JPS60124198A - Voice communication system - Google Patents

Abstract

PURPOSE:To omit a time division switch or a conference speech trunk for a control device and to simplify the hardware constitution and processing of the control device by executing man-to-man normal speech and conference speech on the basis of the same control. CONSTITUTION:When a communication channel CHi is arrived from a transmission line 1a, a telephone set 2a converts an analog voice signal A1 outputted from a voice terminal equipment 3a of the self-station into a PCM voice signal A2 and sends the signals A2 to a transmission line 1b through a communication channel CHj. When communication channels CHj, CHk are arrived from the transmission line 1a, PCM voice signals B2, C2 from voice terminal equipments 3b, 3c are inputted and added and the added signal is converted into an analog voice signal B1+C1, which is outputted to a voice terminal equipment 3a. Telephone sets 2b, 2c also execute similar operation and these operations are repeated, so that the control device 4 executes conference speech between respective telephone sets without using the time division switch and the conference trunk.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a system in which a plurality of communication devices each connected to a voice terminal device are connected to a common transmission path, and calls are made between arbitrary communication devices. The present invention relates to a voice communication system that allows users to communicate with each other.

[Prior art]

As a conventional voice communication system of this type, the one shown in FIG. 1 is known. FIG. 1 is a schematic configuration diagram showing an example of a conventional voice communication system.

In the figure, 1 a + 1 b + 1 c + 1
1 such as d+1e is a transmission path, 2 such as 2a, 2b, 2c is a telephone communication device, 3 such as 3a #3b, 3C is a voice terminal device such as a telephone, and 4 is a management device.

FIG. 2 is a configuration diagram showing a frame used for transmitting all audio signals in the audio communication system of FIG. 1. In the figure, 5 is a frame, SYN is a synchronization pattern, CH, CHi, CHj, CHk.

CHs such as CHn are communication channels. Frame 5 is
The transmission path 1 shown in FIG.
H consists of 8 bits.

Furthermore, it is used as a common line signal channel for transmitting common line signals used for control such as call origination/recovery requests or channel allocation between the voice terminal device 3 and the management device 4 shown in FIG. , for example, a communication channel CH. Generally, in the voice communication system described above, voice signals are encoded into PCM (Pulse C
Modulation) is transmitted as a code.

Now, in the conventional voice communication system shown in FIG. 1, the manner in which a conference call (a mutual communication between three or more callers) is performed will be described in detail below.

FIG. 3 is an explanatory diagram showing a conventional conference call method in the voice communication system of FIG. 1.

In the example shown in FIG. 3, each voice terminal device 3a, 3
b.

It is assumed that a conference call is being made using 3C.

In addition, in order to conduct a conference call, each communication device 2a + 2b
It is assumed that +20 is assigned to the management device 4 and the communication channel CH, and the communication channels CHi, CHj, and CHk are used to convert the common line signal 'f'. In FIG. 3, 6 is a time division switch, 7 is a trunk for conference calls, and both are installed in the management device 4.
Every frame 5, each caller himself is removed from all the callers making a conference call (the voices of all the callers are added). Also, A1+B, , C, shown in FIG. 3 are each voice terminal device 3a. , 3b, and 3c are analog audio signals output, and AhB2.C2 is a PCM audio signal obtained by converting these analog audio signals into 'ePcM.

■ The communication device 2a connects the communication channel CH to the transmission path 1a.
i arrives, the contents of this communication channel CHI, the PCM audio signals B2 . Ct
The analog audio angle signal A of the audio terminal device 3a is input instead, and the ePCM audio signal A! , and is sent to the transmission path 1b on the communication channel cm1. Further, the communication device 2a converts the voice of the voice terminal device 3b and 30 (PCM voice signal B2+C obtained by subtracting the power of No. 8) from the communication channel CHi to the original analog voice signal B.
, 10, and output to the audio terminal device 3aK.

■ When the communication channel CHj arrives on the transmission line 1b, the communication device 2b transmits the contents of the 4g channel CHj, the PCM audio signal A of the audio terminal devices 3a and 3C,
, C, and instead converts them into an analog audio signal B and an iPcM audio signal B of the audio terminal device 3b, and sends them to the transmission line 1c via the communication channel CHj Ic. Further, the communication device 2b converts the entire PCM audio signal h*+ct received through the communication channel CHj into the original analog audio signal AI+CI and outputs it to the audio terminal device 3b.

(3) Communication device 2Ci]: When the communication channel CHk arrives from the transmission path IC, the content of this communication channel CHk is transmitted to the PCM audio signal A of the audio terminal devices 3a and 3b.
,, B2, and instead converts the analog audio signal C1 of the audio terminal device 3C into a PCM audio signal C7, and sends it to the transmission line 1d on the communication channel CHk.

Further, the telephone device 20 converts the PCM audio signal A2 + B x taken in through the communication channel CHk into the original analog audio signal AI + BI L2, and converts it into the audio terminal device 3C.
K output.

■ In the management device fiit 4, when each communication channel CHi, CHj, CHk arrives on the transmission line 1eJ:j), all of them are sequentially sent to the conference call trunk 7. In the conference call trunk 7, the PCM audio signals A21 . IL, *02 is stored once, these signals are added, and each added PCM audio signal B2+
The time division switch 6, which generates C2, A2+C2, and A2+B2 and sends them to the time division switch 6, uses the communication channel CHi.
VcP CM audio signal B.

102 to communication channel CHj) CM audio signal A
2+C6 are placed on the communication channel CHk along with PCM audio signals 40B2t-, respectively, and sent to the transmission path 1a. By repeating the operations described in (-1,) to (2) above, a conference call is made between the respective audio terminal devices 3a, 3b, and 3c.

Since the conventional voice communication system is configured as described above, when a conference call is made between each voice terminal device @3a+3b=3c, voices are exchanged centrally in the management device 4. However, when making a small conference call, there is a drawback that a conference call trunk 7t corresponding to the number of groups is required. Also, between regular calls and conference calls,
The operation of the management device η4 is different, and since all of these operations are controlled, the configuration of the management device 4 becomes complicated.

[Summary of the invention]

This invention was made to improve the drawbacks of the conventional devices as described above, and the management device is a means for allocating a communication channel for a communication device to communicate with an arbitrary communication device via a transmission path. , the communication device is equipped with a means for notifying the communication device of the assigned communication channel number and a means for notifying the communication device of the communication channel number assigned to the other party communication device. means for transmitting and receiving common channel signals such as means for storing all communication channel numbers assigned to the other party;
It is fully equipped with a means for adding and adding the audio signal in the communication channel of the other party, and has a configuration that allows communication to be carried out between the communication devices, and the management device or the communication device is One-to-one regular calls and conference calls can be made under the same control, and the time division switch and conference call trunks of conventional management devices are not required, simplifying the hardware configuration and processing of the management device. 4iR
VC (Voice Communication System).

[Embodiments of the invention]

Examples of the present invention will be described below with regard to -H.

No. 41-1. FIG. 2 is an explanatory diagram showing a call method during a conference call in a voice communication system that is an embodiment of the present invention. In the voice communication system shown in FIG. 4, each voice terminal device 3a+3b, 3
Assume that a conference call is being held between parties c. In addition, in order to conduct a conference call, each communication device 2a * 2b,
2 cl 6 communications (FI channel C) Ii in order to send out the audio signals of each station by exchanging common line signals with the engineering management device 4.

Assume that CHj and CHI are (allocated) and C is assigned.

■ The communication device 2a connects the transmission path 1a to the multi-communication channel CH.
When i arrives, the analog audio signal A+ t-P CM audio signal A that has been output from the audio terminal device 3a of the local station
, and is sent to the transmission path 1b on the communication channel CHi. Furthermore, when the multi-communication channel CHj and the communication channel C)lk arrive from the transmission path 1a, the contents of each communication channel CH, CHI, the PCM audio signal B converted into PCM of the audio terminal devices 3b and 3C, and Cte Take in, add numbers to both A, and analog audio signals B, +C,
and output to the audio terminal device 3a.

(Similar to the communication device 2a, when the communication channel C) ij arrives from the transmission path 1b, the communication device 2b transmits the analog audio signal B output from the audio terminal device 3b of its own station to the PCM audio No. 41 B2. and communication channel C
Hj and send it to the transmission line IC.

Further, when multiple communication channels CHi and communication channels CHI arrive from the transmission path 1b, each communication channel CHi.

Contents of CHk, PCM of Tsumashi voice terminal devices 3a and 3C
The converted PCM audio signals A and C2 are taken in, the two signals are completely added together, and the analog audio signals AI+CI are converted and outputted to the audio terminal device 3biC.

■ Similar to each of the communication devices 2a and 2b, when the communication channel CHk arrives from the transmission line IC, the communication device 2C converts it into the analog audio signal C and iPcM audio signal C7 output from the audio terminal device 3C of its own station. and transmits it to the transmission path 1d on the communication channel CHk. In addition, transmission line I
When communication channel CHi and communication channel CHj arrive from C, the contents of each communication channel CHi and CHj, and the PCM converted into PCM of the audio terminal devices 3a and 3b are
The audio terminal device 3 receives audio signals A and B, adds both signals, and converts the analog audio signals A and +B to IC.
Output to C.

■ In the management device 4, each communication channel CHi, CH
j.

When CHk arrives on the transmission path 1e, it synchronizes with frame 5 and sends it out through the transmission path far.

By repeating the operations 21t■ described in (5) to 2a, 2b, and 2c, that is, each audio terminal device 47 (3a, 3b).

An edict call is made between the 3Cs. Also, regular one-on-one
In the case of 0 calls, only one communication channel CEL of the other party is notified from the management device 4 instead of multiple, and as a result, only the contents of one communication channel CH are received from the transmission path 1. Just by performing this operation, the management device 4
Both the communication device 2 and the communication device 2 can perform one-to-one call control using the same call control as in the above-described conference call.

Next, the functions of each part constituting the communication device 2 applied to the voice excitation system of the present invention will be explained. FIG. 5 is a block diagram showing an example of a telephone communication device applied to the voice communication system of FIG. 4. As shown in the figure, 10 is a shift register that performs serial/serial conversion, 11 is a synchronization section, and this synchronization section 11 detects a synchronization pattern SYNa- from frame 5 shown in the diagram. , 2I
The timing of bits, bytes, frames, etc. and communication channel identification signals are all supplied to each part of the 11 packing device 2'tltsM. 12 is shared iBI! lIl! A = Number of the communication channel CH to be sent and received 1 Number of the communication channel OH of the other party and number t of the communication channel CH for sending the audio signal output by the audio terminal device 3 of the own station - Stored and transmitted Route 1a υInput communication channel C) I is,
This is a communication channel management section that determines whether or not it is the above-mentioned escape channel CH based on the signal sent from the synchronization section 11, and outputs all control signals such as transmission and reception to each related section as necessary. A reception control section 13 inputs the contents of the communication channel CH that has passed through the shift register 10 according to instructions from the communication channel management section 12, and a reception control section 14 adds up all received audio signals within one frame time. The adder 15 is a transmission control unit that transmits a common line signal and an audio signal output from the audio terminal device 3 of the local station. Reference numeral 16 converts and controls common line signals such as call requests and recovery requests from the voice terminal device 30 with the management device 4, and transmits the number of the transmission channel CH assigned for transmission from the management device 4 and the communication channel of the other party. A common line signal control unit that performs memorization and erasure instruction sounds for CH numbers, etc., to the communication channel management unit 12; 17 is a PC that digitizes the analog audio signal output from the audio terminal device 3;
100 is an encoding/decoding unit that converts the M audio signal into an analog audio signal; 18 is an interface unit of the audio terminal device 3;
-107 are signal lines connecting each part.

Next, using the telephone communication device 2a shown in the voice communication 4B system in FIG. 4 as an example, the voice terminal device 113a connected to this communication device 2a is connected to each of the other communication devices 2b and 2C. The operations of the above-mentioned parts during a call with each voice terminal device 3b and 3C will be described below with reference to FIG.
If i arrives.

The synchronization unit 11 notifies the communication channel management unit 12 of this via the signal line 100'ii:. The communication channel management unit 12 that received the notification selects the stored communication channel CH.
Check whether the arrived communication channel CH matches or not, and if so, what the communication channel CH is used for. Trustworthy communication channel CHi″′
Since there is C, the communication channel management unit 12 sends the signal @ioi
'i notifies the transmission control unit 15 that the communication channel CHi through which the audio signal output from the audio terminal device 3a has arrived. Reception control unit 15 that received the above notification
receives the PCM audio signal A2 output from the encoder/decoder 17 via the signal line 102, and also receives the signal i1i! from the synchronizer 11. 103 t = signal line 104 according to the timing signal supplied via
The PCM audio signal Atk and shift register 10 are serially converted and sent to a transmission line 11).

(b) When the communication channels CHj and CHk of the other party arrive.

As described in the previous section (a), when the communication channel management unit 12 is notified of the arrival of the communication channel CHj or CHk from the synchronization unit 11, the communication channel management unit 12 compares it with the stored communication channel C1■. As a result, the arrival of the communication channel CHj or CHI is notified to the reception control unit 13 via the signal line 101'i.

In response to the above notification, the receiver 48 control unit 13 transmits the contents of the communication channel CHj or CHlc from the shift register 10 via the signal line 105, that is, the D PCM audio signal B! Mata t C
2 is received and sent to the adder 14 via the signal line 106. The adder 14 receives the PC sent from the reception control section 13.
The M audio signals B2 and C7 are added in one frame time unit and sent to the encoding/decoding section 17 via the signal Ivi 1107. The encoder/decoder 17 receives the sent PCM audio signals B and 10C.

Meeting analog voice signal 13. +C, and output to the audio terminal device 3a via the interface section 18.

(C) Each communication channel CHi, CHj, CH
When a communication channel CHn other than the communication channel CH for the common line signal and the communication channel CHn arrives.

When the communication channel management section 12 receives the notification from the all synchronization section 11 that the communication channel CHn has arrived from the transmission path 1a, the communication channel management section 12 updates the communication channel CHn that has arrived in the same manner as described in the above sections (a) and (b). When the station checks the sound related to its own station and finds that an unrelated communication channel CHn has arrived, it does not issue any instructions to each section. Therefore, the arriving communication channel CHn passes through the shift register 10 as it is and goes out to the transmission path 1b (.

In the above embodiment, the voice communication system of the present invention uses a ring-shaped transmission line 1, but the present invention is also applicable to a case where a straight or star-shaped transmission line is used. Needless to say.

Further, in the above-mentioned practical example, only one-to-one normal calls and conference calls have been described, but it is clear that the audio communication system of the present invention can also perform audio broadcasting.

〔Effect of the invention〕

As explained above, the present invention provides a voice communication system in which a management device allocates a communication operator channel for communicating with an arbitrary communication device, and communicates the assigned communication channel number to the communication device. Full function to notify the communication channel number assigned to the device to the communication device, and the communication device also stores the number of the communication channel assigned to multiple call parties notified by the management device. Since the structure is equipped with a function that can hold, capture and add the voice signals of the communication channel of the other party, the time division switch and conference call trunk in the management device in conventional voice communication systems of this type are not required. Became barren,
This simplifies the configuration of the management device, and
Regular calls, conference calls, audio broadcasts, etc.
This has the effect that each communication device can be executed under the same control. Furthermore, since the communication channels for transmission and reception are separated in the telephone communication device, transmission and reception control can be realized extremely quickly and easily, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing an example of a conventional voice communication system, FIG. 2 is a block diagram showing frames used to transmit voice signals in the voice communication system of FIG. 1, and FIG. , FIG. 1 is an explanatory diagram showing a conventional conference call method in the voice communication system, and FIG. 4 is an explanatory diagram showing a conference call method in the voice communication system according to an embodiment of the present invention. , FIG. 5 is a block diagram showing an example of a telephone communication device applied to the voice communication system of FIG. 4. In the figure, 1...transmission lines such as 1a to 1e, 2a to 2
6 etc. 2...Telephone device, 3a to 30 etc. 3 - Voice terminal device, 4... Management device, 5... Frame, 6...
Time division switch, 7... Trunk for conference call, SYN
...Synchronization pattern, CH+, CH+, CHj
, CHk, CHn, etc....communication channels,
10... Shift register, 11... Synchronization section, 12.
...Communication channel management section, 13...Reception control section, 14
... Adder, 15... Transmission 16 control section, 16... Common line signal control section, 17... Encoding/decoding section, 18...
- Interface section, 100 to 107... signal lines. In each figure, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Procedural Amendment (Voluntary) 1. Display of the case Japanese Patent Application No. 58-231841 2, Title of the invention Voice communication system 3, Person making the amendment Relationship with the case Patent applicant Representative Apricot Piece 111 Ren 8 Part 4, f (Embedded 5, Subject of amendment Details "41st edition H'i1 scope of inquiry"
and “Detailed Description of the Invention” column. 6. Contents of amendment (1) Detailed section “Claims of Claims v11” attached to Attachment No. 1i
Correct by 1t. (2) "To the device" in the 13th line of page 2 of the same document is corrected to "the device". (3) 1-Audio terminal equipment fFt on page 3, line 13 of the same book
3 J is supplemented with "communication device 2." (4) In the 5th line of page 5 of the same book, ``take in,'' is corrected to ``take in the PCM audio signals B, +C2 which are added.'' (5) In the same book, page 5, line 16, “incorporate,” is replaced with “
The PCM audio signal N+C1 is added, and the correction is made as follows. (6) In the 6th line of page 6 of the same book, ``take in,'' is corrected to ``take in the PCM audio signal At + & added to it.'' (7) "And" on page 9, line 20, page 10, line 12, and page 11, line 3 of the same book are corrected to "and". (8) "Notify from" on page 11, line 14 of the same book is corrected to "notify from to telephone device 2." (9) Thinning-out "One from transmission path 1" on page 11, line 16 is corrected to "one communication device 2 from transmission path 1." OI Amend "communication device" in the second line of page 12 of the same book to "telephone device." Oυ Same book, page 13, line 12, “Digitalize.”
to the rPCM signal. Q-ri In the same book, page 13, line 12, amend "or digitized" to "suruiha." (13 Ibid., page 14, line 20, ``Signal A, shift register'' is corrected to ``Signal A, is placed on the position of communication channel CH1 passing through shift register 10, shift register.''). I Amend "I am doing..." in line 7 of page 15 of the same book to read "Compare with the number of the communication channel CH of the other party who is calling." Attachment 2, Patent Claims: A plurality of communication devices and at least one management device are connected by a common transmission path, and a frame configured by arranging a synchronization pattern and a plurality of communication channels in a time-division manner is streamed on the transmission path. and a voice communication system in which calls are made between arbitrary communication devices using the communication channel, the management device comprising: means for allocating a communication channel for the communication device to send a voice signal to the transmission path; means for notifying the telephone device of a communication channel number assigned by the telephone device to transmit a voice signal and a communication channel number assigned to one or more partner telephone devices with which the telephone device makes a call; The communication device stores means for transmitting and receiving common channel signals such as designation of the communication channel to and from the management device, and the numbers of the plurality of communication channels notified by the management device, and A means for identifying the communication channel assigned for own station transmission from within the communication channel and the communication channel assigned to the other party, and the own station generation using the communication channel assigned to the own station. means for transmitting the audio signals of the communication channel to the transmission path; and means for receiving the audio signals in the communication channel assigned to the communication partner and adding the received audio signals of the plurality of communication partners; 1. A voice communication system, comprising: a voice communication system, wherein the communication devices are configured to communicate with each other.

Claims (1)

[Claims] A plurality of communication devices and at least one management device are connected to a common transmission path, and a frame configured by arranging a synchronization pattern and a plurality of communication channels in a time-division manner is transmitted on this transmission path. , in a voice communication system that performs communication between arbitrary communication devices using the communication channel, the management device includes means for allocating a communication channel for the communication device to send a voice signal to the transmission path; The number of the communication channel assigned by the communication device to transmit a voice signal and the number of the communication channel assigned to one or more other party's communication devices with which the communication device makes a call are determined by the Office 1 communication device. and means for notifying the user, and the communication device includes:
Means for transmitting and receiving common channel signals such as designation of the communication channel to and from the management device; storing all the numbers of a plurality of communication channels notified by the management device; A means for identifying a communication channel assigned for transmission and a communication channel assigned to the other party, and a means for identifying a communication channel assigned to the other party, and a method for transmitting voice signals generated by the own station using the communication channel assigned to the own station. and means for receiving audio signals in a communication channel assigned to a communication partner and adding the received audio signals of a plurality of communication partners, A voice communication system characterized in that a call is made between communication devices.