JPH06214565A - Recording medium reproducing device - Google Patents

Abstract

PURPOSE:To provide the recording medium reproducing device having a function which generates a rhythm pattern synchronized with the playing speed of music recorded on a recording medium for an optional period including a period before the start of the music harmonizing with the start of music when the music recorded on the recording medium begins to be reproduced. CONSTITUTION:The recording medium reproducing device is equipped with a reproducing means which reproduces the music recorded on the recording medium 1; and a rhythm pattern setting means 21 sets the tempo and timing that the music has as parameters and a storage means 24 stores parameters, music by music. A rhythm pattern generating means 5 generates an acoustic rhythm pattern on the basis of the parameters and a repetition frequency setting means 23 sets the frequency of repetition of the rhythm pattern. When selected music on the recording medium is reproduced by a reproducing means, control means 10 and 21 control a rhythm pattern generating means 25 so that the rhythm pattern is generated as many times as the frequency of generation before the selected music is started and then synchronized with and made continuous to the start of the music.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the performance of a musical composition (program or track) recorded on a recording medium such as a disk or tape at the start of the musical composition which is the content of the program. The present invention relates to a recording medium reproducing apparatus having a function of generating a rhythm pattern synchronized with speed.

[0002]

2. Description of the Related Art CDs (Compact Discs) and MDs are used as media for digitally recording audio signals.
Disc-shaped recording medium such as (mini disc) or D
There are tape-shaped recording media such as AT (digital audio tape) and DCC (digital compact cassette). Play the desired song from such a recording medium,
When playing an instrument or singing according to this playback sound,
In the case where the music does not have the prelude part, it is convenient for the performer and the like that the rhythm pattern having the same tempo as the music has been generated before the start of the music.

A metronome is known as a typical device for generating a rhythm pattern. After adjusting the tempo (cycle) in advance and starting the metronome from a desired timing, the metronome automatically continues to generate a rhythm pattern with a fixed cycle thereafter. For this reason, it has been used for a long time during performance practice and singing practice.

[0004]

However, there are some difficulties in using this metronome when reproducing music from a recording medium such as a disk or tape. For example, in order to match the tempo and timing of the metronome while listening to the playback sound, a certain amount of rhythmic feeling is required,
It is not something that anyone can easily do. Even so, if you get used to it to some extent, you can even adjust the tempo of the metronome while playing the desired song in advance.

However, it is surprisingly difficult to use the metronome whose tempo is adjusted in this way in synchronization with the timing of the music to be reproduced. This is because generally, even if the key operation for shifting the player from the pause state to the play state is performed, there is a certain amount of blank time until the beginning of the music is actually played, which causes the timing deviation. Because it will be. The blank time is divided into a silent portion that is intentionally added during recording on the recording medium and a search time for a target address (position) by the player during reproduction. In many cases, the former is several hundreds ms or more, and in the latter, in the case of a CD player, for example, a disc rotation wait time causes a discrepancy at each reproduction, resulting in a large audible timing deviation. Also,
In the case of a metronome, it is practically difficult to stop the generation of a rhythm pattern at the start of a music piece to be played or to attenuate the volume.

The present invention solves such a problem, and when a music recorded on a recording medium is reproduced, the rhythm pattern synchronized with the performance speed of the music is synchronized with the start of the music before the start. It is an object of the present invention to provide a recording medium reproducing device having a function that occurs for any period including the above.

[0007]

According to the present invention, a reproducing means for reproducing a music piece recorded on a disc or a tape-shaped recording medium, and a tempo and a timing of the music piece in the music piece are set as parameters for each music piece. Rhythm pattern setting means for storing, rhythm pattern generating means for generating an acoustic rhythm pattern based on the parameters, repetition number setting means for setting the number of times the rhythm pattern is generated,
When a song is selected from the recording medium and played back by the playback means, the rhythm pattern is added for the number of times of occurrence so as to be continuous in synchronization with the song start of the selected song before the song starts. It is characterized by comprising the control means described above.

In this case, the rhythm pattern setting means includes rhythm input means for externally inputting the rhythm timing of the music being reproduced by the reproducing means, tempo detecting means for detecting the tempo from the input rhythm timing, The tempo and the timing may be composed of parameter storage means for storing as a parameter for each music, and the control content of the control means may be such that the rhythm pattern is stopped or the volume is lowered at the time when the music starts or in the vicinity thereof. You can also add points.

[0009]

When the disc or tape recording medium is reproduced, a rhythm pattern matching the rhythm progression of the selected music is created and added before reproduction of the selected music. By doing so, it is possible to generate an arbitrary rhythm pattern suitable for a music piece to be reproduced, with a convenience not provided by the conventional metronome.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment in which the present invention is applied to a CD player. In this figure, 1 is a compact disc (CD), 2 is a spindle motor for rotating the disc 1, 3 is an optical head for optically reading information from the disc 1, and 4 is the optical head 3 for the disc 1.
Is a sled feed motor that moves in the radial direction. The output of the optical head 3 is amplified by the radio frequency (RF) amplifier 5, and the amplified output is input to the servo signal processing unit 6. The servo signal processing unit 6 performs tracking control and focus control of the optical head 3 and sled feed control that drives the motor 4 by detecting a tracking error from the input amplified signal. The output of the amplifier 5 is also input to the digital signal processing unit 7, where it is demodulated into digital data. Of the demodulated data, audio data is converted into an analog audio signal through the digital filter 8 and the D / A converter 9. Of the digital data, control data is input to the system controller 10 and used for various controls. The configuration up to this point is provided as standard on a normal CD player.

In this embodiment, in addition to the above basic structure,
A rhythm pattern generation circuit 20 surrounded by a broken line frame is added. The rhythm pattern generation circuit 20 includes a rhythm pattern output timing calculation / control means 21, a rhythm input means 22, a repetition number setting means 23, a storage means 24, a rhythm pattern generation means 25, a display 26, a parameter confirmation means 27, and timing. A shift amount fine adjustment means 28 is included. According to one method of the present invention, a rhythm pattern setting means for storing the tempo and timing of a music as a parameter for each music can be realized by using the rhythm pattern output timing calculation / control means 21. According to another method of the present invention, the rhythm pattern setting means is
Rhythm input means 22 for externally inputting the rhythm timing of the music being reproduced by the reproduction means, tempo detection means for detecting the tempo from the input rhythm timing, and these tempo and timing are stored as parameters for each music. It can be configured with the parameter storage means 24. In this case, the tempo detecting means is realized by using the function of the rhythm pattern output timing calculating / controlling means 21.

The rhythm pattern output timing calculation / control means 21 stores the timing of the rhythm input from the rhythm input means 22 as the reproduction address of the CD based on the reproduction address information from the system controller 10, and then inputs the rhythm. The average time interval ΔP is calculated from each of the time intervals, and the address information as on the CD at the beginning of the rhythm is calculated, and a rhythm pattern is generated using these as parameters. The repetition number setting means 23 is for setting the number of times N the rhythm pattern is generated.
The storage means 24 stores these parameters as, ΔP and N as necessary. Rhythm pattern generating means 2
5 acoustically generates a rhythm pattern. Display 26
Performs various displays as shown in FIG. The parameter confirmation means 27 is for extracting the input confirmation signal of the parameter to the outside. The timing shift amount fine adjustment means 28 is used for fine adjustment of the timing deviation of the rhythm input.

FIG. 2 is an external perspective view of a CD player having such a structure. In this figure, 30 is a CD player main body, and 40 is an input / output operation section.
The operation unit 40 includes a rhythm input pad 41, a countdown number set key 42, a countdown number display 43, a rhythm display (LED) 44, a rhythm sounder 45, a timing shift amount display 46, and an input confirmation key (enter key). 47 and a timing shift amount fine adjustment key 48 are included. The indicators 43, 44 and 46 of FIG. 2 are the indicators 26 of FIG.
2, and the rhythm sounding body 45 of FIG. 2 corresponds to the rhythm pattern generating means 25 of FIG. The operation will be described below.

(1) Setting of Tempo and Timing of Rhythm Pattern First, a target music program is selected from the disc 1 and reproduced, and the beginning portion of the music is heard for several seconds to several ten seconds.
At this time, according to the rhythm of the music, the rhythm input pad 41
Tap to input the rhythm to the rhythm input means 22. FIG. 3 is this explanatory view. The uppermost stage is the rhythm of the music, and the lower stage is the rhythm (beat) input from the rhythm input pad 41. The rhythm pattern output timing calculation / control means 21 receiving the output of the rhythm input means 22 stores the rhythm input timing as the reproduction address of the CD based on the reproduction address information from the system controller 10. A-TIME: a0, a1, a2, ... Of FIG. 3 is the address information of the rhythm input. At this time, the music start timing A0 of the music is stored at the same time.

There are two possible methods for detecting the music start timing A0. One is a method of automatically detecting by detecting the audio output level of the reproduced music. Figure 3
The lowest stage (silence detection) shows this automatic detection method. The second is a manual input method in which the user inputs the timing using the rhythm input pad 41. In the latter case, the first input from the rhythm input pad 41 is treated as A0, and the second and subsequent inputs are treated as rhythm inputs a0 to ak.

As shown in FIG. 4, the rhythm pattern output timing calculation / control means 21 controls the rhythm inputs a0 to ak.
The average time interval (time difference) ΔP is calculated from each time interval ΔP0, ΔP1 ... This ΔP is the tempo (interval value) when the rhythm pattern is generated, and is stored. The arithmetic expression of this ΔP is as follows.

[0017]

[Equation 1]

The calculation / control means 21 further calculates the address information A-TIME: as on the CD at the beginning of the rhythm, as shown in FIG. As is selected in consideration of the detection delay of A0, the closest value preceding the timing of A0 is selected. The as calculated and selected as described above is the reference timing when the rhythm pattern is generated, and is stored. The arithmetic expression of this as is as follows. Note that fix [] in this arithmetic expression represents integerization.

[0019]

[Equation 2]

(2) Setting of Rhythm Pattern Repeat Number The repeat number setting means 23 sets the number of times N the rhythm pattern is generated. Specifically, while looking at the display of the countdown display 43 of the operation unit 40, the desired numerical value N is input by the (+,-) operable countdown number set key 42. This numerical value N is not always necessary,
It is stored in the storage means 24 and is used when a rhythm pattern is generated. When the rhythm pattern is generated, the countdown display 43 displays the remaining number of rhythm patterns generated after that time.

(3) Calculation of Rhythm Pattern Generation Timing Rhythm pattern output timing calculation / control means 21
Based on the set three types of parameters ΔP, as, N,
Address information A-TIME: as-N + 1, as-N + on the CD corresponding to the timing of actually generating a rhythm
2, as-N + 3 ... is calculated. FIG. 5 is an explanatory diagram of this.

(4) Generation of Rhythm Pattern First, the beginning of music of the disc 1 is searched. As shown in FIG. 5, the search target address given from the arithmetic / control means 21 to the system controller 10 is set in a direction that temporally precedes the first rhythm generation timing as-N + 1. After searching the target address, the normal speed reproduction operation is started. At this time, it is preferable that the audio output from the disc 1 be in the mute state.

The arithmetic / control means 21 monitors the reproduction address from the system controller 10, and as-N + 1.
Then, the rhythm pattern generating means 25 is instructed to generate a rhythm pattern. After that, similarly, as-N +
A rhythm is generated at the timing of each reproduction address of 2, as-N + 3, ..., As. When the rhythm pattern generating means 25 has a sound source of a musical instrument, the rhythm can be generated by the musical instrument sound. At this time, the calculation / control means 21
Instructs the display device 26 to blink the rhythm display device 44 in accordance with the rhythm generated sound, or display the remaining number of rhythm patterns on the countdown number display device 43.

The mute of the audio output is released at the first timing of the index "01" of the reproduction address information or when the time information "zero" of the same program as this is detected. The method for canceling the audio mute is the same as the normal method for searching for the beginning of the music and starting the reproduction operation.

(5) Fine adjustment of rhythm pattern If the rhythm signal input to the rhythm input means 22 is unstable, the timing of rhythm pattern generation may deviate from the actual reproduced sound. The timing amount fine adjustment means 28 is used for fine adjustment of the timing deviation. That is, (4)
The rhythm pattern is generated and the beginning of the music is reproduced, and the timing shift amount fine adjustment key 48 shifts the rhythm sound generation timing forward or backward.
At this time, the rhythm pattern output timing calculation / control means 21 corrects the value of as based on a command from the timing shift amount fine adjustment means 28, and further, as-N + 1, ..., a.
Correct the value of s-1.

After the above correction, the corrected as-N +
Based on 1, ..., As-1, as, the rhythm pattern generating operation of (4) is performed. If the rhythm sound generated through such correction is desirable, the input confirmation key 47 is pressed. The same correction can be made for the tempo. When such correction is unnecessary, the input confirmation key 47 may be pressed when the rhythm pattern of (4) is generated.

(6) Parameter storage When the input confirmation key 47 is pressed during generation of the rhythm pattern in (4) or during fine adjustment of the rhythm pattern in (5), the rhythm pattern output timing calculation / control means 21 causes the parameters as, ΔP, N together with disc and program (song) identification information from the system controller 10,
It is stored in the storage means 24. When the rhythm sound is generated again after the music is changed or the disc is exchanged, the disc and program information are sent to the storage means 24 to read the parameters as, ΔP, N, and the rhythm pattern output timing calculation / control means 21. Is as-N + 1, ..., as-
After calculating 1, the rhythm pattern is generated by the rhythm pattern generating operation of (4).

The storage means 24 is not only configured as an independent memory, but is a UTOC (User Table of Contents) if it is a recordable disk medium such as MD.
Can be used as the storage means 24, and the parameters as, ΔP, N can be recorded therein corresponding to the track numbers (songs). In this case, it is efficient because neither the disc identification information is stored nor the disc identification information is processed.

In the above description, the CD player is taken as an example, but the form of the reproducing apparatus and the type of recording medium are not limited to this. That is, if the recorded music information is managed on the recording medium by an address having sufficient resolution as a rhythm pattern generation timing, another disk medium such as MD or a tape medium such as DAT or DCC. But good. Further, in the configuration of FIG. 2, the rhythm sounding body 45 and the various indicators 43, 44, and 46 are arranged on the operation section 40 side, but they may be arranged on the player main body 30 side. Further, the operation unit 40
If a normal remote controller can be used as, and the system controller 10 of the player main body 30 can include all the functions of the rhythm pattern generation circuit 20, a dedicated operation unit is not required and the operation can be performed at low cost.

[0030]

As described above, according to the present invention,
When playing a song recorded on a disk or tape-shaped recording medium, it had the function of generating a rhythm pattern synchronized with the performance speed of the song at the start of the song, for an arbitrary period of time, including before the start. A recording medium reproducing device can be provided.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing an example of the external appearance of the device of the present invention.

FIG. 3 is an explanatory diagram of an operation at the time of rhythm input of the present invention.

FIG. 4 is an operation explanatory diagram when a rhythm pattern is calculated according to the present invention.

FIG. 5 is an operation explanatory diagram when a rhythm pattern of the present invention is generated.

[Explanation of symbols]

1 ... Disk (recording medium), 2 ... Spindle motor, 3
... optical head, 4 ... thread feed motor, 5 ... high frequency amplifier, 6 ... servo signal processing section, 7 ... digital signal processing section, 8 ... digital filter, 9 ... D / A converter, 1
0 ... System controller, 20 ... Rhythm pattern generation circuit, 21 ... Rhythm pattern output timing calculation / control means, 22 ... Rhythm input means, 23 ... Repeat number setting means, 24 ... Storage means, 25 ... Rhythm pattern generation means,
26 ... Display device, 27 ... Parameter confirmation means, 28 ... Timing shift amount fine adjustment means, 30 ... C player body, 40 ... Operation part, 41 ... Rhythm input pad, 42 ... Countdown number set key, 43 ... Countdown number display Instrument, 44 ... Rhythm indicator, 45 ... Rhythm sounder, 46
... Timing shift amount indicator, 47 ... Input confirmation key, 4
8 ... Timing shift amount fine adjustment key.

Claims (2)

[Claims] 1. Playback means for playing back music recorded on a disk or tape-shaped recording medium, and rhythm pattern setting means for storing the tempo and timing of the music in the music as parameters for each music. Rhythm pattern generating means for generating an acoustic rhythm pattern based on the parameters, repetition number setting means for setting the number of times the rhythm pattern is generated, when selecting a piece of music from the recording medium and reproducing it by the reproducing means, Before the music start of the selected music, control means configured to add the rhythm pattern for the number of times of occurrence so as to be continuous in synchronization with the music start is recorded. Media playback device. 2. A reproducing means for reproducing a music piece recorded on a disk- or tape-shaped recording medium, and a rhythm input means for externally inputting the rhythm timing of the music piece being reproduced by the reproducing means. Tempo detecting means for detecting the tempo from the timing of the rhythm, parameter storage means for storing the tempo and timing as parameters for each song, means for detecting the song start timing of the song being reproduced, and the parameter Rhythm pattern generating means for generating an acoustic rhythm pattern based on the above, repeat number setting means for setting the number of times the rhythm pattern is generated, and when selecting music from the recording medium and reproducing by the reproducing means, the selection is made. From the time position before the start of the song that is the number of times the rhythm pattern has occurred With operating the reproducing means, prior to the song start of the selected song, so as to be continuous synchronized to musical composition Start, the number of occurrences adding the rhythm pattern,
A recording medium reproducing apparatus comprising: a control unit that operates the rhythm pattern generating unit so as to stop the rhythm pattern or lower the volume at the time when the music starts or in the vicinity thereof.