JP3552570B2 - Random playback device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a random playback apparatus, and more particularly to a method of storing a plurality of disc groups in a storage unit, and randomly selecting a disc and randomly selecting a song track for each song track of each disc and reproducing the music track. To a random playback device that can perform
[0002]
[Prior art]
Discs such as CDs and MDs on which a plurality of music tracks are optically recorded can be accessed instantaneously without jumping to the user's waiting time, such as jumping to an arbitrary track or searching for the desired track. It is widely used because of its excellent sound quality.
[0003]
Such a disk is set in an optical signal reading unit (reproducing unit) and is driven to rotate. In addition, the information on the pit forming surface (recording surface) of the disk is read by a laser beam, and appropriate signal processing is performed. Thereby, a reproduction output signal of an arbitrary music track can be obtained. In addition to reproducing an arbitrary track of the disk, the reproduction order of the music tracks is rearranged for all the music tracks in the disk by using a random number generation method such as an M-sequence, and each music track is cycled once at a time. Random playback can be performed.
[0004]
Generally, random playback in a disc player refers to random playback of music tracks as described above. The same music track is not played twice, but one set of playing cards is mixed well. It is sometimes called shuffle playback because it resembles the operation of extracting cards one by one.
[0005]
In addition to performing random playback on one disc, a plurality of disc groups are stored, a disc is randomly taken out of the disc group, and music tracks of the taken-out disc are selected at random and reproduced. There is a playback device. A specific example of such a random playback device will be described. As shown in FIG. 7, a single bank player, which is a type of random playback device, is provided with a main microcomputer 1 for controlling the overall operation in a complex manner. A sub-microcomputer 2, a key 3, and a display 4 are connected to the main microcomputer 1.
[0006]
The sub-microcomputer 2 mainly controls a later-described bank unit 5 based on a command from the main microcomputer 1. The bank unit 5 is provided with a pickup 5a for reading an optical signal and reproducing a disk, and a disk group including a plurality of (m) disks DISC-1, DISC-2,... DISC-m. It is stored in the storage unit 5b. One disk is taken out of such a disk group, set on the pickup 5a and driven to rotate to obtain a read signal.
[0007]
The bank unit 5 performs a predetermined disk setting operation, a disk unloading operation, and a signal reading operation based on a command from the sub-microcomputer 2 that operates according to a command from the main microcomputer 1. The obtained optical read signal is subjected to demodulation of EFM (8-14 modulation) and code error correction by CIRC or ACIRC by a digital signal processing unit 6, and is converted into a predetermined analog signal by a D / A converter 7. The converted audio output signal OUT is obtained.
[0008]
The key 3 is used to instruct settings for controlling the disk playback operation in the bank unit 5 or to perform "playback, stop, playback track designation, cueing, forward fast forward playback, reverse fast forward playback, search" in a single bank player. For example, the display 4 displays the operation state, the reproduction time, and the like.
[0009]
When random playback is performed in such a single-bank player, the order of the playback tunes from 1 to n as shown by reference numeral a in FIG. Are played back, and the track number of the tune in which the track number is randomly selected is reproduced.
[0010]
Therefore, in the first random reproduction, first, the disk DISC-1 is taken out from the storage section 5b of the bank section 5, is set on the pickup 5a, is driven to rotate at a predetermined speed, and the track No. 15 of the disk DISC-1 is reproduced. Upon completion of the reproduction, the disk DISC-1 is unloaded from the pickup 5a and stored in the storage unit 5b. Immediately after this, the track No. 30 of the disk DISC-2 is reproduced secondly, and similarly, the disk DISC-1 is thirdly reproduced. The track No. 18 of the disc DISC-2 is reproduced fourth, the track No. 16 of the disc DISC-2 is reproduced fourth, and the track No. 32 of the disc DISC-3 is reproduced similarly in the same manner.
[0011]
As shown in the flowchart of FIG. 9, such a random reproduction operation is first determined in step S1 as to whether or not a randomly selected disk is in the storage section 5b. In the case of, the disc is set on the pickup 5a in the next step S2, the playing order of the random playback, that is, the playback track No. is determined, and the process proceeds to the next step S3 to search for the playback track No. and perform the playback. Then, the process proceeds to the next step S4.
[0012]
In step S4, it is determined whether or not the reproduction of one track has been completed. In the case of No, the process waits as it is, and when the determination is Yes, the process proceeds to the next step S5, in which all the discs / tracks are reproduced in one cycle. It is determined whether or not a series of random reproductions has been completed, and in the case of No, the next random reproduction is executed again in steps S3 and S4. A series of random reproductions ends.
[0013]
In the random reproduction performed in this manner, the disk in which the reproduction of the music track of the disk randomly selected by the determination of the reproduction music order has been completed is unloaded and stored in the storage unit 5b, and immediately thereafter, another disk is stored. Since it is necessary to set the pickup 5a, the sound is cut off for several seconds due to the setting / unloading of the disc at the time of switching the order of the reproduced music.
[0014]
Note that when the track numbers of the randomly selected disks are in the same disk, for example, in the case of switching from the playback song order n-1 to the playback song order n shown in FIG. 8, random playback of the two songs is performed. A simple track jump (jump from track No. 24 to track No. 32) in the same disk is sufficient, and no sound interruption occurs for several seconds because the operation of setting / unloading the disk is not required.
[0015]
As an example of preventing such sound interruption, there is a double bank player configured as shown in FIG. That is, as shown in FIG. 10, the double bank player is provided with a main microcomputer 8 for controlling the entire operation in a complex manner, and a sub-microcomputer 9, a display 11 and a key 12 are connected to the main microcomputer 8. I have.
[0016]
The sub-microcomputer 9 mainly controls a later-described double bank unit 20 based on a command from the main microcomputer 8. The double bank unit 20 is provided with two independent systems of a first pickup 20a and a second pickup 20b for reading an optical signal and reproducing a disk. A disk group including a plurality of (n) disks DISC-1, DISC-2,... DISC-n is stored in the storage unit 20c.
[0017]
One disk is taken out of such a disk group, set in the first pickup 20a or the second pickup 20b, and driven to rotate to obtain a read signal. For example, as shown in FIG. 11, the disk DISC-2 in the storage unit 20c of the double bank unit 20 can be set on the second pickup 20b, or the disk DISC-5 can be set on the first pickup 20a.
[0018]
The first pickup 20a performs a predetermined disk setting operation, a disk unloading operation, and a signal reading operation based on a command from the sub-microcomputer 9 that operates according to a command from the main microcomputer 8, and is obtained by the first pickup 20a. The obtained optical read signal is subjected to demodulation of EFM (8-14 modulation) and code error correction by CIRC or ACIRC by a digital signal processing unit 15, and is converted into a predetermined analog signal by a D / A converter 16. The signal is input to one input terminal of a two-input switching type switch unit 19.
[0019]
Similarly to the first pickup 20a, the second pickup 20b performs a predetermined disk setting operation, a disk unloading operation, and a signal reading operation based on a command from the sub-microcomputer 9 which operates according to a command from the main microcomputer 8. The optical read signal obtained by the 2pickup 20b is subjected to demodulation of EFM (8-14 modulation) and code error correction by CIRC or ACIRC by the digital signal processing unit 17, and by the D / A converter 18 The signal is converted into a predetermined analog signal and input to the other input terminal of the switch unit 19.
[0020]
Further, the operation of the system of the first pickup 20a and the system of the second pickup 20b are alternately controlled. When the first pickup 20a is operating, the D / A conversion is performed via the switch unit 19. The output of the device 16 is used as an output signal OUT as a reproduction signal of the first pickup 20a, and when the second pickup 20b is operating, the output of the D / A converter 18 via the switch 19 is output from the second pickup 20b. The output signal OUT is used as a reproduction signal.
[0021]
The key 12 is used to instruct settings for controlling the disk playback operation in the double bank unit 20, or to select "play, stop, play track designation, cueing, forward fast forward playback, reverse fast forward playback, search in the double bank player. And the like, and the display 11 displays the operation state, the reproduction time, and the like.
[0022]
In such a double-bank player, when performing the relay reproduction, the reproduction music order starting from 1 as shown by the symbol b in FIG. 12 is set to the track No. 1 of the disc DISC-1 set in the first pickup 20a. , 2, and 3, the tracks Nos. 1 to 5 of the disc DISC-2 set in the second pickup 20b are sequentially reproduced, and then the tracks Nos. 1 to 7 of the DISC-3 set in the first pickup 20a. Are sequentially reproduced, then the tracks Nos. 1 to 5 of DISC-4 set in the second pickup 20b are reproduced in order, and so on in the same manner as the reproduction of the disc set in the first pickup 20a and the setting in the second pickup 20b. Relay reproduction is performed by alternately performing reproduction of the disc that has been performed.
[0023]
More specifically, in this operation, as shown in the flowchart of FIG. 13, first, it is determined whether or not the disc designated to be reproduced is stored in the storage unit 20c of the double bank unit 20 in step S7. In a certain case (in the case of Yes), in the next step S8, the disk with the lowest number is taken out of the storage unit 20c, set on the first pickup 20a, and the reproduction is started from the track No. Are sequentially reproduced up to the last track No. When the reproduction of the track No. 001 is started, the process proceeds to the next step S9, and the next disk to be reproduced is put on standby.
[0024]
In step S9, it is determined whether or not there is a disc having a number larger than the disc number being reproduced, as in step S9a of the flowchart shown in FIG. 14. If no disc is present (No), the process is terminated. In the case of Yes), in the next step S9b, the disk with the next smaller disk number is set in the second pickup 20b, and the reproduction is paused at the beginning of the track No. 001, that is, in the standby state.
[0025]
After the standby state is set as described above, the process returns to step S10 in FIG. 13, and it is determined whether the reproduction by the first pickup 20a has been completed. At the next step S11, it is determined whether or not there is a disk in the standby state on the second pickup 20b side. If there is no disk (No), the process is terminated. In ()), in the next step S12, the reproduction of the disc set in the second pickup 20b is started from the track No. 001 and is sequentially reproduced until the last track No.
[0026]
This track No. When the reproduction of 001 is started, the process proceeds to the next step S13, and the next disk to be reproduced is on standby. This step S13 determines whether or not there is a disk having a number larger than the disk number being reproduced, as in step S13a of the flowchart shown in FIG. 15. If not (No), the process is terminated. In the case of (Yes), in the next step S13b, the disk with the next smaller disk number is set in the first pickup 20a, and the head of the track No. 001 is set to the reproduction pause state, that is, the standby state.
[0027]
After the standby state is set as described above, the process returns to step S14 in FIG. 13, and it is determined whether or not the reproduction by the second pickup 20b is completed. At the next step S15, it is determined whether or not there is any disk in the standby state on the first pickup 20a side. If there is no disk (No), the operation is terminated, and if there is a disk (Yes). In the case, the reproduction of the disk set in the first pickup 20a is started from the track No. 001 in the next step S16.
[0028]
Thereafter, steps S9 to S14 are performed in the same manner as described above. In other words, the reproduction of the disc set on the first pickup 20a and the reproduction of the disc set on the second pickup 20b are alternately performed. Thus, relay regeneration is performed.
[0029]
In order to perform the random playback by applying the relay playback operation in the double bank player described so far, each of the playback music orders from 1 to n as shown by reference numeral c in FIG. -1 to disc DISC-m are randomly selected and the track No. of the music piece set in the first pickup 20a is selected at random, and then the discs DISC-1 to DISC-m are reproduced. What is necessary is just to play back the random selection of the track No. of the middle tune set in the second pickup 20b from the random selection, and to perform the reproduction alternately.
[0030]
Therefore, in the first random reproduction, first, the disk DISC-1 is taken out from the storage section 20c of the double bank section 20, is set on the first pickup 20a, is driven to rotate in a predetermined manner, and the disk DISC-1 is driven. At the same time when the track No. 15 is reproduced and the reproduction is completed, the disc DISC-1 is unloaded from the first pickup 20a and stored in the storage section 20c. Immediately thereafter, the disc DISC-1 set in the second pickup 20b is secondarily set. Track No. 19 of the second disc is reproduced, track No. 30 of the disc DISC-5 is reproduced third by the first pickup 20a, track No. 8 of the disc DISC-1 is reproduced fourth, and so on. 20a and the second pickup 20b alternately random playback It takes place.
[0031]
As shown in the flowchart of FIG. 17, such random playback operation first determines whether or not the specified disk is in the storage unit 20c of the double bank unit 20 in step S17. In the case of Yes, the performance order of the random reproduction is determined in the next step S18, set to the first pickup 20a, and in the next step S19, the music track for the random reproduction is searched to start the reproduction.
[0032]
Simultaneously with the start of the reproduction, in step S20, the standby of the next music, that is, the setting of the disk to the second pickup 20b is performed. In this step S20, as in step S20a of the flowchart shown in FIG. 18, it is determined whether or not the disk set in the second pickup 20b is the disk number of the music to be reproduced next at random. In the case of No, the reproduction is stopped at the beginning of the random reproduction track No. of the disk set in the second pickup 20b in step S20b, that is, in the standby state.
[0033]
After the standby state is set in this way, the process returns to step S21 in FIG. 17, and it is determined whether or not the one-track reproduction by the first pickup 20a has been completed. When it has become, the process proceeds to the next step S22. Next, it is determined whether or not the number of the randomly reproduced disk is the same as the current disk number. If different (No), the process proceeds to S23, and if YES, Is executed again from step S19 to step S22.
[0034]
In step S23, it is determined whether or not all the songs have been cycled by the above-described random playback. If Yes, the random playback operation is completed. If No, the process proceeds to step S24, where the songs to be randomly played are performed. Search for a track and start playback.
[0035]
Simultaneously with the start of the reproduction, in step S25, the standby of the next music piece, that is, the setting of the disc to the first pickup 20a is performed. In this step S25, as in step S25a of the flowchart shown in FIG. 19, it is determined whether or not the disk set in the first pickup 20a is the disk number of the music to be reproduced next at random. In the case of No, the process is terminated, and in the case of No, the reproduction is paused at the beginning of the random reproduction track No of the disc set in the first pickup 25b in step S25b, that is, the standby state is set.
[0036]
After the standby state is set as described above, the process returns to step S26 in FIG. 17, and it is determined whether or not the one-track reproduction by the second pickup 20b has been completed. When it has become, the process proceeds to the next step S27, next, it is determined whether or not the number of the random reproduced disk is the same as the current disk number. If different (No), the process proceeds to S28, and if YES, Is executed again from step S24 to step S27.
[0037]
In step S28, it is determined whether or not all the disks / tracks have been played back once, that is, whether or not a series of random playbacks has been completed. If No, the next random playback is performed again from step S19 to step S27. Is performed, and a series of random reproductions ends when the determination is Yes.
[0038]
Now, as a form of the double bank player, as shown in FIG. 10, another example in which a disk group is stored in one storage unit 20c and two types of reproduction units of a first pickup 20a and a second pickup 20b are provided. A bank (not shown) and a B bank (not shown) are provided, and a storage unit for storing a disk group and a reproducing unit for reproducing a disk taken out therefrom are provided in each bank. In other words, there is a double bank player having two independent bank sections.
[0039]
In order to perform random reproduction in such a double-bank player, first, in the first random reproduction, a disk No. A1 is set in the A bank in accordance with the order of the reproduced music as indicated by reference numeral d in FIG. Track No. 15 is reproduced, and then, in the second random reproduction, a disk No. B1 is set in the B bank and track No. 19 is reproduced. In the third random reproduction, a disk No. A2 is set in the A bank. The track No. 30 is reproduced, and thereafter, the random reproduction of the disk set in the bank B and the random reproduction of the disk set in the bank A are alternately performed.
[0040]
In such a random reproduction operation, as shown in the flowchart of FIG. 21, first, in step S29, it is determined whether or not the designated disk is in the A bank, and if No, it is added for convenience of drawing. The process proceeds to step S41 of FIG. 22 via the relay point E, and in the case of Yes, the process proceeds to step S30, and it is determined whether or not the designated disk is in the B bank. The process advances to step S46 in FIG. 22 via F, and in the case of Yes, the process advances to step S31.
[0041]
In step S31, the order of the random playback in the bank A is determined. In the next step S32, the order of the random playback in the bank B is determined. To start.
[0042]
Simultaneously with the start of the reproduction, in step S34, the standby for the next music, that is, the disk setting to the B bank is performed. In this step S34, as in step S34a of the flowchart shown in FIG. 23, the disc set in the bank B is set to the reproduction pause state at the beginning of the random reproduction track No, that is, the standby state. .
[0043]
After the standby state is set in this way, the process returns to step S35 in FIG. 21 to determine whether or not the one-track reproduction by the A bank has been completed. At this time, the process proceeds to the next step S36, where it is determined whether or not all the music tracks in the bank A have been reproduced once, and in the case of Yes, the process proceeds to the step S43 shown in FIG. If No, the process proceeds to step S37.
[0044]
In step S37, a search is made for the reproduction music of the bank B already set in step S34, and the reproduction is started. At the same time as the reproduction is started, the standby of the next music is performed in step S38, that is, the disc in the A bank is Perform the set. In this step S38, as in step S38a of the flowchart shown in FIG. 24, the disc set in the A bank is set to the reproduction pause state at the beginning of the random reproduction track No, that is, the standby state. .
[0045]
After the standby state is set as described above, the process returns to step S39 in FIG. 21 to determine whether or not the one-track reproduction by the B bank has been completed. At this time, the process proceeds to the next step S40, in which it is determined whether or not all the music tracks in the bank B have been reproduced once, and in the case of Yes, the process proceeds to the step S47 shown in FIG. If No, steps S33 to S40 are executed again.
[0046]
By the way, in the case of No in step S29 (when the disk is not in the A bank), it is determined in step S41 shown in FIG. 22 whether the disk is in the B bank, and in the case of No, the process is terminated. In the case of Yes, the playing order of the random playback in the B bank is determined in step S42, the determined music is started to be played in step S43, and in the next step S44, the playback of one track in the B bank is completed. In the case of No, a standby state is set. In the case of Yes, the process proceeds to step S45, and it is determined whether or not all the songs have been cycled by random reproduction of the B bank. It is determined that the reproduction operation has been completed, and in the case of No, the process returns to step S43, and steps S43 to S45 are executed again.
[0047]
On the other hand, if step S30 in FIG. 21 is No, the process proceeds to step S46 shown in FIG. 22, the play order of random playback in the A bank is determined, and the determined music is played back in step S47. In S48, it is determined whether or not the reproduction of one track in the A bank is completed. If No, the standby state is set. If Yes, the process proceeds to step S49, and all the songs are reproduced by random reproduction of the A bank. It is determined whether or not one round has been completed. If Yes, the random reproduction operation is completed. If No, the process returns to Step S47, and Steps S47 to S49 are executed again.
[0048]
In the above-described double-bank player, if the number of reproduced songs of the disk group stored in the A bank is different from the number of reproduced songs of the disk group stored in the B bank, for example, the number of reproduced songs in the B bank is larger. As shown in FIG. 20, since the random reproduction in the A bank is completed when the reproduction music order is (m + 4), the subsequent random reproduction is performed in the disk group in the B bank. Become.
[0049]
Therefore, when the random reproduction by the B bank is performed on the track of the same disk, if the reproduction music order is, for example, (n-7) and (n-6), no sound break occurs, but the random reproduction by the B bank is performed. When performed on different discs, if the playback music order is, for example, (n-8) or (n-7), the sound will be interrupted.
[0050]
[Problems to be solved by the invention]
2. Description of the Related Art A conventional random playback device, particularly a double-bank player, takes out one of a plurality of first disc groups housed in a first storage unit, sets it, and drives it to rotate to reproduce a music track. A second disc capable of reproducing a music track by taking out one of a plurality of second disc groups housed in a second storage unit, taking out one of the first and second disc groups housed in a second storage unit, and setting and rotating the same. A second disk bank unit provided with a first storage unit, wherein the first playback unit stores the respective music tracks of the disk group stored in the first storage unit and the disk group stored in the second storage unit. And the second reproducing unit are alternately operated to randomly select and reproduce the music tracks of the disk group. Therefore, the following problem arises.
[0051]
When the total number of music tracks of the first disk group is different from the total number of music tracks of the second disk group, after random reproduction of the smaller disk group is completed, only one of the disk groups is used. In order to perform random playback, it is necessary to exchange disks when performing random playback. At the time of this exchange, the sound is interrupted, and the user has to wait until the next song is played randomly, resulting in a feeling of operation. May be reduced.
[0052]
A mechanical drive operation sound is generated each time a disk is exchanged during random playback, and the drive operation sound alternately activates the first disk bank and the second disk bank. When random playback is being performed, a playback sound is being generated from either one of the disk banks, and although this is not so noticeable at this time, the first disk bank and the second disk bank cannot be reproduced. At the time of random reproduction in which only one random reproduction is completed and the other is performed only in the disk bank portion, the sound is interrupted between songs and there is a silent state. Particularly noticeable, there is a possibility that the user may feel uncomfortable.
[0053]
Therefore, an object of the present invention is to provide a random playback apparatus capable of minimizing the occurrence of a sound break between music pieces when playing a plurality of discs at random and giving the user unpleasant feeling as much as possible. Is to provide.
[0054]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the random reproduction device according to the present invention employs the following characteristic configuration.
[0055]
(1) A first disk bank provided with a first reproducing unit capable of reproducing a music track by taking out one of a plurality of first disk groups housed in a first storage unit, setting the same, and rotating and driving the same. A second disk bank provided with a unit and a second reproducing unit that can take out one of a plurality of second disk groups housed in a second storage unit, set the disk group, and rotate and reproduce the music track. And a track group of the disk group stored in the first storage unit and the track group of the disk group stored in the second storage unit are alternately switched between the first playback unit and the second playback unit. In the random playback apparatus which can be operated to randomly select and play the music tracks of the disk group, the total number of music tracks of the first disk group stored in the first storage unit and the music tracks stored in the second storage unit Of the track of the second disk group By comparing the numbers, the random selection of the music track reproduction of the disk set in the “first reproduction unit or the second reproduction unit”, whichever is larger, is selected a plurality of times in the same disk. Is provided with a control unit.
[0056]
(2) When the random number reproduction is completed after one of the music tracks of the first or second disk group makes a round, the control unit of (1) sets a disk having the other unplayed music track. It is configured that random playback is performed sequentially on unplayed music tracks in the same disk.
[0057]
(3) The controller of (1) sets the disk having the other unplayed music track when the music track of one of the first and second disk groups makes a round and the random reproduction is completed. In the same disk, random playback is sequentially performed on the unplayed music tracks, and when the music tracks of the disc make a round and random playback is completed, a disc having another unplayed music track is set and the same disk is loaded. , The random playback is sequentially performed on the unplayed music tracks.
[0058]
(4) A first disk bank provided with a first reproducing unit capable of reproducing a music track by taking out one of a plurality of first disk groups stored in a first storage unit, setting the same, and rotating and driving the same. A second disk bank provided with a unit and a second reproducing unit that can take out one of a plurality of second disk groups housed in a second storage unit, set the disk group, and rotate and reproduce the music track. And a track group of the disk group stored in the first storage unit and the track group of the disk group stored in the second storage unit are alternately switched between the first playback unit and the second playback unit. In the random reproduction device which can be operated to select and play the music tracks of the disk group at random, the total number of music tracks of the first disk group and the total number of music tracks of the second disk group are made to correspond to each other, The first reproducing unit and the second reproducing unit Providing a control unit for controlling the number of random playback of the music track by a single set so that the disk set number is the same in part.
[0059]
(5) A first disk bank provided with a first reproducing unit capable of reproducing a music track by taking out one of a plurality of first disk groups stored in a first storage unit, setting the same, and rotating and driving the same. A second disk bank provided with a unit and a second reproducing unit that can take out one of a plurality of second disk groups housed in a second storage unit, set the disk group, and rotate and reproduce the music track. And a track group of the disk group stored in the first storage unit and the track group of the disk group stored in the second storage unit are alternately switched between the first playback unit and the second playback unit. In the random reproduction apparatus which can be operated to select the music tracks of the disk group at random and alternately reproduce the music tracks on one disk at a time, one of the music tracks of the first or second disk group makes one round. And random playback ends Provided a control unit for controlling to sequentially randomly reproduce intended for unplayed songs track within the same disk by setting a disc having a non-reproducing music track of the other.
[0060]
(6) The control unit according to any one of (1) to (5) is configured to be able to temporarily suspend the random reproduction of an arbitrary music track of an arbitrary disk during the random reproduction and reproduce the same.
[0061]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block circuit diagram showing an overall configuration of a double bank player which is an example of a random playback device according to the present invention. As shown in FIG. A microcomputer 8 is provided, to which two sub-microcomputers 9 and 10, a display 11 and a key 12 are connected.
[0062]
A bank A section 13 is connected to the sub-microcomputer 9, and a bank B section 14 is connected to the sub-microcomputer 10. The bank A unit 13 takes out one of a plurality of first disk groups housed in a first storage unit (storage unit 13b), sets the disk group, and rotates and drives the first disk group to reproduce a music track. A first disk bank unit provided with a unit (pickup 13a) is provided, and a bank B unit 14 takes out one of a plurality of second disk groups housed in a second storage unit (storage unit 14b). A second disk bank unit provided with a second reproducing unit (pickup 14a) capable of reproducing a music track by being set and driven to rotate.
[0063]
Then, the music tracks of the disk group stored in the storage unit 13b and the disk group stored in the storage unit 14b are alternately operated by the pickups 13a and 14a to randomly change the music tracks of the disk group. A double-bank player that can be selectively reproduced is configured.
[0064]
The pickup 13a of the bank A unit 13 performs a predetermined disk setting operation, a disk unloading operation, and a signal reading operation based on a command from the sub-microcomputer 9 operated by a command from the main microcomputer 8, and is obtained by the pickup 13a. The read optical signal is subjected to demodulation of EFM (8-14 modulation) and code error correction by CIRC or ACIRC by a digital signal processing unit 15, and is converted into a predetermined analog signal by a D / A converter 16. The signal is input to one input terminal of a two-input switching type switch unit 19.
[0065]
Similarly to the pickup 13a, the pickup 14a of the bank B unit 14 performs a predetermined disk setting operation, a disk unloading operation, and a signal reading operation based on a command from the sub-microcomputer 10 that operates according to a command from the main microcomputer 8. The optical read signal obtained by the pickup 14 a is subjected to demodulation of EFM (8-14 modulation) and code error correction by CIRC or ACIRC by a digital signal processing unit 17, and is subjected to predetermined processing by a D / A converter 18. And is input to the other input terminal of the switch unit 19.
[0066]
The operation of the system of the pickup 13a and the system of the pickup 14a are alternately controlled. When the operation of the pickup 13a is in operation, the output of the D / A converter 16 via the switch unit 19 is output to the operation of the pickup 13a. The reproduced signal is an output signal OUT. When the pickup 14a is operating, the output of the D / A converter 18 is output via the switch unit 19 as the reproduced signal of the pickup 14a.
[0067]
The key 12 is used to instruct settings for controlling the disk playback operation in the double bank unit 20, or to select "play, stop, play track designation, cueing, forward fast forward playback, reverse fast forward playback, search in the double bank player. And the like, and the display 11 displays the operation state, the reproduction time, and the like.
[0068]
When random playback is performed in such a double-bank player, the track of the disc No. A1 set on the pickup 13a of the bank A section 13 is the first in the order of the playback music as indicated by the symbol e in FIG. The random reproduction of No. 15 was performed. In the second, the random reproduction of the track No. 19 of the disk No. B1 set in the pickup 14a of the bank B unit 14 was performed. In the third, the reproduction was set in the pickup 13a of the bank A unit 13. At random, track No. 30 of disk No. A2 is reproduced at track No. 30, and at the fourth time, track No. 8 of disk No. B1 set on pickup 14a of bank B section 14 is reproduced at random.
[0069]
Similarly, the random reproduction by the bank A unit 13 and the random reproduction by the bank B unit 14 are performed alternately, and when the reproduction music order is, for example, (m + 4), the random reproduction by the bank A unit 13 is completed. , Random reproduction by only the bank B unit 14, that is, a disk having an unreproduced track among the disks in the bank B unit 14 is randomly selected, and random reproduction is performed in the same disk.
[0070]
If there are two discs having unplayed tracks among the discs in the bank B section 14, for example, disc No. B3 and disc No. B2, the disc No. B3 is set when the reproduction music order is (m + 5) and the track is set. No. 24, 4, 7,..., 1 and 5, random reproduction is performed, and when all the music tracks of the disc No. B3 have been completely reproduced, the disc No. B3 is unloaded, a new disc No. B2 is set, and the tracks No. 10, 7,. The reproduction is performed as 16 and 21, and a series of random reproduction ends.
[0071]
Here, when the disc is exchanged, that is, when the disc is changed from the disc No. B3 to the disc No. B2, the sound is interrupted. However, when the disc No. B3 and the disc No. B2 are randomly reproduced in the same disc, the sound is interrupted due to a track jump. Does not occur.
[0072]
More specifically, as shown in the flowchart of FIG. 3, in this operation, it is first determined in step S46 whether or not the disc designated for reproduction is in the storage unit 13b of the bank A unit 13; ), The process proceeds to step S69 of the flowchart shown in FIG. 4 via the relay point B, and if there is (Yes), it is determined in the next step S47 whether the disk is in the storage unit 14b of the bank B unit 14. Is determined (No), the process proceeds to step S62 of the flowchart shown in FIG. 4 via the relay point A, and if there is (Yes), the process proceeds to the next step S48.
[0073]
This step S48 is for determining the order of random reproduction in the bank A unit 13, the next step S49 is for determining the order of random reproduction in the bank B unit 14, and the next step S50 is to determine the order of random reproduction in the bank A unit. 13 starts random reproduction.
[0074]
Simultaneously with the start of the reproduction, the disk to be reproduced next in the bank B unit 14 is standby in step S51. In this step S51, as in step S51a shown in FIG. 5, the next disk to be reproduced is set on the pickup 14a, and the reproduction is temporarily stopped at the head of a randomly designated music track, that is, the disk is put into a standby state.
[0075]
After the standby state is set in this way, the process returns to step S52, where it is determined whether or not the reproduction of the music track by the bank A unit 13 has been completed. At the next step S53, it is determined whether or not the random reproduction in the bank A unit 13 has completed all the songs. If Yes, the process proceeds to step S54, where the random reproduction music in the bank B unit 14 is deleted. In step S55, the unplayed music left in the storage section 14b in the bank B section 14 is divided for each disc to determine the performance order of random playback, and the playback order is determined via the relay point D in FIG. Proceed to step S73.
[0076]
On the other hand, if No in step S53, random playback by the bank B unit 14 is started in step S56. Simultaneously with the start of the reproduction, the disk to be reproduced next in the bank A unit 13 is put on standby in step S57. In this step S57, as in step S57a shown in FIG. 6, the disk to be reproduced next is set on the pickup 13a, and the reproduction is temporarily stopped at the head of the music track designated at random, that is, in the standby state.
[0077]
After the standby state is set in this way, the process returns to step S58, where it is determined whether or not the reproduction of the music track by the bank B unit 14 has been completed. At this time, the process proceeds to the next step S59, where it is determined whether or not the random playback in the bank B unit 14 has completed all the songs. If Yes, the process proceeds to step S60, where the random playback song in the bank A unit 13 is deleted. In step S61, the unplayed music left in the storage unit 13b in the bank A unit 13 is divided for each disc to determine the playing order of random playback. Proceed to step S65.
[0078]
On the other hand, if No in step S59, steps S50 to S59 described above are re-executed.
・ ・ ・ ・ ・
[0079]
Now, in the case of No in step S47, that is, in the case where the disk is not in the bank B section 14, the step S62 (FIG. 4) executed is performed by dividing the random reproduction in the bank A section 13 for each disk into a random reproduction performance order. In the next step S63, a disk of the bank A section 13 is randomly determined.
[0080]
Then, in the next step S64, a search is made for random reproduction music of the current disk and reproduction is started. In the next step S65, it is determined whether or not reproduction of the music track by the bank A unit 13 has been completed. Is set to a standby state, and when the determination is Yes, the process proceeds to the next step S66, where it is determined whether the random reproduction in the bank A unit 13 has completed all the songs, and in the case of Yes, the process proceeds to step S67. It is determined in the bank A section 13 whether or not there is a disc with unplayed music. If No, the program is determined to be completed. If Yes, the disc with unplayed music is randomized in the next step S68. Is returned to step S64, and steps S68 and S68 are executed again.
[0081]
Now, in the case of No in step S46, that is, in the case where the disk is not in the bank A section 13, the step S69 executed is to determine whether or not the disk is in the bank B section 14, In this case, the process is completed, and in the case of Yes, the process proceeds to the next step S70, and “from step S70 to step S76” is executed.
[0082]
Note that these operations from “Step S70 to Step S76” are performed by replacing the above-described operations from “Step S62 to Step S68” targeting the bank A unit 13 with operations targeting the bank B unit 14. The description is omitted here.
[0083]
Therefore, the random reproduction by the bank A unit 13 and the random reproduction by the bank B unit 14 are alternately performed. When the random reproduction of one of the bank A unit 13 and the bank B unit 14 is completed, the other bank performs A disc with unplayed music remaining is randomly selected and set, and random playback is performed on unplayed music tracks of the set disc.
[0084]
The present invention is, of course, not limited to the above-described embodiments, but may employ various modified embodiments.
[0085]
For example, the total number of music tracks of the disk group stored in the storage unit 13b of the bank A unit 13 is compared with the total number of music tracks of the disk group stored in the storage unit 14b of the bank B unit 14. The random selection of the reproduction of the music track of the disc set in the “pickup 13a or pickup 14a” may be controlled so as to be selected a plurality of times in the same disc.
[0086]
In addition, one of the music tracks of the disk group stored in the storage unit 13b of the bank A unit 13 and the music track of the disk group stored in the storage unit 14b of the bank B unit 14 makes a circuit. When the random reproduction is completed, a disk having the other unreproduced music track may be set, and the random reproduction may be sequentially performed on the unreproduced music tracks in the same disk.
[0087]
Further, when the music tracks of one of the disk groups make a round and the random reproduction is completed, the disks having the unplayed music tracks of the other disk group are set, and the unplayed music tracks are sequentially targeted within the same disk. At the same time as performing the random playback and completing the random playback after the song tracks of the disc have made a round, a disc having another unplayed song track is set, and random playback is sequentially performed on the unplayed song tracks in the same disc. It may be configured as follows.
[0088]
The number of random reproductions of music tracks by one set is made to correspond to the total number of music tracks in each of the two disk groups, so that the numbers of disk sets in the bank A section 13 and the bank B section 14 are the same. May be controlled.
[0089]
Furthermore, if it is configured such that the random reproduction can be temporarily interrupted and reproduced for an arbitrary music track of an arbitrary disk during the random reproduction, the desired music can be reproduced during the random reproduction or the random reproduction can be performed. This is extremely convenient because repeat playback of the currently played song can be performed.
[0090]
【The invention's effect】
As described above, according to the random playback device of the present invention, when the total number of music tracks of the two disk groups is different, after the random playback of the smaller disk group is completed, one of the disk groups is terminated. Since the disk selected at random is played back only by itself, it is possible to minimize the number of times that the disk needs to be replaced at the time of random playback, and it is possible to minimize the interruption of sound when the disk is replaced.
[0091]
Also, the number of random reproductions of music tracks by one set is controlled so as to correspond to the total number of music tracks in each of the two disk groups so that the numbers of disk sets in the two banks are the same. With this configuration, it is possible to provide a random playback device without any sound interruption.
[0092]
When the disc is an MD, it takes a long time to obtain additional data such as a recorded title and a track number, and a delay time to display the additional data. However, the present invention reduces the frequency of disc replacement. Therefore, the problem due to such a delay hardly occurs.
[0093]
Therefore, according to the random playback device of the present invention, it is possible to minimize the number of sound breaks generated between music pieces during random playback of a plurality of discs, and to minimize discomfort to the user. You can.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main circuit portion of a random playback device according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining a random reproduction order of the random reproduction device shown in FIG. 1;
FIG. 3 is a flowchart for explaining a random playback operation of the random playback device shown in FIG. 1;
FIG. 4 is a flowchart connected to the flowchart shown in FIG. 3;
FIG. 5 is a flowchart showing details of one step shown in FIG. 3;
FIG. 6 is a flowchart showing details of one step shown in FIG. 3;
FIG. 7 is a block diagram showing a main part of a circuit of an example of a conventional random reproducing apparatus.
FIG. 8 is a diagram for explaining a random reproduction order of the random reproduction device shown in FIG. 7;
FIG. 9 is a flowchart for explaining a random playback operation of the random playback device shown in FIG. 7;
FIG. 10 is a block diagram showing a main part of a circuit of another example of the conventional random reproducing apparatus.
FIG. 11 is a block diagram used for describing the operation of the double bank unit shown in FIG.
FIG. 12 is a diagram for explaining a relay reproduction order of still another example of the conventional random reproduction device.
FIG. 13 is a flowchart illustrating a detailed operation of a relay reproduction order shown in FIG. 12;
FIG. 14 is a flowchart showing details of one step shown in FIG. 13;
FIG. 15 is a flowchart showing details of one step shown in FIG. 13;
FIG. 16 is a diagram for explaining a random reproduction order of still another example of the conventional random reproduction device.
FIG. 17 is a flowchart illustrating a detailed operation of a random reproduction order shown in FIG. 16;
FIG. 18 is a flowchart showing details of one step shown in FIG. 17;
FIG. 19 is a flowchart showing details of one step shown in FIG. 17;
FIG. 20 is a diagram for explaining a random reproduction order of still another example of the conventional random reproduction device.
FIG. 21 is a flowchart for explaining the operation in the random reproduction order shown in FIG. 20;
FIG. 22 is a flowchart connected to the flowchart shown in FIG. 21;
FIG. 23 is a flowchart showing details of one step shown in FIG. 21;
FIG. 24 is a flowchart showing details of one step shown in FIG. 21;
[Explanation of symbols]
8 Main microcomputer
9, 10 Sub microcomputer
11 Display
12 keys
13 Bank A
13a, 14a pickup
13b, 13b storage unit
14 Bank B
15 Digital signal processing section
16 D / A converter
17 Digital signal processing section
18 D / A converter
19 Switch section

Claims (6)

A first disk bank unit provided with a first reproduction unit that can take out one of a plurality of first disk groups stored in the first storage unit, set the disk group, and rotate and drive to reproduce a music track; A second disk bank unit provided with a second reproducing unit capable of reproducing a music track by taking out one of the plurality of second disk groups housed in the second storage unit, setting and rotating the disk unit, and The first and second reproduction units are alternately operated by operating the respective music tracks of the disk group stored in the first storage unit and the disk group stored in the second storage unit. A random playback device capable of randomly selecting and playing back music tracks of the disk group,
The total number of music tracks of the first disk group stored in the first storage unit is compared with the total number of music tracks of the second disk group stored in the second storage unit. A control unit is provided for controlling random selection of music track reproduction of a disk set in the first reproduction unit or the second reproduction unit to be selected a plurality of times in the same disk. Random playback device. When random playback is completed after one track of one of the first and second disk groups has completed the random playback, the control unit sets a disk having the other unplayed track and sets the unplayed track in the same disk. 2. The random playback device according to claim 1, wherein random playback is sequentially performed on tracks. When random playback is completed after one track of one of the first and second disk groups has completed the random playback, the control unit sets a disk having the other unplayed track and sets the unplayed track in the same disk. Tracks are played back sequentially in random order, and when the song tracks on the disc have completed one cycle and random playback has been completed, a disc having another unplayed song track is set, and the unplayed song tracks in the same disc are targeted. 2. The random reproduction apparatus according to claim 1, wherein the random reproduction is sequentially performed. A first disk bank unit provided with a first reproduction unit that can take out one of a plurality of first disk groups stored in the first storage unit, set the disk group, and rotate and drive to reproduce a music track; A second disk bank unit provided with a second reproducing unit capable of reproducing a music track by taking out one of the plurality of second disk groups housed in the second storage unit, setting and rotating the disk unit, and The first and second reproduction units are alternately operated by operating the respective music tracks of the disk group stored in the first storage unit and the disk group stored in the second storage unit. A random playback device capable of randomly selecting and playing back music tracks of the disk group,
One time so as to correspond to the total number of music tracks of the first disk group and the total number of music tracks of the second disk group, so that the number of disk sets in the first reproduction unit and the second reproduction unit is the same. A random playback device provided with a control unit for controlling the number of random playbacks of the music track by the set of (i). A first disk bank unit provided with a first reproduction unit that can take out one of a plurality of first disk groups stored in the first storage unit, set the disk group, and rotate and drive to reproduce a music track; A second disk bank unit provided with a second reproducing unit capable of reproducing a music track by taking out one of the plurality of second disk groups housed in the second storage unit, setting and rotating the disk unit, and The first and second reproduction units are alternately operated by operating the respective music tracks of the disk group stored in the first storage unit and the disk group stored in the second storage unit. A random reproduction apparatus capable of randomly selecting music tracks of the disk group and alternately reproducing the music on one disk at a time,
When one of the music tracks in the first or second disk group makes a round and random playback is completed, a disc having the other unplayed music track is set and an unplayed music track is targeted in the same disc. And a control unit for controlling the random reproduction in order. 6. The control unit according to claim 1, wherein the control unit is configured to be able to temporarily stop the random reproduction and reproduce an arbitrary music track of an arbitrary disk during the random reproduction. 3. The random playback device according to 1.

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