JP4148690B2 - Data transmission method, data reproduction method, and data reproduction apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data transmission method, a data reproduction method, and a data reproduction device, and is particularly suitable for use in a data transmission / reception system such as a content distribution system.
[0002]
[Prior art]
With the development and popularization of the Internet and mobile phone networks, various distribution servers for distributing contents such as music and video have been constructed. For example, a user can access a predetermined distribution server from his / her mobile terminal device and download desired music content data to his / her mobile terminal device. As a result, it becomes possible to reproduce and listen to a favorite music piece on its own mobile terminal device.
[0003]
The distribution data distributed from the server usually includes main data such as music contents, additional data such as lyrics linked to the data (including link data), and types and capacities of the main data and additional data. Consists of control data to be defined. The mobile terminal device determines the attributes of the main data and the additional data, the reproduction timing of the additional data, and the like by referring to the control data and the link data among the distribution data. As a result, reproduction of main data and link reproduction of additional data are executed.
[0004]
Data distribution from the server is performed by receiving a distribution request from the mobile terminal device. Here, the data format at the time of data distribution can be arbitrarily set on the distribution server side. In general, a fee is charged for such distribution. Therefore, data distribution is usually performed in order from important data. That is, it is usually distributed in order from the main data such as music content.
[0005]
The data distributed in this way is sequentially downloaded to the memory on the mobile terminal device side. Then, after the download of all the data is completed, when a reproduction request is input from the user, the link data is first read from the memory and stored in the work RAM or the like. Thereafter, the main data is read and reproduced, and in parallel with this, the additional data is reproduced according to the link data. Thereby, synchronous reproduction of main data and additional data is realized.
[0006]
[Problems to be solved by the invention]
In the above case, the input of the playback request from the user is made after the completion of the data download. However, depending on the user, there is a case where the user wants to immediately play the data without waiting for the completion of the download. obtain.
[0007]
However, when the data is distributed in order from the main data as described above, only the reproduction of the main data is possible even during downloading, but the reproduction of the additional data is performed on the main data. Since it is performed by linking, additional data and the link data cannot be transmitted unless they are transmitted. However, since the capacity of the main data is much larger than the capacity of the additional data, it takes a considerable time until the additional data is received. Therefore , if it is desired to link and reproduce additional data as well as the main data, it is practically impossible to reproduce during downloading, and the same timing as when all data has been downloaded, as described above. You can only play from.
[0008]
Therefore, the present invention provides a data transmission method, a data reproduction method, and a data reproduction device that can solve such problems and can quickly reproduce main data and additional data even during data download.
[0009]
[Means for Solving the Problems]
In view of the above problems, the present invention has the following features.
[0015]
The invention of claim 1 includes main data, additional data linked to the main data, a link table for managing the link between the main data and the additional data, the main data, the additional data, and the link table. A data reproduction method for receiving and reproducing file data including control data defining a transmission order, wherein the transmission order of control data, link table, additional data, and main data is referred to the received control data A transmission order determining step for determining the main data, and a reception timing determining step for determining whether reception of the main data is started when the determined transmission order is control data, link table, additional data, and main data. , While referring to the reproduction of the main data and the link table in response to the start of reception of the main data, Performing playback synchronized, and a playback start step for starting a link reproduction of the additional data, the processing of each step, and executes in parallel with downloading the file data to the storage unit.
[0016]
According to a second aspect of the present invention, there is provided main data, additional data linked to the main data, a link table for managing a link between the main data and the additional data, the main data, the additional data, and the link table. A data reproducing apparatus for receiving and reproducing file data including control data defining a transmission order, wherein storage data for sequentially storing the received file data, and the control data with reference to the received control data A transmission order discriminating means for discriminating the transmission order of the link table, the additional data, and the main data; and when the determined transmission order is the order of the control data, the link table, the additional data, and the main data, the main data is received. and reception timing determining means for determining whether started, the link table with the main data in accordance with the start of reception of the main data With reference, to reproduce in synchronism with the main data, and having a reproduction processing means for initiating a link playback processing of the additional data.
[0017]
The features of the present invention will become more apparent from the following description of embodiments.
[0021]
However, the following embodiment is merely one embodiment of the present invention, and the meaning of the term of the present invention or each constituent element is not limited to that described in the following embodiment. Absent.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0023]
First, FIG. 1 shows a configuration of a data distribution apparatus according to the embodiment. The data distribution apparatus distributes music content and lyrics text data linked to the music content to a data reproduction terminal.
[0024]
The data distribution apparatus 100 includes a transmission / reception unit 101, a link creation unit 102, a scramble unit 103, an input / output unit 104, a controller 105, a music content database 106, and a file storage unit 107.
[0025]
The transmission / reception unit 101 receives a signal from the data reproduction terminal via the antenna, or transmits file data to the data reproduction terminal. The link creation unit 102 generates a link table that defines the playback start timing of the text block with respect to the playback time axis of the music content. A method for creating such a link table will be described in detail later.
[0026]
The scramble unit 103 encrypts the content data according to the key information. The input / output unit 104 includes a key operation unit 104a such as a keyboard and a mouse, a display 104b such as a liquid crystal monitor, and a speaker. The controller 105 has a built-in program memory and controls each unit according to a control program stored in the program memory.
[0027]
The music content database 106 stores music content divided into files. The file storage unit 107 stores file data generated by linking text data to music content. Such file data includes music content and text data, a link table of the text data generated by the link creation unit 102, and control data described later generated by the controller 105.
[0028]
Next, the operation of the data distribution apparatus 100 will be described. First, the operation when linking lyrics text data to music content and generating a link table will be described.
[0029]
When linking lyric text to predetermined music content, the user first inputs the lyric text from the key operation unit 104a. Such text is sequentially displayed on the display 104b in a state of being divided into blocks (for example, for each lyric phrase).
[0030]
When the input of the lyric text is completed, the user inputs a music content reproduction command corresponding to the lyric text from the key operation unit 104a. In response to the reproduction command, the music content is read from the music content database 106 and reproduced / output by the input / output unit 104.
[0031]
When music reproduction is started, the user operates the key operation unit 104a while listening to the reproduced music to link the text block to the music content. That is, the text block is designated at the timing when the text block is to be reproduced and output. As a result, the text block is linked to the playback time on the music playback time axis. Such linking is performed by the link creation unit 102. The link creation unit 102 sequentially stores the link time, that is, the playback time on the playback time axis of each text block on the table. Thereby, a link table is generated.
[0032]
With reference to FIG. 2, the linking of the text blocks will be described. In the figure, t1, t2,..., Tn are elapsed times from the start of music content reproduction. Block 1, block 2,..., Block n are the above text blocks. If the block 1 is designated as described above at time t1 after the music content is reproduced and output, the reproduction output time of the block 1 on the reproduction time axis is set to t1. Similarly, when block 2, block 3,..., Block n are sequentially specified, the reproduction output time of each block is set to t2, t3,. Each block and its start time are associated on the link table. Thus, a link table is generated.
[0033]
In this way, when the linking with respect to all the music contents is completed, control data is then generated. Generation of such control data is performed by the controller 105 in response to information input from the user. The contents of the control data will be described later.
[0034]
As described above, when the control data and the link table are generated, the control data, the music content, the text data, and the link table created by the link creating unit 102 are stored in one file. Accumulated in the storage unit 107. At this time, the music content is encrypted by the scramble unit 103. The encryption key used for encryption is included in the control data.
[0035]
FIG. 3 shows the configuration of the file data. The control data defines the contents of data included in the file, the distribution order, and the like. Among these, the “packet type” is the type of data included in the file. In the case of the figure, the file includes four packets of control data, link table, text data, and music content. The “packet order” indicates in what order the packets are arranged from the top of the file. The “packet capacity” is the data capacity of each packet.
[0036]
The controller 105 generates the control data of FIG. 3 according to the contents of each packet. Further, the “packet order” is defined so that the packets are arranged in the order shown in FIG. Thus, after the control data is generated, the packets are arranged in the order shown in the figure and stored in the file storage unit 107 as described above.
[0037]
Thereafter, when there is a file data distribution request from the data reproduction terminal, the controller 105 reads the file data from the file storage unit 107 and transmits each data to the data reproduction terminal in order from the top of the file. Thereby, data arrives at the data reproduction terminal in the order of control data, link table, text data, and music content.
[0038]
FIG. 4 shows the configuration of the data reproduction terminal according to the embodiment.
[0039]
The data reproduction terminal 200 includes a transmission / reception unit 201, a key operation unit 202, a decryption key storage unit 203, a decryption unit 204, a D / A conversion unit (hereinafter also referred to as a DA conversion unit) 205, a controller 206, A memory 207, a memory card interface 208, a memory card 209, a display driver 210, and a display 211 are included.
[0040]
The transmission / reception unit 201 transmits a distribution request to the data distribution apparatus via the antenna or receives a signal from the data distribution apparatus. The key operation unit 202 includes a touch key and a touch panel, and supplies an operation command from the user to the controller 206. The decryption key storage unit 203 stores the encryption key attached to the file data to be reproduced. The decryption unit 204 decrypts the music content using the encryption key stored in the decryption key storage unit 203. The DA conversion unit 205 converts the decrypted music content into an analog audio signal and outputs it to a speaker.
[0041]
The controller 206 has a built-in program memory and controls each unit according to a control program stored in the program memory. The memory 207 functions as a work area of the controller 206, and temporarily stores data such as control data and a link table in accordance with an instruction from the controller 206. The memory card interface 208 controls data exchange between the memory card 209 and the data bus. The memory card 209 stores the data distributed from the data distribution device by classifying the data for each file. The display driver 210 drives the display 211 in response to a command from the controller 206. The display 211 displays text or the like according to the control of the display driver 210.
[0042]
Next, the operation of the data reproduction terminal 200 will be described.
[0043]
First, the operation when receiving file data distribution from the distribution server will be described. When receiving file data distribution, the user inputs a file data distribution request via the key operation unit 202. The distribution request is stored in a predetermined transmission packet and transmitted from the transmission / reception unit 201 to the data distribution apparatus. The data distribution apparatus that receives the distribution request reads the file data from the file storage unit, stores it in a predetermined transmission packet, and transmits it to the data reproduction terminal. The transmission / reception unit 201 that has received the transmission packet transfers it to the controller 206. The controller 206 extracts file data from the transmission packet and sequentially transfers it to the memory card interface 208. Accordingly, the file data is sequentially downloaded to the memory card 209.
[0044]
Next, the reproduction operation of file data downloaded to the memory card 209 will be described. When reproducing predetermined file data, the user inputs a reproduction command for the file data via the key operation unit 202. In response to the reproduction command, the controller 206 reads the control data and link table of the file data from the memory card 208 and stores them in the memory 207. At the same time, the encryption key in the control data is stored in the decryption key storage unit 203.
[0045]
Thereafter, the music content of the file data is read from the memory card 209 and sequentially transferred to the decoding unit 204. The decryption unit 204 decrypts the transferred music content using the encryption key in the decryption key storage unit 203 and sends it to the DA conversion unit 205. The DA converter 205 converts this into an analog audio signal and supplies it to the speaker. Thereby, the music according to a music content is output from a speaker.
[0046]
In parallel with the reproduction of the music content, the controller 206 reads the text data from the memory card 206 and sequentially stores it in the memory 207. Then, the text data is reproduced at a timing specified in the link table to generate image data. The generated image data is sequentially transferred to the display driver 210.
[0047]
The display driver 210 that has received the image data holds the image data and drives the display 211 according to the image data. As a result, text (such as lyrics) synchronized with music playback is displayed on the display.
[0048]
Next, an operation when reproducing the file data while downloading the file data will be described with reference to the flowchart of FIG.
[0049]
When file data is received by the download operation (step S101), the file data is sequentially downloaded to the memory card 209 according to the download operation (step S108). Further, the control data in the downloaded file data is read from the memory card, stored in the memory 207, and referred to by the controller 206 (step S102). Then, based on the control data, it is determined whether or not the file data can be reproduced simultaneously (reproduction in parallel with download) (step S103). Such a determination is made with reference to the “packet order” shown in FIG. That is, if the “packet order” is the order shown in FIG. 3 (link table → text data → music content) or text data → link table → music content, it is determined that simultaneous playback is possible. The
[0050]
The file data from the data distribution apparatus 101 shown in FIG. 1 has a “packet order” of link table → text data → music content, so when receiving file data from the data distribution apparatus 101 In step S103, it is determined that simultaneous playback is possible.
[0051]
If it is determined that simultaneous playback is possible, the link table is read from the memory card 209 and stored in the memory 207 (step S104). In parallel with this, the controller 206 monitors the capacity of the received file data from the beginning, and this capacity is the total capacity of the control data, link table, and text data specified by “packet capacity” in the control data. It is determined whether or not it has been reached. Then, it is determined that the download of the music content is started at the timing when the capacity is reached (step S105).
[0052]
When the download of the music content is started, the music content and the text data are sequentially read out from the memory card 209, and the music content is reproduced and the text data is linked and reproduced in the same manner as the normal reproduction operation. Is performed (step S106). Such reproduction is performed until the music content stored in the memory card 209 is completed (step S107). Accordingly, downloading of the file data to the memory card 209 and linked playback of the music content and text data are executed in parallel.
[0053]
If it is determined in step 103 that simultaneous playback is not possible, only data download in step S109 is executed. When the end of data download is determined (step S109), the link table is read from the memory card 209 (step S110), and the music content and the text data are linked and reproduced (step S106).
[0054]
As described above, according to the data reproduction apparatus of FIG. 4, it is determined whether or not simultaneous reproduction is possible according to the arrangement order of the file data. If simultaneous reproduction is possible, reproduction is started from the time of downloading the music content and simultaneous reproduction is performed. If download is not possible, playback starts when file data download is complete. Accordingly, by inputting the simultaneous reproduction command, it is possible to start the reproduction of the file data, that is, the output of the sound and the display of the lyric text more quickly.
[0055]
At this time, according to the data distribution apparatus of FIG. 1, since the arrangement of the file data is control data → link table → text data → music content, when such file data is received by the data reproduction apparatus, The file data can be reproduced simultaneously. Therefore, the data distribution apparatus of FIG. 1 can realize a quicker start of link reproduction in combination with the data reproduction apparatus of FIG.
[0056]
Incidentally, the data reproducing apparatus of FIG. 4 cannot realize simultaneous reproduction unless the arrangement order of the file data is as described above. On the other hand, when the data distribution apparatus of FIG. 1 configures file data by itself, the file data can be configured in the above order. For example, when the file data configured by another data distribution apparatus is taken in by itself. Cannot guarantee the arrangement order of file data. In such a case, it is preferable to check the arrangement order of the file data at the time of distributing the file data, and when each packet is not in the above-mentioned order, it is reconfigured in the above-mentioned order to perform the data distribution. . As a result, the data reproduction apparatus shown in FIG. 4 can always perform simultaneous reproduction in response to a request from the user.
[0057]
FIG. 6 shows a processing procedure of the data distribution apparatus of FIG. 1 in such a case.
[0058]
When receiving the data distribution request, the controller 105 refers to the control data of the file data requested to be distributed (step S201), and the arrangement order of the file data is control data → link table → text data → music content. It is determined whether or not (step S202). If the order is not in this order, the arrangement of each packet is changed from control data → link table → text data → music content (step S203), and the “packet order” of the control data is changed to the order (step S203). S204). Then, each packet is stored in the transmission file so as to be in the above order, and is transmitted to the data reproducing apparatus.
[0059]
On the other hand, if it is determined in step S202 that the arrangement of the file data is control data → link table → text data → music content, the file data is transmitted as it is.
[0060]
By such processing at the time of transmission, the data reproduction apparatus can always receive file data in an order that allows simultaneous reproduction.
[0061]
Note that the above transmission process is not required when simultaneous reproduction is not performed on the data reproduction terminal side. Therefore, the above process may not be always performed, and the above process may be performed only when there is a simultaneous reproduction request from the data reproduction terminal. Such a simultaneous reproduction request is included in a download request from the data reproduction terminal.
[0062]
FIG. 7 shows a processing procedure in such a case. In the figure, steps S303 to S307 are the same as steps S201 to S205 in FIG. When there is a distribution request from the data reproducing apparatus, the controller 105 analyzes the distribution request (step S301), and determines whether the distribution request also requests simultaneous reproduction (step S302). If simultaneous playback is requested, the file data is transmitted after the file arrangement order and the control data are reconstructed as described above (steps S303 to S308). On the other hand, if the simultaneous reproduction is not requested, the file data is transmitted as it is (step S30 8 ).
[0063]
With this transmission processing, the data transmission device always transmits file data in the order in which simultaneous playback is possible when simultaneous playback is requested, and otherwise transmits the file data as it is without any particular processing. To come. As a result, simultaneous reproduction can be realized while improving processing efficiency.
[0064]
Although various embodiments according to the present invention have been described above, the present invention is not limited to such embodiments, and it goes without saying that other various modifications are possible. For example, in the above embodiment, the “packet order” is included in the control data, and thereby it is determined whether or not simultaneous playback is possible. For example, a flag indicating whether or not simultaneous playback is possible is included in the control data. In addition, it is possible to determine whether or not simultaneous reproduction is possible.
[0065]
In addition, the embodiments of the present invention can be variously modified as appropriate within the scope of the technical idea of the present invention.
[0066]
【The invention's effect】
As described above, according to the present invention, since file data is transmitted in the order of control data, additional data, and main data, link playback using the control data and additional data becomes possible at the reception timing of the main data. Therefore, data download and link reproduction of the download data can be performed in parallel. Thereby, the user can obtain the reproduction output more quickly without waiting for the download to be completed.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of a data transmission device according to an embodiment. FIG. 2 is a diagram for explaining a link table reproduction method according to the embodiment. FIG. 3 is a configuration of file data according to the embodiment. FIG. 4 is a diagram showing a configuration of a data reproduction device according to the embodiment. FIG. 5 is a diagram showing a flow of processing operations of the data reproduction device according to the embodiment. FIG. 6 is a diagram showing data according to the embodiment. FIG. 7 is a diagram showing a flow of processing operation of the transmission apparatus. FIG. 7 is a diagram showing a flow of processing operation of the data transmission apparatus according to the embodiment.
206 Controller 208 Memory card interface 209 Memory card

Claims (2)

Main data, additional data linked to the main data, a link table that manages the linking of the main data and the additional data, and control data that defines the transmission order of the main data, the additional data, and the link table A data reproduction method for receiving and reproducing file data including
A transmission order determination step for determining the transmission order of control data, link table, additional data, and main data with reference to the received control data;
A reception timing determination step of determining whether reception of the main data is started when the determined transmission order is control data, link table, additional data, and main data;
A reproduction start step for starting linked reproduction of the additional data, performing reproduction synchronized with the main data while referring to the reproduction of the main data and the link table in response to the start of reception of the main data,
The processing of each step is performed in parallel with the download of the file data to the storage means,
A data reproduction method characterized by the above. Main data, additional data linked to the main data, a link table that manages the linking of the main data and the additional data, and control data that defines the transmission order of the main data, the additional data, and the link table A data reproducing device that receives and reproduces file data including:
Storage means for sequentially storing the received file data;
A transmission order determining means for determining the transmission order of the control data, the link table, the additional data, and the main data with reference to the received control data;
A reception timing determination means for determining whether reception of the main data is started when the determined transmission order is control data, additional data, link table, main data;
Reproduction processing means for starting link reproduction processing of the additional data, performing reproduction synchronized with the main data while referring to the reproduction processing of the main data and the link table in response to the start of reception of the main data; Have
A data reproducing apparatus characterized by that.

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