JPH06202623A - Score display device - Google Patents

Abstract

PURPOSE:To display score image data in synchronism with the musical sound reproduced from a recording medium by utilizing software on the recording medium which is already on sale. CONSTITUTION:A musical instrument control part 115 compares the absolute time data outputted sequentially from a CD control part 102 with absolute time data by score numbers and screen numbers stored in the header part on a memory card 121 in sequence to read score data on screens synchronized with CD reproduction out of the memory card 121 and display them at a score display part 124. When a user depresses the '+' key of a musical instrument operation part 116, a musical instrument control part 115 advances the screen number by one, reads corresponding score data out of the memory card 121 and displays the data at the score display part 124, and also reads corresponding absolute time data out of the header part on the memory card 121 and sends a program search indication to the CD control part 102.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical score display device.

[0002]

2. Description of the Related Art An apparatus for displaying a score image in synchronization with the reproduction of music is known. In such an apparatus, for example, musical score image data corresponding to a music piece to be reproduced is recorded on a recording medium such as a compact disc (CD-G) or a laser disc (LD) having a graphics display function. When such a recording medium is reproduced, the score image data is displayed in synchronization with the reproduction of the music sound.

[0003]

However, in the above-mentioned conventional example, since the score image data is recorded on the same recording medium, in order to display the score image data in synchronization with the reproduction of the music sound, the score image data is displayed. There is a problem that a recording medium on which image data is recorded has to be newly released, and the software of the already released recording medium cannot be used.

An object of the present invention is to make it possible to display music score image data in synchronism with music sound reproduced from the recording medium while utilizing the software of the recording medium already on sale, and to fast-forward. And so on.

[0005]

According to the present invention, first, a music sound signal recorded on a recording medium such as a compact disc is reproduced, and time data such as absolute time data indicating the reproduction time point is reproduced at each reproduction time point. Output function,
It has a music reproducing means such as a compact disc player having a function of cueing out a music sound signal corresponding to the time data designated from the outside.

Next, a score data storage means for storing score data showing an image image of the score at each progress position corresponding to each of a plurality of progress positions of the score display for each score, each screen number in the score, etc. Have.

Further, it has advance position-by-progress time data storage means for storing the time data of the music sound signal to be reproduced by the music reproducing means at each of the advancing positions, corresponding to each of the advancing positions of the score display.

Further, it has a score display means for displaying a score image based on the score data. Then, the time data sequentially output from the music reproducing means corresponding to the music sound signal reproduced by the music reproducing means is sequentially compared with the time data on the time data storage means for each traveling position, so that It has first control means for reading out the score data of the proceeding position corresponding to the output time data from the score data storage means and displaying it on the score display means.

In addition to the above-mentioned configuration of the present invention, the following advancing position changing means and second control means may be further provided. That is, first, the proceeding position changing means M causes the user to change the proceeding position of the score display.

Next, the second control means reads out the musical score data of the proceeding position changed by the proceeding position changing means from the musical score data storing means and displays it on the musical score displaying means, and at the same time, the musical piece reproducing means operates. The time data of the music sound signal to be reproduced is read from the progress position-by-time data storage means, and the music sound signal corresponding to the read time data is cued to the music reproduction means and reproduced.

[0011]

The first control means sequentially reproduces the music sound signal in the music reproducing means by sequentially comparing the time data sequentially output from the music reproducing means with the time data stored in the time data memory for each traveling position. The synchronized score data can be read from the score data storage means and displayed on the score display means.

In this case, since the time data is always compared, it is possible to synchronize the score display with an operation such as fast forward or fast rewind of the music reproducing means. Further, when the user is allowed to change the proceeding position of the score display by the proceeding position changing means, the second control means stores time data corresponding to the changed proceeding position from the proceeding position every hour data storage means. It is possible to cope with any change in the score display by reading out and causing the music reproducing means to perform the cue reproduction.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. <Structure of Embodiment> FIG. 1 is an overall structure of an embodiment of the present invention, in which a score display function is realized as a function of an electronic musical instrument having a CD player reproducing function.

Reference numeral 104 denotes a CD, which is set in a holder part (not shown). It should be noted that the CD 104 may be recorded with music software generally distributed in the market.

The TOC memory 100 is a memory for storing TOC (Table of Contents) data in the lead-in area which is automatically read when the CD 104 is set.

The CD operating section 101 is a reproduction switch PLA.
Y (also used as pause switch), stop switch STOP, fast-forward switch FF, "0" for designating song number ~
The numeric keypad of "9" or the like is used, and is operated by the user to control the progress of CD reproduction when performing normal CD reproduction without displaying the musical score.

The CD control unit 102 is, for example, a microprocessor and controls the reproduction of the music sound of the CD 104 as a whole. The CD control unit 102 includes a sub chord signal processing circuit 109, a musical instrument control unit 115, and a TOC memory 1.
Various data is exchanged with 00, etc. Also, CD
The control unit 102 controls the drive unit 1 when driving the CD 104.
A drive control signal is output to the switch 03.

The drive unit 103 controls the number of rotations of a disk motor that drives the CD 104 to rotate,
Drive control is performed so that the linear velocity of each track of No. 4 becomes constant. The drive unit 103 performs focus servo, tracking servo, and the like of the pickup 105 that irradiates a track of the CD 104 with a laser beam.

A projection called a pit is formed on the surface of the CD 104 irradiated with the laser beam, and a PCM signal (Palse Code Modulation signal) is recorded by the pit. And the pickup 105
Detects the presence or absence of pits based on the amount of reflected light of the emitted laser beam, and outputs an electric signal corresponding to the presence or absence of pits and the length thereof to the demodulation circuit 108.

The demodulation circuit 108 detects a frame synchronization signal from the electric signal output from the pickup 105 to identify the delimiter of each symbol word, and further is EFM modulated (Eight to Fourteen Modulation) in each frame. The bit symbol word is EFM demodulated and converted into an 8-bit symbol word. Then, the demodulation circuit 108 outputs the symbol word including the audio data to the audio data signal processing circuit 110 and the symbol word including the subcode to the subcode signal processing circuit 109 among the EFM demodulated symbol words.

The audio data signal processing circuit 110 includes
While capturing the input audio data, error correction processing and de-interleave processing are performed based on the Reed-Solomon code, and 1
Each sample of 6-bit digital audio data is restored. And, this digital audio data is D
Output to the / A converter 111.

The D / A converter 111 converts the input digital audio data into an analog audio signal and outputs it. This analog audio signal is an LPF with a cutoff frequency that is half the sampling frequency.
It is given to the amplifier 113 and the speaker 114 via the (low-pass filter) 112, and is emitted to the outside.

The subcode signal processing circuit 109 performs error detection and correction processing and deinterleaving processing on the 8-bit subcode to restore the subcode. Then, the subcode signal processing circuit 109 outputs the data of the restored subcode to the CD control unit 102.

The CD control unit 102 controls the CD by the user when the user plays a normal CD without displaying the musical score.
Based on the operation state of the operation unit 101 and the subcode input from the subcode signal processing circuit 109 when the CD 104 is set in the holder or during the reproduction of the CD 104, each progress operation of the CD reproduction is controlled.

Further, when the user performs the CD reproducing operation while displaying the musical score, the CD control unit 102 receives the absolute time data from the musical instrument control unit 115 based on the operation of the musical instrument operation unit 116 described later by the user. When received, the cue reproduction is performed from the music position corresponding to the absolute time data (minutes, seconds, frames), and when the reproduction stop instruction is received from the musical instrument control unit 115, the CD reproduction is stopped.

Further, the CD control unit 102 extracts absolute time data (minutes, seconds, frames) from a bit called Q bit described later in the subcode input from the subcode signal processing circuit 109 during reproduction, Also, during the song /
Bits called P bits, which represent the intervals between songs by a value of "0" or "1", are extracted and sequentially output to the musical instrument control unit 115.

As shown in the figure, the musical instrument operating section 116 has a ten-key for designating the music number of a musical score, a SET key for confirming the music number, a "+" key for advancing the display of the musical score, And a STOP key for stopping the display of the musical score and the CD reproduction synchronized with it. Also,
Although not shown in particular, the musical instrument operating section 116 also has various setting keys for setting a tone color and other parameters when playing a musical instrument.

The musical instrument control unit 115 is, for example, a microprocessor, reads out the musical score data stored in the memory card 121 connected via the connector 120 based on the operation of the musical instrument operating unit 116 by the user, and outputs the musical score data. In addition to executing the control operation of transferring to the display register 122 and causing the display driver 123 to display the score on the score display section 124, the CD control section 102 is also instructed to perform absolute time data synchronized with the display of the score data or an instruction to stop playing the CD 104. Output.

Further, in parallel with the above-mentioned control operation, the musical instrument control section 115 generates musical tone waveform data based on the user's performance operation of the keyboard 117, and outputs it from the speaker 119 via the sound system 118. The control operation as a normal electronic keyboard instrument is also executed.

Next, in the sub-code, the Q bit in which absolute time data is stored and the P bit in which data representing during / between songs are stored will be described. CD 104 now
In the above, the digital data is recorded in units called frames, and in each frame, in addition to audio data which is a CD reproduced sound, control data called a subcode consisting of 8 bits per frame is stored.

An 8-bit sub-code per frame is assembled by using 98 frames as one sub-coding frame. In this 98-frame, each 8-bit sub-code of the first frame and the second frame is as shown in FIG. It is a sync pattern for the subcode signal processing circuit 109 to recognize one subcoding frame. Then, meaningful data is expressed by the subcode group consisting of (8 bits × 96 frames) in the third frame to the 98th frame.

Here, as information particularly relevant to the present invention, bits called bits P and Q are stored in the subcode of each frame. Now, as shown in FIG. 3, the functions of the bits Q and P will be described by taking a CD 104 containing three pieces of music as an example.

On the CD 104, various data are recorded from the inner circumference to the outer circumference of the CD 104 as shown in FIG. 3, and the innermost area (area having a diameter of 46 mm to 50 mm) is called a lead-in area. The subcode in this area contains information called TOC (Table of Contents), which corresponds to the table of contents of all the songs recorded on one CD. This information is recorded when the CD 104 is set in the holder. The data is read into the TOC memory 100 and the C
Based on the operation of the D operation unit 101, it is used for control of CD song selection and the like. Since this information is not particularly relevant to the present invention, its detailed description is omitted.

In the CD 104, an area called a program area exists outside the lead-in area as shown in FIG. In this program area, audio data is recorded in frame units, and bits P and Q in the subcode in each frame are recorded as shown in FIG.

The bit P is data indicating the inter-song and the mid-song, and is "1" if the frame corresponds to the inter-song and no audio data exists, and "0" if the frame corresponds to the middle of the music and audio data exists. Is set to ".

Various time information is recorded in the bit Q. As described above, 98 frames (the time for one frame is 136.05 μsec) are treated as one sub-coating frame. Therefore, the unit of time (136.05 μsec × 98) for one sub-coating frame, that is, 1 /
Time information in units of 75 seconds is represented by bit Q.

FIG. 2 is a diagram showing the data structure of bit Q in the program area per subcoding frame. In FIG. 2, Q ₁ , Q ₂ , ... Q
₉₆ corresponds to each bit Q of the third frame, the fourth frame, ... The 98th frame in one sub-coding frame.

Firstly, the flag of the Q ₁ to Q _4, the number of channels and the audio data is used for identification of the presence or absence of emphasis, the 4 bits of the next Q ₅ ~Q ₈ "000
It is set to 1 ".

The next 8 bits of Q _{9 to} Q ₁₆ indicate a track number (song number), and the next 8 bits of Q _{17 to} Q ₂₄ are an index, which are further subdivided track numbers. .

The following three 8 bits are relative time data, and the elapsed time from the start time of each music is represented by minutes, seconds and frame numbers, and the display is updated every 1/75 seconds.

The next 8 bits are all 0s. The following three 8 bits are absolute time data, and the elapsed time from the start time of the program area to the time of the sub-coating frame is represented by minute, second and frame number, and 1
The display is updated every / 75 seconds. Here, in the sub-code, as described above, one sub-coding frame is formed by 98 frames, and since this one sub-coding frame corresponds to 1/75 second, a series of 75 sub-coding frames. Data is the same second data. The above-mentioned frame number is obtained by sequentially assigning numbers from 0 to 74 to the 75 sub-coding frames in the same second data.

The last 16 bits are the error detection code (CRC
C code). The present embodiment is characterized in that the above-mentioned absolute time data (minutes, seconds, frames) is used to synchronize the score data display and the CD reproduction.

Next, the data format on the memory card 121 for storing the score data will be described.
As shown in FIG. 4, the data on the memory card has a header portion, and subsequently, music score data of a bitmap showing a score image image for a plurality of screens is stored for each music piece. The score data for one screen displays the score for several measures.

As shown in FIG. 5, the header portion includes a score number (song number), a screen number in the score indicated by the score number, and a screen corresponding to the screen number in the score indicated by the score number, respectively. The start address of the score data (FIG. 4) and the start absolute time data of the CD corresponding to the screen (minutes,
It is composed of a plurality of header data composed of seconds and frames). <Operation of Embodiment> The operation of the embodiment having the above configuration will be described below.

When performing a normal CD reproduction without displaying the musical score, the user operates the CD 1 by operating the CD operating unit 101.
A reproduction instruction of 04 is issued. When performing the CD reproducing operation while displaying the score, the user inputs the score number (song number) with the ten keys of the musical instrument operating section 116 and finally presses the SET key.

As a result, the musical instrument control section 115 executes the control program shown in the operation flowchart of FIG. In FIG. 6, first, in step S601, 1 is assigned to the screen number register M.

Next, in step S602, it is determined whether or not the number is entered using the ten-key pad. When the user presses the SET key after performing the numerical input with the ten-key pad, the determination in step S602 becomes YES, and the numerical value is assigned to the musical score number register N in the next step S603.

On the other hand, if the user presses only the SET key with the numeric keypad without entering the number, step S60
The determination of 2 is NO, and in step S604, the value "1" indicating the first music piece is assigned to the musical score number register N.

Next, in step S605, the header portion stored in the memory card 121 is accessed and corresponds to the score number indicated by the score number register N and the screen number = 1 indicated by the screen number register M. The absolute time data of the address to be read is read out, and a cue reproduction instruction is output to the CD control unit 102. This makes the CD
The control unit 102 locates the beginning of the music piece corresponding to the instructed absolute time data and starts the reproduction.

In step S606, the memory card 12
The header section stored in 1 is accessed, and the leading address of the score data corresponding to the score number indicated by the score number register N and corresponding to the screen number = 1 indicated by the screen number register M is read out. Then, the musical score data for one screen is sequentially read from the address on the memory card 121 indicated by this address and transferred to the display register 122.

As a result, the display driver 123 displays the score data for one screen held in the display register 122 on the score display section 124. As described above, the score data for one screen displays the score for several bars.

Subsequently, the musical instrument control unit 115 repeatedly executes the processing of steps S607 to S615.
First, in step S607, the absolute time data value of the current reproduction timing sequentially transferred from the CD control unit 102 is next to the screen number indicated by the screen number register M in the score number indicated by the score number register N. It is determined whether or not the value of the absolute time data stored in the header section of the memory card 121 has been reached corresponding to the screen number.

If this determination is NO, step S610,
The determination of step S607 is repeated through the determinations of S614 and S615. Then, in the repetition of the above-described processing, the value of the absolute time data of the current reproduction timing transferred from the CD control unit 102 corresponds to the screen number indicated by the screen number register M in the score number indicated by the score number register N. When the value of the absolute time data stored in the header section of the memory card 121 corresponding to the next screen number is reached and the determination in step S607 is NO, the processes of steps S608 and S609 are executed.

At step S608, the value of the screen number register M is incremented by one. Then, in step S609,
The header section stored in the memory card 121 is accessed, and the beginning of the score data of the address corresponding to the score number indicated by the score number register N and corresponding to the next screen number indicated by the updated screen number register M The address is read. Then, the musical score data for one screen is sequentially read from the address on the memory card 121 indicated by this address and transferred to the display register 122.

As a result, the display driver 123 displays the score data of the next screen held in the display register 122 on the score display section 124. In this way, the screen display of the musical score can be sequentially updated in synchronization with the CD reproduction.

Next, in the repetition of the processing of steps S607 to S615, the user selects "+" on the musical instrument operating section 116.
If the key is pressed, the determination in step S610 becomes YES. Then, as in steps S608 and S609, the value of the screen number register M is incremented by 1 in step S611.
Then, in step S612, the score data corresponding to the screen number advanced by one is read to the display register 122, and the display driver 123 newly displays it on the score display unit 124.

Further, in step S613, the header section stored in the memory card 121 is accessed, and the next screen number indicated by the updated screen number register M corresponding to the score number indicated by the score number register N is accessed. The absolute time data of the address corresponding to is read out, and a cue reproduction instruction is output to the CD control unit 102. As a result, the CD control unit 102 locates and plays back the playback position corresponding to the updated score screen.

After that, the process returns to the repetition of the processes of steps S607 to S615 through step S614. In this way, the user can sequentially advance the display of the musical score by one screen by the "+" key and synchronize the CD reproduction with it.

Subsequently, in the repetition of the processing of steps S607 to S615, when the user operates the fast-forward switch FF of the CD operating section 101 to fast-forward the CD reproduction, thereafter, the CD control section 102 controls the musical instrument control section. 115
Value of the absolute time data sent to the screen number register M
It becomes a value corresponding to the screen number after the screen number shown by.

As a result, steps S607 → S608 →
By repeating the processes of S609 to S615 until the determination of step S607 becomes NO, the score display screens are switched one after another, and the screen number register M of the screen number register M is made to correspond to the value of the absolute time data from the CD control unit 102. The value is updated, and the score display screen synchronized with the fast forward of the CD reproduction is displayed.

Further, in the repetition of the processing of steps S607 to S615, when the CD reproduction reaches the end of the music, C
When the value “1” indicating the music interval is transferred from the D control unit 102 as the data of the bit P described above, the determination in step S615 is YES. As a result, in step S616, a CD reproduction stop instruction is output to the CD control unit 102, and the contents of the display register 122 are cleared. As a result, the CD control unit 102 stops the CD reproduction, and the score display on the score display unit 124 is cleared.

Further, in the repetition of the processing of steps S607 to S615, the user operates the STO of the musical instrument operating section 116.
When the P key is pressed, the determination in step S614 is YES. Also in this case, as in the case described above, the process of step S616 for stopping the CD reproduction and clearing the score display is executed. <Other Embodiments> In the embodiment described above, the score display is
Although the present invention has a configuration for realizing the function of advancing screen by screen, the present invention is not limited to this, and the function of returning the score display one screen at a time, the function of advancing or returning the score display by a plurality of screens, It is also possible to have a function of changing to an arbitrary designated screen, a function of changing the display of the score to another score number (song number), and the like.

In the above embodiment, the absolute time data read from the CD 104 at the time of playing the CD is used to synchronize the display of the musical score and the CD playing, but the relative time data may be used.

Further, according to the present invention, in addition to a CD, a CD-ROM, C
DI, DAT (Digital Audio Tape), DCC
It is also applicable to recording media such as (digital compact cassette), MD (mini disk), LD (laser disk).

Further, as the medium for storing the header portion and the musical score data, various storage media other than the memory card can be used.

[0066]

According to the present invention, the music data is reproduced by the music reproducing means by sequentially comparing the time data sequentially output from the music reproducing means with the time data stored in the time data memory for each traveling position. It becomes possible to display the score data synchronized with.

In this case, since the time data is always compared, it is possible to synchronize the score display with an operation such as fast forward or fast rewind of the music reproducing means. Further, when the user is allowed to change the proceeding position of the score display by the proceeding position changing means, it becomes possible to synchronize the display of the score and the reproduction of the music sound signal with the changed proceeding position.

Further, according to the present invention, by providing the musical score data storage means and the moving position hourly data storage means by, for example, a memory card, the software of the recording medium on which the music sound signal which has been conventionally sold is recorded. It is possible to display the score image data in synchronism with the music sound reproduced from the recording medium while being utilized as it is.

[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 bit Q in a program area.

FIG. 3 is a diagram showing the recorded contents of a CD.

FIG. 4 is a diagram showing a data format on a memory card.

FIG. 5 is a diagram showing a data format of a header part.

FIG. 6 is an operation flowchart of the embodiment of the present invention.

[Explanation of symbols]

 100 TOC memory 101 CD operation unit 102 CD control unit 103 Servo control circuit 103 Disk motor 103 Pickup feed motor 104 CD 105 Optical pickup 108 Demodulation circuit 109 Subcode signal processing circuit 110 Audio data signal processing circuit 111 D / A converter 112 Low pass Filter (LPF) 113 Amplifier 114, 119 Speaker 115 Instrument control section 116 Instrument operation section 118 Tone generator 121 Automatic performance memory

Claims (2)

[Claims] 1. A function of reproducing a music sound signal recorded on a recording medium and outputting time data indicating the reproduction time point at each reproduction time point, and a music sound signal corresponding to the time data designated externally. A music reproducing means having a function of cueing a musical score; a musical score data storing means for storing musical score data showing an image image of a musical score at each of the progress positions, corresponding to each of the plurality of progress positions of the musical score display; Corresponding to each of the multiple progression position of the score display,
Advancing position time data storage means for storing time data of the music sound signal to be reproduced by the music reproducing means at each advancing position; score display means for displaying a score image based on the score data; By sequentially comparing the time data sequentially output from the music reproducing means in correspondence with the music sound signal reproduced by the reproducing means with the time data stored in the time data storing means for each proceeding position, the music reproducing means A first control means for reading out the score data at the proceeding position corresponding to the time data sequentially output from the score data storage means and displaying the score data on the score display means. 2. An advancing position changing means for allowing a user to change the advancing position of the score display, and the musical score data of the advancing position changed by the advancing position changing means is read out from the musical score data storing means to the musical score displaying means. While displaying the time data of the music sound signal to be reproduced by the music reproducing means at the advancing position, the time data for each advancing position is read from the time data storing means and corresponds to the read time data for the music reproducing means. A musical score display device, further comprising: a second control unit that causes a music sound signal to be located and reproduced.