JPH1027414A - Information reproducing system for dealing with a plurality of kinds of information transmitting media - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily discriminate whether a set disk is an SD or a CD by automatically detecting the kind of the set disk, based on information recorded on the disk. SOLUTION: When an optical disk 10 is set in a reproducing device, 'the set disk is an SD type optical disk' is assumed for the time being by a system CPU part 50 (setting default of the system). Then, an optical head (not shown in the figure) of a disk drive part 30 is operated to start focusing and track search from an innermost circumferential read-in area of the disk 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a device (compatible optical disk player) capable of reproducing a plurality of types of optical disks.

[0002]

2. Description of the Related Art Currently, digital audio compact disks (hereinafter abbreviated as CDs) having a diameter of 8 cm or 12 cm and analog video laser disks (hereinafter abbreviated as LDs) having a diameter of 20 cm or 30 cm are used as audio / video information recording media. Is abbreviated in the market).

A plurality of subcodes (P, Q, R to W channels) based on the CD format are recorded on a CD. In this subcode, the Q channel contains an address, and in a CD, this address always contains "1" (such as 4-bit 0001). For example, by detecting the Q channel address “1”, it can be determined that the optical disk set in the reproducing apparatus is a CD.

[0004] For the LD, the disk size is 12c.
Whether the disc is larger than m (the disc diameter is 20 cm or more) is determined using a sensor provided in the reproducing apparatus. Since there is no CD larger than 12 cm, the LD can be identified with such a sensor.

[0005]

In addition to the above-mentioned CD and LD, a high-density disk (superdensity) capable of recording moving images and a plurality of audio data based on the MPEG2 (Moving Picture Experts Group 2) standard has recently been added. -Disk; abbreviated as SD hereinafter) has been developed.

[0006] This SD is an optical disk similar to a CD, and is very similar in appearance (there is a difference between a lamination type and a single plate type, but it is difficult for an unfamiliar user to recognize it). If the size of the SD is 8 cm or 12 cm as in the case of a CD, an unfamiliar user may not be able to know what kind of disc has been set in the disc reproducing apparatus. In such a case, the user removes the disc from the playback device, reads the label of the disc to confirm whether the disc is an SD or a CD, sets the disc again in the apparatus, and performs a device operation corresponding to the type of the disc. , To start playback. However, this can be a troublesome task for the user.

An object of the present invention is to provide an SD / CD compatible reproducing apparatus capable of reproducing a CD, for example, a method and apparatus for allowing a user to easily confirm whether a disc currently set in the reproducing apparatus is an SD or a CD. And to provide a system.

[0008]

In order to achieve the above object, a reproducing method according to the present invention uses an information transmission method (SD format or CD format, LD format, BS or CS digital broadcasting
First identification information (for example, “SD001” or “VIDEO_T”) that specifies the format or not.
S. INF ") and a second signal (CD reproduction signal) including second identification information (for example, subcode Q) specifying an information transmission method. In what can be taken out ("S
D001 ”or“ VIDEO_TS.INF ”and the subcode Q can be indirectly determined to be LD or BS / CS if neither subcode Q is detected) and the first identification information (“ SD
001 ”or“ VIDEO_TS.INF ”) to detect information from the first signal (SD reproduction signal) (YES in ST14, ST1).
6); the second identification information (subcode Q) is detected, and the information transmission amount per unit time is reduced by the first signal (S
D playback signal; second data indicating that information is extracted from the second signal (CD playback signal; average data rate of about 1.4 Mbps for a video CD, lower than that for a music CD) different from the average data rate of about 4.8 Mbps Step (ST
14 No, ST24 Yes, ST26); corresponding to the detection result of the first step or the second step (ST16 or ST26), the first signal (SD reproduction signal) having a relatively large information transmission amount or Three steps (ST30) of reproducing information included in a second signal (CD reproduction signal) having a relatively small information transmission amount.

In order to achieve the above object, a reproducing apparatus according to the present invention provides first identification information (for example, "") for specifying one of optical discs (SD, CD, LD) as a plurality of types of information recording media. SD001 ”or“ VID
EO_TS.INF "), the first optical disc (S
D) a second optical disc (CD) including second identification information (subcode Q) for specifying another one of the optical discs,
In the case where information can be taken out from either the first optical disc (SD) or the third optical disc (LD) which is not the second optical disc (CD), the first identification information ("SD001" or "VI
DEO_TS.INF ") to indicate that information is to be reproduced from the first information recording medium (SD).
Display means (54, 110; ST10 to ST14 yes,
ST16); second display means (54, 110; ST1) for detecting the second identification information (subcode Q) and displaying that information is reproduced from the second optical disc (CD).
4 NO, ST22 to ST24 YES, ST26); and a second display which detects a physical characteristic (for example, a diameter) of the third optical disc (LD) and indicates that information is reproduced from the third optical disc (LD). 3 display means (54, 11
0; ST18 YES, ST20); and the detection result (ST) of the first display means, the second display means or the third display means.
16, ST26, or ST20), the first optical disk (SD), the second optical disk (CD),
Or, a reproduction processing means (54 to 64; ST30) for reproducing the information contained in the third optical disk (LD).

[0010] In order to achieve the above object, the reproducing system of the present invention provides first identification information (for example, volume management) for specifying an information recording format (SD format, CD format, or LD format). From the first signal (SD reproduction signal) including the information SD001) and the second signal (CD reproduction signal) including the second identification information (for example, the subcode Q) for specifying the information recording format. In which information can be extracted, the first
Upon detecting the identification information (SD001), the first signal (S
First means (ST14 YES, ST16) for extracting information from the D reproduction signal); detecting the second identification information (subcode Q), and changing the information transmission amount per unit time to the first signal (SD reproduction). Signal; average data rate about 4.8M
second means (ST14 NO, ST24 YES, ST24) for extracting information from the second signal (CD reproduction signal; average data rate of a video CD of about 1.4 Mbps) different from the second signal (STPS No.
ST26); corresponding to the detection result (ST16 or ST26) of the first means or the second means, the first signal (SD reproduction signal) having a relatively large information transmission amount or the relative information transmission amount. And third means (ST30) for reproducing information contained in a small second signal (CD reproduction signal).

Further, in order to achieve the above object, an information receiving system of the present invention specifies an information transmission method (SD format digital broadcast, A mode, B mode, or CD format digital broadcast). A first transmission signal (SD digital broadcast signal) including the first identification information (SD001 in the volume management information in the case of digital broadcasting in the SD format), and a second transmission signal (A mode) not including the first identification information , B mode, or CD format digital broadcast signal), the first identification information (SD00
1) detecting the first transmission signal (SD digital broadcast signal) and indicating that the first transmission signal (SD digital broadcast signal) has been received; (ST14 YES, ST16); and the first transmission signal (SD digital broadcast signal) or The second transmission signal (A mode, B
Mode or CD broadcast digital broadcast signal)
If the first identification information (SD001) is not detected when is received, the second transmission signal (A mode, B mode
Mode or CD broadcast digital broadcast signal)
Means (ST14 No, ST14) indicating that
24 Yes, ST26); corresponding to the detection result (ST16 or ST26) of the first means or the second means,
Third means (ST30) for reproducing information included in the first transmission signal (SD digital broadcast signal) or the second transmission signal (A mode, B mode, or CD format digital broadcast signal). ing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an information reproducing system according to an embodiment of the present invention will be described with reference to the drawings. In order to avoid redundant description, common reference numerals are used for functionally common parts in a plurality of drawings.

FIG. 1 is a block diagram illustrating the configuration of an information reproducing system (SD / CD / LD compatible optical disk reproducing apparatus) according to an embodiment of the present invention.

As shown in FIG. 1, the optical disk reproducing apparatus includes a key operation and display unit 4, an optical disk drive unit 3
0, system CPU unit 50, system ROM & RAM unit 52, data RAM unit 56, system processor unit 5
4, video decoder unit 58, audio decoder unit 6
0, sub-picture decoder 62, D / A & playback processor 64,
It comprises a monitor section 6, a speaker section 8, and the like.

The disc drive unit 30 determines whether the set optical disc is a type of 12 cm or less (SD or CD) or a type of 20 cm or more (LD).
It has a disk size sensor DSS that physically determines based on the disk diameter.

In this optical disk reproducing apparatus, when a reproduction instruction is input from the key operation & display unit 4, the system CPU unit 50 sends the target address (the head of the program to be reproduced) to the optical disk drive unit 30. Address) and a read command. The optical disk drive unit 30 drives the optical disk 10 to rotate in accordance with the received read command, reads data at a target address from the optical disk 10, and sends the read data to the system processor unit 54.

The system processor 54 temporarily stores the transmitted data in the data RAM 56, and determines the type of data (video, audio, sub-picture) based on the header information added to the data. Then, the data is transferred to the decoder section (58 to 62) corresponding to the determined type.

Each of the decoders (58 to 62) decodes the data according to the respective data format, and sends the decoding result to the D / A & reproduction processor 64. D
The / A & reproduction processing section 64 converts the decoded result (digital signal) into an analog signal, performs mixing processing and the like, and processes the processed analog signal (video signal and / or audio signal) monitor section 6 and / or speaker section Send to 8.

Although the appearance is similar between SD and CD,
The recording track pitch, the average data rate of the reproduced signal, the recorded content (format), etc., are greatly different, and the servo operation of the reproducing device is also different. If the type of the disc (or format) to be reproduced is not detected first, Playback processing (playback of recorded programs) cannot be performed. The present invention is to automatically detect the type of a disc to be reproduced.

FIG. 2 is a block diagram illustrating the configuration of an information reproducing system (digital receiver for receiving digital broadcasts in a plurality of formats) according to another embodiment of the present invention.

The apparatus shown in FIG. 1 has a disk drive unit 30 for reproducing optical disks of a plurality of formats.
In the apparatus shown in FIG. 2, a digital receiver (for example, a satellite broadcast tuner section) 3 for receiving digital broadcasts in a plurality of formats
0X. In FIG. 2, the receiver (tuner) 3
Except for 0X, it has the same functional configuration as FIG. Therefore, by describing the disk drive unit 30 and subsequent parts of FIG. 1, the description of the receiver 30X and subsequent parts of FIG. 2 will be omitted.

An optical disk (SD disk) 10 reproduced by the optical disk reproducing apparatus shown in FIG.
Various data such as a G-compressed moving image, audio, and sub-video are recorded in a data format corresponding to the MPEG2 system layer. Here, the sub-picture is data obtained by performing run-length compression of text and simple animation data.

In the optical disk reproducing apparatus of FIG. 1, recording data, that is, video data, sub-video data and audio data are reproduced from the optical disk 10 by the user operating the key operation / display section 4, and the audio data is reproduced in the apparatus. The signal is converted into a signal and a video signal and reproduced as video and audio by the monitor unit 6 and the speaker unit 8 outside the device. The key operation / display unit 4 plays, stops, fast-forwards, rewinds, and subtitles (sub-picture) the optical disc 10
Display presence / absence, parental control (restriction on playback or not)
Is used for the user to perform various instruction operations, such as canceling of channel, channel selection, menu selection, and the like. (In the case of the apparatus shown in FIG. 2, the broadcast reception channel is switched and selected by a user operation from the key operation / display unit 4.) Here, the parental control is recorded on the optical disk (SD disk) 10. This refers to the restriction of viewing of video, audio, text (subtitles), etc. depending on the country, religion, age, etc. This parental control is performed on the optical disk 10
It is executed based on parental information described in the parentheses (or parental information in a broadcast digital signal).

A character or a simple animation is composed of a bitmap image that is run-length compressed based on the SD format, and is treated as a sub-picture.

FIG. 3 schematically shows the physical structure of an ultra-high density optical disc (SD) reproduced by the apparatus shown in FIG. (When a digital signal reproduced from this SD disk is broadcast, it is received by the apparatus shown in FIG. 2.) The SD disk 10 has a recording layer on a transparent substrate (polycarbonate or the like) 14 as shown in FIG. (Light reflection layer) 16
Is formed of a pair of structures 18 formed with a. The pair of structures 18 are bonded via an adhesive layer 20 so that the recording layer 16 is sealed therein.

In the center of the optical disk 10, a spindle motor (not shown) of the disk drive unit 30 is provided.
A center hole 22 into which the spindle is inserted is provided. Around the center hole 22, a clamping area 24 for holding the optical disk 10 during rotation is provided.

From the clamping area 24 to the outer peripheral edge of the optical disk 10, an information recording area 25 in which information can be recorded on the optical disk 10 is defined. In the bonded optical disk shown in FIG.
You can have five.

In the outer peripheral area of each information recording area 25, there is provided a lead-out area 26 in which information is not normally recorded. In the inner peripheral area adjacent to the clamping area 24, similarly, information is normally stored. A lead-in area 27 that is not recorded is provided. These lead-out areas 26
A data recording area 28 is defined between the data recording area 28 and the lead-in area 27.

FIG. 4 is a diagram for explaining the data recording configuration of the SD type optical disk 10. As shown in FIG. Usually, the recording layer 16 of the information recording area 25 is an area where data is recorded,
The tracks are formed continuously in a spiral (or concentric) manner. As shown in FIG. 4, the continuous track is divided into a plurality of logical sectors (minimum recording units) having a fixed storage capacity, and data is recorded based on the logical sectors. (In the case of the broadcast receiving system of FIG. 2, the serial data of the recording track information from the lead-in area to the lead-out area of FIG. 4 is carried on the broadcast radio wave.) The recording capacity of this one logical sector Is set to 2048 bytes, which is the same as the one-pack data length described later. The data recording area 28 of the information recording area 25 is an actual data recording area, in which management data, main image (main video) data, sub-image (sub-video) data, and audio (audio) data, which will be described later, are similarly stored. It is recorded as a change in the physical state of a pit or the like.

A read-only ultra-high density optical disk (Supe
In a Density ROM disk (SDROM) 10, a pit row is formed in advance on a transparent substrate 14 by a stamper, and a reflection layer is formed by vapor deposition or sputtering on the surface of the transparent substrate 14 on which the pit row is formed, and the reflection layer is formed. It is formed as a recording layer 14. Normally, in this read-only optical disk 10, no groove is provided as a track, and a pit row is defined as a track.

FIG. 5 is a diagram for explaining the recording data structure of the SD disk 10 used in the present invention.

The data recording area 28 from the lead-in area 27 to the lead-out area 26 of the optical disk 10 shown in FIG.
It has a volume structure as shown in FIG. This volume structure includes a volume management information area 70 and a file area 80 having a hierarchical structure.

The data recorded on the optical disc 10 is roughly composed of volume management information 74 and three types of files. The three types of files are a movie file (a file containing both video data and audio data) 78, a music file (a file containing only audio data) 78, and disk information on which the configuration contents and menu information are recorded File 76.

The volume management information area 70 corresponds to, for example, logical block numbers 0 to 23 defined in accordance with ISO9660, and is assigned a system area 72 and a volume management area 74.

Although the contents of the system area 72 are not normally defined as empty areas, for example, the optical disk 10
Is provided for editors who edit the data to be recorded in
A system program for realizing the drive of the optical disk device according to the editor's intention is stored as needed.

In the volume management area 74, volume management information (hereinafter, simply referred to as a disk information file 76) of a file area 80, a file 78 such as a movie file or a music file, is managed. That is, information for managing recording positions, recording capacities, and file names of all files) is stored.

In the file area 80, for example, files 76 from file number 0 to file number 99 designated by logical block numbers 24 and subsequent logical block numbers are stored.
And 78 are arranged, and file 76 of file number 0
Are assigned as disc information files 76, and files 78 from file number 1 to file number 99 are assigned as movie files (that is, video files or music files).

FIG. 6 illustrates the logical structure of the lead-in area 27 of the SD disk 10 used in the present invention. When the disc 10 is set in the reproducing apparatus of FIG.
An optical pickup (not shown) starts reading from the lead-in area 27. If a reference code for two blocks is found while reading the code (continuous 00h) in the lead-in area 27, the system CPU unit 50 of the playback device uses the reference code reading position as a reference. Based on the disc specification, the control data and the start position of the data area that come thereafter are known.

FIG. 7 is a diagram for explaining the structure of the volume management information 74 of the SD disk 10 used in the present invention. The volume management information 74 of the disk 10 based on the SD format includes a basic volume descriptor (Primary
Volume Descriptor (hereinafter abbreviated as PVD as appropriate).

The PVD includes a standard identifier (CD001) as appropriate in addition to information such as a volume descriptor type and a directory record for a root directory of a management file.
And / or an extended system identifier (SD001). When the PVD includes the identifier “CD001”, it is possible to determine that the disk 10 is an optical disk based on the CD format by detecting the “CD001”. This PVD is the identifier “SD001”
When the “SD001” is included, it is possible to determine that the disk 10 is an optical disk based on the SD format by detecting “SD001”.

The disc determination when there is the identifier "CD001" but not the identifier "SD001" can be executed in accordance with the procedures shown in FIGS. Identifier "SD00"
The disc determination when there is "1" but no identifier "CD001" can be executed in accordance with the procedures shown in FIGS.

FIGS. 8 and 9 are flow charts for explaining the operation of the multiple recording medium (SD / CD / LD) compatible reproducing apparatus according to the first embodiment of the present invention.
In this embodiment, 12
It is assumed that the cm optical disk 10 includes the identifier “CD001”.

When the optical disk 10 is set in the reproducing apparatus shown in FIG. 1, the system CPU unit 50 assumes for the time being that "the set disk is an SD type optical disk" (system default setting). Then, the optical head (not shown) of the disk drive unit 30 starts focusing and track search from the innermost peripheral lead-in area 27 of the disk 10 (step ST1).
00).

During reading of the disk 10, the reference code (sector number 02F000h) of the lead-in area 27 is read.
From the system CPU unit 5).
0 recognizes the start sector (030000h) of the data area 28 from the reading position (02F000h) (step ST102).

In this embodiment, the start position of the data area being 030000h is one of the conditions for judging that the set optical disk 10 is an SD standard disk. That is, the sector number 030000
If the optical head moves to h and some data read from it is 00h continuous, the loaded disc 1
0 is not an SD disk (step ST1).
04 No). In this case, the node A connected to the flow of FIG.
Jump to

If the optical head moves to the sector number 030000h and the data read therefrom is data other than the continuous 00h (No in step ST104), for example, the sector number 030010h is accessed (step ST104).
106), the basic volume descriptor (PVD in FIG. 7) inside the volume management information 74 in FIG. 5 is read.

In the read PVD, the standard ISO 96
If there is no identifier “CD001” compliant with No. 60 (No in step ST108), the process jumps to the node A. If the read PVD contains the identifier "CD001" (step ST108: Yes), the root directory record corresponding to ISO9660 is read.
The root directory start position recorded in the data area 28 of the optical disk 10 is obtained (step ST11).
0).

When the root directory start position is obtained, the optical head of the disk drive 30
(Step ST112).

In this embodiment, if the set optical disk 10 complies with the SD standard, the root directory describes a directory record called a video title set "VIDEO_TS" specific to the SD standard. I do.

In the accessed root directory, "VI
If the directory record “DEO_TS” is not described (NO in step ST114), the process jumps to the node A. “VIDEO_T” is added to the root directory.
If the directory record “S” is described (Yes in step ST114), “VIDEO_TS”
Start position of the directory (data area 2
8 is accessed (step ST116).

The accessed directory "VIDEO_
TS ”and video title set information“ VIDEO_T ”
If there is no description of "S.INF" (No in step ST118), the process jumps to node A. "VIDEO_TS.
If there is a description of "INF" (YES in step ST118), the system CPU unit 50 determines for the first time that "the set optical disk 10 is a disk conforming to the SD standard", and that effect (display of the symbol "SD"). ) Is displayed on the display unit 4 (see FIG. 14) of the playback device (step ST).
16).

When the above-mentioned "SD" is displayed, the system CPU unit 50 of the reproducing apparatus of FIG. 1 executes a reproducing processing routine of the SD disk, and executes the operation (by manual operation of the user or setting of the disk 10 in the apparatus). The reproduction of the disc 10 is started (by the linked automatic operation) (step ST30).

Steps ST104 and ST108 in FIG.
When the disc 10 is caught by one of the judgment barriers in ST114 and ST118 (determination of NO), and it is determined that the loaded disk 10 is not an SD disk, the process proceeds to FIG.

That is, this time, the system CPU 50
Assumes that the optical disk 10 set in the apparatus of FIG. 1 is "a CD type optical disk" for the time being. Then, an optical head (not shown) of the disk drive unit 30
Then, focusing and track search are started from the innermost lead-in area of the disk 10 (step ST120). (Because the servo parameters of focus servo and track servo are different between SD and CD,
Here, the servo parameters are also changed. First, the subcodes P and Q conforming to the CD standard are read from the table of contents (TOC) area that should be arranged in the lead-in area. If the subcodes P and Q can be read (step ST12)
2) It is checked whether the addresses of the models 1, 2, 3, and 5 in the subcode Q are 1, 2, 3, and 5, respectively. If the address in the subcode Q is 1, 2, 3, or 5 (YES in step ST124), the system CPU
The unit 50 determines that “the set optical disk 10 is a disk conforming to the CD standard”, and to that effect (the symbol “C
D ”) is displayed on the display unit 4 (see FIG. 14) of the playback device (step ST126).

When the above-mentioned "CD" is displayed, the system CPU section 50 of the reproducing apparatus of FIG. 1 executes a reproducing process routine of the CD disk, and executes the operation (manual operation by the user or setting of the disk 10 in the device). The reproduction of the disc 10 is started (by the linked automatic operation) (step ST128).

In the process shown in FIG. 9, when subcodes P and Q cannot be read from the TOC area (step ST
122 No), or when the addresses in the subcode Q are not 1, 2, 3, 5 even though the subcodes P and Q can be read (No in step ST124), the set optical disk 10 is neither an SD nor a CD. Will be. FIG.
If the device is configured to accept only one of SD, CD, and LD, at this point (step ST
(No at 122 or No at step ST124) There is also a method of determining that "the set disc is an LD".
However, here, for perfection, the disk size is checked to detect the LD.

That is, the disk drive unit 30 shown in FIG.
Is equipped with a disk size sensor DSS. The configuration of the sensor DSS is simple, as long as it can detect that the set disk diameter is larger than 12 cm. For example, a photodiode (not shown) and a phototransistor are arranged opposite to each other at a position about 7 cm away from the center shaft of a spindle motor (not shown) for rotating a disk. When an LD having a diameter of 20 cm or 30 cm is set, the photodiode is turned off. The optical path to the phototransistor is configured to be cut off.

An LD having a diameter of 20 cm or 30 cm is shown in FIG.
When the optical path (not shown) from the photodiode to the phototransistor is cut off, it is electrically detected that the diameter of the set disk 10 is larger than 12 cm (Yes in step ST130). . Then, the system CPU unit 50 states that “the set optical disk 10 is a disk conforming to the LD standard”.
Is displayed on the display unit 4 (see FIG. 14) of the playback device (step ST13).
2).

When the above-mentioned "LD" is displayed, the system CPU 50 of the reproducing apparatus shown in FIG. 1 executes a reproduction processing routine of the LD disk, and executes the operation (manual operation by the user or setting of the disk 10 in the apparatus). The reproduction of the disc 10 is started (by the linked automatic operation) (step ST134).

If there is a 12 cm disk that is neither an SD nor a CD, such a disk is
In this case, the optical path (not shown) from the photodiode to the phototransistor is not interrupted, and it is electrically detected that the diameter of the set disk 10 is 12 cm or less (step S12). ST130
No). In this case, the system CPU unit 50 displays an error on the display unit 4 (see FIG. 14) of the playback device, stops the playback operation, or automatically ejects the disc (step ST36).

The error display in this case is shown in FIG.
Is set to "EE-EE" for the chapter number display 4-digit 8-segment blinking. At this time, a warning message such as "This disc cannot be reproduced. Replace it with another disc." May be output to the monitor unit 6 in FIG.

FIG. 10 is a flowchart for explaining the operation of a multiple recording medium (SD / CD / LD) compatible reproducing apparatus according to the second embodiment of the present invention. In this embodiment, it is assumed that the 12 cm optical disc 10 set in the reproducing apparatus of FIG. 1 includes the identifier “SD001”.

When the optical disk 10 is set in the reproducing apparatus of FIG. 1, the system CPU unit 50 assumes that "the set disk is an SD type optical disk" (system default setting). Then, an optical head (not shown) of the disk drive unit 30 starts focusing and track search from the innermost peripheral lead-in area 27 of the disk 10. Thereby, the disk 1
A predetermined number of bytes (for example, 24 blocks from a logical block number # 0 to # 23; about 50 kbytes) is read from the beginning of the lead-in area 27 of the system RA.
The data is written to the M section 52 (step ST10).

The system CPU 50 retrieves the PVD portion in the volume management information 74 of FIG. 7 from the read lead-in area data of 50 Kbytes (step ST12). And, for example, logical block number #
0, the data between 33793 bytes and 33798 bytes from the beginning is passed through, and the extended system identifier "SD0
01 "is present (step ST
14).

The extended system identifier “S” is assigned to the searched PVD.
If D001 "exists (Yes in step ST14),
The system CPU unit 50 reads “the set optical disc 10
Is a disc conforming to the SD standard ", and the display unit 4 (FIG. 1) of the reproducing apparatus
4) (step ST16). Thereafter, the system CPU unit 50 executes a normal reproduction processing routine for the SD disk (step ST30).

The extended system identifier “S” is assigned to the searched PVD.
If D001 "does not exist (No in step ST14), the system CPU unit 50 determines that" the set optical disc 10 is not a disc conforming to the SD standard ", and checks the diameter of the set disc 10.

The diameter of the set disk 10 is 12c.
If it is detected that the value is larger than m (Yes in step ST18), the system CPU unit 50 determines that "the set optical disk 10 is a disk conforming to the LD standard", and that effect (indicated by the symbol "LD"). Is displayed on the display unit 4 (see FIG. 14) of the playback device (step ST20). Thereafter, the system CPU unit 50 sets the disk drive unit 30
LD for focus servo and tracking servo
And a normal reproduction processing routine for the LD disk is executed (step ST30).

The diameter of the set disk 10 is 12c.
m (No in step ST18), the system CPU 50
0 focus servo and tracking servo C
D, and reads the TOC area of the disk 10 to check the contents of the subcode Q (step S
T22).

If the address in the subcode Q is "1" (or 4-bit address 0001), it is determined that the set disk 10 is a CD (step ST24).
(Yes), the fact (display of the symbol "CD") is displayed on the display unit 4 (see FIG. 14) of the playback device (step ST2).
6). Thereafter, the system CPU unit 50 executes a normal reproduction processing routine for the CD disk (step ST3).
0).

If the address in the subcode Q is not "1" (or the 4-bit address 0001), it is determined that the set disk 10 is not a CD (step S).
T24 No). Before the judgment step (ST14, S
Since it is known that the disc 10 set in T18) is neither SD nor LD, an error display is eventually output to the display unit 4 or the monitor unit 6 of the playback device (step ST36).

FIG. 11 is a flowchart for explaining the operation of a multiple recording medium (SD / CD / LD) compatible reproducing apparatus according to the third embodiment of the present invention. Also in this embodiment, it is assumed that the 12 cm optical disc 10 set in the reproducing apparatus of FIG. 1 includes the identifier “SD001”.

Steps ST10 to ST14 in FIG. 11 are the same as those in FIG. 10, and a description thereof will not be repeated.

The system CPU 50 adds the extended system identifier “SD” to the PVD portion in the volume management information 74.
001 ”is checked (step S
T14). If the extended system identifier “SD001” exists (step ST14, Yes), the system CPU unit 5
0 is determined as "the loaded optical disk 10 is a disk conforming to the SD standard", and that effect (display of the symbol "SD") is displayed on the display unit 4 (see FIG. 14) of the playback device (step ST16). ).

After the disc 10 is set on the disc tray (not shown), when the user presses the tray into the reproducing apparatus, the system CPU 50 automatically starts the reproduction of the SD disc 10 (step ST32). .

On the other hand, after the disc 10 has been set on a disc tray (not shown), when the user performs an operation of pulling the tray into the playback device by operating a button, the system CPU 50 presses the start button of the playback device. After that, the reproduction of the SD disk 10 is started (step ST32).

Thereafter, if the disk reproduction normally starts (step ST34 YES), the SD normal reproduction processing routine is executed (step ST38).

On the other hand, if the disk reproduction does not start normally (No in step ST34), an error display is output to the display unit 4 or the monitor unit 6 of the reproduction apparatus, and the operation of the apparatus stops (step ST36). (The unplayable disc may be ejected along with this operation stop.)
If the extended system identifier “SD001” does not exist in the VD (No in step ST14), the system CPU 50
Assume that the optical disk 10 set is “a CD-type optical disk”.

Next, the system CPU unit 50 switches the focus servo and the tracking servo of the disk drive unit 30 for the CD, reads the TOC area of the disk 10, and checks the contents of the subcode Q (step ST22).

If the address in the sub-code Q is "1" (4-bit address 0001), it is determined that the set disk 10 is a CD (YES in step ST24), and that fact (indicating the symbol "CD"). ) Is displayed on the display unit 4 (see FIG. 14) of the playback device (step ST26).
Thereafter, the system CPU unit 50 performs a manual start or an automatic start of CD reproduction (step S).
T32).

When the reproduction of the disc starts normally (step ST34, Yes), the normal reproduction processing routine for the CD is executed (step ST38). If the disk reproduction does not start normally (No in step ST34),
An error display is output to the display unit 4 or the monitor unit 6 of the playback device, and the operation of the device stops (step ST36).

On the other hand, if the address in the subcode Q is "1"
If it is not (4-bit address 0001) (step S
(No at T24), the system CPU unit 50 indirectly determines that the set disk 10 is an LD, and displays that fact (display of the symbol “LD”) on the display unit 4 (see FIG. 14) of the playback device. (Step ST20). Thereafter, system CPU unit 50 performs a manual start or an automatic start of CD reproduction (step ST32).

If the disk reproduction normally starts (step ST34 YES), the normal reproduction processing routine of the LD is executed (step ST38). If the disk reproduction does not start normally (No in step ST34),
An error display is output to the display unit 4 or the monitor unit 6 of the playback device, and the operation of the device stops (step ST36).

FIG. 12 is a flowchart for explaining the operation of the multiple recording medium (SD / CD) compatible reproducing apparatus according to the fourth embodiment of the present invention. This embodiment also assumes that the optical disc 10 includes the identifier “SD001”. In this embodiment, it is also possible to automatically determine whether the set disk is a music CD or a data CDROM. This embodiment is applied to a case that is not compatible with LD (a device that can set only an optical disk having a diameter of 12 cm or less).

The flow of FIG. 12 includes steps ST21 to ST21.
Since the configuration is the same as that of FIG. 11 except for the step 26, the overall description is omitted, and the description will focus on steps ST21 to ST26.

The volume management information 7 accessed first
If there is no SD identifier “SD001” in the PVD of No. 4 (No in step ST14), the system CPU unit 50 switches the focus servo and the tracking servo of the disk drive unit 30 to the CD, and sets the T
The OC area is read to check the contents of the control bits of the subcode Q (step ST23).

In this check, if the control bit of the sub-code Q indicates that the track is an audio track (the 4-bit control bit is 000
0, 1000, 0001, or 1001), it is determined that the set disk 10 is a music CD (Yes in step ST24), and to that effect (the symbol "MUSIC-C").
D ”) is displayed on the display unit 4 (see the lower part of FIG. 14) of the playback device (step ST26). Thereafter, system CPU unit 50 performs a manual start or an automatic start of CD reproduction (step ST32).

If the disk reproduction starts normally (step ST34, Yes), the normal reproduction processing routine of the CD is executed (step ST38). If the disk reproduction does not start normally (No in step ST34),
An error display is output to the display unit 4 or the monitor unit 6 of the playback device, and the operation of the device stops (step ST36).

On the other hand, if the control bit of the sub-code Q indicates a data track (the 4-bit control bit is 0100), it is determined that the set disk 10 is a CDROM (step ST2).
4 No), a message to that effect (display of the symbol "CD-ROM") is displayed on the display unit 4 (see the lower part of FIG. 14) of the playback device (step ST21). After that, the system CPU unit 50
A manual or automatic start of CD reproduction is performed (step ST32).

When the reproduction of the disk starts normally (step ST34, Yes), the normal reproduction processing routine for the CD is executed (step ST38). If the disk reproduction does not start normally (No in step ST34),
An error display is output to the display unit 4 or the monitor unit 6 of the playback device, and the operation of the device stops (step ST36).

FIG. 13 is a flowchart for explaining the operation of the multiple recording medium (SD / CD) compatible reproducing apparatus according to the fifth embodiment of the present invention. Also in this embodiment, it is assumed that the optical disc 10 includes the identifier “SD001”, and the set disc is music C
It is also possible to automatically determine whether the data is D or data CDROM. This embodiment is also applied to a case that does not support LD (a device that can set only an optical disk having a diameter of 12 cm or less).

The flow of FIG. 13 includes steps ST24 and ST24.
Since it is the same as that of FIG. 12 except for the determination method at 25, the overall description is omitted, and the description will be focused on steps ST24 and ST25.

Volume management information 7 accessed first
If there is no SD identifier “SD001” in the PVD of No. 4 (No in step ST14), the system CPU unit 50 switches the focus servo and the tracking servo of the disk drive unit 30 to the CD, and sets the T
The OC area is read to check the contents of the control bits of the subcode Q (step ST23).

In this check, if the control bit of the sub-code Q indicates that it is a data track (the 4-bit control bit is 0100),
It is determined that the set disk 10 is a CDROM (Yes in step ST25), and to that effect (the symbol "CD-R
OM ”is displayed on the display unit 4 (see the lower part of FIG. 14) of the playback device (step ST21). Thereafter, system CPU unit 50 performs a manual start or an automatic start of CD reproduction (step ST32).

When the reproduction of the disk starts normally (step ST34, Yes), the normal reproduction processing routine for the CD is executed (step ST38). If the disk reproduction does not start normally (No in step ST34),
An error display is output to the display unit 4 or the monitor unit 6 of the playback device, and the operation of the device stops (step ST36).

On the other hand, if the control bit of the sub-code Q indicates that the data track is not a data track (the 4-bit control bit is other than 0100), it is indirectly determined that the set disk 10 is a music CD (step). ST25 No), to that effect (symbol "MUSIC-C"
D ”) is displayed on the display unit 4 (see the lower part of FIG. 14) of the playback device (step ST26). Thereafter, system CPU unit 50 performs a manual start or an automatic start of CD reproduction (step ST32).

When the reproduction of the disc starts normally (step ST34, Yes), the normal reproduction processing routine for the CD is executed (step ST38). If the disk reproduction does not start normally (No in step ST34),
An error display is output to the display unit 4 or the monitor unit 6 of the playback device, and the operation of the device stops (step ST36). FIG. 14 shows a multi-recording medium compatible reproducing apparatus (digital video disc player) according to an embodiment of the present invention.
FIG. 2 is a diagram exemplifying an external appearance and a disk display portion.

This device has a power switch (POWER)
Next to the large disc tray entrance for 30cmLD,
At the center, a small disc tray entrance for both 12 cm SD / CD is provided. Below this tray entrance, the key operation / display unit 4 of FIG. 1 is provided.

On the right side of the key operation / display section 4, operation buttons for the disc (operation keys for load / eject; playback start; stop; forward skip; backward skip; fast forward; fast reverse) are arranged. The display unit 100 is provided on the right side.

The display section 100 has a display segment of the title number and the chapter number, a display segment of the reproduction time (hour, minute, second), and a segment block for displaying the type of the currently set optical disk (from the back with an appropriate lamp). An illuminated small letter plate) 110 is provided. When the SD is currently set in the device, for example, based on the process of step ST16 in FIG.
The character plate of “SD” in the segment block 110 is illuminated from the back and becomes conspicuous (see the center in the middle of FIG. 14). When a CD is currently set in the apparatus, the character plate of “CD” in the segment block 110 is illuminated from the back, for example, based on the process of step ST126 in FIG. ). When the LD is currently set in the apparatus, the character plate of “LD” in the segment block 110 is illuminated from the back and becomes conspicuous based on, for example, the process of step ST132 of FIG. 8 (see the middle right side of FIG. 14). ).

It should be noted that, in the reserved area of the PVD in the volume management information 74 of FIG. 7, whether the disc set is read-only video SD (VIDEO-SD) or read-only data SD (SD-ROM) is read. When an identifier for distinguishing between a dedicated music SD (MUSIC-SD) and a readable / writable SD (SD-RAM) is written, for example, step ST1 in FIG.
By separately detecting these identifiers in step 4, the type of the set SD disk can be distinguished and displayed (see display 110 at the bottom of FIG. 14).

Also, the identifier “CD001” in the PVD
Based on the contents of the subcode Q in the TOC area (ISO9660 compliant) or TOC area, it is possible to distinguish and display whether the set disc is a read-only music CD (MUSIC-CD) or a read-only data CD (CD-ROM). (See display 110 at the bottom of FIG. 14).

[0102]

According to the present invention, in an apparatus capable of reproducing various disks conforming to a plurality of types of standards, the type of the disk set therein is automatically detected (based on information recorded on the disk), and the detected information is provided to the user. Can notify.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an information reproducing system (SD / CD / LD compatible optical disc player) according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of an information reproducing system (digital tuner for receiving digital broadcasts in a plurality of formats) according to another embodiment of the present invention.

FIG. 3 shows an ultra-high density optical disc (S
The figure which shows the physical structure of D) roughly.

FIG. 4 shows an ultra-high density optical disc (S
The figure explaining the data recording structure of D).

FIG. 5 shows an ultra-high density optical disc (S
FIG. 3D is a view for explaining the recording data structure of FIG.

FIG. 6 shows an ultra-high density optical disk (S) used in the present invention.
The figure explaining the logical structure of the lead-in area of D).

FIG. 7 shows an ultra-high-density optical disk (S
The figure explaining the volume structure of D).

FIG. 8 is a flowchart for explaining the operation of the multiple-recording-medium compatible reproducing apparatus according to the first embodiment of the present invention.

FIG. 9 is a flowchart for further explaining the operation of the multiple-recording-medium compatible reproducing apparatus according to the first embodiment of the present invention.

FIG. 10 is a flowchart illustrating the operation of a multiple-recording-medium compatible playback device according to a second embodiment of the present invention.

FIG. 11 is a flowchart illustrating the operation of a multiple-recording-medium compatible playback device according to a third embodiment of the present invention.

FIG. 12 is a flowchart illustrating the operation of a multiple-recording-medium compatible playback device according to a fourth embodiment of the present invention.

FIG. 13 is a flowchart for explaining the operation of the multiple-recording-medium compatible reproducing apparatus according to the fifth embodiment of the present invention.

FIG. 14 is a view exemplifying an external appearance and a disk display portion of a multiple-recording-medium compatible reproducing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

4 key operation unit; 6 monitor unit; 10 optical disk (S
D, CD, or LD); 30: disk drive unit;
50: system CPU unit; 52: system ROM / R
AM unit; 100 display unit; 110 segment block (small character plate illuminated from behind with a lamp as appropriate); DSS disk size sensor.

Claims (25)

[Claims] An information can be extracted from both a first signal including first identification information specifying an information transmission method and a second signal including second identification information specifying an information transmission method. A first step of detecting the first identification information and extracting information from the first signal; and detecting the second identification information to reduce an information transmission amount per unit time of the first signal. A second step indicating extracting information from the second signal different from the signal; and a first signal or a relatively large information transmission amount corresponding to a detection result of the first step or the second step. And 3) reproducing information included in the second signal having a relatively small information transmission amount. 2. The reproducing method according to claim 1, wherein the first signal includes management information at a head portion thereof, and the management information includes the first identification information. 3. The method according to claim 1, wherein the first signal is provided at a specific portion thereof with the first signal.
The reproduction method according to claim 1, further comprising identification information. 4. A first information recording medium including first identification information for specifying one of a plurality of types of information recording media, and a second identification information for specifying another one of the information recording media. A device capable of extracting information from any of the second information recording media, wherein the first identification information is detected, and the information transmission amount per unit time from the first information recording medium is relatively large. A first step of extracting information; a second step of detecting the second identification information and extracting information having a relatively small information transmission amount per unit time from the second information recording medium; A third step of reproducing information contained in the first information recording medium or the second information recording medium in response to a detection result of the first step or the second step. Feeling Information reproduction method. 5. The reproducing method according to claim 4, wherein said first signal includes management information at a head portion thereof, and said management information includes said first identification information. 6. The first signal includes a first signal in a specific portion thereof.
The reproduction method according to claim 4, wherein the reproduction method includes identification information. 7. A first optical disc including first identification information for specifying one of a plurality of types of information recording media, and a second optical disc including second identification information for specifying another one of the optical discs. And an optical disk capable of taking out information from either the first optical disk or the third optical disk that is neither the second optical disk nor the second optical disk. A second step of detecting the second identification information and extracting information from the second optical disk; and detecting a physical characteristic of the third optical disk to detect the second characteristic information. A third step of extracting information from the third optical disk; and a previous step corresponding to the detection result of the first step, the second step or the third step. A fourth step of reproducing information contained in the first optical disk, the second optical disk, or the third optical disk. 8. The reproducing method according to claim 7, wherein said first signal includes management information at a leading portion thereof, and said management information includes said first identification information. 9. The method according to claim 1, wherein the first signal includes a first signal in a specific portion thereof.
The reproduction method according to claim 7, further comprising identification information. 10. A first information recording medium including first identification information for specifying one of a plurality of types of information recording media, and a second identification information for specifying another one of the information recording media. A device capable of extracting information from any of the second information recording media, wherein the first identification information is detected, and the information transmission amount per unit time from the first information recording medium is relatively large. A first step of extracting information; a second step of detecting the second identification information and extracting information having a relatively small information transmission amount per unit time from the second information recording medium; A third step of automatically starting reproduction of information contained in the first information recording medium or the second information recording medium in response to a detection result of the first step or the second step. Octopus And an information reproducing method. 11. The reproducing method according to claim 10, wherein said first signal includes management information at a head portion thereof, and said management information includes said first identification information. 12. The reproducing method according to claim 10, wherein the first signal includes the first identification information in a specific portion thereof. 13. A first optical disc including first identification information for specifying one of optical discs as a plurality of types of information recording media, and a second optical disc for specifying another one of the optical discs.
A second optical disc including identification information; and a third optical disc that is neither the first optical disc nor the second optical disc, capable of extracting information from the second optical disc. A first step of extracting information from the first optical disk; a second step of detecting the second identification information and extracting information from the second optical disk; A third step of detecting a feature and extracting information from the third optical disk; and responding to the detection result of the first, second, or third step, the first optical disk, the second optical disk, A fourth step of reproducing the information contained in the optical disc or the third optical disc. 14. A first optical disk including first identification information for specifying one of optical disks as a plurality of types of information recording media, and a second optical disk for specifying another one of the optical disks.
A second optical disc including identification information; and a third optical disc that is neither the first optical disc nor the second optical disc, capable of extracting information from the second optical disc. First display means for displaying that information is to be reproduced from the first information recording medium; second display means for detecting the second identification information and displaying that information is to be reproduced from the second optical disc; Third display means for detecting the physical characteristics of the third optical disc and indicating that information is to be reproduced from the third optical disc;
Playback processing for playing back information contained in the first optical disk, the second optical disk, or the third optical disk in response to the detection result of the first display unit, the second display unit, or the third display unit Means for reproducing information. 15. The first optical disc includes the first identification information in a subsequent portion of its lead-in area;
The optical disc has a content table area in its lead-in area, and the content table area contains the second identification information; 15. The reproduction apparatus according to claim 14, further comprising reproduction start means for starting reproduction from a portion where information or the second identification information is to be recorded. 16. A first optical disc including first identification information for specifying one of optical discs as a plurality of types of information recording media, and a second optical disc including second identification information for specifying another one of the optical discs. A first display means for detecting the first identification information and displaying reproduction of the information from the first information recording medium; and a second display means for detecting the first identification information; Second display means for detecting identification information and displaying reproduction of information from the second optical disc; and responding to the detection result of the first display means or the second display means, An information reproducing apparatus, comprising: reproduction processing means for reproducing information contained in the second optical disc. 17. The first optical disc includes the first identification information in a portion subsequent to a lead-in area of the first optical disc;
The optical disc has a content table area in its lead-in area, and the content table area contains the second identification information; 17. The reproduction apparatus according to claim 16, further comprising reproduction start means for starting reproduction from a portion where information or the second identification information is to be recorded. 18. The first optical disk has a volume management area in a subsequent portion of its lead-in area, the volume management area including the first identification information;
The optical disc has a content table area in its lead-in area, and the content table area includes the second identification information; 17. The reproduction apparatus according to claim 16, further comprising reproduction start means for starting reproduction from a portion where the content table area is to be recorded. 19. A first optical disc including first identification information for specifying one of optical discs as a plurality of types of information recording media, and a second optical disc for specifying another one of the optical discs.
A second optical disc including identification information; and a third optical disc that is neither the first optical disc nor the second optical disc, capable of extracting information from the second optical disc. First display means for displaying that information is reproduced from the first optical disk; second display means for detecting that the second identification information is to be displayed to reproduce information from the second optical disk; A third display means for detecting the physical characteristics of the third optical disc and displaying that information is reproduced from the third optical disc; and a detection result of the first display means, the second display means or the third display means. And a reproduction processing means for reproducing the information contained in the first optical disk, the second optical disk, or the third optical disk. Playback device. 20. Information is extracted from both a first signal including first identification information for specifying an information recording format and a second signal including second identification information for specifying an information recording format. A first means for detecting the first identification information and extracting information from the first signal; and detecting the second identification information to reduce an information transmission amount per unit time to the first signal. Second means for extracting information from the second signal different from the first signal;
A third signal for reproducing information included in the first signal having a relatively large information transmission amount or the second signal having a relatively small information transmission amount in accordance with a detection result of the means or the second means.
Means for reproducing information. 21. The reproducing system according to claim 20, wherein the first signal includes management information at a head portion thereof, and the management information includes the first identification information. 22. The reproduction system according to claim 20, wherein the first signal includes the first identification information in a specific portion thereof. 23. An apparatus which can receive both a first transmission signal including first identification information for specifying an information transmission method and a second transmission signal not including the first identification information, First means for detecting identification information to indicate that the first transmission signal has been received; and detecting the first identification information when the first transmission signal or the second transmission signal has been received. If not, a second means indicating that the second transmission signal has been received; and the first means or the second means.
And a third means for reproducing information contained in the first transmission signal or the second transmission signal in accordance with a detection result of the means. 24. The first transmission signal includes management information,
The receiving system according to claim 23, wherein the management information includes the first identification information. 25. The receiving system according to claim 23, wherein said first transmission signal includes said first identification information in a specific portion thereof.