KR100581017B1 - Modified music play system and modified music manufacturing method and modified music play method - Google Patents

Abstract

The present invention relates to a modified sound source playback system, a method for producing a modified sound source, and a method for reproducing a modified sound source for the same, which can be changed and played back in various ways to suit a user's taste in a wireless terminal. Extracting the analysis data which is the difference between the reference SMAF data produced in the line and the modified SMAF data modified therefrom, and producing the reference SMAF data, the analysis data and the playback program as a single file sound source content and uploading them online. At least one computer, at least one sound content server that services sound content uploaded from the computer to be downloaded via wired or wireless internet, and downloads sound content from the sound content server in real time Change the volume, volume, tempo, etc. And at least one wireless terminal for playing back new SMAF data.

2

Description

Modified music play system and modified music manufacturing method and modified music play method

1 is a diagram schematically illustrating a relationship between a computer that provides reference SMAF data and analysis data, a sound source content server, and a wireless terminal that reproduces new SMAF data as a modified sound source playback system according to the present invention.

FIG. 2 is a block diagram illustrating a MIDI generation / analysis unit and an SMAF generation / analysis unit implemented in a computer in the modified sound source reproduction system according to the present invention.

3 is a block diagram showing the configuration of a new SMAF data generation unit, sound source playback unit, etc. implemented in a wireless terminal of the modified sound source playback system according to the present invention.

4 is a flowchart sequentially illustrating a method of producing a modified sound source according to the present invention.

5 is a flowchart showing in detail the analysis data generation step of the modified sound source production method according to the present invention.

FIG. 6A is a diagram showing the difference between the reference SMAF data and the modified SMAF data having the same size in FIG. 5, FIG. 6B is a diagram showing an example of generation of the analysis data, and FIG. 6C is different from the reference SMAF data having different sizes. A diagram showing the difference between modified SMAF data.

7 is a flowchart showing a method of reproducing a changed sound source according to the present invention.

8 is a flowchart illustrating a new SMAF data generation method in detail in the modified sound source reproduction method according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100; Computer 110; MIDI generation / analysis section

111; MIDI generation module 112; Input

113; MIDI generator 114; Output

115; MIDI analysis module 116; Input

117; Feature value extractor 118; Output

120; SMAF generation / analysis unit 121; SMAF Generation Module

122; An input unit 123; SMAF generator

124; An output unit 125; SMAF Analysis Module

126; Input unit 127; Analysis data generator

128; An output unit 200; Sound recording content server

300; Wireless terminal 310; Selection

320; A new SMAF data generator 330; Sound source playback section

delete

The present invention relates to a modified sound source playback system, a method for producing a modified sound source, and a method for reproducing a modified sound source, which will be described in more detail in the wireless terminal to variously change pitch, tone, volume, and tempo to suit a user's taste. The present invention relates to a changeable sound source reproducing system capable of reproducing, a method of producing a changed sound source for the same, and a method of reproducing the changed sound source.

Currently, in order to service sound source contents in domestic wireless terminals, files must be produced in a form suggested by a foreign company which is a music playback chip manufacturer. The conventional method of producing such a sound source file and playing the same, comprises the steps of producing a MIDI file for the sound source to be serviced, and converting the MIDI file into a playable sound source in the wireless terminal using software provided by the sound source playing chip manufacturer. And a step of including the converted sound source file for the wireless terminal in the sound source content and reproducing the sound source using an API (Application Programming Interface) provided by the sound source reproducing chip manufacturer.

However, the content of the sound source on the wireless terminal being serviced provides only a function of simply playing (playing) and stopping, and the sound source may be changed to various pitches, tones, volume, There is a problem that playback cannot be performed by changing to a tempo or the like.

In addition, the prior art has to provide the number of sound sources in order to change the pitch, tone, volume, tempo, etc. in a single sound source, there is a problem that is practically impossible due to the nature of the wireless terminal because the size of the sound source content is too large.

In addition, the sound source used in the conventional wireless terminal is not only slightly degraded sound quality due to the limitation of the file size, but because the API simply plays and stops as described above without any other functions, users get tired more easily than offline karaoke. Satisfaction is also a problem.

As described above, the reason why the sound source cannot be variously changed and reproduced in the prior art and the sound quality is slightly degraded is as follows.

First, the size of the sound source file itself is limited to about 90 ~ 100K bytes due to the nature of the wireless terminal resources.

Second, the memory size used when loading the sound source is limited to about 160K ~ 650K bytes.

Third, since the sound source playback chip installed in most wireless terminals currently used in Korea uses foreign companies, it is necessary to use sound source file formats and APIs provided by foreign companies.

Fourth, because foreign companies do not disclose the data format of the sound source, music content service companies have to produce a single raw sound source to make a variety of sound sources because it is impossible due to the memory size limitation of the wireless terminal.

For example, the sound source used in a karaoke for a wireless terminal is about 30-40K bytes. Therefore, it is difficult to enter two or more even if a sound source that changes pitch, tone, and the like is provided together. Considering that there is also a program source and image data for the karaoke itself because the size of the sound source content is limited to about 100K bytes, it is almost impossible to insert about 2 sound sources.

Fifth, even if a foreign company releases the sound source data format, it takes a considerable amount of memory and time to operate and process on the poor terminal hardware.

The present invention is to overcome the above-mentioned problems, an object of the present invention is to change the reproduction of the sound source, tone, volume, tempo, etc. in accordance with the user's taste in the wireless terminal and a modified sound source playback system and The present invention provides a method of producing a modified sound source and a method of playing a changed sound source.

In order to achieve the above object, the modified sound source reproducing system according to the present invention extracts analysis data which is a difference between the reference SMAF data produced offline and the modified SMAF data modified therefrom, and the reference SMAF data, analysis data and At least one computer for creating a playback program as one file of sound content and uploading it online;

At least one sound source content server which services the sound source contents uploaded from the computer to be downloaded via wired or wireless Internet; And,

It may include at least one or more wireless terminals to download the sound source content from the sound source content server to change the pitch, tone, volume, tempo, etc. in real time to reproduce the new SMAF data.

The computer is

A MIDI generation / analysis unit for changing the reference MIDI data to the desired pitch and outputting the reference MIDI data and the pitch change MIDI data; And,

The reference MIDI data and the pitch change MIDI data output from the MIDI generator / analysis unit are input to a program provided by a foreign sound reproducing chip manufacturer, and the reference SMAF data and the pitch, tone, volume, Converts tempo-changed SMAF data and compares reference SMAF data with modified SMAF data to extract analysis data that differs in pitch, timbre, volume, and tempo, thereby reducing reference SMAF data, pitch analysis data, tone analysis data, and volume analysis data. It may include a SMAF generation / analysis unit for outputting tempo analysis data.

The wireless terminal

A selection unit for changing and selecting the pitch, tone, volume, tempo, etc. of the reference SMAF data;

A new SMAF data generator for generating new SMAF data using the reference SMAF data and at least one analysis data by the selection; And,

And a sound source playback unit for loading and playing back new SMAF data from the new SMAF data generation unit.

The MIDI generation / analysis unit

delete

delete

A MIDI generation module configured to generate and output MIDI data whose pitch is changed from the reference MIDI data when reference MIDI data is input; And,

The MIDI analysis module may be configured to compare the reference MIDI data with the pitch change MIDI data, extract feature values, and output the feature values back to the MIDI generation module.

The MIDI generation / analysis unit

When a characteristic value from the MIDI analysis module is input to the MIDI generation module, a plurality of pitch change MIDI data are produced using the characteristic value, and the SMAF generation / analysis of the reference MIDI data and a plurality of pitch change MIDI data is performed. You can output negative.

The SMAF generation / analysis section

A SMAF generation module for outputting pitch, tone, volume, and tempo change SMAF data using reference SMAF data for reference MIDI data and a plurality of pitch change MIDI data; And,

Comparing the reference SMAF data and the pitch, tone, volume, and tempo-changing SMAF data to generate pitch analysis data, tone analysis data, volume analysis data, and tempo analysis data, which are mutually different, and generate the plurality of analysis data and the reference SMAF. SMAF analysis module for outputting data.

In addition, in order to achieve the above object, the method for producing a modified sound source according to the present invention comprises generating MIDI data whose pitch is changed using reference MIDI data, and outputting the reference MIDI data and the pitch changed MIDI data;

A feature value extraction step of analyzing the reference MIDI data and the pitch change MIDI data and extracting feature values that are mutually different values;

A final MIDI data output step of generating a plurality of pitch change MIDI data using the characteristic value and outputting the plurality of pitch change MIDI data and reference MIDI data;

SMAF data generation step of outputting the pitch, tone, volume, tempo change SMAF data using the reference SMAF data for the reference MIDI data and a plurality of pitch change MIDI data;

An analysis data generation step of comparing the reference SMAF data and the pitch, tone, volume, and tempo change SMAF data to generate pitch analysis data, tone analysis data, volume analysis data, and tempo analysis data which are mutually different from each other; And,

And a data output step of outputting the reference SMAF data and a plurality of analysis data.

The analysis data generation step

When the size between the reference SMAF data and the change SMAF data is the same,

Collecting a change portion between the reference SMAF data and the change SMAF data;

Generating analysis data with the characteristic formula and the change position if there is a possibility of formalization; And,

If there is no possibility of formulating, the analysis data may be generated using the change position and the change value.

The analysis data generation step

If the size between the reference SMAF data and the change SMAF data is different,

Analyzing differences (deletion, insertion information) between the reference SMAF data and the modified SMAF data; And,

The analysis data may be generated by deleting or inserting the difference data.

In addition, in order to achieve the above object, the modified sound source reproduction method according to the present invention comprises the steps of downloading the sound source content of the reference SMAF data, a plurality of analysis data and the reproducing program from the sound source content server to the wireless terminal;

Selecting and changing at least one of pitch, tone, volume, and tempo to be played in the wireless terminal;

Generating new SMAF data using the reference SMAF data and analysis data; And,

And loading and playing the new SMAF data.

The new SMAF data generation step

delete

delete

Loading reference SMAF data from the sound source content;

Calculating and substituting the reference SMAF data in real time using the analysis data according to a selected pitch, tone, volume, or tempo; And,

And generating new SMAF data modified by the calculation and substitution.

As described above, the modified sound source reproducing system according to the present invention, the modified sound source production method, and the changed sound source reproducing method therefor provide a sound source having various pitches, tones, volume, and tempo provided by an offline karaoke, for example. Accordingly, by changing to a taste, it is possible to change a song to one's taste and to listen to or listen to it.

In addition, by overcoming the qualitative difference between the offline karaoke and the karaoke of the wireless terminal by this function, the user's satisfaction can be increased, thereby enabling a higher quality service.

In addition, such a function according to the present invention can be applied not only to a karaoke function but also to a ringtone, a music album, a juke box, and the like, so that the personality of a wireless terminal user can be more variously expressed.

Here, some terms are first defined before explaining the present invention in detail.

1. MIDI file: A digital audio format widely used in offline karaoke or PC. It stands for Musical Instrument Digital Interface. Although audio quality is lower than that of wave files, the size is small and the format is used to specify the sound source using various instruments. Therefore, it is widely used due to the convenience of easily changing the instrument, pitch, and tempo. The standard format for MIDI files is already open.

2. SMAF: The above MIDI files are also burdensome to use on the wireless terminal, and since they are difficult to mix with the wave files, the compressed file formats are further used in the wireless terminal. This is called SMAF, and the following is an excerpt from the detailed description of the music player chip manufacturer.

“SMAF stands for Synthetic music Mobile Application Format and is a multimedia data format developed by Yamaha. The SMAF specification defines the format of multimedia files that can be played on mobile devices. SMAF files have the advantages of smaller file size and better expressive power than SMF (standard MIDI) files.

Currently, SMAF is mainly used for making mobile phone ringtones, but as an extension of SMAF, text and graphics can be displayed. In this way, SMAF offers great features and possibilities for creating multimedia content for mobile phones. ”

3. Tracks and Channels: A term used in a midi file, where tracks are musical scores and channels are musical instruments. Usually one channel is defined for one track.

4. Pitch: It means the pitch of the note. It is the same as 'Dosola'. To raise two pitches is to "rareshi" (including semitones) by playing "Dosol" up two levels.

5. Tone: Refers to the overall atmosphere of the instruments playing the song. Even the same song refers to the ecstatic feelings played by electronic instruments and the magnificent feelings played by orchestras.

6. Volume: Means the volume. MIDI files and SMAF can adjust the volume for each channel (instrument).

7. Tempo: The word indicates the speed of the song. Tempo 120 means play a quarter note 120 times for 1 minute. In other words, if the tempo is large, ‘fast’ and if the tempo is small, ‘slow’ is felt.

8.CRC error check: A CRC error check is a value at a file-specific location that determines whether the data requested when sending or receiving data, and when the data is read, is intact and the data is correct. Attached to, the calculation algorithm is public.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings such that those skilled in the art may easily implement the present invention.

Referring to FIG. 1, a modified sound source playback system according to the present invention includes a computer 100 for providing reference SMAF data and analysis data, a sound source content server 200, and a wireless terminal 300 for playing back new SMAF data. The relationship between them is shown in a schematic block diagram.

As shown, the modified sound source reproducing system according to the present invention includes at least one or more computers 100 in which reference SMAF data and analysis data are produced as one sound source content, and provided therewith, and at least one sound source content in which the sound source content is uploaded. Server 200 and at least one wireless terminal 300 to download the sound source content from the sound source content server 200 to play the changed SMAF data.

First, the computer 100 extracts the analysis data between the reference SMAF data produced offline and the modified SMAF data changed therefrom, and produces the reference SMAF data, the analysis data, and the reproducing program as a single sound source content. To upload to the sound source content server 200 online.

In addition, the sound source content server 200 services so that sound source content uploaded from the computer 100 can be downloaded to a plurality of wireless terminals 300 via wired or wireless Internet.

In addition, the wireless terminal 300 reproduces new SMAF data produced by downloading sound source content from the sound source content server 200 and changing pitch, tone, volume, and tempo in real time.

2, there is shown a block diagram of the MIDI generation / analysis unit 110 and SMAF generation / analysis unit 120 implemented in the computer 100 of the modified sound source playback system according to the present invention.

As shown, the computer 100 includes a MIDI generation / analysis unit 110 and a SMAF generation / analysis unit 120. Of course, the computer 100 has a MIDI conversion unit for converting the sound source to be serviced to the MIDI data to transmit to the MIDI generation / analysis unit 110, this is not shown. Through the MIDI conversion unit, unnecessary data is deleted to suit the wireless environment, thereby minimizing its size.

Meanwhile, the MIDI generation / analysis unit 110 includes a MIDI generation module 111 consisting of a MIDI data input unit 112, a MIDI data generation unit 113, and a MIDI data output unit 114, an input unit 116, and characteristics. The MIDI analysis module 115 includes a value extraction unit 117 and an output unit 118.

First, when reference MIDI data is input through the input unit 112, the MIDI generation module 111 changes the pitch of the MIDI data (for example, +5 degrees up) from the reference MIDI data through the generation unit 113. MIDI data). Then, the pitch-changed MIDI data is output to the MIDI analysis module 115 through the output unit 114.

Subsequently, when the pitch-changed MIDI data is input through the input unit 116, the MIDI analysis module 115 compares the reference MIDI data and the pitch-changed MIDI data to each other through the characteristic value extractor 117, and the difference thereof. Extract the characteristic value that is the value. If the MIDI data changes only the pitch of the same song, the change occurs only in the byte that handles the internal pitch of the data. In other words, when one byte value of the basic MIDI data is 0x32, the byte value of the same address of the MIDI data changed +2 degrees is 0x34. Looking at the MIDI data with a -1 degree change, it is 0x31. The gathering information of the addresses that define the pitches affected by this pitch change is called feature value extraction. Using the characteristic values extracted in this way, standard MIDI data serving as a parent of SMAF data is automatically generated. In other words, to generate MIDI data having a pitch of +1 degree from the basic MIDI data by using the meeting information of the addresses extracted as the characteristic values, after generating +1 to each value of the corresponding address and storing This is referred to as +1 degree change MIDI data. The number of parent standard MIDI data can be adjusted to suit the taste of the user who will use the actual service. The reason why this method is used in standard MIDI data generation method is that it takes a long time to work with all desired MIDI data one by one, and even if it is made by professional work program, the header of MIDI data is wrong (work date, version, etc.). This is because the SMAF data becomes more complicated when generating the SMAF data. In fact, there is no difference in producing MIDI data in the inventor's method, in a professional program, or in performance, and it also works in the generated SMAF analysis.

Here, the +5 degree pitch raising action of the MIDI generation unit 113 is only one example, which does not limit the present invention. For example, the MIDI generator 113 may generate various pitch-modified MIDI data such as +3 degrees or +8 degrees in addition to +5 degrees.

Subsequently, the MIDI generation unit 113 of the MIDI generation module 111 generates a plurality of MIDI data, for example, +1 to +12 degrees, by using the characteristic value, and further outputs to the output unit 114. The reference MIDI data and a plurality of MIDI data changed by +1 to +12 degrees are input to the SMAF generation / analysis unit 120. Here, the present invention is not limited to the MIDI data of which pitches are changed by +1 to +12 degrees, and for example, the generation of MIDI data that is pitch changed from -1 to -12 degrees can also be generated.

Subsequently, the SMAF generation / analysis unit 120 includes a SMAF generation module 121 and a SMAF analysis module 125. In addition, the SMAF generation module 121 includes an input unit 122, an SMAF generation unit 123, and an output unit 124. The SMAF analysis module 125 includes an input unit 126 and an analysis data generation unit 127. ) And an output unit 128.

First, the SMAF generation module 121 uses the reference MIDI data output from the MIDI generation / analysis unit 110 and a plurality of MIDI data changed by +1 to +12 degrees to the reference SMAF data and the plurality of pitch change SMAF data. Convert to and print it out. Here, the MIDI generation / analysis unit 110 converts and outputs a tone, volume, and tempo change SMAF data in addition to the pitch change SMAF data. This can be done by adjusting the options of the SMAF conversion program provided by the sound reproducing chip manufacturer.

In more detail, when reference MIDI data and a plurality of pieces of MIDI data that are changed in pitch are input through the input unit 122 of the SMAF generation module 121, the SMAF generation unit 123 not only adjusts the pitch, but also the tone and volume. The tempo change SMAF data is also generated, which is output through the output unit 124. In other words, reference SMAF data, a plurality of pitch change SMAF data, a tone change SMAF data, a volume change SMAF data, and a tempo change SMAF data are output to the SMAF analysis module 125 through the output unit 124.

Subsequently, when the reference SMAF data and the plurality of modified SMAF data are input through the input unit 126 of the SMAF analysis module 125, the analysis data generator 127 mutually exchanges the reference SMAF data and the plurality of modified SMAF data. Compare and generate analytical data. That is, the analysis data generator 127 extracts analysis data of a plurality of pitches, tones, volumes, and tempos. Subsequently, the output unit 128 outputs reference SMAF data, pitch analysis data, tone analysis data, volume analysis data, and tempo analysis data.

Referring to Figure 3, the configuration of the wireless terminal 300 of the modified sound source playback system according to the present invention is schematically shown.

delete

As shown, the wireless terminal 300 of the modified sound source playback system according to the present invention includes a selector 310 for selecting pitch, tone, volume, tempo, and the like, a new SMAF data generator 320, and a sound source playback unit. It consists of 330.

The selector 310 may select a pitch, a tone, a volume, a tempo, and the like of a sound source suitable for a user's taste.

The new SMAF data generation unit 320 generates new SMAF data by using the above-described reference SMAF data and a plurality of analysis data by the selection.

Finally, the sound source reproducing unit 330 loads new SMAF data produced by the SMAF generating unit 123 and reproduces the data as desired by the user.

delete

Referring to Fig. 4, a method for producing a modified sound source according to the present invention is shown in sequence as a flowchart.

As shown, the method for producing a modified sound source according to the present invention includes a MIDI data generation step (S41) for generating reference MIDI data and a pitch change MIDI data, and a feature value extraction step (S42) for extracting characteristic values between the MIDI data. And a MIDI data output step (S43) of outputting a plurality of pitch change MIDI data using the reference MIDI data and the characteristic value, and a SMAF data generation step (S44) of generating reference SMAF data and a plurality of pitch change SMAF data; And an analysis data generation step (S45) of analyzing / extracting characteristic values among the SMAF data, and an SMAF data and analysis data output step (S46) of outputting reference SMAF data and a plurality of analysis data.

First, in the MIDI data generation step (S41), by using MIDI data whose size is minimized so that the wireless terminal can process it, the +5 degree pitch is raised in the MIDI data, for example. Generate and output the changed MIDI data.

Subsequently, in the characteristic value extraction step (S42), the characteristic value is extracted by comparing the reference MIDI data with the changed MIDI data on which the +5 degree pitch is performed. In other words, in the case of MIDI data, the data structure is disclosed, and if the byte position responsible for the pitch of the reference MIDI data is extracted and the value is changed, the MIDI data whose pitch is changed can be obtained. Extracting the position (address) of bytes responsible for such a pitch is called feature value extraction.

Subsequently, in the MIDI data output step S43, a plurality of modified MIDI data, for example, +1 to +12 degrees of pitch up, are output using the reference MIDI data and the characteristic value.

Subsequently, in the SMAF data generating step S44, the reference SMAF data and a plurality of pitch change SMAF data having +1 to +12 degree pitch raising are generated. In this step, not only the pitch-changing SMAF data but also a plurality of pitch-changing SMAF data whose tone, volume (for example, the main track is erased), tempo, and the like are generated together.

Subsequently, in the analysis data generation step S45, analysis data is generated using the reference SMAF data and SMAF data in which a plurality of pitches, tones, volumes, and tempos are changed. Here, the analysis data is pitch analysis data, tone analysis data, volume analysis data, and tempo analysis data.

Finally, in the SMAF data and analysis data output step S46, the reference SMAF data and the pitch, tone, volume, and tempo analysis data are combined into one file and output. The files merged into one file in this way are generally referred to as sound source contents.

Referring to FIG. 5, there is shown a flow chart illustrating in more detail the above-described "analysis data generation step" in the method of producing a modified sound source according to the present invention.

As shown, first, reference SMAF data and a plurality of pitch, tone, volume, and tempo change SMAF data are loaded.

Subsequently, it is compared whether the reference SMAF data and the plurality of pitches, tones, volumes, and tempo change SMAF data have the same size (S52).

Subsequently, when the comparison result data has the same size, the changed portion between the reference SMAF data and the changed SMAF data is collected (S53).

Subsequently, it is determined whether the collected modified parts can be formulated by a predetermined formula. (S54) The formulating judgment determines that the SMAF data is equal to the MIDI data as well as the MIDI data. Will be. In the case of the SMAF data, like the MIDI data, if the +2 degree is changed in the reference sound source, the byte value corresponding to the pitch becomes +2.

Subsequently, when it is possible to formulate a formula as a result of the determination, pitch analysis data is generated using a characteristic formula consisting of a constant formula and a change position. When you create data, the data grows considerably. For example, if the number of notes used in a sound source is 5,000, if the data is created using only a 2-byte address, the data size is 10kByte. To reduce this, the first address value 2 bytes, the displacement amount 1 byte (second address value-first address value), and the displacement amount 1 byte (third address value-second address value) ... This is called the characteristic formula and the change location, and in this way the data can be cut in half.

If it is impossible to formulate, it generates pitch, tone, volume, and tempo analysis data using the change position and the change value. (S56) In other words, if the change data cannot be generated only by the address value as the pitch change data, Create analytical data with the address and change values of the data. Most of these values are located in the header of SMAF data, and include CRC error check values intermingled with AMAF data. Unlike the original function of checking the error occurred during transmission, the seed error check is determined to be located in the middle of the SMAF data in order to prevent the company that made the sound reproducing chip from illegally generating or changing the SMAF. It is recognized as the data of.

In addition, if the size is different as a result of the data size comparison, the difference between the reference SMAF data and the changed SMAF data is analyzed to determine where to delete or insert the data (S57). The difference check program is used to artificially analyze and directly enter the address of the data to be added or deleted. The generation of data through such difference analysis is very rare, and one more series of analyzes are performed using some published programs.

After this determination, pitch, tone, volume, and tempo analysis data are generated as deletion and insertion information of the data.

Referring to FIG. 6A, an example of a chart showing a difference between reference SMAF data and modified SMAF data having the same size is illustrated in FIG. 5, and referring to FIG. 6B, a generation chart of the analysis data is illustrated, and FIG. 6C. Reference is made to one example of a diagram that is the difference between reference SMAF data and modified SMAF data of different sizes.

More specifically, FIG. 6A compares reference SMAF data having the same data size and pitch changed SMAF data having a +1 degree. In addition, circles are portions having different data values, and squares are portions which can be formulated.

As shown in FIG. 6A, when comparing the reference SMAF data and the pitch-changing SMAF data with +1 degree, each byte address is divided into the same part and the other part, and the other part is different from the other part (circle) that cannot be formulated. Section (rectangle, changed to a value of +1 to the reference sound source value). In other words, different parts that cannot be formulated are parts in which data structures are not disclosed, and parts that can be guessed by headers such as musical instruments or playing time, and parts that can be formulated are parts whose values are changed by the amount of pitch displacement. The left part of the left window (8-digit hexadecimal value) is the address of the data. Like this, 13 data of reference SMAF data and + 1 ~ + 12 pitch change SMAF data can be generated.

Next, reference is made to FIG. 6B.

The left end converts the data address to decimal (00000b02h-> 2818), and the reference SMAF data, +1 degree pitch change SMAF data, +2 degree pitch change SMAF data, respectively, to the right. , +12 is the pitch change SMAF data value. In FIG. 6A, since the original part is an unpredictable value, the reference SMAF data is analyzed as 26 (0x1A) and +1 degrees. The SMAF data is analyzed as 100 (0x64). It can be seen that it is predicted. Therefore, two pieces of analysis data are generated, each of which is unpredictable data and predictable data. The format of unpredictable data is data throughput, data address (2 bytes) + constant value.

If only the analysis part of the two data of Figure 6a is generated as data as follows.

Unpredictable data = {0x00, 0x02, <-two circles

0x0B, 0x02, 0x1A, 0x64, <-first circle address (2 bytes) and reference SMAF value, +1 pitch change SMAF value

0x0B, 0x11, 0x06, 0x50}; <-Address of second circle (2 bytes), value of reference SMAF sound source, +1 pitch change SMAF value

Predictable Data = {0x00, 0x08, <-Eight Squares

0x0B, 0x41, <-the first address where the rectangle was found

0x05, <-square second address-first address value

0x05, <-square third address-second address value

0x05, <-… …

0x05,

0x05,

0x05,

0x05};

On the other hand, it has been described above that the playback program is combined with the reference SMAF data and the analysis data into a single sound source content and provided to the wireless terminal. Such a reproducing program reproduces the desired SMAF data, data that cannot be formulated (header portion of the SMAF sound source data), data that can be formulated (part having the pitch value of the SMAF sound source data), and the like by using a predetermined formula. . For example, when the user selects a sound source that is +1 higher than the reference SMAF data, the regeneration program loads the reference SMAF data, replaces it with a value assigned to a designated data address using unformable data, and formulates data. By substituting the calculated amount of change in the data of the data address calculated by using, it is reproduced with the newly changed SMAF data.

Of course, when the user selects the change back to the reference SMAF data, the currently playing SMAF data is the changed SMAF data. Therefore, the non-formal data (header portion of the SMAF sound source data) of the SMAF data is replaced with the value specified at the designated data address. Regenerates the reference SMAF data by substituting the data of the data address calculated using the formulatable data (part having the pitch value of the SMAF sound source data) and calculating the change amount (previously, the change amount is -1 since it is +1). Done.

In this way, the method of making analysis data of the volume and tone and the method of reproducing the sound source are the same as above. However, in the case of volume and tone changes, only the header portion of the SMAF sound source data is changed, so that no predictable data is produced. In this way, a rich sound source can be reproduced by generating respective pitch, volume, and tone change data to recombine and generate a sound source to suit the user's taste.

Next, referring to FIG. 6C, an example of a diagram that is the difference between the reference SMAF data and the modified SMAF data of different sizes is shown. If the size is different, the tempo is usually changed.

Since SMAF data with different tempo (fast) are different in size even with the same song, changing the data at a specific position as above cannot be solved. In this case, the data must be analyzed in more detail by using a published data difference analysis program, and then deleted, added, or changed. Such deleted and added parts are mainly header parts due to the characteristics of SMAF data. When analyzing such data, add / delete analysis function other than the above method is explained.

In FIG. 6C, the left side is reference data and the right side is comparison data. The data in the top two rectangles is to be replaced, the data in the two rectangles below is to be inserted, and the data inside the two rectangles below it is to be deleted.

If you create analytical data based on this,

Change summary data = {0x00, 0x03, <-number of data groups to be replaced, inserted, or deleted

0x00, 0x78, <-base file final size

0x00, 0x76, <-Change file final size

0x00, <-type of change (0: substitution, 1: insert, 2: delete)

0x00, 0x0C, <-starting address of base file to be replaced

0x00, 0x0F, <-end address of base file to be replaced

0x00, 0x00, <-Detail data start address (data to be replaced)

0x00, 0x02, <-Detailed data end address (data to be replaced)

0x01, <-type of change (0: substitution, 1: insert, 2: delete)

0x00, 0x2A, <-address of base file to be inserted

0x00, 0x03, <-Detail data start address (data to be inserted)

0x00, 0x05, <-Detail end address of data (data to be inserted)

0x02, <-type of change (0: substitution, 1: insert, 2: delete)

0x00, 0x00, <-base file start address to be deleted

0x00, 0x02, <-end address of base file to be deleted

0xFF, 0xFF}; <-Temporary address

Change detail data = {0x00, 0x00, 0x00, <-data to be replaced

0xFB, 0x41, 0x53}; <-Data to be inserted

On the other hand, the program for reproducing this is to reproduce the reference SMAF data, change SMAF data, analysis data (that is, change summary data, change detail data) in a predetermined formula at the tempo desired by the user.

For example, a user may select change SMAF data, load reference SMAF data, generate change SMAF data using analysis data (i.e. change summary and change detail data) to reference SMAF data, and use these new change SMAF data Will play.

Referring to Fig. 7, a change sound source reproducing method according to the present invention is shown as a flowchart.

As shown, the modified sound source reproduction method according to the present invention includes a sound source content download step S71, a selection step S72, a new SMAF data generation step S73, and a loading and playback step S74.

First, in the sound source content download step (S71), the sound source content in which reference SMAF data, a plurality of analysis data, and a playback program are integrated is downloaded from the sound source content server to the wireless terminal.

Subsequently, in the selecting step (S72), the user selects and changes at least one of pitch, tone, volume, or tempo of SMAF data (sound source) to be played in the wireless terminal.

Subsequently, in the new SMAF data generation step (S73), new SMAF data is generated using the reference SMAF data and analysis data.

Finally, in the loading and reproducing step (S74), by loading and playing the new SMAF data, the modified sound source reproducing method according to the present invention is completed.

delete

Referring to Fig. 8, a new SMAF data generation method of the modified sound source reproduction method according to the present invention is shown in more detail as a flowchart.

As shown, the new SMAF data generation step first loads reference SMAF data from the sound source content (for example, 0x02, 0xAF, 0x8D, 0x0a, ...) (S81).

Then, for example, when the user selects the pitch 1 degree round, new SMAF data corresponding to the pitch 1 degree round is calculated and replaced in real time. (For example, a value obtained by calculating 0xFF with data of address 0x02) (S82)

Subsequently, it is determined whether the substitution is completed (S83).

As a result of the determination, when the substitution is completed, the changed new SMAF data is loaded and reproduced (S84).

In conclusion, the size of the data file actually applied using the modified sound source reproducing system and the modified sound source manufacturing method for the same will be described below as an example.

Standard SMAF file size: 32,164 Byte (‘Invalid encounter’ by Kim Gun Mo)

Number of sound sources that can be changed: Pitch change from -12 degrees to +12 degrees: 25

Tone change: 4 types

Change the melody track volume: 2 things

Therefore, 58 sound sources are arithmetically needed. Formula: (25 + 4) * 2 = 58

The total size of these sound sources is 1,865,512 bytes, which is about 15 times the maximum size that can be downloaded from the current wireless terminal.

However, the size of the data file to which the present invention described above is applied is as follows.

Reference SMAF Data File Size: 32,166 Byte

Voice Change Analysis Data File Size: 3,603 Byte

Pitch Change Analysis Data File Size: 5,312 Byte

Volume change analysis data file size: 874 Byte

Play program size: 772 Byte

Total size for creating 58 sound effects: 42,736 Byte

Thus, 58 pieces of music can be played using only the original song data (32,166 byte), the analysis data, and the combination module (10,570 byte).

As described above, the modified sound source reproducing system according to the present invention, the modified sound source production method, and the modified sound source reproducing method for example provide a sound source having various pitches, tones, volumes and / or tempos provided by offline karaoke. The user can change this to suit his or her taste, so that one song can be changed to suit his or her taste and can be heard or listened to.

In addition, by this function, for example, by overcoming the quality difference between the offline karaoke and the karaoke of the wireless terminal, it is possible to increase the user's satisfaction, thereby enabling a higher quality service.

In addition, such a function according to the present invention can be applied not only to a karaoke function, but also to a ringtone, a music album, a juke box, and the like, so that the personality of a wireless terminal user can be more variously expressed.

What has been described above is only one embodiment for implementing the modified sound source playback system and the modified sound source production method and the modified sound source playback method according to the present invention, the present invention is not limited to the above-described embodiment, As claimed in the claims, any person having ordinary skill in the art without departing from the gist of the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (11)

Extracting the analysis data which is the difference between the reference SMAF data produced offline and the modified SMAF data changed therefrom, and uploading the reference SMAF data, analysis data and playback program as a single file sound source content and uploading them online. At least one computer; At least one sound source content server which services the sound source contents uploaded from the computer to be downloaded via wired or wireless Internet; And, And at least one or more wireless terminals which download sound source contents from the sound source content server and change the pitch, tone, volume, tempo, etc. in real time and reproduce the new SMAF data. The computer of claim 1, wherein the computer is A MIDI generation / analysis unit for changing the reference MIDI data to the desired pitch and outputting the reference MIDI data and the pitch change MIDI data; And, The reference MIDI data and the pitch change MIDI data outputted from the MIDI generator / analyzer are converted into reference SMAF data and pitch, tone, volume, and tempo change SMAF data, and the reference SMAF data and the changed SMAF data are compared to each other. And an SMAF generation / analysis unit for outputting reference SMAF data, pitch analysis data, tone analysis data, volume analysis data, and tempo analysis data by extracting analysis data that is a difference in tone, volume, and tempo. Sound source playback system. The method of claim 2, wherein the wireless terminal is A selection unit for changing and selecting the pitch, tone, volume, tempo, etc. of the reference SMAF data; A new SMAF data generator for generating new SMAF data using the reference SMAF data and at least one analysis data by the selection; And, And a sound source player for loading and playing new SMAF data from the new SMAF data generator. The method of claim 2, wherein the MIDI generation / analysis unit A MIDI generation module configured to generate and output MIDI data whose pitch is changed from the reference MIDI data when reference MIDI data is input; And, And a MIDI analysis module which compares reference MIDI data with pitch-change MIDI data, extracts characteristic values, and outputs them back to the MIDI generation module. The method of claim 4, wherein the MIDI generation / analysis unit When a characteristic value from the MIDI analysis module is input to the MIDI generation module, a plurality of pitch change MIDI data are produced using the characteristic value, and the SMAF generation / analysis of the reference MIDI data and a plurality of pitch change MIDI data is performed. A modified sound source playback system characterized by outputting negatively. The method of claim 2, wherein the SMAF generation / analysis unit A SMAF generation module for outputting pitch, tone, volume, and tempo change SMAF data using reference SMAF data for reference MIDI data and a plurality of pitch change MIDI data; And, Comparing the reference SMAF data and the pitch, tone, volume, and tempo-changing SMAF data to generate pitch analysis data, tone analysis data, volume analysis data, and tempo analysis data, which are mutually different, and generate the plurality of analysis data and the reference SMAF. A modified sound source playback system comprising: an SMAF analysis module for outputting data. Generating MIDI data whose pitch is changed using reference MIDI data, and outputting the reference MIDI data and the pitch changed MIDI data; A feature value extraction step of analyzing the reference MIDI data and the pitch change MIDI data and extracting feature values that are mutually different values; A final MIDI data output step of generating a plurality of pitch change MIDI data using the characteristic value and outputting the plurality of pitch change MIDI data and reference MIDI data; SMAF data generation step of outputting the pitch, tone, volume, tempo change SMAF data using the reference SMAF data for the reference MIDI data and a plurality of pitch change MIDI data; An analysis data generation step of comparing the reference SMAF data and the pitch, tone, volume, and tempo change SMAF data to generate pitch analysis data, tone analysis data, volume analysis data, and tempo analysis data which are mutually different from each other; And, And a data output step of outputting the reference SMAF data and a plurality of analysis data. The method of claim 7, wherein generating the analysis data When the size between the reference SMAF data and the change SMAF data is the same, Collecting a change portion between the reference SMAF data and the change SMAF data; Generating analysis data with the characteristic formula and the change position if there is a possibility of formalization; And, And if there is no formalization possibility, generating analysis data with the change position and the change value. The method of claim 7, wherein generating the analysis data If the size between the reference SMAF data and the change SMAF data is different, Analyzing differences (deletion, insertion information) between the reference SMAF data and the modified SMAF data; And, The method for producing a modified sound source, characterized in that the step of generating the analysis data with the deletion, insertion information of the difference data. In the modified sound source playback method using a wireless terminal, Downloading a sound source content in which reference SMAF data, a plurality of analysis data, and a reproducing program are integrated from a sound source content server to a wireless terminal; Selecting and changing at least one of pitch, tone, volume, and tempo to be played in the wireless terminal; Generating new SMAF data using the reference SMAF data and analysis data; And, And loading and playing the new SMAF data. 11. The method of claim 10, wherein generating new SMAF data Loading reference SMAF data from the sound source content; Calculating and substituting the reference SMAF data in real time using the analysis data according to a selected pitch, tone, volume, or tempo; And, And generating new SMAF data modified by the calculation and substitution.

Images