JPS5942671A - Disc record reproducing device - Google Patents

Abstract

PURPOSE:To exercise a high-grade control function surely with a simple constitution and to improve the operability, by providing a means, which reproduces automatically data to be reproduced corresponding to preset contents in a certain channel sequence, and a means which can operate selectively this reproducing state. CONSTITUTION:When a desired number of music numbers are preset to channels and the auto-play mode where preset musics are reproduced is set, a high-level detection signal is outputted from an auto-play mode detecting circuit 311 provided in a control circuit 201 to one input terminals of AND gates 312 and 313. In this state, when the musical performance of the last channel part is terminated, a high-level detection signal is outputted from a ending detection circuit 314 for last channel performance in the control circuit 201. Then, a playing channel data control signal is supplied from an AND gate 316 to a performance channel data control circuit 322 in the control circuit 201, and the re-performance from channel 1 is started.

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) type DAD (digital audio disc), and particularly relates to its control system. Suru.

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, a digital recording and reproducing method using PCM (Pulse Code Modulation, Rage Pin) technology is being adopted in order to reproduce the Hatake fidelity as much as possible.

This is called digital audio, and the audio and 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 that

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 reproducing device that embodies it is required to be able to satisfy various high-level mantra functions and performances that are not found in conventional devices. There is.

In other words, if we take the CD system as an example,
CLV (constant linear velocity) is a disk made by coating a transparent resin disk with a surface diameter of 12 cm and a thickness of 1.2 m with a metal thin film that forms bits (irregularities with different reflectances) corresponding to digital (PCM) data. Approximately 500 to 200 depending on method
It is driven to rotate at variable rotational speeds of r, p, and m, and is regenerated in a linear tracking style from the inner circumferential side to the outer circumferential side using an optical bi-quag equipped with a built-in semiconductor laser and photoelectric conversion element. However, the disc has a track width of 1.6 μm, and a huge amount of information is stored in the program area (which allows for approximately 1 hour of stereo playback on one side).
The address data is digitized and recorded in the lead-in area (radius 23 to 58), and the maximum and minimum song number data are digitized and recorded in the lead-in area (radius 23 to 25). This is an area that can be easily learned.

However, conventionally known disk record playback devices of this type have not yet been realized with excellent operability and display performance to satisfy the high-speed control function. It was considered an urgent problem 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 playback device according to the present invention is a disc record playback device that plays back a disc record in which a plurality of 17% raw data and their address data are both digitized and recorded. a first means for automatically reproducing data to be reproduced corresponding to the reset contents in a predetermined channel order by resetting a desired number of address data to a predetermined channel; and a reproducing state by the first means. and a second means for selecting the final channel state.

[Embodiments of the invention]

First, an outline of a CD-based DAD reproducing apparatus 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 capit 110 so as to be openable and closable. and,
On the left side of the disk loading section 111 are provided an eject key 112 for opening and closing the disk loading section and a POWER 113 for connecting and disconnecting the power supply.

In addition, on the upper right side of the disk loading section 111, there is a display section 114 for making various displays to be described later, a reverse (RE'V) key 115 for so-called pack word operation, and a 7 earth word (FF) key for fast forward operation.
) key 116 and the PLAY key 116 for play operation.
) 117 are provided. Similarly, in the middle row is the NEXT PLAY key 11, which will be described later.
8, repeat (REPEAT) key 119, pause (PAUSK) key 120 and strike (5TO)
P) key 121 is provided. Similarly, in the lower row there are number keys 122 to 131 of 0, 1° 2...9, a memory read (MREAD) key 132 and a memory (MREAD) key 132.
(2) A RY) key 133 and a CLEAR key 134 are provided.

Then, the above-mentioned display section 114 displays the eject (EJEC)
T) Display 114*, search (SEARC) I) Display 114b, error (ERROR) display 114a.

Repeat (REPEAT) display 114d, manual (MANUAL) display 114Js Auto play (AUTO) display z14es Memory (MELv[)
RY) Display 1141 and 8 channel memory indicator (MEMORY INDICATOR) 11
4g, a track number (MU81CNIL) display 114h, and a time (TI section) display 1141. In addition, a play (PLAY) key 117 and a pause (
PAUSE) Also played during Ghee 120 (PL
AY ) display 114 and a pause (PAUSg) display 114t are provided.

FIG. 2 shows the electric circuit system of the CD type DAD playback device shown in FIG.
134, the disc reproduction thread 202 is controlled to a predetermined state via the control circuit 201 comprising a microcomputer, an interface circuit, etc., and the display section 114 described above is controlled. The necessary display is made according to the following.

That is, in the disc reproducing system 202, when the disc motor 204 and the big drive/f feed motor 20B are driven from the control circuit 201 via the external control circuit 203, the data recorded on the disc 206 is reproduced by the pickup 207. , the reproduced signal is sent to the RF signal detection circuit 20
Send on 8th. The RF signal detection circuit 208 separates the reproduced signal into a signal to be supplied to a servo circuit 209 and a signal to be supplied to a demodulation circuit 210.

Here, the servo circuit 209 causes the pickup 207 to perform focus serve and tracking serve, and also sends various signals to the pickup feed motor 205 to perform linear track serve and king serve.

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.
At the same time, 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 converted back to an analog signal by the D/A converter 212 is used to drive the speaker 216 with necessary processing such as error correction, dinterleap, and error correction. It will be done.

In FIG. 2, 214 is a ROM for driving the control circuit 201 according to a predetermined noogram, and txs 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 (CIJAR) key 134] This key is used to change the song number display 114h, which is currently displaying the above-mentioned numeric key data, to display the original song number (address).

Note that when the memory read (MREAD) key 132 and the clear (CLEAR) key 134 are operated at the same time, a memory all clear (ALL CLEAR) operating state is established.

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

[Repeat (RKPEAT)
Keys - 1 1 9] Each time this key is operated, repeat (repeated playback) is turned on and off.

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

[Gray (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 continued after the operation force of 2 to 131 is applied.

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

When used in combination with the memory read (MREAD) key 132 or the number (O to 9) keys 122 to 131, it will not enter the search operation state as Auto Mereimo P, and will enter the play state after the search is completed. being done.

It should be noted that an error (E
RROR) If the display 114C is blinking,
This key has the same operation as the CLEAR key 134.

[PAUSE key 120] This key may be used alone or may be operated following the operation of the memory read (MREAD) key 132 or number (0-9) keys 122-131.

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 (MREAD) 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 operates in the same way as the clear (CI, EAR) key 134.

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

Further, when this key is operated in the auto gray mode, a search operation is performed using 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 display TNO in manual gray mode, and the next memory in the display memory channel in auto gray mode. A search operation is performed using the channel contents as the target address. Note that this key operation does not cause a transition to the gray/pause state.

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

Note that if you operate this key during Auto Memory P, the forward operation will be performed while you are operating it, but if the position where you stopped the operation is outside the currently playing song, the search operation for the next memory channel will be performed. O (J (REV) key 115) When this key is operated, the /R1 quad operation is started.

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

[STOP (5TOP) key 121] When this key is operated, the mode shifts to manual mode, and after the first song search is performed, a pause state is entered. However, this does not apply when the pause state is in advance at the beginning of the first track.O [EJECT key 112] If this key is operated during playback, the playback state is canceled and the disc motor stops and the The disk loading section 111 is opened approximately one second after the dediode is turned off and the bi-quag returns to its starting position.

In addition, when operating each key mentioned above, a so-called CHIRP sound (approximately 3.5 kHz) is emitted as proof that the key operation has been accepted.
(output for 0.072 seconds) is generated.

[EJECT indicator 114a] After the EJECT key 112 is operated, B, C, and f flash at a cycle of about 3 Hz until they return to the starting position.
The light is turned on when the disk loading section 111 is opened, and the light is turned off when the disk loading section 111 is closed.

[Search (5EARCH) indicator 114b] Lights up when all the TOC (table off content) data in the lead-in area recorded as index data on the disk is read normally and the search for the first song is completed. It is done like this.

[Error (ERROR) indicator 114c] When an error (described later) occurs, the indicator blinks at a frequency of approximately IHz, lighting for approximately 0.67 seconds and extinguishing for approximately 0.33 seconds. The light goes out when about 10 seconds have elapsed since then or when the CLEAR key 134 is operated.

The error 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. If there is no memory read (MREAD) key 132 or next play (NEXT PLA) in auto play mode.
Y) When a search operation is commanded by operating the key 118, but the TNO of the specified memory channel contents does not exist on the disk. ■ Command index X (arbitrary address in a certain song) that performed the search operation exists. ■ If the search operation is not completed even after 20 seconds have passed after the start of the search operation ■ If you try to write TNO = 00 as memory channel data, etc. [REPEAT indicator 114d] ]It is designed to light up when the repeat function is on.

[MANUAL display 114j] MANUAL! It lights up when in Ray mode or eject mode P, and blinks while reading the lead-in area (approximately 3 Hz cycle).

[Autoplay (AUTO') indicator 114e] It is designed to light up during the automatic play mode.

[Memory CMEMORY] Display 114f] Number (()
~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 INDICAT
ORz14g: ] In this case, the portion corresponding to the memory channel that has 8 channels and is written in is lit in all states.

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

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

Furthermore, when the memory read (MREAD) key 133 is operated, the portion corresponding to the memory channel being read out blinks (at about the same frequency of 3 Hz).

[Music number (MUSICNO) 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. Tsumashi, 9642 digits on the left side are TNO and X.

They represent MIN (minutes) and 5EC (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 to 9) keys 122 to 131 or the memory read (M READ) key 133,
Only TNO and X are displayed, and MIN and SEC (elapsed time from beginning to end of the first song) are blanked.

During the search operation, TNO and X are flushed,
MIN, SE, and C are flanked.

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

[PAUSE indicator 114t] Lights up during pause mode.

Next, an embodiment of the present invention based on the following outline will be described. In the case of the auto gray mode, in the present invention, a repeat (REPE) is activated at the end of the last channel performance.
AT ) key on, play again from channel 1,
This configuration is such that when the REPFAT key is off, the program returns to the beginning of the first song, cancels the auto gray mode, and enters a pause state.

That is, as shown in FIG. 3, in which the same reference numerals are given to the same components as in FIG. Each person's power is connected to one end.

Further, the output terminal of the final channel performance end detection circuit 314 provided in the control circuit 201 is connected to an AND gate 315,
316 input terminals.

Here, the other end of the And Dirt 3121ri is the repeat switch 317 (corresponding to 119 in Figures 1 and 2).
and its output terminal is connected to the other input terminal of the AND gate 316.

The other input end of the AND gate 315 is connected to the repeat switch 317 via an inverter Ilk, and its output end is a flip-flop.

It is connected to the set input terminal S of the Z circuit 318.

The output terminal of the AND gate 313 whose other input terminal is connected to the set output terminal Q of the free lag flop circuit 318 is the first track start search circuit 3 provided in the control circuit 201.
It is connected to the input terminal of 19.

The output terminal of the first track start search end detection circuit 320 provided in the control circuit 201 is connected to the reset input terminal R of the flip-flop circuit 318 via the delay circuit 321, and It is connected to the control signal input terminal T1 and the manual play control signal input terminal T.

Further, the output terminal of the AND dart 316 is connected to the input terminal of a performance channel data control circuit 322 provided within the control circuit 201.

Although the switches and keys corresponding to the operation keys other than the repeat switch are not shown in FIG. 3 to simplify the explanation, it is assumed that they are actually provided in the same way as in FIG. 2.

Therefore, in the above configuration, the desired number of song numbers to be played back is preset in a predetermined channel, and the preset songs are played back in accordance with the order. Then, the control circuit 20
A HIGH signal is sent to one end of each input of the AND gates 312 and 313 from the auto gray mode detection circuit 311 provided in the
A level detection signal is being output.

If the repeat switch 317 is turned on in this state, an output signal at IIGH level is supplied from the amplifier 312 to one input end of the amplifier 316.

In this state, if the performance of the last channel section is completed due to the progress of the auto play mode, the final channel performance end detection circuit 314 in the control circuit 201 outputs a HIGf (level detection signal). It becomes like this.

This allows the &'r''-tosx6 to control circuit 20.
As a result of the performance channel data control signal being supplied to the performance channel data control circuit 322 in channel 1, a reperformance from channel 1 is started.

Next, if the repeat switch 317 is not turned on at the end of the performance of the last channel part in the auto gray mode, then
6 are both not established, but instead, the AND gate 315 is established, causing the flip-flop circuit 318 to close and close.

By this, from the AND gate 313, the production 1 circuit 20
As a result, a control signal for searching the beginning of the first song is supplied to the first song beginning search circuit 319 in the first song, and as a result, a search operation state for the first song beginning portion is entered.

As described above, the 1llll'flli1 circuit 201 controls the disc playback thread 202 via the external control circuit 203.
This is done by sending out a signal 'necessary for searching for the beginning of the first song'.

When the beginning of the first song is searched (this is achieved by detecting the address [01] corresponding to the beginning of the first song), the search for the beginning of the first song in the control circuit 201 ends. As a result of the detection circuit 319 outputting the search end detection signal at the beginning of the first song, the control circuit 20
By supplying control signals for pause and manual play to the pause control signal input terminal T1 and manual play control signal input terminal T2, respectively, the auto play mode is canceled and the first song is played in the manual gray mode. It will be in a pose state with its head.

This ringing and first music beginning search completion detection signal is also used to reset the frig-flow, zo circuit 316 via the delay circuit 32 for ensuring the above-mentioned pause state.

That is, as described above, when the last channel in auto play mode finishes playing, depending on whether or not the repeat switch is turned on, it will return to channel It/C and play again in auto gray mode, or it will return to the beginning of the first song and play automatically. By configuring the play mode to be canceled and enter a pause state, it is possible to select whether or not to continue replaying using the auto gray mode, and to return to the beginning of the FF 11th track and perform playback cleaning using the manual break mode. It can be said that it has the advantage of being a one-touch type and can be operated in a minimum amount of time, and that it has a highly advanced control function that can contribute to improving operability.

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 gist of the invention.

〔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 the drawing]

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 diagram of main parts showing an embodiment. 110...cab failure, 111...disk loading section, 112...innoext key, 213...noya wargi-1114...display section, 115...lino-sugi-1116... ...First forward key, 1 Noah...Play key, 118...Next play key,
119...Repeat key, 120...Pause key,
12no...Stop key, 122-131...Numeric keys, 132...Memory read key, 133...Memory key, 134...Clear, 114h...Eject indicator, 114b... -Reach indicator, 11
4c...Error table +le 躬H, 114d --
-Livi) 'Z% Temperature reading, IJ4e-
Auto play display, 114f...Memory display, 1
14g...Memory indicator, 114h...Track number display, 1141...Time display, JJ4j...Manual display, I241c...Play display, 11
41...Pause indicator, 201...Control 1 circuit, 2
02...Disc playback system, 203...External control circuit, 204...Disc motor, 205...Pickup feed motor, 206...7-Isk, 207...
...Pickup, 208...RF (@ number detection circuit,
209... Servo circuit, 210... Demodulation circuit, 21
)...address detector, 212...D, /A converter, 213...p, AM, 214...ROM, 21
5...Display output control circuit, 216...Speaker, 3
11... Auto-relay mode detection circuit, 312, 31
3...And r-), 314...Final channel performance end detection circuit, 315°316...And gate,
317...Repeat key, chi, 318...Furi, f
Florag circuit, 319... 1st song start search circuit, 32
0... First song start search end detection circuit, 321... Delay circuit, 322... Performance channel data control 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 desired number of address data among the plurality of address data is preset to a predetermined channel. a first means for automatically reproducing data to be reproduced corresponding to the preset contents in a predetermined channel order, and replaying from the first channel when the first means detects that the last channel in the reproduction state has finished playing. a second mode that enables a selection operation of whether to perform a pause state with the automatic playback mode canceled or to return to the first playback data of the plurality of playback data;
A disc record playback device comprising: means.