JPH10241342A - Disk music selection unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the selecting of a music to be performed quickly with only sound information without by screen information as to a CD(compact disk) music selection unit. SOLUTION: This unit is constituted so as to select and reproduce a desired disk from plural disks D1 , D2 , D3 ,... housed in a mechanical changer. In this case, the unit is made so as to be suitable to the case a user forgets the name and the text of a music and he remembers the molody of the music uncertainly and so as to retrieve the music easily and quickly with only the sound information without by screen displays by reducing information in order to reduce a storage memory while passing the linear PCM signal demodulated by a musical data reproducing part 2 through a time compressing part 3, a low-pass filter 4 and a musical signal compressing part 6 for thinning prescribed information and by producing the abstract list of musics of the plural disks D1 , D2 , D3 ,... in a memory circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc selecting apparatus having a disc changer mechanism, and more particularly to an apparatus capable of quickly selecting a desired song.

[0002]

2. Description of the Related Art Conventionally, there has been a demand for a disc changer capable of retrieving the contents of music recorded on a plurality of disks in a short time and reproducing a desired music. A format has been proposed in which index information is manually entered or index information is written on a normal disk.

This method is time-consuming in the case of the former method, and is provided on a so-called menu screen in the case of the latter method, and sounds such as melody are memorized. If you don't remember, it was difficult to search. In addition, miniaturization of the circuit scale has been desired in providing the apparatus.

Accordingly, the present invention is intended to solve the above-mentioned problems and to provide a device which can quickly select a tune only based on sound information such as melody and further downsize the circuit.

[0005]

The present invention, in order to solve the above problems, comprises the following 1) to 3).
That is, 1) a disk storage section for storing a plurality of disks, pull-out means for pulling out one disk from the plurality of disks and mounting the disk at a predetermined playing position, and playing back the mounted disk. And a read-out unit for reproducing a signal from the rotationally driven disk, and a demodulation unit for demodulating a modulation signal reproduced by the head unit. A disc selecting device having a disc changer mechanism for selecting and reproducing a desired disc from a plurality of discs, a sound information compressing means for thinning out predetermined information from a linear demodulated signal output from the demodulating means, And a storage means provided to supply the linear demodulated signal and the linear demodulated signal. Control means for selectively supplying the compressed signal and the linear demodulated signal to the storage means,
A disk selecting device, wherein the control means stores a part of the music recorded on the plurality of disks in the storage means in accordance with the selectively switched signal form.

2) A disk selecting apparatus according to claim 1, wherein a time axis compression means for compressing a time axis of the linear demodulated signal is provided upstream of the compression means, and a band is obtained from the time axis compressed signal or the linear demodulated signal. 2. A disc music selecting apparatus, comprising: at least one of filter means for restricting, and the control means performing ON / OFF operation of the provided means.

3) The disk selecting apparatus according to claim 1 or 2, wherein the control means sets a storage location in the music to be stored in the storage means by at least one of the following (1) to (6). A disc music selection device characterized by being made possible. (1) The location from the beginning of the music to the lapse of a predetermined time (2) The location from the time when a predetermined time has elapsed from the beginning of the music to the lapse of a predetermined time (3) The desired location specified by the operator (4) Each preset Multiple locations in the song (5) Locations different from the location stored last time (6) Selected locations (1) to (4) for each song

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram of a disc music selection apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a mechanical changer unit which accommodates a plurality of compact discs (hereinafter, simply referred to as CDs) D1, D2, D3,... This is a well-known component including a rotary drive unit for reproducing a CD, a CD reproducing mechanism unit 1a including an optical pickup (head means) for extracting a signal, and the like.

Reference numeral 2 denotes a music data reproducing unit for demodulating the EFM modulated signal reproduced from the CD by the CD reproducing unit 1a and outputting the demodulated signal as a linear PCM signal. On the output side, switches SW1 and SW2 and a time compressing unit are provided. 3 and the microcomputer control unit 5 are connected to each other. The time compression section 3 is a circuit for compressing the linear PCM signal on the time axis to increase the pitch. The ON / OFF operation is controlled by the microcomputer control section 5. On the output side, a low-pass filter (LPF) 4 is provided to limit the audio frequency and reduce the memory capacity at the subsequent stage. Is controlled.

Reference numeral 6 denotes an audio signal compression unit, which is a circuit for thinning out the signal information so that the contents of the music can be understood at the time of reproduction and performing compression, and which is provided in consideration of the memory capacity as described above. is there. SW1 is a switch circuit for selecting a compressed signal output from this circuit and a linear PCM signal coming from one side, and 7 is a memory circuit for storing those selected and incoming audio signals. Yes, for example, SRAM, nonvolatile flash memory, or
It is composed of a memory card and the like.

Reference numeral 8 denotes an audio signal demodulation unit, which is a circuit for expanding the signal that has been time-axis compressed by the time compression unit 3 and demodulating it into a linear PCM signal. SW2 is a switch for selecting a linear PCM signal coming directly from the audio data reproducing unit and a signal coming from the audio signal demodulating unit 7;
Reference numeral 9 provided at the last stage is a digital / analog conversion circuit for converting a digital signal into an analog signal.

The microcomputer control circuit 5 controls the ON / OFF operation of the time compression unit 3 and the LPF 4,
1, SW2 switching control, control of the mechanical system and servo system of the mechanical changer unit 1, address control of writing / reading of the memory 7, and a ROM (not shown) for executing a program described later, which is a main configuration of the present invention. Etc. are stored in the system control unit. Reference numeral 10 denotes an operation panel for performing input instructions such as reproduction operation and creation of a list of sounds of CD music, and reference numeral 11 denotes a display unit for displaying a mode corresponding to the operation. The disk music selection apparatus of the present invention has a configuration as roughly described above.

Next, an embodiment of the present invention will be described in more detail with reference to FIG. FIG. 2 is a flowchart executed by a program stored in the ROM of the microcomputer control unit 5 (step S1).
5).

First, when the power is turned on and the operation panel 10 selects, for example, a normal reproduction mode, a check is made in step S1 as to whether the reproduction mode is the normal reproduction mode or the audio catalog mode, and it is determined that the reproduction mode is the normal reproduction mode. Then, the microcomputer 2 switches SW2 to the terminal a side, and the music in the selected disk is output as a linear PCM signal.

On the other hand, when the voice catalog creation mode is selected, it is determined in step 2 that the mode is the mode, and the process proceeds to step S3. Step 3
Is a step of executing a selection mode for determining which part of a song is stored in the memory circuit 7. The request for the selection mode is made by the display unit 11, and the following six modes are displayed.

(1) A few seconds (for example, 4 seconds) from the beginning of the music
Up to. (2) A part from one minute after the beginning of the song to a few seconds (from the end of the intro to a few seconds). (3) A few seconds of the location selected by pressing the operation button by the user while listening. (4) Predetermined several places in the middle of the music. (5) A location different from the previously stored location (if the previously stored location is once reproduced in the menu, the next menu creation is set so that locations different from that location are sequentially stored). (6) The points (1) to (4) can be selected for each song.

After the above-mentioned mode selection setting is made, next step S4 is a step of selecting and setting what kind of signal form is to be recorded in the memory circuit 7 at the selected location. The following four selection modes are displayed on the display unit 11.

(1) The original linear PCM is recorded with emphasis on sound quality. (2) Compress and record audio information. (3) After narrowing the frequency band, the audio information is compressed and recorded. (4) After the pitch is raised by compressing the time axis, the frequency band is narrowed and the voice information is compressed and recorded.

When each of the above modes is set, the microcomputer control unit 5 sets the time compression unit 3 according to the set mode.
Then, the operation control of the LPF 4, the switching control of SW1 and SW2, and the control of the mechanical changer unit 1 are performed.

Next, in step S5, the first disc is taken out by the mechanical changer unit 1 to create an inventory, and the first song is reproduced, and a portion corresponding to the above setting mode is selected and set. Is stored in the memory 7 in accordance with the signal form. The list of the songs on this disc is stored in the mechanical changer unit 1 by repeating the same operation sequentially from the next song to the last song, and from the next disc to the last song on the last disc. A list of the sounds of all the discs is created (steps S7, S7).
8).

For example, in steps S3 and S4 described above, "(1) a place from the beginning of a music to a few seconds (for example, 4 seconds)" is selected and set as a recording place for creating a sound catalogue, and the signal of that signal is set. Assuming that “(1) Recording with the original linear PCM with emphasis on sound quality” is selected and set as the signal storage mode in the memory circuit 7, SW1 is connected to the terminal a.
SW2 is switched to the terminal a side.

Thus, under the control of the microcomputer control unit 5 in the mechanical changer unit 1, for example, the disk D1 stored at the top of the storage unit is pulled out, and the CD reproduction unit 1
a, a selected and set portion is reproduced for a few seconds, and the reproduced EFM modulated signal is demodulated into a linear PCM signal by the audio data reproducing section 2 and is transferred to a predetermined address of the memory circuit 7 via SW1. Will be recorded. This operation is sequentially repeated from the music in the first disc to the last music of the disc stored in the lowermost stage, thereby creating a list of sounds of the music in all the discs.
Further, the sound of the music being created in the catalog is converted into an analog signal by the D / A converter 9 via the SW2, and can be monitored from a speaker (not shown).

As another selection mode, "(2) a portion from one minute after the beginning of the music to a few seconds" is selected and set as a recording location, and the signal is stored in the memory 6. When “(3) narrowing the frequency band and compressing and recording audio information” is selected and set,
This time, while SW1 is switched to the terminal b, SW2
Is switched to the terminal a side in the same manner as described above. At the same time, the time compression unit 3 is turned off, and the LPF is turned on.

As a result, in the same manner as in the above-described operation, a portion in the music corresponding to the selected mode of the first music of the first disk of the uppermost stage is reproduced, and one side thereof is switched to SW2 in the same manner as described above.
Via a speaker (not shown) for monitoring, and the other side is used for creating a sound inventory.
The signal is supplied to the LPF 4 via the non-operating time compression unit 3, where a predetermined band is limited. Further, the band-limited signal is information-compressed by the music signal compression section 6 at the next stage to the extent that the contents of the music can be understood, and is stored at a predetermined address of the memory circuit 7 via SW1. In this place,
After the linear PCM signal is band-limited, the information is further compressed, and the storage capacity of the memory circuit 7 can be reduced.

Further, for example, “(5) a location different from the location previously stored” is selected and set as a recording location, and “(4) time axis compression is performed” as a signal storage form of the signal in the memory circuit 7. After the pitch is raised, the frequency band is narrowed and the audio information is compressed and recorded. "
The microcomputer control unit 5 detects the number of reproductions of the catalog created in this mode, and sets a recording location corresponding to the number of reproductions. In this mode, for example, once a location in the inventory created in this mode is played once, when creating the next inventory, the storage location is stored in accordance with the number of times of inventory playback so that the data at the same location is not stored. This mode is set in advance so as to be shifted by several seconds. Also in this case, while SW1 is switched to the terminal b side,
W2 is switched to the terminal a. At the same time, the time compression unit 3 and the LPF 4 are turned on.

As a result, one of the linear PCM signals during the creation of the inventory is monitored and output via the switch SW2, and the other signal is supplied to the time compressing unit 3 to shorten the time axis and increase the pitch. After a predetermined band is limited by the LPF 4 in the next stage, predetermined information is thinned out in the music signal compression unit 6 and the audio is compressed. Then, the signal from which the information has been reduced is recorded at a predetermined address of the memory circuit 7 via SW1. Therefore, in this mode, the storage capacity of the memory circuit 7 can be further reduced as compared with the above-described mode.

Then, in order to search a desired music piece by reproducing the sound list from the sound list created as described above, the sound list reproduction mode is selected.
When this mode is selected, the microcomputer control unit 5 switches SW2
Is switched to the terminal b side (step S9).

Then, the microcomputer control section 5 reads out the catalog information of the first piece of music stored at a predetermined address of the memory 7 and supplies the information to the audio signal demodulating section 8. If the storage form of the read signal is a time axis compressed signal, the audio signal demodulation section 8 expands the time axis to make the signal form audible and starts reproducing the music information of the list via SW2. (Step S10).

If the tune is the tune that the user is looking for during reproduction of the list of sounds, or if the user wants to reproduce the contents for a longer time to check the contents, for example, the play button of the tune number is operated. As a result, the well-known mechanism of the changer mechanism is operated, the corresponding CD is pulled out, mounted on the reproduction position and the reproduction operation is started, and the switch SW2 is switched to the terminal a side. (Steps S11 and S1).
2).

The search for the catalog information of the desired music is controlled so that the search is continued until the catalog information of the last music on the last disk is found until the desired music is found or a stop operation is performed. (Steps S13 and S14).

As described above, according to the apparatus of the present embodiment,
Since the catalog can be reproduced by sound regardless of the screen display, it is suitable when the user forgets the name and lyrics of the music and learns the melody, and the search can be performed easily and quickly. Also, in creating a sound inventory, various creation modes are possible according to a user's request.
The signal form supplied to the memory is also a form considering the recording capacity, and the circuit size can be reduced.

In the embodiment described above, each of the above-described components may be incorporated as an integrated device, and the mechanical changer unit 1 serving as a main body may include a time compression unit 3 and an LPF.
4 and an audio signal compression unit 6, and a music signal demodulation unit 8 and a memory 7 incorporated in an external remote control unit separate from this, and communicate with each other by wire or optical communication with each other. The same operation as the example may be performed. Also, the memory 7 is configured to be detachable such as a card, and recorded in the changer unit 1 in advance,
This may be attached later. In addition, when reproducing the content stored in the memory, a configuration may be adopted in which the content can be listened to using the headphones or the like from the operation unit of the external remote control unit.

[0033]

According to the first aspect of the present invention, since it is possible to reproduce a list by sound without depending on the screen display, it is suitable for a case where the user forgets the name and lyrics of the music and learns the melody. Makes searching easy and quick. Further, the circuit size can be reduced. In particular, according to the second aspect of the invention, since the time axis compression means or the filter means is provided, the storage capacity of the storage means can be reduced, and the circuit size can be further reduced. In particular, according to the second aspect of the invention, in creating a sound list, various creation modes are possible, and it is possible to provide a user with a device that meets the demand.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a disc music selection apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the disc music selection apparatus according to the embodiment of the present application.

[Explanation of symbols]

 Reference Signs List 1 mechanical changer section 1a CD playback mechanism section 2 music data playback section 3 time compression section 4 low-pass filter (LPF) 5 microcomputer control section 6 audio signal compression section 7 in memory circuit 8 audio signal demodulation section 9 digital / analog converter 10 operation Panel 11 Display D1, D2, D3 Compact Disc (CD)

Claims (3)

[Claims] 1. A disk storage section for storing a plurality of disks, a pull-out means for pulling out one disk from the plurality of disks and mounting the disk at a predetermined playing position, and reproducing the mounted disk. A rotating drive means for rotating the disk, a reading means for reproducing a signal from the rotationally driven disk, and a demodulating means for demodulating a modulated signal reproduced by the head means. A disc selecting device having a disc changer mechanism for selecting and reproducing a desired disc from a plurality of discs, wherein sound information compressing means for thinning out predetermined information from a linear demodulated signal output from the demodulating means; A storage unit provided to supply a signal and the linear demodulated signal; and a storage unit provided from the sound information compression unit. Control means for selectively supplying the compressed signal and the linear demodulated signal to the storage means, and the control means selectively switches a part of the music recorded on the plurality of disks. A music selection device, wherein said storage means is stored in said storage means in accordance with a signal form obtained. 2. A disk selecting apparatus according to claim 1, wherein a time axis compressing means for compressing a time axis of the linear demodulated signal is provided at a stage preceding the compressing means, and a band is obtained from the time axis compressed signal or the linear demodulated signal. 2. A disc music selecting apparatus, comprising: at least one of filter means for restricting, and the control means performing ON / OFF operation of the provided means. 3. The disk music selecting apparatus according to claim 1, wherein the control means sets a storage location in the music to be stored in the storage means by at least one of the following (1) to (6). A disc music selection device characterized by being made possible. (1) The location from the beginning of the music to the lapse of a predetermined time (2) The location from the time when a predetermined time has elapsed from the beginning of the music to the lapse of a predetermined time (3) The desired location specified by the operator (4) Each preset Multiple locations in the song (5) Locations different from the location stored last time (6) Selected locations (1) to (4) for each song