JP2011134160A - Content retrieval device, program and content retrieval method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a content retrieval device, a program, and a content retrieval method for retrieving target content from a content group with a few operation procedures in a short period of time. <P>SOLUTION: The content retrieval device is equipped with: a display means; a screen switching means for displaying a retrieval screen for retrieving content on the display means; a category specification means for receiving a category specification on the retrieval screen displayed by the screen switching means; a character string specification means for receiving the input of characters of a predetermined number N (N≥2) or less and up to an arbitrary number of characters n (1≤n≤N) from the head of the content of the category specified by the category specification means; and a search means for searching a category content having the character head matching with the character inputted by the character string specification means, from the category specified by the category specification means to display the searched category content on the display means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a content search device that searches for content from a content group, a program that causes a computer to function as each unit in the device, and a content search method suitable for the device.

  In recent years, an audio system has been known in which an external storage medium (for example, a USB memory or a hard disk drive) storing compressed music content or a portable audio player with a built-in hard disk is connected to an in-vehicle audio apparatus and the music content can be reproduced. ing. In addition, the capacity of memory and hard disks has been increasing year by year, and the number of music contents that can be stored has become enormous, so a database of stored music contents can be created and the user can easily search for music intended by the user Audio devices equipped with are known.

  As a music search method using a database, for example, a category such as playlist (Playlist), artist (Artists), album (Albums), song name (Songs), genre (Genres), composer (Composers) is designated. A search method is known. After the user designates a category and performs a search, the user can select a desired music piece by scrolling the screen on which the search result is displayed. In general, search results are sorted and displayed in alphabetical order (character code order).

  When performing a music search using a database, the number of searched music is enormous, and it may take much time to reach the music desired by the user. Therefore, for example, in Patent Document 1, at least the first character of the category content desired by the user (for example, artist name, album name, song name, etc.) is input, and the category content having the same character as the input character at the beginning is input. technology for displaying search and have been disclosed. Using the above-described technology, the user can search for the category content that matches the entered initial character by simply inputting one initial character of the desired category content, and easily reach the desired category content. be able to.

JP 2005-071548 A

  In general, when searching for music by a method of specifying a category, the user first selects, for example, the “Artists” category from the top categories displaying a list of categories. When the “Artists” category is selected, a list of artists stored in the database is displayed on the display unit of the car audio. Next, the user selects the desired artist from the artist list that appears. When an arbitrary artist is selected, a list of albums of the selected artist is displayed. The user selects the desired album from the album, which is displayed in a list. When an arbitrary album is selected, a list of songs recorded in the selected album is displayed. The user selects a desired music from the music displayed in the list.

  As described above, the user performs a search operation for a desired song in order from the top category. For example, there may be a case where the user wants to search for a song by another artist while playing a certain song. In this case, in order to search for the music of another artist, it is necessary to go back to the top category once and perform a new search operation in the order as described above. It took a long time.

  An object of the present invention is to provide a content search apparatus, a program, and a content search method that can search for a target content from a content group with a small number of operation procedures and in a short time.

  The invention described in claim 1 is a content search apparatus for searching for a desired content from a database in which a plurality of contents are classified by a plurality of categories. Means, a screen switching means for displaying a search screen for searching for the content on the display means, a category designation means for accepting designation of the category in the search screen displayed by the screen switching means, A character string designating unit that accepts input of characters up to an arbitrary number of characters n (1 ≦ n ≦ N) equal to or less than a predetermined number N (N ≧ 2) from the top of the category content of the category designated by the category designating unit; From the category specified by the specifying means, the character input by the character string specifying means matches the first character. Explore the categories contents, characterized in that it comprises a search means for displaying on said display means the search category content.

  According to a second aspect of the present invention, in the content search apparatus according to the first aspect, the search means includes a character input from the category specified by the category specification means and the first character input by the character string specification means. When the first category content having the same character is searched and the character input by the character string designating unit is two characters, the character input by the character string designating unit from the first category content The first category content is searched for in the second category content in which the first character matches the first character, and when the characters input by the character string designating means are three characters, the second category content is The first category content is searched for among the category content in which the character input by the character string designating unit matches the first third character.

  The invention according to claim 3 is an in-vehicle device provided with the content search device according to claim 1 or 2.

  According to a fourth aspect of the present invention, there is provided a computer of a content search device for searching for desired content from a database in which a plurality of contents are classified by a plurality of categories, display means, and a search screen for searching for the content. A screen switching means to be displayed on the display means; a search screen displayed by the screen switching means; a category designation means for accepting designation of the category; and a predetermined number from the top of the category contents of the category designated by the category designation means Character string designating means for accepting input of characters up to an arbitrary number n (1 ≦ n ≦ N) of N (N ≧ 2) or less, input from the category designated by the category designating means by the character string designating means. Search for category contents where the first character matches the first character, and the searched category Is a program for searching means for displaying the contents on the display unit functions as a.

  The invention according to claim 5 is a content search method of a content search apparatus for searching for desired content from a database in which a plurality of contents are classified by a plurality of categories, wherein the screen switching means searches for the content. A display screen for searching on the display means, a step in which the category specifying means accepts specification of the category in the search screen displayed by the screen switching means, and a character string specifying means includes the category specifying means Receiving the input of characters up to an arbitrary number of characters n (1 ≦ n ≦ N) equal to or less than a predetermined number N (N ≧ 2) from the top of the category content of the category specified by the specifying unit; From the category specified by the specifying means, the character input by the character string specifying means matches the first character. Explore the categories contents, a step of displaying the searched content category on the display unit, a content retrieval method comprising.

  ADVANTAGE OF THE INVENTION According to this invention, when searching the target content from a content group, there can be provided the content search apparatus, program, and content search method which can search in a short time with few operation procedures.

It is a block diagram showing a schematic configuration of a vehicle audio apparatus 1 according to this embodiment. Is a diagram showing an example of a music database. Is a diagram showing an example of a category classification table. 5 is a flowchart illustrating an example of a character string search process performed in the in-vehicle audio device 1. 5 is a flowchart illustrating an example of a character string search process performed in the in-vehicle audio device 1. Is a diagram showing an example of a direct search mode screen. Is a diagram showing an example of a character input screen. Is a diagram showing an example of a character input screen. Is a diagram showing an example of a character string display screen.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the case where the content search device according to the present invention is applied to an in-vehicle audio device is illustrated. Examples of the in-vehicle audio device include a car stereo device that can reproduce music stored in a portable audio player such as a media such as CD (Compact Disc) and MD (Mini Disc) or iPod (registered trademark).

FIG. 1 is a block diagram showing a schematic configuration of an in-vehicle audio apparatus 1 according to the present embodiment.
As shown in FIG. 1, the in-vehicle audio device 1 includes a display unit 11, an operation unit 12, a storage unit 13, a sound output unit 14, a control unit 15, and an external I / F 16. ing. The in-vehicle audio device 1 can selectively connect the portable audio player 2 or the external storage medium 3 via the external I / F 16.

  The portable audio player 2 is a portable device that records music content in a built-in HDD (Hard Disk Drive) or semiconductor memory, and performs playback processing of the recorded music content. The portable audio player 2 reproduces and outputs the sound indicated by the music content to the output terminal when used alone in the reproduction processing of the music content, and outputs the music content to the in-vehicle audio device 1 when connected to the in-vehicle audio device 1. To output.

  In addition, the portable audio player 2 or the external storage medium 3 stores music contents that can be reproduced by the in-vehicle audio device 1 in a compressed file format such as MP3 (MPEG Audio Layer-3) or WMA (Windows Media (registered trademark) Audio). Remember. Also, the portable audio player 2 or the external storage medium 3 has a music database that stores attribute information (for example, artist name, album name, folder name, file name, playback time, etc.) related to the stored music content by category. I remember it. In the present embodiment, individual attribute information stored for each category in the music database is referred to as category content.

  As shown in FIG. 2, the music database D1 has items of a content ID D11 and a category name D12. The content IDD11 is identification information given to identify the stored music content, and stores attribute information regarding the music content for each category indicated by the category name D12.

  The categories have a hierarchical structure, and for example, there are “Albums” category and “Songs” category as subcategories of “Artists” category. For example, when the “Songs” category positioned at the bottom of the category is designated, the titles of all songs that are the category contents of the “Songs” category are acquired from the song database, and the acquired song titles are displayed on the display unit 11. To display. The acquired music title is subjected to sorting processing, and each music title is assigned a track number in the sort order. The display unit 11 displays a part of all the acquired music titles in the order of track numbers. The user can display a desired music title and select a music by scrolling the music title displayed on the display unit 11.

  The display unit 11 includes a display such as a liquid crystal or an organic EL (Electro Luminescence), for example, and according to a display signal from the control unit 15, the operation mode information, operation information, setting information, and music content of the in-vehicle audio device 1. and it displays various kinds of information such as information on the display. The display unit 11 displays various screens such as a direct search mode screen (FIG. 6), a character input screen (FIGS. 7 and 8), and a character string display screen (FIG. 9) which will be described later.

The operation unit 12 includes an operation key group (for example, a direction instruction key, a determination key, a reproduction key, and the like) for operating the vehicle-mounted audio device 1. Further, when the operation unit 12 receives a press of any operation key by the user, the operation unit 12 generates an operation signal corresponding to the operation key and outputs the operation signal to the control unit 15.
The operation unit 12 includes a direct search key 121. The user can switch the operation mode to the direct search mode by pressing the direct search key 121. The direct search mode is an operation mode in which a display screen (direct search mode screen) for searching for other music desired by the user is displayed on the display unit 11 even when a certain music is being reproduced, for example.

  The storage unit 13 is configured by an HDD, a semiconductor nonvolatile memory, or the like, and stores various setting information of the in-vehicle audio device 1. Further, the storage unit 13 stores display data (operation mode information, operation information, setting information, playlist information, music information of music content, etc.) to be displayed on the display unit 11. The storage unit 13 also stores a category type table that defines the correspondence between icons displayed on the display unit 11 and categories.

  As shown in FIG. 3, the category type table T1 has items of an icon T11 and a category name T12. The icon T11 includes a playlist icon I1 indicating that the “Playlist” category is specified, an artist icon I2 indicating that the “Artists” category is specified, and an album indicating that the “Albums” category is specified. Icon I3, music icon I4 indicating that the “Songs” category is specified, podcast icon I5 indicating that the “Podcasts” category is specified, and genre icon I6 indicating that the “Genres” category is specified , A composer icon I7 indicating that the “Composers” category is designated.

  The audio output unit 14 outputs audio based on the audio signal output from the control unit 15.

The control unit 15 includes, for example, a CPU (Central Processing Unit) 151, a RAM (Random Access Memory) 152, a ROM (Read Only Memory) 153, a DSP (Digital Signal Processor) 154, and the like. To control.
The CPU 151 reads out a processing program stored in the ROM 153, expands it in the RAM 152, and executes various processes in cooperation with the expanded program, thereby controlling the in-vehicle audio apparatus 1 as a whole.
The RAM 152 expands the processing program executed by the CPU 151 in the program storage area in the RAM 152, and stores the input data and the processing result generated when the processing program is executed in the data storage area.
The ROM 153 is composed of, for example, a semiconductor memory, and stores a processing program, data, and the like in advance. In the ROM 153, for example, on a search screen for searching for content, a search is made for a category content in which characters from the top of the category content of the category specified by the user to an arbitrary number of characters equal to or less than a predetermined number match the characters in the top portion. A character string search program for displaying the searched category contents on the display means is stored.
The DSP 154 performs digital signal processing such as decoding and sound quality adjustment on the music content acquired from the portable audio player 2 or the external storage medium 3.

  Further, the control unit 15 reads the music content when an instruction to reproduce the music content recorded in the portable audio player 2 or the external storage medium 3 connected via the external I / F 16 is given by a user operation. , Converted to an analog audio signal and output to the audio output unit 14. The control unit 15 has a function of searching for desired category contents from a music database stored in the portable audio player 2 or the external storage medium 3 connected via the external I / F 16. The function of searching for category contents is realized by inputting a character string at the beginning of desired category contents and searching for category contents that match the character string at the beginning.

  The external I / F 16 transmits and receives music content and the like according to a format determined between the portable audio player 2 or the external storage medium 3.

Next, the operation of the in-vehicle audio device 1 according to this embodiment will be described.
4 and 5 are flowcharts showing an example of a character string search process performed in the in-vehicle audio device 1. This character string search process is realized by the CPU 151 executing a character string search program stored in the ROM 153, triggered by the on-vehicle audio device 1 being powered on. Here, a case where the portable audio player 2 is connected to the vehicle-mounted audio device 1 will be described as an example.

First, as shown in FIG. 4, it is determined whether or not the user has pressed the direct search key 121 (step S1). If it is determined that the user has pressed the direct search key 121 (step S1: YES), a screen for the direct search mode is displayed on the display unit 11 (step S2).
As shown in FIG. 6, the direct search mode screen 1a includes a category display area E1 at the left end of the screen. The category display area E1 is an area for displaying an icon indicating the currently selected category. When switching to the direct search mode is performed, the playlist icon I1 is displayed by default in the category display area E1. On the direct search mode screen 1a, the user first performs an operation for selecting an icon indicating a category to be searched. The icon selection operation is performed, for example, by sequentially switching the icons by pressing a direction instruction key and pressing the enter key when a desired icon is displayed.
On the other hand, if it is determined that the user has not pressed the direct search key 121 (step S1: NO), no processing is performed and the direct search key 121 is pressed.

When the direct search mode screen is displayed, it is determined whether or not the user has selected a category (step S3). If it is determined that the user has selected a category (step S3: YES), the selected category is designated for the music database stored in the portable audio player 2 connected via the external I / F 16. Perform (step S4). Further, a character input screen is displayed on the display unit 11 (step S5).
That is, when the user selects a category on the direct search mode screen 1a shown in FIG. 6, for example, a character input screen 1b as shown in FIG. 7 is displayed. The character input screen 1b includes, in order from the left, a category display area E1, a character input area E2, and a confirmed icon display area E3. The character input area E2 is an area in which up to three letters can be input. The confirmation icon display area E3 is an area for displaying a confirmation icon I8 for confirming the character input in the character input area E2. For example, when the user has selected the “Artists” category, an artist icon I2 is displayed in the category display area E1. Immediately after the category is selected, a single “A” character is displayed in the character input area E2, and a confirmed icon I8 is displayed in the confirmed icon display area E3 by default. FIG. 8 is a diagram showing an example of a screen in which the user has input three characters “FAT” in the character input area E2. In this case, the character input screen 1c includes a category display region E1, a character input region E2, and a confirmed icon display region E3 in order from the left as in the character input screen 1b shown in FIG. Character input is performed, for example, by sequentially switching characters by pressing a direction instruction key and pressing a decision key when a desired character is displayed. When the input of the first character is completed, the second character can be input. When the input of the second character is completed, the third character can be input. When the determination key is pressed without performing character input on the character input screen for the second and subsequent characters, the confirmation icon I8 can be selected, and the character input can be confirmed by pressing the determination key. Similarly, when the input of the third character is completed, the confirmation icon I8 can be selected, and the character input can be confirmed by pressing the enter key.
On the other hand, if it is determined that the user has not selected a category (step S3: NO), no processing is performed, and the selection of a category is awaited.

  When the character input screen is displayed, it is determined whether or not the user has finished character input (step S6). This determination is performed by determining whether or not the user has pressed the confirmation icon I8. If it is determined that the user has pressed the confirmation icon I8, it is determined that the user has finished inputting characters (step S6: YES), and the music classified into the designated category from the music database of the portable audio player 2 is determined. A character string of the content (category contents such as artist name and music title) is acquired (step S7). On the other hand, if it is determined that the user has not pressed the confirmation icon I8, it is determined that the user has not finished character input (step S6: NO), and the end of character input is awaited.

  When the character string of the music content is acquired, the character code of the character constituting the acquired character string is converted to UTF-16 (Unicode Transformation Format 16) (step S8). The character strings of the music content converted to UTF-16 are sorted in the order of the character codes, and the track numbers are given in the order of sorting.

  Next, as shown in FIG. 5, the first and last character strings in the character string group in which the first character of the acquired character string matches the first character of the search designation character (that is, the track number is the first character). And the last one) are searched using the binary search method (step S9: binary search process). For example, if the search designated character is “FAT”, the first and last track numbers are searched for in the character string group in which the first character of the acquired character string is “F”.

  Next, it is determined whether or not the first and last track numbers have been acquired as a result of the binary search process in step S9 (step S10). When it is determined that the first and last track numbers have not been acquired (step S10: NO), the search is performed using the linear search method to acquire the track number (step S11: linear search process). On the other hand, if it is determined that the first and last track numbers have been acquired (step S10: YES), whether or not the second character is designated for search, that is, whether or not the user has input the second character on the character input screen. Is determined (step S12). If the second character is specified for search (step S12: YES), the first and last track numbers in the character string group in which the second character of the acquired character string matches the second character of the specified search character Are searched using a binary search method (step S13: binary search process). For example, when the search designation character is “FAT”, the first and last track numbers are searched for in the character string group in which the first character is “F” and the second character is “A”. On the other hand, if the second character is not designated for search (step S12: NO), the process proceeds to step S20.

  Next, it is determined whether or not the first and last track numbers have been acquired as a result of the binary search process in step S13 (step S14). If it is determined that the first and last track numbers have not been acquired (step S14: NO), the search is performed using the linear search method to acquire the track number (step S15: linear search process). On the other hand, if it is determined that the first and last track numbers have been acquired (step S14: YES), whether or not the third character is designated for search, that is, whether or not the user has input the third character on the character input screen. Is determined (step S16). If the third character is specified for search (step S16: YES), the character string group in which the third character of the acquired character string matches the third character of the specified search character is the one with the first track number. Search is performed using a binary search method (step S17: binary search process). For example, if the search designated character is “FAT”, the first track number is searched for in the character string group in which the first character is “F”, the second character is “A”, and the third character is “T”. . On the other hand, if the third character is not designated for search (step S16: NO), the process proceeds to step S20.

  Next, it is determined whether or not the first track number has been acquired as a result of the binary search process in step S17 (step S18). When it is determined that the first track number has not been acquired (step S18: NO), the search is performed using the linear search method, and the first track number is acquired (step S19: linear search process). Then, the character string with the acquired track number is displayed on the display unit 11 (step S20). On the other hand, if it is determined that the first track number has been acquired (step S19: YES), the character string with the acquired track number is displayed on the display unit 11 (step S20). Similarly, when the second character is not specified for search (step S12: NO) and when the third character is not specified for search (step S16: NO), the first track number acquired immediately before is also specified. and displays the character string that is attached to the display unit 11 (step S20). For example, when the search designation character is “FAT” and the character string (here, artist name) to which the acquired track number is attached is “FATBY SLIM”, a character string display screen 1d as shown in FIG. Is displayed on the display unit 11.

  Thereafter, the user can reproduce the music by scrolling the character string display screen on which the music title is displayed, if necessary, and pressing the selection key in accordance with the desired music title. That is, the control unit 15 designates the content ID of the music title whose selection key is pressed, reads the music content corresponding to the content ID from the portable audio player 2, performs signal processing such as decoding, and plays the reproduced sound as audio. Output from the output unit 14.

  As described above, the in-vehicle audio device 1 according to the present embodiment includes the display unit 11, the operation unit 12 including the direct search key 121, and the control unit 15. The operation unit 12 accepts designation of a desired category on the search screen displayed by pressing the direct search key 121, and is equal to or less than a predetermined number N (N ≧ 2) from the top of the category contents of the designated category. The input of characters up to an arbitrary number n of characters (1 ≦ n ≦ N) is accepted. The control unit 15 searches the category specified by the operation unit 12 for a category content in which the character input by the operation unit 12 matches the first character, and causes the display unit 11 to display the searched category content. .

  That is, since the user can display a screen for performing category designation search by pressing the direct search key 121, a desired search can be performed without going back to the top category. Therefore, the user can perform a search operation in a short time with fewer operation procedures.

  In addition, the control unit 15 searches the category specified by the operation unit 12 for the first category content in which the character input by the operation unit 12 and the first character match. When there are two characters input by the operation unit 12, the first category among the second category contents in which the character input by the operation unit 12 matches the first character from the first category content. Explore the contents. When there are three characters input by the operation unit 12, the first character string is searched for from the category content in which the character input by the operation unit 12 and the first third character match from the second category content. To do.

  That is, since a maximum of the third character from the top of the category content to be searched can be designated as a search target, the user can easily search for a desired music piece.

  As mentioned above, although concretely demonstrated based on embodiment which concerns on this invention, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

  For example, in the above-described embodiment, the case where the character string search device is applied to an in-vehicle audio device has been described as an example. However, in addition to this, a television device that reproduces video and audio of a television broadcast, DVD (Digital Versatile Disc) Playing content that can be applied to a playback device that plays back stored video and audio, a vehicle mounted on a vehicle, a car navigation system that plays back images, audio, and portable music playback players, etc. In addition, the apparatus is not limited to those exemplified above as long as the apparatus can perform a search using a database. In this case, the character string to be searched for is the title name or genre name of the content.

  In the above-described embodiment, the music category designation search is performed using the music database stored in the portable audio player 2 or the external storage medium 3, but the present invention is not limited to this. For example, when the portable audio player 2 or the external storage medium 3 is connected via the external I / F 16, the music database may be acquired and stored in the storage unit 13.

  Moreover, in the said embodiment, although the character input into the character input area E2 is limited to an alphabet, it is not limited to this. For example, it is also possible to input numbers and Chinese characters, symbols and the like.

  Moreover, in the said embodiment, although the number of characters inputted into the character input area E2 is made into a maximum of 3 characters, it is not limited to this. In particular, in an apparatus capable of configuring a wide character input area E2, more characters can be input, and thus the search result can be further narrowed down.

  In the above embodiment, when only two characters are specified by the user, the first track number and the last track number that match the second character are acquired (step 14 in FIG. 5). , it may be acquired only the first track number.

  In addition, the detailed configuration and detailed operation of each device constituting the in-vehicle audio device 1 can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 In-vehicle audio apparatus 11 Display part 12 Operation part 13 Storage part 14 Audio | voice output part 15 Control part 151 CPU
152 RAM
153 ROM
154 DSP
16 External I / F
2 Portable audio player 3 External storage medium

Claims (5)

A content search apparatus for searching for desired content from a database in which a plurality of contents are classified by a plurality of categories,
Display means;
Screen switching means for causing the display means to display a search screen for searching for the content;
In the search screen displayed by the screen switching means, category designation means for accepting designation of the category;
A character string designating unit that accepts input of characters up to an arbitrary number of characters n (1 ≦ n ≦ N) equal to or less than a predetermined number N (N ≧ 2) from the top of the category contents of the category designated by the category designating unit;
Search means for searching for category contents in which the character input by the character string specifying means matches the first character from the category specified by the category specifying means, and displaying the searched category contents on the display means When,
A content search apparatus comprising: The search means includes
From the category specified by the category specifying means, search for a first category content in which the character input by the character string specifying means and the first character match,
When there are two characters input by the character string designating means, the second category content in which the first character is the same as the character entered by the character string designating means from the first category content. Search for the first category in
When there are three characters input by the character string designating means, the first of the category contents in which the character inputted by the character string designating means and the first three characters match from the second category content The content search apparatus according to claim 1, wherein the content of the category is searched.   Vehicle equipped with a content search device according to claim 1 or 2. A computer of a content search apparatus that searches for desired content from a database in which a plurality of contents are classified by a plurality of categories,
Display means,
Screen switching means for causing the display means to display a search screen for searching for the content;
In the search screen displayed by the screen switching means, category designation means for accepting designation of the category,
A character string designating unit which accepts input of characters up to an arbitrary number of characters n (1 ≦ n ≦ N) equal to or less than a predetermined number N (N ≧ 2) from the top of the category contents of the category designated by the category designating unit;
Search means for searching for category contents in which the character input by the character string specifying means matches the first character from the category specified by the category specifying means, and displaying the searched category contents on the display means ,
Program to function as. A content search method of a content search apparatus for searching for desired content from a database in which a plurality of contents are classified by a plurality of categories,
A step of causing the display switching means to display a search screen for searching for the content on the display means;
A category designation unit accepting designation of the category on the search screen displayed by the screen switching unit;
A step of accepting input of characters up to an arbitrary number of characters n (1 ≦ n ≦ N) equal to or less than a predetermined number N (N ≧ 2) from the top of the category contents of the category designated by the category designating unit; When,
The search means searches the category specified by the category specifying means for category contents in which the character input by the character string specifying means matches the first character, and the searched category contents are displayed on the display means. A process of displaying;
Content search method including

Images