JP2002091457A - Method for receiving contents through network and device for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance convenience while maintaining the convenience and protection of a user when a client receives contents through a network from a server. SOLUTION: A client can receive contents for provision being data in which pieces of music is recorded so as to be reproducible and contents for viewing being data in which a part of the pieces of music is recorded so as to be reproducible through a communication network from a server. Then, a user at the client side is urged to make a request for the selection of the piece of music reproducible in the contents for provision or the contents for viewing and the provision of the contents for provision or the contents for viewing. Then, in response to that the user transmits the request for the provision of the contents for viewing or the contents for provision of the selected piece of music to the server, and receives the requested contents for viewing or contents for provision from the server.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method and apparatus for receiving contents including data in which music is reproducibly recorded by a client device via a communication network, and a recording medium, for example, online music via a network. It can be applied in the case of selling contents.

[0002]

2. Description of the Related Art A typical form of music software to be sold today uses a CD (compact disk) medium, and all performance sounds including musical instrument performance sounds and singing voices of music are converted to PCM. (Pulse Code Modulation), which is digitally encoded and recorded on a CD. Meanwhile, MIDI (Musical Instrument Digit
Al Interface) media (MIDI music collections) on which music data composed of digital performance information of the standard are recorded are also sold. In the usual sales form of these music software, a user usually goes to a store and purchases desired media. In that case, it is not easy to listen to what kind of music is being sold, and at most it is possible to only listen to the limited listening music media prepared in advance at the store. Was.

On the other hand, in the field of so-called communication karaoke,
2. Description of the Related Art Transmission and distribution of karaoke software including MIDI performance information to terminals via a communication network has been conventionally performed. However, it is not a system in which an individual user can freely access the Internet and purchase desired music data, and therefore, it is not a system in which the user can listen to music before purchasing. Also, songs transmitted and distributed were limited to karaoke songs. Recently, with the spread of the Internet, a system for distributing music data composed of MIDI performance information from a server via the Internet in response to a request from a client has been partially operated. For example, recently, an Internet broadcast station has emerged as a form of providing a new program different from existing mass media such as radio and television. Internet broadcasters intend to distribute music programs via communication networks in response to requests from viewers.
That is, based on a viewer's distribution request from a terminal (client) such as a personal computer (PC),
Www via a communication network such as the Internet
(World Wide Web) server to receive a program composed of music data or video (video) data stored in the www server, and allow the client to reproduce the program based on the received data. It is intended to be

[0004]

However, there may be some music software that can be provided free of charge to all, but music data comprising MIDI performance information is usually economically valuable. Because of this, it is not preferable to be able to download music data without limitation through this type of Internet broadcast station. Therefore, using a system such as this type of Internet broadcasting station,
A new form of music software or content (content) sales system has been conceived such that music data composed of MIDI performance information and the like is distributed and sold from a server via a communication network in response to a purchase request from a client. I have. However, in a content sales system using such a network, there are various problems to be solved, such as how to enable a user to audition and how to deal with illegal copying after sale. And measures are inadequate. For example, if the audition system is not sufficient, users may not be able to motivate their purchases because the content is unknown,
Or, there is a problem such as giving a user unforeseen disadvantage by purchasing without knowing the contents. Another problem is how to guarantee or protect the content purchased and downloaded by the user. In other words, it is necessary to devise ways to guarantee the maintenance service and the like to the user, and also to make it easier to protect the copyright holders from the flood of illegal copying. Since various problems to be solved remain in this way, the number of people who provide content for sale to this type of new content sales system does not increase, and the content is purchased using this type of system. The number of users trying to increase the number did not increase, and this was one factor that hindered the spread of this kind of content sales system, which should be a convenient and easy-to-use system.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and when a client receives data from a server via a network including data in which music is reproducibly recorded, a content provider and a user ( The purpose of the present invention is to propose a device that can promote the use of this type of providing system while maintaining the convenience and protection of both the (purchaser) side. For example, when selling content, build a method or system that can motivate purchases by devising the structure of the content itself, and make it possible to build a method or system that pursues ease of trial. It also seeks to be able to build methods or systems that are useful for assuring and protecting sold content.

[0006]

The method according to the present invention comprises:
A method in which a client collects from a server via a communication network, a providing content that is data in which music is reproducibly recorded, and a trial content that is data in which part of the music is reproducibly recorded, the method comprising: A first step of connecting to the server at the client;
Based on the response from the server, the user is prompted to select the music that can be played back with the provided content or the trial content and request a provision of the provision content or a request of the trial content. A step of transmitting to the server a request for providing trial content of the music selected by the user in response to the processing of the second step or a request for providing content for providing the selected music in response to the processing of the second step; And a fourth step of receiving the trial content or the provision content of the music corresponding to the provision request transmitted in the third step. The client receives the content from the server.

According to the present invention, when the client connects to the server, the user selects a piece of music that can be reproduced as the provided content or the trial content and provides the provided content based on a response from the server. Request or a request to provide trial content, and in response to the request, transmit a trial content of the music selected by the user or a request to provide the content to the server to the trial content of the music in response to the request or The content to be provided is received from the server. In this way, separately from the content to be provided, which is data in which music is reproducibly recorded, trial content including a part thereof can be received, and the user can receive the content. Side to acquire this trial content so that it can be easily listened to. That the trial can be established a system of acquisition motivation and content confirmation of the content by, it becomes extremely easy to use for users.

[0008] As an example, the provision content received by the client is accompanied by additional information peculiar to the provision content, so that the presence of the additional information makes it possible to easily guarantee the provision content as legitimate provision content. It can be carried out. For example, when the provided content is received by the client in a state where the content cannot be normally reproduced only by the content, the unique additional information indicates that the received provided content can be normally reproduced by the client. Key information for restoring the information. As another example, the unique additional information is:
The received content to be provided can be identification information that can be individually specified. The identification information is, for example, purchaser information, a file unique value, or purchase date information. Thus, for example, when a simple illegal copy of the sold content is circulated, it is possible to specify the purchaser (user) or the like based on the presence of the additional information. Right holders can be protected. Also, if the content is stolen from the server by an illegal hacker or the like, or if illegal copies that remove the additional information from the sold content are circulated, the illegality is determined by the absence of the additional information. Can be recognized immediately,
Helps protect the rights of content suppliers and copyright holders. The unique additional information may be reproduction number limitation information that defines the number of times the received content to be provided can be reproduced.

The present invention can be constructed and implemented not only as a method invention, but also as a system or apparatus invention. Also, the present invention
The present invention can be implemented in the form of a program of a processor such as a computer or a DSP, and can also be implemented in the form of a recording medium storing such a program.
Further, the present invention can be implemented in the form of a method, an apparatus, or a program on a server side, or a recording medium thereof, and can also be implemented in the form of a method, an apparatus, a program, or a recording medium thereof on a client side.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram schematically showing the overall system configuration of an embodiment of the present invention.
A server 1 that provides contents and a user terminal (client) 2 that uses the contents are connected via a communication network 3 so as to be capable of two-way communication. The communication network 3 is not limited to a wired line, and may include other wireless lines such as a satellite communication line. Further, it is not limited to a public telephone line or the Internet, but may be a LAN or the like. The server 1, which is a content providing site, has 1
The number of the servers is not limited to the number, and each server 1 may be able to provide the content independently prepared. Of course, each server 1 includes a server computer on which necessary programs are installed so as to execute the processing according to the present invention, a database storing a large number of contents, and the like. The user terminal (client) 2 may be an ordinary personal computer, and is not limited to a general-purpose computer, but may be a microcomputer or a processor incorporated in a device having some special function such as an electronic musical instrument. May be executed. Of course, in the user terminal (client) 2, dedicated application software is installed so that the processing according to the present invention as described below as an embodiment can be executed.

FIG. 2 is a block diagram schematically illustrating a method of preparing contents in the server 1 and an example of information exchange between the server 1 and the user terminal 2. First, the “content to be provided” prepared on the server 1 side will be described. In the following embodiment, the "content for provision" is sold, and hence, it is hereinafter referred to as "content for sale". However, the content providing technology according to the present invention is not limited to the case of selling, and can be widely applied in providing content including music from a server to a user (client). That is, an embodiment in which content is provided without consideration is naturally included in the scope of the present invention. The content for sale (that is, the content to be provided) corresponding to one music is the MID of the music.
A file (hereinafter abbreviated as MIDI file) Mfile of I performance data (digital performance information for automatic performance conforming to the MIDI standard), and a file of audio information (hereinafter abbreviated as audio file) Afile related to the music And a file Gfile of an image and a musical score related to the music. Although not specifically shown in FIG. 2, the audio file Afile includes in-sound audio information (typically a singing voice and / or a chorus audio, or a special sound effect that is difficult to express in MIDI) which forms at least a part of the music. Voice waveform data) and MC
Commentary audio information (also audio waveform data) related to the music, such as audio, is included. Of course, the file of the audio information in the music in the audio file Afile is
At the time of music reproduction and performance, the music is reproduced in synchronization with MIDI performance data. Further, the commentary audio information in the audio file Afile may be automatically reproduced at an appropriate time before or after the start of the music, sometimes in the music, etc. according to a predetermined reproduction sequence. Depending on the selection, etc., it is also possible to independently call and reproduce the program at any time. Of course, the digital encoding format of these audio waveform data is not limited to the PCM, but may be any other appropriate data compression format. The commentary voice may be, for example, a commentary on a song in a style like a radio disc jockey, or may be a commentary on an appropriate style. Further, the file Gfile of the image and the music score is stored in the terminal
And a plurality of image files such as a background image displayed on the video display and other image files for explanation and the like, and a musical score file for displaying the musical score of the music image. Each of these image files may be automatically reproduced at an appropriate time such as before the start of a song, during the song, or after the end according to a predetermined playback sequence, or according to a selection by a user or the like. It can also be called up independently and reproduced for display. Of course,
The data included in the image file may be a moving image, a still image, or both.

[0012] A plurality of types of files Mfile, Afile, G having different characteristics as described above for one music piece.
A file is first produced, and sales contents and trial contents are created based on these files and stored in a database. FIG. 3 schematically shows a procedure example of such a server database construction process. First,
The files Mfile, Afile, and Gfile for one tune produced as described above are obtained, and a common tune ID (identification code) is assigned to the files (step S1). Next, in an appropriate area in the data of each file, various electronic signature information such as a copyright holder display, a maker display, a seller display, etc. are embedded in the form of digital watermark information, and the data amount is determined. A predetermined data compression process is performed on the data of the audio file Afile, the image, and the musical score file Gfile (step S).
2). Next, the data of each file in which the watermark has been embedded and the compression processing has been performed are combined into one, and a predetermined encryption process is performed (step S3).

Next, in step S4, key information is separated for each file from the encrypted data, and
IDI file Mc and encrypted audio file Ac
And a main part Cc of the content for sale composed of an encrypted image / music file Gc, and MIDI file key information M
k, audio file key information Ak, and image / music score file key information Gk, and a key information part Ck of the content for sale is created (see FIG. 2). The main part Cc of the content for sale is stored in the main database 4 of the server,
The music is stored in such a manner that it is read out and stored in association with the ID of the music. The key information part Ck of the content for sale is stored in the key database 5 of the server so as to be read out and stored in association with the ID of the music. In this way, the sales contents of each of the plurality of music pieces are separated into the main part Cc and the key information part Ck, and are stored in the databases 4 and 5 so that they can be managed by each music piece ID.

[0014] Therefore, the content for sale of one musical piece is composed of the main part Cc and the key information part Ck, and security measures are taken so that it cannot be reproduced only by the main part Cc. This ensures that even if the main database 4 is illegally invaded by a hacker or the like, or if data is stolen during download and transfer on the Internet, it cannot be easily reproduced unless all the data is collected. That's why. The above-described encryption processing in step S3 and the processing of embedding various watermarks in step S2 are also measures relating to the same security measures.

At this time, the songs are classified for each predetermined broadcasting station channel, and the guide information of the songs belonging to the channel can be called from the databases 4 and 5 in response to the channel designation call, so that the information is also managed for each channel. Is done. That is, in step S5, the ID of the song is stored in a table or the like in association with the channel to which the song belongs. When the user makes a channel designation call, a list of sales contents of songs belonging to the channel can be sent to the user with reference to the table. Note that the broadcast station channel is a concept of classifying a content supply source into a large number of channels based on the image of a broadcast station channel of a radio or a television so that a user can easily select the content. For example,
Channels may be classified according to various criteria such as music genres, performers, record companies, productions, and the like. Of course, one server 1 may correspond to a plurality of channels, or may correspond to only one channel.

Next, creation of trial contents will be described. In FIG. 3, in step S6, a part of the data of each of the watermark embedded and compressed files processed in step S2 is cut out as a sample. The data of each clipped file is data that is a source of trial content. In step S7, the resolution of the data of the predetermined file among the data of the extracted files is reduced, and the data of each file is subjected to a predetermined encryption process. This encryption process is also a security measure, but since it is a trial content, it may be simpler than the encryption of the main sale content performed in step S3. As for the method of reducing the data resolution, the sampling rate is reduced for audio files, and the resolution (dpi) is reduced for image / music files.
And so on. This is because the data amount of these files tends to increase, and the data amount of the entire trial content is reduced. Also, because the content is trial content, a slight reduction in resolution is considered to be within an allowable range. With such a contrivance, the data transfer efficiency of the trial content through the communication network can be improved. Next, in step S8, the clipped data of each file subjected to the encryption processing is stored as trial content in the trial content database 6 in association with the song ID. Then, the process of step S5 is performed, and the trial content stored in the trial content database 6 is associated with the ID and the channel. Therefore, when the user makes a channel designation call, a list of trial contents of songs belonging to the channel can be sent to the user.

Further, an example of a method of cutting out data for trial content from data of each file in step S6 will be described. For the user to listen to the music, it is desirable to cut out the performance data of the part that most strongly impresses the music as trial content. Therefore, MI
It is important to cut out the performance information from the DI file and the corresponding audio information in the music from the audio file. Therefore, an example of a method of creating trial content from such information will be described with reference to FIGS.

In FIG. 4, in step S10, MI
The performance pattern is analyzed from the performance data of the DI file, and the MIDI performance data is divided into a plurality of sections according to the analyzed pattern. For example, it may be divided into sections in which a specific repeating pattern is likely to appear, such as a measure unit. For example, when a similar performance pattern appears at intervals or repeats continuously, it is likely that it is a rust part or a characteristic part of the song. Seems effective. The reproduction time of the trial content may be designated and input, and the analysis and the segmentation of the performance pattern may be performed in units of the time corresponding to the designated input reproduction time. Next, in step S11, the envelope of the in-song audio information (singing audio and chorus audio) included in the audio file is detected, and the audio information is divided into a plurality of sections based on the detected increase / decrease tendency of the envelope. The envelope of the singing voice has a presence corresponding to a certain degree of excitement of performance or rust, etc., so that it can be a reference for searching for an important part of the music.

Next, in step S12, each section of the MIDI data and audio information divided in each of the above steps is collated to determine a cutout range (for example, a range considered to be a rust portion) characterizing the music. In this case,
If the important part of the song is clear from only one of the MIDI data and the audio information without considering the division into sections, the part may be determined as the cutout range. For example, if a similar performance pattern appears repeatedly in the MIDI data at intervals, and the location is often a rust portion of a song, a range related to the performance pattern is determined as a cutout range. You may do it. Or M
A representative pattern is extracted based on the similarity of the pattern in each section of the IDI data (for example, a pattern that appears repeatedly is a representative pattern), and a representative envelope section is determined from the tendency of the envelope in each section of the voice information. (For example, a portion indicating a climax) may be extracted, and the cutout range may be determined so as to include a portion where the representative pattern and the representative envelope section overlap.

FIG. 5A shows an audio envelope and MID.
FIG. 4 is a diagram schematically showing how an I-file pattern appears, in which pattern A is repeated and the first pattern A portion corresponds to the swelling of the audio envelope; decide. In the example of FIG. 5A, a cutout time is further specified, and a range for the specified time is further cut out from the determined cutout range.

Next, in step S13, data of a portion corresponding to the determined cut-out range is extracted from the MIDI file and the audio file, and information processing for performing fade-in and fade-out processing corresponding to the start and end of each portion, respectively. Perform processing and provide the processed content as trial content. FIG. 5B shows an example in which fade-in and fade-out processing is performed. The audio information (audio signal) is subjected to a fade-in and fade-out envelope, and MIDI is performed.
As for data, data for instructing volume up and volume down may be inserted. Other appropriate information processing may be performed in addition to the fade-in and fade-out processing.

Note that the image / music file is M
The music data corresponding to the cut-out range cut out as the trial content is cut out from the IDI file and the audio file (audio information in the music), and if there is an image corresponding to the cut-out range, it is cut out. If not,
A suitable image portion may be cut out. In addition, a display such as "SAMPLE" may be inserted into the data of the trial content of the image / music file, and it may be clarified that the trial content is the trial content when the trial content is reproduced. Further, the size of the sample image may be reduced. In addition, an appropriate portion may be cut out from the commentary sound in the audio file, and may not be cut out if unnecessary. As described above, the data of each partially extracted file is collected as a trial file and stored in the database 6 as described above. As another method of extracting the trial content, for example, the data of the trial content may be extracted from the portion where the watermark information is embedded in step S2. As described above, the cut-out range (for example, a rust portion) that characterizes a music is automatically determined in consideration of both the digital performance information of the music and the audio information (singing voice or chorus voice) included in the music. And trial contents can be created easily and efficiently.

Returning to FIG. 2, the profile server 7
Stores profiles (information such as song title, genre, artist, maker, label, file type, playing time, price, etc.) of each song stored in the databases 4, 5, and 6 in association with their IDs. is there. For example, in FIG. 3, in step S1, each file Mf
After obtaining the ile, Afile, and Gfile, the process of step S9 is appropriately performed to create a profile for the obtained music, and store the profile in the profile server 7 in association with the music ID. In this way, the main part Cc, the key information part Ck, the trial content, and the profile of the sale content of the song can be read from each of the databases 4 to 7 in accordance with the ID unique to one song.

Next, the processing on the user terminal (client) 2 side will be described together with the processing of the server 1 responding thereto. As shown in FIG. 2, the user terminal 2 includes dedicated application software 8 for performing processing according to the present invention. In addition, a Web browser 9 is provided for Internet communication. In addition, various functions necessary for carrying out the present invention, such as a reproduction function of MIDI performance data (including audible reproduction), an audible reproduction function of audio data, a reproduction function of image data by an electronic display and / or a printer, and the like. Of course, it has a function. The outline of the processing on the user terminal 2 side executed according to the special application software 8 is shown on the left side of FIG. The outline of the processing on the server 1 side which is bidirectionally executed in correspondence with the processing in the user terminal 2 is shown on the right side of FIG.

First, when the dedicated application software 8 is started on the user terminal 2, a request is made to the server 1 for a broadcast channel (step S20). At the same time, an operation panel as shown in FIG. 7 is displayed in an appropriate area on the display of the user terminal 2. In response to a request from the user, the server 1 stores information (such as genre and maker information) of the currently broadcastable channel on the user terminal
(Step S21). The user terminal 2 acquires the currently broadcastable channel information transmitted from the server 1 (step S22).

The “channel display” area on the operation panel shown in FIG. 7 indicates the name (site name or channel name or channel number) of the selected broadcasting station channel based on the acquired broadcastable channel information.
Is displayed to enable selection. For example, when the mouse is brought here, selectable channels are listed, and a desired broadcast station channel can be selected / changed by clicking a desired channel from among the selected channels. Is transmitted to the server 1 (step S23). In response, the server 1 transmits the IDs of the plurality of music pieces associated with the selected channel to the user terminal 2 (step S24). At the same time, audio for explaining a music list or the like prepared for the selected channel, or BGM music for giving an atmosphere is transmitted to the user terminal 2 by batch download or streaming. Sent by These voices and BGM music are audibly reproduced on the user side. This allows the user to relax and interact in an atmosphere just like listening to the radio. In the area of “program comment etc.” on the operation panel shown in FIG. 7, an introduction comment or the like of a program prepared on the selected channel is displayed.

In the "channel broadcast music" area on the operation panel shown in FIG. 7, the channel can be selected based on the music ID or the like transmitted as described above corresponding to the selected channel. Display the selection of music. For example, when the mouse is brought here, selectable songs are listed, and a desired song can be selected by clicking a desired song from among them, and the selected song ID is transmitted to the server 1. (Step S2
5). The song selection here corresponds to a sample request, that is, a selection of trial content. In this song selection (trial content selection), a plurality of songs can be selected collectively.

The server 1 reads out the trial content corresponding to the ID from the trial content database 6 in accordance with the song ID (selection of trial content) selected by the user, reproduces the trial content, and transmits it to the user terminal 2. Alternatively, the file is transmitted to the user terminal 2 as it is (step S26). To play the trial content on the server 1 and then send it to the user terminal 2,
Streaming transmission is performed, and the user terminal 2 audibly reproduces and visually displays the reproduction data of the trial content transmitted in streaming in real time (step S27). On the other hand, when transmitting the trial content from the server 1 to the user terminal 2 as a file, the user terminal 2 downloads the transmitted trial content, decodes the encryption of the data of each file, and performs audible reproduction and reproduction. Visual display is performed (step S27).
In this way, a sample of the content for sale can be previewed by the trial content. At the time of audition playback,
In a predetermined area below the operation panel in FIG. 7, a sampling frequency applied to audio information, a communication speed with a net, time information of a song, and the like may be displayed. The downloaded trial content is stored in the buffer while the dedicated application software 8 is being executed, and can be reproduced any number of times. In this case, the play button P on the operation panel shown in FIG.
It is possible to operate the LAY or the stop button STOP, operate the rewind button REW to rewind to a desired position, or operate the fast-forward button FF to fast-forward to the desired position. In addition, the user can freely designate a reproduction sequence of a plurality of trial contents, and reproduce the contents in accordance with the sequence. In that case, a simple BGM program can be configured. If the data transfer speed of the net is not high, it is not very advantageous to perform the streaming transmission in step S26. Therefore, when the data transfer speed of the net is sufficiently high, the streaming transmission in step S26 may be performed. The downloaded trial content stored in the buffer is deleted when the dedicated application software 8 is closed.

The More Info button Info on the operation panel shown in FIG. 7 appears on the operation panel in response to selection of a desired trial content or when the selected trial content is being reproduced. By clicking the button Info, further information about the trial content being reproduced, that is, the trial content being previewed, that is, profile information is requested (step S28). For example, in response to the click of the More Info button Info, it automatically connects to the Internet via a normal WEB browser 9 and automatically jumps to the address in the profile server 7 where the profile information of the song ID is stored ( In short, it is good to link). In response,
The profile server 7 reads out the profile information of the music ID and transmits it to the user terminal 2 (step S).
29).

When the user terminal 2 receives the profile information, the operation panel is switched to a screen as shown in FIG. 8, for example, and the contents of the received profile (song name, genre, artist, creator, label, file type,
Performance time, price, etc.). By clicking the purchase button, the user can purchase the sale content related to the song ID. The content for sale is not limited to all the files, and it is also possible to select and purchase only a part of the files. To do so, click the related product button. Click the related product button,
"Performance song", "Lyrics voice", "Commentary voice", "Music score",
A related product menu such as "image" and "other related music" is displayed, and it is possible to purchase a content by selectively combining desired items. Thereafter, when the purchase button is clicked, a purchase request is transmitted to the server 1 (step S30). The server 1 reads out the main part Cc and the key information part Ck of the corresponding content for sale from the databases 4 and 5 in accordance with the music ID sent together with the purchase request, and transmits them to the user terminal 2 (step S31). . The user terminal 2 downloads the received contents for sale, decodes the encrypted data for each file using the main part Cc and the key information part Ck, and restores the usable data (step S3).
2). At this time, if a purchase combination of only some files is selected in step S30, only the selected files are decoded and made available, and data of other unselected files are discarded without decoding. . Of course,
The present invention is not limited to this, and the server 1 may read out only the data of a part of the files for which the purchase combination has been selected and transmit the data to the user. Since the purchase combination of only some files can be selected in this way, the convenience of the user can be improved.

Further, a process of adding specific additional information to each file of the purchased content for sale for each individual purchase is performed (step S33). The additional information includes “purchaser information”, “file unique value” (serial number), “purchase date”, “purchased site name (address)”, and the like. This additional information may be added as simple text in each file of the purchased content for sale, or may be embedded as watermark information in the data of the content. By adding unique additional information to the content sold (purchased) in this way, it is stamped as a genuine purchase, and it functions as a warranty for the user, This is a proof that you will receive a product warranty during the warranty period and a warranty for the maintenance service, and will help protect users. Further, it is clear that the content in which such additional information does not exist is an illegal product, which is useful for protecting the rights of the creator and the copyright holder against unauthorized copying and the like.

It should be noted that a machine ID may be further added as additional information according to the type of file. The machine ID is an ID number unique to an individual computer used by a user, and a file to which the machine ID is added is restricted so that it can be reproduced only by a computer corresponding to the machine ID. For example, if the MIDI file is too limited for the playback machine, the usability is rather poor. Therefore, no additional machine ID is added, and other audio files, image and music files are stored on the machine I.
D is added as additional information. Also, to prevent flooding of hard copies of image and music files, when printing out image and music files, the name of the copyright holder and the name of the purchaser embedded in the file are also printed out. Good to do. In this case, the machine ID may be composed of, for example, a user ID and a password, and may be adapted to the case where the hardware of the terminal computer is changed. The additional information may be added to the content for sale transmitted on the server 1 side.

It should be noted that the content may be purchased at a lower price than usual with a limited number of reproductions. For example, when a related product is selected by clicking a related product button in FIG. 8, a plurality of sales amounts are presented to the user for the same content for sale so that the user can select a desired amount. . For this purpose, the process of step S30 in FIG. 6 may be changed as such. Then, the reproduction frequency limitation information corresponding to the selected sales price is added to the content for sale provided to the user when the purchase of the user is confirmed. For this purpose, the process of step S33 in FIG. 6 may be changed as such. Alternatively, the server 1 may embed the limited number of times of reproduction as watermark information in the content and distribute it to the user. Thereafter, the number of reproductions of the content purchased by the user is managed, and when the number of reproductions corresponding to the reproduction number limitation information recorded as the additional information is reached, the content cannot be reproduced. As a method of managing the number of times of reproduction in this case, for example, data of the number of times of reproduction is recorded as rewritable information in the content, this data is initially recorded as 0, and counted up every time reproduction is performed. do it. Then, when the number-of-reproductions data reaches the number-of-reproductions limitation information, a display or notification such as "cannot be reproduced because the number of times specified at the time of purchase has been reached" may be given to the user. Further, at the time of reproducing the content, a display or notification such as “how many times can be reproduced.” May be made to the user.

When reproducing the content, it is desirable to perform the reproduction while appropriately synchronizing the files. An appropriate method may be used as a synchronous reproduction method for that purpose. The simplest method of synchronizing MIDI files, audio files, and image files is to create data with their playback times adjusted in advance and start playback of these files simultaneously to achieve natural synchronization. Will be. As another method, at the timing when an audio file or an image file is to be started, start instruction data is incorporated in the MIDI file as, for example, exclusive data, and the exclusive data is read out in synchronization with the playback of the MIDI performance. Thus, these audio files or image files may be activated. In this case, the start time of the audio file or the image file also changes in conjunction with the change in the tempo of the MIDI performance.

Further, the reproduction timing of each data of the MIDI file, the audio file, and the image file is determined in accordance with the lapse of time from the start of the reproduction by using the reproduction schedule management information for integrally managing the reproduction schedules of all the files. Each may be managed. Since the playback tempo of the MIDI file is fixed, the time elapsed from the beginning of the playback can be determined by adding a meta event indicating the timing between the events, and the time of the portion to be played back can be grasped. Also, in the audio file, since the reproduction sampling frequency is determined, the elapsed time from the start of reproduction at each sample point position is determined, and the time at each sample point position can be grasped. In the image file, time information from the start of reproduction may be input to each frame of the image in advance. As a result, each file can be integrated and managed on a common time axis from the start of playback, and even if the playback processing of each file is performed by a separate routine, each file is adjusted so that its playback time position matches. The playback position of the file may be corrected at any time. As described above, by properly synchronizing the reproduction of each file, it is possible to selectively regenerate the data by rewinding or fast-forwarding the data of a plurality of downloaded songs. Also, in a system using MIDI exclusive or a system in which the playback time is managed in an integrated manner, a playback instruction at a specific location such as a specific bar in a music can be easily performed.

As shown in FIG. 9A, the user terminal 2
May be a wireless mobile terminal 20 such as a mobile phone or a PHS. In this case, it is assumed that the wireless portable terminal 20 has an appropriate tone generation function (sound source function or sequencer function). FIG. 9B is a block diagram showing an example of the internal configuration of the wireless portable terminal 20 having a tone generation function. The wireless mobile terminal 20 includes a normal mobile phone side circuit 21.
In addition, a microcomputer including a CPU 22, a RAM 23, and a ROM 24 is built in. The mobile phone side circuit 21 and the microcomputer communicate with each other via a communication interface 25. Mobile phone side circuit 2
1 has an Internet function or a simple Internet function. When a wireless telephone connection with the server 1 is established during Internet communication, the connection between the built-in microcomputer and the server 1 via the internal communication interface 25 is established. Enable information communication. R
The OM 24 stores programs and data necessary for the tone generation function, and further stores application software according to the present invention. In this case, RO
A rewritable memory such as a flash ROM may be used as the M24 so that the program or data for generating a musical sound or the content of the application software according to the present invention can be updated at any time.

The functions of various switches and a mouse for input operation use switches provided in the cellular phone side circuit 21. In that case, the switch operation information in the cellular phone side circuit 21 is received by the built-in microcomputer through the internal communication interface 25,
The processing according to the present invention described above proceeds in accordance with these operation input signals. In addition, various data such as trial contents or contents to be provided received from the server 1 in the course of this processing is sent from the mobile phone side circuit 21 to the built-in microcomputer via the communication interface 25,
It is stored in the RAM 23. Furthermore, various display data generated by the built-in microcomputer is sent to the mobile phone side circuit 21 via the communication interface 25, and can be displayed on the display. Also, the performance data generated by the built-in microcomputer can be sent to the mobile phone side circuit 21 via the communication interface 25, and transmitted to a desired terminal via a wireless telephone line. The music reproduction data generated by the built-in microcomputer is also transmitted to the communication interface 25.
To the circuit 21 on the mobile phone side, and sound can be emitted from its built-in speaker. Note that a MIDI interface 26 may be provided so that MIDI performance data can be transmitted to and received from the outside. Furthermore, the desired data among the musical sound / tone data, music data, image data, etc., which are fetched from the server 1 as described above, are stored by appropriate means, and these are stored as ringtones, ringtones or ringtones of the mobile phone. Can be used as image data or the like that informs the user. In addition, of these musical tones / tone data, music data, image data, etc.,
It can also be used as background music during a call or as a background visual image. The wireless mobile terminal 20 is not limited to a dedicated mobile phone, but may be any other suitable mobile device (for example, a mobile navigator) provided with a mobile phone function or a wireless communication function.

[0038]

As described above, according to the present invention, when the client connects to the server, the user is allowed to select a music piece that can be reproduced as the provided content or the trial content based on the response from the server. In response to the request, the request for providing the trial content or the provision content for the music selected by the user is transmitted to the server. In this way, the trial content or the provision content of the music is received from the server. In this way, the trial content including a part of the provision content, which is data in which the music is reproducibly recorded, is separately provided. The user can acquire this trial content and listen to it easily. By the wear way, the trial can establish a system acquisition motivation and content confirmation of contents by, it becomes extremely easy to use for users, an excellent effect that.

Also, as an example, by providing the provided content received by the client with additional information unique to the provided content, the presence of the additional information guarantees that the provided content is legitimate provided content. It can be done easily. For example, it is easy to guarantee the maintenance service and the like to the user, and when a simple illegal copy of the distributed content is circulated, the presence of this additional information indicates that the legitimate acquirer (user) or the like is not allowed. It can also identify content, protect content suppliers and copyright holders from the proliferation of illegal copying, and when content is stolen from servers by illegal hackers, etc., or from distributed content In the event that illegal copies with additional information removed illegally appear,
The impropriety can be immediately recognized by the absence of the additional information, which is useful for protecting the rights of the content supplier and the copyright holder.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an overall system configuration according to an embodiment of the present invention.

FIG. 2 is a block diagram schematically illustrating a method of preparing content in a server, and showing an example of information exchange between the server and a user terminal. FIG. 1 is a block diagram schematically illustrating an overall system configuration according to an embodiment of the present invention.

FIG. 3 is a flowchart schematically illustrating a procedure example of a server database construction process.

FIG. 4 is a flowchart showing an example of a method for creating trial content.

FIG. 5 is a diagram showing an example of cutting out a sample serving as trial content based on a relationship between an audio envelope and a MIDI file pattern.

FIG. 6 is a flowchart showing a schematic example of a process executed bidirectionally between a user terminal and a server.

FIG. 7 is a diagram illustrating an example of an operation panel in a user terminal.

FIG. 8 is a diagram showing another display example of the operation panel on the user terminal.

FIG. 9 is a block diagram showing an example in which a wireless portable terminal is used as another example of the user terminal.

[Explanation of symbols]

 Reference Signs List 1 server 2 user terminal (client) 3 communication network 4 main database of content for sale 5 key information database of content for sale 6 database of trial content 20 wireless portable terminal

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H04N 7/173 640 H04N 7/173 640A (72) Inventor Hiroaki Takahashi 10-1 Nakazawacho, Hamamatsu City, Shizuoka Prefecture Yamaha Corporation (72) Inventor Yoshinari Terada 10-1 Nakazawacho, Hamamatsu-shi, Shizuoka Prefecture F-term (reference) 5C064 BA01 BA07 BB05 BB07 BB10 BC06 BC07 BC18 BC20 BC25 BD02 BD08 BD09 5D378 QQ08 QQ30 QQ38

Claims (12)

[Claims] 1. A method in which a client receives from a server via a communication network a providing content which is data in which music is reproducibly recorded and a trial content which is data in which part of the music is reproducibly recorded. In the client, a first step of connecting to the server, and selection of the music that can be reproduced by the user with the provided content or the trial content based on a response from the server And a second step of prompting the provision request of the provision content or the provision request of the trial content; and a provision request of the trial content of the music selected by the user in response to the processing of the second step, or a request of the selected music. A third step of transmitting a provision request for provision content to the server; Receiving the trial content or the providing content of the music corresponding to the providing request transmitted in the step, and receiving the content from the server by the client according to a procedure of receiving the content from the server. . 2. The method according to claim 1, wherein the content to be received received in the fourth step is transmitted together with additional information unique to the content to be provided. 3. The content to be provided is received in a state in which normal reproduction cannot be performed with the content alone, and the unique additional information is set to a state in which the received content to be supplied can be normally reproduced. 3. The method for collecting contents via a network according to claim 2, which is key information for restoring. 4. The content receiving method via a network according to claim 2, wherein the unique additional information is identification information capable of individually specifying the received providing content. 5. The content collection method via a network according to claim 2, wherein the unique additional information is playback number limitation information that defines the number of times the received content to be provided can be played. 6. The providing content includes at least one of performance data, audio data, and image data, and the second step includes providing the providing content received in the fourth step. It is also urged to select the configuration content of the content from the performance data, the audio data, and the image data, and the fourth step transmits the providing content configured with the selected configuration content to the client. The method of claiming contents via a network according to claim 1. 7. The content collection via a network according to claim 6, wherein the trial content is composed of predetermined one or more of performance data, audio data, and image data. Method. 8. The second step also urges a request for providing profile information representing a profile of a song, and the third step also transmits a request for providing profile information of a song selected by the user. The method according to claim 1, wherein the fourth step receives the profile information corresponding to the profile information provision request transmitted in the third step. 9. The server is capable of providing a plurality of songs to the client, wherein each of the plurality of songs belongs to any of a plurality of channels, and selects the channel. The method according to claim 1, further comprising a fifth step of prompting, wherein the second step prompts selection of a song belonging to the channel selected in the fifth step. 10. The method according to claim 1, wherein in the fourth step, the trial content is received by streaming transmission, and the provided content is received by download. 11. A storage medium readable by a computer, wherein the storage medium stores a program executable by the computer for realizing the content receiving method according to any one of claims 1 to 10. Medium. 12. A client device for receiving, from a server device via a communication network, a providing content, which is data in which music is reproducibly recorded, and a trial content, which is data in which part of the music is reproducibly recorded. Means for connecting to the server device, and selection of the music and reproduction content that can be reproduced by the provision content or the trial content for a user based on a response from the server. Means for prompting the user to provide a request for providing the trial content or the request for providing the trial content; and transmitting, to the server, a request for providing the trial content for the song selected by the user or a request for providing the content for providing the selected song in response to the prompt. Means for performing the trial content or the previous content of the music corresponding to the transmitted provision request. Client device comprising the means for receiving the offer content.