JP2011096335A - Content specifying device and program of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To specify a content body of selected content out of broadcasting data including a plurality of contents which are recorded in a storage medium. <P>SOLUTION: A content specifying device includes a means for obtaining a whole reproducing time TIME of formal content for content, a means for specifying a start time S_TIME and a finish time E_TIME in content by music recognition technology, a means for specifying a reproducing time Z_TIME being a time from a broadcasting start time until a broadcasting finish time based on a Cue sheet, and a means for specifying a start time C_S_TIME of the content body and a finish time C_E_TIME of the content body based on the whole reproducing time TIME, the start time S_TIME. the finish time E_TIME, and the reproducing time Z_TIME. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a content specifying device for specifying a content body of a selected content from broadcast data including a plurality of content recorded in a storage medium.

  A content recording / playback apparatus such as an HDD recorder or a PC records content such as music or video broadcast on a radio or television on a storage medium such as an HDD, and plays back the content selected from the recorded broadcast data file. be able to. However, the user does not know when the desired content will be broadcast. For example, in FM radio broadcasting, it may be known in advance that a desired song is broadcast in a program, but since CM and DJ are included in the program, when the desired song is broadcast in the program I do not know until.

  In order to solve this problem, the following Patent Application 1 proposes a content recording / playback apparatus that extracts and plays back a desired song using a cue sheet. This content recording / playback apparatus acquires a cue sheet describing a broadcast start time, a song name, and the like of a broadcasted song from a server. The content recording / playback apparatus always receives FM broadcasts and records all received broadcast data on the HDD. Then, referring to the cue sheet, a desired song is extracted from the recorded broadcast data and reproduced.

  Here, the broadcast end time of each song on the cue sheet is the broadcast start time of the next song. Therefore, when a desired song is extracted and reproduced with reference to the cue sheet, audio data other than the song body such as CM, DJ, and news may be included after the song body. In addition, the broadcast start time of each song on the cue sheet is described in minutes instead of seconds, and it is specified that the song is always broadcast within one minute from the broadcast start time described in the cue sheet. . In other words, the cue sheet broadcast start time may have a maximum time lag of 1 minute from the actual broadcast start time of the song. Therefore, when a desired song is extracted and reproduced with reference to the cue sheet, audio data other than the song body such as CM, DJ, and news may be included before the song body. When the user wants to listen only to the song main body, it is necessary to fast-forward audio data other than the song main body by a user operation, which is very complicated.

JP 2007-59035 A

  The present invention has been made to solve the above-described conventional problems, and its purpose is to identify the content body of the selected content from broadcast data including a plurality of content recorded in a storage medium. It is to provide a content specifying device.

  A content specifying device according to a preferred embodiment of the present invention is a content specifying device for specifying a content body of a selected content from broadcast data including a plurality of content recorded in a storage medium, the content specifying device Means for obtaining the total playback time TIME of the formal content for the content, means for specifying the start time S_TIME and the end time E_TIME of the content body in the content by music recognition technology, and starting the broadcast of the content based on the cue sheet Means for specifying a playback time Z_TIME that is a time from the time to the broadcast end time, and based on the total playback time TIME, the start time S_TIME, the end time E_TIME, and the playback time Z_TIME, the content body start time C_S_TIME and Means for specifying the end time C_E_TIME of the content body.

  By using the total playback time TIME, start time S_TIME, end time E_TIME, and playback time Z_TIME, the start time C_S_TIME of the content body and the end time C_E_TIME of the content body can be specified. Therefore, when the content to be played back is selected, the content body start time C_S_TIME to the content body end time C_E_TIME are extracted and played back, so that the fast-forwarding operation is not performed by the user operation. Only the content body can be played.

  In a preferred embodiment, when the start time S_TIME is smaller than a predetermined value, the means for setting the start time S_TIME to the start time C_S_TIME, and when the start time S_TIME is equal to or greater than the predetermined value, the start time Means for setting the predetermined value to C_S_TIME.

  If the start time S_TIME is greater than or equal to the specified value, the S_TIME acquired by the music recognition technology may be incorrect. By specifying the specified value for the start time C_S_TIME, the content body can be specified more accurately. Can do.

  In a preferred embodiment, when the end time E_TIME is smaller than the total reproduction time TIME + the predetermined value and the end time E_TIME is smaller than the reproduction time Z_TIME, the end time E_TIME is set to the end time C_E_TIME. And a means for performing.

  In this case, since E_TIME acquired by the music recognition technology is determined to be correct, the content body can be specified more accurately by setting the end time E_TIME to the end time C_E_TIME.

  In a preferred embodiment, when the end time E_TIME is smaller than the total playback time TIME + the predetermined value and the end time E_TIME is equal to or longer than the playback time Z_TIME, the playback time Z_TIME is set to the end time C_E_TIME. And a means for performing.

  In this case, since E_TIME acquired by the music recognition technology may be incorrect, the content body can be specified more accurately by setting the playback time Z_TIME to the end time C_E_TIME.

  In a preferred embodiment, when the end time E_TIME is equal to or greater than the total playback time TIME + the predetermined value, and the playback time Z_TIME is greater than the total playback time TIME + the predetermined value, the total playback at the end time C_E_TIME. And means for setting the playback time Z_TIME to the end time C_E_TIME when the time TIME + the predetermined value is set and the playback time Z_TIME is equal to or less than the total playback time TIME + the predetermined value.

  In this case, the E_TIME acquired by the music recognition technology may be incorrect, so the content body can be specified more accurately by setting the total playback time TIME + predetermined value or the playback time Z_TIME as the end time C_E_TIME. can do.

  In a preferred embodiment, when the playback time Z_TIME is less than or equal to the total playback time TIME, the broadcast start time specified by a cue sheet is set to the start time C_S_TIME, and the broadcast end time is set to the end start time C_E_TIME. And a means for setting.

  In a preferred embodiment, when C_TIME, which is the time from the start time C_S_TIME to the end start time C_E_TIME, is larger than the total playback time TIME, the start time C_S_TIME is delayed by (C_TIME−TIME) ÷ 2, and the end A means for advancing the time C_E_TIME by (C_TIME−TIME) ÷ 2 is further provided.

  In this case, since the playback time of the content body is longer than the total playback time of the formal content, the playback time of the content body can be made the same as the total playback time of the official content. Also, the content body can be specified more accurately by delaying the start time C_S_TIME by the same time and increasing the end start time C_E_TIME.

  It is possible to provide a content specifying device that specifies a content body of content selected from broadcast data including a plurality of contents recorded in a storage medium.

1 is a block diagram illustrating a content recording / playback apparatus according to a preferred embodiment of the present invention. It is a figure which shows an example of a cue sheet. It is a figure which shows the state which manages the reproduction start value of each music based on a cue sheet. It is a figure which shows an example of a music list. It is a flowchart which shows the process from recording of broadcast data to music list display. It is a flowchart which shows the process which specifies a music body. It is a figure explaining reproduction time Z_TIME, total reproduction time TIME, etc. It is a figure which shows an example of the specific result of the music main body in the process of FIG. It is a figure which shows an example of the specific result of the music main body in the process of FIG. It is a figure which shows an example of the specific result of the music main body in the process of FIG. It is a flowchart which shows the process which extracts and reproduces | regenerates the music main body.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to these embodiments.

  FIG. 1 is a block diagram showing a content recording / playback system according to a preferred embodiment of the present invention. The content recording / playback system includes a content recording / playback apparatus (content specifying apparatus) 1, a server (queue sheet server) 100, and a server (content information server) 200. The content recording / reproducing apparatus 1 receives broadcast data such as radio and TV (hereinafter referred to as radio broadcast data), and records the broadcast data for every predetermined time on the HDD 3 as a broadcast data file. The server 100 acquires and holds cue sheets (program progress tables) for a plurality of broadcast station servers (not shown). The content recording / playback apparatus 1 acquires a cue sheet from the server 100, extracts a desired song from the recorded broadcast data file based on the cue sheet, and plays it. The server 200 manages the total playback time of the official song (a song recorded on a commercially available CD) in association with the metadata of the song (in this example, a combination of artist name and song name).

The content recording / playback apparatus 1 includes a control unit 2, an HDD (Hard
Disk Drive) 3, memory (ROM and / or RAM) 4, reproduction unit 5, reception unit 6, communication unit 7, operation unit 8, and display unit 9. The control part 2 performs each process shown below based on the content specific program stored in the memory 4, for example, is a microcomputer, CPU, etc.

  The receiving unit 6 receives broadcast data including a plurality of contents broadcast from a broadcast station (not shown). Content is a general term for data such as music (music), video, and / or still images, and is music data in this example. The broadcast is a TV broadcast or a radio broadcast, and any broadcast such as a digital broadcast, an analog broadcast, a satellite broadcast, or an Internet broadcast can be adopted. In this example, an FM broadcast including a plurality of song data will be described as an example.

  The HDD 3 records the broadcast data received by the receiving unit 6 according to an instruction from the control unit 2. Although not particularly limited, the broadcast data is divided into broadcast data files every predetermined time (for example, 6 hours) and recorded in the HDD 3. When a song is reproduced, a portion corresponding to the song is extracted from the broadcast data file based on the cue sheet and reproduced.

  The communication unit 7 connects to the server 100 via an arbitrary telecommunication line such as the Internet, and acquires a cue sheet from the server 100. FIG. 2 is a diagram illustrating an example of the cue sheet of the broadcasting station X. The cue sheet includes a broadcast station name, an artist name, a song name, a broadcast start time, and a broadcast end time. The broadcast end time is the broadcast start time of the next song. For example, for the broadcast station X, it is shown that the song with the artist name A and the song name aaa was broadcast from 17:00 to 17:10 on January 1, 2009. In addition, the communication unit 7 connects to the server 200 via an arbitrary telecommunication line such as the Internet, and acquires the total reproduction time of the official music from the server 200.

  As shown in FIG. 3, the reproduction start address of each song is managed on the HDD 3 in the broadcast data file recorded on the HDD 3 based on the broadcast start time and the broadcast end time described in the cue sheet. For example, it is managed that a song with artist name A and song aaa has a relative address 0 to 24533 bytes of the broadcast data file, and a song with artist name B and song bbb has a relative address 24533 to 54232 bytes of the broadcast data file. The

  As shown in FIG. 4, a song list that is a list of artist names and song names of each song is displayed on the display unit 9 based on the cue sheet. When a desired song is selected from the song list by a user operation, the playback unit 5 extracts and plays the selected song from the broadcast data file based on the cue sheet.

  For each song displayed in the song list, the control unit 2 specifies the start time and end time of the song body among the song data specified from the broadcast start time to the broadcast end time of the cue sheet, and stores them in the memory 4. Remember. As described above, the music data specified from the broadcast start time to the broadcast end time of the cue sheet includes audio data such as CM, DJ, news, and the like. The song main body is data of only the song portion excluding the audio data such as CM, DJ, news and the like.

  The control unit 2 transmits the artist name and song name of the song to the server 200, and obtains the total playback time TIME of the official song. In addition, the control unit 2 specifies the start time S_TIME and the end time E_TIME of the song main body among the song data specified from the cue sheet, using a well-known music recognition technique (for example, Japanese Patent No. 3156975). In addition, the control unit 2 specifies the reproduction time Z_TIME from the broadcast start time to the broadcast end time on the cue sheet. Then, the control unit 2 uses the total playback time TIME, start time S_TIME, end time E_TIME, and playback time Z_TIME to specify the start time C_S_TIME and the end time C_E_TIME of the music body by the method described in detail below. When a song is selected from the song list by a user operation, the reproducing unit 5 extracts and reproduces data from the start time C_S_TIME to the end time C_E_TIME of the song main body specified by the control unit 2 from the broadcast data file.

  The operation of the present invention will be described below. FIG. 5 is a flowchart showing processing of the control unit 2 when recording broadcast data and displaying a song list. The control unit 2 causes the receiving unit 6 to receive the broadcast data of the broadcast station selected by the user operation, and starts recording the broadcast data on the HDD 3 (S301). When a recording stop instruction is input by a user operation, the control unit 2 ends recording of broadcast data in the HDD 3 and records it in the HDD 3 as one broadcast data file (S302).

  The control unit 2 accesses the server 100, acquires a cue sheet corresponding to the broadcast data recorded in the HDD 3 in S1 and S2 from the server 100, and stores it in the HDD 3 (S303). Based on the broadcast start time and broadcast end time of each song described in the cue sheet, the control unit 2 determines the playback start position of each song in the broadcast data file (the beginning of the broadcast data file) as shown in FIG. Relative address in case of 0 byte) is calculated and stored in the database of HDD 3 (S4). More specifically, the specific information (file name) and the reproduction start position of the broadcast data file including each song file are managed in a database stored in the HDD 3.

  Subsequently, the control unit 2 generates a song list which is a list of artist names and song names of each song based on the cue sheet, and causes the display unit 9 to display the song list. In the song list, songs may be arranged in order of broadcast date and time, or only songs of a desired artist may be arranged.

  FIG. 6 is a flowchart showing a process of specifying the music body among the music data specified by the broadcast start time and the broadcast end time described in the cue sheet. The control unit 2 executes a loop process for each song included in the song list (S601). That is, the following processing is sequentially executed for each song included in the song list.

  The control unit 2 selects one song included in the song list, specifies the artist name and song name from the cue sheet, and transmits them to the server 200 via the Internet (S602). Upon receiving the artist name and the song title, the server 200 identifies the official song from the artist name and the song title, reads the total playback time of the identified official song from the database, and returns it to the content recording / playback apparatus 1. When acquiring the total playback time of the official song, the control unit 2 stores the total playback time TIME in the memory 4 (S603).

  Next, the control unit 2 uses the music recognition technique described above, specifies the music body from the music data specified by the cue sheet, and stores the start time S_TIME and the end time E_TIME in the memory 4. (S604). Note that the start time S_TIME and the end time E_TIME are calculated as relative values when the broadcast start time described in the cue sheet is set to 0 for convenience. Next, the control unit 2 stores the reproduction time from the broadcast start time to the broadcast end time in the cue sheet of the song in the memory 4 as Z_TIME (S605). For example, in the case of artist name A and song name aaa in the cue sheet of FIG. 2, since the broadcast start time 2009/1/1/17: 00 and the broadcast end time 2009/1/1/17: 10, the playback time Z_TIME is 10 minutes. In other words, the reproduction time Z_TIME is equivalent to the broadcast end time when the broadcast start time in the cue sheet is set to 0.

  FIG. 7 is a diagram showing the relationship between the values stored in the memory 4. The horizontal axis indicates time, and the broadcast start time described in the cue sheet is described as t = 0 for each song. When the song body starts earliest, the song body is from t = 0 to TIME, and when the song body starts latest, the song body is from t = 1 to 1 + TIME. This is because the broadcast station stipulates that the song is broadcast within one minute at the latest from the broadcast start time described in the cue sheet. Therefore, the song always ends within the maximum t = 1 + TIME. In the following, songs with a TIME of less than 1 minute will not be broadcast.

  Returning to FIG. 6, the control unit 2 determines whether Z_TIME is greater than TIME (S606). If Z_TIME is smaller than TIME (NO in S606), even if the song body is broadcast from t = 0, not all of the song body is broadcast and only a part is broadcast. Accordingly, all data from t = 0 to Z_TIME is set as the music body (S607), that is, the broadcast start time on the cue sheet is set to the start position C_S_TIME, the broadcast end time is set to the end position C_E_TIME, and the process is terminated. .

  On the other hand, when Z_TIME is larger than TIME (YES in S606), the control unit 2 determines whether S_TIME is smaller than 1 (S608). That is, it is determined whether or not the start time of the music body specified by the music recognition technology is smaller than a predetermined time (predetermined value, 1 minute in this example) defined by the broadcasting station. If S_TIME is 1 minute or longer (NO in S608), the condition that the song starts broadcasting within one minute from the broadcast start time described in the cue sheet is inconsistent with the result of the music recognition technology. In this case, since the result of the music recognition technique is incorrect, 1 (minute) which is a predetermined time is set as the start time C_S_TIME of the music body (S609). That is, the start time is set to 1 minute which is the maximum delay time of the music. In this example, setting means storing in the memory 4.

  In S608, when S_TIME is smaller than 1 (YES in S608), the start time of the music body based on the music recognition technology is included within the predetermined time defined by the broadcasting station. Therefore, the control unit 2 sets S_TIME to C_S_TIME (S610), and the start time of the music body specified by the music recognition technique is set as the start time of the music body as it is.

  Next, the control unit 2 determines whether E_TIME is smaller than 1 + TIME (S611). When E_TIME is 1 + TIME or more (NO in S611), the end time of the music body specified by the music recognition technology can be taken based on the predetermined time specified by the broadcasting station and the total playback time of the official music It is judged that the maximum value of is exceeded. In this case, the control unit 2 further determines whether Z_TIME is larger than 1 + TIME (S615).

  When Z_TIME is larger than 1 + TIME (YES in S615), the control unit 2 sets the music body end time C_E_TIME = 1 + TIME (S616). That is, since the end time of the song body does not exceed 1 + TIME, 1 + TIME is set to C_E_TIME. On the other hand, when Z_TIME is 1 + TIME or less (NO in S615), the control unit 2 sets E_TIME = Z_TIME (S613), and E_TIME (= Z_TIME) is set to C_E_TIME (S614). That is, the smaller of Z_TIME and 1 + TIME is set to C_E_TIME.

  On the other hand, if E_TIME is smaller than 1 + TIME (YES in S611), that is, the end time of the music body by the music recognition technology is the end time based on the predetermined time defined by the broadcasting station and the total playback time of the official music If it is within the maximum value, the control unit 2 determines whether E_TIME is smaller than Z_TIME (S612). That is, it is determined whether or not the end time of the music body by the music recognition technology is within the broadcast end time on the cue sheet.

  When E_TIME is equal to or greater than Z_TIME (NO in S612), the control unit 2 sets E_TIME = Z_TIME, and makes E_TIME equal to the maximum value Z_TIME so as not to exceed Z_TIME (S613). Thereafter, the control unit 2 sets C_E_TIME = E_TIME (= Z_TIME) (S614). On the other hand, when E_TIME is smaller than Z_TIME (YES in S612), the control unit 2 sets C_E_TIME = E_TIME (S614). Through the above processing, C_S_TIME and C_E_TIME are specified.

  In the following processing, it is checked whether or not the music body specified by C_S_TIME and C_E_TIME is valid. First, the control unit 2 executes a subtraction process of (C_E_TIME−C_S_TIME) and sets this result as C_TIME (S617). That is, the reproduction time (length) of the music body determined by the above processing is set to C_TIME.

  The control unit 2 determines whether C_TIME is equal to or less than TIME (S618). That is, it is determined whether the playback time of the specified music body is within the total playback time TIME of the official music. If C_TIME is equal to or less than TIME (YES in S618), C_E_TIME and C_S_TIME are specified as the start time and end time of the song body as they are, and the process ends.

  On the other hand, if C_TIME is greater than TIME (NO in S618), that is, if the playback time of the song body is greater than the total playback time of the official song, the control unit 2 calculates C_TIME-TIME = DIF_TIME (S619). . Then, the control unit 2 moves (delays) the start time C_S_TIME of the song main body by 1/2 of DIF_TIME and moves the end time C_E_TIME by 1/2 of DIF_TIME (advances) (S620). Thereby, the length of C_TIME can be matched with TIME. The reason why the start time is delayed and the end time is advanced is that the central part of the music body can be extracted and the possibility of extracting the central part of the music can be increased. Through the above processing, the music body can be specified more accurately from the music recognition technique, the broadcast start time and broadcast end time of the cue sheet, and the total playback time of the official music.

  8-10 is a figure which shows an example of the specific result of the music main body in the process of the said FIG. The line shown in (1) shows the part finally specified as the music body (data from C_S_TIME to C_E_TIME). The line shown in (2) is a line indicating the data size of the official music having the total playback time TIME for reference. The line shown in (3) is a line in which data from S_TIME to E_TIME (value obtained in S604) acquired by the music recognition technology is described as it is.

  FIG. 8 shows an example in which appropriate S_TIME and E_TIME can be acquired by the music recognition technology. In FIG. 8, the pattern is determined when YES is determined in S606, YES is determined in S608, YES is determined in S611, YES is determined in S612, and YES is determined in S618. It can be seen that S_TIME and E_TIME acquired in S604 are set as C_S_TIME and C_E_TIME of the song body as they are.

  FIG. 9 shows an example in which S_TIME and E_TIME are determined to be invalid and the playback time of the song body exceeds the total playback time. In FIG. 9, the pattern is determined as YES in S606, NO in S608, NO in S611, YES in S615, and YES in S618. Since S_TIME exceeds 1, the start time is corrected to 1 in S609. In S611, it is determined that E_TIME exceeds 1 + TIME, and C_E_TIME is corrected to 1 + TIME in S616. With this correction, the correction in S618 is not applied.

  FIG. 10 shows an example in which the playback time of the music body is longer than the total playback time and exceeds the broadcast start time of the next music on the cue sheet. In FIG. 10, the pattern is determined as YES in S606, YES in S608, YES in S611, NO in S612, and NO in S618. Since E_TIME exceeds Z_TIME and exceeds the broadcast start time of the next song on the cue sheet, this is corrected in S613. Further, it is determined that C_TIME exceeds TIME, and the difference is corrected in S620.

  FIG. 11 is a flowchart showing a process for reproducing music data. A song is selected by a user operation, and a playback instruction is input (S1101). The control unit 2 moves the playback start position to C_S_TIME of the music for which playback is instructed, and causes the playback unit 5 to start playback (S1102). Subsequently, the control unit 2 determines whether or not the music data has been reproduced up to C_E_TIME during the reproduction of the music data (S1103). When playing to C_E_TIME (YES in S1103), the control unit 2 finishes playing the selected song, selects the next song in the song list, moves the playback start position to C_S_TIME of the selected song, Playback is started (S1102). With the above processing, only the specified song body is automatically identified and played back, so that users who want to listen to only the song body can operate without needing to fast-forward or skip extra parts other than the song body by user operation. Improves.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. You may provide with the form of the recording medium which recorded the computer program for making a computer perform said content specific apparatus, or the computer program.

  The present invention can be suitably employed in content recording / playback apparatuses such as HDD recorders and PCs.

1 Content Recording / Reproducing Device 2 Control Unit 3 HDD
4 Memory 5 Playback Unit 6 Reception Unit 7 Communication Unit 8 Operation Unit 9 Display Unit

Claims (8)

A content specifying device for specifying a content body of content selected from broadcast data including a plurality of content recorded in a storage medium,
Means for obtaining the total playback time TIME of the official content for the content;
Means for specifying the start time S_TIME and the end time E_TIME of the content body in the content by music recognition technology;
Based on the cue sheet, means for specifying a playback time Z_TIME that is the time from the broadcast start time to the broadcast end time of the content;
A content specifying device comprising: means for specifying a content body start time C_S_TIME and a content body end time C_E_TIME based on the total playback time TIME, the start time S_TIME, the end time E_TIME, and the playback time Z_TIME. Means for setting the start time S_TIME to the start time C_S_TIME when the start time S_TIME is smaller than a predetermined value;
The content specifying device according to claim 1, further comprising means for setting the predetermined value to the start time C_S_TIME when the start time S_TIME is equal to or greater than the predetermined value.   Means for setting the end time E_TIME to the end time C_E_TIME when the end time E_TIME is smaller than the total reproduction time TIME + the predetermined value and the end time E_TIME is smaller than the reproduction time Z_TIME; The content identification device according to claim 1 or 2.   When the end time E_TIME is smaller than the total playback time TIME + the predetermined value and the end time E_TIME is equal to or longer than the playback time Z_TIME, the playback time Z_TIME is further set to the end time C_E_TIME. The content identification device according to claim 1.   When the end time E_TIME is equal to or greater than the total playback time TIME + the predetermined value, if the playback time Z_TIME is greater than the total playback time TIME + the predetermined value, the total playback time TIME + the predetermined value is set to the end time C_E_TIME. The content according to any one of claims 1 to 4, further comprising means for setting the playback time Z_TIME to the end time C_E_TIME if the playback time Z_TIME is set and the playback time Z_TIME is equal to or less than the total playback time TIME + the predetermined value. Specific device.   Means for setting the broadcast start time specified by the cue sheet to the start time C_S_TIME and setting the broadcast end time to the end start time C_E_TIME when the playback time Z_TIME is less than or equal to the total playback time TIME The content identification device according to claim 1, comprising:   When C_TIME, which is the time from the start time C_S_TIME to the end start time C_E_TIME, is greater than the total playback time TIME, the start time C_S_TIME is delayed by (C_TIME−TIME) ÷ 2, and the end time C_E_TIME is set to (C_TIME− The content identification device according to claim 1, further comprising means for advancing by (TIME) ÷ 2.   A content identification program for causing a computer to execute each means of the content identification device according to claim 1.

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