JP3465601B2 - Music information playback device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music information reproducing apparatus, and more particularly to a music information reproducing apparatus for temporarily storing music information read from a recording medium in a memory and reproducing the music information.

[0002]

2. Description of the Related Art In an MD (Mini Disk) player, compressed data is read from a disk, temporarily stored in a buffer memory, and then expanded by an ATRAC decoder to reproduce music information. Therefore, the pickup reads the data from the disc and stores it in the memory prior to the data actually reproduced as music. At this time, a ring buffer is used as the memory.

FIG. 12 is an explanatory diagram of a ring buffer operation at the time of conventional all repeat reproduction. The data is taken in at the point P1, and the data is read out at the point P2 which is delayed by the time T0 from the point P1. In the case of all-repeat playback, if the addresses of the first and second songs are continuous, even if the first song changes to the second song at point P3, the data of the second song is automatically read at point P1. When the reproduction point P2 reaches P3, the second music is automatically reproduced.

FIG. 13 is a diagram for explaining the operation of the conventional ring buffer when changing the reproduction mode. 12, those parts which are the same as those corresponding parts in FIG. 12 are designated by the same reference numerals, and a description thereof will be omitted. When the all-repeat play is changed to the single-repeat play in the vicinity of the tune, the data of the second tune has already been fetched from the point P3 by the all-repeat play, so when the change is made to the single-repeat play, the point P is changed.
It is necessary to return to 3 and read the data of the first song. Therefore, the data of the read second song is wasted.

[0005]

In addition to the normal reproduction mode, the MD player has a repeat reproduction mode for repeatedly reproducing a predetermined music, a program reproduction mode for reproducing in a desired music order, and the like. If there is a change in the playback mode while playing in the specified playback mode, the preceding data is stored in the memory as described above, so the data already stored and the data requested by the change Inconsistencies may occur.

An example will be described below. Now, let's assume that all songs are being played in the all-repeat playback mode in which they are repeatedly played. Here, if the playback mode is changed to the single repeat playback mode in which only one song is repeatedly played, it is necessary to retake the first data of the first song from the point A, which is the turn of the song.

[0007] Therefore, when the amount of data from the address of the currently playing until the turn of the song is very little, too late the time to pick-up again to take the head of the data of one song first move, resulting in playback There was a problem that it was cut off. Sound invention can play seamlessly music information without been made in view of the above, the sound varied in any timing reproduction mode is interrupted
It is an object to provide a music information reproducing device.

[0008]

SUMMARY OF THE INVENTION The present invention provides a plurality of musical information.
A reader for reading music information from a storage medium on which information is recorded
And the music information read from the reading means.
First and second storage units that store temporally, and the first and second storage units
The music information stored in the second storage unit is read out and the audio data is read.
Output means to output as data
A plurality of playback modes that play the music information in a predetermined order.
Select a predetermined playback mode from the
It is possible to change it at a square or a preset point
Set by the playback mode setting means and the playback mode setting means
When playing back based on the playback mode
The transition of the music information read from the reading means or
Separation detection means for detecting preset points, and
It is read from the reading means by the division detection means.
A transition point of music information or a preset point is detected
The current playback mode changes to another playback mode.
If it is changed, it should be read next in the other playback mode.
Determination means for determining possible music information, and
It can be read next in the other playback mode by the disconnecting means.
Read the beginning part of music information that is judged to have potential in order
The first storage part is stored in the second storage part
Read out music information according to the current playback mode from
During playback, the playback mode is set by the playback mode setting means.
Mode changes from the current playback mode to the other playback mode.
When changed, the sound according to the other changed playback mode
The music information is read from the second storage unit,
Music read from the second storage unit in the first storage unit
The music information following the information is stored and read from the second storage unit.
Following the music information that has been found, the music is recorded from the first storage section.
Control means for controlling to read information
Is characterized by.

Further, according to the present invention, the second storage section is constituted by areas obtained by dividing the first storage section. Further, the present invention provides
While the music information is being read from the second storage unit, information that follows the information that is being read is read and stored in the first storage unit. According to the present invention, when the division of the music information is reached, the music information according to the change of the reproduction mode is read out and stored in advance, so that the stored music information can be obtained no matter what timing the reproduction mode is changed. By reading out, the sound can be reproduced seamlessly without interruption.

Further, according to the present invention, when the break is reached during the reproduction of the music, the head portion of the music information which may be read next depending on the change of the reproduction mode is read and stored in the storage unit. Therefore, it is not necessary to read the beginning portion of the music in advance before reproducing the music. Furthermore, since it is sufficient to store only the beginning portion of a required song without storing the beginning portions of all the songs, the storage capacity required for this can be reduced.

[0011]

1 is a block diagram of an embodiment of the present invention. The music information reproducing apparatus 1 of the present embodiment mainly includes an optical pickup 2, an RF amplifier 3, an EFM / ACI.
RC modulator / demodulator 4, ADIP demodulator 5, controller 6, controller 7, encoder / decoder 8, converter 9,
It is composed of the operation unit 10.

The optical pickup 2 irradiates the optical disk 11 with a laser beam LD and detects the reflected light to detect the mark formed on the optical disk 11. The detection signal detected by the optical pickup 2 is supplied to the RF amplifier 3. The RF amplifier 3 amplifies a high-frequency detection signal detected by the optical pickup 2. The detection signal amplified by the RF amplifier 3 is sent to the EFM / ACIRC modulator / demodulator 4,
It is supplied to the ADIP demodulator 5 and the control unit 6.

The EFM / ACIRC modulator / demodulator 4 demodulates audio data from the detection signal detected by the RF amplifier 3 during reproduction. Further, at the time of recording, modulation is performed according to the recording data. ADIP demodulator 5 is RF amplifier 3
A predetermined signal is demodulated from the signal supplied from. AD
The data demodulated by the IP demodulator 5 is EFM / A
It is supplied to the CIRC modulation / demodulation unit 4.

The control unit 6 has a detection signal from the RF amplifier 3, a demodulation signal from the EFM / ACIRC modulator / demodulator 4,
Control signals are supplied from the control unit 7, and the optical pickup 2 is controlled according to these signals. The control unit 7 uses the memory 1
2, memory controller 13 and microcomputer 14. The memory 12 temporarily holds the reproduced voice data.

FIG. 2 is a data structure diagram of the memory according to the embodiment of the present invention. The memory 12 is composed of a main data area 21 and reader data areas 22-1 to 22-n. The main data area 21 constitutes a ring buffer and stores music data which is being reproduced or is about to be reproduced.

The reader data areas 22-1 to 22-n are
The data of the head portion of the music data that may be played according to the change of the play mode is stored. The reader data areas 22-1 to 22-n are provided, for example, by the number of modes in which a contradiction occurs with reproduction data when the mode is changed. The amount of data fetched into the reader data areas 22-1 to 22-n is about 1 to 4 clusters (about 2 to 8 seconds), although it depends on the access time of the drive.

When the reproduction mode is changed to reach a portion where a conflict with the requested data occurs, the reading of data is switched from the main data area 21 to the prestored reader data areas 22-1 to 22-n. Read the desired data. During this time, the optical pickup 2 is moved to a portion where data following the data stored in the read data areas 22-1 to 22-n is stored, reproduction is performed, and the main data 21 is written. As a result, even if the reproduction mode is changed midway, the audio can be reproduced seamlessly without interruption.

Here, the memory 12 is divided into a plurality of areas to obtain the main data area 21 and the reader data areas 22-1 to 22-n, but these may be configured by different memories. Good. Below, an example of the operation when the reproduction mode is changed in the repeat reproduction mode will be described with reference to a flowchart.

FIG. 3 and FIG. 4 show operation flowcharts during the all-repeat reproduction according to the embodiment of the present invention. First, the write operation to the memory during the all-repeat reproduction will be described with reference to FIG. During the all-repeat reproduction (step S1-1), when the reading of data by the optical pickup 2 reaches the end point B of the tune or the preset arbitrary end repeat reproduction between A and B (step 1- 2) If the song is the end, move the optical pickup 2 to the beginning position of the song, and if it is the end point, move to the beginning point A (step S1-3).

In step S1-3, when the head position or start point of the music is reached, a predetermined amount of data is read from that point, and the read data areas 22-1 to 22-1 of the memory 12
22-n. In other words, if there is a change to the single repeat play mode during all repeat play, the beginning of the song that has finished playing can be played seamlessly, and the change to the AB repeat play mode during the all repeat play can be changed. If there is, the head data is stored in advance so that the data can be reproduced from the start point A without a break after reaching the end point.

Next, if there is no change in the reproduction mode, the next song or point B will be continuously reproduced, so the optical pickup 2 is moved to the beginning position of the next song or point B. Then, a predetermined amount of data is read therefrom and stored in the reader data area 22-1 of the memory 12 (step S1-4). When the storage in the reader data area 22-1 is completed, the data to be subsequently reproduced is written in the main data area 21.

If the reading of data by the optical pickup 2 has not reached the end point B of the song or the end point in the preset repeat reproduction between A and B, it is possible to change to the reproduction mode. Is checked (step S1-5). When the reproduction mode is changed in step S1-5, it is determined whether or not the main data needs to be rewritten (step S1-).
6). That is, due to the change of the reproduction mode, the main data area 2 is stored following the end of the storage in the reader data area 22.
If there is a contradiction between the data already written in No. 1 and the data to be reproduced, it is necessary to rewrite the contradiction data. In this case, the pickup 2 is moved to rewrite the main data to reproduce the data following the predetermined amount of data stored in the reader data area selected by changing the reproduction mode, and the changed reproduction mode is set. Shift (steps S1-7, S1-
8). If the main data does not need to be rewritten, that is, if there is no contradiction between the data already stored in the main data and the data to be actually reproduced even if the reproduction mode is changed, the main data is rewritten. Without changing to the changed playback mode.

If there is no change in the reproduction mode in step S1-5, the all repeat reproduction mode is maintained. Next, the read operation from the memory during the all-repeat reproduction will be described with reference to FIG. First, pickup 2
The data that has been reproduced by and is stored in the main data area is read (step S1-9). Next, memory 1
It is determined whether the reading of the data from 2 has reached the end of the song or the end point (step S1-1).
0). In step S1-10, if the end of the song or the end point is not reached, the reading of data from the main data area is continued. When the end of the song or the point of the end is reached, it is next checked whether or not there is a change in the playback mode (step S1-1).
1).

In step S1-11, when the reproduction mode is changed, the reader data area 22 of the memory 12 is changed.
Of the -1 to 22-n, the reader data area in which the data corresponding to the changed mode is stored is read (step S1-12). Then, after that, the mode is changed to the changed reproduction mode (step S1-13). If there is no change in the playback mode, the reader data area 2 of the memory 12
Of the 2-1 to 22-n, after reading the leader data area in which the data following the head data or the end point of the next song is stored (step S1-14), the subsequent reading of the main data is performed. And keep the all repeat playback mode.

FIG. 5 and FIG. 6 show operation flowcharts during single repeat reproduction according to an embodiment of the present invention. First, the write operation to the memory during single repeat reproduction will be described with reference to FIG. During the single repeat playback (step S2-1), when the reading of the data by the pickup reaches the end of the song or the end point (step S2-2), in the case of the end of the song, to the beginning position of the next song, In the case of the end point, the optical pickup 2 is moved to the start point A. When the start position or the start point of the next song is reached, a predetermined amount of data is read from that point and stored in the read data areas 22-1 to 22-n of the buffer memory 12 according to the mode (step S2). -3).

Next, if the reproduction mode is not changed, the original song is repeated or is played continuously from the end point, so the pickup is set to the beginning position or the end point of the original song. It moves, reads a predetermined amount of data therefrom, and stores it in the area of the reader data areas 22-1 to 22-n of the buffer memory 12 that is predetermined according to the mode (step S2-4).

When the storage in the predetermined reader data area is completed, the data to be reproduced subsequently is transferred to the main data area 21.
Write in. The reading of data by the optical pickup 2 is performed at the end of the tune or any preset AB
If the end point B in the repeat reproduction during the period has not been reached, it is checked whether or not there is a change in the reproduction mode (step S2-5).

When the reproduction mode is changed in step S2-5, it is determined whether or not the main data needs to be rewritten (step S2-6). Step S
If it is determined in 2-6 that the main data needs to be rewritten, the pickup 2 is used to reproduce the data following the predetermined amount of data stored in the reader data area selected by changing the reproduction mode. After moving, the main data is rewritten, and the mode is changed to the changed reproduction mode (steps S2-7 and S2-8). Also, step S2
In -6, if rewriting the main data is not necessary,
The changed playback mode is entered without rewriting the main data.

Further, in step S2-5, when the reproduction mode is not changed, the single repeat reproduction mode is maintained. Next, the data read operation from the memory during the single repeat reproduction will be described with reference to FIG. First, the data reproduced by the pickup 2 and stored in the main data area is read (step S2-
9). Next, it is judged whether the reading of the data from the memory 12 has reached the end or the end point of the music (step S2-10). In step S2-10, if the end of the song or the end point is not reached, the data reading from the main data area is continued. If the end of the song or the end point is reached, it is next checked whether or not there is a change in the playback mode (step S2-11).

If the reproduction mode is changed in step S2-11, the reader data area 22- of the memory 12-
The data is read from the reader data area in which the data corresponding to the changed mode is stored among 1 to 22-n (step S2-12). Then, after that, the mode is changed to the changed reproduction mode (step S2-13). If there is no change in the playback mode, the reader data area 22-1 to 22-n of the memory 12 is read out from the reader data area in which the data following the start data or the end point of the original song is stored. After (Step S2-1
4) Then, the main data is read out thereafter, and the single repeat reproduction mode is maintained.

FIG. 7 and FIG. 8 show operation flowcharts during program repeat reproduction according to an embodiment of the present invention.
First, the operation of writing data into the memory during program repeat reproduction will be described with reference to FIG. During the program repeat reproduction (step S3-1), when the reading of the data by the optical pickup 2 reaches the end of the song (step S3-2), the optical pickup 2 is moved to the beginning position of the next song and from there. A predetermined amount of data is read and stored in the read data area 22-1 of the memory 12.

Next, the pickup is moved to the beginning position of the original music piece, data is read from the pickup by a predetermined amount and stored in the read data area 22-2 of the memory 12 (step S3-3). Next, if there is no change in the playback mode,
The next programmed song will be played, so
Move the pickup to the beginning position of the next program song and read a predetermined amount of data from there
It is stored in the reader data areas 22-2 and 22-3 (step 3-4).

When the reading of data by the optical pickup 2 reaches the end point B (step S
3-5), move the pickup to point A at the beginning, read a predetermined amount of data from there, and store in memory 1
2 in the read data area 22-1 (step 3
-6). Next, if the reproduction mode is not changed, the reproduction is continued from the point B. Therefore, the pickup 2 is moved to the point B, and a predetermined amount of data is read from the pickup 2 to read the data in the reader data area of the memory 12. 22-2
(Step S3-7).

When the storage in the main data area 22-2 or 22-3 is completed, the data to be reproduced subsequently is written in the main data area 21. If the reading of the data by the optical pickup 2 has not reached the end point B of the end of the song or a preset arbitrary AB repeat reproduction, it is checked whether or not there is a change in the reproduction mode (step S3-8).

When the reproduction mode is changed in step S3-8, it is determined whether or not the main data needs to be rewritten (step S3-9). Step S
If it is determined in 3-9 that the main data needs to be rewritten, the pickup 2 is used to reproduce the data following the predetermined amount of data stored in the reader data area selected by changing the reproduction mode. After moving, the main data is rewritten, and the changed reproduction mode is entered (steps S3-10 and S3-11). If the main data does not need to be rewritten, the main data is not rewritten and the changed reproduction mode is entered.

If there is no change in the reproduction mode in step S3-8, the program reproduction mode is maintained. next,
A read operation from the memory during the program repeat reproduction will be described with reference to FIG. First, pickup 2
The data that is reproduced and stored in the main data area is read (step S3-12). Next, it is judged whether the reading of the data from the memory 12 has reached the end of the song or the end point (step S3-).
13).

In step S3-13, if the end of the song or the end point is not reached, the reading of data from the main data area is continued. When the end or the end point of the music is reached in step S3-13, it is next checked whether or not the reproduction mode is changed (step S3-14). If the reproduction mode is changed in step S3-14, the reader data area of the memory 12 in which the data corresponding to the changed mode is stored is read out. Perform (step S3-15).
Then, after that, the mode is changed to the changed reproduction mode (step S3-16).

If there is no change in the reproduction mode, the leader data area 2 of the memory 12 in which the head data or the data following the end point of the next programmed music is stored.
After reading 2-2 or 22-3 (step S
3-17), the main data is read subsequently, and the program repeat reproduction mode is maintained. In addition,
Only the repeat playback mode is mentioned here,
Of course, the present invention can be applied not only to the program reproduction mode but also to the reproduction mode such as the single reproduction mode.

FIG. 9 is an operation explanatory diagram of the main data area according to the embodiment of the present invention. At time t0, the first and second songs are replaced. At this time, when the reproduction mode is changed to the single mode, the beginning portion of the first music piece stored in the reader data area 22-2 is read and reproduced, and during this time, the reader data area starts again from time t0 of the main data area 21. 22
The data of the first music following the first music stored in -2 is stored.

If the reproduction mode is not changed, the beginning part of the second music stored in the reader data area 22-1 is reproduced, and the leader data area 22-1 continues from time t0 of the main data area 21 during this time. The data of the second song is stored. FIG. 10 shows a diagram for explaining the reproducing operation of the embodiment of the present invention. If the reproduction mode is changed to the single reproduction mode at time t1, the reader data area 22-2
When the data of the first song is read from the first data, the beginning of the data of the first song is reproduced, and the data in the reader data area 22-2 ends, the main data area 21 is reproduced and continues to the reader data area 22-2. The data of the first music is reproduced, and the data of the first music is continuously reproduced.

If the reproduction mode does not change at time t1,
When the data of the second music is read from the reader data area 22-1 and the beginning of the data of the second music is reproduced and the data of the reader data area 22-1 ends, the main data area 21 is reproduced and the leader data area The data of the second music that follows 22-1 is reproduced, and the data of the second music is continuously reproduced.

FIG. 11 is a diagram for explaining another reproducing operation of the embodiment of the present invention. As shown in FIG. 11, the length of the data of the first music and the fourth music is the leader data area 22-1.
The length of the data of the second and third songs is larger than the capacity of 22-n and smaller than the capacity of the reader data areas 22-1 to 22-n. If the first, second, third, and fourth songs are reproduced in this order, the second and third songs need only be stored in the reader data areas 22-2 and 22-3, so the first song is completed. After that, the main data area 21
The data following the leader data area 22-4 of the fourth music is stored in.

In this embodiment, the case of reproducing the music information has been described, but the present invention is not limited to the music information, but can be applied to the case of reproducing the information in various reproduction modes such as repetitive reproduction.

[0044]

As described above, according to the present invention, when the division of the music information is reached, the music information corresponding to the change of the reproduction mode is read out and stored in advance to change the reproduction mode at any timing. Even if it is done, by reading the stored music information, there is a feature that the sound can be reproduced seamlessly without interruption.

Further, according to the present invention, when the break is reached during the reproduction of the music, the leading portion of the music information which may be read next depending on the change of the reproduction mode is read and stored in the storage unit. Therefore, there is a feature that it is not necessary to read the beginning portion of the music in advance before reproducing the music. Further, according to the present invention, since it is sufficient to store only the beginning portion of a required song without storing the beginning portion of all the songs, the storage capacity required for this can be reduced.

[Brief description of drawings]

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

FIG. 2 is a data configuration diagram of a memory according to an embodiment of the present invention.

FIG. 3 is an operation flowchart during all-repeat reproduction according to an embodiment of the present invention.

FIG. 4 is an operation flowchart during all-repeat playback according to an embodiment of the present invention.

FIG. 5 is an operation flowchart during single repeat reproduction according to an embodiment of the present invention.

FIG. 6 is an operation flowchart during single repeat reproduction according to an embodiment of the present invention.

FIG. 7 is an operation flowchart during program repeat reproduction according to an embodiment of the present invention.

FIG. 8 is an operation flowchart during program repeat reproduction according to an embodiment of the present invention.

FIG. 9 is an operation explanatory diagram of a main data area according to an embodiment of the present invention.

FIG. 10 is an operation explanatory diagram of the embodiment of the present invention.

FIG. 11 is a diagram for explaining another reproducing operation according to the embodiment of the present invention.

FIG. 12 is an explanatory diagram of the operation of the ring buffer during the all-repeat reproduction of the conventional example.

FIG. 13 is a diagram for explaining the operation of the ring buffer during single repeat reproduction in the conventional example.

[Explanation of symbols]

1 Information playback device 2 optical pickup 3 RF amplifier 4 EFM / ACIRC modem 5 ADIP demodulator 6 control section 7 control unit 8 ATRAC modem 9 Converter 10 Operation part 11 optical disc 12 memories 13 Memory controller 14 Microcomputer

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Claims (3)

(57) [Claims] 1. A plurality ofmusicsA storage medium on which information is recorded
FrommusicsReading means for reading information, The data read from the reading meansmusicsInformation temporarily
First and second storage units for storing, Stored in the first and second storagesmusicsRead the information
Output means for outputting and outputting as voice data,The music information is recorded in a predetermined order that is different from each other.
Predetermined playback mode from multiple playback modes to play
At the transition of the music information or a preset point
The playback mode setting means that can be changed, Based on the reproduction mode set by the reproduction mode setting means.
Read from the reading means during playback.
Transition of music information or preset points
Detect Division detection means,The division detection means reads out from the reading means.
The transition point of the music information or the preset point
When played, the current playback mode changes to another playback mode.
If changed, read next in the other playback mode
It should be possible A judgment means for judging music information,Next read by the judgment means in the other reproduction mode.
Order the beginning of the music information that was determined to be
The first memory, the second memory unit stores the first memory,
Read the music information according to the current playback mode from the storage unit.
While it is being projected, the playback mode setting device
The raw mode changes from the current playback mode to the other playback mode.
Mode is changed to another playback mode that has been changed.
Read the same music information from the second storage unit,
Read from the second storage section into the first storage section
The second storage unit for storing music information following the music information
From the first storage unit following the music information read from
Control to read music information from With control means
Characterized bymusicsInformation reproduction device. 2. The information reproducing apparatus according to claim 1, wherein the second storage unit is an area obtained by dividing the first storage unit. 3. The control means reads the information following the information being read by the reading means while the information is being read from the second storage section, and the first means is also provided. The information reproducing apparatus according to claim 1, wherein the information reproducing apparatus is controlled so as to be stored in a storage unit.