JP2006190465A - Reproducing device, data reproducing method for the same, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily grasp information on a group. <P>SOLUTION: A system controller 9 reads U-TOC information from a disk 1, extracts group information from data, when the data regarding the group information are recorded, and writes the extracted group information to a buffer memory 12. When user data recorded in the disk 1 are reproduced, the system controller 9 reads the group information from the buffer memory 12, analyzes the information to obtain the number of music pieces within the group, and displays the obtained number of music pieces within the group in a display part 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a playback apparatus, a data playback method for the playback apparatus, and a program.

  In MDLP (MiniDisc Long-Play Mode), a new group management function is conceivable, and it is recommended to add this function.

  This group management function groups recording information such as music recorded on a mini-disc (MD: Mini Disc), and allows track information on the disc to be searched in groups (folders). .

  As a function similar to this group management function, there is an MP3 player folder search function. In this function, when a group is searched or reproduced, the number or title of the folder is displayed.

  However, in such a conventional playback apparatus, only group information such as a folder number or a title is displayed, and there is no information on how much user data is included in the group. Therefore, the user data in the group cannot be grasped, and it is inconvenient for the user to search for a desired group.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a playback apparatus, a recording medium group information display method, and a program capable of easily grasping information about a group. To do.

In order to achieve this object, a playback device according to the first aspect of the present invention provides:
In a playback device that reads the data of the file from a recording medium in which a plurality of files are grouped and recorded for each folder, and plays back the data of the read file.
Folder acquisition means for acquiring all folders of the recording medium;
File number acquisition means for acquiring the number of files in the folder of all folders acquired by the folder acquisition means;
Reproduction order setting means for setting the reproduction order of each folder based on the number of files in each folder acquired by the file number acquisition means;
Reproduction means for reproducing the data of the plurality of files for each folder according to the reproduction order of each folder set by the reproduction order setting means.

  You may provide the memory | storage means for memorize | storing all the folders which the said folder acquisition means acquired, and the number of files in the folder of all the folders which the said file number acquisition means acquired.

A playback device according to a second aspect of the present invention provides:
In a playback device that reads the recorded information from a recording medium in which a plurality of recorded information is recorded in groups and recorded, and reproduces the read recorded information.
Group acquisition means for acquiring all groups of the recording medium;
Recording information number acquisition means for acquiring the number of recorded information in the group of all groups acquired by the group acquisition means,
Reproduction order setting means for setting the reproduction order of each group based on the number of recorded information in each group acquired by the recording information number acquisition means;
Reproduction means for reproducing the plurality of recorded information for each group according to the reproduction order of each group set by the reproduction order setting means.

A data reproducing method for a reproducing apparatus according to the third aspect of the present invention is as follows:
In a playback device that reads the data of the file from a recording medium in which a plurality of files are grouped and recorded for each folder, and plays back the data of the read file.
Obtaining all folders of the recording medium;
A step of acquiring the number of files in the folder of all acquired folders;
Setting the playback order of each folder based on the number of files in the acquired folder;
And reproducing the data of the plurality of files for each folder in accordance with the set reproduction order of the folders.

The program according to the fourth aspect of the present invention is:
On the computer,
A procedure for acquiring all folders from a recording medium on which a plurality of files are grouped and recorded for each folder.
Procedure to get the number of files in the folder of all the obtained folders,
Procedure to set the playback order of each folder based on the number of files in the acquired folder,
A procedure for reproducing the data of the plurality of files for each folder in accordance with the reproduction order of each set folder,
Is to execute.

  According to the present invention, information about groups can be easily grasped.

A playback apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows the configuration of a playback apparatus according to an embodiment of the present invention.
As shown in FIG. 1, the reproducing apparatus 100 includes a spindle motor 2, an optical pickup 3, a feed motor 4, a recording head 5, a head driver 6, an RF (Radio Frequency) amplifier 7, and a digital signal processing. The circuit 8 includes a system controller 9, an operation unit 10, a display unit 11, and a buffer memory 12.

The disc 1 is a mini-disc capable of rewriting recorded data. The disc 1 has recorded music data and the like as recorded data.
As shown in FIG. 2, the recording area of the disc 1 includes a lead-in area, a U-TOC (User's Table Of Contents) area, a program area, and a lead-out area.

The lead-in area is an area where data reading is started.
The U-TOC area is an area for recording information for managing music data recorded in the program area.
The program area is an area for recording music data such as music data.
The lead-out area is an area for ending data reading.
The group information is recorded in the U-TOC (or TOC) area together with the title data.

An example of group information recorded in the U-TOC area is shown in FIG.
In the U-TOC area, data related to group information is recorded in a format as shown in FIG. This data indicates the group information shown in FIG. That is, the group information includes a group number (group No), a group name, a track number (TNo), and an intra-group track number (GTNo).

  For example, in the case of the group No. 1, the group name is “Album1”, and the group No. 1 includes seven tracks. The music data is recorded for each track. TNos 1 to 7 are assigned to each track, and GT Nos. 1 to 7 are assigned to the tracks in the group, respectively. The start Tno is 1 and the end Tno is 7.

  Returning to FIG. 1, the spindle motor 2 is controlled by the digital signal processing circuit 8 to rotationally drive the disk 1 held by a turntable or a clamp mechanism at a predetermined rotational speed.

  The optical pickup 3 is for irradiating the disk 1 with laser light to enable recording / reproduction of recording data such as music data. More specifically, when recording data on the disk 1, the optical pickup 3 outputs a high level laser beam that heats the recording track of the disk 1 to the Curie temperature. The optical pickup 3 outputs a low-level laser beam that can detect a data signal by reflected light received using the magnetic Kerr effect when reproducing recorded data from the disk 1. The optical pickup 3 sends the detected data signal to the RF amplifier 7.

  The feed motor 4 is for moving the optical pickup 3 in the radial direction of the disk 1 under the control of the digital signal processing circuit 8.

  The recording head 5 is for writing data, and is disposed at a position facing the optical pickup 3 with the disk 1 interposed therebetween. The recording head 5 generates a magnetic field corresponding to the drive signal received from the head driver 6 and applies it to the disk 1. To do.

  The head driver 6 receives data encoded by the digital signal processing circuit 8 and generates a drive signal for driving the recording head 5, and supplies the generated drive signal to the recording head 5. To do.

  The RF amplifier 7 performs arithmetic processing based on the signal detected by the optical pickup 3, so that a reproduction RF signal that is a data signal, a tracking error (TE) signal, a focus error (FE) signal, and a disc 1 Groove information such as absolute position (ADIP: ADdress In Pregroove) information recorded as pregrooves is extracted. The RF amplifier 7 sends the extracted various signals and information to the digital signal processing circuit 8.

  The digital signal processing circuit 8 controls the feed motor 4 based on the signal extracted by the RF amplifier 7. The digital signal processing circuit 8 inputs music data from an ADC (Analog-to-Digital Converter) and performs encoding processing, and supplies the generated data to the head driver 6 or the RF amplifier 7. The signal is processed to reproduce music data, and the reproduced music data is output to a DAC (Digital-to-Analog Converter) or the like.

  The system controller 9 includes a microprocessor and controls the digital signal processing circuit 8, the operation unit 10, and the display unit 11.

  The operation unit 10 includes a push switch, a keypad, and the like, and is used for inputting instruction information for instructing start / stop of user data recording / reproduction to the system controller 9 by a user operation.

The display unit 11 is composed of an LCD (Liquid Crystal Display) panel or the like, and displays the reproduction time, track number, recording mode, level, number of songs in the group, and the like under the control of the system controller 9. The operation unit 10 includes a key for switching display of group information displayed on the display unit 11.
The buffer memory 12 is a memory composed of a semiconductor or the like, and stores group information read from the U-TOC area of the disk 1.

Next, the operation of the playback apparatus 100 according to this embodiment will be described.
When the disk 1 is mounted on a turntable or the like, the spindle motor 2 rotates the disk 1. When the disk 1 rotates, the system controller 9 instructs the digital signal processing circuit 8 to read the U-TOC information, and reads the U-TOC information from the U-TOC area of the disk 1. And the system controller 9 specifies the structure of the recording data of a user area based on the acquired U-TOC information.

  After that, when an instruction to start reproduction is input from the operation unit 10, the system controller 9 controls the operation of the digital signal processing circuit 8 according to the configuration of the recording data specified from the U-TOC information, Playback of the recorded data recorded on the disc 1 is started.

  The digital signal processing circuit 8 drives the spindle motor 2 to rotate the disk 1, and the feed motor 4 moves the optical pickup 3 to the recording data reading position. The optical pickup 3 irradiates the disk 1 with laser light, detects return light, converts it into an electrical signal, and sends it to the RF amplifier 7.

  The RF amplifier 7 performs arithmetic processing based on the signal received from the optical pickup 3 and extracts a reproduction RF signal, a tracking error signal, a focus error signal, and the like that are data signals. The RF amplifier 7 sends the extracted various signals to the digital signal processing circuit 8.

  The digital signal processing circuit 8 executes predetermined processing such as decoding of the signal received from the RF amplifier 7 and outputs the reproduced music data or the like to a DAC or the like as appropriate.

  Further, the system controller 9 executes a group information reading process according to the flowchart shown in FIG.

The system controller 9 determines from the read U-TOC information whether there is data relating to group information as shown in FIG. 3A (step S11).
If no data related to the group information is recorded, the system controller 9 terminates this process and performs normal control without displaying the number of songs in the group on the display unit 11.

When data related to group information is recorded, the system controller 9 reads this data (step S12), and extracts the group information shown in FIG. 3B from the read data according to a predetermined rule (step S13). ).
As described above, this group information includes a group number (group number), a group name, a track number (TNo), and an intra-group track number (GTNo).

  The system controller 9 acquires the group start Tno and end Tno from the extracted group information, and acquires the start and end name pointers (step S14).

  The system controller 9 writes the acquired information in the buffer memory 12 (step S15).

  Next, when the key data for requesting the number of songs to be displayed is input to the operation unit 10 during reproduction of the song data recorded on the disc 1 or during group search, the system controller 9 performs display processing according to the flowchart shown in FIG. Execute.

First, the system controller 9 reads group information and the like from the buffer memory 12 (step S16).
The system controller 9 analyzes the group information and obtains the number of songs in the group as group analysis information using the following mathematical formula 1 (step S17).
(Equation 1)
C = ETno- (STno-1)
ETno: End track number
STno: Start track number Then, the system controller 9 displays the obtained number of songs in the group on the display unit 11 (step S18).

Next, a display example will be described.
The display unit 11 displays the number of songs in the group obtained by the system controller 9 together with other group information.
For example, as shown in FIG. 6A, the display unit 11 displays the number of songs in the group together with the group number and the group name.

  When there is no group name, the display unit 11 displays the group number and the number of songs in the group as shown in FIG. When there is no group number, the display unit 11 displays the group name and the number of songs in the group as shown in FIG.

  Note that the key 10 a is a key provided in the operation unit 10, and is a key for scrolling the display of the group information displayed on the display unit 11. When the key 10a is pressed downward, the display unit 11 scrolls the display downward. The display order may be either ascending order or descending order. When the display order is ascending order, when the display is scrolled downward, the display unit 11 switches the display of the currently displayed group information to the display of the next group information. When the key 10a is pressed upward, the display unit 11 scrolls the display upward, and switches the currently displayed group information display to the previous group information display.

  As shown in FIG. 7A, the number of songs in the group can be displayed together with the group number, the group name, the track number in the group, and the track name. In this case, the track number in the group is displayed separately from the number of songs in the group without displaying the number of songs in the group in a fractional format.

  When there is no group name, the display unit 11 displays the group number, the number of songs in the group, the track number in the group, and the track name as shown in FIG. 7B.

  When there is no track name, the display unit 11 displays the group number, the group name, the number of songs in the group, and the track number in the group, as shown in FIG. 7C.

  When there is no group name and no track name, the display unit 11 displays the group number, the number of songs in the group, and the track number in the group, as shown in FIG.

  When the key 10a is pressed downward, the display unit 11 scrolls the display downward. When the key 10a is pressed upward, the display unit 11 scrolls the display upward.

  The number of songs in the group before and after and the group information can also be displayed. For example, as illustrated in FIG. 8A, the display unit 11 displays the front and rear group numbers, the front and rear group names, and the number of songs in the front and rear groups.

When there is no group name, the display unit 11 displays the front and rear group numbers and the number of songs in the front and rear groups as shown in FIG. When there is no group number, as shown in FIG. 8C, the display unit 11 displays the front and rear group names and the number of songs in the front and rear groups.
When the key 10a is pressed in the vertical direction, the display unit 11 scrolls the display in the vertical direction.

  As shown in FIG. 9A, the number of songs in a group can be displayed in a fractional format with the denominator of the track number in the group currently being reproduced.

  When there is no group name, the display unit 11 displays the group number, the track name, and the track number within the group / the number of songs within the group, as shown in FIG. 9B. When there is no group number, the display unit 11 displays the group name, the track name, and the track number within the group / the number of songs within the group, as shown in FIG. 9C. When there is no group name and no track name, the display unit 11 displays the group number and the track number within the group / the number of songs within the group, as shown in FIG.

  When the key 10a is pressed in the vertical direction, the display unit 11 scrolls the display in the vertical direction. Thus, when the number of songs in the group is displayed as a denominator, the number of remaining songs and the like can be easily grasped.

  As described above, according to the present embodiment, the number of songs in the group as a result of analyzing the group information is displayed during the reproduction of the song data or during the group search. It becomes easy.

  Also, when performing a group search, if the number of songs in the group is displayed, the group information can be easily obtained even if the user does not input the group title information or the like. Therefore, it is useful for group search and is very convenient.

  In addition, the group management function can be easily used by displaying the group number, the track number in the group, the group name, the number of songs in the group, and the like during playback.

  In carrying out the present invention, various forms are conceivable and the present invention is not limited to the above embodiment.

  The recording medium is not limited to the MD, and may be a CD (Compact Disk), a DVD (Digital Versatile Disk), or an MO (Magneto Optical disk).

  The group analysis information is not limited to the number of songs in the group, but may be, for example, the total playback time of the group, the remaining time, the number of groups, and the like.

  The number of songs in a group can be obtained when extracting group information. In this way, since the number of songs of all groups is known at the time of playback, the group playback order is set in the order of the number of songs or the number of songs in ascending order, and the song data is played in that playback order. The number of songs can be displayed.

This operation is shown in FIGS.
As shown in FIG. 10, the system controller 9 reads the U-TOC information, obtains the number of pieces of music when extracting group information (step S25), and stores the obtained number of pieces of music in the buffer memory 12 as the number of pieces of music information. Store it (step S26). Then, at the time of playback, as shown in FIG. 11, the system controller 9 sets the playback order of the groups in order from the largest number of songs or from the smallest number of songs (step S29), and for each group in the playback order. The music data is reproduced and the number of music obtained at the time of group information extraction is displayed (step S30).

  The present embodiment is also applicable to the case of playing music data in a PC (personal computer) format (for example, MP3: MPEG Audio Layer-3) that is stored in a solid medium, a disk medium, etc. and is composed of folders. Can be applied.

  The operation is shown in FIG. In this case, the system controller searches the medium (step S31), acquires the number of all folders in the medium (step S32), and acquires the number of files in the folder (step S33). Then, the acquired information is read into the buffer memory (step S34). In this way, such information can be read at any time. If there is a request for displaying the number of files (step S35), the system controller displays the number of files on the display unit (step S36).

  In addition, the computer can be read as a computer such as a flexible disk, a CD-ROM (Compact Disk Read-Only Memory), and a DVD for operating the computer as all or part of the playback apparatus or executing the above-described processing. The program may be stored and distributed in a recording medium, installed in a computer, operated as the above-described means, or the above-described steps may be executed.

It is a block diagram which shows the structure of the reproducing | regenerating apparatus concerning embodiment of this invention. It is explanatory drawing which shows the structure of the data recorded on the disk of FIG. It is explanatory drawing which shows the content of the group information currently recorded on the U-TOC area | region. 3 is a flowchart showing a group information reading process of the system controller of FIG. 1. 3 is a flowchart showing group information display processing of the system controller of FIG. 1. It is explanatory drawing which shows the example 1 of a display. It is explanatory drawing which shows the example 2 of a display. It is explanatory drawing which shows the example 3 of a display. It is explanatory drawing which shows the example 4 of a display. It is a flowchart which shows the reading process of another group information of the system controller of FIG. It is a flowchart which shows the display process of another group information of the system controller of FIG. It is a flowchart which shows the process in the case of reproducing | regenerating PC format music data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc 2 Spindle motor 3 Optical pick-up 4 Feed motor 5 Recording head 6 Head driver 7 RF amplifier 8 Digital signal processing circuit 9 System controller 10 Operation part 11 Display part 100 Playback apparatus

Claims (5)

In a playback device that reads the data of the file from a recording medium in which a plurality of files are grouped and recorded for each folder, and plays back the data of the read file.
Folder acquisition means for acquiring all folders of the recording medium;
File number acquisition means for acquiring the number of files in the folder of all folders acquired by the folder acquisition means;
Reproduction order setting means for setting the reproduction order of each folder based on the number of files in each folder acquired by the file number acquisition means;
Reproducing means for reproducing the data of the plurality of files for each folder according to the reproduction order of each folder set by the reproduction order setting means,
A reproducing apparatus characterized by that. A storage means for storing all the folders acquired by the folder acquisition means and the number of files in the folder of all folders acquired by the file number acquisition means;
The reproducing apparatus according to claim 1. In a playback device that reads the recorded information from a recording medium in which a plurality of recorded information is recorded in groups and recorded, and reproduces the read recorded information.
Group acquisition means for acquiring all groups of the recording medium;
Recording information number acquisition means for acquiring the number of recorded information in the group of all groups acquired by the group acquisition means,
Reproduction order setting means for setting the reproduction order of each group based on the number of recorded information in each group acquired by the recording information number acquisition means;
Playback means for playing back the plurality of recorded information for each group according to the playback order of each group set by the playback order setting means,
A reproducing apparatus characterized by that. In a playback device that reads the data of the file from a recording medium in which a plurality of files are grouped and recorded for each folder, and plays back the data of the read file.
Obtaining all folders of the recording medium;
A step of acquiring the number of files in the folder of all acquired folders;
Setting the playback order of each folder based on the number of files in the acquired folder;
Replaying the data of the plurality of files for each folder according to the set reproduction order of each folder,
A data reproducing method for a reproducing apparatus. On the computer,
A procedure for acquiring all folders from a recording medium on which a plurality of files are grouped and recorded for each folder.
Procedure to get the number of files in the folder of all the obtained folders,
Procedure to set the playback order of each folder based on the number of files in the acquired folder,
A procedure for reproducing the data of the plurality of files for each folder in accordance with the reproduction order of each set folder,
A program for running

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