JPS5940371A - Disk record reproducer - Google Patents

Abstract

PURPOSE:To ensure assuredly the highly accurate control and display with a simple constitution, by storing automatically the read table-of-contents data, reading these data successively with a prescribed switch operation and then displaying these read-out data at a display device. CONSTITUTION:When the reading is started fro the TOC data which are stored in a read-in area of a disk, the TOC data is supplied to a written data input part ID of an RAM 11. The RAM 11 stores the read-out TOC data successively by a counter 13 with designation of addresses. When the data of a program area of the disk is read, the data (data on TNO, reproduction time, etc.) is displayed at a display device 15 from an output part OA of a control circuit 201 via a data selector 12. Then the count value of the counter 13 is increased with each operation of a switch 140, and the TOC data stored in the RAM 11 are displayed successively at the device 15.

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 to a display system thereof.

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, a digital recording and reproducing method using PICM (/f code modulation) technology is being adopted in order to achieve high fidelity reproduction as much as possible.

This is called digital audio, and it means that the audio characteristics are independent of the characteristics of the recording medium and are far superior to 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 optical, electrostatic, and mechanical recording and reproducing methods have been proposed. Even when adopting this method, the playback device that embodies it is required to be able to satisfy various advanced control functions and performance that are not found in conventional P systems. .

In other words, if we take the CD system as an example,
A transparent resin disk with a diameter of 2 crn and a thickness of 1.2 crn is coated with a metal thin film that forms bits (irregularities with different reflectances) corresponding to digital (PCM) data, and the resulting disk is CLV (linear velocity). p about 500 to 20 O depending on the method (fixed)
It is driven to rotate at variable rotational speeds of r, p, and m, and is reproduced in the lJ near track king style from the inner circumference side to the outer circumference side using an optical pickup containing a semiconductor laser and a photoelectric conversion element. , 7" (Suffix) has a track pitch of 1.6 μm, and a huge amount of information is recorded in the program area (radius 25 to 58 mm), which can be played in stereo for about 1 hour even on one side. This can be easily seen from the fact that the first song number, the last song number, etc. are recorded in the lead-in area (radius 23 to 25 mm).

However, in the case of conventionally known disc record playback devices of this type, one that has excellent operability and rich display performance to satisfy its advanced control functions has not been realized, so there is an urgent need to solve this problem. This was considered to be an issue that should be addressed.

[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 and display functions with a simple configuration, thereby contributing to improved display performance.

[Summary of the invention]

This invention provides a system for automatically storing read table-off content data in a disc record playback device that plays a disc in which table-off content data is recorded in the lead-in area and digitized data is recorded in the program area. means for sequentially reading out the table off content data stored in the first means by performing a predetermined switch operation; and a third means for displaying the evening on the display.

[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 cabit 11o so as to be freely openable and closable. and,
On the left side of the disk loading section 111, an eject key 112 for opening/closing the disk loading section and a POWER key 113 for connecting/disconnecting the power source are provided.

Further, 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 (REV) key 115 for so-called pack word operation, and a fast forward (F) key 115 for fast forward operation.
F) Key 116 and play (PLA) for play operation.
Y) key 117 is provided. Similarly, in the middle row is the NEXT PLAY key 11, which will be described later.
8 and repeat (REPEAT) key 119, pause (PAUSE) key 120 and stop (STOP)
) keys 12 are provided. Similarly, 0 at the bottom
, 1, 2...9 numeric keys 122 to 131, memory read (MREAD) key 32 and memory (MEM)
ORY) key 133 and a clear (CLEAR) key 134 are provided.

Then, the above-mentioned display section 114 displays the eject (EJEC)
T) Display 114a, search (SEARC) I) display 14b, error (ERROR) display 1 4c.

Repeat (REPEAT) display 114d, manual (MANUAL) display 114j, automatic relay (AU)
TO) display 114e, MEMORY display 114f and 8-channel memory indicator (M
EMORY INDICATOR) 114g, track number (MIJSIC) indicator 114h and time (TI
ME) display 1141 is provided.

In addition, the play (PLAY) key 117 and the pause (P
PLAY (AUSE) key 120
) The display 114 and a PAUSE display 1141 are provided.

FIG. 2 shows the electric circuit system of the CD type DAD playback device shown in FIG.
134, the disc playback system 202 is controlled to a predetermined state via the control circuit 201 comprising a microcomputer, an interface circuit, etc. It is a display that makes a good display.

That is, when the disc motor 204 and the pick-up motor 205 are driven from the control circuit 20 via the external control circuit 203, the disc reproduction system 202 reproduces the data recorded on the disc 206 by the pickup 207, and the data recorded on the disc 206 is reproduced. RF signal detection circuit 20
Send on 8th. This RF signal detection circuit 20B separates the reproduced signal into a signal to be supplied to the servo circuit 209 and a signal to be supplied to the demodulation circuit 210.

Here, the sensor circuit 209 causes the pickup 207 to perform focus servo and tracking servo, and also sends out 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 reproduced signal from which the synchronizing signal has been separated is demodulated (EFM) and supplied to the D/A converter 212.

The address signal detected by the address detector 2 is then taken into the RAM 213 via the control circuit 20 and is used to perform necessary control functions.

Furthermore, the reproduced data that has been converted back to an analog signal by the converter 212 is subjected to necessary error correction, dinning leave, error correction, and other processing before being used to drive the speaker 216 to produce sound. Become.

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 to 134 and the functions of the display section 1140 will be explained.

[Number (0-9) keys 122-13] These keys are for inputting numbers, and are used when specifying a song to be played at the time of searching (finding the beginning) and when loading into memory.

[Memory (MORY) key 133] Numerical key Used when writing 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 (?vIRED) key 132 and the clear (CLEAR) key 134 are operated at the same time, a memory all clear (ALL CLEAR) operating state is entered.

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

[REPEAT key IJ9] 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 IJ7] This key is used both when used alone and for memory read (M
READ) key 132 or number 0-9 keys 122-1
There are cases where the operation is performed continuously after the third operation Ω.

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

When used in combination with the memory read (MREAD) key 32 or the number 0/9 keys 122 to 131, the key is set to auto gray mode, search operation state, and after the search is completed, the play state is entered. .

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] This key is also used when used alone and for memory read (MR).
EAD) key 132 or number 0-9 keys 122-13
There are cases where the operation is performed subsequent to operation 1.

First, when used alone, if the state immediately before operating this key is a gray state, the play state is canceled and the pause state is entered. Further, 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 numbers 0-9, 122-13, the 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 key 134.

[NEXT GRAY (NEXT PLAY key 1] 8) First, when this key is operated in manual play mode, a search operation will be performed with the next song (actually the next TNO Nidorak number) as the target address. is being done.

1. When this key is operated in 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 displayed TNO in manual play mode, and the memory channel next to the displayed memory channel if in auto gray mode. ``A search operation is performed using the target address as the target address.

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

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

In addition, if you operate this key in auto gray 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 when a packed word 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 (5 TOP) key 12] When this key is operated, a transition is made to the manual gray mode, and after the first music search is performed, a pause state is entered.

[Eject key 1-2] Operating this key during playback will cancel the playback state, and approximately 1 minute after the disc motor stops, the laser diode turns off, and the BigAg returns to the starting position. The disk loading section III is configured to open after a second.

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, it flashes at a frequency of approximately 3 Hz until the pickup returns to the starting position. When the disc loading section 11 opens, it lights up to indicate that the disc is loaded. The light is turned off when the section 11 is closed.

[Search (5EARCI() Display 1-4b)] When all the TOC (table-on-content) data in the lead-in area recorded as index data on the disk has been read normally, the search for the first song has been completed. It is designed to light up.

[Error (ERnon) indicator 114C] When an error (described later) occurs, it blinks at a cycle of about 1 Hz, lighting for about 0.67 seconds and turning off for about 0.33 seconds, but when the blinking starts The light goes out when about 10 seconds have elapsed since then or when the CLEAR key 134 is operated.

And, the error occurrence status is ■ When approximately 20 seconds have passed since the disc was set upside down ■ When a search operation was commanded using the numeric keys 122 to 131 of 0 to 9, but the specified TNO does not exist on the disc ■ Memory read (MREAD) key 132t or next play (NEXTP LA) in auto play mode
Y) When a search operation is commanded by operating the key 11B, but the TNO of the specified memory channel contents does not exist on the disk ■ The specified X (an arbitrary address in a certain song) for which the search operation was performed does not exist. ■ If the search operation is not completed even after seconds have passed after the start of the search ■ If you try to write TNO = 00 as memory channel data ■ If all the TOC data recorded on the disk can be read normally This may be the case if it is not possible.

[REPEAT indicator 114d] This indicator lights up when the repeat function is on.

[MANUAL display 1-4j] This indicator lights up in manual play mode or eject mode, and blinks (approximately 3 Hz cycle) while reading the lead-in area.

[Auto play (AUTO) indicator 114e''J is designed to light up during auto play mode.

[Memory (MgMORY) display ll4f] Numbers 0~
When the 9 keys 122 to 131 are operated, the light is turned on when memory writing is possible, and then turned off after about 10 seconds or when a key other than the numeric keys is operated.

[Memory indicator (MFJMORY INDIC)
ATOR114g ] In this case, the portion corresponding to the memory channel that has eight channels and is written in is lit in all states.

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

Then, when you operate the number O~9 keys 122~No31, the part corresponding to the memory channel with the lowest number that can be written will blink (approximately 3 Hz) when the memory is writable.
period).

Further, when -133 is operated during memory read (M READ), the portion corresponding to the memory channel being read flashes (at approximately 3 Hz cycle).

[Music number (MUS ICA) display 114b and time (TZA) display 1141] These are composed of a total of 8 digit numerical displays, and are collectively referred to as an address (data) display section. 42 digits each from the left side are TNO and X.

They represent MIN (minutes) and 5EC (seconds), and in isoext mode, all lights are turned off, and in playback mode, the address being played is displayed.

Also, if you operate the number 0-9 keys 122-13 or the memory read (M READ) key 133, the TN
Only O and X are displayed, and MIN, SEC (elapsed time from beginning to end of the first song) and V are ranked.

During the search operation, TNO and X are flushing L.
, MIC, 10 are blanked.

[PLAY indicator 114k] Lights up when in play mode.

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

The TOC data mentioned above is recorded for the first track number (that is, TNO) and the last track number recorded on the disc, and for the time from when reading of the lead-in area is completed until the start of the lead-out. It consists of the time taken until each side is played back.

Next, an embodiment of the present invention will be described. In contrast to the apparatus constructed based on the outline as described above, the disc record playback apparatus according to the present invention is capable of reproducing TOC data read from the disc write-in area by operating a switch. is characterized in that it can be displayed on a display.

Such a function can be realized, for example, by a configuration as shown in FIG.

However, in FIG. 3, the same parts as in FIG. 2 are given the same reference numerals, and their explanations will be omitted.

That is, the TOC data output section 0Toc of the control circuit 20, which outputs 'roc data detected in the read state of the lead-in area of the disc, is a RAMIJO write data input section. It is connected to the.

In the RAM 17, a read data output section OD is connected to one input section of a data selector 12 described later, an address input section is connected to an output section of the counter 13, and a read convolution input terminal (R/w) is connected to the output terminal of the readout control circuit 14 constituting the control circuit.

The other input section of the data selector 12 is connected to the output section OA of the control circuit 201 which outputs the address r of the data recorded in the program area of the disc, and the output section outputs the track number (MUSICA). Display 114
h and a time (TIME) indicator 1141. Still, this data selector 12 has a control input connected to an output terminal Q of a set-reset type flip-flop 16, which will be described later.

The reset upper terminal CL of the counter 13 and the reset terminal R of the flip-flop 16 constitute the control circuit 20 and are connected to the output terminal of a TOC completion detection circuit NOR which reads TOC data and detects the completion state of convolution. has been done. The set terminal S of the above flip-frog I6 is TO
It is connected to the power source CC through a switch 140 that serves as a C readout key, and by operating this switch 140, the output terminal Q is set to the output terminal, and the reset terminal R is set to the TOC.
When it is set to high level by the end detection circuit 17, the output terminal Q is set to low level.

The midpoint of the connection between the switch 140 and the set input terminal S of the flip/no-flash 16 is connected to one input end of the OR circuit 18 . The other input terminal of this OR circuit 18 is connected to the output terminal of a clock generation circuit 19, which will be described later.
Its output terminal is connected to a clock input terminal Ck of a counter 13 that specifies a storage address of the RAM 11. The clock generation circuit 19 includes the control circuit 201
A clock signal synchronized with the output cycle of the data unit of the TOC data is output in the reading state of the lead-in area.

That is, in the disc record playback device having the above configuration, when reading of TOC data recorded in the lead-in area of the disc is started, the RAM is
11 writing data input department. supplied to At the same time, a clock signal output from the clock generation circuit 19 is supplied to the clock input terminal Ck of the counter 13 via the OR circuit 18. This allows RAM
The read TOC data is addressed by the counter 13 and sequentially stored in I1. In this case, it goes without saying that the read/write control circuit 14 operates to put the RAM 11 in the write state.

Next, when the data in the program area of the disk is read, the output section OA of the control circuit 201 is shown on the display 15.
Data (for example, data such as TNO and playback time) supplied from the data selector 12 is displayed. In this case, the counter 3 and the flip-flop 16 are each reset by the TOC end detection circuit 17 when writing of the TOC data is completed. Further, the RAM 71 is placed in a read state by the read/write control circuit 14.

In this state, when the switch 140 is operated, the output terminal Q of the flip-flop f16 is set to high level, and the data selector terminal 2 is turned on so that the read data of the RAI 1 is provided to the input section of the display 15. drive At the same time, a pulse is applied to the clock input terminal Ck of the counter 3, and its output data value is counted up. As a result, the display 15 displays the first TOC data (
In this case, the song number (TNO) and the playback start time of that song are displayed. Thereafter, each time the switch 140 is operated, the count value of the counter 13 is counted up, and the TOC data stored in the RAM 11 is sequentially displayed on the display 15.
This is what is displayed.

When the reading of the series of TOO' data stored in the RAM 11 is completed, the TOC end detection circuit 17 resets the counter 13 and the flip roller f16 again. Accordingly, the display 15 shows
The data supplied from the output section OA of the control circuit 201 via the data selector 12 is displayed again.

In this way, by operating the miswitch 140, TOC7J
- Being able to display the evening time makes it very easy to know the time required to play each side, for example, when dubbing each side recorded on a disc to a CD recorder.
It can be said that it has extremely good display properties.

It goes without saying that this invention should not be limited to the above-mentioned embodiments only, and that various modifications and applications can be made without departing from the gist of the invention.

〔Effect of the invention〕

As detailed above, according to the present invention, it is possible to reliably perform advanced control and display functions with a simple configuration, especially in a disk record playback device that plays back a disk on which digitized data is recorded. It is possible to provide an extremely good disc record playback device that has been improved and can thereby contribute to improved display performance.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the front appearance of a disc record playback device to which the present invention is applied, FIG. 2 is a block diagram used to explain the outline of the electronic configuration of the device in FIG. 1, and FIG. FIG. 2 is a block diagram showing a cover section of the disc record playback device according to the present invention. 110... Cabinet, 111... Disk loading section, l12... Eject key, 113... Power key, 114... Display section, 115... Reverse key, 116... Fast forward key, 117...
・Play key, 118...Next play key, 11
9...Repeat key, 12θ...Pause key, 12
ノ...stop key, 122-131...numeric key, 132...memory read key, 133...memory key, 134...clear key, 1-4a...eject display key, j14b...・Search display, container, 114
c...Error indicator, 114d...Repeat indicator, 114j...Manual indicator, 114e...Auto play indicator, 1/4f...Memory indicator, 114
g... Memory indicator, 114h... Song number display, 1141... Time indicator, 114k... Play indicator, 1141... Pause indicator, 20... Control circuit, 202... ...Disc regeneration thread, 203...External control circuit, 204...Disc motor, 205...
・Pickup feed motor, 206...disc, 2
07... Gockup, 208... RF signal detection circuit, 209... Servo circuit, 210... Demodulation circuit,
21 no...address detector, 2 no 2...1 converter,
213...RAM, 276...Speaker, 214
...ROM, 275...Display output control circuit.

Claims (1)

[Claims] A first means for automatically storing read table-off content data in a disc record playback device for playing a disc in which table-off content data is recorded in the lead-in area and 7" digitized data is recorded in the program area. a second means for sequentially reading out the table-off content data stored in the first means by performing a predetermined switch operation; and displaying the table-off content data read by the second means on a display. 1. A disc record playback device comprising: third means for displaying.