JPS63149892A - Program music selection controller for automatic changer - Google Patents

Abstract

PURPOSE:To improve operability at the time of transforming a recording medium stored in a storing part by designating a reproducing music and erasing only the data of a recording medium number corresponding to the recording medium taken from the storing part from a memory. CONSTITUTION:After the program reproducing music is designated, when the CD stored in the storing part is taken out, an inject key C corresponding to an operating key 6 is operated, and then, the key is detected by a detecting means 17 and the data corresponding thereto is written in a register 18. After the program reproducing music is designated, a disk number is stored in the sequence of addresses and the data of a music number is stored in the designated sequence in the memory 12. According to the operating step of a register 21, the data of the disk number is transferred to the register 16 from the memory 12. The data from the registers 18 and 16 is compared in a comparison means 19, When the coincidence of the two data is detected, the disk number is erased from the memory 12 by a data erasing control means 22 according to the coincidence output from the means 19.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention is characterized in that a plurality of recording media on which information such as music is completely recorded is stored in a storage section, and the recording medium to be played back can be automatically exchanged and Regarding a program selection control device for an autochanger device with a program selection function that allows playback in a specified order by arbitrarily specifying a medium number and a track number, the program selection control device is particularly suitable for use in an autochanger device of a compact disc player. Regarding a control device.

(B) Conventional technology In recent years, CD players that use optical pickups to optically read out CDs (compact discs), which have protrusions called bits that correspond to digital signals that serve as music information, formed on the signal surface have become popular. Ta. The CD' player is
It has good frequency characteristics, dynamic range, S/N ratio, etc., and has much better characteristics than conventional analog players, and the disc is easy to handle.
Because of its small size, it has recently become the mainstream source device for stereo sets. In addition to the music information, the CD records information called a subcoding signal, which is played back to complete one block at a cycle of 1/75 seconds, and is composed of eight P-W channels. The P channel contains position index information indicating the beginning of the song, and the Q channel includes position index information indicating the absolute elapsed time from the start point of the signal track, the elapsed time for each song, the song number, etc. Therefore, the CD player can easily locate the beginning of a predetermined song. Therefore, in a CD player, you can specify the song number on the disc, store the specified song number as data in the memory in order, and then read the data from the memory in the order in which it was stored. Many of them are equipped with a program selection function that allows playback (program playback) in the order in which they are played.

Incidentally, recently, there has been known an autochanger device for a CD player that takes advantage of the small size of the disc to store a plurality of CDs in a storage section and automatically changes the CD to be played. In addition to specifying the song number, the autochanger device can specify the CD number, that is, the CD disc number, which is set according to the storage position in the storage section, as shown in Japanese Patent Application Laid-Open No. 60-40561. Since the autochanger device is equipped with a similar program selection function, the autochanger device can continuously play desired songs without changing CDs manually, and can play continuously for a long time. I can do it.

(c) Problems to be Solved by the Invention However, in the conventional autochanger device having the program selection function as described above, a plurality of CDs are stored in a storage section in advance, and then the storage section is manually placed in a predetermined position of the autochanger device. This is probably due to the fact that the so-called cartridge type is the mainstream, but when a CD is pulled out from the storage compartment, the disc number and track number specified for program playback are played. All data was erased regardless of the disc number of the CD from which it was extracted. Therefore, when playing the program again with only the CD stored in the storage section and the songs specified in the program selection other than the songs recorded on the pulled-out CD,
Since it was necessary to store the data corresponding to the song for program playback in the memory again, it was necessary to perform the operation of specifying the disk number and track number again, and it was also necessary to specify the song for program playback. After finishing,
When replacing a CD stored in the storage section, the designation of the songs recorded on the CD that is not being replaced is also canceled, so in this case as well, the operation of designating the disc number and track number had to be performed again. . However, if the data corresponding to the disc number of the pulled-out CD is not erased, the fact that the CD is not stored will be detected only after the mechanism for transporting the CD is activated, resulting in a time loss, which is undesirable.

(d) Means for Solving Problems The present invention provides a memory in which the recording medium number and song number specified at the time of program selection are stored in the specified order as a set of data, and a detecting means for detecting a recording medium number corresponding to the recording medium; a comparing means for sequentially comparing the recording medium number detected by the detecting means with the recording medium number of the data completely stored in each address of the memory; The apparatus further includes data erasure control means for erasing data when data having the same recording medium number as the recording medium number detected by the detection means is detected in the memory by the comparison means.

(*) Function The program selection control device of the autochanger device according to the present invention uses the recording medium number corresponding to the recording medium taken out from the storage section by the comparison means and the program specified at the time of song selection stored in each address of the memory. The data storage medium numbers are sequentially compared, and the data erasure control means determines whether the storage medium number corresponding to the storage medium taken out from the storage section by the comparison means matches the storage medium number of the data that has been completely stored in the memory. When detected, the data is erased, and only data having a recording medium number corresponding to the recording medium taken out from the storage section is erased from the memory.

(f) Embodiment Figure 2 is a block diagram showing the control system of an autochanger device for a CD player. In the figure, (1) projects a light beam onto a CD and receives the reflected light reflected from the signal surface of the CD. At the same time, an optical pickup (2) has an optical sensor (not shown) for performing focusing control to converge the light beam on the signal surface of the CD and tracking control to follow the signal track of the CD; A reproducing circuit (3) is provided in the reproducing circuit (2) and reproduces the signal recorded on the CD as an audio signal using the signal picked up by the optical pickup knob (1).
Regenerates the clock for digital processing of the signal picked up by the clock, performs digital processing based on the clock, and generates information signals (music information), frame synchronization signals, subcoding signals, and error correction/error detection. A signal processing circuit (4) is supplied with the sub-coding signal detected by the signal processing circuit (3) and is included in the sub-coding signal. The display (5) is displayed based on position index information (absolute elapsed time, elapsed time for each song, song number, index, etc.), and the operation keys (6) consisting of matrix keys are displayed.
), (7) is a tracking control signal obtained from the optical sensor of the optical pickup/Z-up (1) and a control signal from the microcomputer (4). A knob drive circuit (8) moves the irradiation point of the light beam of the optical pickup (1) according to the timing of the disc drive; The CD loaded on the turntable is transferred to be loaded on the turntable, and the CD loaded on the turntable is transferred together with the tray to be returned to the storage section, and the CD stored in the storage section is pressed together with the tray by pressing the eject key (6). A disk exchange mechanism (9) selectively moves the disk to a disk attachment/detachment position protruding forward from the storage section in response to an operation, and (9) drives the disk exchange mechanism (8) in accordance with a command from the microcomputer 4). This is a disk exchange drive circuit that performs the following.

By the way, as shown in FIG. 1 showing an embodiment of the present invention, the microcomputer (4) has operation keys (6) for specifying the disc number of the CD to be played and the song number of the song to be played.
) Disc number/track number manual control means (1) which detects which of the disc number key (A) and track number key (B) has been fully operated and generates a signal corresponding to the operated key.
0), a memory switch (11) that is operated when specifying the disc number and track number during program playback, and each time the memory switch (11) is operated, the disc number and track number are stored in the storage unit at the same address. Human control means (10)
A playback disc number/track number memory (12
) and the beginning of the song with the said song number based on the information recorded in the lead-in area of the CD according to the song number data indicating the song number stored in the playback disc number/track number memory (12). At the same time, the absolute elapsed time of the beginning of the core and the absolute elapsed time obtained from the Q channel of the subcoding signal detected by the subfood detection means (13) of the signal processing circuit (3) as the CD is played are detected. A search for comparing the elapsed time and supplying a control signal according to the comparison to the pickup drive circuit (7) to search for a song with the song number stored in the playback disk number/track number memory (12). A control signal is supplied to the disc exchange drive circuit (9) to drive the disc exchange mechanism (8) in accordance with the disc number data read from the control means (14) and the playback disc number/track number memory <12). A disk exchange control means (15) for temporarily storing the data read from the playback disk number/track number memory (12).A disk number register (16) and a tray for specifying the tray to be transferred to the disk loading/unloading position. an eject tray number detecting means (17) for detecting which key of the eject tray number key (C) of the operation key (6) to be operated is operated, and generating a signal corresponding to the operated key; An erased disk number register (18) that temporarily stores data corresponding to the eject tray number detected by the eject tray number detection means (17); Comparison means (19) for comparing the data stored in the disc number register (16), and the reproduction disc number in which data corresponding to the disc number and track number last specified by the operation key (6) has been stored. - Maximum address detection means (20) that detects the maximum address of the track number memory (12) and sets a numerical value according to the maximum address; and The maximum address detection means <
a work step register (21) to which the numerical value set by step 20) is transferred and the numerical value is counted down sequentially each time the comparing means (19) performs a comparison; Activates when a data match is detected and erases the data stored in the address corresponding to the numerical value set in the work step register (21>) of the playback disc number/track number memory (12). Data erasure control means (22)
and end detection means for detecting that the numerical value set by the maximum address detection means (20) or the numerical value set by the work step register (21) has become "0" and detecting the end of program playback. (23>).In FIG. 2, the same circuits as in FIG. 1 are given the same figure numbers.

Next, the operation of the block diagram shown in FIG. 2 will be explained using the block diagram shown in FIG.

To perform program playback, first enter the disc number that indicates the storage position of the CD on which the song you want to play is stored in the storage section, and the track number that indicates the number of songs on the CD in that direction. Disk number key (A) for key (6)
and the song number key (B), and each time the designation is made, the memory switch (11) is operated. Then, each time the memory switch (11) is operated, the data of the disc number and track number corresponding to the operation of the disc number key (A> and the track number key (B)) is transferred to the disc number/track number manual control means< 10), the disc number data and the track number data are sequentially stored as one set at the same address in the reproduction disc number/track number memory (12). Therefore, by repeating the above-mentioned operations, it is possible to store the specified disk number and song number data in the reproduction disk number/track number memory (12) in the specified order.

After writing the data corresponding to the song to be played into the playback disc number/track number memory (12), the next step is to perform the playback operation. Then, the playback disc number/track number memory (12
A control signal is supplied from the disk exchange control means (15) to the disk exchange drive circuit (9>) in accordance with the data of the disk number stored at the first address of ), that is, the data of the first designated disk number. Therefore, after the CD with the disc number is pulled out from the storage unit by the disc exchange mechanism (8) and transported to the playback position, the CD starts to rotate and a light beam is projected from the optical pickup (1). Therefore, the optical pickup <1> starts playing back the signal recorded on the CD.

When playback of the CD is started and the lead-in area of the CD is read, a search for the first designated song number is performed. In this case, the song number data of the data stored in the first address of the playback disc number/track number memory (12) has been read out by the search control means (14) by the playback operation, and the song number data is Based on the lead-in area information, the song number data is converted into absolute elapsed time data at the beginning of the song. On the other hand, by optical pickup (1), C
When the signal recorded in D is picked up and the picked up signal is played back by the playback circuit (2), the subcode detection means (13) of the signal processing circuit (3) of the playback circuit (2) detects the above-mentioned signal. A sub-coding signal recorded on the CD is detected. Then, the search control means (14) compares the absolute elapsed time data of the beginning of the target song obtained from the lead-in area with the absolute elapsed time data of the sub-coding signal, and performs control according to the comparison. The signal is supplied to the pickup drive circuit (7). Therefore, since the projection point of the light beam of the optical pickup (1) is moved to the beginning of the target song, reproduction of the first specified song is started.

As the playback progresses and eventually the playback of the first specified song is completed, a change in the song number is detected by the subcoding signal obtained from the subcode detection means (13), and the light beam of the optical pickup (1) is projected. It is detected that the point has moved to the next song. Here, search control means (14)
, the data for the song that has been played up to now will be replaced, and the data for the next song to be played has already been read from the playback disc number/track number memory (12), so as mentioned above, the new data will be used as the basis. In this case, if the disc number of the CD that has been played so far and the disc number of the CD to be played next are the same, the disc exchange control means (15) sends a control signal. The search control means (14) only searches for the song number of the song to be played in the same manner as described above, without generating a CD or replacing the CD.

On the other hand, if the disc number of the CD that has been played so far differs from the disc number of the CD to be played next, a control signal corresponding to the disc number to be played next is sent from the disc exchange control means (15) to the disc exchange drive circuit. (9). Therefore, the CD that has been played until now is returned to a predetermined storage position in the storage section by the disk exchange mechanism (9), and the CD with the disc number is pulled out from the storage section and transported to the playback position. Then, C of the disk number
Playback of D is started, and a search for a desired song is performed.

Therefore, by repeating the above-described operations, all songs are played according to the data stored in the playback disk number/track number memory (12).

Next, after specifying the song for program playback,
The block diagram of FIG. 1 will be explained in detail using the flowchart of FIG. 3 in case the user notices that the CD is not in the storage section and takes out the CD stored in the storage section.

To take out a CD stored in the storage compartment, press Eject C.
Operate the eject key (C) of the operation key (6>) in accordance with D. The eject keys (C) are provided as many as the number of CDs that can be stored in the storage section. Since the trays are provided according to the trays arranged, by operating the tray corresponding to the storage position where the CD to be taken out is stored, the desired tray can be moved to the disc loading/unloading position and the CD can be taken out. .Furthermore, when the eject key (C) is operated, the operated key is detected by the eject tray number detection means (17), and corresponding data is written into the erasing disk number register (18) (step ■). .

By the way, after the songs to be programmed to be played are specified, the data of the disk numbers and song numbers are stored in the playback disk number and song number memory (12) in the order of addresses in the specified order. When data is written to the playback disc number/track number memory (12), the maximum address detection means (2o
) for the playback disc number/track number memory (12)
It is detected whether data has been written up to several addresses, and a numerical value (maximum step) is set according to the address. Then, work step register (2
1) is a numerical value (work step) according to the maximum step
The settings will be traced (step ■). It should be noted that the end detection means (23) detects whether the maximum step set by the maximum address detection means (20) or the work step set in the work step register (21) is 10. There is (step ■).

The work step set in the work step register (21) sets the address of the data to be transferred from the playback disc number/track number memory (12> to the disc number register (16)). The data of the last specified disk number is transferred to (16) (step ■).The data transferred to the disk number register (16>) is transferred to the erasing disk number register (18) by the comparing means (19). First, the eject key that was operated (
The comparison means (19) compares the data of the disc number of the CD to be ejected according to C) with the data of the last designated disc number (step (2)). The comparing means (19) compares the two data, and when it is detected that the two data are equal, the comparing means (19) generates a match output, so that the data erasure control means (22) is activated. , current working step register (2
In accordance with the work step 1), the data in the playback disc number/track number memory (12) is erased (step ■).

In this case, the data that has been completely erased is sequentially transferred to the address where the data that was completely erased was stored to the next address, and
This is done so that the address where the erased data was stored does not become a blank area where no data has been stored. When the data in the playback disc number/track number memory (12) is erased by the data erasure control means (22), the data erasure control means (22) detects that data erasure has been completed, and The maximum step of the address detection means (20) is decreased by 1 (step ■). As a result, the maximum step and the playback disc number/track number memory (1
2) The maximum address values of the data stored in 2) match.

On the other hand, the comparison means (19) detects the disk number register (
16) and the data stored in the erased disk number register (18), and if it is detected that the two data are not equal, the comparing means (19) generates a match output. Since the data erasing control means (22) does not operate, no control is performed to erase the data in the playback disc number/track number memory (12>).

By the way, each time the comparison means (19) compares the data completely stored in the disk number register (16) and the data completely stored in the erased disk number register (18), it is determined whether the two data are equal, true, or unequal. Regardless, the work step register (21) is decremented by 1 (step ■). Therefore, from the playback disc number/track number memory (12) onward, the data stored at the address 1 smaller than the one on the disc is Transferred to number register (16). Then, the data is again used as a means of comparison (19)
This will be compared with the data stored in the erased disk number register (18).

Therefore, until the completion detecting means (23) detects that the work step in the work step register (21) has become 10'', steps 1 to 2 shown in FIG. Register (18
) The disc number data of the ejected CD stored in the playback disc number/track number memory (12) can be compared with the disc number data of all the data stored in the memory (12), and each time the two data match, the corresponding Since the data stored in the playback disc number/track number memory (12) is erased, the data stored in the playback disc number/track number memory (12) is deleted.
2) Among the data stored in the ejected C
All data having the same disc number as D will be erased from the playback disc number/track number memory (12>). Therefore, when ejecting several CDs, press the eject key (6) of the operation keys (6) one after another. By operating C), the data having the same disc number as the CD ejected from the storage unit is sequentially erased from the playback disc number/track number memory (12). Program playback can be performed using just a CD.

Note that the end detection means (23) uses the work step register (
In addition to detecting that the work step of 21) has become r□, the maximum step of the maximum address detection means (20) is
0'' is detected, but the maximum step is r□
”, the playback disc number/track number memory (12)
This is when no data is stored and program playback is not performed.

(G) Effects of the Invention As described above, the present invention has the same recording medium number even after the designation of a song for program playback is completed, even when the storage medium is taken out from the storage section. The data will be erased from the memory where the recording medium number and song number corresponding to the specified song are stored, so you can reprogram the specified song by program playback other than the song recorded on the removed recording medium. can be played,
This has the advantage of improving operability when replacing the recording medium stored in the storage section.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a control system of an autochanger device for a CD player, and FIG. 3 is a flow chart for explaining FIG. Explanation of main figure numbers (6)...Operation keys, (10)...Disc number/track number manual control means, (11)...Memory switch,
(12)...Memory for playback disc number/track number, (
16)...Disk number register, (17)...Eject tray number detection means, (18)...Erase disk number register, (19)...Comparison means, (
22)...Data erasure control means.

Claims (1)

[Claims] (1) A plurality of recording media on which information such as music is recorded is stored in a storage unit, and the recording medium to be played can be automatically replaced, and the recording medium number and recording are set according to the storage position of the storage unit. In an autochanger device with a program selection function that allows playback in the specified order by arbitrarily specifying the song number set according to the order recorded on the medium, the recording medium number and the number specified at the time of program selection are used. A memory in which song numbers are stored in the specified order as a set of data, a detection means for detecting a recording medium number corresponding to a recording medium taken out from a storage section, and a recording medium number detected by the detection means. and a recording medium number of data stored at each address of the memory, and the comparing means has a recording medium number in the memory that is the same as the recording medium number detected by the detecting means. an autochanger device comprising a data erasure control means for erasing data when data is detected, and erasing from the memory only data having a recording medium number corresponding to the recording medium taken out from the storage section. program music selection control device.