JPS5940360A - Disk record reproducer - Google Patents

Abstract

PURPOSE:To simplify the operation of a disk record reproducer, by performing program searching for the desired music with a composite operation of numerical switches and a pause switch and a setting a pause state immediately after the end of said program searching. CONSTITUTION:If (0)-(9) numerical switches 311-320 are operated independently of each other, a numerical key input control signal is supplied to a numerical key input control signal input terminal T2 of a control circuit 201 via an AND gate 327 by a set output Q given from the 2nd flip-flop circuit 323 which is set via an OR gate 326 and a reset output Q of the 1st flip-flop circuit 322. As a result, only a digit key process (in memory operation state) is carried out as if the numerical key input data were fetched to a numerical key input data bus T3 of the circuit 201 without having a searching operation. That is, a pickup 207 is shifted to a corresponding curved part on a disk 206 by transmitting a signal necessary for searching of a desired address to a disk reproduction system 202 from the circuit 201 via an external control circuit 203.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a disc record playback device suitable for, for example, a CD (optical compact disc) system DAD (digital audio disc), and particularly relates to a control system thereof. .

[Technical background of the invention and its problems]

Recently, in the field of sound IEL'B devices, a digital recording and reproducing method using PCM (pulse code modulation) technology is being adopted in order to achieve high fidelity reproduction as possible.

In other words, this is what is called denotal audio, and the audio characteristics do not depend on the characteristics of the recording medium, making them far 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. Regardless of which method is adopted, the playback device that embodies it must be able to satisfy various advanced control functions and performance that are not found in conventional υ devices. There is.

In other words, if we take the CD system as an example,
CLV' (Linear Velocity Approximately 500 to 2 depending on the method (fixed)
It is driven to rotate at variable rotational speeds of 00r, p, m, and reproduced in a linear tracking style from the inner circumferential side to the outer circumferential side using an optical pickup with a built-in semiconductor laser and photoelectric conversion element. However, this disc has a track pitch of 1.6 μm, and a huge amount of information that can be played in stereo for about 1 hour on one side is recorded in the program area (radius 25 to 58 mm) in digitized form along with address data. In addition, the maximum and minimum song number data, etc. are displayed in the lead-in area (radius 23
This can easily be seen from the fact that it has been digitized and recorded in 25 ntm).

However, since this conventionally known glazed disc record playback device has not yet been realized with excellent operability and display performance to satisfy its advanced control functions, there is an urgent need to This was seen as an issue that needed to be solved.

[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 reproduces a disc record in which a plurality of data to be reproduced and their address data are both digitized and recorded, and the desired reproduction of the plurality of data to be reproduced is performed. A first means for specifying an address, a second means for obtaining a pause state at the time of the operation, and a combined operation state of specifying the desired address data by the first means and a pause operation by the second means. and third means for searching for the address of and placing it in a pause state.

[Embodiments of the invention]

First, an outline of a CD-based DAI) playback device to which the present invention is applied will be explained.

That is, FIG. 1 shows a front external view, and 11 in the figure
Reference numeral 1 denotes a Kangaru pocket-type disc loading section provided on the front surface of the cabit 110 so as to be openable and closable. and,
On the left side of the disk loading section 111, there are provided an EJECT key 112 for opening/closing the disk loading section and a power (POWF:, R) key 113 for connecting/disconnecting the power supply.

Further, on the upper right side of the disk loading section i11, there is a display section 114 for making various displays to be described later, a reverse (REV) key 115 for so-called backward operation, and a 7 first forward key (7) for fast forward operation.
FF) key 116 and the play (PL) key 116 for play operation.
AY) key 117 are provided. Similarly, in the middle row is NEX'l' PLAY, which will be described later.
Key 11B and REPEAT key 119
and the PAUSE key 120 and STOP (
5TOP) key 121 are provided. Similarly,
There are 12 number keys at the bottom: 0, ], , 2...9
2 to 131 and memory read (M READ) key 13
2, a MEMORY key 133, and a CLEAR key 134.

Then, the above-mentioned display section 114 displays the eject (EJEC)
T) Display 114a, Search (SEARCH) display 114bS (ERROR) display 114, CN repeat (REPEAT) display 114d, Manual (
MANIJAL) display 114j, auto play (AU
TO) display 114e, MEMORY display 114f and 8 channel memory indicator (
MEMORY INDICATOR) 114 g,
Song number (MUSIC No.) display 114h and time (T
An IME) display 114 is provided.

Note that the play (PLAY) key 117 and PAUSE key 120 are also pressed.
The AY) display 114 and a PAUSE display 114t are provided.

FIG. 2 shows the electric circuit system of the CD type DAD playback device shown in FIG.
134, the disk reproduction thread 2θ2 is controlled to a predetermined state via a control circuit 201 comprising a microcomputer, an interface circuit, etc., and the display section 114 described above is controlled.
It provides necessary indications.

That is, in the disc reproduction system 2θ2, when the disc motor 204 and pickup feed motor 205 are driven from the control circuit 201 via the external control circuit 203, the data recorded on the disc 206 is regenerated by the pickup 207, and the reproduction signal is generated. The RF signal detection circuit 20
Send it to 8. This RF signal detection circuit 208 supplies a reproduction signal to a servo circuit 209 and a demodulation circuit 210.
Separate the signal to be supplied to the

Here, the servo circuit 209 performs focus servo and tracking servo for the pickup 207, and also performs a linear tracking servo for the pickup feed motor 205. Each country is sending out a signal that makes it possible to do so.

Further, the demodulation circuit 210 separates a synchronization signal for address detection from the reproduced signal, and transmits the synchronization signal to the address detector 2.
11, and the reproduced signal from which the synchronizing signal has been separated is demodulated (EFM) and supplied to the D/A converter 212.

Then, the address signal detected by the address detector 211 is taken into the RAM 213 via the control circuit 201, and is used to perform necessary control functions.

In addition, the reproduced data returned to an analog signal by the I)/A converter 212 is subjected to necessary error correction, deinterleaving, error correction, etc., and then used to drive the speaker 216 to produce sound. It will be done.

In FIG. 2, 214 is a ROM for driving the control circuit 20 with a predetermined program, and 215 is a display output control circuit for driving the display section 114 in a predetermined state.

Next, each key 11 in FIG. 1 and FIG.
2, 115 to 134 and the functions of the display section 114 will be explained.

[Number (0-9) keys 122-131] These are keys for inputting numbers, and are used when specifying a playback song during a search (searching the beginning) and when writing to the memory.

[MEMORY key 133] Numeric key is used to write data to the memory channel.

[CLEAR key 134] This key is used to change the song number display 114h, which is currently displaying the above-mentioned numeric key data, to the original song number (address) display.

Note that when the memory read (M READ) key 132 and the clear (CLEAR) key 134 are operated at the same time, a memory all clear (AI, L CLEAR) operating state is entered.

[Memory read (M READ) key 132] Used to read the written contents of the memory channel.

(REPEAT) key
-1 1 9] 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.

[PLAY key 117] This key is used both when used alone and for memory read (M
READ) key 132 or number (0-9) key 12
There are cases where the operation is performed subsequent to operations 2 to 131.

First, when used alone, the manual play mode is set, and if the state immediately before operating this key is a pause state, which will be described later, the pause state is canceled and the play state is entered. However, if the state immediately before operating the key was in the play state in the auto play mode (described later), the key will shift to the manual play mode, and if the key is operated during a search operation, it will return to the play state after the search is completed. It is made to be.

When used in combination with the memory read (M REAL) key 132 or the number (0 to 9) keys 122 to 131, the auto play mode and city search operation state are entered, and the play state is entered after the search is completed. ing.

Please note that an error (ER), which will be described later, occurs immediately before operating this key.
If the ROR display 114c is blinking, this key has the same operation as the CLEAR key 134.

[PAUSE key 120] When this key is used alone and when it is operated following the operation of the memo IJ IJ-D (M READ) key 132 or number (0 to 9) keys 122 to 131. There is.

First, when used alone, 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.

When used in combination with the memory read (M READ) key 132 or the numeric (0-9) keys 122-131, a search operation state is entered.

Please note that an error (ERROR) occurs immediately before operating this key.
If the display 114C is blinking, this key has the same operation as the CLEAR key 134.

[NEXT PLAY key 118]
First, when this key is operated in the manual play mode, a search operation is performed with the next song (actually, the next TNO track number) as the target address.

If this key is operated in the auto gray mode, a search operation is performed to set the contents of the next memory channel as the target address.

Furthermore, if this key is operated during a search operation, the search operation will be performed with the target address being the TNO next to the displayed TNO in manual play mode, and the next memory in the display memory channel if in auto gray mode. A single search operation is performed using the channel contents as the target address.

Note that this key operation does not cause a transition between the play/pause state.

[Fast forward (FF) key 116] When this key is operated, a forward operation is started.

Nao, if you operate this key in auto gray mode,
A forward operation is performed during operation, but if the position at which the operation is stopped deviates from the current song, a search operation for the next memory channel is performed.

[Reverse (REV)='1--1153 When this key is operated, packed word operation is started.

Note that when a backward operation is performed in the auto play mode, if the stop position deviates from the song being played, a search operation is performed for the previous memory channel.

[STOP key 121] When this key is operated, a transition is made to manual gray mode, and after the first song search is performed, a pause state is entered. However, this does not apply when the player is in a pause state at the beginning of the first track.O [EJECT key 112] If this key is operated during playback, the playback state will be canceled, the disc motor will stop, and the player will start playing. The disc loading section 11 is opened about one second after the dediode is turned off and the big ag returns to the starting position.

In addition, when operating each key mentioned above, a so-called CI (IRP sound (approx.
(output for 0.072 seconds) is generated.

[EJECT indicator 114m] After the EJECT key 112 is operated, it flashes at a frequency of about 3 Hz until the pickup returns to the starting position. It lights up when the disc loading section 11 is opened, and the disc loading section 1
When 11 is closed, the light is turned off.

[Search (SEARCH) display 114b] If all the TOC (table on content) data recorded on the disk as index data or in the doin area is read normally, fish with the search for the first song completed. It is done like this.

[Error (ERROR) indicator 114c] Lights up for about 0.67 seconds when an error described below occurs, and lights up for about 0.33 seconds 11A1
The light blinks at a frequency of about IHz, but it goes out when about 10 seconds have elapsed since the start of blinking or when the CLEAR key 134 is operated.

And, the error occurrence condition is ■ When approximately 20 seconds have passed since the disc was set upside down ■ A search operation was commanded using the number (0 to 9) keys 122 to 131, but the specified TNO does not exist on the disc. Case ■Memory read (M READ) key 132 or next play (NEXT PLA) in auto play mode
Y) When a search operation is commanded by operating key 11B, but the TNO of the specified memory channel contents does not exist on the disk. If it is determined that the memory does not exist, ■ If the search operation is not completed even after 20 seconds have passed after the start of the search operation, ■ If it is 17 when trying to write TNO=00 as memory channel data, etc.

[REPEAT indicator 114d] You can fish while the repeat function is on.

[Manual (MANtJAL) display 114j] Lights up when the MANUAL is in the 9 o'clock mode or in the EQ mode, and blinks while reading the lead-in area (approximately 3 hours).
z period).

[Auto play (AUTO) indicator 114e] This indicator lights up when in the auto play mode.

[MEMORY display 114f] Numbers (0~
9) When the keys 122 to 131 are operated, the light is turned on when memory writing is possible, and the light is turned off after about 10 seconds or when a key other than the numeric keys is operated.

[Memory indicator (Escape MORY INI) ICAT
OR) 114g] In this case, the portion corresponding to the memory channel that has 8 channels and is written in is lit in all states.

Still, in the auto play mode, the part corresponding to the memory channel being played back blinks (at a frequency of about 3 Hz).

When you operate the number (0 to 9) keys 122 to 131, the part corresponding to the memory channel with the lowest number that can be written will blink (approximately 3H
z period).

Furthermore, when the memory read (M READ) key 133 is operated, a portion corresponding to the memory channel being read out flashes (at a cycle of about 3 Hz).

[Music number (MUSIC No.) display 114h and time (
TIME) Display 1141] These are composed of a total of 8 digit numerical displays, and are collectively called an address (data) display section. In other words, two digits each from the left are TNO and X.

They represent MIN (minutes) and SEC (seconds), and in the eject mode, all lights are off, and in the playback mode, the address being played is displayed.

Also, if you operate the number (0-9) keys 122-131 or the memory read (M READ) key 133,
Only NO and X are displayed, and MI, N and SEC (time elapsed from the beginning of the first song) are blanked.

During the search operation, TNO and X are flattened, and MIN and SEC are blanked.

[PLAY indicator 114k] Lights up when the play mode is on.

[PAUSE indicator 1141] Lights up during the pause mode.

Next, an embodiment of the present invention based on the above-mentioned outline will be explained. In this invention, 75' is searched for the beginning of the desired song, and after the search is completed, it is immediately put into a pause state. It has the following characteristics.

That is, as shown in FIG. 3, in which the same reference numerals are given to the parts that will be obsolete in the same way as in FIG. 1
31) and the pause switch 321 (corresponding to 120 in FIGS. 1 and 2), if the pause switch 321 is operated alone, the first flip-flop circuit 32
2 set output Q and the second flip-flop circuit 323
As a result of the pause control signal being supplied to the pause control signal input terminal T1 of the control circuit 201 described above through the reset output Q and the digital signal 324 and the digital signal input terminal 325, the pause control signal is supplied to the pause control signal input terminal T1 of the control circuit 201 described above. It becomes a normal pause (pause) state.

If the numerical switches 311 to 320 (0 to 9) are operated independently, the set output Q of the second flip-flop circuit 323 and the first flip-flop circuit 322 are set via the OR gate 326. As a result of the reset output Q of the control circuit 20, a numeric key manual control signal is supplied to the numeric key manual control signal input terminal T2 of the control circuit 20 via the AND/DART 327. Numeric key human power data bus T
Only numeric key processing (during memory operation, etc.) such as inputting manual data to the numeric keys for 3 is performed.

Therefore, the number switches 311 to 32 (0 to 9)
If the pause switch 321 is operated in a complex manner after the 0 operation, the search control signal input to the control circuit 201 is caused by each set output Q of the first and second flip-flop circuits 322 and 323 via the AND dart 328. As a result of the search control signal being supplied to terminal T4, a search operation state is entered in which the previously fetched numeric key manual data is the target address.

One? ! As described above, the control circuit 201 sends a signal necessary for searching for the target address to the disc playback system 202 via the external control circuit 203, thereby causing the pickup 207 to play on the disc 206. This allows the user to move to the corresponding song section.

When the target address is searched, a search completion detection circuit 329 actually provided in the control circuit 201
A search end detection signal is output from. Then, this search completion detection signal and the first FRI, f frog circuit 322
As a result, a pause control signal is supplied to the pause control signal input terminal TI of the control circuit 201 via the set output Q of the digital &''-to 330 and the ordart 325, resulting in a pause state immediately at the search completion position.

In this case, the search end detection signal is also used to reset the first and second flip-flop circuits 322 and 323 via a delay circuit 331 to ensure a pause state.

In addition, in Figure 3, the number switches (0 to 9) and +4
? The switches corresponding to the operation keys other than the -Z switch are not shown for the sake of simplicity, but they are actually provided in the same way as those shown in FIG. 2.

Ie, number switch and month as above? −
By configuring the system so that a search for the beginning of a desired song is performed by a combined operation of the zoom switch, and the pause state is entered immediately after the search is completed, this is compared to the case where this is achieved by individual operations each time. The operation can be simplified by eliminating the complexity of the operation, and the pause state can be set in a state where the beginning of the desired song can be reliably played by eliminating the deviation of the cue position due to the delay time of the operation timing. Moreover, the number switch and pause switch each have the advantage of being able to perform the original control operation by operating them individually.
It can be said that this invention has a highly advanced control function and can contribute to improved operability.The present invention is not limited to the embodiments described above and illustrated, and may depart from the gist of the invention. It goes without saying that various modifications and applications are possible within an unlimited range.

〔Effect of the invention〕

Therefore, as detailed above, according to the present invention, it is possible to improve a disc record playback device that plays back a disc containing digitized data in such a way 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]

1 and 2 are a front external view showing a CD type DAD playback device to which the disc record playback device according to the present invention is applied, and a block configuration diagram showing its electric circuit system, and FIG. 3 is a block diagram showing an electric circuit system thereof. FIG. 2 is a block configuration diagram of main parts showing an embodiment. 110... Cabinet, 111... Disk loading section, 112... Eject key, 113... Power key, 114... Display section, 115... Reverse key, 1
26...First forward key, 117...Play key, l18...Next gray key, 119.
・Repeat key, 120 ・Morozuki key, 121・
・・Stozzo key, 122-13・・Number key, 1
32...Memory read key, 133...Memory key,
134... Clear, 114a... Inoect indicator, 114b... Search indicator, 114c... Error indicator, 114d... Repeat indicator, 114e...
・Auto play display, 114f...Memory display,
114g ・Memory indicator, 114h... Track number indicator, 1141... Time indicator, 114j...
Manual display, 114k...Play display, 114
t...Pause indicator, 201/Control circuit, 202...
・Disc playback system, 2OS...external control circuit, 204
. . . Disc motor, 205 . 211...Atoq
212...D/A converter, 213...R
AMN214...ROM, 27.5...Display output control circuit, 216...Speaker, 311-320...
Number switch, 32... Pause switch, 322.
323... Free lag flop circuit, 324°327.
328, 330...and dirt, 325°326.
...OR gate, 329...Search end detection circuit.

Claims (1)

[Claims] In a disc record playback device that plays back a disc record in which a plurality of data to be reproduced and their address data are both digitized and recorded, a first operation for specifying desired address data of the plurality of data to be reproduced; a means for searching for a designated address in a combined operation state of a designating operation of the desired address data by the first means and a pause operation by the second means; ,I? - third means for bringing the disk record into a blank state.