KR100829583B1 - Method and apparatus to memo for call contents automatically, and method and apparatus to display call list - Google Patents

Abstract

A method and device for automatically noting down telephone call contents, a call list display method, and a device therefor are provided to display stored memo information for a user in case a call list is inquired about after a call is terminated, thus the user can confirm call contents together with call details through displayed core word text memos. Call zones for interpreting a voice signal are set(102-110). The voice signal transceived in the set call zones is interpreted to extract core words included in the transceived voice signal(112). The extracted core words are set to memos, so that the set memos are stored(114). When a call is terminated, the stored memos are displayed(116,118). It is determined whether the displayed memos are tagged(120). The displayed memos are modified by a user(122).

Description

Method and apparatus to memo for call contents automatically, and method and apparatus to display call list}

1 is a diagram illustrating a method for automatically memoizing the contents of a telephone call according to an exemplary embodiment of the present invention.

2 is a view showing that the voice memo is stored in the mobile phone according to an embodiment of the present invention.

3 is a diagram illustrating a method of extracting a key word according to an exemplary embodiment of the present invention.

4 illustrates key words displayed on a screen according to an exemplary embodiment of the present invention.

5 is a diagram illustrating a method of displaying a call list according to an exemplary embodiment of the present invention.

6A is a diagram illustrating a call list displayed on a screen according to an exemplary embodiment of the present invention.

6B is a diagram illustrating a call history displayed on a screen according to an exemplary embodiment of the present invention.

7 is a diagram illustrating an apparatus for automatically memorizing the contents of a phone call according to an exemplary embodiment of the present invention.

8 is a diagram illustrating an apparatus for displaying a call list according to an exemplary embodiment of the present invention.

The present invention relates to a method and device for automatically memorizing the contents of a phone call, a method and a device for displaying a call list, and more particularly, to store key words desired by a user in a text memo form during a phone call, and the user inquires a call list. The present invention relates to a method and an apparatus for displaying a memo stored together with a call log.

As the popularity of mobile phones increases and it becomes possible to talk to the other party anytime and anywhere, technologies for storing call contents are being developed. In the past, a pen and paper were required to memoize the contents of the call. Thus, many methods for recording the contents of the call without having a pen and paper have been disclosed. By pressing a specific button in one of these methods, a method of storing a call content as a voice file has been disclosed. In addition, when a user makes a call in an automobile environment, a method of automatically storing a conversation with a counterpart and playing a voice memo through a car stereo of a vehicle has also been disclosed. On the other hand, as a way to take note of important information when talking on the mobile phone while walking or driving, it is equipped with specific buttons (delete, play, save, etc.) to save the voice content of a certain section through this button, and to play it later if necessary Disclosed is a method for enabling deletion. However, the above-described prior arts suggest a method and a system in which a user can store important call contents in a call through a voice memo button and retrieve the call, but the user can directly store a stored voice memo in a call list inquiry. There was a problem that you can hear through to hear what the call is.

Meanwhile, a number display method for detecting a number sound included in a voice signal during a voice call through voice recognition and storing important numbers such as a phone number or a social security number in a display window is also disclosed. In this method, it is difficult to memorize a number in a voice call, and the voice memo associated with the number can be automatically performed by limiting the recognition target vocabulary to the number. In addition, this method suggests a method of automatically storing texts related to numbers during voice calls as texts through voice recognition, and for easy retrieval afterwards. However, if there are important call contents other than numbers, there is a problem that can not be used when you want to automatically note and confirm after the call.

An object of the present invention is to provide a method and apparatus for automatically memoizing a call content that a user wants to save as text information by using a voice recognition technology and a keyword extraction technology.

In addition, by displaying the memo information stored to the user when the call list is viewed after the call is terminated, the user can check the call details such as the caller's phone number and the call time, and the key word text memo indicating the contents of the call. To provide a method and an apparatus.

Further, the present invention provides a computer-readable recording medium having recorded thereon a program for executing the above method on a computer.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains. .

According to an aspect of the present invention, there is provided a method of automatically storing a telephone call content, the method comprising: setting a call interval for interpreting a voice signal; Extracting key words included in the transmitted / received voice signal by analyzing voice signals transmitted and received in the set call period; And setting and extracting the extracted key words as a memo.

In order to solve the above other technical problem, there is provided a computer-readable recording medium having recorded thereon a program for executing a method for automatically storing the phone call content according to the present invention.

In order to solve the another technical problem, the method for displaying a call list according to the present invention comprises the steps of setting a call interval for interpreting a voice signal; Extracting key words included in the transmitted / received voice signal by analyzing voice signals transmitted and received in the set call period; Storing the extracted key words as memos; And adding each of the stored memos to the call history corresponding to the stored memos and displaying the call list.

In order to solve the other technical problem, there is provided a computer-readable recording medium recording a program for executing a method for displaying a call list according to the present invention on a computer.

In order to solve the another technical problem, the apparatus for automatically storing the telephone call content according to the present invention comprises a call section setting unit for setting a call section for interpreting a voice signal; A key word extracting unit for extracting key words included in the transmitted and received voice signals by analyzing voice signals transmitted and received in the set call period; And a storage unit for storing the extracted key words as a memo.

In order to solve the another technical problem, the apparatus for displaying a call list according to the present invention includes a call section setting unit for setting a call section for interpreting a voice signal; A key word extracting unit for extracting key words included in the transmitted and received voice signals by analyzing voice signals transmitted and received in the set call period; A storage unit configured to store the extracted key words as memos; And a screen controller configured to add the stored memos to the call history corresponding to the stored memos and display them in a call list.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a method for automatically memoizing the contents of a telephone call according to an exemplary embodiment of the present invention.

When the user starts a phone call, the phone call proceeds in step 102.

If the user determines that the content is to be memorized during a phone call, the user presses the save memo button in step 104. That is, when the user determines that the phone call is important during the phone call and needs to be saved as a memo, the user presses the memo save button.

After the point in time at which the memo storage button is pressed in step 106, a voice signal transmitted and received during a phone call is recorded.

2 is a view showing that the voice memo is stored in the mobile phone according to an embodiment of the present invention.

As shown in FIG. 2, when the memo save button 200 exists on the side of the mobile phone and the user presses the memo save button 200 in step 104, the user may display the screen 210 of FIG. 2. The call is recorded. In an embodiment of the present invention, when the memo save button is pressed, the contents of the call are set to be recorded. However, the memo save button may be set to be recorded by a separate button.

In operation 108, when the user presses the memo storing button pressed, recording of a voice signal transmitted and received during a phone call is stopped. That is, the voice signal transmitted and received during a phone call is recorded from the time when the user presses the memo save button until the user releases the memo save button pressed. In an embodiment of the present invention, the memo storage button is pressed and the sound signal transmitted / received until the pressed button is released is recorded, but the present invention is not limited thereto. In other words, a button other than the save memo button may be used. You can also press the Save Memo button once to start recording, and press the Save Memo button again to stop recording.

That is, any method may be used as long as a control signal indicating the starting point and a control signal indicating the ending point are generated. In an embodiment of the present invention, a method of generating such a control signal by pressing a memo storage button and releasing the pressed button is used.

In step 110, the section setting for speech recognition is preprocessed. In an exemplary embodiment of the present invention, a voice signal transmitted / received in a set section is set by setting a period for recognizing speech from a time point at which the memo save button of step 104 is released to a point at which the memo save button of step 106 is released. Interpret However, it is also possible to call important contents prior to the moment when the memo save button of step 104 is pressed. In this case, it is necessary to set the section to recognize the voice including the previous part when the memo storage button is pressed. At this time, the first part of the conversation is searched or the previous short time call section is buffered to perform voice recognition. As a method of finding the beginning of the conversation, a speech-silence detection algorithm or speaker turn detection may be used. Therefore, the voice-non-speech section discrimination algorithm or the speaker transition section discrimination method is used to set the speech recognition section including all the first parts of the conversation. In an embodiment of the present invention, in step 106, the voice signal is recorded and a section for recognizing the voice is recorded from the recorded voice file. However, the section for recognizing the voice may be set without recording the voice signal. That is, in another embodiment of the present invention for automatically memorizing the contents of a phone call, after recognizing a voice signal after setting a section for recognizing a voice without recording a voice signal, voice recognition may be performed in the set section.

In operation 112, the keywords are extracted by recognizing the voice of the set section. That is, the key word included in the transmitted and received voice signal is extracted by analyzing the voice signal transmitted and received in the voice recognition section set in step 110.

3 is a diagram illustrating a method of extracting a key word according to an exemplary embodiment of the present invention. In an embodiment of the present invention looks at the method of extracting the key words from sentence A "the mathematical reinforcement was caught at 3:30 tomorrow" and sentence B "where is the dermatology you went last time".

In the 300th step, 'Morphological analysis' is performed. That is, the part of speech of each word is determined from the speech signal using the dictionary. For sentence A, the parts of speech of each word are determined as shown at 301 of FIG. 3, and for the sentence B, the parts of speech of each word are determined as shown at 302 of FIG. 3.

In step 310, 'Phrase Chunking' is performed. That is, text is analyzed in units of words based on vocabulary and parts of speech. As shown in FIG. 311, sentence A is classified and analyzed in three phrase units, and sentence B is also classified and analyzed in three phrase units as illustrated in FIG. 312. By using the part-of-speech and phrase information of the analyzed text, a content word containing the meaning of the text, a functional word to simply indicate the grammatical role, a key phrase essential for the meaning transfer, and You can distinguish tubular passages to reinforce meaning. Therefore, the phrases in the text are searched using the survey and the ending, and the key phrases that are the key to the conveyance of meanings are extracted from the found phrases. In sentence A, the key phrases are 'reinforce math' and 'to 3:30 tomorrow', and the key words are 'math', 'reinforcement', 'tomorrow', '3', 'poetry' and 'half'. In sentence B, the key phrases are 'dermatological position' and 'where are you', and the key words are 'dermatology', 'position' and 'where'.

In operation 320, 'keywords extraction' is performed. That is, after extracting the 'core phrase', the key word in the 'core phrase' is extracted. From the extracted key phrases, the keyword extraction template is used to extract key words that reflect the actual meaning. As shown in FIG. 321, the key words extracted from the sentence A are 'math', 'reinforcement', 'tomorrow' and '30: 30 '. Key words extracted from the sentence B are 'dermatology', 'position' and 'where' as shown in FIG.

Referring back to FIG. 1, key words extracted in step 114 are set as a memo of a phone call and stored. The key words extracted in step 112 are words included in a voice signal transmitted and received in a section in which the user determines that the call is important. That is, since the key words extracted in step 112 are important contents in the phone call, the key words extracted in step 112 are set as a memo of the phone call contents and stored.

In step 116, it is checked whether the telephone call is terminated. If the telephone call has ended, step 118 is performed; if the telephone call has not ended, step 102 is performed again. The determination of whether or not to terminate the telephone call is determined based on whether or not a call termination signal is received. That is, when the call termination signal is received, it is determined that the telephone call is terminated. If the call termination signal is not received, the telephone call is determined to be in progress. The call termination signal is generated when the user presses the end button or when the telephone call is terminated by the other party.

In step 118, the key word stored as the 'note' of the phone call is displayed on the screen. As such, when the phone call is ended, by displaying the stored key words on the screen, the user can immediately check the important contents after the call.

4 illustrates key words displayed on a screen according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the keywords extracted according to an embodiment of the present invention are displayed together with the call history 400 in text. Since the key word extracted in the embodiment of the present invention is '30: 30 for the mathematical reinforcement tomorrow ', it is displayed on the screen.

Referring back to FIG. 1, in step 120, a memo displayed on the screen checks whether there are items to be modified or whether there are items to be tagged. As a result of the check, if there are items to be modified or tagged in the memo displayed on the screen, step 122 is performed. If there are no items to be modified or tagged in the memo displayed on the screen, the process ends.

In step 122, if there is an item to be corrected in the memo displayed on the screen, the item is corrected.

5 is a diagram illustrating a method of displaying a call list according to an exemplary embodiment of the present invention.

According to a preferred embodiment of the present invention, the method for displaying a call list is performed in an apparatus in which the call contents are memoized by a method of automatically memorizing important telephone call contents of the call disclosed in FIG. 1.

In step 500, a call list is displayed on the screen. When the call list is displayed by the 500 th step, as shown in FIG. 6A, the call number list 601, 602, 603 to which the user calls is displayed on the screen.

Referring back to FIG. 5, in step 510, a call log is searched from a call list displayed on the screen. The searched call log shows key word memo contents stored in call history such as call time, caller, and phone number. If 602 is searched in the call number list of FIG. 6A, it is displayed as shown in FIG. 6B.

6B is a diagram illustrating a call history displayed on a screen according to an exemplary embodiment of the present invention. If the telephone number searched by the user in the displayed call list of FIG. 6A is "02-466-2465", the memo 616 stored with the call history 610, 612, and 614 is displayed on the screen as shown in FIG. 6B. do.

That is, the key words of the contents of the call in the call history, such as the telephone number 610 "02-465-2465", the caller 612 "Kim Chul-soo", the call date and time (614) "2006.4.4 10:00 PM" searched by the user. "Tomorrow, Gangnam, 12 o'clock, Sun Yi, contact" and the like are displayed in the memo 616.

In step 520, a specific call record is selected from the displayed call list to reproduce the stored voice. That is, when the user selects a specific call record, the recorded voice corresponding to the selected call record is played. In a preferred embodiment of the present invention, when a specific call record is selected, the recorded voice corresponding to the selected call record is played. However, when the user selects a specific number to search from the call list shown in FIG. 6 and presses a separate voice play button on the selected specific number, the voice call content corresponding to the searched specific number is played through the speaker. Can also be used. Since the screen display method according to an embodiment of the present invention is characterized in that not only a key word but also a recorded voice may be reproduced, the voice may be set to be played back when a specific number is selected. It is also possible to set the voice to be played only after pressing the voice play button.

7 is a diagram illustrating an apparatus for automatically memorizing the contents of a phone call according to an exemplary embodiment of the present invention.

According to a preferred embodiment of the present invention, an apparatus for automatically memoizing a phone call content includes a call section setting unit 700, a key word extracting unit 710, and a storage unit 720.

The call section setting unit 700 includes a signal input unit 702 for receiving a control signal. The signal input unit 702 receives the first control signal and the second control signal generated by the button pressed by the user through the input terminal IN 1, and the call section setting unit 700 receives the input first control signal and the second control signal. The call section is set by the control signal. That is, when the telephone call is started, and the user determines that the contents to be called during the telephone conversation is important and needs to be stored as a memo, the user presses the memo save button. When the user presses the memo save button number, a first control signal is generated. When the user determines that all the important content calls have been made, the user releases the memo button. At this time, a second control signal is generated. The signal input unit 702 receives the first control signal and the second control signal through the input terminal IN 1, and the call section setting unit receives a first control signal with respect to the audio signal input through the input terminal IN 2. To the time point at which the second control signal is inputted is set as a call section for interpreting the voice signal.

However, if important call content is already in progress before the user presses the memo save button, the call content before the user presses the memo save button needs to be set as a call section for interpreting the voice signal. Therefore, if a phone call is already in progress before receiving the first control signal, the voice signal is transmitted from the time when the first control signal is received and the first time the voice signal is transmitted and received to the time when the second control signal is received. Set to call interval to interpret.

That is, after the talker presses the memo save button, the speaker finds a point in time when the ongoing conversation is started for the first time, and sets a call interval for interpreting the voice signal from the point to the time when the memo save button is released. As a method of finding the beginning of the conversation, a speech-silence detection algorithm or speaker turn detection may be used.

The keyword extractor 710 extracts a keyword by analyzing a voice signal transmitted and received in the call section set by the call section setting unit 700. The process of extracting the key words is shown in FIG. 3.

The keyword extractor 710 may further include a voice signal recording unit 712 for recording and storing the voice signal transmitted and received in the call section set by the call section setting unit 700 as a voice file. That is, the key word extractor 710 may extract a key word by directly recognizing a call transmitted and received in the call section set in the call section setting unit 700, but extracts a key word through the voice signal recording unit 712. You may. That is, the key word extracting unit 710 includes a voice signal recording unit 712, records a voice signal transmitted / received in the call section set by the call section setting unit 700, stores it as a voice file, and stores the stored voice. You can also use speech recognition to extract keywords.

The storage unit 720 sets the keywords extracted by the keyword extraction unit as memos of the contents of the call and stores them as memos. In addition, the storage unit 720 stores the voice file generated through the voice signal recording unit 712.

The display unit 730 displays a memo stored in the storage unit 720 on the screen when the call ends, such as when the user presses the end button or when the phone call is terminated by the other party. The memo displayed on the screen is as shown in FIG. 4.

If the memo displayed on the screen has something to be corrected, it is corrected by the signal input by the user, and if there is something to be tagged to memorize the memo displayed on the screen, the memo displayed on the screen by the signal input by the user Tag your voice or text. The input signal for modifying or tagging the memo displayed on the screen is input by a button selected by the user.

8 is a diagram illustrating an apparatus for displaying a call list according to an exemplary embodiment of the present invention.

According to an exemplary embodiment of the present invention, a device for displaying a call list includes a call section setting unit 800, a key word extraction unit 810, a storage unit 820, a screen control unit 830, and a display unit 840. do.

According to an exemplary embodiment of the present invention, the call section setting unit 800, the key word extraction unit 810, and the storage unit 820 of the apparatus for displaying the call list of FIG. 8 are illustrated according to an exemplary embodiment of the present invention. 7 is the same device that automatically notes the phone call. Accordingly, the call section setting unit 800 includes a signal input unit 802, and the keyword extraction unit 810 includes a voice signal recording unit 812, and the call section setting unit 800 and the keyword extraction unit 810. And the process performed by the storage unit 820 is the same as the device for automatically memorizing the contents of the phone call of FIG. 7. Therefore, the storage unit 820 stores the keywords extracted by the keyword extracting unit 810 as a memo of the contents of the call, and also stores the voice file recorded by the voice signal recording unit 812.

However, according to an exemplary embodiment of the present invention, the apparatus for displaying the call list of FIG. 8 includes a screen controller 830. When the user searches a call log in the call list displayed on the display unit 840, a control signal for the searched call log is input to the screen controller 830 through the input terminal IN 4. The screen controller 830 adds the memo stored in the storage unit 820 to the corresponding call history, and displays the memo recorded in the call list on the display unit 840. The call history includes a call date, a caller's name, a caller's name, and the like. The display unit 840 displays a memo stored in the storage unit 820 in the call history. The content displayed at this time is as shown in FIG. 6B. In addition, when the user selects a specific call record from the call list displayed on the display unit 840 and presses the voice play button, the screen controller 830 receives a control signal through the input terminal 4 and generates a command corresponding thereto. Play the audio file. In this way, the contents of the call can be stored more accurately by reproducing not only the memo but also the recorded voice on the call record selected by the user.

Meanwhile, the above-described embodiments of the present invention can be written as a program that can be executed in a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium.

In addition, the structure of the data used in the above-described embodiment of the present invention can be recorded on the computer-readable recording medium through various means.

The computer-readable recording medium may be a magnetic storage medium (for example, a ROM, a floppy disk, a hard disk, etc.), an optical reading medium (for example, a CD-ROM, DVD, etc.) and a carrier wave (for example, the Internet). Storage medium).

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the method and apparatus for automatically memorizing the contents of a phone call according to the present invention, a call section for interpreting a voice signal is set, and the voice signal transmitted and received in the set call section is interpreted to be included in the received and received voice signal. After extracting the key words, the extracted key words are set and stored as a memo, so that after the important call contents, the user can automatically memoize the call contents that the user wants to save as text information.

In addition, according to the method and apparatus for displaying a call list according to the present invention, a call section for interpreting a voice signal is set, a voice signal transmitted and received in the set call section is interpreted, and key words included in the transmitted / received voice signal are extracted. After setting and storing the extracted key words as a memo, the stored memo is added to the call history corresponding to the stored memo and displayed as a call list. Also, by checking the key word memo information that can be associated with the call contents, it is possible to check and guess the call contents without listening to all the stored voice contents.

Claims (28)

(a) setting a call interval for interpreting a voice signal; (b) extracting key words included in the transmitted / received voice signal by analyzing a voice signal transmitted and received in the set call period; And and (c) setting and extracting the extracted key words as a memo. The method of claim 1, wherein step (a) (a1) receiving a first control signal; (a2) receiving a second control signal; And (a3) after receiving the first control signal, setting a call interval for interpreting the voice signal from a time point at which the voice signal to be transmitted and received is first transmitted and received to a time point at which the second control signal is received; How to automatically note the contents of the phone call, characterized in that. The method of claim 2, wherein the first control signal and the second control signal is A method of automatically memorizing the contents of a telephone call, which is input by a predetermined button. The method of claim 1, wherein step (a) (a1) receiving a third control signal; (a2) receiving a fourth control signal; And (a3) automatically setting a telephone call content from a time point at which the third control signal is input to a time point at which the fourth control signal is received as a call section for interpreting the voice signal. How to take notes. The method of claim 4, wherein the third control signal and the fourth control signal is A method of automatically memorizing the contents of a telephone call, which is input by a predetermined button. The method of claim 1, wherein step (b) (b1) recording and transmitting a voice signal transmitted and received in the set call interval and storing the voice signal as a voice file; And (b2) analyzing the voice signal of the stored voice file and extracting key words included in the voice signal transmitted and received. The method of claim 1, And when the call ends, displaying the stored memo in response to the call. The method of claim 7, wherein And automatically tagging the displayed memo by voice or text. The method of claim 7, wherein And a step of modifying the displayed memo by a user. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 1 to 9. (a) setting a call interval for interpreting a voice signal; (b) extracting key words included in the transmitted / received voice signal by analyzing a voice signal transmitted and received in the set call period; (c) setting and storing the extracted keywords as a memo; And and displaying the call list by adding the stored memos to the call history corresponding to the stored memos. The method of claim 11, wherein the call history Call list display method characterized in that it comprises at least one or more of the call date, caller name, call number. The method of claim 12, wherein step (b) (b1) recording and transmitting a voice signal transmitted and received in the set call interval and storing the voice signal as a voice file; And and (b2) extracting key words included in a voice signal transmitted and received by interpreting a voice signal of the stored voice file. The method of claim 13, And when a predetermined call history is selected from the displayed call list, reproducing a voice file corresponding to the selected call history from the stored voice files. A non-transitory computer-readable recording medium having recorded thereon a program for executing the method of claim 11. A call section setting unit for setting a call section for interpreting a voice signal; A key word extracting unit for extracting key words included in the transmitted and received voice signals by analyzing voice signals transmitted and received in the set call period; And And a storage unit for storing the extracted key words as a memo. The method of claim 16, wherein the call interval setting unit A signal input unit configured to receive a first control signal and a second control signal, After receiving the first control signal, the telephone call content, characterized in that for setting the call interval for interpreting the voice signal from the time of the first transmission and reception of the voice signal transmitted and received to the second control signal input; A device that automatically notes. The method of claim 17, wherein the first control signal and the second control signal is A device for automatically memorizing the contents of a telephone call, which is input by a predetermined button. The method of claim 16, wherein the call interval setting unit A signal input unit configured to receive a third control signal and a fourth control signal, And a time point for receiving the third control signal to a time point for receiving the fourth control signal as a call section for interpreting the voice signal. The method of claim 19, wherein the third control signal and the fourth control signal is A device for automatically memorizing the contents of a telephone call, which is input by a predetermined button. The method of claim 16, wherein the keyword extraction unit A voice signal recording unit for recording and transmitting the voice signal transmitted and received in the set call interval further comprises a voice file, And a key word included in the voice signal transmitted / received by analyzing the voice signal of the stored voice file. The method of claim 16, And ending the call, the apparatus further comprising a display unit for displaying the stored memo in response to the call. The method of claim 22, Memo displayed on the display unit is a device for automatically memorizing the contents of the phone call, characterized in that tagged by the user by voice or text. The method of claim 22, And a memo displayed on the display unit is automatically modified by the user. A call section setting unit for setting a call section for interpreting a voice signal; A key word extracting unit for extracting key words included in the transmitted and received voice signals by analyzing voice signals transmitted and received in the set call period; A storage unit configured to store the extracted key words as memos; And And a screen controller which adds the stored memos to the call history corresponding to the stored memos and displays them as a call list. 26. The method of claim 25, wherein the call history And at least one of the call date, caller's name, and caller's number. The method of claim 26, wherein the keyword extraction unit A voice signal recording unit for recording and transmitting the voice signal transmitted and received in the set call interval further comprises a voice file, And a key word included in a voice signal transmitted and received by analyzing a voice signal of the stored voice file. The method of claim 27, And when a predetermined call history is selected from the displayed call list, a voice file corresponding to the selected call history is played together from the stored voice files.

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