JPWO2017200075A1 - Dialogue method, dialogue system, dialogue scenario generation method, dialogue scenario generation device, and program - Google Patents

Abstract

The dialog method performed by the dialog system includes an utterance generation step in which the dialog system generates an utterance, and the dialog system obfuscates at least a part of the utterance generated in the utterance generation step, and / or the utterance generation step generates Utterance decision step that obtains the utterance generated by replacing the word included in the utterance with a word that does not have the meaning of the word, and the dialogue system presents the utterance after conversion obtained by the utterance decision step An utterance presentation step.

Description

  The present invention relates to a technology in which a computer interacts with a human using a natural language, which can be applied to a robot that communicates with a human.

  In recent years, research and development of robots that communicate with people have progressed and have been put to practical use in various fields. For example, in the field of communication therapy, there is a usage form in which a robot is a conversation partner of a person who is lonely. Specifically, in a nursing home for the elderly, the robot can play a role of listening to the resident, so he can play a role in healing the loneliness of the resident and show a conversation with the robot. You can create conversation opportunities with the family and caregivers. Further, for example, there is a usage form in which a robot is a practice partner in a communication training field. Specifically, the foreign language learning can be efficiently advanced by having the robot become a practice partner of the foreign language learner at the foreign language learning facility. Also, for example, in application as an information presentation system, it is basic to let robots talk to each other, but by talking to people from time to time, people can participate in the conversation without being bored, and information that is easy for people to accept Can be presented. Specifically, news, product introductions, accumulation and knowledge when people have time to spend at meeting places in the city, bus stops, station platforms, etc., or when they can afford to participate in dialogues at home or in classrooms. Efficient information presentation such as introduction and education (for example, childcare and education for children, general education professor for adults, moral education, etc.) can be expected. Furthermore, for example, in application as an information collection system, there is a utilization form in which a robot collects information while talking to a person. Since communication can be maintained through communication with the robot, information can be collected without giving a sense of pressure that people are listening. Specifically, it is assumed to be applied to personal information surveys, market surveys, product evaluations, preference surveys for recommended products, and the like. As described above, various applications of human-robot communication are expected, and realization of a robot that can more naturally interact with users is expected. In addition, with the spread of smartphones, a chat service for enjoying conversations between users by chatting in almost real time with a plurality of users, such as LINE (registered trademark), has been implemented. If the technology of conversation between the user and the robot is applied to this chat service, it is possible to realize a chat service that allows conversation with the user more naturally even if there is no user as a chat partner. In this specification, the term “agent” is used to collectively refer to hardware used as a user's dialogue partner such as a robot or chat partner used in these services, or computer software for causing a computer to function as hardware as a user's dialogue partner. I will call it. Since the agent is a user's conversation partner, the agent may be anthropomorphic, personalized, or have personality or personality, such as a robot or chat partner.

  The key to the realization of these services is a technology that enables agents realized by hardware and computer software to naturally interact with humans.

  Non-Patent Documents 1 and 2 are known as conventional technologies of the dialogue system. In Non-Patent Document 1, an utterance is generated along a predetermined scenario. Further, in Non-Patent Document 1, an utterance that shows a conflict or an ambiguous answer, such as “Soka” or “Fun”, is generated regardless of a person's utterance. In Non-Patent Document 2, the next utterance is generated based only on the utterances of one or more previous persons or dialogue systems.

Arimoto Yasuhiro, Yoshikawa Yuichiro, Ishiguro Hiroshi, "Impression Evaluation of Dialogue Without Speech Recognition Using Multiple Robots", The Robotics Society of Japan, 2016 Sugiyama Hiroaki, Meguro Toyomi, Higashinaka Ryuichiro, Minami Yasuhiro, “Generation of Responses Using Dependency and Examples for User Utterances with Arbitrary Topics”, Transactions of the Japanese Society for Artificial Intelligence, 2015, 30 (1), 183- 194.

  Continuing dialogue between people and the dialogue system (i) mental health care, (ii) becoming entertainment, (iii) communication practice, (iv) increasing familiarity with the dialogue system, etc. The effect of can be obtained.

  However, if an utterance is generated according to a predetermined scenario as in Non-Patent Document 1, an unexpected question cannot be answered and the conversation does not continue. Further, in Non-Patent Document 1, the robot that asked the question only responds with an ambiguous response such as “Soka” in response to a human response. After prompting the person to speak like that, another robot utters a little off topic. This prevents people from feeling that their utterances have been ignored. However, if an ambiguous response such as “Soka” continues, people feel that they are being uttered and their conversation does not continue. If a response sentence is generated as in Non-Patent Document 2, it becomes 1 question 1 answer, and the conversation does not continue.

  The present invention relates to a dialogue method capable of increasing the number of turns of a dialogue by inserting a utterance to make a part of the utterance of the dialogue system once ambiguous and confirming the ambiguous part. It is an object to provide a dialogue system, a dialogue scenario generation method, a dialogue scenario generation device, and a program.

  In order to solve the above problem, according to one aspect of the present invention, a dialog method performed by a dialog system includes an utterance generation step in which the dialog system generates an utterance, and an utterance generated by the dialog system in the utterance generation step. Utterance decision step for obtaining as a post-conversion utterance an utterance generated by obscuring at least a part of the utterance or / and replacing a word included in the utterance generated by the utterance generation step with a word having no meaning of the word And an utterance presentation step in which the dialogue system presents the converted utterance obtained by the utterance determination step.

  In order to solve the above-mentioned problem, according to another aspect of the present invention, a dialogue method performed by the dialogue system is such that the dialogue system obfuscates at least a part of the predetermined utterance and / or the predetermined utterance. A first utterance presentation step of presenting a first utterance that is an utterance generated by replacing a word included in the word with a word having no meaning of the word, and after the dialogue system presents the first utterance, A second utterance presentation step of presenting a second utterance that is an utterance that can be read that the first utterance cannot be uniquely interpreted.

  In order to solve the above-mentioned problem, according to another aspect of the present invention, a dialogue method performed by the dialogue system is such that the dialogue system obfuscates at least a part of the predetermined utterance and / or the predetermined utterance. A first utterance presentation step of presenting a first utterance that is an utterance generated by replacing a word included in the word with a word having no meaning of the word, and after the dialogue system presents the first utterance, A second utterance presentation step of presenting a second utterance that is an utterance including a question for specifying the first utterance as one meaning.

  In order to solve the above problems, according to another aspect of the present invention, a dialogue method performed by a dialogue system is provided that the dialogue system has at least a partially obscured utterance, and / or no meaning. A first utterance presenting step for presenting an utterance including a word, and an utterance including a concrete content corresponding to an obfuscated part after the presentation by the first utterance presenting step, and / or meaning A second utterance presentation step of presenting an utterance including a word having a meaning corresponding to a part of the word not having the word.

  In order to solve the above-described problem, according to another aspect of the present invention, in the dialog scenario generation method, the dialog scenario generation device generates a dialog scenario used for a dialog performed by the dialog system. In a dialogue scenario generation method, a dialogue scenario generation device obfuscates at least a part of a predetermined utterance and / or replaces a word included in the predetermined utterance with a word having no meaning of the word Including a first utterance that is an uttered utterance, and a second utterance that is an utterance that is presented after the first utterance is presented and that can be read that the first utterance cannot be uniquely interpreted Generate a scenario.

  In order to solve the above-described problem, according to another aspect of the present invention, in the dialog scenario generation method, the dialog scenario generation device generates a dialog scenario used for a dialog performed by the dialog system. In a dialogue scenario generation method, a dialogue scenario generation device obfuscates at least a part of a predetermined utterance and / or replaces a word included in the predetermined utterance with a word having no meaning of the word A first utterance that is an utterance and a second utterance that is an utterance that is presented after the first utterance is presented and that includes a question for identifying the first utterance as one meaning, Generate an interactive scenario that includes

  In order to solve the above-described problem, according to another aspect of the present invention, in the dialog scenario generation method, the dialog scenario generation device generates a dialog scenario used for a dialog performed by the dialog system. In the dialogue scenario generation method, the dialogue scenario generation device presents a first utterance and a first utterance that are at least partially obscured utterances and / or utterances that include meaningless words. A second utterance that is an utterance that is presented later and that includes a specific content corresponding to the obfuscated part, and / or an utterance that includes a word that has a meaning corresponding to a part of a word that has no meaning And generate an interactive scenario.

  In order to solve the above problems, according to another aspect of the present invention, an interactive system obfuscates an utterance generation unit that generates an utterance and at least a part of the utterances generated by the utterance generation unit. And an utterance determination unit that obtains an utterance generated by replacing a word included in the utterance generated in the utterance generation step with a word having no meaning of the word, and a post-conversion utterance obtained by the utterance determination unit And an utterance presentation unit for presenting.

  In order to solve the above problems, according to another aspect of the present invention, the dialogue system obfuscates at least a part of a predetermined utterance and / or changes a word included in the predetermined utterance to the word. The first utterance presenting unit that presents the first utterance that is an utterance generated by replacing the word with no meaning, and the first utterance cannot be uniquely interpreted after presenting the first utterance A second utterance presentation unit that presents a second utterance that is a readable utterance.

  In order to solve the above problems, according to another aspect of the present invention, the dialogue system obfuscates at least a part of a predetermined utterance and / or changes a word included in the predetermined utterance to the word. A first utterance presenting unit that presents a first utterance that is an utterance generated by replacing words that have no meaning, and a first utterance after specifying the first utterance in one meaning A second utterance presentation unit that presents a second utterance that is an utterance including the question.

  In order to solve the above problems, according to another aspect of the present invention, a dialogue system presented an utterance that is at least partially obfuscated, and / or includes an utterance that has no meaning. A presentation unit for presenting an utterance including specific content corresponding to the obfuscated part and / or an utterance including a word having a meaning corresponding to a part of a word having no meaning is included.

  In order to solve the above-described problem, according to another aspect of the present invention, a dialog scenario generation device generates a dialog scenario used for a dialog performed by a dialog system. The dialogue scenario generation device is a first utterance generated by obscuring at least a part of a predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word. And a second utterance that is an utterance that is presented after the first utterance is presented and that can be read that the first utterance cannot be uniquely interpreted is generated.

  In order to solve the above-described problem, according to another aspect of the present invention, a dialog scenario generation device generates a dialog scenario used for a dialog performed by a dialog system. The dialogue scenario generation device is a first utterance generated by obscuring at least a part of a predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word. And a second utterance which is an utterance to be presented after presenting the first utterance and including a question for specifying the first utterance as one meaning is generated. .

  In order to solve the above-described problem, according to another aspect of the present invention, a dialog scenario generation device generates a dialog scenario used for a dialog performed by a dialog system. The dialogue scenario generation device includes a first utterance that is an utterance that is at least partially obfuscated, and / or an utterance that includes a meaningless word, and an utterance that is presented after the first utterance is presented , An utterance containing specific content corresponding to the obfuscated part, and / or a second utterance containing an utterance containing a word having a meaning corresponding to an insignificant word part. Is generated.

  According to the present invention, it is possible to increase the number of dialogue turns.

The functional block diagram of the dialogue system which concerns on 1st embodiment. The figure which shows the example of the processing flow of the dialogue system which concerns on 1st embodiment. The functional block diagram of the dialogue system which concerns on 2nd embodiment. The figure which shows the example of the processing flow of the dialogue system which concerns on 2nd embodiment. The functional block diagram of the dialogue system which concerns on 3rd embodiment. The figure which shows the example of the processing flow of the dialogue system which concerns on 3rd embodiment. The figure which shows the dialogue system which concerns on the modification 3.

  Hereinafter, embodiments of the present invention will be described. In the drawings used for the following description, constituent parts having the same function and steps for performing the same process are denoted by the same reference numerals, and redundant description is omitted.

<Points of Embodiment of the Present Invention>
In the embodiment of the present invention, an utterance sentence (original utterance sentence) generated by the dialog system is directly uttered in an interactive system that interacts with a user and includes a plurality of robots R1 and R2. Rather than obscure at least a part of the original utterance, and / or a sentence generated by replacing a word included in the original utterance with a word that does not have the meaning of the word (hereinafter, Sentences generated by these methods are also converted to “obfuscated sentences”, and a robot is uttered by the converted sentences. Then, after that, another robot utters a sentence expressing that it cannot be uniquely interpreted, and / or a robot that uttered an obfuscated sentence utters (rephrases) the original utterance sentence. When an utterance expressing that the robot cannot be interpreted uniquely, the user can read from the utterance that the robot cannot be interpreted uniquely. That is, the sentence expressing that it cannot be interpreted uniquely is a sentence that can be read that it cannot be interpreted uniquely. In this way, it is possible to increase the number of utterances of the robot that gives a sense of satisfaction to the user without increasing the number of utterances generated by the dialogue system, and as a result, the number of dialogue turns between the user and the dialogue system can be increased. The ambiguous sentence is, for example, (i) a sentence in which a part of the original utterance sentence is replaced with an instruction word, (ii) a sentence in which an incorrect word is replaced, or (iii) a sentence that is omitted. (I) In the case of a sentence replaced with a directive, that is, when a sentence in which a part of the original utterance is replaced with a directive without presenting the original utterance, what is the directive Is interpreted as two or more meanings. (ii) In the case of a sentence that has been replaced with the wrong word, i.e., when a sentence that has been partially replaced with the wrong word is presented without presenting the original utterance, at least ( Considering the context before and after, it is interpreted in two meanings: a sentence that can be interpreted in its original meaning without mistakes, and (b) a sentence that is replaced with the wrong words. Note that if the wrong word is too different from the original word, the dialogue will be affected. As shown below, the sound is similar, such as a word that has a meaning different from the original word. It is desirable to say a word and use it as a wrong word. (iii) In the case of an abbreviated sentence, that is, when a sentence in which a part of the original utterance sentence is omitted without presenting the original utterance sentence, 2 Interpreted to more than one meaning. Hereinafter, examples of the original utterance sentence and the converted utterance sentence are shown.
Original utterance: “Car, fuel consumption is important.”
(i) Sentences replaced with directives: “That”, fuel consumption is important.
(ii) Sentence replaced with the wrong word: “Kurumi”, fuel efficiency is important.
(iii) Omitted sentence: “'Omitted' fuel economy is important.”

  In order to increase the number of dialogue turns, in the dialogue system according to the present embodiment, an utterance sentence generated to make a certain robot R1 speak is converted into an obfuscated sentence, and the robot R1 utters the obfuscated sentence. . Then, after the utterance of the ambiguous sentence by the robot R1, another robot R2 utters an utterance sentence that confirms the content of the obfuscated sentence. However, when only the robot R1 is included in the dialogue system, after the utterance of the ambiguous sentence by the robot R1, the utterance sentence that confirms the content of the ambiguous sentence may be uttered by the robot R1 itself.

  Note that an obscured sentence utterance may be inserted at any timing during the dialogue between the user and the dialogue system, but care must be taken so that the dialogue does not become too long. Even if the original utterance is uttered as it is, it is particularly effective to insert an obscured sentence utterance when it is determined that the user does not understand the robot's utterance or is difficult to empathize with it. For example, (A) when the dialog system changes the topic (eg, starts a scenario dialog), (B) when the user's response to the dialog system utterance deviates from the dialog system's expected response (C) When the conversation system detects a change in topic, it is better to let the robot utter an ambiguous sentence. As a method of detecting changes in the topic, the dialog system uses, for example, a sentence or word in conversation, (a) the distance between topic words using word2vec, and (b) the average word over the word2vec. (C) If the distance is greater than or equal to a predetermined value or if the cos similarity is less than or equal to a predetermined value (in short, two utterances are related) There is a method for determining that the topic has changed (if the predetermined index indicates that the relationship between the two utterances is not high). The timings (A) to (C) described above are timings at which it becomes difficult for the user to understand the utterance contents of the dialogue system, so that the robot R1 utters an ambiguous sentence and the robot R1 and the robot R2 By inserting the dialogue between them, it is possible to increase the number of dialogue turns between the person and the dialogue system and to encourage the person to understand the utterance contents of the dialogue system.

  As described above, the target words when converting the original utterance sentence to (i) the sentence replaced with the instruction word, (ii) the sentence replaced with the wrong word, and (iii) the omitted sentence. There are no particular limitations on the word, the word to be mistaken, and the word to be omitted, but for example, the main word is the target. For example, based on tf-idf (weight for a word in a document), a word with a higher weight among words included in the original utterance may be selected as a target word. Moreover, you may select the word used as a high-order concept as a target word among the words contained in the original speech sentence in relation to another word. For example, in the case where “sedan” and “car” are included in the original utterance sentence, the word “car” as a superordinate concept can be selected as the target word in relation to the word “sedan”.

  An example of dialogue is shown below. In the following dialogue example, it is assumed that utterances t (1), utterances t (2),. X → Y means that the utterance is made from X to Y, and indicates an instruction word, a wrong word, or an omission in “”.

(Example 1: Indicator)
Utterance t (1): Robot R1 → Robot R2: I like “that”, sedan. Utterance t (2): Robot R2 → Robot R1: Is that a car story?
Utterance t (3): Robot R1 → Robot R2: Yes, car. I like cars, sedans, right?

(Example 2: omitted)
Utterance t (1): Robot R1 → Robot R2: I like “omitted” sedans. Utterance t (2): Robot R2 → Robot R1: What is that story?
Utterance t (3): Robot R1 → Robot R2: Yeah, car. I like cars, sedans, right?

(Example 3: Misspoken)
Utterance t (1): Robot R1 → Robot R2: I like “Kurumi”, sedan. Utterance t (2): Robot R2 → Robot R1: What are you talking about?
Utterance t (3): Robot R1 → Robot R2: Sorry, car. I like cars, sedans, right?

  In Examples 1 to 3, the utterance performed by the dialogue system immediately after the obscured utterance t (1) (in this example, the utterance t (2) of the robot R2) is the first utterance t that is an obscured utterance. This is an utterance containing a word that identifies the obfuscated part of (1) as one meaning. However, the utterances made by the dialogue system immediately after the obscured utterance t (1) are not limited to such utterances, and the utterances that indicate that they cannot be interpreted uniquely, that is, they cannot be interpreted uniquely. Can be read, for example, the following utterance may be used.

(Example 4: Misspoken)
Utterance t (1): Robot R1 → Robot R2: I like “Kurumi”, sedan. Utterance t (2): Robot R2 → Robot R1: I ’m sorry, I do n’t understand.
Utterance t (3): Robot R1 → Robot R2: Sorry, car. I like cars, sedans, right?

  In this example, the utterance “I'm sorry, I don't understand the meaning” of the robot R2 includes a word that identifies the obfuscated part of the first utterance t (1), which is an obscured utterance, as one meaning. Although it is not an utterance, it is an utterance that makes it necessary for the robot R1, which is the robot that made the utterance t (2) of the robot R2, to speak a word that identifies the obscured utterance. . The utterance t (2) performed by the dialogue system immediately after the obscured utterance t (1) in Examples 1 to 4 can be summarized as an utterance that expresses that it cannot be uniquely interpreted. It can be said that it is an utterance that can be read that it cannot be interpreted uniquely, and in other words, it can be said to be an utterance that causes a utterance including a word specified in one meaning.

  In addition, although the example of the above-mentioned dialogue describes to whom the utterance is performed, it is not necessary to limit to whom the utterance is performed. For example, Example 1 is an interaction between the robot R1 and the robot R2, but may be an interaction between the robot R1, the robot R2, and a person. In order to limit to whom the utterance is performed, for example, it is only necessary to indicate who the utterance target is based on the movement of the robot's head or line of sight.

<First embodiment>
FIG. 1 is a functional block diagram of the interactive system 100 according to the first embodiment, and FIG. 2 shows a processing flow of the interactive system 100 according to the first embodiment.

  The dialogue system 100 includes robots R1 and R2 and a dialogue device 190. The dialogue device 190 includes a speech synthesis unit 110, an utterance generation unit 150, and an utterance determination unit 120. The robot R1 includes a presentation unit 101-1, and the robot R2 includes a presentation unit 101-2. The presentation units 101-1 and 101-2 emit acoustic signals around the robots R1 and R2, for example, speakers.

  The dialogue system 100 is for a user being a dialogue with two robots R1 and R2, and the robots R1 and R2 speak the speech (synthetic speech data) generated by the dialogue device 190. It is. Hereinafter, the flow of operations performed by the interactive system 100 will be described.

  The utterance generation unit 150 generates an utterance sentence (text data) (S1) and outputs the utterance sentence (text data) to the utterance determination unit 120 and the speech synthesis unit 110. Hereinafter, this utterance sentence is also called an original utterance sentence. In the utterance generation unit 150, for example, as in the dialogue system called “chat dialogue system” described in Non-Patent Document 2, the text of the utterance is input according to the rules described in advance using the input word as a trigger. An interactive system that generates and outputs a message is provided. The dialogue system provided in the utterance generation unit 150 generates and outputs an original utterance sentence based on a preset word.

  Alternatively, in the utterance generation unit 150, for example, a scenario in which words set in advance are stored in advance in the dialogue system as in a dialogue system called “scenario dialogue system” described in Non-Patent Document 1. In the case of corresponding to an option, there is provided an interactive system for selecting and outputting an utterance text stored in advance corresponding to the option. The dialogue system provided in the utterance generation unit 150 selects and outputs an original utterance sentence from texts stored in advance. Here, the example in which the original utterance is generated based on the word set in advance has been described, but the word may not be set in advance. For example, when the original utterance generation time is one of ongoing conversations, a word (topic, etc.) in the dialog before the original utterance generation time may be used instead of the preset word. .

  The utterance determination unit 120 receives the original utterance sentence input from the utterance generation part 150, and obtains the utterance sentence generated by obscuring at least a part of the original utterance sentence as a converted utterance sentence (text data) (S2). ) And output to the speech synthesizer 110. Note that (i) the process of replacing at least part of the utterance sentence with the instruction word, (ii) the process of replacing with the wrong word, or (iii) the process of omitting obscures the utterance sentence. It corresponds to. Note that the process of saying at least a part of an uttered sentence and replacing it with an incorrect word can be said to be a process of replacing a word included in the uttered sentence with a word having no meaning of the word.

  The speech synthesis unit 110 performs speech synthesis on the converted utterance (text data) input from the utterance determination unit 120 to obtain synthesized speech data (S3), and presents the obtained synthesized speech data to the robot R1. To the unit 101-1.

  The presentation unit 101-1 reproduces the voice corresponding to the synthesized voice data of the converted utterance sentence input from the voice synthesizer 110, that is, presents the converted utterance sentence as the utterance of the robot R1 (S4). When the robot itself that has reproduced the voice corresponding to the synthesized speech data of the converted speech sentence is used as the presentation destination of the synthesized speech data, the processing may be performed as if speaking alone.

  The utterance generation unit 150 generates an utterance sentence (hereinafter, also referred to as “confirmed utterance sentence”) for confirming the content of the converted utterance sentence input from the utterance determination unit 120 (S6), and outputs the utterance sentence to the speech synthesis unit 110. . The confirmation utterance sentence includes a question for specifying the converted utterance sentence as one meaning.

  Confirmation utterances include, for example, (i) an utterance sentence that identifies and confirms the correct contents, (ii) an utterance sentence that confirms without identifying any contents, and (iii) identifies and confirms incorrect contents Is an utterance sentence. For example, (i) As an utterance sentence that identifies and confirms the correct content, “That is XX?” (Here, XX is the correct content, and the word that specifies the converted utterance sentence as one meaning) (Ii) As an utterance sentence to be confirmed without specifying any contents, an utterance sentence as "What?", (Iii) An utterance to identify and confirm wrong contents As the sentence, there may be utterances such as “That is YY?” “YY?” “What is YY?” (YY is wrong here). How the utterance generation unit 150 specifically generates the type of confirmation utterance sentence (i) to (iii) may be determined in advance in the utterance generation unit 150, or the utterance generation unit The operator of the dialogue system may be designated from outside 150. Also, the correct content is based on the original utterance sentence generated by the utterance generation section 150 and the post-conversion utterance sentence generated by the utterance determination section 120, and the word corresponding to the obscured part of the utterance determination section 120 is the original utterance sentence Determine by obtaining from. The incorrect content is based on the original utterance sentence generated by the utterance generation section 150 and the post-conversion utterance sentence generated by the utterance determination section 120 from the original utterance sentence. What is necessary is just to acquire and produce | generate based on the acquired word. The confirmation utterance includes a question for specifying the converted utterance with one meaning, but does not specify the converted utterance with one meaning.

  The speech synthesizer 110 performs speech synthesis on the confirmed utterance sentence input from the utterance generator 150 to obtain synthesized speech data (S7), and sends the obtained synthesized speech data to the presentation unit 101-2 of the robot R2. Output.

  The presentation unit 101-2 reproduces the voice corresponding to the synthesized speech data of the confirmation utterance input from the speech synthesizer 110, that is, presents the confirmation utterance as the utterance of the robot R2 (S8).

  The utterance generation unit 150 further generates an utterance sentence (hereinafter also referred to as “response utterance sentence”) in response to the confirmation utterance sentence, and outputs the utterance sentence to the speech synthesis unit 110 (S9). The response utterance is an answer to a question included in the confirmation utterance and includes a word that specifies the converted utterance as one meaning.

  The speech synthesizer 110 performs speech synthesis on the response utterance sentence input from the utterance generator 150 to obtain synthesized speech data (S10), and sends the obtained synthesized speech data to the presentation unit 101-1 of the robot R1. Output. If the confirmation utterance is (i) an utterance that identifies and confirms the correct content, the response utterance is an utterance that repeats the correct content after confirming the confirmation content, For example, “Yeah, XX”. If the confirmation utterance is (ii) an utterance that confirms without identifying any content, or (iii) an utterance that identifies and confirms the wrong content, the response utterance is correct. An utterance sentence for confirming the contents, for example, “XX”.

  The presentation unit 101-1 reproduces the voice corresponding to the synthesized voice data of the response utterance text input from the voice synthesizer 110, that is, presents the response utterance text as the utterance of the robot R1 (S11).

  The speech synthesizer 110 performs speech synthesis on the original utterance sentence input from the utterance generator 150 to obtain synthesized speech data (S12), and the obtained synthesized speech data is sent to the presentation unit 101-1 of the robot R1. Output.

  The presentation unit 101-1 reproduces the voice corresponding to the synthesized voice data of the original utterance sentence input from the voice synthesizer 110, that is, presents the original utterance sentence as the utterance of the robot R1 (S13).

<About processing of each part>
Below, it demonstrates centering around the process of each part of the dialogue system 100. FIG. Here, an example is shown in which speech synthesis of each utterance is performed before the start of the dialogue.

[Robots R1, R2]
The robots R <b> 1 and R <b> 2 are for interacting with the user, are placed near the user, and perform utterances generated by the dialog device 190.

[Speech generator 150]
The utterance generation unit 150 generates an original utterance sentence and outputs it to the utterance determination unit 120 and the speech synthesis unit 110.

  Further, the utterance generation unit 150 uses the converted utterance sentence and the original utterance sentence obtained by the utterance determination section 120 to obtain an obscured part, and a confirmation utterance for confirming the obscured part. A sentence is generated and output to the speech synthesizer 110. The part of the utterance determination unit 120 that is obscured can be obtained from the difference between the converted utterance and the original utterance. In addition, it is good also as a structure which receives the information which shows the part obscure from the speech determination part 120. FIG.

  Furthermore, the utterance generation unit 150 generates a response utterance sentence for the confirmation utterance sentence, and outputs the response utterance sentence to the speech synthesis unit 110.

  When the original utterance sentence, the confirmation utterance sentence, and the response utterance sentence are output to the speech synthesizer 110, information indicating the utterance order is added to each utterance sentence and output. For example, the utterance order of the confirmation utterance sentence is N + 2, the utterance order of the response utterance sentence is N + 3, and the utterance order of the original utterance sentence is N + 4. N is any integer of 0 or more. The utterance order of the confirmation utterance sentence, the response utterance sentence, and the original utterance sentence does not need to be continuous, but the order is not changed. The utterance generation unit 150 may also determine a robot that utters a confirmation utterance sentence, a response utterance sentence, and an original utterance sentence. In this case, information representing the uttering robot is also output to the speech synthesizer 110.

[Speech determination unit 120]
The utterance determination unit 120 receives the original utterance sentence generated by the utterance generation part 150, obtains an utterance sentence generated by obscuring at least a part of the original utterance sentence, and outputs it to the speech synthesizer 110. To do. Further, the utterance determination unit 120 outputs information indicating the converted utterance sentence or the ambiguous part to the utterance generation unit 150.

  When the converted utterance is output to the speech synthesizer 110, information indicating the utterance order is added to the converted utterance and output. The utterance order of the converted utterance is, for example, N + 1, and is before the confirmation utterance, the response utterance, and the original utterance. The utterance determination unit 120 may also determine a robot that utters the converted utterance sentence. In this case, information representing the uttered robot is also output to the speech synthesis unit 110.

[Speech synthesizer 110]
The speech synthesis unit 110 performs speech synthesis on the confirmation utterance sentence, the response utterance sentence, the original utterance sentence, and the converted utterance sentence input from the utterance determination part 120, which are input from the utterance generation unit 150, and the synthesized speech data And the obtained synthesized voice data is output to the presentation unit 101-1 of the robot R1 or the presentation unit 101-2 of the robot R2. The utterance determination unit 120 outputs the synthesized voice data according to the information indicating the utterance order. Therefore, in this embodiment, the synthesized speech data is output in the order of the converted utterance sentence, the confirmation utterance sentence, the response utterance sentence, and the original utterance sentence. When information representing a robot that utters the utterance sentence is input together with the utterance sentence from the utterance determination section 120, the synthesized voice data is output to the presentation section of the robot corresponding to the information.

[Presentation sections 101-1 and 101-2]
Presentation units 101-1 and 101-2 reproduce voice corresponding to the synthesized voice data input from voice synthesis unit 110. As a result, the user listens to the speech of the robot R1 or R2, and the dialogue between the user and the dialogue system 100 is realized.

<Effect>
With the above configuration, the number of dialogue turns can be increased.

  In a conversation between a dialogue system and a person, the utterance of the dialogue system may be interpreted as a context beyond human prediction and empathy. For example, there is a case where the utterance of the dialogue system is sudden and suddenly the utterance intention cannot be understood. In the present embodiment, a part of a sentence is once made ambiguous, and an utterance for performing a dialog for confirming the ambiguity is inserted into another robot. When the dialogue system inserts such an utterance, a person can easily understand the intention of the dialogue system.

<Second embodiment>
FIG. 3 shows a functional block diagram of the interactive system 100 according to the second embodiment, and FIG. 4 shows a processing flow of the interactive system 100 according to the second embodiment.

  Similar to the interactive system 100 of the first embodiment, the interactive system 100 of the second embodiment includes robots R1 and R2 and an interactive device 190. The interaction device 190 of the second embodiment is different from the interaction device 190 of the first embodiment in that it also includes an utterance end detection unit 140. The robot R1 of the second embodiment differs from the robot R1 of the first embodiment in that it also includes an input unit 102-1, and the robot R2 of the second embodiment is different from the robot R2 of the first embodiment. The input unit 102-2 is also included. The input units 102-1 and 102-2 collect sound signals generated around the robot, and are microphones, for example. Since the input unit only needs to be able to pick up speech uttered by the user, the input unit may not include any one of the input units 102-1 and 102-2. Further, a microphone installed in a place different from the robots R1 and R2 such as the vicinity of the user may be used as the input unit, and the input units 102-1 and 102-2 may not be provided.

  Hereinafter, the flow of operations performed by the interactive system 100 of the second embodiment will be described focusing on differences from the flow of operations performed by the interactive system 100 of the first embodiment.

  First, the interactive system 100 according to the second embodiment performs steps S1 to S4.

  After the post-conversion utterance text is presented in step S4, the voice data corresponding to the user utterance collected by at least one of the input units 102-1 and 102-2 is output to the utterance end detection unit 140.

  The utterance end detection unit 140 detects the end of the user's utterance using the acquired voice data collected from at least one of the input units 102-1 and 102-2, or there is no user's utterance. It is detected that a predetermined time has passed, that is, a time-out has occurred (S5), and a control signal notifying the utterance generation unit 150 of the end of the utterance or the time-out is output.

  When the control signal from the utterance end detection unit 140 is input to the utterance generation unit 150, the interactive system 100 according to the second embodiment performs steps S6 to S13.

  That is, in this embodiment, although the time for the user to utter after providing the converted utterance is provided, the dialog system 100 does not recognize the user's utterance and the user's utterance ends, or When a predetermined time has elapsed, a confirmation utterance is presented. It should be noted that the confirmation utterance sentence and the response utterance sentence presented by the dialog system 100 are the above (i), whether the user utterance contents include the correct contents of the ambiguous part or the incorrect contents. ). For example, the dialogue system 100 presents “That is XX?” As a confirmation utterance and “Yeah, XX” as a response utterance.

In the following, an example of dialogue in the present embodiment is shown below.
(Example 5)
Utterance t (1): Robot R1 → User: “That”, what type do you like?
Utterance t (2): User → Robot R1: Eh, what?
Utterance t (3): Robot R2 → Robot R1: Is that a car story?
Utterance t (4): Robot R1 → Robot R2: Yes, car. What type of car do you like?
In Example 5, the robot R1 utters the post-conversion utterance t (1), and the robot R1 utters the post-conversion utterance t (1). When the user's utterance t (2) is completed, the robot R2 utters a confirmation utterance t (3). Next, the robot R1 utters a response utterance and an original utterance as utterance t (4).

  In this embodiment, since the confirmation utterance sentence and the response utterance sentence presented by the dialogue system 100 do not depend on the user's utterance content, the dialogue system 100 of this embodiment does not have to have a voice recognition function.

<Third embodiment>
FIG. 5 is a functional block diagram of the dialogue system 100 according to the third embodiment, and FIG. 6 shows a processing flow of the dialogue system 100 according to the third embodiment.

  Similar to the interactive system 100 of the second embodiment, the interactive system 100 of the third embodiment includes robots R1 and R2 and an interactive device 190. The interaction device 190 of the third embodiment is different from the interaction device 190 of the second embodiment in that it does not include the utterance end detection unit 140 but includes the voice recognition unit 141.

  Hereinafter, the flow of operations performed by the interactive system 100 according to the third embodiment will be described focusing on differences from the flow of operations performed by the interactive system 100 according to the second embodiment.

  First, the interactive system 100 according to the third embodiment performs steps S1 to S4.

  After the post-conversion utterance sentence is presented in step S4, the voice data corresponding to the user's utterance collected by at least one of the input units 102-1 and 102-2 is output to the voice recognition unit 141.

  The voice recognition unit 141 recognizes voice data collected from at least one of the input units 102-1 and 102-2, and obtains an utterance sentence (utterance sentence corresponding to the user's utterance) as a voice recognition result. (S51), the utterance sentence of the speech recognition result is output to the utterance generation unit 150.

  The utterance generation unit 150 determines whether or not the utterance sentence of the speech recognition result has the same content as the generated confirmation utterance sentence (S52), and the same content as the confirmation utterance sentence generated by the utterance sentence of the speech recognition result. In such a case, the dialog system 100 of the third embodiment does not perform steps S6 to S8, but performs steps S9 to S13, and the speech sentence of the speech recognition result is not the same content as the confirmation utterance sentence generated. In that case, the interactive system 100 according to the third embodiment performs steps S6 to S13. That is, when the user utters an utterance sentence that confirms the content of the ambiguous sentence, the dialog system 100 of the third embodiment does not utter an utterance sentence that confirms the content of the ambiguous sentence, and the user's Speak response utterance after utterance.

  In this embodiment, the example in which the user's utterance is received after the post-conversion utterance sentence is presented by the dialogue system 100 has been described. However, the user's utterance may be accepted after any utterance sentence is presented by the dialogue system 100. In addition, the utterance of the user other than the utterance that the dialogue system 100 assumed in advance, such as the case where the utterance of the speech recognition result of the user's utterance after presentation of the converted utterance is not the same as the generated confirmation utterance A case where an utterance is performed will be described. In such a case, the dialogue system 100 may utter an utterance sentence that is not any of the confirmation utterance sentence, the response utterance sentence, and the original utterance sentence described in the first embodiment. For example, the utterance generation unit 100 sets “Yes, XX” as the response utterance if the result of the speech recognition is affirmative. On the other hand, the utterance generation unit 100 generates “sorry, XX” as a response utterance sentence if the result of speech recognition needs to be denied. The utterance generation unit 100 may present any one of the generated response utterances as the utterance of the robot R1.

  Note that when the interactive system 100 accepts a user's utterance, the user may be prompted to utter by moving the robot head or line of sight toward the user, for example.

<Modification 1>
In the above-described embodiment, the dialog system generates the utterance sentence of the robot (original utterance sentence, post-conversion utterance sentence, confirmation utterance sentence, response utterance sentence) before the utterance. Before performing, generation and speech synthesis are performed, the synthesized speech data is stored in a storage unit (not shown), and each synthesized speech data is presented at a predetermined timing during the actual dialogue. It is good also as a structure reproduced | regenerated by 2. In addition, before the first utterance, the robot utterance is generated before the utterance, and the utterance is stored in a storage unit (not shown), and each utterance is spoken at a predetermined timing during actual dialogue. It is good also as a structure which synthesize | combines and obtains synthetic | combination audio | voice data and reproduces | regenerates by the presentation part 101-1 or 101-2.

<Modification 2>
In the above-described embodiment, an interactive system including two robots has been described. However, as described above, there is a form in which the utterance determination unit 120 does not determine the robot to speak. Therefore, there is a form in which the dialog system 100 does not necessarily require two robots. In the case of this form, the robot included in the dialogue system 100 may be one. In addition, as described above, there is a form in which the utterance determining unit 120 determines two robots as uttering robots. This form may be operated in a configuration in which the dialog system 100 includes three or more robots.

<Modification 3>
In a configuration in which the dialogue system 100 includes a plurality of robots, the number of presentation units may not be the same as the number of robots as long as the user can determine which robot is speaking. Further, the presentation unit may not be installed in the robot. Well-known technologies such as making it possible for the user to determine which robot is speaking by changing the voice quality of the synthesized speech for each robot, or making the localization different for each robot using multiple speakers May be used.

<Modification 4>
In the embodiment described above, an example in which a robot is used as an agent to perform a voice conversation has been described. However, the robot in the embodiment described above is a humanoid robot having a body or the like, but a robot having no body or the like. There may be. In addition, the dialogue technique of the present invention is not limited to these, and it is also possible to adopt a form in which a dialogue is performed using an agent that does not have an entity such as a body and does not have an utterance mechanism like a robot. As such a form, for example, a form in which dialogue is performed using an agent displayed on a computer screen can be cited. More specifically, in a group chat such as “LINE” or “2 Channel (registered trademark)” in which multiple accounts interact by text messages, the user account and the dialog device account interact. It is also possible to apply this dialogue system. In this form, the computer having the screen for displaying the agent needs to be in the vicinity of the person, but the computer and the interactive device may be connected via a network such as the Internet. That is, this dialogue system can be applied not only to a dialogue in which speakers such as a person and a robot actually talk each other but also to a conversation in which the speakers communicate via a network.

  As shown in FIG. 7, the interactive apparatus according to this modification includes at least an utterance generation unit 150, an utterance determination unit 120, and a presentation unit 101. The utterance determination unit 120 includes an interface capable of communicating with an external chat dialog system and a scenario dialog system. The chat dialogue system and the scenario dialogue system may be configured in the dialogue apparatus as a processing unit having the same function. Further, the utterance generation unit 150 and the utterance determination unit 120 include an interface capable of communicating with an information processing apparatus existing outside, and a part of each part or a processing unit having a similar function is provided inside the information processing apparatus outside the dialog apparatus. You may comprise.

  The interactive apparatus according to this modification is an information processing apparatus such as a mobile terminal such as a smartphone or a tablet or a desktop or laptop personal computer. In the following description, it is assumed that the interactive device is a smartphone. The presentation unit 101 is a liquid crystal display included in the smartphone. A chat application window is displayed on the liquid crystal display, and conversation contents of the group chat are displayed in time series in the window. The group chat is a function in which a plurality of accounts post a text message to each other and develop a conversation in the chat. It is assumed that a plurality of virtual accounts corresponding to a virtual personality controlled by the dialogue apparatus and a user account participate in this group chat. That is, this modification is an example in which the agent is a virtual account displayed on a liquid crystal display of a smartphone that is an interactive device. In addition, in the interactive apparatus according to this modification corresponding to the second embodiment or the third embodiment, the user inputs the utterance content by using the software keyboard displayed on the liquid crystal display of the smartphone as the input unit 102, You can post to group chat through your account. Note that a microphone mounted on a smartphone may function as the input unit 102, and the user may input utterance content by speaking. In this configuration, the dialogue apparatus includes the utterance end detection unit 140 or the voice recognition unit 141, or includes an interface capable of communicating with an information processing apparatus existing outside, and the utterance end detection unit 140 or the voice recognition unit 141. A processing unit having the same function as is configured in an information processing apparatus outside the interactive apparatus. Moreover, it is good also as a structure which outputs the utterance content obtained from each dialog system from the speaker with the audio | voice corresponding to each virtual account, using the speaker and speech synthesis function which were mounted in the smart phone.

<Modification 5>
As described in the first modification, the utterance generation unit 150 and the utterance determination unit 120 can obtain a plurality of utterance sentences for allowing a plurality of robots to interact with each other. Further, the speech generation unit 150, the speech determination unit 120, and the speech synthesis unit 110 can obtain synthesized speech data of a plurality of utterances for allowing a plurality of robots to interact with each other. Further, as described in the fourth modification, the generated utterance may be presented not to the robot but to an agent having no utterance mechanism such as an agent displayed on the computer screen. That is, the apparatus using the utterance generation unit 150 and the utterance determination unit 120 can function as an interaction scenario generation apparatus that generates a plurality of utterance sentences for allowing a plurality of agents to interact with each other. In addition, the apparatus including the utterance generation unit 150, the utterance determination unit 120, and the speech synthesis unit 110 can function as an interaction scenario generation apparatus that generates synthesized speech data of a plurality of utterances for allowing a plurality of agents to interact with each other.

<Other variations>
The present invention is not limited to the above-described embodiments and modifications. For example, the above-described various processes other than the utterance order presented by the presentation unit are not only executed in time series according to the description, but also in parallel or individually as required by the processing capability of the apparatus that executes the processes or as necessary. May be. In addition, it can change suitably in the range which does not deviate from the meaning of this invention.

<Program and recording medium>
In addition, various processing functions in each device described in the above embodiment and Modifications 1-3 and 5 may be realized by a computer. In that case, the processing contents of the functions that each device should have are described by a program. Further, various processing functions in the dialogue system described in Modification 4 may be realized by a computer. In that case, the processing content of the function that the dialogue system should have is described by a program. Then, by executing this program on a computer, various processing functions in each of the above devices are realized on the computer.

  The program describing the processing contents can be recorded on a computer-readable recording medium. As the computer-readable recording medium, for example, any recording medium such as a magnetic recording device, an optical disk, a magneto-optical recording medium, and a semiconductor memory may be used.

  The program is distributed by selling, transferring, or lending a portable recording medium such as a DVD or CD-ROM in which the program is recorded. Further, the program may be distributed by storing the program in a storage device of the server computer and transferring the program from the server computer to another computer via a network.

  A computer that executes such a program first stores, for example, a program recorded on a portable recording medium or a program transferred from a server computer in its storage unit. When executing the process, this computer reads the program stored in its own storage unit and executes the process according to the read program. As another embodiment of this program, a computer may read a program directly from a portable recording medium and execute processing according to the program. Further, each time a program is transferred from the server computer to the computer, processing according to the received program may be executed sequentially. Also, the program is not transferred from the server computer to the computer, and the above-described processing is executed by a so-called ASP (Application Service Provider) type service that realizes the processing function only by the execution instruction and result acquisition. It is good. Note that the program includes information provided for processing by the electronic computer and equivalent to the program (data that is not a direct command to the computer but has a property that defines the processing of the computer).

  In addition, although each device is configured by executing a predetermined program on a computer, at least a part of these processing contents may be realized by hardware.

Claims (20)

A dialogue method performed by a dialogue system,
The dialog system includes an utterance generation step of generating an utterance;
The dialogue system obfuscates at least a part of the utterance generated by the utterance generation step, and / or replaces a word included in the utterance generated by the utterance generation step with a word having no meaning of the word An utterance determination step for obtaining an utterance generated by conversion as an utterance after conversion,
The dialog system includes an utterance presentation step of presenting the converted utterance obtained by the utterance determination step;
How to interact. A dialogue method performed by a dialogue system,
A first utterance generated by the dialogue system by obscuring at least a part of a predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word A first utterance presentation step of presenting an utterance;
A second utterance presentation step of presenting a second utterance which is an utterance that can be read that the first utterance cannot be uniquely interpreted after the dialogue system presents the first utterance;
How to interact. A dialogue method performed by a dialogue system,
A first utterance generated by the dialogue system by obscuring at least a part of a predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word A first utterance presentation step of presenting an utterance;
A second utterance presentation step of presenting a second utterance that is an utterance including a question for specifying the first utterance as one meaning after the dialogue system presents the first utterance; Including,
How to interact. A dialogue method according to claim 2 or 3, wherein
The dialogue system is an utterance that responds to the second utterance after presenting the second utterance and includes an utterance including a word that specifies the first utterance as one meaning. A third utterance presentation step of presenting three utterances,
How to interact. A dialogue method performed by a dialogue system,
A first utterance presentation step in which the dialogue system presents an utterance that is at least partially obfuscated, and / or an utterance that includes a meaningless word;
The dialogue system has a meaning corresponding to an utterance including specific content corresponding to the obfuscated part and / or a part of a word having no meaning after the presentation by the first utterance presentation step. A second utterance presentation step for presenting utterances including words,
How to interact. A dialog scenario generation method in which a dialog scenario generation device generates a dialog scenario used for a dialog performed by a dialog system,
The dialogue scenario generation device includes:
A first utterance that is an utterance generated by obscuring at least a part of the predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word;
A second utterance that is an utterance that is presented after presenting the first utterance and that can be read that the first utterance cannot be uniquely interpreted;
Generate an interactive scenario containing
Dialog scenario generation method. A dialog scenario generation method in which a dialog scenario generation device generates a dialog scenario used for a dialog performed by a dialog system,
The dialogue scenario generation device includes:
A first utterance that is an utterance generated by obscuring at least a part of the predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word;
A second utterance that is an utterance that is presented after presenting the first utterance, and that includes a question for identifying the first utterance as one meaning;
Generate an interactive scenario containing
Dialog scenario generation method. A dialog scenario generation method according to claim 6 or 7,
An utterance responding to the second utterance, which is an utterance to be presented after presenting the second utterance, and further including an utterance including a word specifying the first utterance as one meaning Generate conversation scenarios,
Dialog scenario generation method. A dialog scenario generation method in which a dialog scenario generation device generates a dialog scenario used for a dialog performed by a dialog system,
The dialogue scenario generation device includes:
A first utterance that is an utterance that is at least partially obfuscated, and / or includes a word that has no meaning;
An utterance to be presented after presenting the first utterance, and an utterance including specific contents corresponding to the obfuscated part, and / or a word having a meaning corresponding to a part of a word not having the meaning A second utterance that is,
Generate an interactive scenario containing
Dialog scenario generation method. An utterance generator for generating an utterance;
An utterance generated by obscuring at least a part of the utterance generated by the utterance generation unit and / or by replacing a word included in the utterance generated by the utterance generation step with a word having no meaning of the word An utterance determination unit that obtains utterance after conversion,
An utterance presentation unit that presents the converted utterance obtained by the utterance determination unit,
Dialog system. A first utterance that is an utterance generated by obscuring at least a part of a predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word One utterance presentation unit;
A second utterance presenting unit that presents a second utterance that can be read that the first utterance cannot be uniquely interpreted after presenting the first utterance,
Dialog system. A first utterance that is an utterance generated by obscuring at least a part of a predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word One utterance presentation unit;
A second utterance presentation unit that presents a second utterance that is an utterance including a question for specifying the first utterance as one meaning after presenting the first utterance;
Dialog system. The dialogue system according to claim 11 or 12,
After presenting the second utterance, present a third utterance that is an utterance that responds to the second utterance and that includes a word that identifies the first utterance as one meaning. And a third utterance presentation unit
Dialog system. An utterance including at least part of an obscured utterance, and / or an utterance including a word having no meaning, and an utterance including a specific content corresponding to the obscured part, and / or the meaning Including a presentation unit for presenting an utterance including a word having a meaning corresponding to a part of a word not having
Dialog system. A dialogue scenario generation device for generating a dialogue scenario used for dialogue performed by a dialogue system,
A first utterance that is an utterance generated by obscuring at least a part of the predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word;
A second utterance that is an utterance that is presented after presenting the first utterance and that can be read that the first utterance cannot be uniquely interpreted;
Generate an interactive scenario containing
Dialog scenario generator. A dialogue scenario generation device for generating a dialogue scenario used for dialogue performed by a dialogue system,
A first utterance that is an utterance generated by obscuring at least a part of the predetermined utterance and / or replacing a word included in the predetermined utterance with a word having no meaning of the word;
A second utterance that is an utterance that is presented after presenting the first utterance, and that includes a question for identifying the first utterance as one meaning;
Generate an interactive scenario containing
Dialog scenario generator. The dialogue scenario generation device according to claim 15 or 16,
An utterance responding to the second utterance, which is an utterance to be presented after presenting the second utterance, and further including an utterance including a word specifying the first utterance as one meaning Generate conversation scenarios,
Dialog scenario generator. A dialogue scenario generation device for generating a dialogue scenario used for dialogue performed by a dialogue system,
A first utterance that is an utterance that is at least partially obfuscated, and / or includes a word that has no meaning;
An utterance to be presented after presenting the first utterance, and an utterance including specific contents corresponding to the obfuscated part, and / or a word having a meaning corresponding to a part of a word not having the meaning A second utterance that is,
Generate an interactive scenario containing
Dialog scenario generator.   15. A program for causing a computer to function as the interactive system according to claim 10.   A program for causing a computer to function as the dialogue scenario generation device according to any one of claims 15 to 18.

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