JP2002279771A - Signal reproducing method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a reproducing operation corresponding to a recording medium in which group management information is recorded. SOLUTION: A recording medium is used on which contents signals and additional information for managing the contents signals for each track is recorded, and when group management information for grouping the contents signals recorded in the additional information of the recording medium by track units is included, and any group is designated in an ST14, the order of reproduction of the pieces of music in the group is programmed in an ST16, and the reproduction is started in the order of the programs in an ST17. When a skip operation is performed in an ST19, the process is advanced to an ST21, and whether or not the reproduction of the programmed music is stopped is determined. The reproducing operation is stopped in an ST23, and the process is advanced to an ST24, and when a new group is designated by the skip operation, the process is returned to the ST15. Thus, it is possible to perform the switching of not only the contents signal but also the group indicated by the group management information by performing the skip operation. It is therefore possible to realize a reproducing operation corresponding to the recording medium on which the group management information is recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a signal reproducing method and a signal reproducing apparatus. More specifically, when a recording medium on which a content signal and additional information for managing the content signal for each track are recorded is used, and the additional information includes group management information for grouping the content signal on a track basis, When a predetermined key operation is performed during the reproduction of the content signal recorded in the reproduction signal, the track to be reproduced is switched, and when the predetermined key operation is performed while the reproduction operation is stopped, the reproduction is performed. The group to be switched is changed.

[0002]

2. Description of the Related Art A conventional signal reproducing apparatus reproduces not only a content signal of audio content such as music, but also a recording medium on which additional information for easily reproducing a desired content signal is recorded. For example, in a mini-disc device using a mini-disc which is a recording medium that can be accessed randomly, additional information is read from a mini-disc in which signals of music and the like are recorded in track number (song number) units, and this additional information is used. Then, the reproduction of the content signal is performed.

The additional information indicates the title of a recording medium, the title of a recorded song, the signal recording position of each track, and the like. For example, by specifying the track number of a desired song name, The signal is read from the associated recording position, and the music having the desired music title can be easily reproduced.

In a recording medium and a signal reproducing apparatus, high-density recording and high compression of a signal to be recorded have been attempted.
Signals and the like of many music pieces are recorded on one recording medium, and these signals can be correctly read and reproduced by a signal reproducing device. For example, in the above-mentioned mini disk device, a device that conforms to the “MDLP” standard that can record many music signals by increasing the compression ratio of a signal to be recorded has been put to practical use.

Here, when a large number of music pieces are recorded on one recording medium, the number of pieces of identification information increases, so that it is easy to determine which identification information is selected to reproduce a desired music piece. I can no longer do it. For this reason, it is proposed to group recorded music pieces and to specify identification information from the selected group, so that a signal of a desired content can be easily reproduced even when the number of identification information increases. Has been made.

[0006]

When the identification information is grouped, group management information indicating what kind of grouping is performed is also recorded on the recording medium together with the identification information. Therefore, a conventional recording medium in which identification information is recorded but no group management information is recorded, and a recording medium in which identification information and group management information are recorded coexist, and both recording media are used. In a signal reproducing apparatus capable of reproducing a signal by using a digital signal, it is desirable to perform an operation corresponding to a recording medium.

Therefore, according to the present invention, there is provided a signal reproducing method and a signal reproducing apparatus capable of performing a reproducing operation according to a recording medium on which the group management information is recorded, when the group management information is recorded on the recording medium. To provide.

[0008]

A signal reproducing method according to the present invention uses a recording medium on which a content signal and additional information for managing the content signal for each track are recorded, and tracks the content signal on the additional information of the recording medium. When group management information for grouping by unit is included, when a predetermined key operation is performed during reproduction of the content signal recorded on the recording medium, the track to be reproduced is switched, and the reproduction operation is stopped. When a predetermined key operation is performed during the operation, the group to be reproduced is switched.

[0009] The signal reproducing apparatus reproduces a recording medium on which a content signal and additional information for managing the content signal for each track are recorded, an information holding means, an operating means, a reproducing means, and information. Operation control means for controlling the holding means, wherein the operation control means reads the additional information from the recording medium by the reproducing means and causes the information holding means to hold the information; and the content recorded in the additional information held by the information holding means. If it is determined that the signal includes group management information for grouping the signals in track units,
When a predetermined key operation is performed by the operation means during reproduction of the content signal recorded on the recording medium, the track to be reproduced is switched, and when the reproduction operation of the recording medium is stopped, the predetermined key operation is performed. If done,
This switches the group to be reproduced.

In the present invention, for example, a mini-disc on which a music signal and additional information are recorded is used, and the additional information includes group management information for grouping and managing the recorded music. In the case, when the skip operation is performed during the reproduction of the content signal recorded on the mini disc, the track to be reproduced is switched, and when the skip operation is performed when the reproduction operation is stopped, The group to be reproduced is switched.

[0011]

Next, the present invention will be described in detail with reference to the drawings. The following description is based on the assumption that a mini-disc device is used as a signal reproducing device, and that a signal of a music piece, which is a content signal recorded on a mini-disc, is reproduced.

FIG. 1 shows the configuration of a mini disk device. Minidisc 10 mounted on minidisc device
0 is rotationally driven by the spindle motor unit 21.
A magnetic head 22 for recording is arranged on one surface (upper surface in the figure) of the mini-disc 100, and an optical pickup unit 23 is arranged on a laser beam irradiating surface, which is a lower surface, to record signals. The laser beam can be applied to the position where the magnetic field modulated based on the magnetic field is applied by the magnetic head 22.

The optical pickup unit 23 irradiates a laser beam of a predetermined power to the mini disk 100 based on a laser control signal CP from a servo control unit 25 to be described later, and reads a read signal RS based on the reflected light from the mini disk 100. Is generated and supplied to the RF amplifier unit 24. The RF amplifier section 24 generates a digital read data signal RE from the read signal RS supplied from the optical pickup section 23 and supplies the digital read data signal RE to the signal processing section 30. Also, the RF amplifier unit 2
4, the focus error signal F based on the read signal RS
E and a tracking error signal TE are generated and supplied to the servo control unit 25. Further, a wobble signal RB, which is a signal obtained by reading a wobble of a pre-groove formed in advance on the mini disc 100, is generated and the decoder unit 2
8

The servo controller 25 includes an RF amplifier 24
Generates a focus control signal FC and a tracking control signal TC for adjusting the position of an objective lens (not shown) of the optical pickup unit 23 based on the focus error signal FE and the tracking error signal TE supplied from the driver. 26.

In the driver 26, the focus control signal F
A focus drive signal FD is generated based on C, and a tracking drive signal TD is generated based on the tracking control signal TC. This focus drive signal FD
And the tracking drive signal TD to the optical pickup 2
The laser beam is supplied to a third actuator (not shown) to adjust the position of the objective lens, so that the laser beam is controlled to be focused at a desired position on the laser beam irradiation surface side of the mini disc 100.

The servo controller 25 generates a thread signal SSL and supplies it to the thread motor 27. The thread motor 27 controls the optical pickup so that the irradiation position of the laser beam does not exceed the tracking control range. 23 is moved in the radial direction of the mini-disc 100.

In the decoder section 28, the wobble signal RB
The wobble component is extracted and binarized by performing band limitation, and further demodulated to perform the address information signal DAD.
Is generated and supplied to the operation control unit 40. Further, the synchronization pattern of the obtained address information signal DAD is detected, and a disk drive signal SSPa is generated so that the rotation speed of the mini disk 100 becomes a desired speed.
1 to control the rotation speed of the mini-disc 100. Further, based on a frame synchronization signal detected from the read data signal RE by the signal processing unit 30 described later, a disk drive signal SSPb is generated so that the rotation speed of the mini disk 100 becomes a desired speed and supplied to the spindle motor unit 21. Therefore, even if the wobble is not formed, the mini-disc 100 can be rotated at a desired speed even for a read-only mini-disc.

In the signal processing unit 30, the read data signal RE supplied from the RF amplifier unit 24 is subjected to an EFM (Eig
ht to Fourteen Modulation) decoding and CIRC
(Cross Interleaved Reed Solomon Code) is decoded. The compressed data signal RD obtained by performing the decoding process is supplied to the earthquake-resistant memory 32 via the memory controller 31. The seismic memory 32 is configured using a rewritable dynamic RAM or the like, for example.
The supplied compressed data signal RD is temporarily held. Also,
The write position and the read position of the data signal in the seismic memory 32 are managed by the memory controller 31.

Further, the signal processing section 30 generates the disk drive signal SSPb and supplies it to the spindle motor section 21 as described above, and also supplies the additional information obtained based on the read data signal RE to the work memory 41. I do.

The compressed data signal RD held in the earthquake-resistant memory 32 is sequentially read out by the memory controller 31 and supplied to the compression / decompression processing unit 33. In the compression / decompression processing unit 33, ATRAC (Adaptive Transform Ac
oustic Coding) or ATRAC3 decoding processing to decode the compressed data signal. The data signal obtained by this decoding processing is D as an audio data signal Dout.
/ A conversion unit 34. In the D / A converter 34,
The audio data signal Dout is converted into an analog audio output signal Sout and output.

The analog audio input signal Sin supplied to the mini disk device is converted into a digital audio data signal Din by the A / D converter 35 and supplied to the compression / decompression processing unit 33.

In the compression / decompression processing section 33, the A / D converter 3
ATR for the audio data signal Din supplied from
The audio data signal Din is encoded by performing an encoding process of AC or ATRAC3. The data signal obtained by this encoding process is supplied to the memory controller 31 as a compressed data signal WD.

The memory controller 31 stores the compressed data signal WD supplied from the compression / decompression processing unit 33 in the seismic memory 32 sequentially. Further, the compressed data signal WD temporarily stored in the seismic memory 32 is read and supplied to the signal processing unit 30.

The signal processing unit 30 performs CIR processing on the compressed data signal WD supplied from the memory controller 31.
C encoding processing and EFM encoding processing are performed.
A signal obtained by performing the encoding process is supplied to the recording amplifier 38 as a recording data signal WS.

In the recording amplifier 38, the supplied recording data signal WS is amplified and supplied to the recording magnetic head 22, and a magnetic field corresponding to the recording data signal WS is applied to the magnetic head 22.
Generated by At this time, the mini disc 100 is irradiated with a laser beam of a predetermined power from the optical pickup section 23 by the laser control signal CP from the servo control section 25, and the mini disc 100 has a magnetic field generated by the magnetic head 22. Is formed and a signal is recorded.

When various types of additional information recorded in the lead-in area or the user TOC area of the mini disc 100 are read, the read additional information is sent from the signal processing unit 30 as described above. Operation control unit 40
Is supplied to and held in the work memory 41 connected to the.

The operation control unit 40 is constituted by using a microcomputer. The operation control unit 40 includes an operation unit 42 and a display unit 43 for switching the operation of the work memory 41 and the mini disk device. It is connected. The operation control unit 40 generates an operation control signal CT based on various information held in the work memory 41, the address information signal DAD from the decoder unit 28, and the operation signal PS from the operation unit 42. Signal CT
By controlling the operations of the servo control unit 25, the signal processing unit 30, the memory controller 31, and the like, the signals are recorded on the mini disk 100, the recorded signals are reproduced, and the recorded signals are edited. The operation control unit 40 also changes the information held in the work memory 41 according to the recording operation and the editing process.

Further, a display unit 43 is connected to the operation control unit 40, and a display control signal P from the operation control unit 40 is provided.
By D, the operating state of the mini-disc device, various information recorded on the mini-disc, and the like are displayed on the display section 43.

FIG. 2 shows the structure of the mini disk 100 used in the mini disk device.
At the center of 00, a clamping plate 100a for holding a disk is provided. Mini disc 1
The lead-in area 1 is located at the innermost periphery of
00b is formed, and on a recordable / reproducible disc, a TOC (Table) such as an output of a laser beam at the time of recording and addresses of a user TOC area and a program area described later.
of Contents) information is recorded as additional information. The user TOC area 1 is located on the outer peripheral side of the lead-in area 100b.
00c is formed in the user TOC area 100c.
Contains the title of the mini disc and the program area 100
Information related to music and the like recorded in d, information indicating a signal recording position for each track and the like can be recorded as additional information.

A program area 100d is formed on the outer peripheral side of the user TOC area 100c, and a music signal is recorded in the program area 100d. Further, a lead-out area 100e is provided on the outer peripheral side of the program area 100d.
Is formed. In a mini disc for reproduction only, a program area is provided on the outer peripheral side of the lead-in area.

Here, in sector 0 of the user TOC area 100c, the start address and end address of each track of the mini disk, and the next signal recording position is determined even if the signal of this track is not recorded in a continuous area. Link information enabling continuous reproduction is recorded for each track number. Also, address information of the free area of the mini disc is recorded. For this reason, it is possible to reproduce the music of the selected track number based on the start address and the end address of the selected track number. In addition, a new music piece can be recorded in the free area by using the address information of the free area. Further, by rewriting the information of the sector 0 and changing the relationship between the track number and the start address or the end address, it is possible to separate or combine the music without changing the signal recording position of the music recorded in the program area 100d. , Delete, and move edit processing.

Sector 1 and / or sector 4 (hereinafter simply referred to as "sector 1") have a disk name area and a track name area. In the disk name area, group management information is recorded together with the title of the disk. . In the track name area, the title of the recorded music, the name of the player, and the like are recorded in association with the track number. Further, in the sector 2, the recording date and time of each music piece is recorded.

The group management information is information for managing the recorded music in groups to facilitate selection of the recorded music. This grouping is performed by the user so as to facilitate selection of music. For example, recorded music is grouped by genre or grouped by player. The group management information includes a group name and information indicating music included in the group.

FIG. 3 is a diagram for explaining the relationship between music and group management information. Here, the title of the mini-disc is “DNs”, and as shown in FIG. 3A, the songs with song names “P1” to “P12” are recorded as track numbers “1” to “12” As shown in FIG. 3B, the information of the sector 1 when no grouping is performed is stored in the disc name area in the disc name “D”.
Ns "is recorded, and in the track name area,
The song names "P1" to "P12" are recorded in association with the track numbers.

As shown in FIG. 3A, track numbers "1" to "4" are grouped to form a group name "GNa".
And the track numbers “5” to “9” are grouped into a group name “GNb”. Further, the track number “1”
"0" to "12" are grouped into a group name "GNc"
In this case, as shown in FIG. 3C, group management information indicating the relationship between the group name and the track number is recorded in the disc name area.

Here, in the mini disk device, an operation mode is selected based on whether or not group management information is recorded in the disk name area, and an operation corresponding to the mini disk is performed.

FIG. 4 is a flowchart showing the operation of the mini disk device. When the minidisk 100 is mounted on the minidisk device or when the operation of the minidisk device is started, in step ST1, additional information is read out, that is, the additional information in the lead-in area and the user TOC area is read and the work memory is read. Then, the process proceeds to step ST2.

In step ST2, it is detected whether or not the information of the disc name area includes group management information. Here, as shown in FIG. 3C, when the group management information is included, the process proceeds to step ST3, and when it is not included, the operation mode is set to the non-group mode in step ST4.

In step ST3, it is determined whether or not there is a group in which tracks are registered, that is, a group whose track number is indicated in the group management information. Here, only the group name is set,
If there is only a group that does not indicate a track number belonging to the group, the program proceeds to step ST4 because the music cannot be grouped based on the group management information, and the operation mode is set to the non-group mode. FIG. 3C
When a group indicated by a track number is provided as shown by, the operation proceeds to step ST5, and the operation mode is set to the group mode.

As described above, the operation mode is automatically switched to the group mode or the non-group mode depending on whether or not the group management information having the group in which the track is registered is recorded as the additional information. The user can easily set the operation mode according to the mini-disc without operating the operation unit 42 to set the operation mode.

Here, when the operation mode is set to the non-group mode, a signal reproducing operation or the like is performed using the track number, similarly to the conventional mini disk device.
When the operation mode is set to the group mode, a signal reproducing operation or the like is performed in units of groups indicated by the group management information.

Here, when the operation mode is set to the non-group mode, a signal reproducing operation or the like is performed by using the track number, similarly to the conventional mini disk device.
When the operation mode is set to the group mode, a signal reproducing operation or the like is performed in units of groups indicated by the group management information.

FIG. 5 is a flowchart showing the operation in the group mode. In step ST11, a group number is assigned to the group indicated by the group management information held in the work memory 41, and the process proceeds to step ST12. In step ST12, an intra-group number is set. For example, when the groups are grouped as shown in FIG. 3A, the group “GNa” has the group number “G1” and the group “GNb”
“GNc” is the group number “G2” “G3”.
Also, the track numbers “5” to “5” of the group “GNb”
The tune of “9” is a track number (hereinafter referred to as “group number”) “T1” to “T5” in the group. Similarly, the track number “1” of the group “GNc”
The songs of “0” to “12” are group numbers “T1” to
It becomes "T3".

In step ST13, it is determined whether or not to execute the program reproduction in which the reproduction order of the music is specified. Here, when the program reproduction is selected by the operation unit 42, the process proceeds to step ST14. If program reproduction is not selected and normal reproduction is performed in which music is reproduced in the order of track numbers, the process proceeds to step ST31 in FIG.

In step ST14, a group designation process is performed. In the group designation process, for example, the group name indicated by the group management information is displayed on the display unit 43, and the user is prompted to select a group to which group the music is played. Here, when the operation unit 42 is operated and a group is designated, step ST
The process proceeds from step 14 to step ST15.

In step ST15, it is determined whether or not a track is registered in the designated group. Here, if no track is registered in the group, the process returns to step ST14, and the group designation process is performed again. When a track is registered in the group, the process proceeds to step ST16.

In step ST16, the reproduction order is programmed using the in-group number of the designated group, and the flow advances to step ST17 to start reproducing the music in the programmed order.

In step ST18, it is determined whether or not an operation for canceling the operation in the group mode has been performed during the program reproducing operation. If the canceling operation has not been performed, the process proceeds to step ST19, and if the canceling operation has been performed. It proceeds to step ST25.

In step ST19, it is determined whether or not a skip operation for moving the music to be reproduced to the next music has been performed. Here, when the skip operation is not performed, the process proceeds to step ST20, and when the skip operation is performed, the process proceeds to step ST21.

In step ST20, it is determined whether or not the music being reproduced has ended. If not, the process returns to step ST18 to continue the reproduction operation and perform a group mode release operation or a skip operation during the reproduction operation. It is determined whether or not the operation has been performed. When the reproduction is completed, the process proceeds to step ST21.

In step ST21, it is determined whether or not reproduction of all programmed music has been completed. here,
If there is any unreproduced music, the process proceeds to step ST22, where the reproduction of the next program music is started, and the process returns to step ST18. When the reproduction of the programmed music has been completed, the process proceeds to step ST23,
The disc reproducing operation in the mini disc device is stopped, and the process proceeds to step ST24.

In step ST24, it is determined whether or not a predetermined operation key of the operation unit 42, for example, a skip operation key or a number input key has been operated to designate a new group. Here, when the skip operation key is operated during the reproduction operation, the reproduction of the next music piece is performed as described above, and when the skip operation key is operated while the reproduction operation is stopped, for example, the next group is newly set. The process is designated as a group and returns to step ST15. Alternatively, the process returns to step ST15 when a new group number is designated by the numeric input keys. When a new group is not specified, the operation in the group mode is terminated. Although not shown in the figure, it is of course possible to return to the previous playback music or the previous group by operating the skip operation key.

In step ST18, it is determined that the operation for canceling the operation in the group mode has been performed, and step S18 is executed.
When the process proceeds to T25, in step ST25, the program contents are erased, that is, the reproduction order information of the programmed music is erased, and the process proceeds to step ST26. In step ST26, the operation is switched to the operation in the non-group mode. Therefore, it is possible to prevent the reproduction order information in the group mode from being used in the operation in the non-group mode.

FIG. 6 is a flowchart showing a normal reproduction process in the operation in the group mode. When the program reproduction is not selected in step ST13 of FIG. 5, it is assumed that the normal reproduction is to be performed, and step ST31 of FIG.
Proceed to.

In step ST31, step ST14 is executed.
A group designation process is performed in the same manner as in. When a group is designated by the group designation process, the process proceeds from step ST31 to step ST32.

In step ST32, it is determined whether or not a track is registered in the designated group. If no tracks are registered in the group, the process proceeds to step ST33. When a track is registered in the group, the process proceeds to step ST34.

In step ST33, since no track is registered in the specified group, the group in which the track is registered is automatically selected, and the selected group is set as the specified group. Proceed to ST34. For example, as shown in FIG.
When the group “GNd” where no track is registered is defined as the last group, when the group “GNd” is designated, the immediately preceding group “GNc” or the first group “GNd” is substituted for this group. “GNa” is automatically set as the designated group. When no track is registered in the specified group and a different group is set as the specified group, the specified group is automatically displayed on the display unit 43 to indicate that fact. It can be determined even if it is changed.

In step ST34, the reproduction of the music is started in the order of the designated group number within the group, and the process proceeds to step ST35.

In step ST35, during the normal reproduction operation,
It is determined whether or not an operation for canceling the operation in the group mode has been performed. If the cancel operation has not been performed, the process proceeds to step ST36.
Proceed to 42.

In step ST36, it is determined whether or not a skip operation has been performed. If the skip operation has not been performed, the process proceeds to step ST37. If the skip operation has been performed, the process proceeds to step ST38.

In step ST37, it is determined whether or not the music being reproduced has ended. If not, the flow returns to step ST35 to continue the reproduction operation and perform a group mode release operation or a skip operation during the reproduction operation. It is determined whether or not the operation has been performed. When the reproduction is completed, the process proceeds to step ST38.

At step ST38, it is determined whether or not all the music pieces in the group have been reproduced. Here, if there is any music that has not been played, the process proceeds to step ST39, starts playing the music of the next group number, and returns to step ST35. When all the songs in the group have been completely reproduced, the process proceeds to step ST40, in which the disc reproducing operation of the mini disc device is stopped, and the process proceeds to step ST41.

In step ST41, it is determined whether or not the operation unit 42 has been operated to designate a new group. When a new group has been designated, the process returns to step ST32. When a new group is not specified, the operation in the group mode is terminated.

In step ST35, it is determined that the operation for canceling the operation in the group mode has been performed, and step S35 is executed.
When the operation proceeds to T42, in step ST42, the operation is switched to the operation in the non-group mode.

As described above, in the operation in the group mode, only the track numbers registered in the designated group can be played back. Is performed for each player, it is possible to easily select only the music of the desired player by specifying a group. Also, by playing the program in the group mode, it is possible to easily play back only the songs of the desired player in a desired order. In addition, when music recorded on a compact disc is dubbed to a mini disc, grouping is performed for each compact disc, so that even when music recorded on a plurality of compact discs is recorded on the mini disc, one compact disc can be recorded. A reproduction operation similar to the reproduction operation can be performed.

Next, in the operation in the non-group mode, the reproduction in the order of the track numbers and the program reproduction are performed without using the group management information, similarly to the conventional mini disk device. 7 and 8 are flowcharts showing the operation in the non-group mode.

In step ST51, it is determined whether or not to execute program reproduction in which the reproduction order of music has been designated. Here, when the program reproduction is selected by the operation unit 42, the process proceeds to step ST52. If program reproduction is not selected and normal reproduction is performed in which music is reproduced in the order of track numbers, the process proceeds to step ST71 in FIG.

In step ST52, the reproduction order is programmed using the track number, and the process proceeds to step ST53, in which the reproduction of music is started in the programmed order.

In step ST54, it is determined whether or not an operation for canceling the operation in the non-group mode has been performed during the program reproducing operation. If the canceling operation has not been performed, the process proceeds to step ST55, where the canceling operation is performed. And proceeds to step ST60.

In step ST55, it is determined whether or not a skip operation for moving the music to be reproduced to the next music has been performed. Here, when the skip operation is not performed, the process proceeds to step ST56, and when the skip operation is performed, the process proceeds to step ST57.

In step ST56, it is determined whether or not the music being reproduced has ended. If not, the process returns to step ST54 to continue the reproduction operation and release or skip the non-group mode during the reproduction operation. Is determined. When the reproduction is completed, the process proceeds to step ST57.

In step ST57, it is determined whether or not the reproduction of the programmed music has been completed. here,
If there is any unreproduced music, the process proceeds to step ST58, where the reproduction of the next program music is started, and the process returns to step ST54. When the reproduction of all the programmed music has been completed, the process proceeds to step ST59, where the disk reproduction operation in the mini disk device is stopped, and the operation in the non-group mode is ended.

In step ST54, it is determined that the operation for canceling the operation in the group mode has been performed, and step ST60 is performed.
In step ST60, the process proceeds from the group mode and determines whether or not the operation in the non-group mode is being performed. Here, when the non-group mode is set by the mode selection operation shown in FIG. 4, since the operation in the group mode cannot be performed, step S
Proceeding to T55, the release operation is invalidated. If the operation is shifted from the group mode and the operation in the non-group mode is being performed, the operation in the group mode can be performed, and the process proceeds to step ST61.

In step ST61, the program contents are erased, that is, the reproduction order information of the programmed music is erased, and the process proceeds to step ST62. In step ST62, the operation is switched to the operation in the group mode. Therefore, it is possible to prevent the reproduction order information in the non-group mode from being used in the operation in the group mode.

If program reproduction is not selected in step ST51, it is determined that normal reproduction is to be performed, and the process proceeds to step ST71 in FIG.

At step ST71, the reproduction of the music is started in the order of the track number, and the process proceeds to step ST72.

In step ST72, during the normal reproduction operation,
It is determined whether or not an operation for canceling the operation in the non-group mode has been performed. If the canceling operation has not been performed, the process proceeds to step ST73.
Proceed to T78.

In step ST73, it is determined whether or not a skip operation has been performed. If the skip operation has not been performed, the process proceeds to step ST74, and if the skip operation has been performed, the process proceeds to step ST75.

In step ST74, it is determined whether or not the music being reproduced has ended. If not, the flow returns to step ST72 to continue the reproduction operation and release or skip the non-group mode during the reproduction operation. Is determined. When the reproduction is completed, the process proceeds to step ST75.

In step ST75, it is determined whether or not reproduction of all music has been completed. Here, if there is any unreproduced music, the process proceeds to step ST76, the music of the next track number starts to be reproduced, and the process returns to step ST72. When the reproduction of all the music pieces is completed, the process proceeds to step ST77, where the disc reproducing operation in the mini disc device is stopped, and the operation in the non-group mode is ended.

In step ST72, it is determined that the operation for canceling the operation in the non-group mode is performed, and step ST7 is performed.
In step ST78, the process proceeds to step ST60.
Similarly to the above, it is determined whether or not the operation is shifted from the group mode and the operation in the non-group mode is performed. If it is not a shift from the group mode, step ST7
Proceed to 3 to invalidate the release operation. If it is the shift from the group mode, the process proceeds to step ST79,
Switches the operation to the operation in the group mode.

If the operation in the group mode is canceled and the operation shifts to the operation in the non-group mode in steps ST26 and ST42 described above, the process proceeds to step ST72 in FIG. The reproduction operation is performed in the order of the track numbers. Further, when returning to the group mode in step ST62 or step ST79, the in-group number and the group number of the music being reproduced are determined, and the process proceeds to step ST35 in FIG. 6 to continue the reproduction of the music being reproduced. The playback operation is performed in the order of the group number of the group in which the middle music is registered. For this reason, even if the operation mode is switched, the music can be correctly reproduced in the order according to each operation mode.

According to the above-described embodiment, when it is determined that the group management information is included in the additional information, the skip operation is performed during the reproduction of the content signal recorded on the mini disc. Sometimes, a track to be reproduced is switched, and when a skip operation is performed while the reproduction operation is stopped, a group to be reproduced is switched. As described above, not only can the music be switched by a predetermined key operation, but also the group indicated by the group management information is switched, so that the playback operation according to the mini-disc on which the group management information is recorded is performed. It can be performed. In the above-described embodiment, a case has been described in which music is recorded on a mini-disc using a mini-disc device. However, if a recording medium on which a content signal and the additional information as described above are recorded is used, the recording medium may be a mini-disc. It is not limited to disks. Also, the content signal is not limited to the audio content signal, but may be a video content signal or the like.

[0084]

According to the present invention, when it is determined that the group management information is included in the additional information, the reproduction is performed when a predetermined key operation is performed during the reproduction of the content signal recorded on the recording medium. When a predetermined key operation is performed while the reproduction operation is stopped, the group to be reproduced is switched. As described above, not only the switching of the content signal but also the switching of the group indicated by the group management information are performed by the predetermined key operation, so that the reproduction operation according to the recording medium on which the group management information is recorded can be performed. Can be.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a mini disk device.

FIG. 2 is a diagram showing an area configuration of a mini disc.

FIG. 3 is a diagram for explaining song grouping and group management information.

FIG. 4 is a flowchart illustrating a mode selection operation.

FIG. 5 is a flowchart showing an operation (1/2) in a group mode.

FIG. 6 is a flowchart showing an operation (2/2) in the group mode.

FIG. 7 is a flowchart showing an operation (1/2) in a non-group mode.

FIG. 8 is a flowchart showing an operation (2/2) in the non-group mode.

[Explanation of symbols]

 Reference Signs List 21 spindle motor unit 22 magnetic head 23 optical pickup unit 24 RF amplifier unit 25 servo control unit 26 driver 27 thread motor unit 30 signal processing unit 31 memory controller 32 seismic memory unit 33 compression / decompression processing unit 34 D / A conversion unit 35 A / D converter 38 Recording amplifier 40 Operation control unit 41 Work memory 42 Operation unit 43 Display unit 100 Mini disk

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akihiko Mezaki 1-2-1-11 Ikenoba, Taito-ku, Tokyo F-term in Iwa Corporation (reference) 5D044 AB05 BC06 CC06 DE23 DE38 DE54 FG10 FG19 GK08 5D077 AA30 BA14 CA11 CB03 CB12 DC12 EA33 EA34 5D110 AA19 AA27 DA01 DA06 DA11 DA12 DA17 DB03 DB09 DC05 DC06

Claims (2)

[Claims] 1. A recording medium on which a content signal and additional information for managing the content signal for each track are recorded, and the additional information of the recording medium includes group management information for grouping the content signal on a track basis. When a predetermined key operation is performed during reproduction of the content signal recorded on the recording medium, the track to be reproduced is switched, and when the reproduction operation is stopped, the predetermined key operation is not performed. A signal reproducing method, wherein, when performed, a group to be reproduced is switched. 2. A reproducing unit for reproducing a recording medium on which a content signal and additional information for managing the content signal for each track are recorded, an information holding unit, an operating unit, and the reproducing based on an operation of the operating unit. And an operation control means for controlling the information holding means. In the operation control means, the reproducing means reads the additional information from the recording medium and causes the information holding means to hold the additional information. When it is determined that the additional information held in the storage unit includes group management information for grouping the recorded content signals on a track basis, the operation unit performs a predetermined operation while the content signal recorded on the recording medium is being reproduced. When the key operation is performed, the track to be reproduced is switched, and the reproduction operation of the recording medium is stopped. When the predetermined key operation is performed to come, the signal reproducing apparatus which is characterized in that the switching of a group to be reproduced.