JPH07153190A - Information reproducing device - Google Patents

Abstract

PURPOSE:To reproduce information repeatedly and without intermission by outputting recorded information of the starting part previously stored, successively, reading out information from a recorded medium, when a sensor is returned to the starting recorded position from the end of a repeating region. CONSTITUTION:After a compact disk(CD) is set, when a synchro fade loop(SFL) switch is pressed and successively a music number is specified by ten key, a CPU 103 writes a time code of a recorded position in which an accent of a specified music number exists in a storage section 104. Next, the CPU 103 reads a music signal from data of a recorded position of a CD corresponding to an accent position from which fade in/out is started, and stores it to a storage section 105. In this condition, when a START switch is pressed, loop reproducing is started through an information reading section 101. And when a sensor reaches a position corresponding to a fade out start accent, the starting part of a specified music stored in the storage section 105 is faded in, successively, reproducing is performed from the CD.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for returning a reproduction position from the end of a repeat area to the beginning when an information string is repeatedly reproduced in an information reproducing apparatus such as a CD player.

[0002]

2. Description of the Related Art Conventionally, when an information sequence of one music piece or the like is repeatedly reproduced (hereinafter referred to as loop reproduction) on a CD player or the like, a search for the beginning of the music piece is started after the reproduction of the music piece is completely completed. , After the disc access time, the playback of the same song was restarted again.

[0003]

However, for example, when it is desired to continuously reproduce one song, the blank time generated when returning from the end portion of the song to the beginning portion feels that the song has been concentrated until now. However, there is a problem that some things are very annoying to the listener.

An object of the present invention is to make it possible to smoothly and continuously reproduce the information strings at the end and the beginning of the repeated area when returning the reproduction position from the end to the beginning of the repeated area.

[0005]

According to the present invention, first, recording information reading means (information reading section 10) for sequentially reading recording information such as music signals recorded on a recording medium such as a CD.
1).

Next, in the record information read by the record information reading means, the first record position corresponding to the beginning and end of the repeatedly reproduced section and synchronized with the cycle information included in the record information. Repeated recording position acquisition means (corresponding to the access data writing process of FIGS. 10 and 11 and the first storage unit 104) for acquiring the (fade-in start accent 221) and the second recording position (fade-out start accent 222). Have.
This means extracts accent positions by extracting an amplitude envelope from a music signal corresponding to a music piece to be loop-reproduced, and sets each accent position corresponding to the beginning portion and the end portion of the music as the first recording position and the first recording position. It is detected as the second recording position.

[0007] Subsequently, there is provided partial recording information group storage means (second storage section 105) for storing a partial recording information group which is recording information of a predetermined part starting from the first recording position.
Further, while the record information is being reproduced through the record information reading means, the record information read by the record information reading means is output while fading out from the time when the reproduction position reaches the second record position. Reading the recording information of the partial recording information group stored in the partial recording information group storage means while fading in,
It has a crossfade output means (corresponding to the crossfade processing of FIGS. 13 and 14) that mixes the recorded information with the recorded information that is output while fading out and outputs the mixed information.

Further, after the value of the recording information read out by the recording information reading means and outputted while being faded out from the crossfade output means becomes 0 (after the crossfade time 207 elapses), the crossfade output means. Within the period (during disk access time 208) during which the remaining record information of the partial record information group stored in the partial record information group storage means is being output, the record information following the partial record information group is recorded. It has a read position search means (corresponding to step 1324 in FIG. 14) for searching the read position on the recording medium.

In addition, when the crossfade output means finishes outputting the record information of the partial record information group, the record information reading means is instructed to read the record information from the read position searched by the read position searching means. It has an instruction means (corresponding to step 1307 in FIG. 14).

Then, while the crossfade output means is outputting the record information of the partial record information group, the output of the crossfade output means is selected and outputted, and during the other period, the output of the record information read means. Output switching means for selecting and outputting (step 1301 of FIG. 13 and FIG.
4 (corresponding to step 1308).

In the above-mentioned configuration of the invention, it is also possible to adopt a configuration in which crossfade is not performed. In this case, it has the following configuration. First, the following partial recording information group output means is provided instead of the crossfade output means. That is, the partial recording information group output means stores the partial recording information group storage means from the time when the reproduction position reaches the second recording position when the recording information is reproduced through the recording information reading means. The record information of the stored partial record information group is output.

Next, the above-mentioned read position searching means is
During the period in which the partial record information group output means outputs the record information of the partial record information group, the read position where the record information following the partial record information group is recorded is searched on the recording medium.

Further, the instructing means causes the recording information reading means to cause the recording information reading means to record information from the reading position searched by the reading position searching means when the partial recording information group outputting means finishes outputting the recording information of the partial recording information group. To read.

The above-mentioned output switching means selects and outputs the output of the partial recording information group output means while the partial recording information group outputting means is outputting the recording information of the partial recording information group, During other periods, the output of the recording information reading means is selected and output.

[0015]

According to the present invention, when the information sequence is repeatedly reproduced (loop reproduction), when the reproduction position returns from the second recording position, which is the end of the repeated area, to the first recording position, which is the beginning, The recording information of the partial recording information group starting from the first recording position stored in the recording information group storage means is output, and the recording information subsequent to the partial recording information group is recorded on the recording medium on which the recording information is recorded. The location is searched. Then, after the output of the partial record information group is completed, the record information is read from the read position searched on the recording medium.

As a result, the reproduction of the recorded information can be promptly shifted to the reproduction of the recorded information of the next recording unit without sudden interruption. In this case, since the second recording position at the end and the first recording position at the beginning of the repeated area are both synchronized with the period information included in the record information, for example, the accent timing of the music signal, the record information Loop playback can be performed without disturbing the feeling of being concentrated on songs until now, without disturbing the periodic state such as accents in.

Further, since the recorded information at the end of the repeated area and the recorded information at the beginning of the repeated area are cross-faded and reproduced, an aurally or visually pleasing effect can be added.

Further, in the case where the cross-fading is not performed, the repetitive operation can be instantaneously performed without the waiting time corresponding to the access time to the recording medium.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings. <Structure> FIG. 1 is an overall structure diagram of an embodiment of the present invention.

The information reading section 101 is a CD (Compact
A device for reading information such as a music signal recorded on a recording medium such as a disc. At this time, in addition to the music signal, information such as the song number and time code is also read.

The switch group 102 starts reproduction of a CD,
It has a START and STOP switch for ending, a ten key for directly designating a music number and switching, and a synchro-fade loop (hereinafter referred to as SFL) switch for selecting whether or not the music is loop-reproduced.

The CPU 103 is a CD which is set in a holder (not shown) for the information reading section 101.
The control unit controls the normal reproduction operation of the music signal from, and the crossfade reproduction operation described later.

A music signal read from the information reading unit 101 or the second storage unit 105 based on a control operation to be described later by the CPU 103 is converted into an analog signal by the D / A converter 106, and the amplifier 107 and the speaker 108. The corresponding musical sound is emitted via.

First storage unit 104 (accent RAM)
In, the time code of the recording position where the accent exists is stored for each music. Second storage unit 105 (music RA
In M), the music signal of the portion where the cross-fade reproduction is performed at the beginning of the music is stored for each music. The storage contents of each storage unit are operated during crossfade reproduction, which will be described later. <Data Structure> Next, FIG. 2 shows data stored in a register in the CPU 103.

The playing flag 201 indicates whether or not the current song is being played. The current song number 202 indicates the song number currently being played. The SFL switch-on flag 203 indicates whether or not the SFL switch of the switch group 102 has been pressed.

The SFL song number selection flag 204 is set to SF.
It indicates whether or not the L switch is pressed to wait for designation of the music number by the ten keys. Crossfade flag 2
Reference numeral 05 indicates whether or not crossfade processing is currently being performed.

The music RAM access flag 206 indicates whether or not a music signal is currently being read from the second storage section 105 (music RAM). Crossfade time 207
Stores the number of blocks corresponding to the time when crossfade reproduction is performed. Here, one block is 1/75 second.

The disk access time 208 stores the number of blocks corresponding to the time required for disk access. The crossfade counter 209 counts the number of blocks corresponding to the crossfade time during the crossfade processing.

The music RAM access counter 210 counts the number of blocks corresponding to the time of the music signal read from the second storage section 105. The music RAM access address 211 is the second storage unit 10 currently being accessed.
The address of 5 is stored.

The music RAM unused address 212 is the second
The storage unit 105 stores the start address of a storage area that is not used. The accent RAM write address 213 stores an address at the time of writing accent data to the first storage unit 104 (accent RAM). The accent RAM read address 214 is the first
The address when the accent data is read from the storage unit 104 is stored.

Accent RAM unused address 215
Stores the start address of a storage area that is not used in the first storage unit 104. Accent start position 2
16 stores a time code (indicated by the number of blocks from the beginning of the song) at the recording position where the accent starts when the accent is detected. The accent end position 217 stores the time code (indicated by the number of blocks from the beginning of the song) of the recording position where the accent ends when the accent is detected. The number of accent areas 218 is the accent start position 2
From the recording position indicated by 16 to the accent end position 217
The number of blocks up to the recording position indicated by is stored as the number of accent areas.

The previous accent position 219 stores the previous accent position when the accent is detected. The current accent position 220 stores the current accent position when the accent is detected.

Fade-in start accent 22 of # 1 to #N
1 stores the accent position at which fade-in is started at the time of loop reproduction of each of the first to Nth songs. The fade-out start accent 222 of # 1 to #N is
The accent position at which fade-out is started is stored during loop playback of each of the first to Nth songs.

Each of the above data 213 to 222 is used in the accent data writing process shown in the operation flowcharts of FIGS. 10 and 11 which will be described later.
Next, FIGS. 3 to 5 are views showing the data format of the CD.

First, FIG. 3 is a structural diagram of a frame in a CD. One frame includes a subcode 302 (1 symbol), an L channel music signal 303 (12 symbols (=
6 samples)), error correction code 304 (4 symbols), R channel music signal 305 (12 symbols (= 6
Sample)), and a sync signal 301 (24 bits) is added to the beginning of a data string consisting of error correction code 306 (4 symbols).

Next, FIG. 4 is a configuration diagram of the subcode in the CD. First, the subcode 302 (1 symbol) in one frame shown in FIG. 3 is composed of 1-bit each of P, Q, R, S, T, U, V, and W channel meaning data. Composed.

By collecting these 98-bit data of 8 bits each consisting of 1 bit respectively, as shown in FIG. 4, sub-code data of 8 channels each consisting of 98 bits is obtained. Here, 98 frames are called one block. The time of this one block corresponds to 1/75 second. In the embodiment of the present invention, various operations, which will be described later, are controlled by the time taken as a unit of this block.

In FIG. 4, the leading 2 bits (bit 0 and bit 1) 401 of each channel consisting of 98 bits are bits indicating the leading frame of the above-mentioned block (= 98 frames), and the subcode. Called the sink.

In the P channel (bit 2 to bit 97), music head data 402 indicating the head of the music is stored. Q
Channels (bit 2 to bit 97) include 4-bit control code 403, 4-bit mode 404, 9
Q channel data 405 of symbols and error correction code 406 of 2 symbols are stored.

Graphic data is stored in the R to W channels, for example. The control code 403 in the Q channel is the L channel music signal 30 of FIG.
It shows whether music data or CD-ROM data is stored in the areas of the 3 and R channel music signals 305. In this embodiment, as shown in FIG. 3, since music data is stored, the control code 403 represents a code to that effect.

The mode 404 in the Q channel shows the contents of the Q channel data 405. For music CDs, this value is usually set to 0001. In this case,
As shown in FIG.
Song number 501, index 502, subcode 302
(FIG. 3) is a time code (minute 503, second 504, block 505) indicating the relative time from the beginning of the song, and a time code (minute 5) indicating the absolute time from the beginning of the CD.
07, seconds 508, block 509) are recorded.
The area 506 is not used.

Next, FIG. 6 is a data format diagram of the first storage unit 104 (FIG. 1). First storage unit 10
In the addresses 000000H to {4 × (N−1)} H of 4, the start address of the storage area of the accent data of each music is the first music accent data address, the second music accent data address, ... It is stored as a data address. For example, the address 00000
As the first music accent data address stored in 0H, the head address 000100H of the storage area of the first music accent data is stored.

Then, accent data of each piece of music is stored in each storage area indicated by the above-mentioned accent data address. These accent data are stored in the first storage unit 104 by the accent data writing process shown in the operation flowcharts of FIGS.

Next, FIG. 7 is a data format diagram of the second storage unit 105 (FIG. 1). Second storage unit 10
At addresses 000000H to {4 × (N−1)} H of 5, the start address of the storage area of the fade data of each song is the first song fade data address, the second song fade data address, ... It is stored as a data address. For example, the first song fade data address stored at address 000000H is 1
Start address 000 of storage area for fade data of song
100H is stored.

The fade data of each piece of music is stored in each storage area indicated by the above-mentioned fade data address. These fade data are stored in the second storage unit 105 by the fade data writing process shown in the operation flowchart of FIG. 12 described later. These fade data are music signals at the beginning of each music for a predetermined time (corresponding to the crossfade time). <Operation Principle> The operation principle of the embodiment of the present invention having the above-described configuration will be described below.

First, when a new CD is set in a holder (not shown) and the START switch is pressed without pressing the SFL switch in the switch group 102 in FIG. 1, the normal CD reproduction mode is started. Is
The CPU 103 instructs the information reading unit 101 to reproduce the music signal of the first music piece. In this state, if the song number is changed with the ten keys of the switch group 102, C
The PU 103 instructs the information reading unit 101 to change the normal song number and reproduce the music signal of the changed song.

On the other hand, after a new CD is set in a holder (not shown), the SFL switch is pressed in the switch group 102 of FIG. 1, and subsequently, when the tune number is specified by the ten keys, the CPU 103 is specified. The amplitude envelope value of the music signal is detected over the entire music number of the music number, and the time code of the recording position where the accent exists is written in the first storage unit 104. next,
The CPU 103 extracts the accent position at which fade-in starts and the accent position at which fade-out starts for the designated music based on the stored contents of the first storage unit 104, and stores these in a register in the CPU 103 for fade-in start accent. 221 and fade-out start accent 222 are stored. Furthermore, the CPU 103
Reads the music signal for the time corresponding to the crossfade time 207 (FIG. 2) from the recording position corresponding to the fade-in start accent 221 for the designated music recorded on the CD, and stores it in the second storage unit 105. I will remember.

In this state, the STAR of the switch group 102 is
When the T switch is pressed, the CPU 103 reads the music signal of the designated song via the information reading unit 101 and starts loop reproduction.

FIG. 8 is an operation explanatory diagram of crossfade reproduction (synchronized crossfade reproduction) executed when the reproduction position is returned from the end of the music to the beginning during the loop reproduction.

When the reproduction position reaches the position corresponding to the fade-out start accent 222 corresponding to the specified music stored in the register in the CPU 103 during the reproduction of the music signal of the specified music, the operation shown in FIG. By the crossfade processing shown in the flow chart, C
The crossfade flag 205 and the music RAM access flag 206 stored in the register in the PU 103 are set to 1.

As a result, the CPU 103 fades out the music signal of the designated music read from the CD through the information reading unit 101 in the crossfade processing shown in the operation flowcharts of FIGS.
At the same time, the CPU 103 fades in the music signal of the head portion of the designated music stored in the second storage unit 105 in the above-described crossfade processing.

In the second storage section 105, the music signal from the beginning accent position corresponding to the fade-in start accent 221 among the music signals at the beginning of the designated music is stored. Therefore, the accent position at the end of the designated song and the accent position at the beginning of the designated song are synchronized and cross-fading is reproduced.

Subsequently, when the time corresponding to the crossfade time 207 stored in the register in the CPU 103 has elapsed, the crossfade flag 205 is reset to 0, and the reading of the music signal of the designated music from the CD is completed. To be Along with this, the recording position of the music signal of the designated music is advanced on the CD by a time corresponding to {crossfade time 207 + disk access time 208} from the initial accent position corresponding to the fade-in start accent 221. It During this period, the reading of the music signal of the designated music is continued from the second storage unit 105. In this case, since the crossfade process has been completed, the amplitude value of the music signal read from the second storage unit 105 is equal to the amplitude value of the music signal originally recorded on the CD.

When the time corresponding to the disk access time 208 stored in the register in the CPU 103 has elapsed, the music RAM access flag 206 is reset to 0, and the music signal of the designated music is read out by the second storage unit. The reading from 105 is switched to the reading from CD.

As described above, the smooth loop reproduction from the end of the music to the beginning by the synchro-crossfade reproduction is realized. <Specific Operation> A specific operation of the embodiment of the present invention based on the above operation principle will be described below.

In the embodiment of the present invention, the CPU 103 repeatedly executes the switch fetch process shown in the operation flowchart of FIG. 9 and the crossfade process shown in the operation flowchart of FIG. The operations shown in these operation flowcharts are realized as operations in which the CPU 103 executes a control program stored in a ROM (not shown) or the like.

In the switch fetching process of FIG. 9, the control operation corresponding to the operation of the switch group 102 of FIG. 1 is executed. First, in step 901, the switch group 102 (FIG. 1) is scanned.

In step 902, it is determined whether or not the START switch (FIG. 1) is turned on based on the result of the key scan in step 901. Step 9
If the determination in 02 is YES, then in step 903, SF
It is determined whether or not the L tune number selecting flag 204 is set to 1. This flag indicates whether or not it is in the state of waiting for the music number designation after the SFL switch is turned on.

Therefore, if the song number designation waiting state after the SFL switch is turned on is present and the determination in step 903 is YES, the CDs in steps 904 to 906 are brought into the reproduction state even if the START switch is pressed. The control operation for this is not executed, and the switch fetch processing of FIG.

On the other hand, if the determination in step 903 is NO,
In step 904, the playing flag 201 stored in the register in the CPU 103 is set to 1 to indicate that the song is being played. As will be described later, the during-playback flag 201 is used to prevent the operation of the SFL switch from being valid during the playback of the music.

Next, at step 905, it is judged if the SFL switch-on flag 203 is set to 1. This flag indicates whether or not the SFL switch of the switch group 102 has been pressed and is in a state where loop reproduction should be performed.

When the START switch is pressed in the state where the loop reproduction is to be performed and the determination in step 905 is YES, the song number to be loop reproduced has already been specified (see step 918 described later). ), The step 906 is not executed and the switch fetching process of FIG. 9 is ended.

On the other hand, when the START switch is pressed in the normal state and the determination in step 905 is NO, 1 is set to the current song number 202 stored in the register in the CPU 103. After that, the switch acquisition process of FIG. 9 is terminated. As a result, it is indicated that the first music piece is currently being reproduced. In this case, in step 1307 of FIG. 14, which will be described later, the information reading unit 101 is instructed to perform a normal reproducing operation of the song having the song number corresponding to the current song number 202.

The above steps 903 to 906 are STA
This is the operation when the RT switch is turned on. On the other hand, S
The TART switch is not turned on, and step 902
If the determination is NO, it is determined in step 907 whether the STOP switch (FIG. 1) is turned on.

If the judgment in step 907 is YES, the reproducing flag 201 is reset to 0 in step 908 to indicate that the music is not currently reproduced. As a result, in step 1307 of FIG. 14 described later, the information reading unit 101 is instructed to stop the reproduction of the music signal.

This step 908 is the operation when the STOP switch is turned on. After that, the switch acquisition process of FIG. 9 is terminated. On the other hand, if the STOP switch is not turned on and the determination in step 907 is NO,
In step 909, it is determined whether the reproducing flag 201 stored in the register in the CPU 103 is set to 1.

A song 201 is currently being reproduced and is being reproduced.
When the determination in step 909 is YES because 1 has been set to, the control operation related to the operation of the SFL switch after step 913 is not performed. That is, the operation of the SFL switch is invalid during the reproduction.

When the determination in step 909 is YES, it is determined in step 910 whether the tune number has been changed by operating the ten keys. The song number has not been changed, and the determination in step 910 is NO.
In this case, the switch fetching process of FIG. 9 is finished as it is.

The song number has been changed, and step 910
If the determination is YES, the changed music number is set as the current music number 202 stored in the register in the CPU 103.

Further, when the tune number is changed in this way, the SFL switch-on flag 203 is reset in step 912 in order to cancel the loop reproduction which is currently being performed. The SFL song number in-selection flag 204 has already been reset to 0.

As a result of the above processing, the information reading unit 101 is instructed to change the reproduced music in step 1307 of FIG. 14 described later. Steps 910 to 912 above
Is the operation when the song number is changed during the reproduction of the music signal. After step 912, the switch loading process of FIG. 9 is terminated.

On the other hand, if the determination in step 909 is NO because the currently playing song is not being played and 1 is not set in the playing flag 201, in step 913, S
SFL switch on flag 2 stored in the register in the CPU 103 when the FL switch is turned off
It is determined whether 03 is reset to 0 or not.

The SFL switch is turned off and step 91
If the determination in step 3 is YES, then in step 912, the SFL switch-on flag 203 and the SFL song number selecting flag 20
4 is reset to 0.

The above step 912 is the operation when the SFL switch is turned off. After that, the switch acquisition process of FIG. 9 is terminated. On the other hand, if the SFL switch is not turned off and the determination in step 913 is NO, it is determined in step 914 whether the SFL switch is turned on and 1 is set in the SFL switch on flag 203 stored in the register in the CPU 103. To be judged.

The SFL switch is turned on and step 914
If the determination is YES, then in step 915 the SFL switch is turned on, and thereafter the SFL switch on flag 2
03 and SFL song number selection flag 204 is set to 1.

This step 915 is the operation when the SFL switch is turned on. After that, the switch acquisition process of FIG. 9 is terminated. If the SFL switch is not turned on and the determination in step 914 is no, step 91
At 6, it is determined whether the SFL song number in-selection flag 204 is set to 1.

Since the SFL switch is currently turned on, there is no waiting state for designating the music number, and the determination in step 916 is NO.
In this case, the switch fetching process of FIG. 9 is finished as it is.

On the other hand, if the tune number designation waiting state after the SFL switch is turned on is present and the judgment in step 916 is YES, in step 917, the numeric keypad (see FIG.
It is determined whether or not the song number is designated by the switch group 102).

If the tune number has not been specified yet and the determination in step 917 is NO, the switch fetching process of FIG. 9 is terminated and the execution of the next switch fetching process is awaited.

When the tune number is designated and the determination in step 917 is YES, in steps 918 to 922, a preparation process for a crossfade process, which will be described later, is executed.

That is, first, in step 918, the CPU 10
As the current music piece number 202 stored in the register within 3, the music piece number designated by the ten keys is set.
This song number is n.

At step 919, the value of the SFL music piece number selecting flag 204 is reset to zero. Step 92
At 0, it is determined whether or not the fade-in start accent 221 (and the fade-out start accent 222) corresponding to the designated music number n is stored in the register in the CPU 103.

Now, in the initial state where the CD is set, it is confirmed that the values of the fade-in start accent 221 (and the fade-out start accent 222) of all the songs are not stored by the initialization processing not shown. It is set to a null value which is the indicated value, and the music signal of the head portion of each music piece of the CD is not written in the second storage unit 105.

In such a case, step 92
The determination of 0 is NO, and in step 921, accent data writing processing to the first storage unit 104 is performed, and subsequently, in step 922, fade data writing processing to the second storage unit 105 is performed. Details of the accent data writing process are shown in the operation flowcharts of FIGS. 10 and 11, and details of the fade data writing process are shown in the operation flowchart of FIG.

First, the details of the accent data writing process in step 921 will be described with reference to the operation flowcharts of FIGS. 10 and 11 and the operation explanatory diagrams of FIGS. 15 and 16.

First, the outline of the accent data writing process will be described with reference to FIGS. 15 and 16. Process Group 1: Accent Data Extraction Process First, the time code value X of a music signal having an amplitude envelope value equal to or larger than a predetermined value is stored in the first storage unit 104 in the n-th music throughout the music of the designated music number n. They are sequentially written as accent data (FIG. 15 (a)).

In this case, the time code value is C
A block 505 (see FIGS. 3 and 5) showing the relative time from the beginning of the music extracted from the subcode 302 read from D through the information reading unit 101.

The head address of the storage area of the nth music accent data on the first storage unit 104 is stored at the address {4 × (n−1)} H of the first storage unit n. It is indicated by the musical piece accent data address.

As shown in FIG. 15 (a), the above-mentioned accent data X indicates that an appropriate number of samples exist consecutively in time, and the accent portion has a certain width. . Process Group 2: Extraction Process of Representative Accent Data Next, the time code of the accent position representative of each accent area is extracted from the n-th music accent data X written in the first storage unit 104 as described above. To be done.

First, as shown in FIG. 15D, in the accent area where the accent data exist continuously in time, the first accent data is the accent start position 216 and the last accent data is the accent end position 217. The number of accent data in the meantime is set as the number of accent areas 218 and stored in the register in the CPU 103.

Then, the time code value X (the unit is a block) of the accent position representing the accent area is calculated by the following expression (1).

[0092]

[Formula 1] Time code value X = (accent start position 21
6 + accent end position 217) / (number of accent areas 218) The nth piece of accent data stored in the first storage unit 104 by the timecode value X of the accent position representing each accent area calculated in this way. Is rewritten (FIG. 15 (a) → (b)). Process group 3: Accent data synchronized with the tempo of the specified song
Then, the accent data other than the accent data synchronized with the tempo of the designated music is removed. There is an accent (data with a large amplitude envelope value) in the music, in addition to the accent synchronized with the tempo of the music. However, the majority of accent data is synchronized with the tempo of the song.

Therefore, all the time intervals (accent intervals) ΔX between the accent data adjacent to each other in the accent data X stored in the first storage section 104 corresponding to the designated music piece by the processing group 2 are calculated. Then, the average value of those ΔX is calculated (FIG. 15 (b)).

Next, the deviation of each accent interval from the average value is calculated, and the accent data corresponding to the accent interval that is greatly deviated is removed. In the present embodiment, first, {average value / 4} is set as the deviation amount, the process is performed once, and the nth music accent data stored in the first storage unit 104 is rewritten (FIG. 15).
(b) → (c)).

Next, with respect to the rewritten contents, the average value of the accent intervals between the accent data adjacent to each other is calculated, {average value / 8} is set as the deviation amount, and the process is performed again. Then, the nth music accent data stored in the first storage unit 104 is rewritten (FIG. 15 (c) = FIG. 16 (a) → (b)).

In this way, the time code value X of each accurate accent position is calculated. Processing group 4: fade-in start accent 221 and fade
Calculation process of the start-out accent 222 Finally, of the time code value X at each accent position corresponding to the music number n stored as the n-th music accent data in the first storage unit 104 as described above, the first accent From the time code value X at the position, the first storage unit 1
The position obtained by subtracting the accent interval obtained as the average value of all the accent intervals ΔX stored in 04 is stored in the register in the CPU 103 as the nth music fade-in start accent 221 (FIG. 16).
(c)). Further, the time code value X having a value closest to the value obtained by subtracting the time corresponding to the crossfade time 207 stored in the register in the CPU 103 from the time code value X at the last accent position is n.
CP as the song's fade-out start accent 222
It is stored in the register in U103 (Fig. 16 (c)).

Details of the accent data writing process based on the outline process shown in the above processing groups 1 to 4 will be described with reference to FIG.
11 and the operation flowchart of FIG. First, steps 1001 to 1005 of FIG. 10 correspond to the accent data extraction processing shown as the processing group 1 described above.

At step 1001, the accent RAM unused address 215 stored in the register in the CPU 103 corresponds to the music number n indicated by the current music number 202 stored in the register in the CPU 103. Initially set as the nth music accent data address of the section 104 (FIG. 6) and the accent RAM write address 213 (FIG. 2) in the register of the CPU 103. As a result, a storage area that is not used in the first storage unit 104 is allocated for the nth music accent data.

Then, for the information reading unit 101,
The reading of the music signal corresponding to the music number n indicated by the current music number 202 is instructed, and the processing of the following steps 1002 to 1004 is executed in block units.

That is, in step 1002, the amplitude envelope value of the music signal for one block (1/75 second) is
It is extracted from the CD via the information reading unit 101. In step 1003, it is determined whether or not the amplitude envelope value extracted in step 1002 exceeds a predetermined value.

If the determination in step 1003 is YES, in step 1004, the CD is stored in the storage area on the first storage section 104 corresponding to the accent RAM write address 213 stored in the register in the CPU 103. A block 505 (see FIG. 3 and FIG. 5) indicating the relative time from the beginning of the music, which is extracted from the sub-code 302 read out via the information reading unit 101, is written as the time code value X. Then the accent RAM
The value of the write address 213 is updated.

After the above processing or if the determination in step 1003 is NO, in step 1005, the CPU 1
It is determined whether or not all the music signals corresponding to the music piece number n indicated by the current music piece number 202 stored in the register within 03 have been fetched. This judgment is made in subcode 30.
This can be realized as an operation of determining whether or not the value of the block 505 indicating the relative time from the beginning of the music extracted from 2 has become 0.

If the determination in step 1005 is NO, steps 1002-1004 are repeated again. Through the above processing, the time code value X of the music signal having the amplitude value equal to or more than the predetermined value throughout the entire music piece of the specified music piece number n
Are sequentially written as the nth music accent data in the first storage unit 104 (FIG. 15 (a)).

If the determination in step 1005 is YES, then in steps 1006 to 1017, of the typical accent data extraction processing shown as the processing group 2 described above and the processing shown as the processing group 3 described above. The process of calculating the accent interval between accent data, which is the first half of the process, is executed.

First, in step 1006, the CPU 10
The number of accent areas stored in the register within 3 is 21
The value of 8 is set to 1. In step 1007, C
Accent R stored in a register in PU 103
The values of the AM read address 214 and the accent RAM write address 213 are initially set to values corresponding to the nth piece of accent data address stored in the address {4 × (n−1)} H of the first storage unit 104. Is set.

At step 1008, the accent RAM
The first time code value X (accent data) is read from the storage area of the first storage unit 104 indicated by the read address 214, and the first time code value X (accent data) is stored in a register in the CPU 103. It is set as the previous accent position 219 (FIG. 2). After that, the accent RAM read address 214 is updated.

At step 1009, the accent RAM
The next time code value X is read from the storage area of the first storage unit 104 indicated by the read address 214, and the read time code value X is C
It is set as the current accent position 220 (FIG. 2) stored in the register in the PU 103. After that, the accent RAM read address 214 is updated.

At step 1010, the time code value indicated by the current accent position 220 and the previous accent position 2
It is determined whether the difference from the time code value indicated by 19 is 1 or 2 or more.

If the difference is 1, step 10
At 11, the value of the accent area number 218 stored in the register in the CPU 103 is incremented by 1. Next, in step 1016, the value of the current accent position 220 is set as the previous accent position 219.

Then, in step 1017, it is determined whether or not all the nth piece of accent data on the first storage section 104 has been processed. Then, if all the processing is not completed and the determination in step 1017 is NO, the processing in steps 1009 to 1011, 1016 is repeated again.

By the series of processes described above, the accent area in which the accent data continuously exists in time is detected. In repeating the above process, step 1
If it is determined in 010 that the difference between the time code value indicated by the current accent position 220 and the time code value indicated by the previous accent position 219 is 2 or more, it is regarded as the boundary of the accent area, and Step 1012
The processes of 1016 are executed.

That is, in step 1012, the value of the previous accent position 219 is set as the accent end position 217 stored in the register in the CPU 103.

At step 1013, the time code value X of the accent position representative of the accent area detected as described above is calculated by the above-mentioned equation (1). As can be understood from the equation (1), the time code value X is calculated as the value at the midpoint between the accent start position 216 and the accent end position 217. At the same time, the difference between this time code value X and the time code value X calculated at the previous execution of step 1013 is calculated as the accent interval ΔX. The time code value X and the accent interval ΔX calculated in this way are written in the storage area on the first storage unit 104 indicated by the accent RAM write address 213. Then the accent RAM
The value of the write address 213 is updated (see FIG. 15 (b)).

Then, for the next accent area, in step 1014, the value of the current accent position 220 is set as the accent start position 216, and in step 1
At 015, 1 is set as the number of accent areas 218.

Further, in step 1016, the value of the current accent position 220 is set as the previous accent position 219. Then, if the processing for all the nth music accent data on the first storage unit 104 is not completed and the determination in step 1017 is NO, the processing in steps 1009 to 1011, 1016 is repeated.

By repeating the series of processes in steps 1006 to 1017 described above, the accent areas in which the accent data are temporally continuous are sequentially detected, and the time code value X at the accent position representing each accent area and 1 The accent interval ΔX, which is the difference from the time code value X at the immediately preceding accent position, is calculated, and the n-th piece of accent data on the first storage unit 104 is rewritten by these data sets.

The processing for all the n-th music accent data on the first storage unit 104 is completed, and step 101
If the determination in step 7 is YES, step 1018 in FIG.
Then, the average value of the accent interval ΔX which has been sequentially calculated in step 1013 is calculated.

Thereafter, the processing of steps 1019 to 1023 corresponds to the latter half of the processing of extracting the accent data synchronized with the tempo of the designated music shown as the processing group 3 described above, and is performed on the first storage unit 104. In the accent interval ΔX obtained as the n-th piece of accent data, a process in which the amount of deviation from the average value is {average value / 4} or more is removed.

That is, in step 1019, the value of the accent RAM read address 214 is set to the first storage unit 104.
Is initially set to a value obtained by adding 1 to the value corresponding to the nth music accent data address stored in the address {4 × (n−1)} H. Further, the value of the accent RAM write address 213 is initialized to the value corresponding to the nth piece of accent data address.

At step 1020, the accent RAM
The accent interval ΔX is read from the storage area on the first storage unit 104 indicated by the read address 214, and step 1
The difference from the average value calculated in 018 is calculated.

At step 1021, it is judged if this difference is smaller than {average value / 4}. Step 10
If the determination in step 21 is YES, in step 1022,
The accent interval ΔX read in step 1020 is written in the storage area on the first storage unit 104 indicated by the accent RAM write address 213. After that, the value of the accent RAM write address 213 is updated.

After step 1022 or step 102
If the determination in step 1 is NO, in step 1023, the first
It is determined whether or not all the nth piece of accent data on the storage unit 104 has been processed.

Then, if all the processing is not completed and the determination in step 1023 is NO, step 102 is performed again.
The processing of 0 to 1023 is repeated. Step 1 above
By the series of processing from 019 to 1023, the first storage unit 1
Among the accent intervals ΔX obtained as the nth music accent data on 04, those having a deviation amount from the average value of {average value / 4} or more are removed (FIG. 15 (b) → FIG. 1).
5 (c)).

The processing for all the n-th piece of accent data on the first storage unit 104 is completed, and step 102
When the determination result in step 3 is YES, in step 1024, the average value of the accent intervals ΔX newly written in the first storage unit 104 in step 1022 so far is calculated again.

Thereafter, the processing of steps 1025 to 1029 corresponds to the latter half of the processing of extracting the accent data synchronized with the tempo of the designated music shown as the processing group 3 described above, and the deviation amount from the average value is Of the accent intervals ΔX obtained as the nth piece of accent data on the first storage unit 104 so as to be smaller than {average value / 4}, the deviation amount from the average value is more than {average value / 8} This is the process of removing things.

In the series of processing in steps 1025 to 1029, the standard of the deviation amount is from {average value / 4} to {average value / 8}.
1019 to 10 described above, except that
This is the same as the series of processing in 23.

As described above, the time code value X at each accent position is accurately obtained as the n-th music accent data on the first storage section 104. Step 10
After the determination of 29 is YES, steps 1030 to 1030
1032 is executed. These processes are performed by the fade-in start accent 2 of the n-th song shown as the process group 4 described above.
It corresponds to the process of calculating the 21st and nth music fade-out start accents 222.

First, in step 1030, the CPU 10 is read for the next accent data writing process.
The value of the accent RAM write address 213 stored in the register in 3 is set to an unused address on the first storage unit 104.

In step 1031, the average value of the accent intervals ΔX of the respective accent positions stored in the first storage section 104 as the nth piece of accent data is calculated.

Then, in step 1032, of the time code values X at each accent position corresponding to the music number n stored in the first storage unit 104 as the n-th music accent data, the time code value X at the leading accent position. From this, the position obtained by subtracting the average value of the accent intervals calculated in step 1031 is stored in the register in the CPU 103 as the nth music fade-in start accent 221. Further, the time code value X having the value closest to the value obtained by subtracting the time corresponding to the crossfade time 207 stored in the register in the CPU 103 from the time code value X at the last accent position.
Is stored in the register in the CPU 103 as the fade-out start accent 222 for the nth music.

By the accent data writing process of step 921 of FIG. 9 shown in the operation flow charts of FIGS. 10 and 11 explained above, the nth tune fade-in start accents 221 and n corresponding to the tune number n designated in step 917. The tune fade-out start accent 222 is obtained in a register in the CPU 103.

Details of the fade data writing process executed in step 922 of FIG. 9 will be described below with reference to the operation flowchart of FIG. In FIG. 12, first, in step 1201, the information reading unit 101
On the other hand, in step 921, the seek of the recording position corresponding to the nth music fade-in start accent 221 obtained in the register in the CPU 103 is instructed.

At step 1202, the music RAM unused address 2 stored in the register in the CPU 103 is used.
12 is a fade data address of the n-th music in the second storage unit 105 corresponding to the music number n indicated by the current music number 202 stored in the register in the CPU 103 (FIG. 7),
And a music RAM access address 211 (FIG. 2) in a register of the CPU 103. As a result, a storage area that is not used in the second storage unit 105 is allocated for the n-th song fade data,
After that, the fade data of the n-th song is sequentially written from this address.

At step 1203, the second storage unit 10
As the time of the beginning portion of each song written in 5, {crossfade time 207 + disk access time 208}
The time corresponding to the
It is set as the AM access counter 210. The unit of this time is a block.

In step 1204, one block (= 1) currently read from the CD by the information reading unit 101 is stored in the address area of the second storage unit 105 indicated by the music RAM access address 211 stored in the register in the CPU 103. / 75 seconds) music signal is written.

At step 1205, the music RAM access address 211 stored in the register in the CPU 103 is updated by one block of music signal.
At step 1206, the value of the music RAM access counter 210 stored in the register in the CPU 103 is decremented by one.

At step 1207, it is judged if the value of the music RAM access counter 210 has become 0 or not. Then, the above-described steps 1204 to 1207 are repeated until this determination becomes YES. As a result, the head portion of the currently selected song is written in the second storage unit 105 by the time corresponding to {crossfade time 207 + disk access time 208}.

When the determination in step 1207 is YES, in step 1208, the value of the music RAM access address 211 stored in the register in the CPU 103 is set to the second value for the next fade data writing process.
Is set to an unused address on the storage unit 105 of the.

By the fade data writing process of step 922 of FIG. 9 shown in the operation flow chart of FIG. 12 explained above, the n-th fade data for loop reproduction corresponding to the music number n designated in step 917 becomes
It is obtained in the second storage unit 105.

In this case, after the writing process of steps 921 and 922 has been performed once, another song number is selected, and then the SFL switch is turned on again to select the same song number n. The nth music fade-in start accent 221 and the nth music fade-out start accent 222 corresponding to the music have been stored in the register in the CPU 103, and the nth music fade data corresponding to the music have been stored in the second storage unit 105. Therefore, it is not necessary to execute the writing process again. Therefore, in this case, since the determination in step 920 is YES, the writing processes in steps 921 and 922 are not executed.

The above steps 918 to 922 are SFL.
This is the operation when the switch is turned on and the song number is designated. The judgment after step 922 or step 920 is Y.
After becoming ES, the switch loading process of FIG. 9 is terminated.

When the START switch (FIG. 1) is turned on after the SFL switch is turned on and the song number is selected, the determination at step 902 is YES, the determination at step 903 is NO, and at step 904, the current song is The reproducing flag 201 stored in the register in the CPU 103 is set to 1 to indicate that the reproducing operation is being performed.
Furthermore, if the determination in step 905 is YES,
The switch fetching process of FIG. 9 is finished as it is.

Subsequently, in the crossfade processing shown in the operation flowcharts of FIGS. 13 and 14 described below, the determination in step 1301 of FIG. 13 is YE.
S, step 1302, step 1303 is N
When the determination in step 1308 of FIG. 14 is NO, step 1307 of FIG. 14 is executed. As a result, the information reading unit 101 is instructed to start the reproducing operation of the music piece with the music piece number n indicated by the current music piece number 202 stored in the register in the CPU 103.

Details of the crossfade processing shown in the operation flowcharts of FIGS. 13 and 14 will be described below. First, in step 1301 of FIG.
Whether or not the value of the SFL switch-on flag 203 stored in the register in the CPU 103 is 1, that is, S
It is determined whether or not the FL switch (FIG. 1) is turned on (see steps 914 and 915 in FIG. 9). The SFL switch is not turned on, and the determination in step 1301 is NO.
If so, the normal CD access processing is executed in step 1307 of FIG.
The music signal read from the CD via the is output to the D / A converter 106. In this case, if the current song number 202 stored in the register in the CPU 103 is changed by the ten-key pad (switch group 102 in FIG. 1) during playback (step 911 in FIG. 9), the song being played is the song number. Is changed to the song corresponding to. Also, when the STOP switch (switch group 102 in FIG. 1) is pressed, the CP
Playback flag 2 stored in the register in U103
If 01 is reset to 0 (step 907 in FIG. 9,
908), playback of the song is stopped.

If the SFL switch is turned on and the determination in step 1301 is YES, then in step 1302,
The time code value, which is the value of the block 505 indicating the relative time from the beginning of the song, is extracted from the subcode 302 currently read from the CD via the information reading unit 101 (see FIGS. 3 and 5). .

In step 1303, step 1302
It is determined whether or not the time code value extracted in step S3 is stored in the register in the CPU 103 and has reached the value of the nth song fade-out start accent 222 (FIG. 2) corresponding to the song of the song number n that is currently being played. To be judged.

If this determination is NO, it is determined in step 1308 of FIG. 14 whether or not the value of the music RAM access flag 206 stored in the register in the CPU 103 is 1. The value of the music RAM access flag 206 is set to 1 in step 1305 because the determination in step 1303 is YES when the current playback position reaches the value of the nth music fade-out start accent 222.
Is set to.

Therefore, if the current reproduction position has not reached the value of the nth music fade-out start accent 222 and the determination in step 1308 is NO, step 1 in FIG.
A normal CD access process is executed at 307, and the music signal read from the CD via the information reading unit 101 is output to the D / A converter 106.

On the other hand, when the current reproduction position reaches the value of the fade-out start accent 222 for the n-th music,
If the determination in step 1303 is YES, the preparatory processing for loop reproduction shown in steps 1304 to 1306 is executed.

That is, first, in step 1304, the CPU
Current song number 202 stored in the register in 103
From the address {4 × (n−1)} H of the second storage unit 105 corresponding to the currently reproduced music number n, the n-th fade data address corresponding to the music number n is read. The music RAM access address 211 is set in a register in the CPU 103.

Next, in step 1305, the CPU 103
Crossfade time 20 stored in the internal register
7 and the disk access time 208, as the time for reading the music signal from the second storage unit 105, {crossfade time 207 + disk access time 20
8} corresponds to the music RAM access counter 2
Set as 10. In the embodiment of the present invention, the music RAM access counter 210 is decremented every time 1/75 seconds corresponding to one block (= 98 frames) elapse. In step 1305, at the same time as the above operation, the music RAM access flag 206 stored in the register in the CPU 103 is set to 1 in order to indicate that the music signal is being read from the second storage unit 105.
Is set.

Then, in step 1306, the CPU 1
Crossfade time 20 stored in register in 03
7 is set as the crossfade counter 209. The crossfade counter 209 is also decremented every 1/75 seconds. At step 1306, at the same time as the above operation, 1 is set to the crossfade stored in the register in the CPU 103 to indicate that the crossfade process is being executed.

When the current reproduction position reaches the value of the nth music fade-out start accent 222, the above-mentioned step 1
After steps 304 to 1306 are executed, the determination in step 1308 of FIG. 14 is YES, and the following step 1309.
The determination is also YES.

As a result, step 131 described below is performed.
By executing 0 to 1315, the music signal at the end of the currently reproduced song read from the CD via the information reading unit 101 is faded out, and the current reproduction stored in the second storage unit 105 is performed. The music signal at the beginning of the song inside is faded in.

That is, first, in step 1310, the music signal of the designated song is continuously read from the CD via the information reading unit 101. In step 1311, C
Envelope processing is performed on the music signal so that the music signal of the designated music read from D is faded out. This envelope processing is performed by changing the amplitude value of the music signal to the current crossfade counter 2 stored in the register in the CPU 103, which is expressed by the following equation (2).
It is realized as a process of multiplying the coefficient A obtained by dividing the value of 09 by the value of the crossfade time 207 which indicates the total time of the crossfade stored in the register in the CPU 103.

[0156]

## EQU00002 ## A = (value of crossfade counter 209) /
(Value of crossfade time 207) In step 1312, music RAM access address 2
A music signal is read from the address area of the second storage unit 105 indicated by 11. Music RAM access address 2
In step 11, the nth music fade data address corresponding to the currently reproduced music number n is set in 11. Therefore, by the above-described processing, the music signal of the head portion of the music corresponding to the designated music number n is read from the second storage unit 105.

At step 1313, the music RAM access address 211 is updated. In step 1314, envelope processing is executed on the music signal so that the music signal at the beginning of the designated music read from the second storage unit 105 is faded in. In this envelope processing, the current value of the crossfade counter 209 stored in the register in the CPU 103, which is represented by the following formula 3, is added to the CPU 1 as the amplitude value of the music signal.
This is realized as a process of multiplying a coefficient B obtained by subtracting from 1 a ratio obtained by dividing the crossfade time 207 indicating the total time of the crossfade stored in the register in 03.

[0158]

## EQU00003 ## B = 1- (value of crossfade counter 209) / (value of crossfade time 207) In step 1315, the end music signal of the designated song envelope-processed in step 1311 and step 1314 and the designated song Music signal at the beginning is mixed (MIX)
And is output to the D / A converter 106 (FIG. 1).

The above steps 1310 to 1315 are executed in parallel for each channel of the stereo music signal. As described above, the crossfade reproduction of the music signal at the end of the designated song and the music signal at the beginning of the designated song is realized. Especially in this case, crossfade playback
Play position is the nth song Fade out start accent 222
The second storage unit 1 starts when a specific accent position at the end of the designated song with the song number n corresponding to is reached.
In 05, the music signal from the beginning accent position corresponding to the n-th music fade-in start accent 221 among the music signals of the head part of the designated music number n is stored. Therefore, the accent position at the end of the designated song and the accent position at the beginning of the designated song are synchronized and cross-fading is reproduced.

In step 1318, the value of the timer (not shown) is determined, so that when this step is executed for the first time after the SFL switch is turned on, 1 is set from the time when the SFL switch is turned on. Whether or not the time for the block (= 1/75 second) has elapsed, and if this step is not executed for the first time after the SFL switch is turned on, the determination result of this step 1318 is YES. It is determined whether or not the time for one block (= 1/75 second) has elapsed from the time when.

If the determination in step 1318 is NO, the crossfade process of FIG. 13 is terminated. Then, when the crossfade processing shown in the operation flowcharts of FIGS. 13 and 14 is executed next time, step 1310 is executed again.
By executing steps 1315 to 1315, the crossfade processing is performed on the music signal in the current block.

If the determination in step 1318 is YES, the value of the music RAM access counter 210 stored in the register in the CPU 103 is decremented by 1 in step 1319.

Then, the music RAM access counter 21
If the value of 0 is not 0, in step 1321,
It is determined whether the value of the crossfade flag 205 stored in the register in the CPU 103 is 0 or not.

If the determination in step 1321 is YES, the crossfade processing has been completed, so there is no need to decrement the crossfade counter 209, and the crossfade processing of FIG. 13 and FIG. 14 is completed.

If the determination in step 1321 is NO, in step 1322, the value of the crossfade counter 209 stored in the register in the CPU 103 is decremented by -1.

If the value of the crossfade counter 209 does not become 0, the crossfade processing of FIGS. 13 and 14 is ended. Steps 1318 and 131 above
By executing 9, 1321 and 1322,
The block of the music signal to be cross-faded is incremented.

Now, the value of the crossfade counter 209 stored in the register in the CPU 103 is the CPU 103 in step 1306 of FIG. 13 when the music number is designated after the SFL switch is turned on.
Crossfade time 20 stored in the internal register
Set to a value of 7. Therefore, crossfade time 2
When the time corresponding to 07 has elapsed, the value of the crossfade counter 209 becomes 0, and as a result, step 132
2 is executed, then step 1323 is executed, where CP
The value of the crossfade flag 205 stored in the register in U103 is reset to 0. As a result, as shown in FIG. 8, the reading of the music signal of the designated music from the CD is completed.

At the same time, in step 1324,
When an instruction is issued to the information reading unit 101, the information reading unit 101 causes the CPU 103 to read the music signal of the designated song of the song number n indicated by the current song number 202 stored in the register of the CPU 103 on the CD. Seek from the recording position corresponding to {cross fade time 207 + disk access time 208} from the recording position corresponding to the nth music fade-in start accent 221 stored in the register No.

Thereafter, every time the cross-fade process shown in the operation flowcharts of FIGS. 13 and 14 is executed, the determination in step 1309 becomes NO,
In step 1316, the music RAM access address 21
From the address area of the second storage unit 105 indicated by 1, the music signal of the head portion of the designated music corresponding to the music number n is continuously read. Then, the envelope processing described above (step 1314) is not executed on the music signal, and the music signal is directly output to the D / A converter 106 (FIG. 1). Then, in step 1317, the music RAM access address 211 is updated, and then the above-mentioned step 1318 is executed. Note that step 131
The process of 6 is executed in parallel for each channel of the stereo music signal.

In this way, while the seek of the music signal of the designated tune of the tune number n is performed on the CD, the second storage unit 1
From 05, the reading of the music signal of the head portion of the designated song with the song number n is continued. In this case, since the crossfade process has been completed, the amplitude value of the music signal read from the second storage unit 105 is equal to the amplitude value of the music signal originally recorded on the CD. There is.

Now, when the tune number n is specified after the SFL switch is turned on, the value of the crossfade counter 209 stored in the register in the CPU 103 is set to the above-mentioned step 1306 in FIG. Thus, the value of the crossfade time 207 stored in the register in the CPU 103 is set. Also, C
The value of the music RAM access counter 210 stored in the register in the PU 103 corresponds to {crossfade time 207 + disk access time 208} stored in the register in the CPU 103 in step 1305 of FIG. 13 described above. It is set to a value. Therefore, when the time corresponding to the value of the crossfade time 207 elapses and then the time corresponding to the value of the disk access time 208 elapses, the value of the music RAM access counter 210 becomes 0. As a result, step 13
After execution of step 19, step 1320 is executed, where the value of the music RAM access flag 206 is reset to 0. As a result, as shown in FIG. 8, the reading of the music signal of the designated music corresponding to the music number n is performed by the second storage unit 10.
The reading from 5 is switched to the reading from CD. <Other Embodiments> In the embodiment described above, the crossfade time 207 may be set to 0 and only the music signal of the beginning portion of each music corresponding to the disk access time 208 may be stored in the storage unit 104. For example, when playing back a loop, it is possible to instantly loop a song without waiting for disk access and by synchronizing accents.

In the above embodiment, the case where the music signal recorded on the CD is reproduced is explained.
The present invention is not limited to this. For example, in addition to CDs, digital audio tape recorders (DAT), mini disc players (MD), laser disc players (L
D), etc., can be applied to a device for reproducing digital information such as various music signals or video signals. In this case, not only the accent of the music signal but also the chord progression of the music, the change of the scene of the video, and the like may be synchronized.

Furthermore, the loop reproduction section does not have to be from the beginning to the end of the song, but may be from a specific part of the song to another specific part, or a part extending over a plurality of songs.

In addition, in the above-described embodiment, the fade-in start accent and the fade-out start accent of each music piece are configured to be extracted by the accent data writing process. However, these are, for example, CDs corresponding to each music piece. May be pre-written in the sub-code 302 and read and used.

[0175]

As described above, according to the present invention, when the recorded information is repeatedly reproduced, the reproduced information is not suddenly interrupted, and it is possible to quickly shift from the end portion to the beginning portion of the repeated area.

In this case, in particular, since the end position and the start position of the repeated area are both synchronized with the period information included in the recorded information, for example, the accent timing of the music signal, the periodic state of the accent or the like in the recorded information is destroyed. Without losing the feeling that I was concentrated on the song,
It becomes possible to perform loop reproduction.

Further, since the recorded information at the end of the repeated area and the recorded information at the beginning of the repeated area are cross-faded and reproduced, it is possible to add an aurally or visually pleasing effect.

Further, in the case of the structure in which the cross fading is not performed, it becomes possible to instantaneously repeat the operation without waiting time corresponding to the access time to the recording medium.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of a register.

FIG. 3 is a configuration diagram of a frame in a CD.

[Fig. 4] Subcode on the CD (98 frame unit)
It is a block diagram of.

FIG. 5: Q channel data on CD (mode 000
It is a block diagram of 1).

FIG. 6 is a data format diagram of a first storage unit.

FIG. 7 is a data format diagram of a second storage unit.

FIG. 8 is an explanatory diagram of an operation of synchronized crossfade reproduction.

FIG. 9 is an operation flowchart of a switch loading process.

FIG. 10 is an operation flowchart (1) of accent data writing processing.

FIG. 11 is an operation flowchart (2) of accent data writing processing.

FIG. 12 is an operation flowchart of a fade data writing process.

FIG. 13 is an operation flowchart (part 1) of crossfade processing.

FIG. 14 is an operation flowchart (2) of the crossfade processing.

FIG. 15 is an explanatory diagram (part 1) of the operation of detecting the accent position.

FIG. 16 is an explanatory diagram (No. 2) of the operation of detecting the accent position.

[Explanation of symbols]

 101 Information Reading Unit 102 Switch Group 103 CPU 104 First Storage Unit (Accent RAM) 105 Second Storage Unit (Music RAM) 106 D / A Converter 107 Amplifier 108 Speaker 201 Now Playing Flag 202 Current Song Number 203 SFL Switch On flag 204 SFL Song number selection flag 205 Crossfade flag 206 Music RAM access flag 207 Crossfade time 208 Disk access time 209 Crossfade counter 210 Music RAM access counter 211 Music RAM access address 212 Music RAM unused address 213 Accent RAM book Included address 214 Accent RAM read address 215 Accent RAM unused address 216 Accent start position 217 Accent end position Position 218 Accent area number 219 Previous accent position 220 Current accent position 221 Fade-in start accent 222 Fade-out start accent 301 Sync signal 302 Subcode 303 L channel music signal 304, 306 Error correction code 305 R channel music signal 401 Subcode sync 402 song Head data 403 Control code 404 Mode 405 Q channel data 406 Error correction code 501 Music number 502 Index 503, 507 minutes 504, 508 seconds 505, 509 blocks

Claims (3)

[Claims] 1. A recording information reading unit for sequentially reading the recording information recorded on a recording medium, and a recording information read by the recording information reading unit, which is a recording position corresponding to the beginning and the end of a repeatedly reproduced section. And a repetitive recording position acquisition means for acquiring the first recording position and the second recording position in synchronization with the period information included in the recording information, and a predetermined part of the recording information starting from the first recording position. Partial recording information group storage means for storing a partial recording information group, and when the recording information is being reproduced via the recording information reading means, from the time when the reproduction position reaches the second recording position, The recording information read out by the recording information reading means is output while fading out, and at the same time, it is stored in the partial recording information group storage means. Cross-fade output means for reading out the record information of the partial record information group while fading in, mixing the record information with the record information to be output while fading out, and outputting the cross-fade output means; After the value of the record information output while being faded out from the fade output means becomes 0, the crossfade output means outputs the remaining record information of the partial record information group stored in the partial record information group storage means. A read position search means for searching on the recording medium a read position where the record information following the partial record information group is recorded in the output period; and the crossfade output means for the partial record information group. When the output of the record information of is finished, the read position is retrieved by the record information reading means. An instruction means for instructing the reading of the record information from the read position searched by the step, and an output of the crossfade output means during a period in which the crossfade output means is outputting the record information of the partial record information group. An information reproducing apparatus comprising: an output switching unit that selects and outputs the output of the recording information reading unit during other periods. 2. A recording information reading means for sequentially reading the recording information recorded on a recording medium, and a recording information read by the recording information reading means, which is a recording position corresponding to the beginning and the end of a repeatedly reproduced section. And a repetitive recording position acquisition means for acquiring the first recording position and the second recording position in synchronization with the period information included in the recording information, and a predetermined part of the recording information starting from the first recording position. Partial recording information group storage means for storing a partial recording information group, and when the recording information is being reproduced via the recording information reading means, from the time when the reproduction position reaches the second recording position, A partial record information group output means for outputting record information of the partial record information group stored in the partial record information group storage means; and the partial record information group output means A read position retrieving means for retrieving, on the recording medium, a read position at which record information following the partial record information group is recorded during the period in which the record information of the minute record information group is being output; Instructing means for instructing the recording information reading means to read the recording information from the reading position searched by the reading position searching means when the information group outputting means finishes outputting the recording information of the partial recording information group. And, while the partial record information group output unit is outputting the record information of the partial record information group, the output of the partial record information group output unit is selected and output, and in other periods, the record information is output. An information reproducing apparatus comprising: an output switching unit that selects and outputs an output of the reading unit. 3. The information reproducing apparatus according to claim 1, wherein the record information is a music signal, and the period information included in the record information is accent information.