KR101805607B1 - Method for making abstracts from Voice of Customer data - Google Patents
Method for making abstracts from Voice of Customer data Download PDFInfo
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- KR101805607B1 KR101805607B1 KR1020160008005A KR20160008005A KR101805607B1 KR 101805607 B1 KR101805607 B1 KR 101805607B1 KR 1020160008005 A KR1020160008005 A KR 1020160008005A KR 20160008005 A KR20160008005 A KR 20160008005A KR 101805607 B1 KR101805607 B1 KR 101805607B1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/26—Speech to text systems
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/08—Speech classification or search
- G10L15/18—Speech classification or search using natural language modelling
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/28—Constructional details of speech recognition systems
Abstract
There is provided a method for effectively generating a summary composed of sentences having important significance in VOC data. A method for generating a summary from the VOC data comprises the steps of: (a) constructing LSP knowledge in advance by defining a concept, a semantic feature, and an LSP for the VOC; and (b) (C) calculating the importance of sentences using the detected LSPs and conceptual and semantic qualities associated with the detected LSPs; and (d) Extracting a predetermined number of sentences in order of importance from the sentences constituting the VOC data, and generating a summary sentence.
Description
The present invention relates to a method of processing voice data of a customer (hereinafter referred to as "VOC") data, and more particularly to a method of processing VOC To a method for generating a summary from data.
In general, many companies operate a call center and provide various response services such as complaints, requirements, and inquiries about products or services from customers. Rather than stop at the level of simply providing problem solving for every item that is received, we will use the voice of customer (VOC) collected from this response service effectively to improve the overall quality of the products or services provided by the company. Has come.
Specifically, the VOC is conducted in a conversation format between the agent and the customer. From the VOC analysis, the service can be improved by grasping the customer's dissatisfaction or needs. However, there is a difference depending on the scope of the project, but the amount of VOC data received through the call center is very large and it is very difficult to analyze it systematically and collectively. It takes hundreds to thousands of calls every day to call centers and it takes a lot of time and manpower to check daily VOC data.
Recently, there has been an attempt to summarize the original text of VOC data in order to efficiently manage VOC data. For example, there are various methods based on ontology construction, based on keyword extraction, or calculating the similarity between words appearing in a sentence. However, it is difficult to grasp the exact meaning of the above-mentioned methods, which requires a complex relationship definition or the original text, compared to the knowledge to be constructed. Especially, in the case of generating a summary by using a sentence having a high frequency of occurrence, it is very inappropriate to summarize a conversational text such as VOC. For example, a sentence such as "Hello Hello" is the most frequently occurring sentence in the VOC data, but it is meaningless in summary sentences.
Thus, according to the method of generating a summary from the conventional VOC data, it is difficult to provide a meaningful summary because it extracts a summary by simply analyzing keywords and association.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of extracting only sentences having important meaning among VOC data and effectively generating summary sentences.
The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.
According to another aspect of the present invention, there is provided a method for generating a summary from a customer's voice (VOC) data using a lexical meaning pattern (LSP), the method comprising: (a) Constructing the LSP knowledge in advance by defining a concept, a semantic feature, and an LSP; (b) analyzing the morphemes of the sentences constituting the input VOC data and detecting LSPs matching the respective sentences from the LSP knowledge; (c) calculating importance of the sentence by using the detected LSP, a concept and a semantic feature associated with the detected LSP; And (d) generating a summary sentence by extracting a predetermined number of sentences in order of importance from among the sentences constituting the VOC data.
The step (a) may include defining the concept as a set to which the LSPs belong; Collecting VOC sample data and classifying it according to the concept; Constructing a semantic feature dictionary in which one or more entries having the same meaning are grouped into one set as a basic unit constituting the meaning of the concept; And constructing the concept, the semantic feature and the LSP knowledge defined by the LSP.
The method may further include, before the step (b), recognizing the voice data from the input VOC data and converting the voice data into a text sentence.
Wherein the step (c) comprises the steps of: using the LSP, the semantic qualities, and the respective weights representing the degree of necessity for generating the summary statement, and the positive negative level obtained by quantifying the strength of the positive or negative expression of the sentence, The importance can be calculated.
The importance may be proportional to the sum of all the weights of the concept, the LSP, and the semantic qualities included in the sentence.
In the step (d), the extracted sentences may be arranged in the order of the original text of the VOC data.
If it is difficult to grasp the meaning of the summary, it is possible to extract a sentence in the original text arranged before, after, or after at least one of the extracted sentences, and add the extracted sentence to the summary.
Summing and normalizing the importance of the sentences constituting the VOC data to calculate an average importance of the VOC data; And calculating the average importance for each VOC data for a plurality of VOC data belonging to the same category and comparing the calculated average importance with each other.
The details of other embodiments are included in the detailed description and drawings.
As described above, according to the method for generating summary texts from VOC data according to the present invention, it is possible to efficiently extract sentences having important meaning by generating numerical significance for each sentence constituting VOC data, thereby generating a summary sentence.
In addition, since the importance is calculated based on the LSP of the sentence, the importance can be consistently evaluated for the sentence belonging to the specific pattern.
Furthermore, since the importance of the sentence is calculated by weighting not only the LSP but also the related semantic qualities and concepts individually, the meaning of the sentence can be grasped more accurately and a summary sentence can be generated.
1 is a block diagram schematically showing a configuration of a VOC summarizing apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart sequentially illustrating a method for generating a summary from VOC data using an LSP according to an embodiment of the present invention. Referring to FIG.
FIG. 3 is a flowchart specifically illustrating a step of constructing VOC-related LSP knowledge of FIG.
FIG. 4 is a diagram exemplifying a screen configuration of an administrator terminal in defining the concept of FIG. 3. FIG.
FIG. 5 is an exemplary diagram illustrating a semantic feature dictionary table defining semantic features in constructing the semantic feature dictionary of FIG. 3. FIG.
FIG. 6 is an exemplary diagram illustrating the configuration of an entry table for the semantic qualification "meeting (4469)" in FIG.
7 is a diagram exemplarily showing a configuration of an LSP construction table generated according to the method of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.
Each block described above may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative implementations, the functions mentioned in the blocks may occur out of order. For example, two blocks that are shown one after the other may actually be executed substantially concurrently, or the blocks may sometimes be performed in reverse order according to the corresponding function.
The Voice of Customer (VOC) manages the processing status in real time from receipt of customer complaints received at the management system call center until the processing is completed, A customer management system that improves service. In the present invention, VOC data refers to a data file storing conversation contents between a customer and an agent in a management system call center, and may be composed of voice data or text data. One VOC data refers to data generated between a customer and an agent, and a summary-generating process can be performed on a plurality of VOC data belonging to the same category.
A VOC summarizing apparatus according to an embodiment of the present invention will be described with reference to FIG. 1 is a block diagram schematically showing a configuration of a VOC summarizing apparatus according to an embodiment of the present invention.
As shown in FIG. 1, the
Specifically, the
The
The LSP
The
For the sentence, the
The
Hereinafter, a method of generating a summary of VOCs using the LSP according to an embodiment of the present invention will be described in detail with reference to FIG. 2 to FIG. 2 is a flowchart sequentially illustrating a method of generating a summary from VOC data according to an exemplary embodiment of the present invention.
The LSP
The LSP knowledge construction method according to an embodiment of the present invention is also a text analysis and LSP dictionary construction process. Each of these steps can be performed by an administrator terminal, which is a computing system in which a hardware / software module is built.
First, the LSP
Concepts can also have a hierarchical structure. As shown in the
For example, in the case of a VOC related to a shopping mall, concepts such as product refund, return, and inquiry can be constructed separately, and the sentence matched to the LSP belonging to the refund concept includes the meaning of the refund .
In order to construct the LSPs belonging to each concept, it is necessary to acquire the VOC sample data to be the target. The VOC sample data is preferably text data, and in the case of voice data, it can be used through voice-text conversion. VOC sample data is collected and classified according to the concept (S102). The more sample data is collected, the more elaborate concept and LSP construction becomes possible. This has a direct impact on the accuracy of VOC summaries. The collected sample data is classified according to the concept of construction. If the collected sample data is difficult to classify into a specific concept, that is, there is no concept corresponding to the collected sample data, the concept can be added or modified .
For the sake of conceptual understanding and explanation of LSP knowledge construction, sample data such as the following sentence is illustrated:
(A) "Is there a good meeting place nearby?"
(B) "Let me have a good restaurant to meet in Gangnam"
(C) Show "Baseball Channel"
In order to accurately understand and analyze Korean sentence structures and components, it is necessary to structure vocabularies that have the same meaning but have the same meaning. To this end, the LSP
The semantic feature is one of the basic units of the LSP, and the semantic feature dictionary is a set of one or more entries having the same meaning.
As for the sentence of the sample data, (A) sentence consists of semantic qualities such as "request", "place", "meeting". Each semantic feature may include, for example, an entry such as "request (inform) "," place (restaurant) ", & (B) The sentence consists of semantic qualities such as "region", "meeting", "place" and (C) the sentence consists of semantic qualities such as "sports", "channel" The concept covering these sentences can be seen as "navigation". Eventually, from several sample sentences, this concept can consist of semantic qualities such as "request", "place", "meeting", "region", "sports", "channel"
In FIG. 4, the map concept under the navigation concept means a request for searching for a place, and the concept may be composed of semantic qualities such as "place", "request", "meeting", " The path concept under the navigation concept may have additional "path" semantic qualities instead of "meeting" semantic qualities.
The meaning qualities will be described in detail with reference to FIG. Let us explain as an example the meaning (220) "meeting" of the semantic feature dictionary table 210 (4469).
In a sentence, "discussion", "discussion", "meeting +", "meeting", "meeting", "promise", "talk", "meeting" have the same meaning. Therefore, these words can be grouped into entries of the
These semantic qualities play the same role as dictionaries and semantic qualities can be a set of vocabulary entries because they add vocabulary entries with the same semantics to the defined semantic qualities. The semantic qualities of the keywords and the semantic qualities of the narrative expressions may be included in the domain.
In LSP, the symbol "@" is used to express the semantic feature as "@meeting". These semantic qualities serve as a kind of lexical variable, and the lexical item can be substituted for the lexical item. Once the construction of the semantic feature dictionary is completed, it is used to construct LSP knowledge for the sample data collected and classified (S104).
When constructing LSP knowledge, it is possible to use not only semantic qualities, but also expressions such as phrases, morphemes, syllables, dictionaries, variables based on various grammar expressions, and various operators. As described above, in the present invention, the LSPs must belong to an arbitrary concept.
By constructing the semantic feature dictionary (S103) as described above, the LSP expressing one representative sentence pattern can recognize sentences as many as the combination of semantic qualities and entries constituting the LSP.
7, the LSP construction table 240 according to an exemplary embodiment of the present invention is a part of LSPs of representative sentence patterns related to the sample data examples (A), (B), and (C) . The basic structure of an LSP includes vocabulary, parts of speech, and morphemes. Table 1 below describes the meanings of the symbols (operators and parts of speech) used to express the LSP in FIG.
[( W 1 )] [( W 2 )]
[ W 1 ] [; W 2 ]
- Confirm the combination of the rightmost and the leftmost morpheme in the expression on the right and the expression on the right.
Cmin ≤ Cmax , Cmin ≥ 0
^: = ^ 0 ~ 8, ^ ~% d: = ^ 0 ~% d
^% d: = ^ 0 ~% d, ^% d ~: = ^% d ~ 8
- You can substitute L and P in the case of being enclosed by {} qualifiers, but not W.
- When used in the front or back of a word, it is used as a wildcard that can be matched to a word.
Cmin ≤ Cmax , Cmin ≥ 1
#: # # 0 ~ 8, # ~% d: = # 0 ~% d
#% d: = # 0 ~% d, #% d ~: = #% d ~ 8
- You can substitute L and P in the case of being enclosed by {} qualifiers, but not W.
- When used in the front or back of a word, it is used as a wildcard that can be matched to a word.
- replace all expressions once or implicitly
Character ∈ {(,), {,}, =, +, *, #, @,?, &,!, \, ~}
- Literal \ is applied to one character
- The cardinality of * is the same as ^ or #
[: alpha:]
[: digit:]
[: lower:]
[: upper:]
PERL character class
[A-Za-z0-9]
[! "# $% &'() * +,. / :; <=>? @ \ ^ _` {|} ~ -]
- Perform post-processing if $ exists
Once the VOC-related LSP knowledge is constructed in this way, a basic knowledge building process for generating a summary from VOC data is completed. Hereinafter, the process of generating the summary text from the VOC data to be processed will be described in detail.
Referring to FIG. 2, the
Then, the
Using the following example 1 as an example, we explain how to analyze the morpheme in detail.
Example 1
Can you pass the pepper?
When the
Example 2
Pepper / NNG / MO / VV + EM / EM / VX + City / EP + EM / SC
Then, the
Example sentence 3
(/ NN_) (/ MA) * 2? (3) + (EP / EP) + (/ EM)? / SC
The
The importance of one sentence can be calculated according to Equation 1 below.
[Equation 1]
In Equation 1, the importance f is a function of α, β, γ, and δ, α is the number of concepts matched in one sentence, β is the number of LSPs matched in one sentence, Denotes the number of matching semantic qualities, and δ corresponds to a category constant that can be specified by the user according to the VOC category. N k denotes the number of times the k th concept is matched to one sentence, n h denotes the number of times that the h th LSP is matched to one sentence, n j denotes the number of times that the j th semantic feature matches the one sentence . Further, W indicates the weight and k_concept, W h _ LSP of the k-th concept, refers to the weight of the h-th LSP, and W j _ SF refers to the weight of the j-th semantic features. The weight can be arbitrarily set by the user, for example, between 1 and 10 depending on the relationship with the VOC population, summary suitability, and the like. Qualitatively looking at Equation 1, the importance f of a sentence is proportional to the sum of all the weights of the concept, LSP, and semantic qualities contained in a sentence.
The positive negativity level (neg) in Equation 1 can be defined by
[Equation 2]
In the Formula 2 M h is a set of weight values of semantic features contained in the h-th LSP matched to the sentence, and, avg (M h) is the average of the set of M h, W h _ LSP is a h-th LSP , Where β is the number of LSPs matched to a sentence, E is 1 if the sentence is positive, -1 if the sentence is negative, and 0 if the sentence is neutral.
For example, let's estimate the negative level (neg) for the example sentence "No TV." This example can be matched to an LSP called "@ commodity + / J_ @ complaints". Assuming that the "@ commodity" semantic qualification has a weight of 4, the meaning of "@ dissatisfaction" is a weight of 10, and the corresponding LSP has a weight of 10 and only one LSP matches the example sentence, Negative level (neg) has a value of 1.857.
The above process is repeated to calculate the importance for all sentences constituting the VOC data. The
If there is a lack of probability between the extracted sentences and it is difficult to grasp the meaning only by the summary, at least one of the extracted sentences can be added to the summary sentence placed before, after, or after the sentence in the original text have. For example, in the above example, the fourth and sixth sentences placed before and after the fifth sentence can be added to the summary sentence to generate a summary sentence from the first through the fourth through the fifth through the sixth through the tenth sentences.
In this way, a summary composed of at least one sentence is generated for one VOC data. In some cases, morpheme analysis can be used to exclude unnecessary vocabulary or phrases defined in a sentence from the summary.
One VOC data is usually composed of a plurality of original sentences. After the importance of all sentences is added, the average importance of the corresponding VOC data can be calculated by normalizing (S170). Therefore, it is possible to calculate the average importance for each VOC data for a plurality of VOC data belonging to the same category, and to compare the VOC data with each other, so that the importance priority can be set between VOC data.
For reference, the LSP pre-construction and Korean machine translation methods according to various preferred embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs, DVDs, magneto-optical media such as floptical disks, A hard disk drive, a flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, as well as machine accords such as those produced by a compiler. A hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.
10: voice recognition unit 20: text conversion unit
30: LSP knowledge construction unit 40: LSP detection unit
50: importance calculating unit 60:
70: DB 100: VOC summary device
200: concept generation screen 210: semantic qualification dictionary table
220: Meaning qualities 230: Entry table
240: LSP building table
Claims (8)
(a) establishing LSP knowledge in advance by defining concept, semantic qualities and LSP for VOC;
(b) analyzing the morphemes of the sentences constituting the input VOC data and detecting LSPs matching the respective sentences from the LSP knowledge;
(c) calculating importance of the sentence by using the detected LSP, a concept and a semantic feature associated with the detected LSP; And
(d) extracting a predetermined number of sentences in order of importance from the sentences constituting the VOC data to generate a summary sentence.
Defining the concept as a set to which the LSPs belong; Collecting VOC sample data and classifying it according to the concept;
Constructing a semantic feature dictionary in which one or more entries having the same meaning are grouped into one set as a basic unit constituting the meaning of the concept; And
Constructing the concept, the semantic feature and the LSP knowledge defined by the LSP.
Recognizing speech data from the input VOC data and converting the speech data into a text sentence.
Wherein the step (c) comprises the steps of: using the LSP, the semantic qualities, and the respective weights representing the degree of necessity for generating the summary statement, and the positive negative level obtained by quantifying the strength of the positive or negative expression of the sentence, A method for generating a summary from VOC data that yields importance.
Wherein the importance is generated from VOC data proportional to the sum of all the weights of the concept, the LSP and the semantic qualities included in the sentence.
In the step (d), the extracted sentence is generated from VOC data arranged in the order of the original text of the VOC data.
Extracting in-text sentences arranged before, after, or after at least one of the extracted sentences and adding the extracted in-sentences to the summary sentence when it is difficult to understand the meaning of the summary sentence.
Summing and normalizing the importance of the sentences constituting the VOC data to calculate an average importance of the VOC data; And
Further comprising calculating the average importance for each VOC data for a plurality of VOC data belonging to the same category, and comparing the average importance with each other, and generating a summary from the VOC data.
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