JP2000195237A - Disk reproducing device, method therefor, and recording medium recorded with disk reproducing software - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately select music of a digital disk, such as CD and MD without viewing a display. SOLUTION: When a 'track-down' key 21 is operated, a down control part 31 first selects the just preceding music, when it operates for preparation. When the down control part 31 is not operating for preparation it checks whether or not a timer 34 is operating, namely, whether or not it is within two seconds from the previous selecting operation, and when the timer 34 is operating, preceding music is selected similarly to during accessing. When the timer 34 is stopped, the present music is selected. In any case, the timer 34 for measuring an elapsed time after a music selecting operation is reset to be activated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a technique for reproducing a disc such as an MD, and more specifically, to accurately select music on a digital disc such as a CD or MD without looking at a display. It is possible to do it.

[0002]

2. Description of the Related Art In recent years, with the development of electronic technology, a digital disk (DISC) such as a CD (compact disk) and an MD (mini disk), and a disk reproducing apparatus (for reproducing music and the like recorded on these disks). Players) are becoming popular. In such a digital disc, a plurality of songs (also referred to as tracks) are recorded on one disc, and random access for playing back in a desired song order is possible. Can be selected by a key operation of the player.

As the selection of such a song, the following cases can be considered from the viewpoint of the current song. 1. Select the next song 2. Listen to the current song again. On the other hand, this type of in-vehicle player such as a car audio system has a limited number of keys because the size of the operation panel is limited. Therefore, by assigning and switching two functions for one of the two keys such as the track up key and the track down key, the selection of the three kinds of music as described above can be performed in the following three ways.
Must be performed as a type of operation. 1. The next song is selected by operating the track up key. 2. Select the current song by operating the track down key. 3. The previous song is selected by operating the track down key.

In the case where the track down key has two functions, that is, selection of a current song and selection of a previous song, it is necessary to switch between these functions. Has switched the function of the track down key based on how many minutes and seconds from the beginning of the currently playing or stopped song (referred to as relative time). Note that in any of the above three operations, the relative time of the newly selected song is 0.
Performance starts from minute 0 second.

FIG. 8 is a conceptual diagram showing an example of the relationship between the relative time and the function of the track down key in the above-described conventional technology. Is an index (INDEX) area.

That is, in this example, when the track is down or operated at a position (range B1) from the beginning of a certain nth tune to less than 0 minute 1 second including the index area, the currently playing is performed by operating the track down key. The (n−1) -th song immediately before the n-th song is selected. On the other hand, if the player is playing or stopping at a position (range B2) of 0 minutes 1 second or more, the n-th song, which is the current song, is selected again even if the same track down key is operated. The performance is started from 0 minutes and 0 seconds of the selected tune.

FIG. 9 is a flowchart showing an example of a procedure for performing the above-described processing when the track down key is operated in the prior art. That is, in this procedure, when the track down key is operated, it is checked whether or not the relative time of the current song is less than 0 minutes and 1 second (step 91). Selection is made (step 92), but if the time is less than 0 minutes and 1 second, the immediately preceding music is selected (step 93). The relative time serving as a reference for switching the function of the track down key is displayed on the display of the player as position information indicating the reproduction position together with the current song number.

[0008]

However, in the above-mentioned prior art, the function of the track down key is switched according to the relative time, and the operator must look at the display to confirm the relative time. Therefore, if the track down key is operated without looking at the display, the function expected by the user may differ from the function that actually works.
It was difficult to operate accurately.

The present invention has been proposed to solve the above-mentioned problems of the prior art.
It is an object of the present invention to provide a disk reproducing technique that can accurately select a digital disk such as D or MD without looking at a display. Another object of the present invention is to provide a disk playback technique for realizing an excellent user interface. It is another object of the present invention to provide a disk playback technique for easily handling a plurality of disks.

[0010]

In order to achieve the above-mentioned object, a first aspect of the present invention is a disk reproducing apparatus for reproducing a track recorded on a disk, wherein a reproducing position is set to a current track or its current position. A first switch for returning to a previous track, a second switch for advancing a reproduction position from a current track to a next track, and
Measuring means for measuring a predetermined time after at least one of the switch or the second switch has been operated, and when the first switch is operated within the predetermined time. Control means configured to return the playback position from the current track to a previous track;
It is characterized by having. According to a sixth aspect of the present invention, the invention of the first aspect is viewed from the viewpoint of a method. In a disk reproducing method for reproducing a track recorded on a disk, a reproduction position is set to a current track or a track before the current track. A measuring step for measuring a predetermined time after at least one of a first operation for returning or a second operation for advancing the reproduction position from the current track to the next track is given; And a control step for returning a reproduction position from a current track to a previous track when the first operation is given within the predetermined time. According to a ninth aspect of the present invention, the inventions of the first and sixth aspects are viewed from the viewpoint of a recording medium on which computer software is recorded, and a disk reproduction for reproducing a track recorded on a disk using a computer. Software, the software instructs the computer to perform a first operation for returning the playback position to the current track or the previous track or to advance the playback position from the current track to the next track. A predetermined time is measured after at least one of the second operations is given, and when the first operation is given within the predetermined time, the reproduction position is changed from the current track. It is characterized by returning to the previous track. According to the first, sixth, and ninth aspects of the present invention, the function that operates when the first switch such as the track down key is operated is switched based on the elapsed time from the previous operation on the first or second switch. More specifically, if within a certain period of time from the previous operation, the track returns to the previous track, that is, the song, and after a certain period of time, the currently playing song is selected again. For this reason, whether to return to the previous song or to the beginning of the current song by the operation can be easily determined based on the time interval of the switch operation, without having to confirm the relative time from the beginning of the song on a display or the like, It is possible to select a song accurately. If the starting point of the certain time is limited to only the operation of the first switch such as the track down key, the operation of the first switch after the other operation will select the same music as the current one again. This may result in a potential invalidation. On the other hand, according to the present invention, a certain period of time is counted from other operations for selecting a song, and within that time, the music is returned to the immediately preceding song, so that the first operation immediately after such another operation is performed. Can be avoided.

According to a second aspect of the present invention, in the disk reproducing apparatus according to the first aspect, a third switch for selecting one from a plurality of disks is provided, and the measuring means is provided with the first, second, or third switch. The system is characterized in that the predetermined time is measured after at least one of the third switches is operated. The invention of claim 7 is
The invention of claim 2 is taken from the viewpoint of a method,
7. The disk reproducing method according to claim 6, wherein the measuring step is performed after at least one of the first operation, the second operation, or a third operation for selecting one from a plurality of disks is given. And measuring the predetermined time. In the invention of claims 2 and 7,
Even after a new disk is selected by the third switch, if the first switch is operated within a certain period of time, the music returns to the previous song. In this way, the criteria for switching functions are
By unifying the time interval from the operation related to selection, a consistent and easy-to-understand user interface is realized. Such an easy-to-understand user interface is particularly useful in a setting in which the last song is cyclically selected when returning to the previous song from the first song on the disc. The disc selected from the plurality is, for example, pulled out from a disc magazine and transported to a disc reproducing mechanism.

According to a third aspect of the present invention, in the disk reproducing apparatus according to the second aspect, an arbitrary one of a plurality of disks is selected according to an operation given by the third switch.
And means for selecting one of them. According to the third aspect of the present invention, an arbitrary one of a plurality of disks can be selected at random by the third switch, so that the degree of freedom of disk selection is improved.

According to a fourth aspect of the present invention, in the disk reproducing apparatus according to the second or third aspect, a disk currently selected from the plurality of disks ordered in advance according to an operation given by the third switch. Means for selecting the next disk or the previous disk. In the invention according to claim 4, when a disk is selected from among a plurality of disks by the third switch,
The next disk and the previous disk can be easily selected according to a predetermined order. For this reason, for example, a disc different from the present one can be easily enjoyed without being lost depending on the storage of which disc is in the disc magazine.

According to a fifth aspect of the present invention, in the disk reproducing apparatus according to any one of the first to fourth aspects, the control means controls the first switch during a predetermined preparation operation for a current track. Is operated so that the playback position is returned from the current track to the previous track when is operated. The invention of claim 8 is the invention of claim 5
The invention of claim 1 is taken from the viewpoint of a method.
Or the disk reproducing method according to 7, wherein the control step returns the reproduction position from the current track to the previous track when the first operation is given during a predetermined preparation operation for the current track. It is characterized by the following. According to the fifth and eighth aspects of the present invention, if a predetermined preparation operation is being performed, such as during a seek operation of the pickup, even if a certain period of time has passed since the previous operation, the first switch can be used to set one.
You can return to the previous song. That is, when the first switch is operated as early as possible during the preparation operation for reproducing a certain current song, the user often wants to listen to the song immediately before the current one. By operating the function of returning to the previous song, a user interface that is easy to use according to the user's intention is realized. Also, if the first switch is operated during the preparation operation as described above, if the same music as the current one is selected again, the preparation operation for the same music is repeated, and the operation becomes virtually invalid. The possibility arises. On the other hand, in the present invention, the first operation is performed during the preparation operation.
By unconditionally returning to the previous song when the switch is operated, the operation can be prevented from being wasted.

[0015]

Embodiments of the present invention (hereinafter referred to as "embodiments") will be described below with reference to the drawings. In order to realize the present invention and the embodiment, it is generally considered that software including a program code and data controls a computer and its surrounding circuits and devices.

Such software is created by combining instructions according to the description of the present specification, and the parts common to the above-described prior art employ the technique described in the prior art. And the software is CPU
The functions and effects of the present invention are realized by utilizing physical resources such as a storage device such as a peripheral device, an input / output device, and a memory, and a disk reproducing mechanism.

However, various forms and configurations can be considered for software and hardware, and a part of the functions of the present invention can be realized by a physical electronic circuit such as an LSI. For this reason, the present invention and the embodiments will be described below using virtual circuit blocks that realize individual functions included in the present invention and the embodiments.

[1. Configuration] The present embodiment is a car audio system (referred to as "the present system") for reproducing tracks (songs) recorded on a digital disc (referred to as a "disc") such as a CD or MD. If the track down key is pressed within a predetermined period of time or during a predetermined preparation operation after the key operation for the key, the previous song is returned.

FIG. 1 is a functional block diagram showing the configuration of the present system. That is, in the first embodiment, the display 1, the track down key 21, the track up key 22, the disc selection key 23, the CD-IC 4,
Pickup 5, speaker 6, amplifier 7, D / A
A converter 8 and a microcomputer 3 are provided.

Here, although this system is not shown,
A so-called autochanger for storing a plurality of discs in a magazine in advance and automatically loading a selected disc into a disc reproducing mechanism is provided. The pickup 5 shown in FIG. 1 is representative of an autochanger including such a disc reproducing mechanism. It is expressed as

The CD-IC 4 controls an autochanger typified by the pickup 5 and includes position information such as a subcode, that is, a song number and a relative time among digital data read from the disk by the pickup 5. The management data is transmitted to the microcomputer 3, and the music signal representing the sound is transmitted to the D / A
This is means for performing processing for transmitting to the converter 8.

The microcomputer 3 has a key 2
These are means for controlling each part of the present system including the CD-IC 4 in accordance with various operations given from input devices 1, 22, 23 and other input devices (not shown). The microcomputer 3 is configured to control the CD-IC 4 by transmitting information such as a performance command based on such various operations.

In the above-described autochanger represented by the pickup 5, based on such control,
Operations such as reading digital data from a disc such as a CD or MD via the pickup 5 and selecting a disc or a track are performed.

The display 1 is a portion for displaying information such as the total number of songs on the disc, the total playing time and title, the number of tracks (songs), the title and relative time, and the like. LCD). The microcomputer 3 has a CD-I
The display unit 1 is configured to display position information such as a song number and a relative time transmitted from C4.

The D / A converter 8 is a means for converting a music signal representing sound out of digital data read from the disk by the pickup 5 into an analog signal, and the amplifier 7 converts this analog signal. This is means for outputting from the speaker 6 by amplifying.

The track down key 21 is a first switch for returning the reproduction position to the current track or the beginning of the previous track.
Is a second switch for moving the playback position from the current track to the beginning of the next track. The disk selection key 23 is a third switch for selecting one from a plurality of disks stored in the disk magazine.

The microcomputer 3 operates a down control unit 31, an up control unit 32, and a disk selection unit 3 by the operation of software (not shown) as described above.
3 and a timer 34. The up control section 32 controls the CD-IC 4 when the track up key 22 is pressed, thereby moving the reproduction position from the current track to the next track.

The down control section 31 is a section for controlling the CD-IC 4 when the track down key 21 is pressed, thereby returning the reproduction position to the current track or the previous track. The disk selection unit 33 is a part for selecting one from a plurality of disks stored in the disk magazine by controlling the CD-IC 4 in accordance with an operation given from the disk selection key 23. .

The timer 34 has keys 21, 22, 2
3 is a measuring means for measuring a predetermined time after at least one of the three has been operated. Specifically, the operation starts when such an operation is performed, and stops after two seconds. It is configured. For this reason, if it is determined whether the timer 34 is operating, the keys 21, 22, 2
It is possible to easily determine whether or not a predetermined time has elapsed after at least one of the three has been operated.

The down control unit 31 operates the track down key 2 during a predetermined time measured by the timer 34 or during a predetermined preparation operation for the current track.
When 1 is operated, the playback position is returned from the current track to the previous track. In addition, when the track down key 21 is operated during the above-mentioned time or other than during the preparation operation,
The current track is selected again as the playback position. The down control unit 31 thus configured
Is equivalent to the control means of the present invention.

When selecting one of a plurality of disks in accordance with an operation given by the disk selection key 23, the disk selecting section 33 selects an arbitrary one of the plurality of disks and sets the order in advance. And selecting the next disk or the previous disk of the currently selected disk from the plurality of such disks.

[2. Operation] The present embodiment configured as described above operates as follows. [2-1. Outline of Operation] In the present embodiment, the function of the track down key 21 is switched based on the elapsed time from the last operation related to music selection (referred to as music selection operation) and whether or not a predetermined preparation operation is being performed. Is performed. Here, examples of the music selection operation include an operation of the track down key 21, an operation of the track up key 22, and an operation of the disc selection key 23. Also, the “preparation operation” means that the seek of the pickup or the TOC (Table Of C
ontents) or stopped during a search operation such as reading, etc.
It expresses.

That is, when the track down key 21 is operated, during the access, the immediately preceding music currently being played is selected regardless of the elapsed time from the immediately preceding music selection operation. In addition, even when the music is not being accessed and within a certain period of time from the immediately preceding music selection operation, the immediately preceding music is selected. If a certain time has passed since the last music selection operation except during access, the music currently being played is selected again.

When the track up key 22 is operated, the tune immediately after the current one is always selected regardless of the above conditions. In any case, the performance of the song newly selected in this way is started from the position of the relative time of 0 minute 0 second of the song, and at the same time, the measurement of the fixed time from the song selection operation is newly started, The fixed time measured in this manner is used as a function switching reference when the track down key 21 is operated next time.

FIG. 2 shows, as a specific example, the relationship between the elapsed time from when the track down key 21 is operated to when the track down key 21 is operated again and the function that works as a result of the operation. FIG. In this figure, a time zone of 2 seconds after the music selection operation is called a range A1,
Other time zones are referred to as range A2. Further, "n" in this figure indicates a music piece performed at the time when the music selection operation is performed.

That is, in this example, it is assumed that the track down key 21 is operated, for example, when the user has heard the performance for a while, and this operation is referred to as a first track down key operation or a first operation. At this point, if two seconds or more have passed since the last music selection operation before that, the range A2
As a result of the first operation, the n-th song, which is the current song, is selected again, and the performance is started from the beginning.

At the same time, the range A1 is set for two seconds from the time when the first operation is performed, and the second track down key operation (referred to as the second operation) is performed within two seconds after the first operation. In this case, the (n-1) th tune, which is the tune immediately before the tune currently being played, is selected. On the other hand, the time zone in which two seconds or more have elapsed since the first operation is again the range A2, and when the track down key 21 is operated two seconds after the first operation, the music being played at that time is again performed. Selected.

When the track up key 22 or the disc select key 23 is pressed instead of the first track down key operation, the operation result differs from that of FIG. 2 according to the type of operation. The selection of the next tune or the selection of the disc is performed, but the result when the track down key 21 is operated within two seconds thereafter is the same as the above example. Although not shown, in the case where the operation of the track down key 21 is performed during the access, the music immediately preceding the currently playing music is selected regardless of the elapsed time from the immediately preceding music selection operation. .

For example, if the track up key 22 is operated during reproduction of the second music, a search operation for the third music is performed and the track is being accessed, and the track down key 2 is accessed during this access or within 2 seconds after the operation of the track up key 22.
When the operation 1 is performed, the process returns to the second song.

[2-2. Processing procedure when track down key is operated] Next, an example of a processing procedure executed when the track down key 21 is operated in the present embodiment is shown in the flowchart of FIG. That is, when the track down key 21 is operated (STAR in FIG. 3)
T), the down control unit 31 first determines whether or not access is being made (step 31). If access is being made, the down control unit 31 selects the previous song (step 34).

If it is determined in step 31 that no access is being made, the down control unit 31 checks whether the timer 34 is operating, that is, whether it is within two seconds from the last music selection operation (step 32). If it is in the middle, the previous music is selected as in the case of the access (step 34).

On the other hand, if the timer 34 is stopped, the current song is selected (step 33). In any of these cases, the timer 34 for measuring the elapsed time from the music selection operation is reset and activated (step 35). That is, in step 35, even if the timer 34 is already operating and two seconds have not yet elapsed, the timer 34 is reset and restarted, so if the track down key 21 is repeatedly pressed at an interval shorter than two seconds, Even if two seconds or more have passed since the first press, the user can return to the previous song one by one.

[2-3. Processing procedure when track up key is operated] In addition, when the track up key 22 is operated, the up control unit 32 selects the next song after the current one as illustrated in the flowchart of FIG. Then, the timer 34 is reset and activated (step 42).

Similarly, when the disk selection key 23 is operated, the disk selection unit 33 performs a disk selection process and resets and starts the timer 34. In this way, by resetting and starting the timer 34 at any music selection operation, 2 timers can be started from any music selection operation.
By using the track down key 21 within a second, a consistent user interface is realized in which the user can return to the music immediately before the current one.

When one of a plurality of disks is selected by the disk selection key 23, the disk selection unit 3
By the operation of 3, any one of the plurality of disks can be directly designated and selected, or the next disk of the currently selected disk can be selected from the plurality of pre-ordered disks. Alternatively, the previous disc can be selected. Either of these two aspects may be employed, or the two aspects may be switched and used.

[2-4. Operation procedure of timer]
The function of the timer 34 started according to the procedure illustrated in FIG. 4 or the procedure illustrated in FIG. 4 can be realized, for example, by repeatedly executing the operation procedure illustrated in FIG. In other words, this procedure is repeatedly executed at a constant cycle, but performs different processing depending on whether the timer is operating or not.

More specifically, it is first determined whether or not the timer is operating (step 51). If the timer is stopped, the process is terminated. If the timer is operating, a predetermined time has elapsed since the timer was started. (Step 5)
2) If the fixed time has not elapsed, the processing is terminated as it is, but if the fixed time has elapsed, the timer is stopped. Whether the timer is operating or stopped can be represented by, for example, a predetermined flag or the like.

[3. Effects] As described above, in the first embodiment, the function that operates when the track down key 21 is operated is switched based on the elapsed time from the previous music selection operation using the keys 21, 22, and 23. In other words, if within 2 seconds from the previous music selection operation, the track returns to the previous track or music, and after 2 seconds, the music currently being played is selected again.
Therefore, whether to return to the previous song or to the beginning of the current song by operating the track down key 21 can be easily determined based on the key operation time interval, and the relative time from the beginning of the song can be confirmed on a display or the like. Needless to say, it is possible to select a song accurately.

If the starting point for two seconds is limited to the operation of the track down key 21 only, the operation of the track down key 21 after the other operation is performed again by selecting the same music as the current one again. There is a possibility that it is effectively invalidated. On the other hand, in this embodiment, the time of 2 seconds is measured also from other operations for music selection, and if it is within 2 seconds, it returns to the previous music, and immediately after such other operations, It is possible to avoid a situation in which the operation of the track down key 21 is wasted.

In this embodiment, even after a new disk is selected by the disk selection key 23, if the track down key 21 is operated within two seconds, the music returns to the previous music. In this way, by unifying the criteria for switching functions to the time interval from the music selection operation, a consistent and easy-to-understand user interface is realized.

Here, in the present invention, one of the disks
For example, when the user tries to return to the immediately preceding music by the track down key 21 from the music, for example, as shown in FIG. Although a setting is possible, the user interface which is easy to understand as described above and which is realized by the present embodiment has a great benefit particularly in a case where the setting is returned.

That is, in such a setting, by repeatedly operating the track down key 21, the final song can be heard again after passing the first song of the disc. From the song
The operation of searching for a desired song is made more efficient. Note that the above-described cyclic setting can be performed for the track up key 22 as illustrated in FIG. 7, but it is also possible to freely use such a setting.

In the present embodiment, the disc selection key 23 and the disc selection section 33 are operated to randomly select any one of a plurality of discs, thereby improving the degree of freedom in disc selection. In the present embodiment, the disk selection key 23 and the disk selection unit 33
By allowing the user to freely select the next disk or the previous disk according to a predetermined order,
For example, it is possible to easily enjoy a disc different from the present one without being lost depending on the memory of which disc is in the disc magazine.

Further, in the present embodiment, the track can be returned to the immediately preceding music by the track down key 21 even if two seconds have passed since the last operation during access.
That is, if the track down key 21 is operated as early as possible while a certain current song is being accessed, another one is used.
In many cases, the user wants to listen to the previous song. In such a case, by using the function of returning to the previous song, a user-friendly user interface according to the user's intention is realized.

Further, if the track down key 21 is operated during the above-mentioned access and the same music as the current music is selected again, the access operation to the same music is repeated, and the operation is practically stopped. There is a possibility of invalidation. On the other hand, in the present embodiment, when the track down key 21 is operated during access, the operation immediately returns to the immediately preceding music piece, thereby avoiding a situation in which the operation is wasted.

[4. Other Embodiments] The present invention is not limited to the above embodiments, but includes other embodiments as exemplified below. For example, the disk reproducing apparatus and method and the recording medium on which the disk reproducing software is recorded are not limited to reproduction-only, and include a concept having a recording function and other functions. Further, the disk according to the present invention broadly refers to a recording medium on which digital information can be recorded, and is a concept including a large-capacity memory card for recording music.

The form of the switch can be freely selected, and is not limited to the form of a keyboard or a push button. For example, the function of a plurality of switches can be performed depending on how one switch is turned. Alternatively, a touch panel or a sensor that is used by holding a hand may be used. In addition, the elapsed time of 2 seconds exemplified in the above embodiment is merely an example, and can be freely determined such as adding 1 second, 3 seconds, or any other fraction. Type can be set freely. Further, a disk magazine or an autochanger for handling a plurality of disks is not essential.

The recording medium on which the disk reproducing software is recorded is realized as control software freely combining other functions such as pattern control of a spectrum analyzer display, or an upgrade ROM chip storing such control software. You can also.

Further, a disk such as an MD having the same format as the disk to be reproduced is provided with control software for realizing the present invention recorded in the form of a file or the like. , The control software may be installed in the user's disc playback device.

[0060]

As described above, according to the present invention, there is provided a disk reproducing apparatus and method and a disk reproducing software which can accurately select music of a digital disk such as a CD or MD without looking at a display. A recorded recording medium can be provided.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an example of a relationship between an elapsed time from a music selection operation and an operation by a track down key operation in the embodiment of the present invention.

FIG. 3 is a flowchart illustrating an example of a processing procedure when a track down key is operated in the embodiment of the present invention.

FIG. 4 is a flowchart illustrating an example of a processing procedure when a track up key is operated in the embodiment of the present invention.

FIG. 5 is a flowchart illustrating an example of a processing procedure for realizing a timer function in the embodiment of the present invention.

FIG. 6 is a conceptual diagram illustrating a state in which the track down key returns to the last song from the first song on the disc in the embodiment of the present invention.

FIG. 7 is a conceptual diagram showing a state in which a track is advanced from a last music piece to a first music piece by a track up key in the embodiment of the present invention.

FIG. 8 is a conceptual diagram showing an example of a relationship between a relative time and an operation by a track down key operation in the related art.

FIG. 9 is a flowchart illustrating an example of a processing procedure when a track down key is operated in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Display device 3 ... Microcomputer 4 ... CD-IC 5 ... Pickup 6 ... Speaker 7 ... Amplifier 8 ... D / A converter 21 ... Track down key 22 ... Track up key 23 ... Disc selection key 31 ... Down control part 32 ... Up control unit 33: Disk selection unit 34: Timer

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[Procedure amendment]

[Submission date] February 28, 2000 (200.2.2
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: DISK REPRODUCTION APPARATUS AND METHOD, AND RECORDING MEDIUM WHERE DISK REPRODUCTION SOFTWARE IS RECORDED

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a technique for reproducing a disc such as an MD, and more specifically, to accurately select music on a digital disc such as a CD or MD without looking at a display. It is possible to do it.

[0002]

2. Description of the Related Art In recent years, with the development of electronic technology, a digital disk (DISC) such as a CD (compact disk) and an MD (mini disk), and a disk reproducing apparatus (for reproducing music and the like recorded on these disks). Players) are becoming popular. In such a digital disc, a plurality of songs (also referred to as tracks) are recorded on one disc, and random access for playing back in a desired song order is possible. Can be selected by a key operation of the player. As the selection of such a song, the following cases can be considered from the viewpoint of the current song. 1. Select the next song 2. Listen to the current song again. On the other hand, this type of in-vehicle player such as a car audio system has a limited number of keys because the size of the operation panel is limited. Therefore, by assigning and switching two functions for one of the two keys such as the track up key and the track down key, the selection of the three kinds of music as described above can be performed in the following three ways.
Must be performed as a type of operation. 1. The next song is selected by operating the track up key. 2. Select the current song by operating the track down key. 3. The previous song is selected by operating the track down key. Thus, the selection of the current song and the selection of the previous song are two.
When the track down key has two functions, it is necessary to switch these functions.In the prior art, the player's pickup points to a point in minutes and seconds from the beginning of the currently playing or stopped song. The function of the track down key was switched on the basis of the distance (called relative time). In any of the three types of operations, the performance of the newly selected music starts at 0 minute 0 second relative time. Here, FIG. 8 is a conceptual diagram showing an example of the relationship between the relative time and the function of the track down key in the above-described conventional technology. INDEX) area. That is, in this example, the position from the beginning of a certain n-th song to less than 0 minute 1 second including the index area (range B
If the track down key is operated while the music is being played or stopped in 1), the previous n music is viewed from the n music currently being played.
The first song is selected. On the other hand, if the player is playing or stopping at a position (range B2) of 0 minutes 1 second or more, the n-th song, which is the current song, is selected again even if the same track down key is operated. The performance is started from 0 minutes and 0 seconds of the selected tune. Further, the flowchart of FIG. 9 shows an example of a procedure for performing the above-described processing when the track down key is operated in the related art. That is, in this procedure, when the track down key is operated, the relative time of the current song becomes 0.
It is checked whether the time is less than minute 1 second (step 91). If the time is 0 minute 1 second or more, the current song is selected again (step 9).
2) If the time is less than 0 minutes and 1 second, the previous music is selected (step 93). The relative time serving as a reference for switching the function of the track down key is displayed on the display of the player as position information indicating the reproduction position together with the current song number.

[0003]

However, in the above-mentioned prior art, the function of the track down key is switched according to the relative time, and the operator must look at the display to confirm the relative time. Therefore, if the track down key is operated without looking at the display, the function expected by the user may differ from the function that actually works.
It was difficult to operate accurately. SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems of the prior art, and an object of the present invention is to accurately select a song on a digital disk such as a CD or MD without looking at a display. It is to provide a technology for disc reproduction that can be performed. Another object of the present invention is to provide a disk playback technique for realizing an excellent user interface.
It is another object of the present invention to provide a disk playback technique for easily handling a plurality of disks.

[0004]

In order to achieve the above-mentioned object, a first aspect of the present invention is a disk reproducing apparatus for reproducing a track recorded on a disk, wherein a reproducing position is set to a current track or its current position. A first switch for returning to a previous track, a second switch for advancing a reproduction position from a current track to a next track, and
Or, after at least one of the second switches is operated, a measuring means for measuring a predetermined time, and the first switch is provided within the predetermined time.
If operated, move the playback position forward from the current track.
Back to the track, and out of the predetermined time,
When the switch 1 is operated, the playback position is set to the current position.
And control means configured to return to the truck . According to a sixth aspect of the present invention, the invention of the first aspect is viewed from the viewpoint of a method. In a disk reproducing method for reproducing a track recorded on a disk, a reproduction position is set to a current track or a track before the current track. A measuring step for measuring a predetermined time after at least one of a first operation for returning or a second operation for advancing the reproduction position from the current track to the next track is given; The predetermined time
When the first operation is given within the
Return to the previous track from the current track, and
If the first operation is given out of the allotted time,
Control step to return playback position to current track
And characterized in that: According to a ninth aspect of the present invention, there is provided a recording medium on which a disc reproducing software for reproducing a track recorded on a disc using a computer is recorded by using the computer of the first and sixth aspects. A predetermined operation is performed after at least one of a first operation for returning the reproduction position to the current track or the previous track or a second operation for moving the reproduction position from the current track to the next track is given. Measured time, the predetermined time
When the first operation is given within the
Return to the previous track from the current track, and
If the first operation is given out of the allotted time,
The reproduction position is returned to the current track . According to the first, sixth, and ninth aspects of the present invention, the function that operates when the first switch such as the track down key is operated is the first function.
Alternatively, the switching is performed based on the elapsed time from the previous operation of the second switch. More specifically, within a certain period of time from the previous operation, return to the previous track or song,
After a certain period of time, the currently playing song is selected again. Therefore, it is easy to determine whether the operation returns to the previous song or to the beginning of the current song based on the time interval of the switch operation,
It is possible to accurately select a song without checking the relative time from the beginning of the song on a display or the like. If the starting point of the certain time is limited to only the operation of the first switch such as the track down key, the operation of the first switch after the other operation will select the same music as the current one again. This may result in a potential invalidation. On the other hand, according to the present invention, a certain period of time is counted from other operations for selecting a song, and within that time, the music is returned to the immediately preceding song, so that the first operation immediately after such another operation is performed. Can be avoided.

According to a second aspect of the present invention, in the disk reproducing apparatus according to the first aspect, a third switch for selecting one from a plurality of disks is provided, and the measuring means includes the first, second, or third switch. The system is characterized in that the predetermined time is measured after at least one of the third switches is operated. The invention of claim 7 is
The invention of claim 2 is taken from the viewpoint of a method,
7. The disk reproducing method according to claim 6, wherein the measuring step is performed after at least one of the first operation, the second operation, or a third operation for selecting one from a plurality of disks is given. And measuring the predetermined time. In the invention of claims 2 and 7,
Even after a new disk is selected by the third switch, if the first switch is operated within a certain period of time, the music returns to the previous song. In this way, the criteria for switching functions are
By unifying the time interval from the operation related to selection, a consistent and easy-to-understand user interface is realized. Such an easy-to-understand user interface is particularly useful in a setting in which the last song is cyclically selected when returning to the previous song from the first song on the disc. The disc selected from the plurality is, for example, pulled out from a disc magazine and transported to a disc reproducing mechanism.

According to a third aspect of the present invention, in the disk reproducing apparatus according to the second aspect, an arbitrary one of a plurality of disks is read in accordance with an operation given by the third switch.
And means for selecting one of them. According to the third aspect of the present invention, an arbitrary one of a plurality of disks can be selected at random by the third switch, so that the degree of freedom of disk selection is improved.

According to a fourth aspect of the present invention, in the disk reproducing apparatus according to the second or third aspect, a disk currently selected from the plurality of disks ordered in advance according to an operation given by the third switch. Means for selecting the next disk or the previous disk. In the invention according to claim 4, when a disk is selected from among a plurality of disks by the third switch,
The next disk and the previous disk can be easily selected according to a predetermined order. For this reason, for example, a disc different from the present one can be easily enjoyed without being lost depending on the storage of which disc is in the disc magazine.

According to a fifth aspect of the present invention, in the disk reproducing apparatus according to any one of the first to fourth aspects, the control means controls the first switch during a predetermined preparation operation for a current track. Is operated so that the playback position is returned from the current track to the previous track when is operated. The invention of claim 8 is the invention of claim 5
The invention of claim 1 is taken from the viewpoint of a method.
Or the disk reproducing method according to 7, wherein the control step returns the reproduction position from the current track to the previous track when the first operation is given during a predetermined preparation operation for the current track. It is characterized by the following. According to the fifth and eighth aspects of the present invention, if a predetermined preparation operation is being performed, such as during a seek operation of the pickup, even if a certain period of time has passed since the previous operation, the first switch can be used to set one.
You can return to the previous song. That is, when the first switch is operated as early as possible during the preparation operation for reproducing a certain current song, the user often wants to listen to the song immediately before the current one. By operating the function of returning to the previous song, a user interface that is easy to use according to the user's intention is realized. Also, if the first switch is operated during the preparation operation as described above, if the same music as the current one is selected again, the preparation operation for the same music is repeated, and the operation becomes practically invalid. Possibilities arise. On the other hand, in the present invention, the first operation is performed during the preparation operation.
By unconditionally returning to the previous song when the switch is operated, the operation can be prevented from being wasted.

[0009]

Embodiments of the present invention (hereinafter referred to as "embodiments") will be described below with reference to the drawings. In order to realize the present invention and the embodiment, it is generally considered that software including a program code and data controls a computer and its surrounding circuits and devices. Such software is made by combining instructions according to the statements in this specification,
The method described in the related art is also used for the common parts with the above related art. And the software is CP
The functions and effects of the present invention are realized by utilizing physical resources such as U, peripheral circuits, input / output devices, storage devices such as memories, and disk playback mechanisms. However, various forms and configurations can be considered for software and hardware, and a part of the functions of the present invention can be realized by a physical electronic circuit such as an LSI. For this reason,
The present invention and embodiments will be described using virtual circuit blocks that realize individual functions included in the present invention and embodiments.

[1. Configuration] The present embodiment is a car audio system (referred to as "the present system") for reproducing tracks (songs) recorded on a digital disc (referred to as a "disc") such as a CD or MD. If the track down key is pressed within a predetermined period of time or during a predetermined preparation operation after the key operation for the key, the previous song is returned.

FIG. 1 is a functional block diagram showing the configuration of the present system. That is, in the first embodiment, the display 1, the track down key 21, the track up key 22, the disc selection key 23, the CD-IC 4,
Pickup 5, speaker 6, amplifier 7, D / A
A converter 8 and a microcomputer 3 are provided. Here, although not shown, the present system includes a so-called autochanger that stores a plurality of disks in a magazine in advance and automatically loads a selected disk to a disk reproducing mechanism. The pickup 5 illustrated in FIG. , As a representative of an autochanger including such a disk reproducing mechanism. CD-IC
A microcomputer 4 controls an autochanger represented by the pickup 5 and, among the digital data read from the disk by the pickup 5, manages sub-codes, that is, management data including positional information such as a song number and a relative time. 3 for transmitting a music signal representing sound to the D / A converter 8. The microcomputer 3
The CD-IC 4 is operated according to various operations given from the keys 21, 22, 23 and other input devices (not shown).
Means for controlling each part of the present system. The microcomputer 3 sends information such as a performance command based on such various operations and
-It is configured to control the IC4. In the above-described autochanger represented by the pickup 5, operations such as reading digital data from a disk such as a CD or MD and selecting a disk or a track via the pickup 5 are performed based on such control. . The display 1 is a part for displaying information such as the total number of songs on the disc, the total playing time and title, the number of the track (song), the title and the relative time, and includes a liquid crystal display (LCD) with a backlight. It consists of. The microcomputer 3 has a CD-I
The display unit 1 is configured to display position information such as a song number and a relative time transmitted from C4. The D / A converter 8 is a means for converting a music signal representing sound into an analog signal among digital data read from the disk by the pickup 5, and the amplifier 7 amplifies the analog signal. Means for outputting from the speaker 6. The track down key 21 is a first switch for returning the playback position to the current track or the beginning of the previous track, and the track up key 22 is used to shift the playback position from the current track to the beginning of the next track. Is a second switch for proceeding to (2). The disk selection key 23 is a third switch for selecting one from a plurality of disks stored in the disk magazine. Further, the microcomputer 3 plays a role of a down control unit 31, an up control unit 32, a disk selection unit 33, and a timer 34 by an operation of software (not shown) as described above. The up control section 32 controls the CD-IC 4 when the track up key 22 is pressed, thereby moving the reproduction position from the current track to the next track. Also, the down control unit 3
1 indicates that when the track down key 21 is pressed, the CD
A portion for returning the reproduction position to the current track or the previous track by controlling the IC 4;
The disk selection unit 33 is a part for selecting one from a plurality of disks stored in the disk magazine by controlling the CD-IC 4 in accordance with an operation given from the disk selection key 23. . The timer 34 is a measuring means for measuring a predetermined time after at least one of the keys 21, 22, 23 is operated. Specifically, when such an operation is performed, The operation is started and stopped after 2 seconds. Therefore, by referring to whether or not the timer 34 is operating, it is possible to easily determine whether or not the time is within a predetermined time after at least one of the keys 21, 22, 23 is operated. When the track down key 21 is operated within a predetermined time measured by the timer 34 or during a predetermined preparation operation for the current track, the down control unit 31 changes the playback position from the current track. It is configured to return to the previous track. The down control unit 31 operates the track down key 2 during the above-mentioned time or other than during the preparation operation.
When 1 is operated, the current track is selected again as the reproduction position. The microcomputer 3 including the down control unit 31 thus configured
Corresponds to the control means according to the present invention. When selecting one from a plurality of disks in accordance with an operation given by the disk selection key 23, the disk selection unit 33 selects an arbitrary one from the plurality of disks, and From such a plurality of disks, the next disk or the previous disk of the currently selected disk is configured to be selected.

[2. Operation] The present embodiment configured as described above operates as follows. [2-1. Outline of Operation] In the present embodiment, the function of the track down key 21 is switched based on the elapsed time from the last operation related to music selection (referred to as music selection operation) and whether or not a predetermined preparation operation is being performed. Is performed. Here, examples of the music selection operation include an operation of the track down key 21, an operation of the track up key 22, and an operation of the disc selection key 23. Also, the “preparation operation” means that the seek of the pickup or the TOC (Table Of C
ontents) or stopped during a search operation such as reading, etc.
It expresses. That is, when the track down key 21 is operated, during access, the immediately preceding music currently being played is selected regardless of the elapsed time from the immediately preceding music selection operation. In addition, even when the music is not being accessed and within a certain period of time from the immediately preceding music selection operation, the immediately preceding music is selected. If a certain time has passed since the last music selection operation except during access, the music currently being played is selected again. Also, when the track up key 22 is operated, the next tune is always selected irrespective of the above conditions. In any case, the performance of the song newly selected in this way is started from the position of the relative time of 0 minute 0 second of the song, and at the same time, the measurement of the fixed time from the song selection operation is newly started, The fixed time measured in this manner is used as a function switching reference when the track down key 21 is operated next time. Here, FIG. 2 shows, as a specific example, a concept showing the relationship between the elapsed time from when the track down key 21 is operated to the next time the track down key 21 is operated again and the function that works as a result of the operation. FIG. In this figure, a time zone of two seconds after the music selection operation is called a range A1, and other time zones are called a range A2. Further, "n" in this figure indicates a music piece performed at the time when the music selection operation is performed. That is, in this example, it is assumed that the track down key 21 has been operated, for example, when the performance has been heard for a while, and this operation is referred to as a first track down key operation or a first operation. This time point is included in the range A2 when two seconds or more have passed since the last music selection operation before that, and as a result of the first operation, the current music piece, the nth music piece, is selected again. The performance starts from the beginning. At the same time, the range A1 is set for two seconds from the time when the first operation is performed, and the second track down key operation (referred to as the second operation) is performed within two seconds after the first operation. The (n-1) th tune, which is the tune immediately before the tune currently being played, is selected. On the other hand, the time zone in which two seconds or more have elapsed since the first operation is again the range A2, and when the track down key 21 is operated two seconds after the first operation, the music being played at that time is again performed. Selected. When the track up key 22 or the disc select key 23 is pressed instead of the first track down key operation, the operation result differs from that of FIG. Or the disc is selected, but the result when the track down key 21 is operated within two seconds thereafter is the same as the above example. Although not shown, in the case where the operation of the track down key 21 is performed during the access, the music immediately preceding the currently playing music is selected regardless of the elapsed time from the immediately preceding music selection operation. . For example, if the track up key 22 is operated during the reproduction of the second track, a search operation for the third track is performed, and the track is being accessed. If done, it will return to the second song.

[2-2. Processing procedure when track down key is operated] Next, an example of a processing procedure executed when the track down key 21 is operated in the present embodiment is shown in the flowchart of FIG. That is, when the track down key 21 is operated (STAR in FIG. 3)
T), the down control unit 31 first determines whether or not access is being made (step 31). If access is being made, the down control unit 31 selects the previous song (step 34). If it is determined that the access is not being made in step 31, the down control unit 31
It is checked whether the timer 34 is operating, that is, within two seconds from the previous music selection operation (step 32). If the timer 34 is operating, the previous music is selected as in the case of access. (Step 34). On the other hand, timer 3
If No. 4 is stopped, select the current song (step 3
3). In any of these cases, the timer 34 for measuring the elapsed time from the music selection operation is reset and activated (step 35). That is, in step 35,
Even if the timer 34 is already operating and two seconds have not yet elapsed, the timer 34 is reset and restarted.
If the track down key 21 is repeatedly pressed at intervals shorter than seconds, it is possible to return to the previous song one by one even if two seconds or more have elapsed since the first press.

[2-3. Processing procedure when track up key is operated] In addition, when the track up key 22 is operated, the up control unit 32 selects the next song after the current one as illustrated in the flowchart of FIG. Then, the timer 34 is reset and activated (step 42). Similarly, when the disk selection key 23 is operated, the disk selection unit 33 performs a disk selection process and resets and starts the timer 34. In this way, by resetting and starting the timer 34 at any music selection operation, the track down key 21 allows the user to return to the previous music by the track down key 21 within 2 seconds from any music selection operation. A certain user interface is realized. When one of a plurality of disks is selected by the disk selection key 23, an arbitrary one of the plurality of disks can be directly specified and selected by the operation of the disk selection unit 33. From such ordered disks, the next or previous disk of the currently selected disk may also be selected. These two
One of the modes may be adopted, or one of the modes may be used by switching.

[2-4. Operation procedure of timer]
The function of the timer 34 started according to the procedure illustrated in FIG. 4 or the procedure illustrated in FIG. 4 can be realized, for example, by repeatedly executing the operation procedure illustrated in FIG. In other words, this procedure is repeatedly executed at a constant cycle, but performs different processing depending on whether the timer is operating or not. Specifically, first, it is determined whether or not the timer is operating (step 51). If the timer is stopped, the process ends. If the timer is operating, whether or not a certain time has elapsed since the timer was started is determined. Is determined (step 52), and if the fixed time has not elapsed, the processing is terminated as it is, but if the fixed time has elapsed, the timer is stopped. Whether the timer is operating or stopped can be represented by, for example, a predetermined flag or the like.

[3. Effects] As described above, in the first embodiment, the function that operates when the track down key 21 is operated is switched based on the elapsed time from the previous music selection operation using the keys 21, 22, and 23. In other words, if within 2 seconds from the previous music selection operation, the track returns to the previous track or music, and after 2 seconds, the music currently being played is selected again.
Therefore, whether to return to the previous song or to the beginning of the current song by operating the track down key 21 can be easily determined based on the key operation time interval, and the relative time from the beginning of the song can be confirmed on a display or the like. Needless to say, it is possible to select a song accurately. If the starting point for two seconds is limited to the operation of the track down key 21 only, the operation of the track down key 21 performed after the other operation is effectively invalidated because the same music as the current one is selected again. May occur. On the other hand, in this embodiment, the time of 2 seconds is measured also from other operations for music selection, and if it is within 2 seconds, it returns to the previous music, and immediately after such other operations, It is possible to avoid a situation in which the operation of the track down key 21 is wasted. Further, in the present embodiment, even after a new disk is selected by the disk selection key 23, if the track down key 21 is operated within two seconds, the music returns to the previous music. In this way, by unifying the criteria for switching functions to the time interval from the music selection operation, a consistent and easy-to-understand user interface is realized.

Here, in the present invention, the disk 1
For example, when it is attempted to return to the immediately preceding song by the track down key 21 from the song, as shown in FIG. 6, a setting to cyclically return to the last song is possible. Although setting is possible, the user interface which is easy to understand as realized by the present embodiment as described above has a great benefit particularly in the case of setting returning. That is, in such a setting, by repeatedly operating the track down key 21, the final song can be heard again after passing the first song of the disc. Thus, the operation of searching for a desired song is made more efficient. Note that the above-described cyclic setting can be performed for the track up key 22 as illustrated in FIG. 7, but it is also possible to freely use such a setting.

Further, in the present embodiment, the disc selection key 23 and the disc selection unit 33 are operated to randomly select any one of a plurality of discs, thereby improving the degree of freedom in disc selection. In the present embodiment, the disk selection key 23 and the disk selection unit 33
By allowing the user to freely select the next disk or the previous disk according to a predetermined order,
For example, it is possible to easily enjoy a disc different from the present one without being lost depending on the memory of which disc is in the disc magazine.

Further, in the present embodiment, the track can be returned to the immediately preceding music by the track down key 21 even if two seconds have passed since the last operation during access.
In other words, if the track down key 21 is operated as early as possible while a certain current song is being accessed, another
In many cases, the user wants to listen to the previous song. In such a case, by using the function of returning to the previous song, a user-friendly user interface according to the user's intention is realized. Also, if the track down key 21 is operated during the access as described above and the same song as the current song is selected again, the access operation to the same song is repeated,
The operation may be effectively invalidated. On the other hand, in the present embodiment, when the track down key 21 is operated during access, the operation immediately returns to the immediately preceding music piece, thereby avoiding a situation in which the operation is wasted.

[4. Other Embodiments] The present invention is not limited to the above embodiments, but includes other embodiments as exemplified below. For example, the disk reproducing apparatus and method and the recording medium on which the disk reproducing software is recorded are not limited to reproduction-only, and include a concept having a recording function and other functions. Further, the disk according to the present invention broadly refers to a recording medium on which digital information can be recorded, and is a concept including a large-capacity memory card for recording music. In addition, the form of the switch can be freely selected, and is not limited to the form of a keyboard or a push button. For example, the function of a plurality of switches can be performed depending on how one switch is turned, or a touch panel Alternatively, a sensor that is used by holding a hand may be used. In addition, the elapsed time of 2 seconds exemplified in the above embodiment is merely an example, and can be freely determined such as adding 1 second, 3 seconds, or any other fraction. Type can be set freely. Further, a disk magazine or an autochanger for handling a plurality of disks is not essential. In addition, the recording medium on which the software for disc reproduction is recorded can be realized as control software in which other functions such as pattern control of a spectrum analyzer display are freely combined, or an upgrade ROM chip in which such control software is stored. it can. Further, a disk such as an MD having the same format as the disk to be reproduced is provided with control software for realizing the present invention recorded in a file or the like, and the user inserts the disk into a disk reproducing device. Thus, such control software may be installed in the user's disc playback device.

[0021]

As described above, according to the present invention, there is provided a disk reproducing apparatus and method and a disk reproducing software which can accurately select music of a digital disk such as a CD or MD without looking at a display. A recorded recording medium can be provided.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an example of a relationship between an elapsed time from a music selection operation and an operation by a track down key operation in the embodiment of the present invention.

FIG. 3 is a flowchart illustrating an example of a processing procedure when a track down key is operated in the embodiment of the present invention.

FIG. 4 is a flowchart illustrating an example of a processing procedure when a track up key is operated in the embodiment of the present invention.

FIG. 5 is a flowchart illustrating an example of a processing procedure for realizing a timer function in the embodiment of the present invention.

FIG. 6 is a conceptual diagram illustrating a state in which the track down key returns to the last song from the first song on the disc in the embodiment of the present invention.

FIG. 7 is a conceptual diagram showing a state in which a track is advanced from a last song on a disc to a first song by a track up key in the embodiment of the present invention.

FIG. 8 is a conceptual diagram showing an example of a relationship between a relative time and an operation by a track down key operation in the related art.

FIG. 9 is a flowchart illustrating an example of a processing procedure when a track down key is operated in the related art.

[Description of Signs] 1 ... Display device 3 ... Microcomputer 4 ... CD-IC 5 ... Pickup 6 ... Speaker 7 ... Amplifier 8 ... D / A converter 21 ... Track down key 22 ... Track up key 23 ... Disc selection key 31 ... Down control unit 32 ... Up control unit 33 ... Disk selection unit 34 ... Timer

Claims (9)

[Claims] 1. A disc reproducing apparatus for reproducing a track recorded on a disc, comprising: a first switch for returning a reproduction position to a current track or a previous track; A second switch for advancing to the next track, measuring means for measuring a predetermined time after at least one of the first switch or the second switch is operated, and the predetermined switch And a control unit configured to return a reproduction position from a current track to a previous track when the first switch is operated within a predetermined time. 2. The apparatus according to claim 1, further comprising: a third switch for selecting one from a plurality of disks, wherein the measuring unit is configured to operate the at least one of the first, second, and third switches after operating at least one of the first, second, and third switches. 2. The disc reproducing apparatus according to claim 1, wherein the disc reproducing apparatus is configured to measure a predetermined time. 3. The disk reproducing apparatus according to claim 2, further comprising means for selecting an arbitrary one from a plurality of disks according to an operation given by said third switch. 4. A means for selecting a next disk or a previous disk of a currently selected disk from the plurality of pre-ordered disks according to an operation provided by the third switch. 4. The disk reproducing apparatus according to claim 2, wherein: 5. The control means is configured to return a reproduction position from a current track to a previous track when the first switch is operated during a predetermined preparation operation for a current track. The disk reproducing apparatus according to claim 1, wherein: 6. A disc reproducing method for reproducing a track recorded on a disc, wherein a first operation for returning a reproduction position to a current track or a previous track or a reproduction position is performed from a current track to a next operation. A measuring step for measuring a predetermined time after at least one of the second operations for proceeding to the track is provided, and the first operation being provided within the predetermined time And a control step for returning the playback position from the current track to the previous track. 7. The method according to claim 1, wherein the measuring step includes:
After receiving at least one of the second operation or the third operation for selecting one from the plurality of disks,
7. The method according to claim 6, wherein the predetermined time is measured. 8. The method according to claim 1, wherein the control step returns a reproduction position from a current track to a previous track when the first operation is given during a predetermined preparation operation for a current track. 8. The disc reproducing method according to claim 6, wherein 9. A recording medium on which a disc reproducing software for reproducing a track recorded on a disc using a computer is recorded. The software sends the reproducing position to a current track or a previous track. A predetermined time is measured after at least one of a first operation for returning to the first track or a second operation for moving the playback position from the current track to the next track is given, and A recording medium on which disk playback software is recorded, wherein the playback position is returned from a current track to a previous track when the first operation is given within a given time.