JPH0619488A - Orchestral accompaniment device - Google Patents

Abstract

PURPOSE:To improve production effect by automatically varying lighting according to the atmosphere of music. CONSTITUTION:This orchestral accompaniment device is equipped with a low- pass filter 8 which is provided at an input part 7 for a musical sound, a peak component detection part 1 which is provided behind this low-pass filter 8 and detects the peak component of the musical sound, a level varying component detection part 2 which is provided behind the low-pass filter 8 and detects the level varying component of the musical sound, an A/D converter 3 which converts those data into digital data, a central arithmetic part 4 which inputs the output of this A/D converter 3 and compares the peak component with the level varying component to classify the kind of the music, and a control part 6 which controls a lighting device 5 according to the classification signal outputted from the central arithmetic part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke device, and more particularly to a device for automatically changing a lighting device according to a song.

[0002]

2. Description of the Related Art In recent years, along with the popularization of karaoke, karaoke devices have been improved in music selection function and video function. Has been devised such as adding a lighting function.

In such a case, it is necessary to set the lighting according to the genre of the music selected by the customer. For example, for disco songs, it is desirable to use flashy lighting that changes greatly, and for enka, it is desirable to use quiet lighting that changes slowly.

[0004]

However, since the conventional lighting device has to be manually operated, it is not possible to use it for home use, and even in the work of playing karaoke, it is not possible to play a song. There is a problem that a dedicated operator who listens and performs proper lighting is required.

The present invention has been made in view of the above matters, and provides a karaoke apparatus which does not require a dedicated operator and can automatically control lighting according to a song to enhance the effect of production. To do this is a technical issue.

[0006]

In order to solve the above technical problems, the present invention has the following constitution. That is, a low-pass filter 8 provided in the tone input section 7, a peak component detection section 1 provided after the low-pass filter 8 for detecting a peak component of the tone, and a low-pass filter 8 provided after the low-pass filter 8, A level fluctuation detecting unit 2 for detecting the level fluctuation of a musical sound, an A / D converter 3 for converting these data into digital data, and this A / D converter 3
A central operation unit 4 that classifies the type of music by comparing the peak component and the level variation with the output from
The control unit 6 controls the lighting device 5 based on the classification signal output from the central processing unit 4.

When a song is selected, the lighting device 5 can be automatically rendered in accordance with the song. Therefore, there is no difference in operation from a normal karaoke device, and it can be widely used not only for home use but also for business use.

[0008]

Function: The sound from the CD or the laser disk player is input to the input section 7. The musical sound input from the input unit 7 passes through the low-pass filter 8 so that only low-frequency components pass through.

When this low-frequency component is input to the peak component detecting section 1, only components above a predetermined value (threshold level) are detected. Further, when the sound of the low frequency component is input to the level fluctuation amount detecting unit 2, the level at time t and the level at time t1 are compared. If the difference is large, it means that the song has a lot of level fluctuations. When is small, it is determined that the song has little level fluctuation.

These data are converted from analog to digital by the A / D converter 3 and then input to the central processing unit 4. The central processing unit 4 classifies music types based on the ratio of the peak component and the level variation. This classification method is performed as follows.

That is, as a result of experiments conducted by the applicant, a large number of songs have a large ratio of the peak component to the level fluctuation, that is, (fluctuation / peak component), and this value is large. I could see many small songs in the Enka style. And it became clear that rock tone, pop tone, etc. were located between these.

Therefore, by dividing the range of the numerical value of (variation / peak component) into, for example, four stages, and determining which of the four stages the measured value corresponds to and outputting the result.
In order from the largest value of (Variation / Peak component),
It can be classified into disco style, rock style, pop style, and enka style.

Then, the classification signal output from the central processing unit 4 is input to the control unit 6, and switching and power control of the lighting device 5 connected thereto is performed. Then, according to a pattern set in advance in the central processing unit 4, it is possible to control the blinking of the lighting device 5, the amount of light, the direction change, etc. to produce an effect.

[0014]

[Embodiment 1] An embodiment of the present invention will be described with reference to FIGS. The input section 7 is connected to a sound output terminal of a CD player or a laser disc player, and a musical sound is inputted from here. A low pass filter 8 is connected to the input unit 7, and the high frequency component of the input low frequency signal is attenuated and only the low frequency component is output.

A peak component detecting section 1 for detecting a peak component of a musical tone is connected to the subsequent stage of the low pass filter 8. The peak component detector 1 outputs a signal only when an input of a threshold level (for example, 0.5 V) or more set in advance is input, and does not output a signal when the input is less than that. ing.

Further, in the subsequent stage of the low-pass filter 8, a level fluctuation amount detecting section 2 for detecting the level fluctuation amount of the musical sound.
Are connected. In the level fluctuation amount detecting unit 2, the level at time t and the level at time t1 are compared, and when the difference between the two is small, the level fluctuation is small,
When the difference between the two is large, the song has a large level fluctuation.

The signals from the peak component detecting section 1 and the level fluctuation detecting section 2 are multiplexed by an analog multiplexer P, and subsequently these data are digitally converted A.
It is input to the / D converter 3. The digital output from the A / D converter 3 is input to the central processing unit 4. The central processing unit 4 is composed of a microcomputer and a memory.

The central processing unit 4 classifies the types of music by comparing the peak component with the level fluctuation amount, and internally calculates (fluctuation amount / peak component),
Then, the range of the numerical value of (variation / peak component) is divided into four stages, and which of the four stages the measured value corresponds to is output.

The output of the central processing unit 4 is input to the analog multiplexer P and the control unit 6. The analog multiplexer P is controlled because the signals from the peak component detecting section 1 and the level fluctuation detecting section 2 are divided and taken in time series (TDM). This is to synchronize those frames.

The control unit 6 is configured such that the power source 9 is individually connected to the illuminating devices 5 arranged in large numbers, and the illuminance thereof is controlled, and the angle and the rotation speed of the rotating light can be controlled. . A thyristor chopper is used for illuminance control.

The operation of the above configuration will be described. The musical sound input from the input unit 7 passes through the low-pass filter 8 so that only low-frequency components pass through.

When this low frequency component is input to the peak component detecting section 1, only components having a predetermined value (threshold level) or higher are detected. Further, when the sound of the low-frequency component is input to the level fluctuation amount detecting unit 2, it is determined that the music has a large level fluctuation when the difference is large, and the music having a small level fluctuation when the difference is small. It

These data are converted from analog to digital by the A / D converter 3 and then input to the central processing unit 4. The central processing unit 4 classifies music types based on the ratio of the peak component and the level variation. This classification has four levels, and in descending order of numerical value, it is classified into disco style, rock style, pop style, and enka style.

Here, for example, if the inputted musical tones are classified as disco tones, a flashy effect prestored in the central processing unit 4 will be produced. Specifically, the switch timing of the lighting device 5 is fast, the color tone changes rapidly, and at the same time, the rotating light rotates at the maximum speed and the strobe etc. also emit light.

On the other hand, if the inputted musical tone is classified as an ensemble tone, a calm effect prestored in the central processing unit 4 will be provided. Specifically, the switch timing of the lighting device 5 is late, the color tone changes slowly, and the rotating light slowly rotates or stops, and the strobe etc. also stop.

As described above, the effect can be produced by controlling the blinking of the illuminating device 5, the amount of light, the direction change, etc. by the pattern preset in the central processing unit 4. The above operation will be described with reference to the flowchart shown in FIG.

First, in step 100, 1 is substituted for n as a counter in step 101. Then, after waiting for 1 second in step 102, the peak and change amount of the input signal are input to the central processing unit 4 in step 103. Then, in step 104, the variation / peak component is calculated and this numerical value is substituted for k. Then, in step 105, the average value of the numerical value k for each loop is calculated, and in step 106, it is substituted into D. Then, counter step 107
Move to.

In steps 108, 109 and 111, the value D is the preset production pattern X1, X2, X3.
It is determined which of the set values corresponds to. That is, if D> X1 in step 108, then step 1
10, and similarly, the positive branch Y in step 109
Moves to step 112, and the positive branch Y of step 111 moves to step 113.

In this way, the patterns P1, P2, E
After being classified into four types of 1 and E2, the above step 102
By forming a loop back to, it is possible to respond to changes in the song.

As described above, the illumination according to the content of the music selection is automatically performed, and the effect of production can be enhanced.

[0031]

According to the present invention, the lighting can be automatically changed according to the atmosphere of the music, and the effect of production can be greatly improved. Moreover, since the change of the illumination is automatically performed, a dedicated operator is not required, and the labor can be saved.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a claim according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an embodiment of the present invention.

[Explanation of Codes] 1 ... Peak component detecting unit, 2 ... Level fluctuation detecting unit, 3 ... A / D converter, 4 ... Central arithmetic unit, 5 ... Lighting device, 6 ... Control unit, 7 ..Input section, 8 ... Low-pass filter

Claims (1)

[Claims] 1. A low-pass filter provided in a tone input section, a peak component detection section provided after the low-pass filter for detecting a peak component of the tone, and a low-pass filter provided in the latter stage of the low-pass filter. A level fluctuation detecting section for detecting a level fluctuation, an A / D converter for converting these data into digital data, and an output from the A / D converter as an input, A central processing unit that classifies the types of the above, and a control unit that controls the lighting device based on the classification signal output from the central processing unit, so that the lighting device can be automatically rendered according to the song. A karaoke device characterized by being configured.