JP2001176252A - Method and device for reproducing disk and recording medium for recording the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the number of the finally recorded musical piece recognizable in an early stage by suppressing the probability of searching a nonexisting musical piece by performing the random reproduction of a partial disk by means of a CD player. SOLUTION: In a disk reproducing method, a prescribed musical piece extent (area) is set by subdividing the number of recorded musical pieces permissible to a disk and the random selection and reproduction of the musical pieces in the extent are performed by means of a musical piece extent setting section 711 and a random number generating section 712 both of which constitute a random reproduction control section 71 and the random selection and reproduction of musical pieces existing in the extent are repeated while the area is successively shifted by means of a musical piece extent setting and switching section 713. When a musical piece is not searched, all musical pieces the numbers of which are smaller than that of the nonexisting musical piece are randomly reproduced. Alternatively, the control section 71 considers that all recorded musical pieces exist in the prescribed range and repeats the random selection and reproduction of the musical pieces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for random reproduction of a partial disk before finalization.
The present invention relates to a disk reproducing method, a reproducing apparatus, and a recording medium on which the method is recorded.

[0002]

2. Description of the Related Art CD-Rs (Recordable) have been widely used as tools for developing software for music, photos, data, and games. CD-R is a CD-R that has a so-called write-once function that can be written only once.
It is compatible with both DA / CD-ROM.

[0003] By the way, a partial CD-R refers to a disc before finalization. That is, the information is recorded in the program area, but the lead-in area and the lead-out area are not recorded except for the room for additional recording. In the lead-in area, TOC (Tabl
Index information called "e Of Contents" is recorded, and the total recording information pieces (for example, the total number of songs) and the total recording time (for example, the total playing time) recorded in the program area of the disc are recorded as subcodes. In the program area, music information and the like as a main code are recorded.
The channel Q data of the subcode includes a track number (TNO) indicating a recording information piece number (for example, a song number), a recording time (P-TIME: for example, the playing time of the song) from the start of the track, and TNO = 1. The measured total recording time (A-TIME: for example, the total playing time of the song) and the like are recorded. In the lead-out area, a lead-out code indicating the area is recorded.

[0004] In the partial CD-R, a PMA (Program Memory Area) is provided on the inner periphery of the lead-in area as a temporary TOC area for storing a recording history. In the PMA, information similar to the TOC recorded in the lead-in area, such as the start address and end address of the recording information recorded in the program area, is recorded.

Conventionally, when reproducing a partial CD-R in a CD-R recorder, the pickup can be moved to a PMA area (temporary TOC). The number of recorded songs can be obtained by referring to the contents, and no particular problem occurs. However, if the CD player attempts to reproduce the partial CD-R, the CD player can only pick up the lead-in area and cannot access the PMA on the inner circumference. Therefore, only normal reproduction is allowed, and random reproduction and program reproduction do not function. This is T
This is because the OC does not exist, and it is difficult for the player to perform non-sequential control because the number and length of songs recorded on the disc are unknown. Therefore, only normal reproduction which sequentially reproduces from the beginning of the program area is permitted.

[0006]

As described above, in the conventional ordinary CD player, only normal reproduction of a partial CD is permitted, and random reproduction and program reproduction do not function. Therefore, there is a drawback that the playback function of the partial disk is limited until finalization is performed.

The present invention has been made in view of the above circumstances, and subdivides the number of recorded songs allowed on a disc, sets a predetermined song range (area), and performs random song selection and reproduction within that range. Random playback on a partial disk by repeating random selection and playback within that range while sequentially shifting the area, or by repeating random selection and playback within that range for all recorded songs To provide a disk reproducing method, a reproducing apparatus thereof, and a recording medium on which the method can be recorded, in which the probability of searching for a non-existent music is suppressed and the last recorded music number can be recognized earlier. With the goal.

[0008] Further, by setting the number of songs to be shifted smaller than the number of area songs and repeating random song selection reproduction within the range, a disk reproduction method and a reproduction apparatus and a reproduction apparatus thereof that can give the user a more random feeling. Another object is to provide a recording medium on which the method is recorded.

[0009]

According to a first aspect of the present invention, there is provided a disk reproducing method for reproducing music recorded on a disk, wherein the method comprises the steps of: A first setting step of setting a predetermined music range including a plurality of music pieces, a reproduction step of randomly selecting music from the set predetermined music range, and reproducing the selected music piece; And a second setting step of setting a new predetermined music range including a music number larger than the largest music number within the predetermined music range. The step and the second setting step are repeated.

According to a second aspect of the present invention, in the disk reproducing method according to the first aspect, the predetermined music range to be set includes a music within the predetermined music range which was previously selected. Not included.

Further, according to a third aspect of the present invention, in the disk reproducing method according to the first aspect, the predetermined music range to be set is a music within a predetermined music range which was previously selected. I decided to include it. Also, in the disc reproducing method according to claim 4, in the method according to claim 3, when it is confirmed that the selected tune is a non-existent tune not recorded on the disc, Thereafter, a song having a song number smaller than the non-existing song is selected at random, and the selected song is reproduced.

A disk reproducing method according to a fifth aspect of the present invention is a disk reproducing method for reproducing music recorded on a partial disk, wherein a selecting step of randomly selecting a music recorded on the partial disk; Playing back the song selected in the step, and when it is confirmed that the selected song is a non-existent song that is not recorded on the disc, thereafter, from the non-existent song A random selection is made for a song having a small song number, and the selected song is reproduced.

According to a sixth aspect of the present invention, there is provided a disk reproducing apparatus for reproducing music recorded on a disk, comprising: setting means for setting a predetermined music range including a plurality of music; Selecting means for randomly selecting a song from the music range of the above, and reproducing means for reproducing the music selected by the selecting means, wherein the setting means sets the predetermined music range in the predetermined music range. A predetermined music range including a music number larger than the largest music number in the music range is set.

According to a seventh aspect of the present invention, in the disk reproducing apparatus according to the sixth aspect, the setting means sets the music within a predetermined music range previously set in the setting of the predetermined music range. Was set so as not to include. Further, in the disk reproducing apparatus according to the eighth aspect, in the apparatus according to the sixth aspect, the setting unit sets the predetermined music range so as to include the music within the predetermined music range set last time. It was decided to.

According to a ninth aspect of the present invention, in the disk reproducing apparatus according to the sixth to eighth aspects, it is confirmed that the selected tune is a non-existent tune not recorded on the disc. In this case, the selecting means randomly selects a song having a song number smaller than the non-existing song.

According to a tenth aspect of the present invention, there is provided a disk reproducing apparatus comprising:
A disk reproducing apparatus for reproducing a song recorded on a partial disk, comprising: a selecting unit for selecting a song recorded on the partial disk; and a reproducing unit for reproducing a song selected by the selecting unit. When it is confirmed that the selected song is a non-existent song that is not recorded on the partial disc, the selecting means randomly selects a song with a song number smaller than the non-existent song. It was decided to.

[0017] A recording medium recording the computer program according to claim 11 is a recording medium recording a computer program for reproducing music recorded on a disk, wherein the computer program stores a random music selection program in a computer. A predetermined song range including a plurality of songs is set as a target, and a selected song is randomly selected from the set predetermined song range, and the selected song is reproduced by the reproducing means. A new predetermined music range including a music number larger than the largest music number within the predetermined music range is set.

Thus, the number of recorded music pieces allowed on the disc is subdivided, a predetermined music piece area (area) is set, random music selection reproduction is performed within the area, and the area is sequentially shifted in ascending order while the selected music piece is reproduced. By repeating random song selection and reproduction within the range, or by setting all of the recorded songs to a predetermined song range and repeating random song selection and reproduction within the range, partial discs such as CD-R, CD-RW, etc. , Random playback is possible, the probability of searching for a non-existent music is kept low, and the last recorded music number can be recognized earlier.

Further, by setting the number of pieces of music to be shifted to be smaller than the number of area pieces of music and repeating random selection and reproduction within that range, the user can be given a more random feeling.

[0020]

FIG. 1 is a block diagram showing the basic configuration of a disk reproducing apparatus to which the present invention is applied. In the CD player 100, the CD or CD-
An R disk, or a CD-R or CD-RW disk (hereinafter, referred to as a partial disk) before finalization, which is an object of the present invention, is mounted on a turntable (not shown). The spindle motor 2 rotationally drives the partial disk 1 based on a spindle servo control signal (S _SC ) from the servo unit 3. Pickup 4
Read and play recorded music data on partial disk 1
An R signal (S _RF ) is output to the preamplifier 5, which amplifies the reproduced RF signal (S _RF ), outputs the amplified signal to the decoder 6, and converts the reproduced RF signal (S _RF ) into an error signal (S _ER). ) Is generated and output to the servo unit 3.

The first servo section 3A of the servo section 3 generates a tracking error signal (S _TE ) and a focusing error signal (S _FE ) from the error signal (S _ER ) and the control signal (S _CON ) from the system controller 7. Then, a tracking servo and a focusing servo in the pickup 4 are performed. 1st servo 3A
_Are the control signal (S _CON ) from the system controller 7 and the error signal (S
Carriage servo for driving the carriage 8 is performed based on _ER ). A home position detection switch 9 for detecting the home position of the carriage 8 is provided near the carriage 8, and outputs a home position detection signal (S _HM ) to the system controller 7.

The audio data decoding unit 6A of the decoder unit 6 converts the input reproduced RF signal (S _RE ) into a binary signal, separates a frame synchronization pattern, and converts the signal into an EFM (Ei).
ghtto Fourteen Modulation) demodulates, performs signal processing such as error correction, and outputs audio data (D _AD ) to the D / A converter unit 10. Also, it outputs to the control data section 6B included in the subcoding. The control data decoder 6B outputs the control data (D
_CN ) and outputs it to the system controller 7. At the same time, the decoding unit 6 generates a spindle servo error signal (S _SE ) from the input reproduced RF signal (S _RF ) and outputs it to the second servo unit 3B. Second servo unit 3
B functions as a spindle servo unit, and a spindle servo error signal (S _SE ) and a control signal (S _SE ).
Based on _CON ), a spindle servo control signal (S _SC ) is output to the spindle motor 2 to rotate the spindle motor 2 at a predetermined rotation speed.

The DA converter section 10 performs D / A conversion of the input audio data (D _AD ) and outputs it as an audio output signal (S _OUT ). The system controller 7 controls the control data (D _CN ) and the display operation unit 11
Based on the operation control signal input from the CPU, the entire CD player 100 is controlled and a memory 7A for storing various program data is provided. Details of the system controller 7 including the memory 7A will be described later. The display operation unit 11 includes a display unit (not shown) for transmitting various information to the user, and performs various displays under the control of the system controller 7.

FIG. 2 is a functional block diagram showing only the parts related to the present invention extracted from the functions of the system controller 7 shown in FIG. Specifically, the function is realized by reading and executing a program recorded in the memory 7A. The disc reproducing apparatus according to the present invention is roughly divided into a random reproduction control section 71 and a random reproduction output section 72 in terms of functions.

As will be described later, the random reproduction control section 71 subdivides the number of pieces of recorded music permitted on the partial disk, sets a predetermined music range (area), and performs random music selection reproduction within that range. Random playback on a partial disk is performed by repeating random selection and playback within that range while sequentially shifting the area, or by repeating random selection and playback within that range for all recorded songs. Forgive. The random reproduction output section 72 is a section for controlling various blocks shown in FIG. 1 by a control signal generated by the random reproduction control section 71.

The random reproduction control unit 71 includes a music range setting unit 711 for setting a predetermined music range, a random number generation unit 712 for generating random numbers for performing random music selection reproduction within the set music range, and a music range. In order to repeat the setting of a predetermined range by the setting unit 711 and the generation of random numbers within the range by the random number generation unit 712, the control unit includes a music range setting / switching unit 713 that sequentially shifts the set music range.

FIG. 3 is a diagram cited for explaining the operation of the embodiment of the present invention, and is an operation conceptual diagram showing the operation on a time axis. FIG. 3 (a) shows a case where a predetermined section (area) is set, random reproduction is performed in the area, and if the search is successful, the area is sequentially shifted to a higher one and random reproduction is performed in the range. This shows a method of minimizing the probability of occurrence of a search failure by performing the search. In this case, a random feeling is maintained by selecting randomly within the area, but within the area.

Specifically, first, area 1 (1 to 10 songs)
Randomly select a song and play it. When this reproduction is completed, next, the music is randomly selected and reproduced in the area 2 (11 music pieces to 20 music pieces). This is repeated by sequentially shifting the area. Double search confirmation (Search target song,
If the song is not found, perform a similar search again,
If the target song is not found again, it is determined that the search has failed), and the non-existent song number, for example, “25” is confirmed (hereinafter referred to as “missing”). Recognize that it does not exist. Therefore, "24" which is the music number-1 is set as the virtual maximum music n, the area search is ended here, and the random music selection reproduction in the n music is repeated. Even if there are n songs, when the missed song is generated, the missed song-1 is replaced with a new n, and the process is repeated until the reproduction of all the songs is completed.

By the way, in the above-mentioned method, since the preceding and following areas do not overlap when the areas are shifted, the music numbers to be randomly selected are always in ascending order. On the other hand, in order to emphasize the sense of randomness, the method shown in FIG. 3B shows that the selected songs may be reversed in ascending order.
In (b), the number of pieces of music to be shifted is made smaller than the number of area pieces of music, thereby giving the possibility of music selection falling. That is,
The number of songs in the area is 10, but the shift is in units of 5 songs. At first, the music is randomly selected from 1 to 10 songs and played. When the reproduction is completed, random selection reproduction of the next 6 to 15 songs is performed. As a result, there is a possibility that a song having a lower number than the song selected in the previous area may be selected, and the sense of randomness is further increased.

FIGS. 4 and 5 are flow charts cited for explaining the operation of the embodiment of the present invention, and show the respective processing procedures for a method for giving a sense of randomness. FIG. 4 corresponds to FIG. 3A, and FIG. 5 corresponds to the operation conceptual diagram shown in FIG. More specifically, all the procedures are programmed and recorded in the memory 7A shown in FIG. 1, and the functions are realized by the system controller 7 reading and executing them.

First, the operation of the embodiment of the present invention will be described with reference to the flowchart shown in FIG. First, the system controller 7 sets the TOC range, that is, the maximum number of recorded songs “99” permitted by the CD format as a variable n, and first selects the area 1 (1 to 10 songs) (step S31). Next, area 1 is selected and set in the area setting / switching determination box (step S32). Here, a random number m is generated for the first to tenth songs (step S33), and a track number corresponding to m is searched (step S33). Step S37). For example, the seventh song is searched, and it is determined that the search is completed normally in the search end determination box (step S38), and the song is reproduced (step S40). Then, it is checked whether or not all the songs have ended after waiting for the end of the reproduction of the song (step S41).

Here, once the selected music piece is reproduced, a so-called erase random reproduction (a method of recording the reproduced music piece in the table memory) is performed after which the selected music piece is not reproduced even if the selected music piece is selected. In detail, a table for storing the numbers of the reproduced songs for 99 songs is provided in a part of the memory 7A, and the song numbers corresponding to the songs whose reproduction has been completed are stored. Then, the music reproduced once is controlled so as not to be selected thereafter.

That is, at the time of selecting a disc in steps S33 to S36, the system controller 7 randomly selects a piece of music that has not been reproduced with reference to the table. For this reason, in step S42, it is determined whether or not the reproduction of all the songs recorded on the disc has been completed. However, there is no song selected by the random number, and the number of songs on the disc being played until the empty swing occurs. Since it is unclear whether or not the data has been recorded, it is determined by referring to the table whether or not reproduction of all 99 pieces of music permitted in the CD format has been completed.

Further, after the missed song is generated, it is determined whether or not all the songs in the range are reproduced, with the song number of the song number -1 which is missed as the virtual maximum song. If it is determined in step S43 that all the songs have not been completed, the area search continuation determination box (step S4
The process proceeds to 3). In step S43, for example, FIG.
As shown in (a), since a miss occurs only after "25" is reproduced, the process of step S45 is selected until that time, and the area number is updated by +1. However, if the area number is 9 (step S36), the process returns to area 1.

In the example shown here, until the area number is set to "3", the area search continuation determination box (step S43) makes a YES determination and sequentially updates the area number by +1. Then, area setting (steps S34 and S35), search for a track number corresponding to m (step S37), determination box of search normal end (step S38), reproduction (step S40), end of music (step S41), end of all music A series of processes by the determination box (step S42) and the area search continuation determination box (step S43) are repeated.

For example, the song number 25 is selected as the random number m in the area 3 and the 25th song is searched. If the 25th song does not exist, the song including the nonexistent song is included, and the subsequent songs are included. It is determined that the number does not exist in the disc. Then, 24, which is 25-1, is stored in the memory 7A as the virtual maximum tune. Also, in the table memory, the music numbers after the 25th music are stored as the reproduced music numbers so that the music numbers after the 25th music are not selected. As a result, the tune is treated in the same manner as a tune that has already been reproduced, and is not selected for subsequent reproduction. And
The area search ends (step S39).

Next, it is checked whether or not all the music has been reproduced (step S42), and it is checked whether or not the area search should be continued (step S43). Is updated to "24", and the process proceeds to step S47 to generate a random number m from 1 to n pieces of music. Then, the above steps S37 to S43
The process up to is repeated. At this point, after the area search is completed, random reproduction within n pieces of music (step S47) is repeated. After that, even when there are no songs in the song, when the song is missed, the missing song number -1 is replaced with a new n (step S39), the reproduction is continued until the end of all the songs, and the process proceeds to the random end process (step S46).

When the random playback of all the songs is completed, if the repeat random playback in which the random playback is performed again in all the songs is set, in the second random playback, in the disc in the first random playback, , The random number while shifting the area is not performed.
General random reproduction in which random numbers are generated within the total number of recognized songs may be performed. If the random reproduction of FIG. 4 has been completed and the total number of songs in the disc has been recognized, the total number of songs is stored in the memory 7A, and the random reproduction is performed before the disc is removed from the CD player. When a command is input, general random reproduction for generating a random number within the stored total number of music pieces is performed.

Next, the operation of the embodiment of the present invention will be described with reference to the flowchart shown in FIG. FIG.
In the example shown in FIG. 5, the selected songs sequentially increase and change, such as a one-digit song, a ten-digit song, a twenty-digit song, and a thirty-digit song. However, the selected music may be reversed by overlapping the areas before and after the setting, and in this case, a more random feeling can be obtained. This can be realized by making the number of songs to be shifted smaller than the width of the area. Here, the description will be made on the assumption that the width of the area is 10 songs and the music is shifted by 5 songs. That is, the area is set to 1 to 10 songs at first, and 6 to 15 songs next.

In FIG. 5, first, it is checked whether or not random reproduction is being performed (step S51). It is checked whether or not there is a random reproduction start request while the normal reproduction is being performed and the pickup is stopped. If there is a request here, "1" is temporarily set to the variable X, and the TOC range is set to "99" (step S53). Next, in order to specify the end song of the new range, the variable “Y” is set to “X +
9 "is set (step S54). Here, 1 to 10 songs are set as the area for the first time.

Next, it is checked whether or not the variable Y is within the TOC range (step S55). This step S5
Reference numeral 5 is for preventing a song number which is found not to exist on the disc from being included in Y. At first "9
9 ", the process proceeds to step S56, where it is checked whether there are unplayed songs from X to Y songs. If there are unplayed songs, a random number in the range from X to Y Is generated and the random number is set as N (step S5).
7). In step S57, it is determined whether or not the selected N has not been reproduced. If it has been reproduced, the process returns to step S57, where a random number is generated again and N is set. On the other hand, N
Is not played back, the Nth music is searched (step S5).
9).

Whether or not the N-th music is being reproduced is determined by referring to the above-mentioned memory table which stores the number of the music whose reproduction has been completed. Next, it is checked whether or not the search is successful (step S60). If the search is successful, the Nth tune is reproduced, and if the search is unsuccessful, the TOC range is set to "N-1".

In the process of step S51, since the random reproduction has already been performed from the second time, it is checked whether or not the music being reproduced has ended (step S63). When the reproduction of the music has been completed, it is checked whether or not all the music according to the above-described erase reproduction processing has been completed (step S6).
4) If there is an unplayed song, the variable “X” is set to “X + 5”
Is set (step S65). However, the variable Y is TOC
If it exceeds the range, the variable X is forcibly set to “1”,
Specify a new range of starting songs. Then, “X + 9” is set to the variable “Y”, and the end song in a new range is designated. Here, 6 to 15 songs are set as the area. Next, it is checked whether or not the variable "Y" is within the TOC range (step S55), and thereafter, the above-described series of processing from step S56 to S61 is repeated.

Next, in step S65, the variable "X"
Here, “X + 5” is set, so here “11”
Is set. In step S54, "X + 9" is set to the variable "Y", and "20" is set here. Then, in step S55, it is checked whether or not the variable "Y" is in the TOC range. Thereafter, random number generation N is performed in the range of X to Y, and search (step S59) and reproduction (step S61) are performed. Will be

Finally, when the area is selected from the 16th to 25th tunes and N is "25", the search fails (step S60).
The C range is set to “N−1”, specifically, “24” is held, and the variable “Y” is limited to “24” in step S66 through the processing in steps S65, S54, and S55. . In this way, the TOC range is narrowed, and step S
At 64, the random reproduction is finally terminated after all the music has been reproduced.

The above embodiment has been described with reference to a disk reproducing apparatus constituted by hardware. However, the present invention is not limited to this. A part or all of the configuration in FIGS. 1 and 2 and the control shown in FIGS. May be executed by an electronic device (for example, a personal computer or the like) having a built-in device to realize a function equivalent to that of a hardware information recording device.

For example, a personal computer having a monitor and a CD drive connected to the personal computer are prepared.
In addition, as a recording medium on which a computer program capable of operating on the OS of the personal computer and controlling the CD drive to reproduce information from the CD, and capable of controlling as shown in FIGS. CD-ROM disk is also prepared. And that CD
A computer program recorded on a ROM disk is installed in a personal computer, and the computer program is set up operably on the personal computer. Thereafter, a disk to be randomly reproduced, for example, a partial disk is set in the CD drive, and the same control as in the above-described embodiment is performed.

In this example, the computer program is installed in the personal computer via the CD-ROM, but the personal computer is connected to a network such as the Internet (including a wire such as a telephone line or a LAN or a wireless network). A similar computer program may be transmitted (downloaded) from another device (for example, a computer server) connected to the network via the network and set up in a personal computer.

As described above, the computer program is stored in C
By recording the data on a recording medium such as a D-ROM and executing the same, it is possible to achieve the same functions as in the above-described embodiment.

It should be noted that the disc inserted in the CD player is a general CD-DA in which music information is already registered.
It is determined whether the disc is a disc in which TOC is already recorded, such as a CD-R or a finalized CD-R, or a partial disc in which TOC is not recorded. Based on the result, control of random reproduction thereafter is performed. You may change it. More specifically, if the disc is a disc on which the TOC is recorded, the total number of songs can be determined from the contents of the TOC. Therefore, control is performed so that general random reproduction is performed while generating random numbers within the total number of songs. On the other hand, in the case of a partial disk, random reproduction as shown in FIGS. 4 and 5 is performed. By changing the random reproduction control based on such disc discrimination, in the case of a partial disc, even if the total number of songs is not known, it is possible to play with a sense of randomness, and the TOC recorded that the total number of songs is known In the case of a disc, it is possible to perform general random reproduction with a stronger sense of randomness than the control shown in FIGS.

[0051]

As described above, according to the present invention, a predetermined music range (area) is set by subdividing the number of recording musics allowed on a disc, and random music selection reproduction is performed within that range. By repeating the random song selection reproduction within the range while sequentially shifting the area in ascending order, or by repeating the random song selection reproduction within the range with all the recorded songs as a predetermined song range,
A normal CD player allows random reproduction of partial discs such as CD-Rs and CD-RWs, suppresses the probability of searching for non-existent music, and recognizes the last recorded music number earlier.

Further, by setting the number of pieces of music to be shifted to be smaller than the number of pieces of area music and repeating random selection and reproduction within that range, a more random feeling can be given to the user.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a CD player in which the present invention is implemented.

FIG. 2 is a functional block diagram of the system controller shown in FIG. 1;

FIG. 3 is an operation conceptual diagram showing an operation of the embodiment of the present invention on a time axis.

FIG. 4 is a flowchart showing an operation of the embodiment of the present invention (when predetermined music ranges do not overlap each other).

FIG. 5 is a flowchart showing the operation of the embodiment of the present invention (when a predetermined music range overlaps before and after).

[Explanation of symbols]

7: System controller, 7A: Memory, 71: Random reproduction control unit, 72: Random reproduction output unit, 711 ...
Music range setting unit, 712: random number generation unit, 713: music range switching unit,

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Masayo Matsumoto 4-2610 Hanazono, Tokorozawa-shi, Saitama Pioneer Corporation Inside Tokorozawa Plant (72) Yoshihiro Aso 4-2610 Hanazono, Tokorozawa-shi, Saitama Pioneer Corporation F-term in Tokorozawa factory (reference) 5D077 AA28 BA08 CA02 CB03 DC12 DC25 DC39 DE13 EA32 HC05

Claims (11)

[Claims] 1. A disc reproducing method for reproducing a song recorded on a disc, comprising: a first setting step of setting a predetermined song range including a plurality of songs as a target of random song selection; Select songs randomly from the song range,
A reproduction step of reproducing the selected music; and a second setting step of setting a new predetermined music range including a music number larger than the largest music number in the predetermined music range which was previously selected. A disc reproducing method, comprising: repeating the reproducing step and the second setting step after the first setting step. 2. The disc reproducing method according to claim 1, wherein the predetermined music range that is set does not include the music within the predetermined music range that was previously selected. 3. The disc reproducing method according to claim 1, wherein the set predetermined music range includes a music in the predetermined music range which was previously selected. 4. When it is confirmed that the selected music is a non-existent music not recorded on the disc,
4. The disk reproducing method according to claim 3, wherein a music piece having a music number smaller than the non-existing music piece is selected at random thereafter, and the selected music piece is reproduced. 5. A disc reproducing method for reproducing a song recorded on a partial disk, comprising: a selecting step of randomly selecting a song recorded on the partial disk; and reproducing the song selected in the selecting step. When the selected song is confirmed to be a non-existent song that is not recorded on the disc, a subsequent song having a song number smaller than the non-existent song is performed. A random selection, and playing back the selected music. 6. A disk reproducing apparatus for reproducing music recorded on a disk, comprising: setting means for setting a predetermined music range including a plurality of music; And a reproducing unit for reproducing the song selected by the selecting unit. In the setting of the predetermined song range, the setting unit sets the largest song number in the previously set predetermined song range. A disc reproducing apparatus for setting a predetermined music range including a larger music number. 7. The disk reproducing apparatus according to claim 6, wherein the setting means sets the predetermined music range so as not to include the music within the previously set predetermined music range. 8. The disc reproducing apparatus according to claim 6, wherein said setting means sets the predetermined music range so as to include the music within the previously set predetermined music range. 9. When it is confirmed that the selected tune is a non-existent tune not recorded on the disc, the selecting means targets a tune having a tune number smaller than the non-existent tune. 9. The disk reproducing apparatus according to claim 6, wherein music is selected at random. 10. A disc reproducing apparatus for reproducing a song recorded on a partial disk, a selecting unit for selecting a song recorded on the partial disk, and a reproducing unit for reproducing a song selected by the selecting unit. When it is confirmed that the selected song is a non-existent song that is not recorded on the partial disk, the selecting means targets a song having a song number smaller than the non-existent song A disc reproducing apparatus characterized by selecting a song at random. 11. A recording medium on which a computer program for reproducing a song recorded on a disk is recorded, wherein the computer program sets a predetermined song range including a plurality of songs as a target of random song selection on a computer. The selected music is randomly selected from the set predetermined music range, and the selected music is reproduced by the reproducing means, and the computer is selected from the largest music number in the predetermined music range which was previously selected. A recording medium storing a computer program for setting a new predetermined music range including a large music number.