JPS6180663A - Disk record reproducing device - Google Patents

Abstract

PURPOSE:To display securely a highly-advanced control function and to improve the operability by providing a control means for giving a control signal which shifts a reproduction drive means to a central position between the 1st and 2nd disk mounting parts so as to stand by based on the detection signal of a clamp un-completion given from a detection means. CONSTITUTION:A microprocessor 201 judges through an I/O interface circuit 203 whether or not disks with respect to a disk A mounting part 110 and disk B mounting part 111 are clamped by a mechanical unit 200 based on the detection signal from a mechanical unit up limit switch 236 for becoming a clamp detection means, for instance. If the judgement is NO, a control signal is supplied to a movable motor 230 through the interface circuit 203 having a function as an external control circuit in order to shift and stand by the unit 200 to the central position between the A/B disk mounting parts 110 and 111.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to, for example, a CD (optical compact disc) type DAD (Digital Audio 5” 4-off).
The present invention relates to a disc record playback device suitable for use in a disc record playback device, and particularly to a control system thereof.

[Technical background of the invention and points of interest]

Recently, in the field of audio equipment, a digital recording and reproducing method using PCM (Russian code recording) technology is being adopted in order to reproduce the fidelity as much as possible.

This is called digital audio, and the audio characteristics do not depend on the characteristics of the recording medium, making them much more immersive than those using conventional analog recording and playback methods. This is because it has been established in principle.

In this case, a system that uses a disk as a recording medium is called a DAD system, and its recording and reproducing methods have been optical, electrostatic, and mechanical.
However, no matter which method is adopted, the playback device that implements it must satisfy various advanced control functions and performance that are not comparable to conventional ones. It is required that it be possible.

In other words, if we take the CD system as an example,
A disc made of a transparent resin disc with a diameter of 12 cm and a fill size of 1.2 cm, coated with a metal thin film that forms a pattern (concavities and convexities with different reflectances) corresponding to digital (PCM) data. i The CLV (Constant Linear Velocity) method is used to drive the rotation at variable rotational speeds of approximately 500 to 200 r, p, m, and an optical pickup built into the semiconductor radar and photoelectric conversion element is used to rotate from the inner circumferential side to the outer circumferential side. This is a linear tracking method for playback.
The disk has a diameter 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 along with address data in the program area (radius 25 to 58 mm). It is easy to know that these songs are recorded, and that the maximum and minimum song number data, etc., are digitized and recorded in the lead-in area (radius 23 to 25).

However, the conventionally known Gokudink record playback device VC6 is not easy to operate and does not have a rich display to satisfy its advanced control functions. 90 In particular, conventional CD players have only one disc loading unit for one disc drive playback unit, and each time one disc is finished playing, the other disc is loaded. Since the discs must be loaded into the Shintomo, operability is significantly impaired in that it is not possible to have a certain relationship with multiple disc buttons and perform organic continuous playback operations or arbitrary playback operations. The problem was that it would get lost.

In recent years, it has been considered that the so-called "Nuke" in CD players could be applied to professional multi-disc playback devices such as Kusu and karaoke machines, but this is a form that is only suitable for that type of use. However, it is not possible to meet the request for truly improving operability as mentioned above, and for improving usability.

[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 friend data is recorded.
The object of the present invention is 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 playback device according to the present invention is a disc record playback device that plays back a disc in which a plurality of data to be played back and their address data are both digitized and recorded. and a disk playback drive means for selectively granding either one of the disks loaded in the first and second disk loading sections to bring it into a playback driving state; detection means for detecting whether or not the clamping operation by the disc playback drive means has been completed for the disc that has been played;
Based on the unfinished detection signal given from the 7 runf 0 detection means, a control means provides a control signal for causing the playback drive means to move to a central position between the first and second disk loading sections and wait. It is characterized by comprising the following.

[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, so to speak, and shows the cabinet 10.
A horizontal loading type A is located on the left and right of the center front of the 0.
and B disk loading sections 110 and 111 are provided so as to be openable and closable. These people and the B disk loading section 110
．． 111, the above A and B disk loading portions 1 are installed.
10, 111 Eject keys 133, 134 for opening and closing are provided, and A and B tray (A-TRAY, B-TRAY) indicators 1
35 &, 135b and K respectively 1 to 12 channels of A and B (Tora).

Track number display devices 135g and 135b are provided.

At the bottom of the A disk loading m110, a /4' power (PCWER) key 112 for connecting/disconnecting the power is provided, as well as numeric keys 113 to 122 of 0 to 9 and A memory (A-1i11EMORY) 123. It is provided.

At the bottom of the B disk loading section 111 are a B memory (B-M 0RY) key 124 and a clear (C
IEAR) key 125 and repeat (Rlj:PE
AT ) key 126 and repeat indicator 1351 are provided 7).

Further, on the top of the B disk loading section 111, a tiger,
number (TNO,X) indicator 135c.

Lap (LAP) display 135d, total recording time (TOTAL) display 135*, 4-digit numerical track number/time display 135f, and display (
A DISPLAY) key 127 is provided.

Further, on the right side of the B disk loading section 11, there are A and B playback (A-PLAY, B-PLAY) keys 28° 129 and a pause (PAUSE) key 1301.
UP (UP) -? -131 Oh! Bidakuy (DO
WN) key 132 is provided.

FIG. 2 shows the electric circuit system of the double CD player shown in FIG. is the input/output (I
lo) Controls the disc playback system 202, which will be described later, to a predetermined state via the interface 203, and is configured to display the necessary information using the display units 135a to 135, which include the aforementioned display units 135a to 135. It is something that

That is, if the disk 206t loaded in the A disk loading section 110 is to be played back, the disk playback thread 202 will be driven in response to various controls &t1 from the I10 interface 203. First, when the f''4 drive motor 204 and the big drive motor 205 included in the mechanical unit 200 are driven, the pickup 201 picks up the disc 2.
Reproduce the data recorded in 06 and RF the reproduced signal.
The signal is sent to the signal detection circuit 208.

Here, the RF signal detection circuit 208 is not a matrix circuit, and the two circuits 220 and 220, which will be described later for the reproduction signal, are
Signals supplied to 221 and waveform shaping circuit 222! /I=It has a function of separating the signal to be supplied. this house,
The focus serge circuit 221 is the above Bi, Qua, De 207.
The focus sir is instructing the above, and the tracking sir I @ road 220 is instructing the tiger, king sir & i in the above-mentioned Bi, Kua, De 207, and the above-mentioned Pi, Kua, De sending simulator 205 is being made. The next reproduction (RF) signal supplied to the waveform shaping circuit 222 is transmitted directly and via the phase-locked loop circuit 223, mainly to the address control circuit 223. The signal is supplied to a first signal processing circuit 224 that performs synchronization signal separation, EFM demodulation, and subcode decoding for detection. The detected address signal is then supplied to the interface circuit 203 and the microprocessor 201 through the address signal bus 211, and is sent to the disk 206.
In the case of table-op-content (TOC) data in the lead-in area above, it is imported into the RAM 21J by operations described later, and is used to perform necessary control functions such as a search function.

Further, if it is address data in the program area on the disk 206 (such as track number 9 hours), it can be used to create a necessary display.

Furthermore, the EFM demodulated playback signal is converted into a digital audio signal by a second signal processing circuit 226, which cooperates with the memory 225 and performs necessary signal processing such as de-interleaving, error correction, and error correction. After being converted and returned to an analog signal by the D/A conversion circuit 212, the L4 channel separation analog switch 215L1
215R, Ronos filter 216L, 216B.

Emphasis control amplifier x 17L.

It is designed to be used to drive the speakers 218L and 218R to produce sounds via the 217R.

By the way, is ROM 2 J 4 Microderose? Program data for driving with all 20 predetermined programs is written.

The function of the disk reproducing thread 202 as described above is B.
A similar relationship is established for the disc loaded in the disc loading section 11. In this case, the mechanical unit 200 described above is controlled by the control signal from the I10 interface circuit 203. ”; It is necessary to move the B-disk loading section 111 by the B-movement motor 230.

In summary, the double CD delayer according to one embodiment of the present invention is configured such that a single disk drive playback section can obtain a predetermined playback mode as needed for two disk loading sections. .

In addition, in FIG. 2, the friend and B tray motors 231 and 232, the A and B disk sensors 23, and the B tray motors 231 and 232 provided in connection with the above-mentioned entry and B disk loading sections 110 and 111 are shown.
3,234. Mechanical unit, dedown motor 235,
Mechanical unit a, de and down limit switch 23
6゜237, mechanical unit position detection switch 238゜2
39 and A and B disk loading section open/close detector 240
, 241 are designed to be able to send and receive necessary control signals to and from the interface circuit 203.

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.

(EJECT) key 1
33> If this key is operated while a disc loaded in the A-disc loading unit 110 is being played, the playback state is canceled, and the disc motor 204 is stopped via the microprocessor 201 and interface circuit 203, and the disc is stopped during pickup. The radar diode is turned off and pickup 2
After the disc 02 returns to the starting position, the disc loading section 110 opens. Further, when this key t- is operated while the disk loading section 110 is open, the 7''4 disk loading section 110 is closed.

B Disc loading section EJECT key 1
34> A disk loading section EJECT key 1
The same function as 33 is performed for the iB disk loading side section 11.

Number (O-9) Keys 113-122 These are keys for inputting numbers, and are used for specifying playback songs during searches, convolution into memory, and erasing.

A-MEMORY key 123> This key is used to write and erase numerical key data in the A memory channel of the RAM 213.

<B-memory (B-MEMoRy) key 124> Numerical key Used when writing to or erasing data from the B memory channel in the fRAM 213.

CLEAR key 125> Track number display 135ff that is displaying the above numerical key data
Used to display the original song number (address, time).

In addition, when the A memory (AMEMORY) key 123 and the clear (CLEAR) key 125 are operated at the same time, the A memory all clear (A MORY ALL C box) operation state is established. In addition, the B MEMORY key 124 and the clear (CLE)
If AR] key 125 is operated at the same time, B memory all clear (B avoid MORY ALL CLEAR)
It is made to be in an operational state.

< REPEAT key 12
6 〉Repeat (repeat playback) every time this key is operated
It is designed to turn on and off.

However, when the power is turned on, the repeat function is in the off state.
From the display of - song elapsed time (LAP TIME)
) Furthermore, synchronized recording time (R to O immediately ING'l'IME
).

A・PLAY (A・PLAY) key 128〉This key is used both when used alone and when used as a number (0 to 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 this key is fully operated is a pause state, the pause state is canceled and the A-play state is entered.

When the numbers (0 to 9) keys and -113 to 122 are used in combination, the search operation state is entered, and after the search is completed, the A play state is entered.

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

PAUSE key 130 If the state immediately before operating this key is the play state, the play state is canceled and the pause state is entered. Additionally, if the user is operated during a search operation, the device enters a pause state after the search is completed.

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 for the start-dress all-purpose address of the song corresponding to the TNO advanced by the number of times this operation section is pressed, and the search operation is performed after the search is completed. Returns to previous mode.

DOWN key 132) When this key is operated, the first operation will perform a search operation that sets the start address of the currently playing song as the target address, and after the search is completed, the mode state before the search will be returned. become. Furthermore, when operated during the search operation, the above-mentioned up operation section 13
TN for the number of times you press this operation N' in contrast to the case of
The destination address will be returned in O units.

A-TRAY indicator 135h':
) It lights up when tray A is selected.

B-TRAY indicator 1.35 b
:> B. Lights up when tray is selected.

Track number (TNO) display 13.5c)
Lights up when the display mode of the track number/time display 135f is set to display the track number.

LAP indicator 135d> Lights up when the display mode of the track number/time indicator 135f is set to the elapsed time table for one song. .

RECORDING TIM
E) Display 135g5';> Is the display mode of the track number/time display 135f (TOTA
L] 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 t- in response to the operation of the disc gray key 127. In other words, each of the 92 digits from the left side represents TNO and X when the song number is displayed, and K so that it represents minutes and 9 seconds when the time is displayed.

<A) U, number indicator zssg> In this case, 12
It has seven channels and the channel number is TNO.
It corresponds to If the TNOK is memorized, the lamp corresponding to the memorized TNOK lights up. During play, the lamp corresponding to the TNO being played flashes.

(B) Track number display 135h>A Same operation as track number display 135g tB) Perform for rays.

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

In the case of a double CD player with a biased functional cost as described above, the A and B disc loading sections 110 and 11 must be installed in advance.
By simply loading the desired discs into each disc and adding the desired playback mode, you can play continuously from one disc playback to the other f'isk playback (of course, only the desired songs on each disc can be played back). It is very easy to use, as it allows you to perform endless performances by repeating it as many times as you want.

Next, what about a double CD player like the one above? [In the example 1. Particular consideration is given to the friend control feature.

In other words, the control functions here are A and B.
A state where the clamping operation by the mechanical unit 200 has not been completed for the disc on either side of the disc loading section IJ0, 111 (fc) Even if the disc is loaded, the clamping mechanism of the mechanical unit 200 will not be able to position it. (Including cases where the clamping operation is not performed and it is not possible to immediately switch to the regeneration drive state)
This is a function to control the mechanical unit 200 as a disk playback drive means so that it is always on standby at the center position between the A and B disk loading sections 110 and 111.

This kind of control function is provided by the friend ROM mentioned above.
2J4 is executed by controlling each part of the Wcz diagram to a predetermined state according to the flowchart shown in FIG.

First, after inputting the power, usually by performing the necessary key operations, the disc is put into play mode in the predetermined format as described above,
A predetermined operation such as displaying the address data will be executed. During these series of operations, the program shown in FIG. 3 is also constantly being executed, and is started by the start operation in step (2).

In the next steps ■ and ■, the A and B disk loading sections 11
Whether or not the disk corresponding to 0,111 is clamped by the mechanical unit 200 is determined based on a detection signal from a clamp detecting means such as the mechanical unit up limit switch 236 mentioned above. 201 makes the decision. If the judgment results in steps ■, ■, and ■ are all NO, then in the next step ■, mechanical unit,
o2h and B7'' isk loading@5110, 111 A friend control signal to move to the central position between 5110 and 111 and wait is sent to the mechanism A4 through the I10 interface circuit 203 which has the function as an external control circuit. n movement motor 230.Here, the center position between the A and B disk loading sections 110, 111 naturally refers to the movable range of the mechanical unit 200, that is, the center position of each of the A and B disk loading sections 110, 111. In the next step, f■, it is determined whether the mechanical unit 20 (t) has completed its movement to the center position. This may be done based on the detection signal from the mechanism A=B moving motor 230, but it is also possible by monitoring the sending of the control signal supplied to the mechanism A=B moving motor 230.Then, if the judgment result in step (2) is YES If so, proceed to the next step■
After the movement of the mechanical unit 200 is stopped, the next step (2) is set to an end (standby) state in which normal key operations are accepted.

In addition, the judgment results in steps ■ and ■ above are both Y.
If it is ES, it will immediately shift to step ■. Also,
If the judgment result in step ① is NO, then of course you should return to step ②.

In other words, by providing the above-described control function, the mechanical unit 2001f can be moved in the same amount of time even when a playback command is issued to a companion disk loaded on either side of the A or B disk loading section 110 or 111. Therefore, the operability can be improved by making it possible to enter the regeneration drive state of the r-isk.

However, if such a control function is not provided, the initial position of the mechanical unit 200 is normally the position according to the previous playback drive, and is therefore unstable. When there is a command to play a disc loaded in the disc loading section opposite to the one on which the disc is to be played, the mechanical unit 200f must be moved to the disc loading section to start playback so that it cannot enter the playback driving state. This leads to unreasonable operability in that it is not possible to uniquely regulate the time for mourning.

Note that in a state where any one of the ten thousand disks is clamped by the mechanical unit 200 as the f4 disk movement means, there is a high probability that the next playback command will be given to the disk in question; In such a case, it would be rather unreasonable to move the mechanical unit 200 to the central position, so the disk in question is mechanically moved until then.
It is in a standby state when it is clamped by L2 and G200.

It goes without saying that the present invention is not limited to the embodiments described above and illustrated, and that various modifications and applications can be made without departing from the spirit of the invention.

〔Effect of the invention〕

Therefore, as detailed above, according to the present invention, it is possible to reliably perform high-level control functions with a simple configuration, especially in a disc record playback device that plays back a disc on which digitized data is recorded. improved,
Therefore, it is possible to provide an extremely good disc record playback device that contributes to improved operability.

[Brief explanation of the drawing]

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. This is a flowchart to explain the function. 113-134... Input operation keys, 135a-13
51...Various displays, 201...Microprocessor, 203...I10 interface circuit, 213
...RAM, 2 J 4...ROM, 202...
- Disc playback system, 110, 111... Disk loading section, 200... Mechanical unit for driving disk playback. Applicant's agent Patent attorney Takehiko Suzue Figure 3■

Claims (1)

[Scope of Claim] 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, comprising a first and a second disc loading unit; and a disk playback drive means for selectively clamping one of the disks loaded in the second disk loading section to put it in a playback driving state;
detecting means for detecting whether or not the clamping operation by the disk reproducing drive means has been completed for the disk loaded in the first or second disk loading section; A disc record characterized by comprising: control means for supplying a control signal to the reproduction driving means to move the reproduction drive means to a central position between the first and second disc loading sections and to wait, based on the detection signal. playback device.