JPH0328760B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to, for example, a CD (optical compact disc) type DAD (digital audio disc).
Relating to a disc record playback device suitable for
Especially regarding its control system.

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, digital recording and playback methods that utilize PCM (pulse code modulation) technology are being adopted in order to achieve high-fidelity playback as much as possible.

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 is established in principle.

In this case, a system that uses a disk as a recording medium is called a DAD system.
Optical, electrostatic, and mechanical methods have been proposed as recording and reproducing methods, but no matter which method is adopted, the reproducing device that embodies it is still a conventional method. There is a need for devices that can satisfy various advanced control functions and performances that are not found in other devices.

In other words, taking the CD system as an example, this is a transparent resin disk with a diameter of 12 cm and a thickness of 1.2 mm, and a thin metal film that forms pits (irregularities with different reflectances) corresponding to digital (PCM) data. The disk coated with The disk is played using a linear tracking method toward the outer periphery, but the track pitch of the disk is
With a size of 1.6 μm, a huge amount of information that can provide approximately 1 hour of stereo playback on one side is digitized and recorded in the program area (radius 25 to 58 mm) along with address data, as well as the maximum and minimum song numbers. Data, etc. are in the lead-in area (radius 23 to 25
This can easily be seen from the fact that it has been digitized and recorded in MM).

However, conventionally known disk record playback devices of this type have not yet been developed with excellent operability and display performance to satisfy the advanced control functions.
This was considered to be an issue that needed to be resolved urgently.

[Purpose of the invention]

Therefore, this invention was made in view of the above points, and is intended to reliably provide advanced control functions with a simple configuration, especially in a disk record playback device that plays back a disk containing digitized data. It is an object of the present invention to provide an extremely good disc record reproducing device which has been improved to improve operability and contribute to improved operability.

[Summary of the invention]

That is, the disc record playback device according to the present invention plays back a disc record in which a plurality of data to be reproduced and their address data are both digitized and recorded, and the desired address of the plurality of data to be reproduced is A first means for specifying the operation, and a second means for obtaining the pose state at the time of operation.
and a third means for searching for a designated address in a combined operation state of the designation operation of the desired address data by the first means and the pause operation by the second means and putting it into a pause state. It is characterized by becoming.

[Embodiments of the invention]

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

That is, FIG. 1 shows a front external view.
In the figure, reference numeral 111 denotes a Kangaru pocket type disk loading section provided on the front surface of the cabinet 110 so as to be openable and closable. And this disk loading section 11
An EJECT key 112 for opening/closing the disk loading section and a POWER key 113 for connecting/disconnecting the power supply are provided on the left side of the disk drive unit 1 .

Further, on the upper right side of the disk loading section 111, there is a display section 114 for displaying various kinds of displays to be described later.
Reverse (REV) for so-called backward operation
A key 115, a first forward (FF) key 116 for first forward operation, and a PLAY key 117 for play operation are provided. Similarly, in the middle row there are a NEXT PLAY key 118 and a REPEAT key 119, which will be described later, as well as a PAUSE key 120 and a STOP key.
A key 121 is provided. Similarly, the lower row has number keys 122 to 131 of 0, 1, 2...9,
A memory read (M READ) key 132, a memory (MEMORY) key 133, and a clear (CLEAR) key 134 are provided.

The above-mentioned display section 114 includes an EJECT display 114a and a SEARCH display 114a.
Display 114b, error (ERROR) display 11
4c, repeat (REPEAT) indicator 114d,
MANUAL indicator 114j, AUTO indicator 114e, MEMORY indicator 114f, and 8-channel memory indicator (MEMORY)
INDICATOR) 114g and song number (MUSIC
NO) display 114h and a time (TIME) display 114i are provided.

Note that a PLAY indicator 114k and a PAUSE indicator 114l are also provided in the PLAY key 117 and the PAUSE key 120, respectively.

Figure 2 shows the electrical circuit system of the CD-type DAD playback device shown in Figure 1.
12, 115 to 134, the disc playback system 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, the disc playback system 202 is controlled by the control circuit 2.
01 to a disk motor 204 and a pick-up feed motor 205 via an external control circuit 203.
When driven, the data recorded on the disk 206 is reproduced by the pickup 207 and the reproduced signal is sent to the RF signal detection circuit 208.
This RF signal detection circuit 203 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 is connected to the pickup 20.
7 to perform focus servo and tracking servo, and also sends various signals to the pick-up feed motor 205 to perform linear tracking servo.

Further, the demodulation circuit 210 separates a synchronization signal for address detection from the reproduced signal, supplies the synchronization signal to the address detector 211, demodulates (EFM) the reproduced signal from which the synchronization signal has been separated, and demodulates the reproduced signal from which the synchronization signal has been separated.
It is supplied to the A converter 212.

Then, the address signal detected by the address detector 211 is sent to the RAM 21 via the control circuit 201.
3 and used to perform necessary control functions.

In addition, the reproduced data returned to an analog signal by the D/A converter 212 is subjected to necessary error correction, deinterleaving, error correction, and other processing before being used to drive the speaker 216 to produce sound. It turns out.

In addition, in FIG. 2, 214 is the control circuit 201.
215 is a ROM for driving the display unit 114 according to a predetermined program, and 215 is a display output control circuit for driving the display unit 114 in a predetermined state.

Next, each of the keys 112, 115 to 134 and the display section 114 in FIG. 1 and FIG.
Explain the functions of.

[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] Used when writing numerical key data to the memory channel.

[CLEAR key 134] Track number display 1 displaying the above numerical key data
14h is used to display the original song number (address).

In addition, memory read (M READ) key 13
2 and the CLEAR key 134 are operated at the same time, memory all clear (ALL
CLEAR).

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

[REPEAT key 119] 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 can be used alone or as a memory read (M READ) key 132 or a number (0
~9) There are cases where the keys are operated subsequent to the operations of the keys 122 to 131.

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 the play state is entered.
However, if the state immediately before operating the key was in the play state in auto play mode (described later), the mode shifts to manual play mode, and if the key is operated during a search operation, the play state after the search is completed. It is made so that.

And memory read (M READ) key 1
32 or number (0 to 9) keys 122 to 131 in combination, it enters a search operation state as an auto play mode, and enters a play state after the search is completed.

Note that if the error (ERROR) indicator 114c, which will be described later, is blinking immediately before operating this key, this key will be replaced with the CLEAR key 1.
It is designed to perform the same operation as 34.

[PAUSE key 120] When this key is used alone, it is also used as a memory read (M READ) key 132 or numbers (0 to
9) The keys may be operated subsequent to the operations of keys 122 to 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.

And memory read (M READ) key 1
32 or number (0 to 9) keys 122 to 131, a search operation state is entered.

Note that if the error (ERROR) indicator 114c is blinking immediately before operating this key, this key is the clear (CLEAR) key 13.
It is designed to perform the same operation as 4.

[NEXT PLAY key 11
8] First, when this key is operated in manual play mode, the next song (actually the next TNO:
A search operation is performed using the track number as the target address.

Further, when this key is operated in the 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 in the display memory channel if in auto play mode. A search operation is performed using the channel contents as a target address.

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

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

If you operate this key in auto play mode, a 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. This is what they are supposed to do.

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

If a backward 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 previous memory channel.

[STOP key 121] When this key is operated, the mode shifts to manual play mode, and after searching for the first song, the system enters a pause state. However, this excludes the case where the player is already in a pause state at the beginning of the first song.

[EJECT key 112] If this key is operated during playback, the playback state will be canceled, and approximately 1 second after the disk motor stops, the laser diode turns off, and the pick-up returns to the starting position. The disk loading section 111 is designed to open.

When operating each key mentioned above, a so-called CHIRP sound (approx.
(output for 0.072 seconds at 3.5kHz) is generated.

[EJECT display 114a] After the EJECT key 112 is operated, approximately 3Hz remains until the pickup returns to the starting position.
It blinks at a cycle of , lights up when the disc loading section 111 is opened, and turns off when the disc loading section 111 closes.

[Search (SEARCH) display 114b] When all the TOC (Table of Contents) data in the lead-in area recorded as index data on the disk has been read normally,
The light is turned on when the search for the first song is completed.

[Error (ERROR) display 114c] Lights up for about 0.67 seconds when an error described later occurs, and lights up for about 0.67 seconds.
It is designed to blink at a frequency of approximately 1 Hz and disappear in 0.33 seconds, but when approximately 10 seconds have elapsed from the start of blinking, or when the CLEAR key 134 is pressed.
The light turns off when operating.

And what is the error condition? When approximately 20 seconds have passed since the disk was set upside down. When a search operation is commanded using the number (0 to 9) keys 122 to 131, but the specified TNO does not exist on the disk. Memory If a search operation is commanded by operating the read (M READ) key 132 or the next play (NEXT PLAY) key 118 in auto play mode, but the TNO with the specified memory channel contents does not exist on the disk, the search operation is executed. Specified index X
(an arbitrary address in a certain song) does not exist. When the search operation is not completed even after 20 seconds have passed after the search operation started. When an attempt is made to write TNO=00 as memory channel data, etc. .

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

[MANUAL indicator 114j] 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] Lights up when in auto play mode.

[MEMORY display 114f] When operating the numeric keys 122 to 131 (0 to 9), the light will turn on when memory can be written, and then turn off after about 10 seconds or when a key other than the numeric keys is operated. being done.

[Memory indicator (MEMORY)
INDICATOR) 114g] In this case, there are 8 channels, and in all states, the portion corresponding to the written memory channel is lit.

Further, in the auto play mode, the portion corresponding to the memory channel for playback blinks (at a cycle of about 3 Hz).

When the numeric keys 122 to 131 (0 to 9) are operated, the part corresponding to the memory channel with the lowest number that can be written blinks (at a cycle of about 3 Hz) in a state where the memory can be written.

Furthermore, memory read (M READ) key 1
33, the part corresponding to the memory channel being read out blinks (at a cycle of about 3 Hz).

[MUSIC NO] display 114h and time (TIME) display 114i] These are 8-digit numerical displays in total, and are collectively referred to as an address (data) display.In other words, each one is displayed from the left side. Each two digits are TNO, X,
They represent MIN (minutes) and SEC (seconds), and when in eject mode, all lights are off, and when in 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, X will be displayed and MIN, SEC will be displayed.
(the elapsed time from the beginning of the first song) is blanked.

During the search operation, TNO and X are flashing, and MIN and SEC are blanking.

[PLAY indicator 114k] Lights up during play mode.

[PAUSE indicator 114l] Lights up when in pause mode.

Next, an embodiment of the present invention based on the above outline will be described.The present invention is characterized in that it is configured to perform a search for the beginning of a desired song and enter a pause state immediately after the search is completed. have.

That is, as shown in FIG. 3, in which the same reference numerals are attached to the parts configured similarly to those in FIG. 2,
(0 to 9) number switches 311 to 320 (first
(equivalent to 122 to 131 in Figs. 1 and 2) and pause switch 321 (equivalent to 120 in Figs. 1 and 2)
If the pause switch 321 is operated alone, the set output Q of the first flip-flop circuit 322 and the second flip-flop circuit 32
3 reset output and the AND gate 324
As a result of the pause control signal being supplied to the pause control signal input terminal _T1 of the control circuit 201 through the OR gate 325, the normal pause (temporary stop) state is immediately established at that point without performing any search operation. becomes.

And (0-9) number switches 311-3
If 20 is operated alone, or gate 3
The set output Q from the second flip-flop circuit 323 set via 26 and the reset output of the first flip-flop circuit 322 result in a numeric key input control signal input terminal _T2 of the control circuit 201 via an AND gate 327. As a result of being supplied with the numeric key input control signal, the numeric key input data bus of the control circuit 201 is activated without performing a search operation.
Only numeric key processing (such as during memory operation) that captures numeric key input data is performed for _T3 .

Therefore, the number switch 31 of (0 to 9)
If the pause switch 321 is subsequently operated in a complex manner after the operations 1 to 320, the search control signal of the control circuit 201 is output via the AND gate 328 by each set output Q of the first and second flip-flop circuits 322 and 323. As a result of the search control signal being supplied to the input terminal _T4 , a search operation state is entered in which the previously fetched numeric key input data is used as the target address.

That is, 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 picking up the corresponding song on the disc 206. This is to move it to the department.

When the target address is searched, a search completion detection signal is actually output from the search completion detection circuit 329 provided in the control circuit 201. Then, based on this search end detection signal and the set output Q of the first flip-flop circuit 322, a pause control signal is supplied to the pause control signal input terminal _T1 of the control circuit 201 via the AND gate 330 and the OR gate 325, and as a result, the search is completed. Immediately enters a pause state at the completed position.

In this case, the search end detection signal is sent to the first and second flip-flop circuits 322, 3 through a delay circuit 331 to ensure a pause state.
It is also provided for resetting 23.

In addition, in FIG. 3, the switches corresponding to the operation keys other than the numeric switches (0 to 9) and the pause switch are not shown to simplify the explanation, but they are actually the same as those in FIG. 2. shall be provided in.

That is, by performing a search for the beginning of a desired song by a combined operation of the number switch and the pause switch as described above, and immediately entering the pause state after the search is completed, it is possible to perform the search each time. Compared to the case where the operation is realized by individual operations, the operation can be simplified by eliminating the complexity of the operation, and it is also possible to reliably play from the beginning of the desired song by eliminating the deviation of the cue position due to the delay time of the operation timing. In addition, the numeric switch and pause switch have the advantage of being able to perform their original control operations by operating them individually, and have highly advanced control functions that contribute to improved operability. It can be said that it is something that can be obtained.

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 reliably perform advanced control functions with a simple configuration, especially in a disk record playback device that plays back a disk on which digitized data is recorded. It becomes possible to provide an extremely good disc record playback device that has been improved and can contribute 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 configuration diagram showing the 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
16...First reward key, 117...Play key, 118...Next play key, 119...
Repeat key, 120...Pause key, 121...Stop key, 122-131...Numeric key, 132
...Memory read key, 133...Memory key, 13
4...Clear, 114a...Eject indicator, 1
14b...Search indicator, 114c...Error indicator, 114d...Repeat indicator, 114e...Auto play indicator, 114f...Memory indicator, 11
4g...Memory indicator, 114h...Track number display, 114i...Time display, 114j...Manual display, 114k...Play indicator, 114l...
Pause indicator, 201... Control circuit, 202... Disc playback system, 203... External control circuit, 204... Disc motor, 205... Pick up feed motor, 206... Disk, 207... Pick up,
208...RF signal detection circuit, 209...servo circuit,
210... Demodulation circuit, 211... Address detector, 2
12...D/A converter, 213...RAM, 214...
ROM, 215...Display output control circuit, 216...Speaker, 311-320...Numeric switch, 321
...Pause switch, 322, 323...Flip-flop circuit, 324, 327, 328, 330...
And gate, 325, 326...or gate, 3
29...Search end detection circuit.

Claims (1)

[Claims] 1. In a disk record playback device that plays back a disk 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; means, second means for obtaining a pose state upon operation, and said first means.
A third method for searching for a specified address in a composite operation state of specifying the desired address data by the means and the pause operation by the second means and placing it in a pause state.
A disc record playback device comprising: means.