KR101176404B1 - Automatic response system for voice recognition having local address grammar, and address recognition method using local address grammar - Google Patents

Abstract

PURPOSE: An automatic response system for voice recognition having a local address grammar and an address recognition method using the local address grammar are provided to perform voice recognition by searching address grammar of the corresponding area. CONSTITUTION: A local auto response server unit(200) determines a sub originating area of an incoming call. The local auto response server determines the area including the sub originating area using a local division rule database(202). The local auto response server applies the local address grammar corresponding the determined area in a local address grammar database(201). The local auto response sever performs address voice recognition about the address voicing sound which is received through a speech path.

Description

Automatic Response System for voice recognition having local address grammar, and address recognition method using local address grammar}

The present invention relates to a voice recognition automatic response system (ARS), and more particularly, to determine an area in which the customer is located based on the area code of the caller's number included in the incoming call or the area information input from the customer. After that, the present invention relates to a voice recognition automatic response system having an address address for each region that recognizes an address spoken by speech by applying a local address grapher corresponding to the region, and an address recognition method using an address address for each region.

In general, one of the important factors that determine the satisfaction of a customer's purchase of a product or service is customer-to-customer service such as an enterprise or a public office for resolving customer's AS and customer complaints and providing fast and prompt after-sales service. Recently, the automatic response system is to perform the window area dedicated to customer service.

Automated answering systems have evolved into third generation CTI automated answering systems (or "CTI call center systems"), combining telephones and computers, through the second generation, which relied on exchange and answering machine functions.

Automated answering system can reduce the cost of customer service processing in the enterprise, act as a branch office, obtain customer information quickly and efficiently, easily, and provide rapid service. It is developing.

Currently, CTI auto answering system that integrates both telephone and computer is the mainstream, and CTI auto answering system combines computer and telephone to distribute the incoming calls efficiently and to help the counselor to consult effectively. Information is grasped and provided in advance, and various additional functions are provided through a computer.

In addition, in order to further develop the CTI auto answering system, an auto answering system including a voice recognition function has been developed and applied to quickly recognize and process a customer's requirements. These voice recognition auto-response systems are applied to various fields, and are particularly applied to the field of automatic order reception, such as home shopping, which receives and manages the sales of goods and addresses to which the goods are delivered.

BACKGROUND ART Speech recognition automatic response systems, which are generally applied in the field of automatic order reception, include a plurality of speech recognition engines for recognizing speech spoken through a plurality of channels. In addition, the voice recognition engine applied to the automatic order receiving field performs voice recognition by referring to the address grammar optimized for address recognition in order to distinguish the address consisting of the longest sound among the order receipt information spoken by the customer. .

Normally, the grammar is intended to give meaning to the divided sounds, and the address grammar has grammar information defined for words and vocabulary for each region's address names for addresses in the country.

As described above, the voice recognition engine that needs to recognize the address through an automatic answering system, such as a conventional automatic order receiving field, has a national address grammar that includes words and vocabulary information to give meaning to all sounds of addresses in the country. By applying it, there is a problem that it takes a lot of time to complete the voice recognition because it must refer to all the information of the national address grammar when address recognition.

In addition, the conventional speech recognition engine performs speech recognition on addresses in the country by applying the national address grammar, so the speech recognition rate may be reduced due to a large amount of information search, and the number of address words and lexical information having similar sounds may increase. As a result, the voice recognition rate due to the similar address word and the lexical information may be reduced.

Accordingly, an object of the present invention is to determine the region where the customer is located by the area code of the calling number included in the incoming call or the area information input from the customer, and then voice the voice by applying a local address gramma corresponding to the area. It is to provide a voice recognition automatic response system having a local address grammar to recognize the address and an address recognition method using the address grammar for each region.

An automatic response system having a regional address grammar of the present invention for achieving the above object; A regional address grammar database that divides the whole country into a plurality of regions, and stores regional address grammars corresponding to addresses of the region for each region, and at least one sub-region that may belong to the region of each regional address grammar A region classification rule database for storing region classification rule information defining the data and a region classification rule database for determining the originating sub-region of the incoming call when a call is received, and determining the region including the sub-region by referring to the region classification rule database. After applying the region address gram corresponding to the determined region in the region-specific address grammar database, and includes a local automatic response server for performing the address voice recognition for the address speech sound of the customer received through the call path formed for the call Characterized in that.

The automatic response server unit determines an originating sub-region of an incoming call when a call is received, determines an area including the sub-region by referring to the region classification rule database, and determines a region including the sub-region by the region-specific address grammar database. A mutual voice response server for outputting a corresponding voice address corresponding to an address guide prompt to a call path formed for the call, and outputting the address voice sound received in response thereto; After the application of the local address grammar output from the voice response server, the voice address server is characterized in that it receives the voice address and the voice recognition of the address by the local address grammar.

The automatic response server unit detects the caller ID of the call when the call is received and determines the sub-region by the area code included in the caller ID.

The automatic response server detects the calling number of the call when the call is received, forms a call path if the detected calling number does not include the area code, and then provides the customer with a guide voice that induces local utterance. The sub-region may be determined by voice recognition of the local voice.

After answering the call, the automatic answering server forms a call path, provides a guide voice to guide the address utterance to the customer, and responds to the voice uttered from the voiced local voice.

The automatic response server unit receives a call from a plurality of customers, a call processing unit for performing a waiting process and a call forming process, a call number detection unit for detecting and outputting a call number of an incoming call connected to the call processing unit; Receives a voice prompt prompt to induce an address utterance according to the voice guidance unit for transmitting the voice guidance corresponding to the voice prompt prompt to the call through the call processing unit, and applies a local address grammar limited to any region And a voice recognition engine unit for recognizing and outputting an address voice of the customer input through the call path in response to the guide voice for inducing the address utterance for the call formed with the call processor. When the calling number is input from the calling number detecting unit, detects the area code of the calling number, Detecting an area including the area of the area code as a sub area by referring to the area classification rule database, and applying an area address gram corresponding to the detected area in the area address grama database to the voice recognition engine unit. And an interactive response server including a control unit for performing voice recognition.

The control unit, if the caller ID does not include an area code, forms a call path, and then provides a guide voice to guide the local voice to the customer through the voice guide unit, and voices the voice through the voice recognition engine unit. And receiving the voice recognition result of the local utterance sound determined as the sub-region as the voice recognition result.

The region is characterized in that it comprises at least two sub-regions which comprise, are included in or adjacent to the region.

Address recognition method applying the address address of the region of the present invention for achieving the above object; Area determination process for determining the area where the incoming call originated when a call is received, and a local address that applies a local address grammar having a limited area address grammar corresponding to the area to a voice recognition engine that performs voice recognition on the call. After the application of the grammar and the local address grammar, the voice guidance guides the voice to guide the address utterance to the call channel corresponding to the call, and in response, the address uttered by the customer. And an address recognition process of recognizing an address by performing voice recognition through the voice recognition engine to which the address grammar is applied.

The area determination process includes a sub-region determination step of determining a sub-region in which a call is sent when a call is received, and a region determination step of determining a region including the determined sub-region by referring to a region classification rule DB. It is done.

The determining of the sub area includes a calling number detection step of detecting a calling number included in the call, and a sub area determining step of detecting an area code of the detected calling number and determining the calling area as the sub area. It is done.

In the sub-area determination step, if there is no area code in the detected caller ID, a local voice utterance step of forming a call path for the call and transmitting a guide voice for inducing utterance of the calling area through the call path is performed. And a voice recognition step of voice recognition of local voices received in response to the announcement voice transmission, and a sub-region determination step of determining the voice recognition result of the voice recognition as a sub-region.

The determining of the sub-region may include: a local voice inducing step of transmitting a guide voice for inducing utterance of an originating area through the communication path after receiving a call path for the call; and receiving in response to the guide voice transmission. And a sub-region determination step of determining a sub-region by the voice recognition step of voice recognition of the voice of the local voice.

The region is characterized in that it comprises at least two sub-regions which comprise, are included in or adjacent to the region.

The present invention is provided with a plurality of region-specific address grammars defined for each region, and detects the origination number of the incoming call to determine the region, or recognizes the region spoken by the customer to determine the region, and corresponding to the determined region. Since the local address grammar is applied, the voice recognition can be performed by searching only the address grammar for the corresponding area, thereby reducing the voice recognition time.

In addition, the present invention is equipped with a regional address grammar, and by applying a local address grammar of a limited region corresponding to the recognized region, it is possible to minimize the false voice recognition by similar addresses of other regions, so the voice recognition for the address desired by the customer It has the effect of increasing the success rate.

In addition, the present invention can be applied to the region classification rule DB, even if they have different region name and region code, can be bound to the same region, and can apply the region address grammar corresponding to the bound region can flexibly operate the region address grammar Has an effect.

1 is a view showing the configuration of a communication system to which the automatic voice recognition system according to the present invention is applied.
2 is a diagram showing the configuration of an automatic voice recognition system having an address grammar for each region according to the first embodiment of the present invention.
3 is a diagram showing the detailed configuration of the IVR server of the auto-response server unit of the auto-response system having the address address grammar for each region according to the second embodiment of the present invention.
4 is a flowchart illustrating an address recognition method using an address grammar for each region of an automatic voice recognition system according to the present invention.

With reference to the drawings will be described the configuration and operation of the customer-selective automatic response system according to the present invention.

1 is a view showing the configuration of a communication system to which the automatic voice recognition system according to the present invention is applied.

The voice recognition automatic answering system of the present invention allows incoming calls from general landline telephones 111 through a general public telephone network 110, and a mobile communication terminal (130) through a mobile communication network 130 and a general public telephone network (110). A call sent from 131 is received, and a call is received from a wired / wireless computer terminal 121 through a wired / wireless internet network 120.

The wired / wireless computer terminal 121 may be a personal computer, a personal digital assistant (PDA), a laptop, or the like. The wired / wireless Internet terminal 120 transmits a call to the automatic answering system 100 through the Internet to make a call. You should have a phone call program that includes your phone number.

The mobile communication terminal 131 may be connected to a 2G and 3G terminal and a wired / wireless internet network 120 called a general mobile phone or a mobile phone, and may make a call to the voice recognition automatic response system 100 through the mobile communication network 130. 3G and 4G terminals, called phones.

Hereinafter, the term 'communication terminal' is used to refer to the wired telephone 111, the wired / wireless computer terminal 121, and the mobile communication terminal 131.

Voice recognition auto-response system 100 includes an address-specific database (DB) 201, a region classification rule DB (202), address information DB (203) and the auto-response server unit 200.

Region-specific address grammar DB 201 classifies the address grammar for the country by a specific region, and stores the region-specific address grammar defined words and vocabulary of the address name for each region address for each region. The region may be divided into provinces such as Seoul, Gyeonggi-do, Chungcheongnam-do, Chungcheongbuk-do, Gangwon-do, Jeollanam-do, Jeollabuk-do, Gyeongsangnam-do, Gyeongsangbuk-do, Jeju-do, etc., and Seoul, Incheon, Busan, Daejeon, Daegu, Ulsan, Gwangju, Gyeonggi-do, Chungcheongnam-do, It may be divided into national area code units such as Chungcheongbuk-do, Gangwon-do, Jeollanam-do, Jeollabuk-do, Gyeongsangnam-do, Gyeongsangbuk-do, and Jeju-do. In brief, the region may include at least two sub-regions that include, are included in, or adjacent to the region.

The zone classification rule DB 202 stores subdivisions including the location from which the input call originated and zone division rule information defining which of the zones the subdivisions belong to. The sub-region may be set in the same manner as the region, or may be divided into smaller regions. For example, if the region is divided into Seoul, Gyeonggi-do, Chungcheongbuk-do, Chungcheongnam-do, Gangwon-do, Jeollanam-do, Jeollabuk-do, Gyeongsangnam-do, Gyeongsangbuk-do, and Jeju-do, the sub-regions are the same as Seoul, Gyeonggi-do, Chungcheongbuk-do, Chungcheongnam-do, Gamwon-do, Jeolla-do, and Jeollabuk-do. , Gyeongsangnam-do, Gyeongsangbuk-do, and Jeju-do. As another example, the sub-region may be Seoul, Daejeon, Daegu, Incheon, Ulsan, Gwangju, Gyeonggi-do, Chungcheongnam-do, Chungcheongbuk-do, Gyeongsangbuk-do, Gyeongsangnam-do, Jeollabuk-do, Jeollanam-do, Jeju-do. In the latter case, since the number of sub-regions is larger, the sub-regions of Chungcheongnam-do and Daejeon may be mapped. In addition, the sub area may be registered with an area code instead of each area name, or the name and area may be registered together. For example, sub-regions include Seoul (02), Busan (051), Daegu (053), Incheon (032), Gwangju (062), Daejeon (042), Ulsan (052), Gyeonggi-do (031), and Gangwon-do (033). ), Chungcheongbuk-do (043), Chungcheongnam-do (041), Jeollabuk-do (063), Jeollanam-do (061), Gyeongsangbuk-do (054), Gyeongsangnam-do (055), and Jeju-do (064). In addition, the sub area may be a subway station name. In this case, the area classification rule DB 202 should define areas for each of the subway names.

The address information DB 203 maps and stores the voice-recognized address spoken by each customer with customer information.

The automatic response server unit 200 provides an automatic response service for receiving an address by voice, such as an automatic ordering system for automatic ordering after home shopping. The automatic response server unit 200 determines the sub-region of the origination position of the incoming call or the call path formed when the call is received, and determines which area the sub-region is by referring to the region classification rule DB 202. When the region is determined, the region address grammar DB 201 applies a region address grammar corresponding to the region, and recognizes and stores an address voice (or "address utterance") spoken by the customer. The region-specific address grammar may be applied after the address speech induction guidance voice corresponding to the address speech induction prompt according to a scenario. The sub-region determination of the origination location of the call may determine the sub-region by the area code if the area code is included in the originating number of the incoming call, and the terminal originating the call is the mobile communication terminal 131 or the computer terminal. In the case of 121, since the area code is not included in the calling number, the area should be input directly from the customer by voice. Specifically, the scenario induces the utterance of the originating region (sub-region) from which the customer originated the call, and the originating region utterance guidance prompt prompting to induce the utterance of the originating region should be added to the step, and the auto-response should be added. The server unit 200 transmits the guidance voice corresponding to the call origination location utterance guidance prompt according to the scenario in the step to the call channel formed for the call, and then when the customer speaks the calling area to the call path, It should be recognized and judged as a subregion. As described above, the originating region may be a region of a large city and a province such as Seoul, Busan, Ulsan, Gwangju, Daegu, Daejeon, Chungcheongbuk-do, and Chungcheongnam-do, or may be a subway station, city, county, or eup. .

2 is a diagram showing the configuration of an automatic voice recognition system having an address grammar for each region according to the first embodiment of the present invention.

The automatic response server unit 200 of the voice recognition automatic response system having the address address grammar for each region according to the first embodiment of the present invention is a private exchange 210 and an interactive voice response (IVR) server 220 and a voice. A case in which the recognition server 240 and the computer and telephony integration (CTI) server 250 are included is included.

The private exchange 210, the IVR server 220, the voice recognition server 240, and the CTI server are connected through a local network 260 to perform mutual data communication.

The private exchange 210 is connected to the general public telephone network 110 and / or wired and wireless Internet network 120 and a plurality of calls from the general landline telephone 111, mobile communication terminal 131 and wired and wireless computer terminals 121 Incoming calls are simultaneously received, and incoming calls are transferred to the IVR server 220.

IVR server 220 is provided with a plurality of voice channels connected to the private exchange 210 can receive a plurality of calls at the same time, by the waiting process of the incoming call, the detection of the call number of the incoming call and the formation of the call path Provides automatic response service according to scenario.

The voice recognition server 240 has a same voice channel as the voice channel of the IVR server and includes a plurality of voice recognition engines connected to each voice channel, and when the call is converted through the IVR server 240, the voice call is performed. The voice input through the voice recognition and output. In particular, the voice recognition server 240 receives the calling number from the IVR server 220, or receives the calling area voice by the calling area voice induction through the formed call path to recognize the voice to detect the calling area (sub area), The region corresponding to the detected originating region is found in the region classification rule DB 202, the region address corresponding to the found region is loaded into the region-specific grammar DB 201, and applied to the speech recognition engine. According to the address prompting guidance prompts are sent through the corresponding call path, and in response to the voice recognition by applying the local address grammar applied to the address voice sound received in response to the CTI server 250 Stored in the address information DB 203 via or directly. When the area code is included in the calling number, the IVR server 220 may be configured to determine the calling area.

2 illustrates a case where the auto-response server 200 includes a separate voice recognition server 240 that performs voice recognition. 3 illustrates the detailed configuration and operation when the automatic response server 200 is configured only with an IVR server including a voice recognition function without a separate voice recognition server.

3 is a diagram showing the detailed configuration of the mutual voice response server of the auto-response server unit of the auto-response system having the address address grammar for each region according to the second embodiment of the present invention.

Mutual voice response server 220 having an address address for each region according to the second embodiment of the present invention 220 is a control unit 221, call processing unit 222, call number detection unit 223, voice guide unit 224 and voice recognition engine Part 225 is included.

The controller 221 controls overall operations related to address speech recognition applying the address address grammar for each region according to the present invention. The operation of the controller 221 will be described in detail with reference to FIG. 4.

The call processing unit 222 has a plurality of voice channels connected to the private exchange 210 to receive a plurality of calls at the same time, and assigns the voice channel to the incoming calls under the control of the controller 221. If there is no voice channel available, a waiting line is formed. In addition, the call processor 222 detects whether a voice is input and outputs it to the controller 221.

The caller ID detector 223 detects the caller ID of the incoming call connected to the voice channel and outputs it to the controller 221.

Under the control of the controller 221, the voice guide 224 converts the guide prompts input according to the scenario into voice and transmits the voice to the call path of the corresponding call.

Speech recognition engine unit 225 is composed of a number corresponding to the channel of the call processing unit 222, if the voice is input in response to the transmission of the guided voice induced in accordance with the scenario to perform the speech recognition by applying the corresponding grammar The voice recognition result is output to the controller 221. In particular, each voice recognition engine of the voice recognition engine unit 225 transmits a guide voice corresponding to an address speech inducing prompt according to a scenario, and then controls the control unit 221 to correspond to the originating location that originated the incoming call. The address speech recognition is performed by applying the local address grammar and output to the controller 221.

4 is a flowchart illustrating an address recognition method using an address grammar for each region of an automatic voice recognition system according to the present invention. Hereinafter, a description will be given with reference to FIGS. 1 and 3 to 4.

First, the controller 221 checks whether a call is received through the call processor 222 (S411).

When the call is received, the controller 221 detects the calling number through the calling number detector 223 (S413) and stores the detected calling number (S415).

When the calling number is detected and stored, the control unit 221 checks whether the prompt sent out in the next step in the scenario to be provided through the voice guide unit 224 is an address speech inducing guidance prompt that induces the address speech of the customer (S417). ).

If the result of the test is not the address speech induction guidance prompt, the controller 221 applies the conventional grammar to the corresponding speech recognition engine of the speech recognition engine 225 to perform speech recognition (S419).

On the other hand, if the address utterance guidance prompts, the control unit 221 determines whether an area code exists in the detected calling number (S421), a mobile communication number or an Internet phone number without an area code (S423).

As a result of the determination, if the area code exists in the calling number, the controller 221 determines an area in which the area code is a sub area in the area classification rule DB 202 (S425).

When the region is determined, the controller 221 loads the region address grammar information corresponding to the region from the region-specific address grammar DB 201 and outputs it to the corresponding speech recognition engine of the speech recognition engine unit 225 ( S427).

After applying the local address grammar, the controller 221 transmits the guide voice corresponding to the address speech inducing prompt to the channel of the corresponding channel through the voice guide unit 224 (S429), and transmits the call processor 222. In response to the address speech induction guide voice through the call of the corresponding channel, it is checked whether an address speech sound is input (S431).

When the address speech is input, the corresponding speech recognition engine of the speech recognition engine unit 225 performs speech recognition by applying the corresponding region address graph of the region-specific grammar DB 201 and outputs the speech recognition result to the controller 221. something to do.

The controller 221 checks whether a voice recognized address is input from the voice recognition engine of the voice recognition engine unit 225 (S432), and stores the information in the address information DB 203 when the voice recognized address is input.

In FIG. 4, all of the method of determining an area by receiving the area code of the calling number and the calling area sound generated by the customer is applied, but only one of the two may be configured.

On the other hand, the present invention is not limited to the above-described typical preferred embodiment, it can be carried out in various ways without departing from the gist of the present invention various modifications, changes, substitutions or additions in the art Anyone who has this can easily understand it. If such improvement, change, substitution or addition is carried out within the scope of the appended claims, the technical spirit should also be regarded as belonging to the present invention.

100: automatic voice response system 110: general public telephone network
111: landline telephone 120: wired and wireless Internet
121: wired and wireless computer terminal 130: mobile communication network
131: mobile communication terminal 200: automatic response server unit
201: Region Address Grammar DB 202: Region Classification Rule DB
210: private exchange 220: voice address recognition device
221: control unit 222: call processing unit
223: caller ID detector 224: voice guide
225: speech recognition engine unit 240: speech recognition server

Claims (14)

A regional address grammar database that divides the whole country into multiple regions and stores regional address grammars corresponding to the address of the region by region;
A region classification rule database for storing region classification rule information defining at least one sub-region that may belong to the region of each region address grammar;
Determine the originating sub-region of the incoming call when the call is incoming, determine the region including the sub-region by referring to the region classification rule database, and determine the region address gramma corresponding to the determined region in the region-specific address grammar database. After the application, the voice recognition auto-response system having a local address grammar, characterized in that it comprises a local auto-response server for performing the address voice recognition for the address voice of the customer received through the call path formed for the call.
The method of claim 1,
The automatic response server unit,
Determine the originating sub-region of the incoming call when the call is incoming, determine the region including the sub-region by referring to the region classification rule database, and determine the region address gramma corresponding to the determined region in the region-specific address grammar database. A mutual voice response server for outputting a guide voice corresponding to an address guide prompt to a call path formed for the call, and outputting the address voice sound received in response thereto;
After applying the local address grammar output from the mutual voice response server, the voice having a local address grammar, characterized in that it comprises a voice recognition server that receives the address speech sound and recognizes the address by the local address grammar Recognition Automated Response System.
The method of claim 1,
The automatic response server unit detects the caller ID of the call when the call is received and determines the sub-region by the area code included in the caller ID.
The method of claim 3,
The automatic response server detects the calling number of the call when the call is received, forms a call path if the detected calling number does not include the area code, and then provides the customer with a guide voice that induces local utterance. Voice recognition automatic response system having a local address grammar, characterized in that for determining the sub-region by voice recognition of the local voice.
The method of claim 1,
After answering the call, the automatic response server forms a call path and provides a guide voice to guide the address utterance to the customer. Voice recognition automatic response system with address grammar.
The method of claim 1,
The automatic response server unit,
A call processing unit which receives a call from a plurality of customers and performs waiting processing and call formation;
A calling number detection unit for detecting and outputting a calling number of an incoming call connected to the call processing unit;
A voice guide prompt for receiving a voice prompt prompt for inducing address speech according to a scenario and transmitting a guide voice corresponding to the voice prompt prompt to the call through the call processor;
The address voice of the customer input through the call path is applied in response to the guidance voice for inducing the address utterance for the call formed with the call path connected to the call processing unit. A speech recognition engine unit for outputting speech recognition;
When the calling number is input from the calling number detector, the area code of the calling number is detected, the area including the area of the area code as a sub-area is detected by referring to the area classification rule database, And an inter-response server including a control unit configured to apply a local address grama corresponding to the detected area to the voice recognition engine unit to perform voice recognition.
The method of claim 6,
The control unit, if the caller ID does not include an area code, forms a call path, and then provides a guide voice to guide the local voice to the customer through the voice guide unit, and voices the voice through the voice recognition engine unit. The voice recognition automatic response system having an address address grammar according to the region, characterized in that the voice recognition result of the received local voice is determined as the sub-region as the voice recognition result.
8. The method according to any one of claims 1 to 7,
And the region includes at least two sub-regions including or included in the region or adjacent to the region.
Local decision process to determine the area where the incoming call originated when the call is received,
A process of applying a local address grammar having a local address grammar having a limited local address grammar corresponding to the area to a voice recognition engine that performs voice recognition for the call;
After applying the local address grammar, a voice guide to guide the address utterance is sent to the call corresponding to the call, and in response to the address utterance voiced by the customer the voice to which the local address grammar is applied An address recognition method using a local address grammar of the voice recognition automatic response system, characterized in that it comprises an address recognition process for performing the voice recognition through the recognition engine to recognize the address.
10. The method of claim 9,
The area determination process,
A sub-region determination step of determining a sub-region in which a call originated when a call is received;
And a region determination step of determining the region including the determined subregion by referring to a region classification rule DB.
The method of claim 10,
The determining step of the sub area,
A calling number detection step of detecting a calling number included in the call;
And a sub-region determination step of detecting the area code of the detected calling number and determining the sub-region as the sub-region.
The method of claim 11,
The sub-region determination step,
If there is no area code in the detected caller ID, after forming a call path for the call, local voice inducing step of transmitting a guide voice to induce the voice of the calling area through the call path;
A voice recognition step of voice recognition of local voices received in response to the announcement voice transmission;
And a sub-region determination step of determining the voice-recognized voice recognition result as a sub-region.
The method of claim 10,
The determining step of the sub area,
A local vocal induction step of transmitting a guide voice for inducing vocalization of an originating area through the telephone line after forming a call path for the call;
A voice recognition step of voice recognition of local voices received in response to the announcement voice transmission;
And a sub-region determination step of determining the voice-recognized speech recognition result as a sub-region.
10. The method of claim 9,
And said area comprises at least two sub-areas including or included in said area or adjacent said area.

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