JPS5940367A - Disk record reproducer - Google Patents

Abstract

PURPOSE:To perform rationally and instantly in the minimum time the selection for continuation of a replay in an auto play mode and an operation to set a pause mode after coming back to the head of a channel (1), by outputting a play end signal in high level. CONSTITUTION:A desired number of music numbers to be replayed are preset to the prescribed channels and then reproduced in order of presetting in an automatic mode. Then the detecting signal of a high level is delivered to an input of AND gates 312 and 313 respectively from an automatic play mode detecting circuit 311. Under such conditions, if a repeat switch 317 is turned on, an output signal of a high level is supplied to an input of an AND gate 316 from the gate 312. Then a play proceeds in an automatic play mode and then through with the final channel part. Thus a detecting signal of a high level is delivered from a final channel play end detecting circuit 314 in the circuit 201.

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 T)AD (digital audio disc), and particularly relates to a control U- [Technical background of the invention and its problems] Recently, in the field of audio equipment, digital recording using PCM (pulse code modulation) technology has become popular in order to achieve as high fidelity reproduction as possible. Regeneration methods are being adopted.

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 has been established in principle.0 In this case, a system that uses a disk as a recording medium is called a DAD system, and its recording and reproducing methods include optical, electrostatic, and mechanical. Some methods have been proposed, but no matter which method is adopted, the playback device that embodies it must be fully satisfied with various advanced control functions and performance not found in conventional devices. It is required that it be earned.

In other words, if we take the CD system as an example, this means that a transparent resin disk with a diameter of 12 trtt and a thickness of 1.2 mm has hippits (irregularities with different reflectances) corresponding to the digital PCM data. The disk formed by coating the thin metal film is coated with an area of about 500 to 20 using the CLV (Constant Linear Velocity) method.
It is driven to rotate at variable rotational speeds of Or, p, and m, and is reproduced in a linear tracking style from the inner circumference side to the outer circumference side using an optical pickup with a built-in photoelectric conversion element made with a semiconductor laser. 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 an hour on one side is digitized and recorded in the program area (radius between 25 and 58) 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 degrees).

However, this type of disc record playback device, which has been known in the past, has not yet been realized with excellent operability and display performance to satisfy its advanced control functions. 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 sophisticated control functions with a simple configuration, thereby contributing to improved operability.

[Summary of the invention]

A disc record reproducing apparatus according to the present invention is a disc record reproducing apparatus for reproducing all disc records in which a plurality of data to be reproduced and their address data are both digitized. a first means for presetting a desired number of address data among the data into predetermined channels and automatically reproducing data to be reproduced corresponding to the preset contents in a predetermined channel order; The present invention is characterized by comprising a second means for enabling replay from the first channel when the end of the play on the last channel in the playback state is detected.

[Embodiments of the invention]

First, an overview of the CD-type DAD 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 and closing the disk loading section, and a power POWER key 113 for connecting and disconnecting the power source.

Further, on the upper right side of the disk loading section 111, there is a display section 114 for making various displays described later, a reverse REV key 115 for so-called backward operation, a fast forward FF key 116 for fast forward operation, and a play PLAY key 11 for operation
7 is provided. Similarly, in the middle row are the NEXT PLAY key 118, which will be described later, the REPEAT key 119, and the PAUS key.
An E key 120 and a stop 5 TOP key 121 are provided. Similarly, numeric keys 122 to 131 of 0.1, 2...9, a memory read MREAD key 132, a memory MEMORY key 133, and a CLEAR key 134 are provided in the lower row.

The above-mentioned display section 114 displays the eject button.
Display L
AL display 114j, auto play AUTO display 11
4e, MEMORY indicator 114f 8 channel memory indicator MEMORY INDI
CATOR114g and 2nd song number MUSIC No. display 11
A 4-hour work time TIME display 1141 is provided.In addition, a PLAY key 117 and a work pause PAUS are provided.
Each PLAY indicator 11 is also displayed during the E key 120.
4 and a PAUSE indicator 114t are provided. FIG. 82 shows the electric circuit system of the CD type DAD playback device shown in FIG.
- 134, the disc playback system 202f is controlled to a predetermined state via the control circuit 201 comprising a microcomputer, an interface circuit, etc. It is a display.

In other words, when the disc reproducing thread 202 is driven by the dice motor 204 and the pickup feed motor 205 from the control circuit 201 via the external control circuit 203, the data recorded on the disc 206 is reproduced by the pickup 207. , and sends the reproduced signal to the RIi" signal detection circuit 208. This RF signal detection circuit 20B sends the reproduced signal to the servo circuit 209 and the demodulation circuit 21.
0 and the signal supplied to 0.

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

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 synchronizing signal power; the separated reproduction signal is EFM demodulated and supplied to the D/A converter 212.

The address signal detected by the address detector 211 is taken into the -U RAM 213 via the control circuit 20.1, 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 subjected to necessary error correction, dinterleap,
The speaker 216 is connected to the speaker 216 with processing such as error correction.
It will be used to drive the sound.

In FIG. 2, 214 is a ROM for driving the control circuit 201 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.
2,115-134 The function of the work display section 114 will be explained. ) [Number (0 to 9) keys 122/-131] These keys are for inputting numbers, and are used when writing songs to the playback designation memory during a search.

[Memory key 133] Used when saving numerical key data to a memory channel.

[Clear (CLEA, R) 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).

In addition, the memory read MREAD key 132 and the clear CL
When the EAR key 134 is operated at the same time, the memory all clear ALL CL EAR operation state is established.

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

[Libby REPEAT key 119] Repeat (repeated playback) is turned on and off each time this key is operated.

However, when the power is turned on, the repeat and punch functions are off.

[PLAY PLAY key 11] This Imaichi is used both when used alone and when the memory read M
READ key 132 or number (0-9) keys 122~
There are cases where the operation is performed subsequent to the operation of 131.

First, when used alone, if the state immediately before operating this key as a manual play mode 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 manual play mode, and if the key is operated during a search operation, the play state will change after the search is completed. It's being done in a natural way.

When used in combination with the memory read MREAD key 132 or the numeric (0-9) keys 122-131, the autoplay mode is set to a search operation state, and after the search is completed, the play state is entered.

In addition, immediately before operating this key, an error ERR (described later) will occur.
If the OR display 114C is blinking, this key operates in the same way as the CLEAR key 134.

[PAUSE key 120] This key is also used when used alone and for memory read MRE.
AD key 132 and fc are number keys (0-9) keys 122-1
31.

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. Also, if the operation is performed during a search operation, it will enter a pause state after the search is completed.
are doing.

When the memory read MREAD keys 132 and 131 are used in conjunction with the number (0 to 9) keys 122 to 131, they enter the search operation state. If the error ERROR indicator 114C is blinking, this key has the same operation as the CLEAR key 134.0 [NEXT PLAY key 118] First, in manual play mode, press this key. When this key is operated, a search operation is performed with the next song (actually the next TNO: ) rack number as the target address.0 Also, when this key is operated in auto play 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 displayed TNO in manual play mode, and the next memory of the displayed memory channel in auto play mode. A search operation using the channel contents as the target address is performed. Note that this key operation does not cause a transition between the play/bose state.

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

In addition, if you operate this key in auto play mode,
A forward operation is performed during the operation, but if the position at which the operation is stopped deviates from the song being played, a search operation for the next memory channel is performed.

[Reverse REV key 115] When this key is operated, backward operation is started.

Note that if a packed word operation is performed in the auto play mode and the stop position deviates from the song being played, a search operation is performed for the preceding mesori channel.

[Stop 5 TOP key 121] When this key is operated, the player enters manual play mode and enters a pause state after serving the first song. Except when the head is in a pose-like mori.

[Eject key 112] If this key is operated during playback, the playback status will be canceled, the disc motor will stop, the loser diemade will be turned off, and the pink-up will return to the starting position. Approximately 1 second after returning to the starting position. The disk loading section 111 is later opened.0 When operating each of the keys mentioned above, a so-called CHIRP sound (approximately 3.5KHz) is emitted as proof that the key operation has been accepted.
(output for 0.072 seconds) is generated.

[Eject EJECT indicator 114a] Eject E
After the JECT key 112 is operated, the pink-up flashes at a frequency of approximately 3 Hz until it returns to the starting position, lights up when the disc loading section 111 is opened, and turns off when the disc loading section 111 is closed. [Ser y-8 EARCI-I display 114b] The search for the first song is completed when all TOC (table off content) data in the lead-in area recorded as index data on the disc are read normally. It is designed to turn on when the light is on.

[Error ERROR indicator 114C] A point occurs in about 0.67 seconds when an error occurs, which will be described later.

It is designed to blink at a frequency of about I Hz and disappear in about 0.33 seconds, but the frequency is about 10 seconds after the start of blinking.
The light goes out when seconds have elapsed or when the CLEAR key 134 is operated.

The following error occurs after approximately 20 seconds have passed since the disc was set upside down: ■ A search operation is commanded using the number (O to 9) keys 122 to 131, but the specified TNO does not exist on the disc. If not ■ Memory read MREAD key 132 or in auto play mode NEXT, DOBRAY NEXT PT, A
Operate the Y key 18 to command a search operation. Next, if the TNO of the specified memory channel contents does not exist on the disk ■ Perform a search operation and specify 7 Index X (any address in a certain song) ) does not exist and fc
Cases (1) When the search operation is not completed even after 20 seconds have passed after the start of the search operation (2) When an attempt is made to write TNO=00 as memory channel data.

[Libby] REPEAT indicator 114d It is designed to light up when the repeat function is on.

[Manual M A N U A L display 114 j
) In the manual play mode f fr,, lights up in the eject mode and flashes while reading the lead-in area (about 3 hours, cycle). It is designed to light up when in play mode.

[MEMORY display 114f] Numbers (0 to 9)
When 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 keys other than numeric keys are operated.

[Memory (y;) MEMORY INDICA
TOR114g] In this case, it has 8 channels, and in all states, the portions corresponding to the memory channels that are filled in are lit up in L sections.

Furthermore, in the auto play mode, the portion corresponding to the memory channel being repopulated flashes (at a frequency of about 3 Hz).

Then, operate the number (θ to 9) keys 122 to 131 to f
cJ! When the memory is in a writable state, the part corresponding to the memory channel of the lowest honor code to be written and obtained blinks (about 3 Hz cycle).

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

[Song number MUSIC No. display 114h Working time TIM
E display 1141] These consist of a total of 8 digit numeric displays, which collectively serve as the address (data) display section. In other words, 2 digits each on the left side indicate TNO, X, MIN (minutes), They represent SE and C (seconds), and in the eject mode, all lights are turned off, and in the playback state, the address being played is displayed.

t, number (0-9) keys 122-131 or memo l
/Read When the MREAD key 133 is operated, TNO
, Xl7) are displayed, and MIN and 5EC (time elapsed from the beginning of the first song) are blanked.

During the search operation, TNO and X lash by 7,
MIN, SEC are blanked. 〇 [Play PLA Y display 114k] QC data: Pp, usE display 774t'J button is designed to light up during play mode. Next, an embodiment of the present invention based on the above-mentioned summary will be explained. In the auto play mode, the repeat REPEA light is turned on when the last channel is finished playing.
When the T key is on, the playback starts from channel 1, and when the REPEAT key is off, the playback returns to the beginning of channel 1 and becomes 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. is connected to one end of each input.

However, the output terminal of the final channel performance end detection circuit 314 provided in the control circuit 201 is an AND gate 315.
, 316.

Here, the AND gate 312 has its other end connected to the repeat switch 317 (corresponding to 119 in FIGS. 1 and 2), and its output end connected to the other input end of the AND gate 316. The other end of the AND gate 315 is connected to the repeat switch F317 via an inverter, and its output end is connected to the cent input terminal SK of the flip-flop circuit 318. The other input terminal is connected to the output terminal Q, and the output terminal of the AND gate 313 is connected to the input terminal of the one-channel search circuit 319 provided in the control circuit 201. The pressure end of the 7°C channel one head search end detection circuit v5.320 provided in It is connected to the input terminal T.

The output terminal of the i fc% AND gate 316 is connected to the control circuit 20
1. Performance channel data control circuit 322
is connected to the input end of the

In addition, in order to simplify the explanation, in FIG. 3, switches corresponding to each operation key other than the repeat switch are not shown, and it is assumed that the switches are actually provided in the same way as those shown in FIG. 2. do.

Therefore, in the above configuration, assume that the system is currently in the automatic play mode in which a desired number of song numbers to be played are preset in a predetermined channel and the preset songs are played in accordance with the order. , control circuit 20
A HIGH signal is sent to one end of each input of AND gates 312 and 313 from an auto play mode detection circuit 31) provided in
A level detection signal is being output.

If the repeat switch 317 is turned on in this state, a HIGH level output signal is supplied from the AND gate 312 to one input end of the AND gate 316. In this state, the performance in the auto play mode is in progress. Assuming that the performance of the last channel section is completed, the final channel performance end detection circuit 314 in the control circuit 201 outputs a detection signal of I (IGH level). As a result of the performance channel data control signal being supplied to the performance channel data control circuit 322 in 201, replay from channel 1 is started.Next, when the performance of the last channel section in the auto play mode ends If the repeat switch 317 is not turned on, both the AND gates 312 and 316 will be in a failed state, but instead, the AND gate 315 force i will be established and the flip-flop circuit 318 will be set. From the AND gate 313 to the control circuit 201
As a result, a control signal for searching one channel is supplied to the one-channel search circuit 319 in the channel 1, resulting in a search operation state for one channel. channel 1 to the disc play thread 202 through
This is done by sending out the signals necessary for the head search.

Then, when 10 channels have been searched (this is achieved by detecting the target address corresponding to the head of channel 1), a channel 1 search end detection circuit 319 in the control circuit 201 As a result, the pause control signal input terminal T of the control circuit 201 outputs a channel end detection signal.

In this case, the end detection signal for channel 1 will be in the Bose state "FC Serial". 0 is also used to reset the flip-flop circuit 316 via the delay circuit 321 for Channel 1 indicates whether or not there is an on operation.
Either the channel 1 returns to the auto play mode and is played again, or it returns to the beginning of channel 1 and enters a pause state without using the auto play mode. [This configuration allows the selection of whether or not to continue replaying using the auto play mode, as well as the operation of returning to the beginning of channel 1 and entering the pause state, to be done in a rational, one-touch manner, and in the minimum amount of time. It can be said that it has the utility of being able to perform various operations, and that it has a highly advanced control function that can contribute to improving operability.0 Note that this invention is limited only to the embodiments illustrated above. It goes without saying 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, especially in a disc record playback device that regenerates a disc on which digitized data is recorded, it is possible to provide a technology that can reliably provide advanced control functions with a simple configuration. This makes it possible to provide an extremely good disk record reproducing device with an improved mechanism 7 that can contribute to improved operability.

[Brief explanation of the drawing]

1 and 2 are a front view of 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;
The figure is a block diagram of main parts showing an embodiment of the present invention.0110...cabinet, 111...disk loading section, 112...eject key, 113...
・Hower key, 114... Display section, 115°°' Reverse key, 116... Fast forward key, 1
11°...Play key, -7111...Next play key, 119...Repeat key, 120...Bose key, 121...Stop key, 122-131
...Numeric key, 132...Memory read key, 13
3...Memory key, 134...Clear, 114a
... Eject indicator, 114b... Search indicator, 114C... Error indicator, 114d... Repeat indicator, 114e... Auto play indicator, 114
1...Memory display, 114g...Memory indicator, 114h...Track number display, 1141...Time display, 114j...Manual display, 114k.
...Play display, 114t...Pause display, 20
ノ...Control circuit, 202...Disc playback system, 20
3... External control circuit, 204... Disc motor,
205...° Pickup feed motor, 206... Disc, 207... Pickup, 208... RF
Signal detection circuit, 209... Servo circuit, 210...
Demodulation circuit, 211...Address detector, 212...
D/A converter, 213...RkM, 214...RO
M, 215...Display output control circuit, 216...Speaker, 311...Auto play side detection screen, 31
2,315°316.313...and gate, 31
4...Final channel performance end detection circuit, 317...
・Repeat switch, 318...Clip float circuit, 319...1 channel total circuit, 32o・
...One channel 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 are transmitted to a predetermined channel. a first means for automatically reproducing data to be reproduced corresponding to the preset contents in a predetermined order of channels; and a second means for enabling a selection operation of whether to play again or return to the first channel and enter a pause state.
Main device□