JP2001126377A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk reproducing device which can easily reproduce the suitable one of plural types of disks. SOLUTION: This disk reproducing device comprises a reproduction means 2 which reproduces selectively plural stored disks, a control means 1 which controls the reproducing operation of the means 2, the discrimination means 1 and 9 which discriminate the DST disks by the DST information included in the disk reproduction signals and a storage means 11 which stores the results of discrimination of the discrimination means 1 and 9. The control means 1 skips automatically the DTS disks among disks and performs the control to reproduce a disk other than the DTS disks according to the discriminating results stored in the means 11 when the disk is reproduced by the means 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus for automatically discriminating and reproducing a DTS disc.

[0002]

2. Description of the Related Art A mega-changer type CD player capable of storing, for example, 200 CDs has been known as a disk reproducing apparatus capable of storing a plurality of disks. In such a megachanger type CD player, a plurality of stored CDs can be arbitrarily selected and sequentially reproduced. Further, as a reproduction signal, a digital output signal can be obtained from a digital output terminal, or an analog output signal can be obtained from an analog output terminal.

However, if a plurality of stored CDs include a disk in which digital audio is compressed (hereinafter, referred to as a "DTS disk"), when the DTS disk is reproduced, noise is generated in an analog output. . Here, the DTS disc includes an LD (laser disc), a DVD (digital video disc) and the like in addition to the CD. In the case of a DTS disc, if it is decoded before reproduction using the DTS decoding function, an analog output signal can be obtained by signal processing similar to that of a normal CD.

However, it has no DTS decoding function,
That is, when a DTS disc is reproduced by a CD player that is not compatible with the DTS disc, noise appears in the analog output signal.

Similarly, without a DTS decoding function,
That is, for receivers that do not support DTS,
Even when the above-described CD player is connected as an input source and a digital output signal of a DTS disc is received and reproduced from its digital output terminal, noise appears in the reproduced output signal.

One of the solutions to this problem is that, in a CD player having no digital output but only an analog output, the user is required to register a DTS disc by himself, and when the DTS disc is reproduced, , Muting is applied to prevent noise from appearing on the analog output.

As another method, there is a method of mounting a "DTS disk skip" function on a CD player.

The method of using the "DTS disc skip" function will be described below.

FIG. 6 is a flowchart for explaining the DTS disk data registration / deletion operation by the user. First, it is determined whether or not to perform DTS registration (step S31). If registration is to be performed, a DTS disk is selected (step S32). Next, after the DTS disk is determined, the designated DISC No. The DTS information is registered in the area corresponding to (disk number; representing the storage location of the disk) (step S33).

On the other hand, if DTS registration is not performed in step S31, it is determined whether or not to delete DTS (step S34). If the DTS is not deleted, the operation ends. When performing DTS deletion, a DTS disk to be deleted is selected (step S35).
Next, after the disc is determined, the designated DISC NO.
The DTS information is deleted from the RAM area corresponding to (disk number; representing the storage location of the disk) (step S36).

FIG. 7 is a diagram showing an example of DTS disk data stored in the RAM. In FIG. 7, DIS
C NO. Since DTS disks are stored in 1, 3, and 100, "DTS" is input as disk data. Also, DISC NO. Since a CD other than the DTS disk is stored in 2,150 or the like, "NOT DTS" is input as disk data.

[0012] Thus, the CD or DTS to each storage location
When a disk is replaced, DTS registration and deletion are performed by the user. The user can use the "DTS disc skip" function of the CD player during analog playback on a changer-type CD player that does not have a digital output or digital playback on a receiver that does not support DTS using the CD player as an input source. Start manually. As a result, the DTS-registered disc is skipped and not reproduced, and the DTS is not reproduced.
Only CDs other than discs are played. Therefore, the generation of the noise accompanying the reproduction of the DTS disk is avoided.

[0013]

However, even when the above-mentioned "DTS disk skip" function can be used, there is an annoyance that the user has to register the DTS disk by himself. That is, as shown in FIG.
SC NO. When the user wants to register the DTS, the DTS registration process as shown in FIG.

Further, once DTS registration is performed, the disc is skipped and cannot be reproduced unless the DTS deletion processing as shown in FIG. 6 is performed again. Before performing DTS registration, the DT
When the S disk is reproduced, there is a problem that noise is generated in the output.

[0015] In view of such problems, an object of the present invention is to provide a disk reproducing apparatus that can easily reproduce a disk suitable for reproduction from a mixture of plural types of disks.

[0016]

In view of the above-mentioned object,
A disc reproducing apparatus according to the present invention includes: a reproducing unit for selectively reproducing a disk from a plurality of stored disks; a control unit for controlling a reproducing operation of the reproducing unit; and a DTS information included in a disk reproduction signal. A discriminating means for discriminating a DTS disk storing DTS information, and a storage means for storing a discrimination result by the discriminating means are provided. The control means controls the automatic skip of the DTS disc in the disc and the reproduction of a disc other than the DTS disc based on the discrimination result stored in the storage means when the disc is reproduced by the reproducing means.

As a result, the DTS information of the DTS disc is automatically determined and stored. Since the DTS disk is skipped during the disk reproduction based on the discrimination result, the DTS disk is not erroneously reproduced and noise does not appear.

According to another aspect of the present invention, there is provided a disc reproducing apparatus for reproducing a disc selectively from a plurality of stored discs, a control means for controlling a reproducing operation of the reproducing means, and a disc reproducing signal. DTS decoding means for decoding the DTS information to be read out, determination means for determining the DTS disk storing the DTS information based on the DTS information from the DTS decoding means, and storage means for storing the determination result by the determination means. . The control means controls to select and reproduce only the DTS disk in the disk based on the discrimination result stored in the storage means when the reproducing means reproduces the disk.

Thus, the DTS information of the DTS disc is automatically determined and stored. Then, based on this determination result, it is possible to selectively reproduce only the DTS disk at the time of reproducing the disk.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk reproducing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a disk reproducing apparatus according to the present invention. The disc reproducing device is a changer-type CD player capable of storing a plurality of discs, and includes a microcomputer (hereinafter referred to as a microcomputer) 1, a changer mechanism 2, and a key input unit 3.
, A display unit 4, a signal processing unit 5, a spindle servo circuit 6, an optical pickup 7, a tracking thread servo circuit 8, a DTS decoder 9, a DAC (digital / analog converter) 10, and a RAM 11. ing.

The microcomputer 1 functions as control means for controlling the operation of the entire CD player, and has a DTS (to be described later).
Acts as a discriminator. Changer mechanism 2
Has a mechanism for storing, for example, 200 CDs, selecting one of them and placing it on a spindle (not shown).

The key input unit 3 includes various operation keys normally required for instructing the operation of the disc reproducing apparatus, for example, a reproduction key and a stop key (neither is shown).
Further, in particular, the present invention also includes a DTS disc skip key 3a and a DTS disc playback key 3b.

The display unit 4 performs display related to various operations of the CD player. The signal processing section 5 processes the reproduction signal from the optical pickup 7 and controls the spindle servo section 6 and the tracking thread servo circuit 8. The spindle servo unit 6 is for controlling the rotation of the spindle on which the disk is mounted. The optical pickup 7 is for optically reading information recorded on a disk mounted on a spindle.

The tracking sled servo circuit 8 controls the focus and tracking sled under the control of the signal processing unit 5. The DTS decoder 9 functions as a unit having both a discriminating unit and a DTS decoding unit, discriminates a DTS disk, and decodes DTS information included in a reproduction signal from the optical pickup 7. The DAC 10 digitally / analog-converts and outputs the reproduced signal that has passed through the signal processing unit 5. The RAM 11 serves as storage means, stores DTS determination data described later, and stores the DTS determination data even when the power of the CD player is turned off.

In the configuration shown in FIG. 1, a disc selected and designated in the changer mechanism 2 under the control of the microcomputer 1 by a reproduction command by operating an operation key of the key input unit 3, for example, a reproduction key (not shown). A numbered disk (not shown) is transported on a turntable (not shown). Then, the spindle servo circuit 6
As a result, the turntable is rotated, and the optical pickup 7 performs the reproducing operation of the disk.

DISC No. selected and designated among the stored disks. When reading a disc with the optical pickup 7, the TOC (table of table
Content) information is read. If the disc is a DTS disc, the TOC information includes DTS information. This DTS information is stored in the DTS decoder 9
Is decoded. Based on the decoded DTS information, the microcomputer 1 determines that the disk is a DTS disk, and stores the determination data “DTS” in the RAM 11
ISC NO. Is stored in the area corresponding to.

When the disc is a CD other than the DTS disc, the TOC information does not include the DTS information. Therefore, the DTS decoder 9 and the microcomputer 1
Discriminates that the disc is a CD other than the DTS disc, and stores the discrimination data "NOTDTS" in the DISC NO. Is stored in the area corresponding to.

FIG. 2 shows the result of the above-described discrimination processing.
FIG. 3 is a diagram showing an example of discrimination data stored in No. 1; FIG.
Then, DISC NO. The discrimination data “DTS” is stored in 1, 3, and 100, indicating that the disc is a DTS disc. Also, DISC NO. 2,150 shows "NOT
"DTS" is stored to indicate that the CD is a CD other than the DTS disc.

After disc discrimination, the DTS disc skip key 3a is pressed to activate the "DTS disc skip" function.
Referring to the TS discrimination data, the disc to be reproduced is DTS
Determine whether it is a disk. If the discrimination result indicates that the disc is a DTS disc, the disc is automatically skipped and a CD other than the DTS disc is reproduced. Therefore, in the case of the discrimination data shown in FIG. 2 and DIS
C NO. 150 discs will be played.

As described above, the "DTS disc skip" function automatically skips a DTS disc and does not reproduce the disc, and reproduces a CD other than the DTS disc during disc reproduction. Therefore, if the CD player does not have a digital output, if the receiver that uses the CD player as the input source selects the analog output of the CD player, or if the receiver that does not support DTS has the digital output of the CD player, This is effective when performing playback of.

The processing for storing the DTS discrimination data in the RAM 11 is performed during normal reproduction in which only one of the stored disks is selected and reproduced, or when all of the stored disks are in the DISC NO. At the time of continuous playback in which playback is performed in order from 1, random playback in which stored discs are selected at random, and program playback in which stored discs are played back in a designated order, Prior to reproduction of a music signal or the like recorded on a specified disc, DTS information included in the TOC information may be read for only one disc, or may be read for a plurality of selected discs. The data may be read, or all the stored disks may be read in order.

Similarly, the "DTS disc skip" function can be applied to any of the above-described normal reproduction, continuous reproduction, random reproduction, and program reproduction.

FIG. 3 is a flowchart showing an example of the DTS determination processing for storing the DTS determination data in the RAM 11. Here, a case will be described in which DTS information included in the TOC information is sequentially read for all the stored disks prior to reproduction of a music signal or the like recorded on a specified disk.

First, n (integer) is set to 1 (step S1). Next, the n-th DISCNO. , Ie D
ISC NO. n TOC information is read (step S2). Next, the microcomputer 1 determines the DISC NO. Based on the DTS information in the read TOC information. It is determined whether the disk n is a DTS disk or not (step S
3).

If the answer to step S3 is yes, the RAM
11 on the above DISC NO. DTS information, that is, determination data “DTS” is registered in the area corresponding to n (step S4).

On the other hand, if the answer to step S3 is no, R
The above DISC NO. n is deleted from the area corresponding to n (that is, the determination data “NO
TDTS ”is registered) (step S5).

In the microcomputer 1, n is the maximum DISC.
NO. Is determined (step S6). If the answer is no, n is incremented by 1 (step S7), and the process returns to step S2. On the other hand, if the answer is yes, the work ends.

FIG. 4 is a flow chart for explaining an example of a disk reproducing operation by the "DTS disk skip" function. Here, all of the stored disks are assigned DISC NO. A case of continuous reproduction in which reproduction is performed sequentially from 1 will be described.

First, n (integer) is set to 1 (step S11). Next, the microcomputer 1 determines whether or not the DTS disc skip key 3a has been pressed (turned on) (step S12).

If the answer to step S12 is no, the process proceeds to step S15, and if yes, the microcomputer 1 sets the n-th D
ISC NO. , That is, DISC NO. n DTSs
Information is loaded from a corresponding area on the RAM 11 (step S13). Next, the microcomputer 1 determines the DISC No. based on the loaded DTS information. It is determined whether the disk n is a DTS disk (step S1).
4). If the answer is yes, proceed to step S17; if no, DISC NO. The reproduction of the n-th disk is started (step S15). Next, the microcomputer 1
NO. It is determined whether or not the reproduction of the n-th disk has been completed (step S16). If the reproduction has not been completed, step S16 is continued.

On the other hand, when the reproduction is completed, the microcomputer 1
Indicates that n is the maximum DISC NO. Is determined (step S17). If the answer is no, n is incremented by 1 (step S18), and step S12 is performed.
Return to On the other hand, if the answer is yes, the work ends.

As described above, the embodiment of the present invention has been described, but the present invention is not limited to this, and various modifications and applications are possible. For example, LD or D other than CD
A device for reproducing VD may be used. In the above-described embodiment, the DTS among the plurality of stored disks is
Although only the disc is skipped and played back,
It is also possible to automatically select and play back only the DTS disc.

That is, a DTS disc playback key 3b is provided in the key input section 3, and the DTS disc playback key 3b
Pressing activates the "DTS disc playback" function. As a result, the DTS decoder 9 and the microcomputer 1 store the DTS as shown in FIG.
With reference to the determination data, it is determined whether the disk is a DTS disk. As a result of the determination, if the disc is a DTS disc, D
After decoding in the TS decoder 9, reproduction is performed. On the other hand, if the CD is other than the DTS disc, the disc is automatically skipped and not reproduced. In the case of the discrimination data shown in FIG. 1,3,100 D
Only the TS disk is played.

FIG. 5 is a flowchart for explaining the operation of reproducing a DTS disk by the "DTS disk reproduction" function. Here, all of the stored disks are assigned DISC NO. A case of continuous reproduction in which reproduction is performed sequentially from 1 will be described as an example.

First, n (integer) is set to 1 (step S21). Next, the microcomputer 1 determines whether or not the DTS disk reproduction key 3b has been pressed (turned on) (step S22).

If the answer to step S22 is yes, the microcomputer 1 sets the n-th DISC NO. , Ie DIS
C NO. The n DTS information is loaded from the corresponding area on the RAM 11 (step S23). Next, the microcomputer 1 performs DISC based on the loaded DTS information.
NO. It is determined whether the disk n is a DTS disk (step S24). If the answer is no, step S2
Go to 7. On the other hand, if the answer to step S22 is no, the process proceeds to step S25. If the answer to step S24 is yes, the process proceeds to step S25.

Next, DISC NO. The reproduction of the n-th disk is started (step S25). Then, the microcomputer 1 outputs the DISC NO. It is determined whether the reproduction of the n-th disk has been completed (step S26). If the reproduction has not been completed, step S26 is continued.

On the other hand, when the reproduction is completed, the microcomputer 1
n is the maximum DISC NO. Is determined (step S27). If the answer is no, n is incremented by 1 (step S28) and step S22
Return to On the other hand, if the answer is yes, the work ends.

[0050]

According to the disk reproducing apparatus of the present invention, D
Since the TS information is automatically determined and stored, there is no need for the user to input the information. Further, since the DTS determination can be performed when the TOC information of the disk is read (at the time of reproducing the disk), it is possible to prevent the DTS disk from being erroneously reproduced and generating noise.

Further, even if the receiver connected to the disc reproducing apparatus is switched from the input mode for receiving the analog output of the disc reproducing apparatus to the input mode for receiving the digital output or vice versa, On the playback device side, DTS disks can be handled with one key.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a disc reproducing apparatus according to the present invention.

FIG. 2 is a diagram illustrating an example of determination data stored in a RAM in the block diagram of FIG. 1;

FIG. 3 is a flowchart illustrating an example of a DTS determination process for storing DTS determination data in a RAM in the block diagram of FIG. 1;

FIG. 4 is a flowchart showing an operation of reproducing a disc other than a DTS disc by a “DTS disc skip” function in the block diagram of FIG. 1;

FIG. 5 is a flowchart showing an operation of reproducing a DTS disk by a “DTS disk reproduction” function in the block diagram of FIG. 1;

FIG. 6 is a flowchart illustrating an operation of registering and deleting DTS disk data by a user in a conventional disk reproducing apparatus.

FIG. 7 is a diagram illustrating an example of DTS disk data stored in a RAM by the DTS determination processing of FIG. 6;

[Description of Signs] 1 Microcomputer (control means, discriminating means) 2 Changer mechanism (reproducing means) 9 DTS decoder (DTS decoding means, discriminating means) 11 RAM (storage means)

Claims (2)

[Claims] 1. A reproducing means for selectively reproducing a disk from a plurality of stored disks, a control means for controlling a reproducing operation of the reproducing means, and the DTS based on DTS information included in a disk reproduction signal. DT for storing information
Discriminating means for discriminating the S disk; and storage means for storing a result of the discrimination by the discriminating means. D above
A disc reproducing apparatus for automatically skipping a TS disc and playing back a disc other than the DTS disc. 2. A reproducing means for selectively reproducing a disk from a plurality of stored disks, a control means for controlling a reproducing operation of the reproducing means, and a DTS decoding for decoding DTS information contained in a disk reproduction signal. Means, based on the DTS information from the DTS decoding means,
A discriminating unit for discriminating a DTS disc storing the DTS information; and a storage unit for storing a discrimination result by the discriminating unit. The control unit, when the disc is reproduced by the reproducing unit, stores the disc stored in the storage unit. A disc reproducing apparatus, which controls to select and reproduce only the DTS disc among the discs based on a determination result.