JP3046390B2 - Telephone system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

 [Object of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone system such as an electronic private branch exchange and a key telephone device.
The purpose is to provide a talkie voice service via an outside line at an inexpensive line.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional electronic private branch exchange 1. When a public line talkie service such as a weather forecast service is received from an outside line via the private branch exchange 1, the following operation is performed.

For example, when receiving a weather forecast service from the extension telephone (STT # 1) 3, the operator lifts the receiver. As a result, an off-hook state is set, and the CPU 13 detects the off-hook of the extension telephone 3 via the control highway. The CPU 13 waits for dial information to be input after the off-hook. In this state, if the operator of the extension telephone 3 dials within a predetermined time, the CPU 13 receives the dial input via the control highway and controls the exchange unit to perform conversion processing. Further, the CPU 13 gives the dial tone to the extension telephone 3 by PCM high by off-hook.
Time switch (TS to deliver through the way
W) 14 and the extension interface (STT) 2 are controlled so that a busy tone is returned if no dial input is made within a predetermined time. The dial tone and the busy tone are provided as PCM data in the time switch 4 and are selectively transmitted under the control of the CPU 13.

In the off-hook state, when an access code for selecting an office trunk (CO), for example, "0" is input from the extension telephone 3, the CPU 13 selects the office trunk 4 which is in an idle state and sets a line loop. Closure is made. The analog public line detects this, sends out a dial tone, and waits for a dial input. At this time, the office line trunk 4 ← → PCM highway ← → as the voice path
Since the time switch 14 →→ extension interface 2 is formed, the extension telephone 3 can hear a dial tone from the analog public line. When the operator who hears the dial tone inputs the dial number of the other party from the extension telephone 3, the dial information is received by the CPU 13 and transmitted to the analog public line. For this reason, it looks as if the extension telephone 3 is directly connected to the analog public line.

[0005] Here, when "177" is dialed in to receive the weather forecast service, the station that has received the dial starts the service. In this way, the extension telephone 3
Will receive the service, and the billing device (SMDR) 15 charges the fee for the service according to the setting of the exchange customer data. At this time, the billing device 15 receives the dial information and the call time data from the CPU 13, and calculates a fee based on the preset billing information.

Although the above description has been given of the case where the extension telephone 3 receives the weather forecast service, the same operation is performed when the extension telephone 5 and the like receive the same service.

[0007]

However, according to the above-mentioned conventional electronic private branch exchange, when the frequency of receiving the service as described above is large, the burden on the service fee may be extremely increased. For example, the burden on a company having a private branch exchange having thousands of extension telephones is heavy.

[0008] Although it is conceivable to simply record and reproduce the above talkie voice, it is difficult to perform appropriate information services and repetitive reproduction, and at present there is no sufficient response.

The present invention has been made in order to solve the problems of the conventional telephone system as described above.
Even if the frequency of receiving the talkie service is large, the burden will not increase and it will be possible to provide appropriate information services,
Another object of the present invention is to provide a telephone system that can be repeatedly played back and is convenient for users. [Configuration of the invention]

[0010]

SUMMARY OF THE INVENTION Accordingly, in the present invention, a recording / reproducing unit for recording and reproducing a talkie sound in a telephone system having an extension telephone and connected to an outside line is provided.
To talkie service source
When there is a dial input, the talk key
Call to the service source or recorded in the recording / playback unit.
To play the talkie sound and give it to the extension phone
A determination unit based on the time information, it is determined to perform the reproduction more Torquay sound on the determination means <br/>, before recording
Play the talkie sound recorded in the sound / playback section to
Judgment to make a call while controlling the extension phone
Call to the talkie service source via an outside line
And the outside line reaching the talkie service source and the
Connect the extension telephone and the recording / playback unit
The talkie sound coming from the service source is sent to the recording / playback unit.
The telephone system is provided with control means for controlling recording .

Further, the determination means of the telephone system according to the present invention has a timer, and makes a determination by detecting whether or not a predetermined dial input is made first in a predetermined time zone based on the timer. It is characterized by the following.

Further, the control means of the telephone system according to the present invention is characterized in that after connecting the external line and the recording / reproducing unit, the connection is continued until a required time regardless of whether the extension telephone is on-hook.

Further, the recording / reproducing unit of the telephone system according to the present invention includes a memory for storing digital data, a storage control means for digitizing a talkie voice and storing the digitized voice in the memory, and a memory stored in the memory. The same voice address detection and holding means for detecting and holding the address of the voice data which is a repetitive part of the talkie for the data, A repetitive reproducing means for repeatedly reading data and performing repetitive reproduction.

[0014]

According to the above construction, a telephone call from an extension telephone to an outside line is provided.
-You can get a chance to record a talkie voice by making a call to a service source . Also, record from time information
If the content is valid, a talkie sound related to reproduction can be given to the extension telephone to receive a service equivalent to a service from an outside line. In addition, the burden of service charges is reduced by limiting outgoing calls to outside lines depending on the time of day.

[0015] In addition, the same talkie voice can be heard from the extension telephone as many times as necessary by repeated playback, which is convenient at the time of missing or the like.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an electronic private branch exchange 17 according to one embodiment of the present invention. The extension telephones 19 and 21 are connected to extension interfaces 18 and 22, respectively. An analog public line is connected to the office trunks 20 and 23, and the ISDN
Terminal (telephone etc.) 27 and G4
Facsimile machine 28 is connected. ISDN I interface 24 and S interface 26
And are connected. The CPU 30 controls the whole components via the control highway, and controls the time switch 31 and the P switch.
The tone is transmitted via the CM highway. A talkie recording / reproducing device 29 is connected to these highways. The CPU 30 is a time switch 3 via a system bus.
1. Control the billing device 32. The time switch 31 has a built-in tone generation source, and the charging device 32 has charging data set in advance. The result of charging by the charging device 32 is displayed on the screen of the console 33.

FIG. 2 shows a detailed configuration of the talkie recording / reproducing apparatus 29. In the following, the operation when the weather forecast “177”, which is a talkie service of the public line, is accessed from the extension telephone 19,
Clarify the effect.

When an off-hook is made by the extension telephone 19,
The CPU 30 detects off-hook via the control bus and controls the time switch 31 to transmit a dial tone. The digital data of the dial tone arrives at the extension interface 18 via the PCM highway, is D / A converted, is given to the extension telephone 19, and is generated as a dial tone. The CPU 30 is waiting for dial input,
Here, dial data is input. Then, the CPU 30
Performs the processing according to the program of the flowchart shown in FIG. First, from the detection of extension off-hook (43), the process proceeds to a determination as to whether an access code of a talkie voice has been input (44). Here, if the input is other than the access code, the process proceeds to a normal process (45). On the other hand, if the access code is the access code, the CPU 30 detects whether or not a preset time has elapsed from the previous recording time based on its own timer (46). Here, the preset time corresponds to a time during which the content of the talkie service is switched. Here, if the time has elapsed, the CPU 30 captures an empty line trunk, closes a current loop, and then sends dial information. At the same time, the central office trunk that originated the call on the PCM highway is connected to the extension interface 18 and the talkie recording / playback device 29, and the talkie recording / playback device is connected.
Start recording on 29 (47). Here, CPU 30
Even if the extension telephone 19 goes off-hook for a short time, the recording is continued without releasing the office trunk until the recording memory is filled. In this way, when the recording for a predetermined period of time is completed, the CPU 30 sets the central office trunk or PCM.
A process for restoring a highway path or the like is performed (48).

FIG. 4 is a timing chart for the above recording.
Is shown in That is, the talkie voice arriving at the time switch 31 via the PCM highway is time-division-converted and transmitted in the slot TSn of the PCM highway.
This data is serial data of 2.048 Mbps, and is converted into parallel 8-bit data by the S / P converter 130 of the talkie recording / reproducing apparatus 29. On the other hand, the CPU 30 gives a recording instruction to the control circuit 132 via the control highway. The control circuit 132
A read / write signal (R / W) is controlled for the memory 133 and data is written by controlling the buffer 131. At this time, the control circuit 132 sends a counter clear signal to the counter 36, and writes data from address 0 of the memory 133. When the final address FFFFFH of the memory 133 is reached, the control circuit 132
The read / write signal (R / W) for the memory 133 is controlled, and the buffer 131 is controlled to complete the data writing. When the recording ends, the control circuit 132 notifies the CPU 30 via the control highway. The CPU 30 controls the talkie recording / playback device 29 to PCM.
Disconnect from the highway.

When the above recording is completed, the talkie recording
The microprocessor 40 of the reproducing device 29 uses the program in the ROM 42 to search for a repeated portion of the talkie sound. Here, a method of detecting a repeated portion will be described with reference to FIG. As for the talkie voice, for example, as shown in "... Announces the forecast. First of all," unvoiced portions enter between voiced portions. In addition, silence becomes longer at the end of a sentence. Therefore, in the present embodiment, the length of a silent part and a sound part is detected, and a repeated part is extracted by searching for a place where a sound part with a sound part having the same length exists. FIG.
In the example, has the audio level has changed as shown in the figure, and t ₀ ~t ₁ portion and t _{n + 3} ~t _{n + 4} parts and is repeated portions. Then, the microprocessor 40 receives the interrupt signal INT from the control circuit 132 and searches from the last address of the memory 133 to the address 0. This is because recording at the last address is considered to be more stable than at the first address.
Then, the microprocessor 40 creates the table 50 of FIG. That is, since the PCM audio data has the same level of positive and negative polarities, only one polarity (for example, P ≧ 0) is searched. Then, the threshold value V _th between the sound part and the soundless part of the sound level is set in advance,
Judgment of sound and silence. In the silent part, the data below the threshold value V _{th corresponds} to a predetermined (several hundred) address (for example, 0.1 second).
When data is continuous, it is regarded as a silent section. And writes the starting address of the silent portion (point indicated by P _o), then detecting the talkspurt. The start address of the talkspurt is obtained by averaging the levels of predetermined (several hundred) addresses sequentially.
The first address (P) when the average exceeds the threshold _Vth
( Point indicated by ₁ ). In this manner, the same search is performed in the following manner, and the result is written in the table 50 repeatedly as a silent part → a sound part → a silent part. If the pointer in the table is an even number, it is a silent part, and if the pointer is an odd number, it is a sound part. Further, the table 50 also stores the address of the difference from the previous section. In this embodiment, for example, when sampling at 8 KHz, 1F40 (H) (8000 (D)) corresponds to one second. The microprocessor 40 searches and compares the difference with the table 50 created in this way, finds a section having the same difference with an error of, for example, ± 80 (D), and sets it as a repeated portion. In the example of FIG. 5, the difference between the addresses is FA0 (H) and FA1 at pointers P ₁ and P _{n + 4} .
(H) is almost equal. Hereinafter, P ₂ and P _{n + 5} , P ₃ and P
Compare with _{n + 6} , ... to confirm that it is a repeated part.
Then, a section having an address difference of about 10 seconds from the last address of the memory 133 is detected. Here, the memory point P ₀ is equivalent. The corresponding repeated portion is P _{n + 3} . Therefore, microprocessor 40
To confirm the memory address of the P ₀ of the memory address of the end address P _{n + 3} as the start address, I / O39
Load and set these addresses. FIG. 6 shows a search time chart of the above repetition part.
The counter 36 uses the start address and the end address output from the I / O 39 to repeat the counting of the addresses between them. During the search of the memory 133, the ready signal RDY is at the L level and the control circuit 132 does not accept the control.

Here, the threshold value V _th will be described in detail.
The PCM data according to the present embodiment is composed of 8 bits as shown in FIG. 7 and the companding characteristics in the case of the μ-law are as shown in FIG. 8, so that 8-bit PCM data represents data of 8159 stages. Therefore, for data exceeding the threshold value _Vth due to noise in the silent part, P001xxxx or P001
010xxxxxx and store it in the memory 133,
It is good to play as silence at the time of playback. Further, when the given threshold value V _th is too high or too low to properly detect the repetition of the silent portion and the sound portion, the threshold value V _th may be appropriately changed.

In the flowchart of FIG.
When branching to NO at 46, reproduction is performed (49). FIG. 9 shows a timing chart at the time of this reproduction. CP
Upon receiving a reproduction command from U30, the control circuit 132 controls the P / S converter 35 and the buffer 34 so that the data in the memory 133 is transmitted to the talkie recording / reproducing device 29 at a predetermined timing. . At this time, I / O
The ready signal RDY 39 is at the H level, the gate 37 is opened and the gate 38 is closed. And counter 36 is 125
The address from the start address to the end address is generated in response to the clock pulse PHFS of μs. Therefore, data is read at this speed, converted into serial data, and sent out to the PCM highway. The PCM highway data is time-division-converted by the time switch 31, and the extension telephone 19 dials the access code.
Given to. When the extension telephone 19 goes on-hook, the reproduction ends (60 in FIG. 3).

When the ready signal RDY is at the L level, the control circuit 132 does not accept the control. Therefore, the CPU 30, which has received the notification, returns a busy tone to the extension telephone 19 when the reproduction is necessary, Controls whether to connect to the line.

[0024]

As described above, according to the present invention, the talkie is recorded, reproduced and provided to the extension, so that the service charge burden on the user is reduced. In addition, since the talkie voice is converted when necessary, appropriate information can be provided. In addition, repeated playback is performed, which is advantageous in the case of hearing loss.

[Brief description of the drawings]

FIG. 1 is a block diagram according to an embodiment of the present invention.

FIG. 2 is a main part block diagram of one embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of one embodiment of the present invention.

FIG. 4 is a timing chart at the time of talking voice recording according to an embodiment of the present invention.

FIG. 5 is a diagram showing a talkie speech analysis process according to one embodiment of the present invention.

FIG. 6 is a timing chart at the time of searching for a repeated portion according to an embodiment of the present invention.

FIG. 7 is a diagram showing a format of audio data used in one embodiment of the present invention.

FIG. 8 is a view showing compression / expansion characteristics of audio data used in one embodiment of the present invention.

FIG. 9 is a timing chart when a talkie sound is reproduced according to an embodiment of the present invention.

FIG. 10 is a block diagram of a conventional electronic private branch exchange.

[Explanation of symbols]

 17 Electronic private branch exchange 18,22 Extension interface 19,21 Extension telephone 20,23 Central office trunk 30 CPU 31 Time switch 32 Billing device 36 Counter 40 Microprocessor 132 Control circuit 133 Memory

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 3/42-3/58 H04Q 3/58-3/62

Claims (4)

(57) [Claims] 1. A telephone system having an extension telephone and connected to an outside line, a recording / reproducing unit for recording and reproducing a talkie sound, and a talkie service for providing a talkie service from the extension telephone.
If there is a dial input to the source,
Make a call to the talkie service source or record / play back
Play the talkie sound recorded in the
A determining means based give or to machine the time information, it is determined to perform the reproduction more Torquay sound on the determination means
Then, the talkie sound recorded in the recording / playback unit is
Playback and control to give to the extension phone while calling
Is determined to be performed, the talker
Call to the service source and reach the talkie service source.
External line and the extension telephone and the recording / playback unit.
Pre-record the talkie sound coming from the talkie service source
A telephone system comprising control means for controlling recording on a sound / playback unit . 2. The apparatus according to claim 1, wherein said determination means includes a timer, and determines whether or not a predetermined dial input is made first in a predetermined time period based on said timer. The telephone system as described. 3. The control means according to claim 1, wherein after connecting the external line and the recording / reproducing unit, the connection is continued until a required time regardless of the on-hook of the extension telephone.
The telephone system as described. 4. A recording / reproducing unit is a memory in which digital data is stored, storage control means for digitizing a talkie voice and storing it in the memory, and a repeater of a talkie for data stored in the memory. The same voice address detection and holding means for detecting and holding the address of the data relating to the voice, and at the time of reproduction of the talkie voice, the data between the addresses detected by the same voice address detection and holding means in the memory is repeatedly read out and repeatedly reproduced. The telephone system according to any one of claims 1 to 3, further comprising means for performing repetitive playback.