JP3944817B2 - Disc playback apparatus and disc playback method used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc playback apparatus for playing back a disc in which one or a plurality of directories storing data such as compressed audio data are recorded, and particularly to easily select a target directory (a directory desired to be selected). The present invention relates to a disc playback apparatus with an improved directory selection method.
[0002]
[Prior art]
As a recording medium on which music information (audio data) is recorded, a compact disc (CD) is widely used. As discs based on the CD standard, CD-Rs that can be recorded only once and CD-RWs that can be rewritten a plurality of times have appeared and are becoming popular. As another disk based on the CD standard, there is a CD-ROM used as a read-only memory (ROM) of a computer. As described above, various discs such as a writable disc have appeared as CD-compliant discs as well as a reproduction-only disc on which music information is recorded.
[0003]
By the way, in recent years, with the advancement of data compression technology, along with the widespread use of personal computers (personal computers), audio data is compressed using a personal computer, and the compressed data is converted into a CD-R or CD-RW in a CD-ROM format. It has come to be recorded in. Note that a method called MP3 (MPEG1 audio layer 3) is known as a method for compressing audio data. Although it depends on the compression method, by compressing the audio data, for example, about 10 CDs (album) containing about 10 songs can be recorded on one CD-R and CD-RW.
[0004]
Here, a general method for recording the compressed audio data on the CD-R and CD-RW in the CD-ROM format will be described with reference to FIGS. In FIG. 7, a display 2 and a keyboard 3 are connected to the personal computer 1. The illustration of the mouse is omitted. By starting the CD-R writing software by the personal computer 1, the compressed audio data can be written to the CD-R or CD-RW in the CD-ROM format.
[0005]
FIG. 8 shows an example of the structure of a directory for storing compressed audio data. As shown in FIG. 8, a directory D1 having a directory name ABC, a directory D2 having a directory name DEF, and a directory D3 having a directory name XYZ are hung from the root directory Dr. Here, an example is shown in which three directories are hung in one hierarchy in the root directory Dr. However, more directories may be hung and a plurality of hierarchies may be formed.
[0006]
[Problems to be solved by the invention]
To load a conventional disc player with a disc on which a plurality of directories are recorded as shown in FIG. 8 and reproduce desired audio data, the directory structure is displayed on a display unit such as a liquid crystal display unit, and a cursor is displayed. It was necessary to select a target directory by operating keys and the like. When the number of directories is large or the directory structure is complicated, there are problems that it takes a lot of operations and a lot of time to select a target directory. In particular, in the case where the disc playback apparatus is a car audio, it is not preferable that it takes a large number of operations and a lot of time to select a target directory, and an improvement is required.
[0007]
The present invention has been made in view of such problems, and an object of the present invention is to provide a disc reproducing apparatus capable of easily selecting a target directory.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems of the prior art, the present invention provides a disk reproducing apparatus for reproducing a disk in which one or a plurality of directories storing data is reproduced, and an operation unit having a numeric keypad and a directory structure of the disk. Analysis means for analyzing, and first determination means for determining whether there is a directory having a predetermined number of digits at a predetermined position as a directory name of the directory based on an analysis result by the analyzing means And when the first determination means determines that there is a directory having a predetermined number of digits at a predetermined position as a directory name of the directory, a predetermined number of digits is set at a predetermined position. directory hand made to correspond to the directory as the address of the directory of the directory name with And creation means for creating a table, a storage means for storing the directory table in the storage unit, when a predetermined number of digits the predetermined by the ten-key is input, by searching the directory table, the a second determination means for determining whether there is a directory containing a number that matches the predetermined said predetermined number of predetermined digits to the position of the directory of the directory name, by the second determination means A disc playback apparatus comprising playback means for playing back data stored in the directory when it is determined that there is a directory containing a number that matches a predetermined number of predetermined digits. I will provide a.
Further, in a disc playback method used in a disc playback apparatus for playing back a disc in which one or more directories storing data are recorded, an analysis step for analyzing a directory structure of the disc inserted in the disc playback apparatus, and the analysis A first determination step for determining whether or not there is a directory having a predetermined number of digits at a predetermined position as a directory name of the directory based on the analysis result of the step; and the first determination step If it is determined that there is a directory having a predetermined number of digits at a predetermined position as the directory name of the directory, a directory with a directory number having a predetermined number of digits at a predetermined position and its directory A directory table corresponding to the directory address A creation step of creating a le, If the storage step of storing the directory table in the storage unit, the predetermined prescribed number of digits by the operation unit of the disc reproducing apparatus is input, searches the directory table it makes a second determination step of determining whether there is a directory containing a number that matches a predetermined number of said predetermined number of digits in said predetermined position of the directory name of the directory, the second If it is determined in the determining step that there is a directory including a number that matches the predetermined number of predetermined digits, an acquisition step for acquiring the address of the directory, and a pickup for playing the disc Move step to move to the position corresponding to the directory of the address acquired in the acquisition step If, to provide a disc reproducing method which comprises a reproduction step of reproducing the data stored in the directory address that has moved in the moving step.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a disc reproducing apparatus according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of the disk reproducing apparatus of the present invention, FIGS. 2 and 3 are flowcharts for explaining the operation of the disk reproducing apparatus of the present invention, and FIG. 4 is used in the disk reproducing apparatus of the present invention. FIG. 5 is a diagram showing an example of a directory table, FIG. 5 is a diagram showing an example of a directory structure of a disc played by the disc playback device of the present invention, and FIG. 6 is a diagram showing an example of a data structure of a disc played by the disc playback device of the present invention. is there.
[0010]
In FIG. 1, a disc 11 is one in which compressed audio data is recorded in a CD-ROM format on a writable disc such as a CD-R or CD-RW as described in FIG. The disk 11 is not limited to CD-R or CD-RW, and the data recorded on the disk 11 is not limited to compressed audio data. As described with reference to FIG. 8, the disk 11 may be one in which one or a plurality of directories storing data are recorded.
[0011]
As a condition for applying the present invention, it is assumed that the name of the directory recorded on the disk 11 includes a number. When the directory structure and directory name are as shown in FIG. 8, that is, the directory D1 with the directory name ABC, the directory D2 with the directory name DEF, and the directory D3 with the directory name XYZ are hung in the root directory Dr. In this case, as shown in FIG. 5, for example, one or more digits are added to the head of each directory name. In FIG. 7, the directory name is changed by the keyboard 3, and the data is written in the CD-R or CD-RW after the directory name as shown in FIG.
[0012]
In the directory structure of FIG. 5 changed to a directory name including numbers, the compressed audio data stored in each directory is the same as in FIG. 8, but for the sake of distinction, the directory with the directory name of 01ABC is the directory of D10, 02DEF. The directory with the name “D20” and the directory with the directory name “03XYZ” will be called “D30”. In the present embodiment, the beginning of the directory name is a number, but the present invention is not limited to this, and it may be the end and the number of digits is arbitrary. However, the position and number of digits in the directory name are determined in advance.
[0013]
Since the disk 11 is recorded with compressed audio data in the CD-ROM format, its data structure is as shown in FIG. The disk 11 includes a path table 11a indicating the hierarchical structure of the directory structure, a directory code 11b indicating the address of each directory, and compressed audio that is actual data stored in each directory. Data 11c.
[0014]
Returning to FIG. 1, the disk 11 is rotated by the drive mechanism 12. The optical pickup PU can read information recorded on the disk 11 by irradiating the disk 11 with laser light and detecting the reflected light. The drive mechanism unit 12 controls the radial position of the optical pickup PU with respect to the disk 11 and the irradiation position of the laser beam under the control of the servo control unit 13. Information (data) read from the disk 11 is input to the CD-ROM decoder 14 via the servo control unit 13 and decoded.
[0015]
Data decoded by the CD-ROM decoder 14 is input to a microcomputer 15 and a directory analysis process described later is performed. The microcomputer 15 includes a random access memory (RAM) 16. The RAM 16 may be externally attached to the microcomputer 15. Of the data recorded on the disk 11, the compressed audio data is input to the compressed audio decoder 18 and decoded. The microcomputer 15 controls the servo control unit 13, the CD-ROM decoder 14, and the compressed audio decoder 18.
[0016]
The microcomputer 15 is supplied with operation signals from an operation unit 17 having various keys (buttons) including at least a numeric keypad. The operation unit 17 may be provided in the apparatus main body, or may be a remote control transmitter.
[0017]
The compressed audio data decoded by the compressed audio decoder 18, that is, the audio data that has been decompressed and decompressed is input to the D / A converter 19 and converted into an analog signal. This analog signal is amplified by the amplifier 20 and emitted by the speaker 21. Here, only one speaker 21 is shown, but a plurality of speakers may be used.
[0018]
Here, the directory analysis processing performed by the microcomputer 15 will be described with reference to FIG. In FIG. 2, it is determined in step S1 whether or not a CD (including the disk 11) has been inserted. Various specific methods for determining whether or not a CD has been inserted are known. If the CD has been inserted, the process proceeds to step S2, and if not, the process ends. In step S2, the directory structure is analyzed by referring to the path table 11a described in FIG.
[0019]
In step S3, it is determined whether there is a directory numbered as the directory name. In this embodiment, it is determined whether the first two digits of the directory name are numbers. If there is a numbered directory, the process proceeds to step S4, and if not, the process proceeds to step S5. In step S4, a directory table to be described later is created, and the process proceeds to step S5. In step S5, it is determined whether or not analysis of all directories has been completed. If completed, the process proceeds to step S6, and if not completed, the process returns to step S2. In step S6, directory search processing is performed by inputting a numeric keypad, and the process ends.
[0020]
FIG. 4 is an example of the directory table created in step S4. If there is a numbered directory, the microcomputer 15 refers to the directory code 11b described with reference to FIG. 6 to obtain the address of each directory. Then, as shown in FIG. 4, the microcomputer 15 creates a table in which each directory and address are associated with each other and writes the table in the RAM 16.
[0021]
Next, referring to FIG. 3, a specific example of the directory search process by the numeric key input in step S6 of FIG. 2 will be described. In FIG. 3, the microcomputer 15 determines whether or not the numeric keypad of the operation unit 17 is input in step S61. If the numeric key is entered, the process proceeds to step S62, and if not entered, the process ends. In step S62, the directory table written in the RAM 16 is searched. In step S63, it is determined whether there is a directory including a number that matches the input number.
[0022]
If there is a matching directory, the address of the directory is acquired in step S64, and if there is no matching directory, the process ends. In step S65, the irradiation position of the laser beam from the optical pickup PU is moved to a position corresponding to the directory of the address acquired in step S64. In step S66, it is determined whether or not there is actually compressed audio data in the directory. If there is compressed audio data, in step S67, the compressed audio data is reproduced and the process ends. If there is no compressed audio data, the process ends.
[0023]
Although step S66 is not necessarily a necessary process, it may be preferable to provide the process of step S66 because compressed audio data may not actually be stored in the directory. By providing step S66, it is possible to eliminate the useless operation of moving to the reproduction processing of the compressed audio data in step S67 even though there is no compressed audio data.
[0024]
【The invention's effect】
As described above in detail, the disc reproducing apparatus of the present invention has an operation unit having a numeric keypad and a directory that matches the numeric value as at least a part of the directory name of the directory when a numeric value is input by the numeric keypad. And a reproducing unit that reproduces data stored in the directory when the determining unit determines that there is a directory that matches the number. Can be easily selected.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a flowchart for explaining the operation of the present invention.
FIG. 3 is a flowchart for explaining the operation of the present invention.
FIG. 4 is a diagram showing an example of a directory table used in the present invention.
FIG. 5 is a diagram showing an example of a directory structure of a disc to be reproduced according to the present invention.
FIG. 6 is a diagram showing an example of the data structure of a disc played according to the present invention.
FIG. 7 is a diagram illustrating a configuration example for recording compressed audio data on a CD-R and CD-RW in a CD-ROM format.
FIG. 8 is a diagram showing an example of the structure of a directory for storing compressed audio data.
[Explanation of symbols]
11 Disk 12 Drive mechanism section 13 Servo control section 14 CD-ROM decoder 15 Microcomputer 16 Random access memory (storage section)
17 Operation Unit 18 Compressed Audio Decoder 19 D / A Converter 20 Amplifier 21 Speaker

Claims (5)

In a disc playback apparatus for playing back a disc on which one or more directories storing data are recorded,
An operation unit having a numeric keypad;
Analyzing means for analyzing the directory structure of the disk;
First determination means for determining whether there is a directory having a predetermined number of digits at a predetermined position as a directory name of the directory , based on an analysis result by the analysis means;
If it is determined by the first determination means that there is a directory having a predetermined number of digits at a predetermined position as a directory name of the directory, a directory having a predetermined number of digits at a predetermined position Creating means for creating a directory table in which a directory of a name and an address of the directory are associated with each other;
Storage means for storing the directory table in a storage unit;
When a predetermined number of digits the predetermined by the ten-key is input, by searching the directory table, a predetermined number of said predetermined number of digits in said predetermined position of the directory name of the directory Second determination means for determining whether there is a directory including a number that matches
When the second determining means determines that there is a directory that includes a number that matches the predetermined number of digits, the reproducing means for reproducing the data stored in the directory is provided. A disc player characterized by the above.   2. The disk reproducing apparatus according to claim 1, wherein the disk is a CD-R or CD-RW in which compressed audio data is recorded as the data in a CD-ROM format. In a disc playback method used in a disc playback apparatus for playing back a disc in which one or more directories storing data are recorded,
An analysis step of analyzing a directory structure of the disc inserted in the disc playback device;
A first determination step of determining whether or not there is a directory having a predetermined number of digits at a predetermined position as a directory name of the directory based on an analysis result of the analysis step ;
If it is determined in the first determination step that there is a directory having a predetermined number of digits at a predetermined position as the directory name of the directory, a predetermined number of digits is provided at a predetermined position. A creation step for creating a directory table in which a directory of a directory name is associated with an address of the directory;
A storage step of storing the directory table in a storage unit;
When the disk reproducing said predetermined number of digits given numerical by the operation unit of the apparatus is inputted, by searching the directory table, the number of digits the predetermined said predetermined position of the directory name of the directory A second determination step of determining whether there is a directory including a number that matches the predetermined number of
If it is determined in the second determination step that there is a directory including a number that matches a predetermined number of the predetermined number of digits, an acquisition step of acquiring an address of the directory;
A moving step of moving a pickup for playing the disc to a position corresponding to the directory of the address acquired in the acquiring step;
And a reproducing step of reproducing data stored in the directory of the address moved in the moving step. A third determination step for determining whether or not data to be reproduced is stored in the directory at the address acquired in the acquisition step between the movement step and the reproduction step;
4. The disk reproducing method according to claim 3, wherein the reproducing step executes the data reproducing process when it is determined that the data to be reproduced is stored in the third determining step. The first and second determining steps determine whether or not there is a directory including a number that matches a predetermined number of the predetermined number of digits at the head of the directory name of the directory. Item 5. The disk playback method according to Item 3 or 4.

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