JP2002208259A - Music information recording device with recording preventive function of overlap music - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a music information recording device with a recording preventive function of overlap music which is capable of informing a user of the presence or absence of the overlap music without forcing intricate work, such as writing in memoranda, to the user and without exerting a burden to the user in order to inform the user of whether music for DRAW exists in the recorded music or no in recording the music data for DRAW to a recording medium having the recorded music and is capable of preventing recording of the overlap music. SOLUTION: A reproducing device 4 connected to a CPU1 outputs the music data for DRAW to a recording device 2 and is provided with a recording control section 5 for controlling the reproduction thereof, additional recording and the reproduction of the recorded music data. A first memory 6 temporarily stores the data obtained by reproducing the prescribed range of the recorded music data already recorded at the recording medium in a reproducing section 3 and a second memory 7 temporarily stores the music data for DRAW obtained by the reproducing device 4. A comparator section 8 connected to the first memory 6 and the second memory 7 compares the identity of the recorded music data and the music data for DRAW and when the coincidence is specified, this extent is displayed in a display section 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables additional recording music data to be additionally recorded on a recording medium having recorded music data, and prevents recording of music data overlapping with already recorded music data. The present invention relates to a music information recording device having a function of preventing recording of duplicate music.

[0002]

2. Description of the Related Art Song data obtained by reproducing a music CD or the like is recorded on a CD-R, CD-RW, MD, DVD-R, or DVD.
-Recording can be performed on a recording medium including an optical disk such as RW or a semiconductor memory such as a flash memory, and new audio data can be additionally recorded with respect to such recorded music data.

[0003] In recent years, the storage capacity of such a recording medium has been remarkably increased, and a technique for greatly compressing audio information without deteriorating quality has been developed. The number of music data that can be recorded on a medium becomes enormous.

[0004] When the recording medium is MD, about 80
The recording time of one minute was doubled by the advancement of the technology of compressing the audio with almost no deterioration in quality.
A minute recording mode or a quadruple 320 minute recording mode is realized.

Therefore, the number of songs that can be recorded on one MD is
There may be more than 0 songs and sometimes more than 100 songs. When media such as the MP3 standard is used for a medium other than the MD, an enormous number of music pieces can be recorded.

[0006]

A conventional music information recording apparatus, when recording additional music data in a state where it is additionally recorded on a recording medium having recorded music data, is provided after the recorded music data. Since the additional music data is only recorded, the user is likely to overwrite the already recorded music redundantly, especially on a recording medium with a large number of recordable music.

In order to prevent this, it is only necessary to carefully check the title and the like of the music recorded on the recording medium by writing notes, and then record the additional music data, but these are complicated. There are too many burdens to do it completely, and at present it relies on the memory of the user.

It is conceivable to simultaneously record data such as the title of the recorded music data and compare it with data such as the title of the additional music data. In this case, the sound source type of the additional music data is considered. Is limited to special ones such as text-ready CDs, and cannot be a general solution, and the solution is eagerly awaited.

Accordingly, an object of the present invention is to record additional recording music data on a recording medium having recorded music data, and to determine whether or not the additional recording music is in the recorded music, by writing a memo or the like. A song information recording device with a duplication song recording prevention function that can notify the presence or absence of duplicate songs without imposing burdens on the user without forcing the user to perform complicated tasks. To provide.

[0010]

In order to solve the above-mentioned problems, a music information recording apparatus having a function of preventing duplicate music recording according to the present invention employs the following characteristic configuration.

(1) In a music information recording apparatus capable of additionally recording additional music data on a recording medium having recorded music data, a recording obtained by reproducing a predetermined range of the recorded music data on the reproduction medium. First to temporarily store completed song data
A memory, a second memory for temporarily storing additional music data obtained by extracting a predetermined range of the additional music data, and recorded music data stored in each of the first and second memories And a comparing unit that compares the identity of the additional music data, and when the recorded music data and the additional music data are determined to match by the comparing unit, the additional music data is stored in the recording medium. A song information recording device having a function of preventing duplicate song recording, comprising a display unit for displaying that the song has already been recorded.

(2) In a music information recording device capable of additionally recording additional music data on a recording medium having recorded music data, a recording obtained by reproducing a predetermined range of the recorded music data on the reproduction medium. First to temporarily store completed song data
A memory, a second memory for temporarily storing additional music data obtained by extracting a predetermined range of the additional music data, and recorded music data stored in each of the first and second memories And a comparing unit that compares the identity of the additional music data, and when the recorded music data and the additional music data are determined to match by the comparing unit, the additional music data is stored in the recording medium. A song information recording device with a function of preventing duplicate song recording, comprising: a recording control unit that controls so as to prohibit recording of the additional recording song data on the recording medium when already recorded.

(3) The comparing section of (1) or (2) corrects a gain component in an amplitude direction of the recorded music data and the additional music data to correct the recorded music data and the additional recording music data. A song information recording device with a function to prevent duplicate song recording, which is configured to compare the identity of song data.

(4) The comparing section (1) or (2) corrects the phase shift in the time axis direction between the recorded music data and the additional music data to correct the recorded music data and the additional recording. A song information recording device having a function of preventing duplicate song recording, which is configured to compare the identity of song data.

(5) The comparing section of (1) or (2) excludes the predetermined range of the polarity reversal part of the recorded music data as a noise component and stores the recorded music data and the additional recording music data. A music information recording device with a function of preventing duplicate music from being recorded, wherein the music information recording device is configured to compare the identities of songs.

(6) The comparison unit according to any one of (1) to (5), wherein the polarity reversal point information of the recorded music data and the additional music data is used as time information for the recorded music data. And a song information recording device with a function of preventing duplicate song recording, which is configured to compare the identity of additional song data.

(7) The recording control unit according to any one of (2) to (6) arbitrarily selects the operation / non-operation of control for inhibiting the recording of the post-recording music data on the recording medium. A song information recording device having a function of preventing recording of duplicate songs, including a selection unit for obtaining the song information.

(8) A music information recording device having a function of preventing duplicate music from being recorded, wherein the recording medium according to any one of the above (1) to (7) is constituted by a disk of optical, magnetic or the like or a semiconductor memory.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. In this embodiment, the present invention is applied to a music information recording apparatus in which a recording medium having recorded music data is an MD, and additional music data for additional recording is data obtained by reproducing a music CD. ,
The entire circuit is configured as shown in FIG. 1, and is provided with a CPU 1 for controlling the entire music information recording apparatus in a complex manner.

The recording device 2 which is controlled by the CPU 1 in an integrated manner is for additionally recording on the MD on which the recorded music data is recorded, and includes a reproducing unit 3 for reproducing the recorded music data. It is comprised including.

The reproducing apparatus 4 which is controlled by the CPU 1 in an integrated manner outputs the additional recording music data to the recording apparatus 2 as the additional recording music data S. A recording control unit 5 for controlling the reproduction of the recorded music data is provided.

The first memory 6 connected to the recording device 2
A second memory 7 for temporarily storing recorded music data obtained by reproducing the predetermined range of the recorded music data already recorded on the recording medium by the reproducing unit 3, and connected to the reproducing device 4. Is to temporarily store additional music data obtained by extracting a predetermined range of the additional music data obtained by the reproducing apparatus 4.

The comparing section 8 connected to each of the first memory 6 and the second memory 7 stores the recorded music data stored in the first memory 6 and the additional music data stored in the second memory 7. When the comparison unit 8 determines that the recorded music data and the additional music data match, the display unit indicates that the additional music data has already been recorded on the recording medium. 9 is displayed.

As shown in FIG. 2, the basic operation is to additionally record additional music data obtained by reproducing a disk P such as a music CD on a disk D on which recorded music data is recorded, as schematically shown in FIG. At the same time, the data obtained by reproducing the disk D is stored in the first memory 6 (M1), and at the same time, the additional music data for reproducing the disk P is stored in the second memory 7 (M2). Is started to determine whether or not there is an overlapping portion in the memory (C). If there is an overlapping portion, a display "duplicate but do you want to record?" (Q), and if they do not overlap, recording is normally started (R).

Returning to FIG. 1, the output from the reproducing apparatus 4 or the reproducing section 3 is an input signal a1 of an analog signal corresponding to audio information as shown in FIG. It is difficult to compare the identity of the recorded music data with the music data for additional recording in such an analog signal state because it swings in the + direction and the-direction from the polarity inversion point. Instead of digitally comparing.

That is, the position where the input signal a1 changes in the + direction from the zero point as a boundary is an upward arrow, and the position where the input signal a1 changes in the-direction is a downward arrow. Time points t1, t2... T (n−
1), a time signal c1 as a pulse signal rising at tn
And the elapsed time data from the reference time point t0 is used as the data of the time signal c1 corresponding to the input signal a1. The comparing unit 8 is configured to compare the identity of the recorded music data with the additional music data using the time signal c1.

As shown in FIG. 4, when the input signal a1 corresponding to the recorded music data is compared with the input signal a2 corresponding to the additional music data, the recording level (in the amplitude direction) at the time of recording by the recording device 2 is compared. In many cases, the level of the additional music data differs from the level of the post-record music data, and this correction is required.

That is, in this correction, the time signal c1 corresponding to the input signal a1 of the recorded music data is extracted as described with reference to FIG. 3 to obtain the time signal c1. The time signal c2 corresponding to the input signal a2 is extracted, and the polarity inversion of the two signals c1 and c2 (t1, t2
By comparing t (n-1) and tn) as data obtained as the elapsed time from the reference time point t0, it is possible to determine the identity of the two.

In other words, even if the respective gain components of the input signals a1 and a2 in the amplitude direction are different, the time when the input signals a1 and a2 swing in the + and-directions from the polarity reversal point at the point 0 (ground point) is changed. Input signal a1 and input signal a2
Can be accurately determined whether or not are the same sound source.

On the other hand, when the recorded music data and the additional music data are compared, it is rare that the phases of the recorded music data and the additional music data completely coincide with each other. There is a time delay.

In order to correct the delay and perform an accurate comparison, as shown in FIG. 5, the input signal a1 of the recorded music data is used.
And a time signal c3 corresponding to the input signal a3 are extracted as described with reference to FIG. 3, and at the same time, the polarity inversion points (t1, t2) of both signals c1, c3 are extracted.
2... T (n−1), tn) can be compared as data obtained as the elapsed time from the reference time point t0 to obtain the delay time td of both, based on this, the recorded music It is possible to accurately determine the identity between the data and the additional music data.

.., T (n−n) at the polarity inversion point of the input signal a4 as shown in FIG.
1) When extracting a time signal (not shown) as a pulse signal rising at tn, a noise component d is present in the vicinity of the starting point swinging in the + and-directions from the polarity reversal point at the point 0 (ground point). , There is an adverse effect due to this noise component.

In order to eliminate this adverse effect, polarity inversion is detected at each of the upper and lower limits of the noise component d, and the intermediate position obtained at each of the upper and lower limits is determined by the polarity inversion in the time signal. Time point (t1, t2
.. T (n-1), tn), and the influence of the residual noise component is eliminated by replacing the time point with the elapsed time from the reference time point t0 as a time signal.

FIG. 7 is a schematic diagram showing how the comparison between the recorded music data and the additional music data performed by the comparing section 8 under the various measures described above is basically performed. Next, operation steps e1 to e10
Listed as

In the figure, DREC is additional music data composed of blocks 1 to 8, DEND is the last track data of the recorded music data, and D (END-1) is one track before the last track. Dmin is the minimum (first) track data, and DEND, D (END-1)... Dmi
Each of n is also composed of 1 to 8 blocks. Data indicated at a plurality of locations as reference numerals (* 1) to (* 4) means that each is the same data.

(Step e1) The comparison of the first data of the additional music data DREC is started from the first data of the minimum track data Dmin.

(Step e2) Minimum track data Dmi
The comparison is performed on the second data of n, and the comparison is sequentially performed up to the last track data DEND to search for a data block having the same data.

(Step e3) In this example, since there is no data in the recorded music data that matches the first data of the additional music data, the next data, that is, the additional music data DREC
Starts comparison from the second data.

(Step e4) Since data corresponding to the second data of the additional music data DREC is present in the minimum track data Dmin, the comparison is started again from the head data of the next track data.

(Step e5) Track data D (END-
Since there is data matching 1), comparison of the next data is started again.

(Step e6) Since the data do not match as a result of the comparison, the data is returned to the original data and the comparison is started again.

(Step e7) Since the data matches again as data (* 1), the next data is compared.

(Step e8) Since the second data also matches as data (* 2), it is compared with the following data by the same number (in this example, the third and fifth data are compared).

(Step e9) Since the third data also matches as data (* 3), it is compared with the fifth data.

(Step e10) The fifth data is also (*
4), it is determined that the recorded music data and the additional music data are the same.

Now, the comparison operation thus performed will be described in more detail. As shown in the flowchart of FIG. 8, first, in step S1, a writable write-once optical disc (MD) is set in the reproducing unit 3 of the recording device 2, and in the next step S2, "blank disc?" In this case, the process proceeds to step S3 to execute the process 1 on the recorded music data of the MD.

This processing 1 prevents the uncertain determination from being made by the residual noise component near the point 0 described with reference to FIG. 6. The specific procedure is as shown in the flowchart of FIG. When the processing 1 is started, first,
In step S15, the time (for example, 10 seconds) to be stored is set, and the count number corresponding to the sampling frequency of the digital recording of the MD is set.

In step S16, it is determined whether or not the relationship "X <ABS" is established between the range X in which noise is not known and the absolute value ABS of the actually obtained data. Is re-executed, and when the result is No, the process proceeds to step S17, where the polarity of the input signal is Low? Is determined, and in the case of Yes, the flow proceeds to step S18 to measure the Low time, that is, when the count value is +
The process proceeds to step S19.

In step S19, the count value of the timer is set to TimeUp? In the case of No, the process proceeds to step S20, and has the next data been entered? Is re-executed in the case of No, and when the result is Yes, the process proceeds to step S21, where the count value of the timer is -1.
Then, the process proceeds to step S22. This step S22 is
If the determination is "X <ABS" and the result is Yes, the process proceeds to step S23.

In the step S23, the input signal Hi? In the case of Yes, the process proceeds to step S24, and the Hi time is measured, that is, the count value is incremented by 1, and the process proceeds to step S25. In the case of No in step S17, in other words, also in the case of Hi, the process proceeds to step S24 to measure the time of Hi.

In step S25, is the timer time up? Is determined, and in the case of Yes, step S2
9, the data is stored in the memory, and the series of operations of process 1 is completed. If No in step S25, the process proceeds to next step S26, where it is determined whether or not the next data has entered. In the case of No, the process is re-executed and when the result is Yes, the process proceeds to step S27, where the timer is counted down by −1,
At the next step S28, "X <ABS" is determined. If No, the process returns to the above-described step S24. If Yes, the process returns to the step S17 and the subsequent steps are executed again.

When the answer is Yes in step S19, the process proceeds to step S29, where the data is stored in the memory, and the series of operations of process 1 is completed.

By the way, if the processing 1 described so far is executed in the step S3 shown in FIG. 8, the process proceeds to the next step S4, and is the key for starting the recording pressed? Is determined, and if No, the processing is re-executed. When the determination is Yes, the process proceeds to step S5 to start recording, and proceeds to the next step S6, where the above-described process 1 is executed only for a newly recorded song. After that, the process proceeds to step S7 to execute process 2.

Next, the details of the process 2 will be described with reference to FIGS.
This will be described with reference to the flowcharts shown in FIGS. Note that reference numerals (1) to (4) shown in the drawings are relay points attached for the sake of drawing convenience.

First, in step S30 of the flow chart shown in FIG. 10, the head of the newly-recorded music data to be newly recorded and the minimum track No. of the already-recorded music data are recorded.
Then, the process proceeds to the next step S31, where the two are compared with each other. If yes, the process proceeds to the next step S32, where the final data of the song to be newly recorded as the post-recording song data? Is determined, Y
In the case of es, the process proceeds to step S33, and since the music is not the same, normal recording is started, and the process 2 is completed.

On the other hand, if No in step S32, the flow advances to step S34 to proceed to step S34, where the last track No. already recorded as recorded music data is recorded. (Final data)? In the case of Yes, the comparison is started from the data following the data for which the data to be recorded was compared in the next step S35, and the process returns to the above-described step S31 to determine the coincidence between the two. You.

On the other hand, if No in step S34,
Proceeding to step S36, the track No. which has already been recorded as recorded music data. Is the data collected? Is determined, and when the determination is Yes, the process proceeds to step S37, and the next track No. is determined. Starts from the first data of
Returning to step S31, a determination is made as to whether the two match.

If No in step S36, the flow advances to step S38 to compare the next data that has been matched with the next data of the tune to be recorded since the two data match, and the flow advances to step S39. Did they match? Is determined, and in the case of No, step S40
After the data to be compared is returned to the matched data, the comparison is started again from the next data after the matched data of the recorded song, and then the process returns to the above-described step S31, and the determination of the matching between the two is made. Done.

Now, in the case of No at step S31,
The process proceeds to the step S41 of the flowchart shown in FIG. 11 via the relay point (3), and is the final data of the music to be newly recorded as the additional music data? Is determined, and in the case of Yes, the process proceeds to step S42, where the recorded last track No. Is it the final data? Is determined, Yes
In the case of, the process proceeds to step S43, and since the songs are not the same, normal recording is started and the process 2 is completed.

On the other hand, if No in step S41, the flow advances to step S44 to record the last track N
o. Is it the final data? Is determined, and in the case of Yes, the process proceeds to step S45, where the next data of the newly recorded tune and the minimum track N that has been recorded are compared.
o. Start comparison from the beginning of.

If No in step S44, the flow advances to step S46 to record the track No. The final data of? Is determined, and in the case of Yes, the process proceeds to step S47 and the next track No. The comparison starts from the beginning of.

In the case of No at step S42,
Proceeding to step S48, the recorded track No.
The final data of? Is determined, and in the case of Yes,
Proceeding to step S49, the next track No. The comparison starts from the beginning of.

Then, in the case of No in step S46, the case in which step S45 or step S47 is completed, the case of No in step S48, and the case in which step S49 is completed, the process is performed via the relay point (2). 10
The process returns to step S31 of the flowchart shown in FIG.

If No in step S39, the flow advances to step S50 in the flowchart shown in FIG. 12 via the relay point (1), and is the final data of a music piece to be newly recorded as additional music piece data? Is determined, and in the case of Yes, the process proceeds to step S51, and since there is only two matching data, it cannot be regarded as the same song, so that the recording is normally performed and the process 2 is completed.

In the case of No at step S50, the process proceeds to step S52, where the last track No. which has already been recorded as recorded music data. (Final data)? Is determined, if Yes, step S51 is executed to complete the processing 2, and if step S52 is No, the process proceeds to step S53, where the track No. which has already been recorded as the recorded music data. The final data of? Is determined, and in the case of Yes, the process proceeds to step S54 to return to the data corresponding to the music to be recorded, and the data following the data corresponding to the recorded music is compared, and the relay point (2) is performed. Then, the process returns to step S31 of the flowchart shown in FIG. 10, and the subsequent steps are executed.

In the case of No at step S53,
Proceeding to step S55 in the flowchart shown in FIG. 13 via the relay point (4), the data to be recorded and the data being recorded are compared at the same interval, and some data are compared. Did they match? Is determined, and in the case of No, the process proceeds to step S57, where the track No. already recorded as the recorded music data is recorded. The final data of? Is determined, and in the case of No, the process proceeds to step S58, and comparison is performed from the data following the recorded data that matches the data on the recording side that matches the first time.

On the other hand, if Yes in step S57, the flow advances to step S59 to compare the next data after the first matching data with the head of the recorded data.

This step S59 or step S58
Is completed, the process returns to step S31 of the flowchart shown in FIG. 10 via the relay point (2), and the subsequent steps are executed again. If Yes in step S56, the process proceeds to step S60 to repeat the same song. Since it can be considered, save the number of songs and the number of songs in the memory,
Processing 2 ends.

When the processing 2 executed as described above is completed, the process returns to FIG. 8, and the process proceeds to step S8. Is determined, and in the case of No, this is re-executed. When the determination is Yes, step S9 is performed.
Did you finish all recordings? Is determined, and Y is determined.
If yes, proceed to step S10 to determine if there is a duplicate song. Is determined.

If the determination in step S9 is No, the flow advances to step S12 to add the frequency data (time signal) of the recorded song and the newly added song to the end of the recorded data. The next recording is started in the next step S13, the above-mentioned process 2 (step S7) is executed again, and the subsequent steps are executed again.

In the case of Yes in step S2,
Proceeding to step S14, normal recording is started.

A series of operations is completed when Step S10 is No, when Step S11 is completed, or when Step S14 is completed.

[0073]

As is apparent from the above description, the music information recording apparatus with the function of preventing the recording of 111 overlapping music pieces according to the present invention can be used in a state where additional music pieces are added to a recording medium having recorded music piece data. When recording data, even if a recording medium having a huge storage capacity is used, the song data for additional recording is checked after carefully checking the title and the like of the song recorded on the recording medium by memo writing or the like. There is an effect that the burden of recording does not impose an excessive burden on the user.

The above-described effects can be obtained even if the sound source type of the additional music data is not a special type such as a text CD.

Therefore, according to the present invention, when recording additional music data on a recording medium having recorded music data, it is determined whether or not the additional music is included in the recorded music by making a memo or the like. A song information recording device with a duplication song recording prevention function that can notify the presence or absence of duplicate songs without imposing burdens on the user without forcing the user to perform complicated tasks. Can be provided.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing an entire circuit of a music information recording apparatus having a function of preventing duplicate music from being recorded according to an embodiment of the present invention.

FIG. 2 is a schematic diagram conceptually showing a basic operation of the music information recording device shown in FIG.

FIG. 3 is a waveform chart for explaining an operation principle of converting signal data of a comparison unit used in the present invention into a time signal.

FIG. 4 is a waveform chart for explaining the principle of the operation of correcting a difference in gain in the amplitude direction that occurs when comparing signal data of a comparison unit used in the present invention.

FIG. 5 is a waveform chart for explaining the principle of the operation of correcting a phase difference occurring when comparing signal data of a comparison unit used in the present invention.

FIG. 6 is a waveform chart for explaining the principle of an operation of removing a residual noise component generated in signal data of a comparison unit used in the present invention.

FIG. 7 is a schematic diagram for explaining the principle of the data comparison operation of the comparison unit used in the present invention.

FIG. 8 is a flowchart showing operation steps of a comparison unit used in the present invention.

FIG. 9 is a flowchart showing a detailed operation of processing 1 shown in FIG. 8;

FIG. 10 is a flowchart showing a first part when the detailed operation of the processing 2 shown in FIG. 8 is divided into first to fourth parts.

FIG. 11 is a flowchart showing a second part when the detailed operation of the processing 2 shown in FIG. 8 is divided into four parts.

FIG. 12 is a flowchart showing a third part when the detailed operation of the processing 2 shown in FIG. 8 is divided into four parts.

FIG. 13 is a flowchart showing a fourth part when the detailed operation of the processing 2 shown in FIG. 8 is divided into four parts.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 CPU 2 recording device 3 reproducing unit 4 reproducing device 5 recording control unit 6 first memory 7 second memory 8 comparing unit 9 display unit

Claims (8)

[Claims] 1. A music information recording apparatus capable of additionally recording additional music data on a recording medium having recorded music data, wherein a recorded area obtained by reproducing a predetermined range of the recorded music data on the reproduction medium is provided. A first memory for temporarily storing music data, a second memory for temporarily storing additional music data obtained by extracting a predetermined range of the additional music data, and the first and second memories A comparison unit that compares the identity of the recorded music data and the additional music data stored in each of the above, and when it is determined that the recorded music data and the additional music data match by the comparison unit, A music information recording device with a function of preventing duplicate music from being recorded, further comprising a display unit for displaying that the additional music data is already recorded on the recording medium. 2. A music information recording apparatus capable of additionally recording additional music data on a recording medium having recorded music data, wherein the recorded music data is obtained by reproducing a predetermined range of the recorded music data on the reproduction medium. A first memory for temporarily storing music data, a second memory for temporarily storing additional music data obtained by extracting a predetermined range of the additional music data, and the first and second memories A comparison unit that compares the identity of the recorded music data and the additional music data stored in each of the above, and when it is determined that the recorded music data and the additional music data match by the comparison unit, When the additional music data is already recorded on the recording medium,
And a recording control unit for controlling the recording of the additional recording music data on the recording medium so as to be prohibited. 3. The comparison section corrects a gain component in an amplitude direction between the recorded music data and the additional music data to compare the recorded music data with the additional music data for identity. 3. The music information recording device having a function of preventing duplicate music from being recorded according to claim 1 or 2, wherein 4. The comparison section corrects a phase shift between the recorded music data and the additional music data in the time axis direction and compares the recorded music data with the additional music data for identity. 3. The method according to claim 1, wherein
A music information recording device with a function of preventing duplicate music from being recorded as described in 1. 5. The comparison section is configured to compare the identity of the recorded music data with the additional music data by excluding a predetermined range of the polarity reversal part of the recorded music data as a noise component. 3. The music information recording device with a function of preventing duplicate music from being recorded according to claim 1 or 2. 6. The comparing section compares the recorded music data and the additional music data with the polarity reversal point information of each of the recorded music data and the additional music data as time information. 4. The method according to claim 3, wherein
6. A music information recording device with a function of preventing duplication of music according to claim 5. 7. The recording control section includes a selection section which can arbitrarily select operation / non-operation of control for prohibiting recording of the additional music data on the recording medium. A music information recording device with a function of preventing duplicate music from being recorded according to any one of claims 2 to 6. 8. A music piece having a function of preventing duplication of a piece of music according to claim 1, wherein said recording medium comprises a disk such as optical or magnetic or a semiconductor memory. Information recording device.