JP2543494B2 - Optical disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of reading data from an optical disk, and more particularly to a method of reading data from a plurality of optical disks in an optical disk device.

[0002]

2. Description of the Related Art A conventional optical disc device is a block diagram of an optical disc device that superimposes characters and images, as shown in the block diagram of FIG. 2, where 1 is an optical disc (for video reproduction) and 2 is an optical disc (music, Character reproduction), 3
Is a system control, 4 is a storage device, 5 is a key input circuit, 6 is an optical disk reproducing device (changer), 7 is an optical disk reproducing device (changer), and 8 is a video circuit. Here, the optical disc 1 is an optical disc for a video (BGV) displayed on the back at the time of superimposing, and the optical disc 2 is an optical disc for reproducing characters and music displayed in the video (BGV). Further, the optical disk device is a changer capable of setting a plurality of optical disks, and has an optical disk selection function and an optical disk reproduction function.

When operating this optical disk device, the user first sets a plurality of optical disk 1 for video reproduction and an optical disk 2 for music and character reproduction in the optical disk reproduction devices 6 and 7, respectively. The user inputs the music to be reproduced, the disk number of the optical disk 2 for reproducing characters, and the music number from the key input circuit. The system control 3 selects an image to be reproduced by BGV from the input optical disc number and music number. At this time, as the selection method of the optical disk 1 for video reproduction, Table 1 is stored as a correspondence table in the storage device 4, and the optical disk 1 for video reproduction is selected according to the correspondence table. The system control 3 reads the disc number of the optical disc 1 for video reproduction from the correspondence table of the storage device 4, and instructs the optical disc reproduction device 6 to select and reproduce the optical disc 1 for video reproduction. At the same time, the optical disk for reproducing the previously inputted music and characters is selected, and the optical disk reproducing device 7 is instructed to reproduce.

When reproduction is started by the two optical disk devices 6 and 7, the data of the disks 1 and 2 are sent to the video circuit 8 and superimposed and output.

[0005]

[Table 1]

[0006]

In the above-mentioned prior art, when the optical disc 2 to be set in the optical disc reproducing device 7 for reproducing music and characters is newly added, the correspondence table of the storage device 4 must be changed. A floppy disk, an IC card, or the like is used as the storage device 4, and when the correspondence table is changed, the data of these devices must be rewritten and exchanged, which is troublesome and expensive. The present invention is to provide a method capable of easily changing such information (correspondence table here).

[0007]

[Means for Solving the Problems] A plurality of optical disks are housed and set in a reproducing apparatus based on information stored in a storage device, and an optical disk (for image reproduction) and an optical disk (for music and character reproduction) are provided. When an optical disc for music and character reproduction is newly added, the system control instructs the optical disc reproduction device to reproduce the added new disc. The reproduced data is sent to the subcode data reading circuit in addition to the video circuit, only the subcode data is decoded, and the data of the correspondence table of the optical disc previously added to the user mode of the subcode data is written. It is added to the device and stored.

That is, the data written in the subcode user mode by the system control is read from the subcode data reading circuit, and the data is written in the storage device. The storage device uses an EE-PROM or a RAM with a backup power source and is a writable / readable device. If this operation is performed at the beginning of adding an optical disk, even if the added optical disk is played, it is possible to superimpose an image that matches the music on the optical disk for playing music and characters. Also, a key input circuit for instructing the system control is provided to specify the performance by key input.

[0009]

FIG. 1 shows an embodiment of the present invention. In the present invention, a plurality of optical discs 1 and 2 are housed and set in the reproducing devices 6 and 7 based on the information stored in the storage device 4, and the optical disc (for video reproduction) 1 and the optical disc (for music and character reproduction) are set. ) Has a device for reproducing the combination of 2 and 2 and a new optical disc 2'for reproducing music and characters is newly added, the system control 3 instructs the optical disc reproducing device 7 to reproduce the newly added optical disc 2 '. To do. The reproduced data is read by the subcode data reading circuit 9 in addition to the video circuit.
The sub-code data is sent to the sub-code data, and only the sub-code data is decoded, and the data of the correspondence table of the optical disc previously recorded in the user mode of the sub-code data is additionally stored in the storage device 4.

That is, the data written in the subcode user mode by the system control 3 is read from the subcode data reading circuit 9, and the data is written in the storage device 4. The storage device 4 uses an EE-PROM or a RAM with a backup power source and is a writable / readable device. By performing this operation at the beginning when the optical disc 2 is added, even if the added optical disc is played, it is possible to superimpose an image that matches the music on the optical disc 2 for music and character reproduction.

The basic subcode of an optical disc (CD) consists of 8 bits of P to W, and one frame (main frame) of CD contains 1 SYMBOL (P to W).
One subcode frame is made up of 98 mainframes. The subcode format is as shown in FIG. The basic idea of data structure is 1SYMBOL (RW)
Collect 24 units to make 1 PACK, and pack 4 PACKs into 1 PACK
ET. Synchronization is added to this to form one subcode frame. Fig. 4 shows the basic configuration of 1PACK. MODE, ITEM
Indicates the mode in which the data is recorded. The modes are as shown in Table 2 below.

[0012]

[Table 2]

In the present invention, the USER (hereinafter referred to as user) mode among the above modes is used, and the data of the correspondence table is written therein. The user mode is a mode that the user can use independently, and the format of the data field is not specified. FIG. 5 shows the format of 1PACK used in the present invention. SYMBOL0 is M0DE and ITEM. Since the user mode is used, set as follows. RSTUVW 111000 SYMBOL1 is an instruction. It determines the character of the DATE FIELD and can be set arbitrarily by the user, but here it is set as follows. RSTUVW 100000

SYMBOL4 to 7 are serial numbers. It is a serial number assigned to each pack that starts from "0" and is for eliminating missing data when reading data.
The subcode data reading circuit 9 reads the data from the disc while checking the serial number. The data uses the lower 4 bits of SYMBOL4 to 7, and puts "0" in the upper 2 bits. Serial numbers are 0 to 6553
It takes a value of 6.

SYMBOL 8 to 11 are disc numbers of the optical disc 2 for reproducing music and characters, and indicate at which position of the optical disc reproducing device 7 (changer) the disc is inserted. Data uses the lower 4 bits of SYMBOL8-11,
"0" is put in the upper 2 bits. The disk number takes a value from 0 to 65536.

SYMBOLs 12 and 13 are song numbers of the optical disc 2 for reproducing music and characters, and indicate which song number of the optical disc 2 is to be reproduced. Data is the lower 3 of SYMBOL8
Bits and lower 4 bits of SYMBOL8 are used, and "0" is put in the upper bits. The tune numbers take values from 0 to 127, but the numbers actually used are from 1 to 99. (CD
Standards).

SYMBOL 14 to 17 are the disk numbers of the optical disk 1 for video reproduction, and indicate at which position of the optical disk reproduction apparatus 6 (changer) the disk is inserted. The data uses the lower 4 bits of SYMBOL 14 to 17, and puts "0" in the upper 2 bits. Disk numbers are 0 to 6
It takes a value of 5536.

SYMBOLs 18 and 19 are music numbers of the optical disk 1 for reproducing the video, and indicate the music number of the optical disk 1 to be reproduced. The data uses the lower 3 bits of SYMBOL 18 and the lower 4 bits of SYMBOL 19, and puts "0" in the upper bits.

The data of 1 PACK has the format as described above, but when writing this data to the optical disk, it becomes as shown in FIG. Data for the number of songs on the optical disk is put in the subcode in order from the first song. One piece of data (for one song) is written 20 times in a row. In other words, one subcode frame has 4 PACKs, so 20PA
If you write CK consecutively, it will be 5 subcode frames. This is 1
Since the time for reading the PACK is as short as 3.3 milliseconds, the subcode data reading circuit 9 cannot read data continuously once. Therefore, it is easy to read the data by writing multiple data. At the time of setting, the user first sets the optical disk 1 for video reproduction and the optical disk 2 for music and character reproduction in the optical disk reproduction devices 6 and 7.

Since no correspondence table data is stored in the storage device 4 at the time of factory shipment, the correspondence table data is first read from the set optical disk for reproducing music and characters, and the data is written in the storage device 4. When the power is turned on, the user turns on the power while pressing the key of the key input circuit 5 in order to inform the system control 3 that the data is read from the optical disk for reproducing music and characters. For example, the power is turned on while pressing the two keys "1" and "9". The system control 3 judges that the data is read at the time of installation, controls the optical disk reproducing device 7, and sequentially reproduces the set optical disks 2. The reproduced data is sent to the subcode data reading circuit 9, and the data is read from the subcode. Only the necessary data (SYMBOL4 to 19) that is read out is transferred to the system control 3. The system control 3 writes the sent data in the storage device 4 in the form of a correspondence table, Table 3.

[0021]

[Table 3]

The system control 3 performs such an operation on all of the plurality of optical disks 2 set in the optical disk reproducing device 7. A plurality of optical discs 2 are set in order in the optical disc reproducing device 7, and the system control 3 stores up to which data of the optical disc 2 has been read at the time of setting. The data writing at the time of setting is completed by the above operation. Next, the operation when adding a new optical disk is almost the same when adding.

In order to inform the system control 3 that a new disk is added at power-on, the power is turned on while pressing the key of the key input circuit 5 at the time of power-on, but the key to be pressed must be different from the setting. I have to. Here, the power is turned on while pressing "7" and "3". The system control 3 judges that the data is read when the new optical disc is added, and controls the optical disc reproducing device 7 to reproduce the set new optical disc 2. The setting of the additional optical disk is automatically performed because it stores the data up to which the optical disk 2 has been read at the time of setting. The reproduced data is sent to the subcode data reading circuit 9, and the data is read from the subcode. The read data is the required data (SYMBOL
Only 4 to 19) are transferred to the system control 3. The system control 3 additionally writes the sent data to the correspondence table of the storage device, Table 4.

[0024]

[Table 4]

The system control 3 performs such an operation on all the optical disks 2 added to the optical disk reproducing apparatus 7. The system control 3 memorizes up to which data of the optical disc 2 is read at the time of addition,
When the next disk is added, the next disk is automatically taken. A reproduction circuit for audio or the like is included in the optical disc reproduction device, and the key input circuit 5 can be designated to perform music and character information reproduction and image reproduction by program reproduction in synchronization with the image by the system control 3. .

[0026]

As is clear from the above description, music,
When the optical disk 2 to be set in the character reproducing optical disk reproducing device 7 is set or added, the correspondence table of the storage device 4 can be easily written and added, and mutual related information can be read and reproduced.

[0027]

[Brief description of drawings]

FIG. 1 is a block diagram of an optical disc reproducing apparatus of the present invention.

FIG. 2 is a block diagram of a conventional optical disc device.

FIG. 3 is a data configuration diagram of a subcode.

FIG. 4 is a PACK configuration diagram.

FIG. 5 is a PACK configuration diagram of the present invention.

FIG. 6 is a configuration diagram of a data subcode according to the present invention.

[Explanation of symbols]

 1 optical disk (for video playback: LD) 2 optical disk (for music and character playback: CD) 3 system control 4 storage device 5 key input circuit 6 optical disk playback device (changer or single playback) 7 optical disk playback device (changer) 8 video Circuit 9 Subcode data reading circuit

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Claims (1)

(57) [Claims] 1. An optical disk in which data is written in a user mode of a subcode of an optical disk in an optical disk apparatus having an optical disk reproducing apparatus capable of accommodating a plurality of disks and setting the same in a reproducing apparatus, and a storage means,
Means for writing data to a storage device provided in the optical disc device by reading the subcode data of the optical disc each time the optical disc is set in the reproducing device; and reading the subcode data written in the storage device. An optical disk device characterized in that information related to each other of a plurality of optical disks housed in each is taken out, and audio information and image information are respectively connected to operate.