JP2008197268A - Data reproduction device, data reproduction method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data reproduction device capable of easily reproducing video data to the flow of a musical piece, even when the tempo of the musical piece is varied like live performance, and a data reproduction method and a program. <P>SOLUTION: In a video display device having the data reproduction device, a data reading section 103 reads lyrics data which are synchronized with a reference musical piece data, on the basis of time information generated by comparison of a live musical piece data with the reference musical piece data prepared beforehand, which is performed by a time alignment section 102, whereby: the live musical piece data and the lyrics data can be time-synchronized and reproduced; and the data prepared beforehand are reproduced matching the flow of the musical piece, even when the tempo of the musical piece is varied like live performance. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for reproducing other data in synchronization with input data.

  In a general karaoke apparatus, for example, music data composed of MIDI (Musical Instruments Digital Interface) format accompaniment data, sequence data for displaying lyrics telop of music, and video data are synchronized. By playing, the user can enjoy karaoke of the music. Japanese Patent Application Laid-Open No. 2004-133620 discloses a technique for receiving accompaniment data and video data separately from a server and reproducing them in synchronization. Patent Document 2 discloses a technique for providing a karaoke performance with a sense of presence such as a live performance.

Moreover, the technique for displaying lyrics is not used only in a karaoke apparatus, but is also used in a song program in television broadcasting or the like. In television broadcasting, when a singer displays a lyrics telop along with a song in a live broadcast song program or the like, the operator displays the lyrics at a predetermined timing as the music progresses.
JP 2003-15675 A JP 2000-347676 A

  However, when the technique disclosed in Patent Document 1 is used, the accompaniment data is reproduction of data in MIDI format. Therefore, reproduction using a sound source that can reproduce data in MIDI format results in poor sound quality, In some cases, the tempo was monotonous. In addition, in the case of the technique disclosed in Patent Document 2, a sense of reality such as a live performance can be obtained, but since the progress of the music is not monotonous, the sequence data for displaying the lyrics telop, etc. It was necessary to prepare in advance according to the progress of. Moreover, the operator's work as described above in television broadcasting etc. is not allowed to be mistaken in the actual performance, and it is necessary to practice in advance the timing of the progress of the music and the timing of displaying the lyrics, which is very burdensome. It was big.

  The present invention has been made in view of the above-described circumstances, and is a data reproducing apparatus that can easily reproduce data in accordance with the flow of music even when there is a change in the tempo of the music as in live performances. An object of the present invention is to provide a data reproduction method and program.

  In order to solve the above-mentioned problem, the present invention stores first audio data and storage means for storing first data having synchronization information for defining the time for each part of the data, and is supplied from the outside. Time alignment means for associating the second audio data and the first audio data in units of a frame of a predetermined time length, and generating time information indicating the time for the corresponding portion, and the time information and the synchronization Data reading means for reading out the first data from the storage means based on the correspondence relationship of information, and video data for generating first video data based on the first data read out by the data reading means Generating means; and delay means for delaying the second audio data supplied from outside by a predetermined amount. To provide a reproducing apparatus.

  In addition, the present invention stores the first audio data and the storage means for storing the first data and the second data having the synchronization information that defines the time for each part of the data, and is supplied from the outside. Time alignment means for associating the second audio data and the first audio data in units of frames of a predetermined time length, and generating time information indicating the time for the corresponding part; and the time information and the synchronization information Based on the correspondence relationship, the data reading means for reading the first data and the second data from the storage means, and the first video based on the first data read by the data reading means Video data generating means for generating data, and delay means for delaying the second audio data supplied from outside by a predetermined amount. To provide a data reproducing apparatus according to claim.

  In another preferred embodiment, the second data may be control signal data that is sequence data for controlling an externally connected device.

  In another preferable aspect, the second data may be audio data.

  Moreover, in another preferable aspect, it further comprises a sound source unit that generates audio data based on the second data read by the data reading unit, and the second data is generated by the sound source unit. It may be sequence data indicating the sounding content of the musical sound related to the audio data.

  Moreover, in another preferable aspect, the first data stored in the storage unit may be sequence data instructing display contents of a video.

  In another preferred embodiment, the first data stored in the storage means may be data indicating the content of the video itself.

  Further, in another preferred aspect, there is provided video synthesizing means for superimposing a video related to other video data on a video related to one video data among the plurality of video data when a plurality of video data is inputted. The delay means delays the second video data supplied from the outside and time-synchronized with the second audio data by the predetermined amount, and the video synthesizing means is delayed by the delay means. The video related to the first video data generated by the video data generation means may be superimposed on the video related to the second video data.

  In another preferable aspect, the delay amount in the delay unit is set as a time from when the second audio data is supplied to the time alignment unit to when the first video data is generated by the video data generation unit. It may be.

  In the present invention, the second audio data supplied from the outside and the first audio data stored in the storage means are associated with each other in units of frames having a predetermined time length, and the time indicating the time for the corresponding portion is shown. The time information and the synchronization information are stored in a time alignment process for generating information and storage means for storing the first audio data and storing first data having synchronization information for defining the time for each part of the data. A data reading process for reading the first data based on the correspondence relationship, a video data generating process for generating the first video data based on the first data read in the data reading process, There is provided a data reproduction method comprising: a delay process for delaying a second audio data supplied from outside by a predetermined amount.

  In the present invention, the second audio data supplied from the outside and the first audio data stored in the storage means are associated with each other in units of frames having a predetermined time length, and the time indicating the time for the corresponding portion is shown. A time alignment process for generating information, and first audio data, and storage means for storing first data and second data having synchronization information for defining a time for each part of the data; A data reading process for reading the first data and the second data based on the correspondence between the information and the synchronization information, and a first data based on the first data read in the data reading process A video data generation process for generating video data; and a delay process for delaying the second audio data supplied from outside by a predetermined amount. Providing data reproducing method according to claim.

  According to another aspect of the present invention, there is provided a storage function for causing a computer having storage means to store the first audio data in the storage means and storing the first data having synchronization information for defining the time for each part of the data. A time alignment function for associating the second audio data supplied from the outside with the first audio data in units of a frame having a predetermined time length, and generating time information indicating the time for the corresponding portion; Based on the correspondence between the time information and the synchronization information, the data read function for reading the first data from the storage means, and the first video data based on the first data read by the data read function And a delay function for delaying the second audio data supplied from the outside by a predetermined amount, A computer readable program for implementing.

  According to another aspect of the present invention, a computer having storage means stores first audio data and first audio data in the storage means, and includes synchronization information that defines a time for each part of the data. The storage function for storing the data and the second data, the second audio data supplied from the outside, and the first audio data are associated with each other in a frame unit of a predetermined time length, and the time for the corresponding part is set. A time alignment function for generating time information to be shown, a data read function for reading out the first data and the second data from the storage means based on the correspondence between the time information and the synchronization information, and the data A video data generation function for generating first video data based on the first data read by the read function; A computer readable program for causing the second audio data et supplied realizing a delay function for a predetermined amount delay.

  According to the present invention, it is possible to provide a data reproducing apparatus, a data reproducing method, and a program capable of easily reproducing data in accordance with the flow of music even when the tempo of the music varies as in live performance. Can do.

  Hereinafter, an embodiment of the present invention will be described.

<Embodiment>
FIG. 1 is a block diagram showing a hardware configuration of a video display apparatus 1 having a data reproducing apparatus according to the embodiment of the present invention.

  A CPU (Central Processing Unit) 11 reads out a program stored in a ROM (Read Only Memory) 12, loads it into a RAM (Random Access Memory) 13, and executes it. Control is performed via the bus 10. The RAM 13 functions as a work area when the CPU 11 processes each data stored.

  Further, the RAM 13 temporarily stores live video data (second video data) and live musical sound data (second audio data) for streaming playback received from the communication unit 17 in a live data buffer area 13a. In addition to having a buffering function, the communication unit 17 also receives and stores information data (hereinafter referred to as music information data) related to music corresponding to the data. In addition, the information regarding a music may be anything as long as it is information that can specify the music, such as a music name and a recognition number. Then, the CPU 11 reads live video data and live music data buffered in the RAM 13, and performs streaming playback by performing processing as described later.

  Here, the live video data is video data of a video (hereinafter referred to as a live video) obtained by shooting a live performance of music. In addition, live music data is audio data of a sound recording a live performance of a music (hereinafter referred to as a live performance), and the live performance includes a singer's singing voice (hereinafter referred to as a live vocal) and accompaniment. Yes.

  The storage unit (storage means) 14 is a large-capacity storage means such as a hard disk, for example, and stores reference song data serving as reference data for each song in the song data storage area 14a. The reference music data includes reference musical sound data (first audio data) and lyrics data (first data). The reference musical sound data is audio data obtained by recording a performance (hereinafter referred to as a reference performance) including a singing voice and accompaniment as a sample of the music, and a time code indicating the reproduction time is attached. The lyric data is sequence data having text data indicating the lyrics of the music and data indicating the display timing of each text of the text data, and a time code (synchronization information) indicating the readout time of the sequence data is attached. Yes. The reference musical sound data and the lyric data can be reproduced in time synchronization by being read out by the same time code, and the lyrics suitable for the singing voice as a sample of the music are displayed.

  The display unit 15 is a display device such as a liquid crystal display that displays an image on a screen, and performs display based on input image data. Further, various screens such as a menu screen for operating the video display device 1 are displayed. The operation unit 16 is, for example, a keyboard or a mouse. When a user of the video display device 1 operates the operation unit 16, data representing the operation content is output to the CPU 11.

  The communication unit 17 is a communication means such as a tuner that receives data by wire or wireless. In the present embodiment, as described above, the communication unit 17 receives live video data, live music data, and music information data. And has a function of buffering in the live data buffer area 13 a of the RAM 13.

  The sound output unit 18 has sound emitting means such as a speaker, and emits sound based on the input audio data.

  Next, functions realized by the CPU 11 executing programs stored in the ROM 12 will be described. FIG. 2 is a block diagram showing a software configuration showing the functions realized by the CPU 11.

  The music data selection unit 101 reads music information data from the live data buffer area 13a, and recognizes the music of each data received by the communication unit 17. Then, reference music data corresponding to the recognized music is selected from the reference music data stored in the music data storage area 14a, and reference musical sound data and lyrics data of the reference music data are read out. Then, the music data selection unit 101 outputs the read reference musical tone data to the time alignment unit (time alignment unit) 102, and the read lyrics data is read to the data reading unit (data reading unit) 103 described later. Until it is buffered in the RAM 13.

  The time alignment unit 102 acquires live musical tone data read from the live data buffer area 13a by the CPU 11, compares the live musical tone data with the reference musical tone data output from the music data selection unit 101, and performs live processing. It has a function of detecting the progress of the music between the performance and the reference performance and outputting a time code (time information) based on the progress of the music.

  Here, the deviation of the progression of music is obtained by separating each data into frame units of a predetermined time length, performing FFT (Fast Fourier Transform) on each of them, calculating the spectrum of each data, Detection is performed by associating similar spectra between frames. In addition, in this embodiment, DP (Dynamic Programming) matching is used for the function of detecting the progression of music progression. Specifically, the processing is as follows.

  The time alignment unit 102 forms a coordinate plane (hereinafter referred to as a DP plane) as shown in FIG. The vertical axis of the DP plane indicates the inverse Fourier transform of the logarithm of the absolute value of the spectrum of each frame for the spectrum obtained by dividing the live musical sound data into frames each having a predetermined time length and applying FFT to each. The parameters (cepstrum) obtained by the conversion are arranged along the time axis as a1, a2, a3... An. Further, b1, b2, b3... Bn on the horizontal axis are reference music data arranged in accordance with the time axis as described above. Here, the intervals of a1, a2, a3... An on the vertical axis and the intervals of b1, b2, b3... Bn on the horizontal axis all correspond to the time length of the frame. Each lattice point in the DP plane has a DP matching score which is a value indicating the Euclidean distance of each parameter of a1, a2, a3... An and each parameter of b1, b2, b3. Are associated. For example, the lattice points (a1, b1) positioned by a1 and b1 are the parameters obtained from the first frame of the series of frames of live musical sound data and the first frame of the series of frames of reference musical sound data. A value indicating the Euclidean distance of the obtained parameter is associated.

  After the time alignment unit 102 forms the DP plane having such a structure, the lattice corresponding to the end positioned by an and bn from the lattice point (a1, b1) positioned by the start end positioned by a1 and b1. All routes to the point (an, bn) are searched, and for each searched route, the DP matching score of each lattice point traced from the start end to the end is accumulated to obtain an accumulated value. Note that the start and end are not the first and last frames of each data, but are performed in units of a predetermined number of frames from each data, and are performed from the first frame to the last frame in this unit. The data is sequentially processed until the last frame of each data is processed.

  Then, a path having the minimum DP matching score accumulated value is specified on the DP plane, and each frame of the reference musical sound data is associated with each frame of the live musical sound data by each grid point on the path. A shift in the progression of music can be detected by this correspondence. For example, in the path marked on the DP plane shown in FIG. 3, from the lattice point (a1, b1) positioned by a1 and b1, to the lattice point (a2, b2) positioned by a2 and b2 at the upper right You can see that it is going. In this case, the positions on the time axis of the frame a2 and the frame b2 are the same from the beginning. On the other hand, in this route, the grid point (a2, b2) positioned by a2 and b2 advances to the grid point (a2, b3) positioned by a2 and b3 on the right. If there is no shift in the progression of the music, the process proceeds to the grid point (a3, b3), and the frame that should correspond to the position of the frame b3 on the time axis is the frame a3, but the grid point (a2, b3) Therefore, the frame of b3 is associated with the same position on the time axis of the frame of a2, not a3, and the progress of the music is generated. That is, since the content of the performance that has progressed up to the frame b3 of the reference musical sound data has progressed to the frame a2 of the live musical sound data, the live performance progresses faster than the reference performance at this point. It will be out. In this way, it is possible to detect a shift in the progression of music. Then, the frame of the reference musical sound data is associated with all the frames of the live musical sound data to detect a shift in the progression of the music. The above is the mechanism of DP matching.

  Next, a function of sequentially outputting time codes based on the progress of music detected by the time alignment unit 102 will be described. As described above, the time alignment unit 102 associates the frame of the reference musical sound data with each frame of the live musical sound data, so that the position on the time axis of the input live musical sound data is set on the time axis of the reference musical sound data. It can be recognized as a position (hereinafter referred to as a reproduction position). In addition, the tempo can be recognized from the time change of the reproduction position. The time alignment unit 102 generates a time code based on the recognized reproduction position and tempo at predetermined intervals and sequentially outputs them. If the reference musical sound data is read and reproduced by referring to the time code sequentially output from the time alignment unit 102, the time axis of the reference performance is expanded and reproduced with the progression of music equivalent to the live performance. Can do.

  Returning to FIG. 2, the description will be continued. The data reading unit 103 reads the lyrics data buffered in the RAM 13 by the music data selection unit 101 so that the time codes sequentially output from the time alignment unit 102 correspond to the time codes attached to the lyrics data, The data is sequentially output to the data processing unit 104. The data processing unit (video data generation unit) 104 generates lyric video data (first video data) based on the lyrics data sequentially output from the data reading unit 103, and the video synthesis unit (video synthesis unit). It outputs to 106. Here, the text data indicating the lyrics of the music and the lyrics data having data indicating the display timing of the text are output from the data reading unit 103 by reading with reference to the time code output from the time alignment unit 102. Since it is sequence data, the lyric video data is generated as video data that is displayed in accordance with the progress of the tune of the live performance as the lyrics display timing of the tune.

  The delay unit (delay unit) 105 performs delay processing for a predetermined time on the live video data and live music data read from the live data buffer area 13a by the CPU 11, and outputs the result. Here, the predetermined time is set to a time required for processing from when the time alignment unit 102 described above acquires live musical tone data until the data processing unit 104 outputs lyrics video data. In this way, the live musical sound data and live video data output from the delay unit 105 and the lyrics video data output from the data processing unit 104 are synchronized in time.

  The video composition unit 106 superimposes a lyric video (hereinafter referred to as a lyric video) related to the lyric video data output from the data processing unit 104 with respect to the live video related to the live video data output from the delay unit 105. The paused synthesized video data is generated and output to the display unit 15. Here, the synthesized video data is a time-synchronized lyric video, that is, the lyrics of the music in accordance with the progress of the music of the live performance, with respect to the live video related to the live video data subjected to the delay process for a predetermined time in the delay unit 105. Superimpose the displayed video, and by synthesizing the lyric image of the song with the live video, the lyric video is generated as video data for the live vocal, live performance, and live video. The

  In this way, the composite video data is output to the display unit 15 and the live musical sound data is output to the audio output unit 18, so that the video display device 1 having the data reproduction device according to the present embodiment is originally It is possible to reproduce a video and a music in which the live video is synchronized with time, that is, a lyric video combined with the progress of the music.

  As mentioned above, although embodiment of this invention was described, this invention can be implemented in various aspects as follows.

<Modification 1>
In the embodiment, live video data is included in the input information, but the input data may not include video data. In this case, as illustrated in FIG. 4, the data processing unit 104 may output the lyrics video data to the display unit 15 as it is without using the video synthesis unit 106. In this way, the input information does not need to include video data, but only needs to include audio data. For example, data from various devices such as audio data output from portable audio and radio broadcasts. Can handle input. In this case, the communication unit 17 may be a communication unit corresponding to each data input.

<Modification 2>
In the embodiment, the lyric data corresponding to the reference musical sound data is sequence data including text data indicating the lyrics of the music and data indicating the display timing of each text of the text data. It may be video data (first data) with a time code that can be reproduced in time synchronization with the musical sound data. In this case, the following may be performed. As shown in the embodiment, the data reading unit 103 refers to the time code, reads the lyric data that is video data, and sequentially outputs it to the data processing unit 104. Thus, the lyrics data sequentially output from the data reading unit 103 is output to the data processing unit 104 with the time axis expanded and contracted so as to match the progress of the music when read. Then, the data processing unit 104 generates and outputs lyrics data with the time axis expanded and contracted as lyrics video data (first video data). In this way, even if the lyrics data is video data, the effects of the present invention can be achieved. Note that the video data is not limited to lyrics data, and any video data that is to be displayed in accordance with the progress of the music in the input audio data (in the embodiment, live music data), such as music scores, etc. Video data may be used.

<Modification 3>
In the embodiment, the lyrics are displayed in accordance with the progress of the music, but in addition to this, other external devices may be controlled in accordance with the progress of the music. In this case, the following configuration may be used. As shown in FIG. 5, for example, a control signal output unit 19 such as an AUX (Auxiliary) terminal is provided, and the reference music data stored in the music data storage area 14 a is a control signal in addition to reference musical sound data and lyrics data. It has data (second data). Here, the control signal data is sequence data having a signal for controlling an external device connected to the AUX terminal and data indicating the timing of the control, and is synchronized with the reference musical sound data in the same manner as the lyrics data. A time code (synchronization information) is attached so that an external device can be controlled.

  Then, as shown in FIG. 6, in addition to the operation of the music data selection unit 101 in the embodiment, the control signal data stored in the music data storage area 14a is read. The control signal data is buffered in the RAM 13 until it is read by the data reading unit 103. Similar to the case of reading the lyric data, the data reading unit 103 associates the time code sequentially output from the time alignment unit 102 with the time code attached to the control signal data so as to correspond to the music data selection unit 101. Reads out the control signal data buffered in the RAM 13 and sequentially outputs it to the control signal output unit 19. In this way, the video display device 1 having the data reproduction device controls the external device connected to the control signal output unit based on the control signal output in accordance with the progress of the music. An external device can be operated as it progresses. Note that the external device can be applied to any device that can be controlled by a control signal, such as a lighting device, an acoustic device, and a robot. In this case, the control signal data may be data that matches the device to be controlled. Furthermore, when it is desired to simultaneously control a plurality of external devices, a plurality of control signal data may be prepared so that a plurality of devices can be connected to the control signal output unit 19. This connection may be a wired connection or a wireless connection, as long as a signal can be transmitted.

<Modification 4>
In the embodiment, the lyrics are displayed in accordance with the progress of the music. However, in addition to this, another musical sound may be reproduced in accordance with the progress of the music in the live performance. In this case, the following configuration may be used. As shown in FIG. 7, the reference music data stored in the music data storage area 14a includes MIDI data (second data) in addition to the reference musical sound data and the lyrics data. Here, time information (synchronization information) is attached to the MIDI data so that it can be reproduced in time synchronization with the reference musical sound data, like the lyrics data.

  Then, as shown in FIG. 8, the music data selection unit 101 reads out MIDI data stored in the music data storage area 14a in addition to the operation in the embodiment. The MIDI data is buffered in the RAM 13 until it is read by the data reading unit 103. Similar to the case of reading the lyrics data, the data reading unit 103 associates the time code sequentially output from the time alignment unit 102 with the time information attached to the MIDI data so as to correspond to the music data selecting unit 101. Reads out the MIDI data buffered in the RAM 13 and sequentially outputs it to the reproduction unit (sound source unit) 107. Here, when the time information is a time code, it may be handled as it is. However, when the time information is information representing a relative time other than the time code such as a duration, the CPU 11 reproduces the time information in synchronization with the reference musical sound data. A time code may be generated by referring to a tempo that is set so that it can be performed. As a result, the MIDI data sequentially output from the data reading unit 103 is read and output to the reproducing unit 107 in accordance with the progress of the music when being read. Then, the reproduction unit 107 reproduces this MIDI data to generate MIDI musical sound data that is audio data, and outputs it to the voice synthesis unit 108. On the other hand, live musical sound data delayed by the delay unit 105 is also output to the voice synthesis unit 108. Then, the voice synthesizer 108 generates a sound obtained by mixing the live performance related to the live music data and the MIDI performance related to the MIDI music data as synthesized music data, and outputs it to the voice output unit 18. Note that the live musical sound data and the MIDI musical sound data may be separately output to the audio output unit 18 without being mixed. In this case, each data may be mixed in the audio output unit 18 or may be emitted from different sound emitting means without being mixed. Here, the reproducing unit 107 can generate MIDI musical tone data by having a sound source unit capable of reproducing MIDI data. Note that the sequence data does not necessarily need to be MIDI data as long as it is sequence data indicating the tone generation content of the audio data generated by the sound source unit.

  Further, instead of the MIDI data of the reference music data stored in the music data storage area 14a, the additional music sound which is audio data with time code (synchronization information) so that it can be reproduced in time synchronization with the reference music data. Data (second data) may be used. In this case, processing is performed as follows. First, the music data selection unit 101 reads the additional musical tone data stored in the music data storage area 14a. The additional musical tone data is buffered in the RAM 13 until it is read out by the data reading unit 103. Similar to the case of reading the lyric data, the data reading unit 103 associates the time code sequentially output from the time alignment unit 102 with the time code attached to the additional musical tone data, so that the music data selection unit 101 Reads out the additional musical tone data buffered in the RAM 13 and sequentially outputs it to the playback unit 107. Thus, the additional musical sound data sequentially output from the data reading unit 103 is output to the reproducing unit 107 with the time axis expanded and contracted so as to match the progress of the music when read. Then, the playback unit 107 outputs the additional musical sound data whose time axis is expanded and contracted as new audio data to the voice synthesis unit 108. Thereafter, processing may be performed in the same manner as in the case of MIDI data. In this way, not only video but also various sounds can be output as the music progresses.

<Modification 5>
In the embodiment, the communication unit 17 is a communication unit such as a tuner that receives data by wire or wireless, and has received live video data, live music data, and music information data. As indicated by a broken line, a data input unit 20 may be provided and these data may be input from the data input unit 20. For example, if these data are data recorded on a recording medium such as a DVD (Digital Versatile Disc), the data input unit may be an optical drive that can read the data recorded on the DVD. Even if it does in this way, the effect similar to embodiment can be acquired.

<Modification 6>
In the embodiment, a delay unit 105 is provided, and after the time alignment unit 102 obtains live music data as live video data and live music data read from the live data buffer area 13 a by the CPU 11, the data processing unit 104. Was output after being subjected to a delay process for the time required to process the lyrics video data (hereinafter referred to as the delay time). On the other hand, as shown in FIG. 9, the time code output from the time alignment unit 102 may be output to the data reading unit 103 via the time code prediction unit 109. In this case, the time code prediction unit 109 refers to the time codes sequentially output from the time alignment unit 102 and predicts the time code output from the time alignment unit 102 after the delay time. Then, the time code prediction unit 109 may sequentially output the predicted time code to the data reading unit 103. Here, the prediction of the time code is performed by referring to a predetermined number of past time codes among the time codes sequentially output from the time alignment unit 102, and from the amount of change in the position on the time axis indicated by these time codes. The time code after the delay time may be estimated. Note that the time code can be predicted based on a predetermined algorithm, not limited to the above method, because the time code output from the time alignment unit 102 after the delay time may be predicted. In this way, the effects of the embodiment can be obtained without delaying the live musical sound data and live performance data using the delay unit 105.

<Modification 7>
In the embodiment, the time alignment unit 102 uses DP matching for the function of detecting a shift in the progress of music. However, the time alignment unit 102 may detect a shift in the progress of music by a different method. For example, an HMM (Hidden Markov Model: Hidden Markov Model) may be used, or waveform feature values (pitch, volume, etc.) may be extracted and compared from each data to be compared. That is, any method may be used as long as it is a method that can compare each data and correspond a similar portion between the data. Even if it does in this way, the effect similar to embodiment can be acquired.

It is a block diagram which shows the structure of the hardware of the video display apparatus which concerns on embodiment. It is a block diagram which shows the structure of the software of the video display apparatus which concerns on embodiment. It is explanatory drawing which shows DP plane at the time of performing DP matching. 12 is a block diagram illustrating a software configuration of a video display device according to Modification 1. FIG. It is a block diagram which shows the structure of the hardware of the video display apparatus concerning the modification 3. FIG. 12 is a block diagram illustrating a software configuration of a video display device according to Modification 3. It is a block diagram which shows the structure of the hardware of the video display apparatus concerning the modification 4. It is a block diagram which shows the structure of the software of the video display apparatus which concerns on the modification 4. It is a block diagram which shows the structure of the software of the video display apparatus which concerns on the modification 6. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Video display apparatus, 10 ... Bus, 11 ... CPU, 12 ... ROM, 13 ... RAM, 13a ... Live data buffer area, 14 ... Storage part, 14a ... Music data storage area, 15 ... Display part, 16 ... Operation part , 17 ... Communication unit, 18 ... Audio output unit, 19 ... Control signal output unit, 20 ... Data input unit, 101 ... Music data selection unit, 102 ... Time alignment unit, 103 ... Data reading unit, 104 ... Data processing unit, 105 ... Delay unit, 106 ... Video synthesis unit, 107 ... Playback unit, 108 ... Audio synthesis unit, 109 ... Time code prediction unit

Claims (13)

Storage means for storing the first audio data and storing the first data having synchronization information for defining the time for each part of the data;
Time alignment means for associating the second audio data supplied from the outside with the first audio data in units of frames of a predetermined time length, and generating time information indicating the time for the corresponding portion;
Data reading means for reading the first data from the storage means based on the correspondence between the time information and the synchronization information;
Video data generating means for generating first video data based on the first data read by the data reading means;
A data reproducing apparatus comprising: delay means for delaying the second audio data supplied from outside by a predetermined amount. Storage means for storing the first audio data and the first data and the second data having synchronization information for defining the time for each part of the data;
Time alignment means for associating the second audio data supplied from the outside with the first audio data in units of frames of a predetermined time length, and generating time information indicating the time for the corresponding portion;
Data reading means for reading out the first data and the second data from the storage means based on the correspondence between the time information and the synchronization information;
Video data generating means for generating first video data based on the first data read by the data reading means;
A data reproducing apparatus comprising: delay means for delaying the second audio data supplied from outside by a predetermined amount.   3. The data reproducing apparatus according to claim 2, wherein the second data is control signal data that is sequence data for controlling a device connected to the outside.   3. The data reproducing apparatus according to claim 2, wherein the second data is audio data. A sound source unit for generating audio data based on the second data read by the data reading unit;
3. The data reproducing apparatus according to claim 2, wherein the second data is sequence data indicating the pronunciation content of a musical sound related to audio data generated by the sound source unit. The data reproducing apparatus according to claim 1, wherein the first data stored in the storage unit is sequence data that indicates a display content of a video. 6. The data reproducing apparatus according to claim 1, wherein the first data stored in the storage means is data indicating the content of the video itself. A plurality of video data is input, and further comprising video composition means for superimposing a video related to other video data on a video related to one video data among the plurality of video data,
The delay means delays the predetermined amount of the second video data supplied from the outside and time-synchronized with the second audio data,
The video composition means superimposes the video related to the first video data generated by the video data generation means on the video related to the second video data delayed by the delay means. A data reproducing apparatus according to any one of claims 1 to 7. The delay amount in the delay unit is set as a time from when the second audio data is supplied to the time alignment unit to when the first video data is generated by the video data generation unit. The data reproducing apparatus according to claim 1. Time alignment for generating time information indicating the time for the corresponding portion by associating the second audio data supplied from the outside with the first audio data stored in the storage unit in units of frames of a predetermined time length Process,
Based on the correspondence between the time information and the synchronization information, the first audio data is stored and the first data having the synchronization information for defining the time for each part of the data is stored. A data reading process for reading one data;
A video data generating process for generating first video data based on the first data read in the data reading process;
A data reproduction method comprising: a delay process of delaying the second audio data supplied from outside by a predetermined amount. Time alignment for generating time information indicating the time for the corresponding portion by associating the second audio data supplied from the outside with the first audio data stored in the storage unit in units of frames of a predetermined time length Process,
The first audio data is stored, and from the storage means for storing the first data and the second data having the synchronization information for defining the time for each part of the data, the correspondence between the time information and the synchronization information A data reading process for reading out the first data and the second data,
A video data generating process for generating first video data based on the first data read in the data reading process;
A delay process of delaying the second audio data supplied from the outside by a predetermined amount;
A data reproduction method comprising: a first output process for outputting the first video data generated in the video data generation process and the second audio data delayed in the delay process. In a computer having storage means,
A storage function for storing the first audio data in the storage means and storing the first data having synchronization information for defining the time for each part of the data;
A time alignment function for associating the second audio data supplied from the outside with the first audio data in units of frames of a predetermined time length, and generating time information indicating the time for the corresponding part;
A data read function for reading the first data from the storage means based on the correspondence between the time information and the synchronization information;
A video data generation function for generating first video data based on the first data read by the data read function;
A computer-readable program for realizing a delay function for delaying the second audio data supplied from the outside by a predetermined amount. In a computer having storage means,
A storage function for storing the first audio data and the first audio data in the storage means, and storing the first data and the second data having synchronization information for defining the time for each part of the data;
A time alignment function for associating the second audio data supplied from the outside with the first audio data in units of frames of a predetermined time length, and generating time information indicating the time for the corresponding part;
A data read function for reading out the first data and the second data from the storage means based on the correspondence between the time information and the synchronization information;
A video data generation function for generating first video data based on the first data read by the data read function;
A computer-readable program for realizing a delay function for delaying the second audio data supplied from the outside by a predetermined amount.

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