signal line L of the 100BASE-T specification local network, and each building X1 ...
Local network connection device and system master unit 2
, And a hub 12 for branching the signal line L of the network from the system master unit 2 and the GK / GW device 8 to the router 11 for performing routing with the GK / GW device 8 and each router 11. , Housing information board 3 provided in each dwelling unit H, intercom subunit 4, each dwelling unit H and manager room K
Is connected to the external public network PT via the GK / GW device 8 and the Internet IN is provided with an access point on the public network PT via an Internet connection provider ISP. Connected. Further, communication with the mobile terminal 201 can be performed through the base station 200 of the mobile communication network.

The image pickup camera 104 of the lobby intercom 1 (see FIG. 5) and the image pickup camera 7 of the surveillance camera device 7
4 (see FIG. 6)), the video signals obtained by image capturing and the input audio signals of the audio input / output means of the lobby intercom 1, the housing information panel 3, and the system master unit 2 are digitally converted by the respective devices, It is encoded and further packetized together with commands and the like to be described later, and I
It is adapted to be transmitted by a digital multiplex packet transmission system based on the P protocol.

In the present embodiment, the transmission band corresponding to 10BASE-T is used, but it is possible to change to 100BASE or 1000BASE specifications according to the required transmission band.

Next, the configuration and function of each device used in this embodiment will be described.

First, as shown in FIG. 2, the housing information board 3 includes a control unit 30, a storage unit 31, an operation unit 32, a video processing unit 33,
The information device includes a display unit 34, a voice processing unit 35, a voice input / output unit 36, a network interface unit 37, a doorphone interface unit 38, and a sensor interface unit 39.

Next, the functions of the housing information board 3 for communicating image information and audio information (only receiving for image information), alarm command communication, alarm display, and alarm sound output will be described below.

The control unit 30 packetizes / unpackets the data and controls each unit, the storage unit 31 stores various information (video information, audio information, etc.), and the operation unit 32 includes various keys. , Emergency button operation, call destination number input, etc.

The network interface unit 37 includes other devices (lobby intercom 1, surveillance camera device 7,
System master unit 2, GK / GW unit 8, other housing information board 3)
Packet communication with (video information, audio information, various data,
It constitutes a transmission / reception means for executing various commands), and a local IP address is assigned.

The intercom interface section 38 transmits / receives a video signal and an audio signal to / from the intercom subunit 4, and the sensor interface section 39 detects a fire detection signal from the fire detector 5.

The video processing unit 33 decodes and D / A converts the video information received from the network interface unit 37 and unpacketed by the control unit 30 or the alarm video information previously stored in the storage unit 31. To convert to analog video signal.

The display unit 34 constitutes a monitor for outputting the screen of the analog video signal from the video processing unit 33.

The voice input / output unit 36 inputs / outputs an analog voice signal by a microphone (not shown) and a speaker (not shown) for voice communication.

The voice processing unit 35 decodes the voice information unpacketed by the control unit 30 or the voice information for alarm stored in the storage unit 31 in advance, and converts it into an analog voice signal by D / A conversion. Voice input / output unit 3
The analog audio signal input from 6 is subjected to A / D conversion and encoding and passed to the control unit 30.

Thus, in the housing information board 3, the voice processing unit 33 passes the voice information A / D converted and encoded to the control unit 30, and the control unit 30 packetizes the encoded voice information, and this packet The converted voice information is transmitted as a digital multiplex packet together with other commands and data from the network interface unit 37 onto the signal line L of the local network by the IP protocol.

Various commands and data such as an alarm command to be sent when a fire is detected by the fire detector 5 or an emergency button is operated are generated by the control unit 30 and transmitted from the network interface unit 37 together with the voice information packet as described above. (Command communication with the GK / GW device 8 will be described later).

As shown in FIG. 3, the GK / GW device 8 is composed of a control unit 80, a storage unit 81, a network interface unit 82, and an ISDN interface unit 83, and is a public network PT which is an ISDN subscriber line network. Performs connection to the Internet IN and bandwidth management.

The control unit 80 is used in this embodiment.
The BASE-T and ISDN signals are converted, and each unit is integrated, and the storage unit 81 stores the band information currently used. Also, the network interface unit 82
Is assigned a local IP address, performs packet communication (various data, various commands) by IP protocol with other devices (lobby intercom 1, surveillance camera device 7, system master unit 2, housing information panel 3), and ISDN interface. The unit 83 communicates with the public network PT and the Internet IN via the public network PT.

The gateway function unit of the GK / GW device 8 firstly has the network interface unit 82.
When a packet addressed to an external IP address or telephone number is received, the control unit 80 performs signal conversion (10BASE-T
→ ISDN), and the ISDN interface unit 83 sends a call to another gateway or the telephone number of the access point of the Internet connection provider, and after connecting the line, voice information,
Transfers video information, destination telephone number or IP address data, etc.

When an incoming call is received from the ISDN interface unit 83 and data is received from the outside, the control unit 8
Signal conversion (ISDN → 10BASE-T) is performed at 0, and the data is transferred from the network interface unit 84 to another device on the local network.

In this embodiment, IS is used as the public network PT.
The DN subscriber network is taken as an example, but the analog telephone network and ADS are used.
L (Asymmetric Digital Subs)
It is also possible to support a CribLine), a CATV, and the like.

On the other hand, the gatekeeper function of the GK / GW device 8 is installed in the control unit 80, and communication transmitted from each device (lobby intercom 1, housing information panel 3, system master unit 2, surveillance camera device 7). The used bandwidth is managed by the request command, and when the bandwidth exceeds a certain limit value, the used bandwidth is limited by rejecting the communication request.

As shown in FIG. 4, the system parent device 2 includes a control unit 20, a storage unit 21, an operation unit 22, a video processing unit 23, a display unit 24, a voice processing unit 25, a voice input / output unit 26, and a network interface. It is composed of a section 27 and a sensor interface section 28, and has the same function as that of each corresponding section of the housing information panel 3 as a function of each section.
It performs voice, alarm command communication, alarm display, alarm sound output, and, as another function, is registered in the storage unit 21 in advance when a fire occurrence from the house information panel 3 or an extremely corresponding alarm command is received. It has a function of referring to the IP address information of the network interface unit 37 of each house information board 3 and multicasting an emergency alert command to a plurality of other house information boards 3.

As shown in FIG. 5, the lobby intercom 1 includes a control unit 100, a storage unit 101, an operation unit 102, a video processing unit 103, an image pickup camera 104, an audio processing unit 105,
It is composed of an audio input / output unit 106 and a network interface unit 107, and has a video and audio communication function similar to the housing information board 3, but for the video, the image pickup camera 10 is used.
4 captures an analog video signal, the video processing unit 103 performs A / D conversion and encoding on the analog video signal, and the encoded video information is further packetized by the control unit 100. The signal is transmitted on the signal line L by digital multiplex packet transmission according to the IP protocol through the communication interface unit 107. The communication process regarding the voice information is performed in the same manner as the housing information board 3.

As shown in FIG. 6, the surveillance camera device 7 includes a control unit 70, a storage unit 71, an operation unit 72, a video processing unit 73,
It is composed of an image pickup camera 74 and a network interface unit 75. It does not have a communication function of voice information but only a transmission function of video information, and it sends the video information at regular intervals to the system master unit 2 and the housing information board. 3 is transmitted. The operation unit 72 constitutes an operation unit for performing adjustment and focus adjustment in the image pickup direction of the image pickup camera 74. The communication process regarding the video information is performed in the same manner as the lobby intercom 1.

Here, in this embodiment, the lobby intercom 1 is provided with the image pickup camera 104 and the image input means by the image processing means 103, and the audio output means and the audio input means by the audio processing section 105 and the audio input / output section 106. It constitutes the first information device, and houses information board 3 and system master unit 2
Is a display means by the video processing units 33, 22 and the display units 34, 24, and the voice processing units 35, 25 and the voice input / output unit 26.
A second information device having a voice input / output unit is constructed.

Next, taking the lobby intercom 1 as an example, the transmission of the video / audio information of this embodiment will be described.

First, when the lobby intercom 1 transmits video information and audio information, the control unit 100 generates a communication start request command as shown in FIG.
GK / GW that received the communication start request command when transmitted by digital multiplex packet transmission by P protocol
The device 8 saves band information such as the IP address of the lobby intercom 1 and the amount of band used in the storage unit 81, and transmits a communication start response command by digital multiplex packet transmission by the IP protocol.

The lobby intercom 1 is GK / G
After receiving the communication start response command from the W device 8, the video information and the audio information are input to the call number input by the operation unit 102 (when the call destination is, for example, the house information board 3, it is assigned to the dwell unit information board 3). No.) is written in the destination header of the packet and then transmitted as a digital multiplex packet according to the IP protocol.

It is assumed that the storage unit 101 stores a replacement table of each call number and its corresponding IP address.

The GK / GW device 8 manages band information in the storage unit 81. However, when the band exceeds a preset value, for example, even if a communication start request command is received from the lobby intercom 1, The GK / GW device 8 has a control unit 80.
By returning a communication start refusal command under the judgment of
Reject the transmission of video and audio information and limit the bandwidth used.

Now, in the house information panel 3 in which the IP address written in the destination header of the above packet matches the assigned IP address, the lobby intercom 1 received through the network interface section 37
The control unit 30 unpackets the packets of video information and audio information from the. The unpacketized video information and audio information are decoded and D / A converted by the video processing unit 33 and the audio processing unit 35, and the analog video signal is sent to the display unit 34 and the analog audio signal is sent to the audio input / output unit 36. The respective images are input and reproduced on the display unit 34 and reproduced on the audio input / output unit 36.

The voice signal input by the voice input / output unit 36 is A / D converted by the voice processing unit 35 and then encoded, and the encoded voice information is packetized by the processing unit 30. The IP address of the lobby intercom 1 is added to the header as the destination and then transmitted through the network interface unit 37 to the signal line 1 of the local network by digital multiplex packet transmission by the IP protocol.

The packetized voice information transmitted from the house information board 3 is taken into the control unit 100 through the network interface unit 107 of the lobby intercom 1 and unpacketized, and then the voice processing unit 105.
The audio input / output unit 1 is decoded and D / A converted by
It is played at 06.

In this way, the video and audio input / output unit 1 picked up by the image pickup camera 104 from the lobby intercom 1
The voice information input at 06 is transmitted as a digital multiplex packet according to the IP protocol, and the voice information input at the voice input / output unit 36 is transmitted as a digital multiplex packet according to the IP protocol from the housing information panel 3 on the receiving side. Will be done.

Next, when the transmission of the above-mentioned video information and audio information is ended, the call end operation is performed by the operation unit 32 of the house information panel 3 or the operation unit 102 of the lobby intercom 1. In this case, Control unit 3 on the side that performed the end operation
Generate a communication end command with 0 or 100 to GK / GW
It transmits to the device 8 and notifies the GK / GW device 8 of the end of communication. GK / GW device 8 that received the communication end command
Deletes the band information of the corresponding device in the storage unit 81, in this case, the lobby intercom 1 that is the calling side, and transmits a communication end response command to the lobby intercom 1.

When each device such as the home information board 3 and the system master unit 2 transmits audio information, or the surveillance camera device 7
Similarly to the lobby intercom 1, the transmission of the video information is performed based on the transmission and reception of the communication start request command and the communication start response command with the GK / GW device 8. Of course, in this case as well, it is input by the respective operation units 32 and 22 or 7
The IP address corresponding to the called number set in 2 is written in the destination header of the packet. In this case as well, it is assumed that the call-destination number and the IP address replacement table are stored in the storage units 31, 21, and 71 of the house information board 3, the system master unit 2, and the surveillance camera device 7.

The IP protocol for voice information is generally called VoIP. Here, ITU-T Recommendation. 323 or MGCP, which is being standardized by IETF, and a standard IP protocol for video information is used.

(Embodiment 2) By the way, when video information and audio information are transmitted from the lobby interphone 1 of Embodiment 1 at substantially the same time, the video information and audio information are coded on the transmitting side and the video on the receiving side. Since the processing time is different when decoding information and audio information, and because the video information and audio information are transmitted in separate packets, and the data size of the video information and audio information is different, the transmission time also differs. , If the analog-converted video signal and audio signal are reproduced as they are, the reproduced video and audio cannot be synchronized (lip synchronization), which causes a feeling of strangeness.

For this reason, in the present embodiment, when the control unit 100 packetizes the video information and audio information of the lobby intercom 1, the video is recorded in the header area of the packet P of the video information or audio information as shown in FIG. The time information when the voice is captured is added as a time stamp TS.
Note that the numerical value described after the characters "video" or "audio" of the packet P shown in FIG. 8 indicates the order information of each information to be transmitted, and the numerical value indicated by the time stamp ST is the time when the transmission is started. Indicates the time until. The unit is ms.

On the other hand, in the receiving side device, for example, the house information board 3, the audio information UPa and the video information UPb which are sequentially received and unpacked are temporarily stored in the storage unit 31 together with the time stamp TS. Then, the control unit 30 refers to the value of the time stamp TS stored in the storage unit 31, extracts the audio information UPa and the video information UPb captured at the same time as shown in the figure, and extracts the video information UPa and the video information UPb.
By simultaneously decoding the respective information UPa and UPb and further converting them into analog, the reproduction timing of the video on the display unit 36 and the reproduction timing of the audio on the audio input / output unit 37 are adjusted. .

In this way, the time stamp (time information) added to the packet P of video information and audio information on the receiving side
By referring to the TS, the reproduction timing of the video and the audio is adjusted, and the time lag which gives a feeling of strangeness between the reproduced video and the audio is eliminated. As a device on the receiving side, it goes without saying that the system master unit 2 also has a function of performing the same processing as the housing information panel 3. . (Embodiment 3) In the adjustment of the reproduction timing of video and audio in the above-mentioned Embodiment 2, a time stamp TS is added to video information and audio information on the transmitting side, and a time stamp T on the receiving side.
Although the video information and the audio information having the same time stamp ST are simultaneously converted into analog signals by referring to S and then reproduced, this embodiment is performed by a receiving device such as a house as shown in FIG. A part of the storage unit 31 of the information board 3 is made to function as a delay buffer, and the unpacketed voice information UPa of the received packet P is temporarily stored in the delay buffer. Then, after delaying the audio information UPa by a delay buffer for a predetermined time, the audio information UPa is passed to the audio processing unit 35 for decoding and analog conversion, and reproduced by the audio input / output unit 36. On the other hand, the unpacketed video information UPb is directly passed from the receiving terminal, for example, the control unit 30 of the house information board 3 to the video processing unit 33 and reproduced.

As described above, in this embodiment, the unpacketized voice information UPa is delayed by the delay buffer 38 for a certain period of time and is passed to the voice processing unit 35, whereby a large amount of information is obtained.
It is possible to match the audio playback timing with the video playback timing, which takes time to transmit and process. As a device on the receiving side, it goes without saying that the system master unit 2 also has a function of performing the same processing as the housing information panel 3. (Embodiment 4) As shown in FIG. 10A, a lobby intercom 1 and a housing information board 3 (or a system master 2))
In unidirectional video information transmission and bidirectional audio information transmission, the delay time inevitably occurs due to the encoding and decoding processing time and transmission time ((b) to (d) in Fig. 10).
Is different from audio information and video information. In the example of FIG. 10, the delay time inevitably generated in the video information shown in FIG. 10B is 300 ms, and the delay time inevitably generated in the audio information shown in FIG. 10C is 100 ms. The delay time of video information is longer than that of audio information.

In view of this point, in the present embodiment, with respect to the downward video information and audio information from the lobby intercom 1 to the house information board 3, the control section 3 is provided in the house information board 3 on the receiving side.
Under the control of 0, the audio information is delayed by 200 ms (● in the figure) so that the total delay time of video and audio is reproduced at the same time. On the other hand, regarding the voice information from the housing information panel 3 to the lobby intercom 1, the above-described 1 is performed under the control of the control unit 100 of the lobby intercom 1.
Play with a delay time of 00 ms. In this way, it is possible to asymmetrically delay the audio in the upstream direction and the audio in the downstream direction, adjust the reproduction timing of the video and audio, and minimize the audio delay time in both directions. In the example of FIG. 10, the audio delay time in both directions is 400 ms (300 ms (downward direction) +100 ms (upward direction)).

(Fifth Embodiment) The first to fourth embodiments described above relate to a local communication system built in a housing complex, but this embodiment relates to a local communication system built in a hospital as shown in FIG. As in each hospital room X, bed B
A monitoring camera device 7 for constantly monitoring the top and an intercom 13 are provided, and the monitoring center Y has a center device 1
4 and gatekeeper device (hereinafter referred to as GK device) 8 '
Are provided, and these devices are connected to the signal line L of the local network by the hub 10.

Since the monitoring camera device 7 has the same structure as the monitoring camera device 7 (shown in FIG. 6) of the first embodiment, the illustration and description thereof are omitted here.

On the other hand, the intercom 13 includes a control unit 130, a storage unit 131, an operation unit 132, as shown in FIG.
The network interface unit 133, the voice processing unit 134, and the voice input / output unit 135 are included.

The control unit 130 packetizes / unpackets the data and controls each unit, the storage unit 131 stores various information (voice information, etc.), and the operation unit 32 performs various inputs such as calling.

Network interface section 133
Is a transmission / reception means for performing packet communication (voice information, various data, various commands) with other devices (center device 14, GK device 8 ').
P address is assigned.

The voice input / output unit 135 inputs and outputs an analog voice signal with a microphone (not shown) and a speaker (not shown), and the voice processing unit 134 receives voice information received from the network interface unit 133, or Storage unit 1
Decoding of voice information for emergency call stored in advance in 31, conversion into analog voice signal by D / A conversion,
And A / D conversion and encoding of the analog audio signal input from the audio input / output unit 135.

The center device 14 is, as shown in FIG.
Control unit 140, storage unit 141, operation unit 142, video processing unit 143, display unit 144, voice processing unit 145, voice input / output unit 146, network interface unit 147.
The functions other than the video processing unit 143 and the display unit 144 are the same as those of the corresponding units of the intercom 13.

Then, the video processing section 33 receives each surveillance camera device 7 received from the network interface section 37.
Information from the video data or the video information for emergency call stored in the storage unit 31 in advance is decoded and converted into an analog video signal by D / A conversion, and the display unit 34 is decoded by the video processing unit 33. , A monitor that outputs a screen of the D / A converted analog video signal.

In the center device 14, video / audio,
When emergency call command communication, emergency call display, and emergency sound output are performed and an emergency call command from the intercom 13 is received as another function,
It has a function of referring to the IP address information of a terminal (not shown) provided in an intercom such as a nurse room or a doctor's waiting room which is registered in advance in the storage unit 21 and reporting an emergency occurrence to a plurality of other terminals. .

The GK device 8 ′ includes each device (intercom 1
4, the center device 14, the monitoring camera device 7) manages the used bandwidth by the communication request command, and when the bandwidth exceeds a certain limit value, the communication request is rejected to reduce the used bandwidth. It has a limiting function.

Thus, in the present embodiment, the video information is transmitted to each surveillance camera device 7 constantly or periodically, and the display unit 144 of the center device 14 can monitor the condition of the patient in each hospital room X.

By operating the operation unit 132 of the intercom 13, the patient in the hospital room or the attendant can bidirectionally perform voice communication with the center device 14. In this case, the display unit 144 of the center device 14 displays an image showing the state on the bed B captured by the monitoring camera device 7, and the nurse or doctor who is waiting at the monitoring center Y confirms the patient's condition with this image. It will be possible.

When a call is made on the operation unit 32 of the intercom 13 to indicate the occurrence of an emergency, the emergency can be automatically notified to terminals in the nurse's room and the doctor's waiting room other than the monitoring center Y.

Since the transmission of each information is the same as that of the first embodiment, detailed description will be omitted.

By the way, in the present embodiment, the surveillance camera device 7 and the intercom 14 are independent of each other and are each assigned an IP address. However, when viewed from the center device 14, a video image based on the video information of the surveillance camera device 7 is displayed. When a time lag occurs between the reproduction and the reproduction of the sound based on the sound information of the intercom 14, a sense of incongruity occurs. Therefore, in the present embodiment, the delay processing method according to the second to fourth embodiments is adopted from the same hospital room. The reproduction of the image and the reproduction of the sound may be synchronized.

(Embodiment 6) This embodiment relates to a local communication system built in an office building, and as shown in FIG. 15, a lobby intercom 1 provided in a lobby LB,
Center device 14, GK provided in the management center K '
A device 8 ', a surveillance camera 7 installed in each room R as necessary, and an information panel 3'.

The information board 3'is shown in FIG. 16 except that the doorphone interface section 38 corresponding to the doorphone subunit 4 and the sensor interface section 39 corresponding to the fire detector 5 of the house information board 3 of the first embodiment are not present. Like the housing information panel 3, the control unit 30, the storage unit 31, the operation unit 3
2. Video processing unit 33 for processing video information, display unit 3
4. A voice processing unit 35 for processing voice information, a voice input / output unit 36, and a network interface unit 37 are provided.

On the other hand, the lobby intercom 1 has the same structure as the lobby intercom 1 in the housing complex, and the center device 14 is the center device 14 in the fifth embodiment.
Basically, the GK device 8 ′ has the same configuration as that of the GK device 8 ′ in the fifth embodiment, and therefore detailed illustration and illustration of the detailed configuration are omitted here.

Although the center device 14 does not have the emergency call function in the fifth embodiment, the image captured by the image capturing camera 104 of the lobby intercom 1 is reproduced on the display part 144 and the voice input / output part 106 of the lobby intercom 1 is reproduced. And a voice call between the voice input / output unit 146 and the voice input / output unit 146. Also, a voice call can be made between the voice input / output unit 36 and the voice input / output unit 146 of each information board 3 '.

Between the lobby intercom 1 and each information panel 3 ', the video information and the audio information are transmitted from the lobby intercom 1 and the audio information is transmitted from each information panel 3'to the lobby intercom 1, respectively. 'Between the voice information is transmitted in both directions.

As a method for synchronizing the video and the audio, any of the delay processing methods of the second to fourth embodiments may be adopted.

[0080]

According to the first aspect of the present invention, the transmission of voice information between information devices for making a voice call, and the transfer from the information device having the image pickup camera to the information device having the display means for monitoring the image. Since video information is transmitted by digital multiple packet transmission by IP protocol through a local network provided in the building premises, it is possible to use multiple channels at the same time in the communication of video and audio, and the communication of video and audio is low. Since it can be performed on the same signal line of the curl network, the wiring can be saved. Especially, since the video information and the audio information are transmitted by the digital multiplex packet by the IP protocol, the EM can be performed on the same signal line of the local network.
There is an effect that the data communication function such as mail and Web can be easily expanded.

According to a second aspect of the present invention, in the first aspect of the invention, the local network includes a first information device having an image pickup camera and a first voice input / output unit for voice communication, and a video monitor. Second display means and second for voice call
Connected to a second information device equipped with the voice input / output means of
When transmitting the video information and the audio information packetized by the IP protocol from the first information device, the video information in each packet, the video corresponding to the audio information, and the time information when the audio is captured are added to each packet. However, the second information device adjusts the video reproduction timing on the display means and the audio reproduction timing on the second audio input / output means by referring to the time information added to the received packet. It is possible to achieve lip synchronization between the video and the audio, and eliminate the discomfort caused by the shift between the audio and the video during reproduction.

According to a third aspect of the present invention, in the first aspect of the present invention, the local network includes a first information device having an image pickup camera and a first voice input / output unit for voice communication, and a video monitor. Second display means and second for voice call
Connected to a second information device equipped with the voice input / output means of
In the second information device, the delay for delaying the sound reproduction by the second sound output means, and adjusting the reproduction timing of the video on the display means and the reproduction timing of the sound by the second sound output means. Since the buffer is provided in the middle of the processing path from unpacket of received video information to analog conversion, lip synchronization between video and audio can be achieved and discomfort due to deviation between audio and video during playback can be eliminated. There is an effect that can be.

A fourth aspect of the present invention is the first aspect of the invention according to the first aspect, wherein the local network is provided with an image pickup camera and a first voice input / output unit for voice communication. The information equipment is connected to a second information equipment having a display means for monitoring a video and a second voice input / output means for voice communication, and the second information equipment is provided with a voice from the first information equipment. By delaying the delay time of information transmission from the video reproduction timing of the display means of the second information device, the audio reproduction timing of the second audio input / output means is adjusted to match the video reproduction timing. Adjusting and shortening the delay time of the audio information transmitted from the second information device to the first information device, the transmission direction from the second information device to the first information device, and the first information device. From the second to the second information device Since the delay of the audio information is asymmetrically changed, the transmission of the bidirectional audio information can be performed while the lip synchronization of the video and the audio is taken in the transmission of the unidirectional video information and the bidirectional audio information. It is possible to reduce the delay time of, and it is possible to eliminate the discomfort caused by the shift between the audio and the video during reproduction and the discomfort during the call.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a house information board used in the above.

FIG. 3 is a configuration diagram of a GK / GW device used in the above.

FIG. 4 is a configuration diagram of a system master unit used in the above.

FIG. 5 is a configuration diagram of a lobby intercom used in the above.

FIG. 6 is a configuration diagram of a surveillance camera device used in the above.

FIG. 7 is an explanatory diagram of video and audio information transmission of the above.

FIG. 8 is an operation explanatory diagram of the second embodiment of the present invention.

FIG. 9 is an operation explanatory diagram of the third embodiment of the present invention.

FIG. 10 is an operation explanatory diagram of the fourth embodiment of the present invention.

FIG. 11 is a system configuration diagram of a fifth embodiment of the present invention.

FIG. 12 is a configuration diagram of an intercom used in the above.

FIG. 13 is a configuration diagram of a center device used in the above.

FIG. 14 is a system configuration diagram of a sixth embodiment of the present invention.

FIG. 15 is a configuration diagram of an information board used in the above.

FIG. 16 is a system configuration diagram of a conventional example.

[Explanation of symbols]

1 Lobby intercom 2 system master unit 3 housing information boards 4 Doorphone subunit 5 Fire detector 7 Surveillance camera device 8 Gatekeeper / Gateway equipment 10, 12 hubs 11 router X1, X2 building LB Lobby H dwelling unit L signal line PT public network ISP Internet connection provider IN Internet 200 base stations 201 mobile communication terminal

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yuzo Kawahara             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Keiichi Aoyama             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor, Ryo Ito             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 5C087 AA32 AA37 AA44 BB03 BB12                       BB14 BB16 BB20 BB32 BB55                       BB65 DD04 DD26 DD29 EE13                       FF01 FF04 FF05 FF17 FF20                       FF23 FF24 GG03 GG04 GG12                       GG23 GG32 GG36 GG51                 5K033 BA02 BA17 DA01 DA06 DA15                       EA07                 5K038 AA03 AA06 CC03 CC12 DD15                       DD18 DD22 EE03 EE05 GG02                 5K101 KK02 KK14 LL05 LL12 NN02                       NN06 NN07 NN14 NN21 PP03                       RR12 RR17 SS07 SS08

Claims (4)

[Claims] 1. Transmission of audio information between information devices for making a voice call and transmission of video information from an information device equipped with an imaging camera to an information device equipped with display means for monitoring video. An on-premise communication system characterized by performing digital multiplex packet transmission according to an IP protocol through a local network provided in a building premises. 2. A local network comprising a first camera equipped with an imaging camera and a first voice input / output means for voice communication.
Information equipment connected to a second information equipment provided with a display means for monitoring a video and a second voice input / output means for voice communication, and video information packetized from the first information equipment by the IP protocol. When transmitting audio information, the video information in each packet, the video corresponding to the audio information, and the time information when the audio was captured are added to each packet, and the second information device adds the received information to the received packet. A local area communication system characterized in that the reproduction timing of video on the display means and the reproduction timing of audio on the second audio input / output means are adjusted with reference to the generated time information. 3. The local network comprises a first camera equipped with an imaging camera and a first voice input / output unit for voice communication.
The information device of No. 2 is connected to a second information device having a display unit for monitoring a video and a second voice input / output unit for voice communication, and in the second information unit, the second voice output unit is used. A delay buffer for delaying the timing of reproducing the audio and adjusting the timing of reproducing the video on the display means and the timing of reproducing the audio on the second audio output means converts the unpacket of the received video information into an analog signal. The local communication system according to claim 1, wherein the local communication system is provided in the middle of the processing path up to. 4. The first local network equipped with an imaging camera and a first voice input / output means for voice communication.
Connected to a second information device having a display means for monitoring a video and a second voice input / output means for voice communication. The second information equipment is connected to the second information equipment from the first information equipment. By delaying the delay time of transmission of the audio information from the video reproduction timing of the display means of the second information device, the audio reproduction timing of the second audio input / output means can be adjusted to match the video reproduction timing. The second information device to the first
The delay time of the voice information transmitted to the second information device is shortened, and the transmission direction from the second information device to the first information device and the transmission direction from the first information device to the second information device are reduced. 2. The delay of voice information is asymmetrically different.
The local communication system described.