JPS6180658A - Disk record reproducing device - Google Patents

Abstract

PURPOSE:To display securely a highly-advanced control function with a simple constitution and to improve the operability by providing the 1st and 2nd disk mounting parts, disk reproduction drive means, reproduction command means and the 1st and 2nd control means. CONSTITUTION:A double CD player is constituted in such a way that it can take the necessary prescribed reproduction mode with respect to two disk mounting parts with the aid of one disk drive reproduction part. A and B tray motors 231 and 232 provided relating to A and B disk mounting parts 110 and 111, A and B disk sensors 233 and 234, mechanical unit up/down motor 235, mechanical unit up limit switch 236, mechanical unit down limit switch 237, mechanical unit position detection switches 238 and 239 and A and B disk mounting part opening/closing detectors 240 and 241 are so constituted to execute transmission and reception of a necessary control signal with respect to an I/O interface circuit 203.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to, for example, a CD (optical consect disc).
The present invention relates to a disk record playback bag h' suitable for DAD (digital audio disc), and particularly to its control system.

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, a desotal recording and reproducing method using PCM (-#Russian code modulation) technology is being adopted in order to achieve as high fidelity and anonymous reproduction as possible.

In other words, this is what is called digital audio, and the audio characteristics do not depend on the characteristics of the recording medium and are much superior to those using conventional analog recording and playback methods. This is because it is established in principle.

In this case, a system that uses a disk as a recording medium is called a DAD system, and optical, electrostatic, and mechanical recording and reproducing methods have been proposed. Even when adopting this method, the playback device that embodies it is required to be able to satisfy various advanced control functions and performance that are not found in conventional devices. .

In other words, if we take the CD system as an example,
CLV (Linear Velocity) is a disk made by coating a transparent resin disk with a diameter of 12 crn and a thickness of 1.2 cm with a metal thin film that forms ridges and grooves (irregularities with different reflectances) corresponding to PCM data. Approximately 500 to 200 depending on the method
It rotates and drives at variable rotational speeds of r, p, and m, and reproduces it in a linear tracking style from the inner circumference to the outer circumference using an optical pickup with a built-in semiconductor radar and photoelectric conversion element. The disk has a pitch of 1.6 μm, and a huge amount of information that can be played in stereo for about an hour on one side is digitized and recorded in the program area (radius 25 to 58 mm) along with address data. This can easily be seen from the fact that the maximum and minimum song number data, etc. are digitized and recorded in the lead-in area (radius 23 to 25 meters).

However, this type of disc record playback device, which has been known in the past, has not been developed with excellent operability and display performance to satisfy its advanced control functions. It was believed that this was an issue that needed to be solved.

In particular, conventional CD players have only one disk loading section for one disk drive playback section, and each time one disk is finished playing, another disk must be newly loaded. The problem with this method is that it is not possible to perform an organic continuous playback operation or arbitrary playback operation that has a certain relationship with the disc, and the operability is severely impaired.

In addition, recently, CD players also have so-called Tsuyu♂
Although it has been considered to be applied to commercial multi-F4 disc playback devices such as boxes and karaoke machines, it is only considering a form suitable for that kind of use, and it is not possible to The company was unable to respond to requests for improved operability and ease of use.

[Purpose of the invention]

Therefore, this invention was made in view of the above points, and is particularly applicable to a disc record playback device that plays back a disc on which digitized data is recorded.
It is an object of the present invention to provide an extremely good disc record reproducing device which has been improved so that it can reliably perform advanced control functions with a simple configuration, thereby contributing to improved operability.

[Summary of the invention]

That is, the disc record reproducing apparatus according to the present invention is a disc record reproducing apparatus for reproducing a disc in which a plurality of data to be reproduced and their address data have been both digitized and recorded. and a disk external drive means for selectively putting one of the disks loaded in the first and second disk loading sections into a reproduction driving state, a reproduction disk command means for giving a reproduction command to the disk reproduction YG driving means to select and reproduce which of the disks to be played; When a playback command is given to a non-selected disc by the playback disc command means when the disc is in the playback drive state where the disc is selected, the playback command is issued! a first control means that accepts only the first time of the playback command and supplies it to the disk playback drive means, thereby determining whether or not the non-selected disk is loaded and storing it; and for the second and subsequent times of the playback command The apparatus is characterized by comprising a second control means for reading out the contents stored by the first control means and controlling so as not to accept the second and subsequent reproduction commands if the content is not read out.

[Embodiments of the invention]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a CD type disc record reproducing apparatus to which the present invention is applied will be described below in detail with reference to the drawings.

That is, Fig. 1 shows the front external view of a double CD player that can selectively play two discs in any format, and the cabinet lo0.
A and B disk loading sections 11θ and 111, which are horizontal loader types, are provided on the left and right sides of the central front surface of the disk drive unit, and are openable and closable. These people and the B disk loading section 110
, 11 At the top of each Z are the A and B disk loading sections 110 and 111 (EJECT) for opening and closing.
Keys 133 and 134 are provided, as well as A and B trays (A-TRAY).

B-TRAY) indicators 135h, 135b and A and B (track number) track number indicators 135g, 135h for channels 1 to 12, respectively, are provided.

Further, a power key 112 for connecting and disconnecting the power is provided at the bottom of the A disk loading section 110, as well as numeric keys 113 to 122 of θ to 9 and an A-MEMORY key 123. It is provided.

At the bottom of the B-disk loading section 111 are a B-MEMORY key 124, a rear (CLEAR) key 125, and a repeat (REP) key 124.
EAT) key 126 and a repeat indicator 1351 are provided.

Further, on the top of the B disk loading section 111, a track number (TNO, Displayed track number/time indicator 135f and display (
A DISPLAY ) key 127 is provided.

Further, on the right side of the B disk loading section 111, there are A and B playback (A-PLAY, B-PLAY) keys 12.
8゜129, PAUSE key 1301 UP key 131 and DOWN key 1
32 are provided.

FIG. 2 shows the electric circuit system of the double CD player shown in FIG. is the input/output (I
lo) It is configured to control the disc playback system 202, which will be described later, to a predetermined state via the interface 203, and to make necessary displays on the displays 22 and 135, including the aforementioned display devices 135a to 1351. It is.

That is, assuming that the disc 206 loaded in the A-disk loading section 110 is to be played back, the disc playback system 202 will be driven in response to a cylinder control signal from the I10 interface 203. First of all,
Mechauni.

When the disk motor 204 and pickup feed motor 205 included in the disk 200 are driven, the pickup 207 reproduces the data recorded on the disk 206 and sends the reproduced signal to the RF signal detection circuit 20B. It is done as follows.

Here, the RF signal detection circuit 20B is not an IJ circuit, and the above reproduced signal is generated by two circuits, which will be described later. circuit 22
0.221 and a signal supplied to the waveform shaping circuit 222. Of these, the focus serge circuit 221 performs focus serge on the pickup 207, and the tracking therme circuit 220 performs tracking surge on the pickup 207, and also performs a tracking surge on the pickup feed motor 205. It is designed to send out various controls for controlling the linear tracking sensor.

Then, the reproduction (R
F) Signal directly and phase locked loop circuit 223
The signal is supplied to a first signal processing circuit 224 which mainly performs synchronization signal separation, EFM demodulation, and subcode decoding for address detection. Among these, the detected address signal is passed through the address signal path 211 to the interface circuit 20.7 and the microderosse.
A table of contents (TOC) in the lead-in area on disk 206 is supplied to
), the data is stored in RAM by the operation described below.
213 and is used to perform necessary control functions such as a search function. Also, it b
'-Address data (track number, time, etc.) in the program area on the disk 206 can be used for necessary display.

Furthermore, the EFM demodulated playback signal is converted into a digital audio signal by a second signal processing circuit 226 that cooperates with the memory 225 to perform necessary signal processing such as de-interleaving, error correction, and error correction. At the same time, it is returned to an analog signal by the D/A conversion circuit 212, and then an analog switch 215L for channel separation is connected to L/.
, 215R, low-pass filter 216L.

216B, f-emphasis control amplifier 217
L, 217R via speaker 218L.

It is designed to be used to drive the 218R.

Note that the ROM 214 is written with program data for driving the microprocessor 201 according to a predetermined program.

The functions of the disc playback system 202 as described above are B.
A similar relationship is established for the discs loaded in the disc loading section 111, and in this case, the mechanical unit r2oo described above is connected to the mechanical unit Ai controlled by the control signal from the I10 interface circuit 203. It is necessary to move it toward the B disk loading section 111 by the B movement motor 230.

A double CD pre-key according to an embodiment of the present invention is configured such that a single disk drive playback section can take a predetermined playback mode as required for two disk loading sections. .

In addition, in FIG. 2, A and B tray motors 231 and 232 and A and B disk sensors 2 provided in connection with the A and B disk loading sections 110 and 111 are shown.
,? J, 2 J4, mechanical unit up/down motor 235, mechanical unit up and down limit switches 236° 237, mechanical unit position detection switch 238° 239, and A and B disk loading section closed detectors 240 and 241 are I10 interface circuits. 203 so that necessary control signals can be sent and received.

Next, each of the keys 113 to 113 described above based on FIG. 1 and FIG.
134 and the functions that can be achieved by each of the displays 135a to 1351 will be described.

<A disk loading section eject (EJECT) key 13
3> If this key is operated during playback of a disk loaded in the A disk loading section 110, the playback state is canceled, and the dipask motor 204 is stopped via the microprocessor 20 and the interface circuit 203. The radar diode in the pickup was turned off and the pickup was 7.
' After 207 returns to the starting position, the disk loading section 11
0 is open. Also, the disk loading section 11
If this key is operated with 0 open, the disk loading section 110 will close.

Disc loading section EJECT key 13
4> Lateral Ejection of Inserted Disk Loading) The same function as the (EJECT) key 133 is performed for the 87' disk loading section 111.

Numbers (0 to 9) -113 to 122> Keys for inputting numbers, used for specifying playback songs when searching (searching for the beginning), saving to memory, and erasing.

<A-MEMORY key 123> RAFil the numeric key data! It is used when writing to or erasing the A memory channel in 213.

B-Memory (B-MORY) key 124> Numerical key Used to write or erase data in the B memory channel in the RAM 213.

CLEAR key 125> This key is used to change the song number display 135f, which is currently displaying the above-mentioned numeric key data, to the original song number (atres, time) display.

Note that if the A MEMORY key 123 and the clear (CIJAR) key 125 are operated at the same time, the A MEMORY ALL clear (A MEMORY ALL
CLEAR).

Furthermore, if the B MEMORY key 124 and the CLEAR key 125 are operated at the same time, a B MEMORY ALL clear is executed.
CLEAR).

REPEAT key 126> Repeat (repeated playback) is turned on and off each time this key is operated.

However, the repeat function is off when the power is turned on.

Display (DfSPLAY) key 127> Each time this key is operated, the display on the track number/time display 135f changes between the track number and index number (TNO).
, X ), - song elapsed time (I, AP TIM
E) Furthermore, the synchronized recording time (RECORD-■NG T
IME).

A-PLAY key 128〉This key can be used alone or as a number (0-9) key 113.
In some cases, the operation may be performed subsequent to the operations in steps 122 to 122.

First, when used alone, if the state immediately before operating this key is a pause state as a manial delay mode, the pause state is canceled and the A play state is established.

When used in combination with the numeric keys 113-122 (O-9), a search operation state is entered, and after the search is completed, a forward play state is entered.

<B-PLAY key 129> This key operates in the same way as the A-PLAY key 128, except that it finally enters the B-PLAY state.

PAUSE key 13Q If the state immediately before operating this key is the play state, the play state is canceled and the pause state is entered. Furthermore, if the operation is performed during a search operation, the pause state is entered after the search is completed.

Also, if the state immediately before operating this key is a pause state, the pause state is canceled, the radar diode being picked up is turned off, and the stop state is entered.

UP key 131> When this key is operated, a search operation is performed using the start address of the song corresponding to the TNO advanced by the number of times this operation section is pressed as the target address, and after the search is completed, the pre-search mode.

DaWN key 132〉 When this key is operated, the first operation will perform a search operation using the start address of the currently playing song as the target address, and after the search is completed, the mode will return to the mode before the search. . Furthermore, if operated during the search operation, the target address will be returned in TNO units equal to the number of times this operation section is pressed, in contrast to the case of the up operation section 13 described above.

A-TRAY Display 135m〉A-TRAY
It lights up when a tray is selected.

<B-TRAY indicator 135b> B-TRAY
It lights up when a tray is selected.

Track number (TNO) display 135c〉Track number
Lights up when the display mode of the time display 135f is the track number display.

LAP indicator 135rl) Lights up when the display mode of the track number/time indicator 135f is to display the elapsed time within one song.

〈RECORDING TIM
E) Display 135e') The display mode of the track number/time display 135f is [TOTAL].
] Lights up when the recording time is displayed.

Track Number/Time Display 135f> This is a four-digit numerical display, and is adapted to display the track number or time in accordance with the operation of the display key 127. In other words, the two digits from the left represent TNO and X when the song number is displayed, and minutes and X when the time is displayed.
It is designed to represent seconds.

A track number display 7.7s g :) In this case, it has 12 channels, and the channel number corresponds to TNO. A lamp corresponding to the memorized TNO is lit in the memorized field. During play, the lamp corresponding to the TNO being played flashes.

B track number display 135h> The same operation as the A track number display 135g is performed for the B tray.

REPEAT indicator 135 k) Lights up when the repeat function is on.

According to the double CD player having the above functions, the A and B7J disk loading sections 110, 1 are loaded in advance.
Simply load the desired discs into the 11 discs and specify the desired playback format, and the playback starts from one disc to the other (of course, it is also possible to play only the desired songs from each disc). It is extremely easy to use and has excellent operability, as it allows you to perform endless performances such as repeating the same sequence as many times as you like.

Next, a description will be given of control functions that are particularly taken into consideration in the embodiment of the double CD player as described above.

In other words, the control function here means that during the playback operation for the disc loaded in either of the above-mentioned write and B disk loading sections 110, 111, when a playback command is issued to the other disk loading section, The mechanical unit 200 serving as a disk reproducing and driving means is moved to the other disk loading section to perform, for example, the above-mentioned focus sensor? The mechanical unit 2 determines whether or not a disk is loaded in the disk loading section depending on whether or not the disk is inserted into the disk loading section.
This is a control function that prohibits the disk drive 00 from moving toward the other disk loading section.

This kind of control function is provided by the ROM mentioned above.
This is accomplished by the microprocessor 201 controlling each part of FIG. 2 to a predetermined state as described later in accordance with the flowchart shown in FIG. 3 according to a program written in the program 214.

First, for convenience of explanation, it is assumed that a playback operation has already been performed on the disc (hereinafter referred to as A disc) loaded in the disc loading section 110 before step (2) in FIG. 3, but in reality, The present invention is not limited to this, and may proceed to step (2) through preliminary steps 81 to S4.

For example, in the step ■ that precedes this, /(war(
When the POWER) key 117 is turned on, the above RAM
21 The contents of the predetermined addresses M and H of J are O.
It is assumed that initialization has been performed as shown below. During the playback of the A disk in the next step ■, a play command is given to the disk loaded in the other B disk loading m1ll (hereinafter referred to as B7'' disk) by operating the B play (PLAY) key 129 etc. in the next step ■. A judgment is made as to whether or not this has been done, and N.

If so, continue steps ■ and ■. Also, step ■
If the judgment is YES (including not only a reproduction command to the B disk but also a reproduction command to the B7'' disk by the above search operation and repeat operation), the microprocessor 201 stores the predetermined address M in the RAM 213.
Read the contents of [=l
Determine whether or not. The judgment in this step ■ is Y.
If ES, that is, M=1, it is assumed that the mechanical unit 200 has already been moved to the B disk loading section 211 at least once to check whether or not the B disk is loaded, and the process proceeds to the next step (2). This step ■ is R
It reads the contents of a predetermined address N in the AM 213 and judges whether N=1 or not. If the judgment result is YES, that is, N=1, then the B disk is loaded. Assuming that there is no disk, the process returns to step (3) and thereafter to continue the playback operation of disk A.

Therefore, which N
o That is, M=0. If N=O, the reproduction of the A disc is canceled in the next step (2), and then the mechanical unit 200 is moved to the B disc loading section 11) in the next step (2). After this movement is completed, in the next step (2), the disk motor 204 is driven, and preparations are made to apply a focus serge to the pickup 207 via the focus servo circuit 221, for example, to obtain a υ reproduction signal from the pickup 207. In the next step ■, it is determined whether a playback signal can be obtained or not. If YES, it means that disk B exists (corresponds to N=Q above), so proceed to the next step [phase]. After performing a predetermined search operation, the next step [phase] is to perform a playback operation for the B disk. On the other hand, if the determination in step (2) is No, the B disk is not present, and the mechanical unit 200 has never been moved to the B7J disk loading section 111 to check whether the B disk exists. (M=O above corresponds), so we proceeded to the next step (2) and memorized that the B disk did not exist by writing N=1 to a predetermined address N in the RAM 213. After that, in the next step 0, the operations of the disk motor 204 and pickup 207 are stopped, and the focuser ♂ is turned off. Also, when the above step ■ or ■ is completed, proceed to the next step ■ and write M=1 to the predetermined address M in the RAM Rrs to remember that the presence or absence of disk B has already been checked, and then proceed to the next step ■. For example, the process moves to step S4, which performs normal operations among the preliminary steps, deS, and %S.

By providing the above-mentioned control functions, a dedicated disk sensor (233, 234 mentioned above) is installed especially in both the A and B disk loading sections 110, 111.
The presence or absence of a disc can be checked by internal processing by the microprocessor 201 without the need to provide a disc (equivalent to 1). As well as being able to
By not accepting unnecessary reproduction commands thereafter, unnecessary movement of the mechanical unit 200 can be reduced.

Moreover, the mechanical and electrical loads on the mechanical unit 200 can thereby be reduced. Furthermore, the operability can be made extremely favorable without causing unnecessary interruption of the reproduction operation.

It goes without saying that this invention is not limited to the embodiment 11 described above and illustrated, and that various modifications and applications can be made without departing from the gist of the invention.

〔Effect of the invention〕

Therefore, as described in detail above, according to the present invention, it is possible to improve a disc record playback device that plays back a disc in which digitalized data is recorded, so that it can reliably perform advanced control functions with a simple configuration. death,
Therefore, it is possible to provide an extremely good disc record playback device that contributes to improved operability.

[Brief explanation of drawings]

Fig. 1 is a front external view showing an embodiment of a disc record playback device according to the present invention, Fig. 2 is a block configuration diagram showing an electric circuit system of the embodiment, and Fig. 3 is a main part of the embodiment. It is a flowchart for explaining a function. 113-134... Input operation jack, 135a-13
51...Various indicators, 201...Fukuro de Rose,
203...I10 interface circuit, 213
...RAM, 214...ROM,...? 02... Disc playback system, 110.111... Disc loading section,
2θθ...Mechanical unit for disc playback drive.

Claims (1)

[Claims] A disc record playback device that plays back a disc on which a plurality of pieces of data to be played and their address data are both digitized and recorded includes first and second disc loading sections; a disc playback drive means for selectively putting either one of the discs loaded in the disc loading unit into a playback driving state; and a disc playback drive means for selectively driving one of the discs loaded in the first or second disc loading unit for reproduction. a playback disk command means for giving a playback command to the disk playback driving means; and when the disk playback drive means is in a playback driving state in which a disk loaded in one of the disk loading sections is selected, the playback disk command means When a playback command for a non-selected disk is given, the playback command is accepted only the first time and is given to the disk playback drive means, and it is determined based on this whether or not the non-selected disk is loaded. and for the second and subsequent reproduction commands, reads out the contents stored by the first control means, and if the content is not read out, the second and subsequent reproduction commands are not accepted. 1. A disc record playback device comprising: a second control means for controlling.