JPS62283397A - Music reproducer with rhythm recognizing function - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention is a music playback device (karaoke equipment, radio and cassette players, etc.).

<Prior Art> Conventionally, music playback devices have been diversified and have many additional functions. In particular, in recent years, karaoke machines that sing with the accompaniment of performances on tapes, discs, etc. have become popular.

<Problems to be solved by the invention> These devices have come to have multiple functions such as automatic scoring and key shift functions, but they still do not have a function to notify the tempo of a song, making it difficult to sing songs that are difficult to follow the rhythm of. It has been considered difficult.

The present invention has been made in view of the above circumstances, and its purpose is to provide a music reproducing device that can notify the tempo of the song being played.

Means for Solving the Problems> A music playback device with a rhythm recognition function according to the present invention includes a rhythm recognition means for recognizing the rhythm of music of a reproduced sound source, and a tempo of the rhythm recognized by the rhythm recognition means. It is characterized by comprising a display means.

For Kusaku Recognizes and displays the rhythm of the music being played.

<Example> Hereinafter, an example of the present invention will be described based on the attached drawings.

The music playback device with rhythm recognition function shown in FIG. 1 is a music playback device (for example, a so-called boom box or karaoke device).
A rhythm recognition function has been added to the system to notify the tempo of the song being played.

In this device, a microphone input section 1 (a section for manually inputting singing voices, etc.) and a sound source reproduction section 2 are sections for reproducing performances from a tape deck, a disc player, etc., and both 1.
The signal from 2 passes through an amplifier 3 and is output from a speaker 4. The above parts are the same as conventional karaoke machines.

On the other hand, the rhythm recognition section 5 is a section that extracts rhythm components from the signal input from the sound source reproduction section 2 and recognizes the tempo.The recognized tempo is displayed on the display section 6, for example, by flashing a lamp or by Indicated by a change in pattern.

Therefore, when singing with the reproduced music as accompaniment as a karaoke device, it is easy to sing because the tempo is displayed.

The rhythm recognition section 5 is configured as shown in FIG. In the human signal processing unit B, the reproduced signal A from the sound source reproduction unit 2 is amplified by the amplifier Bl, the low frequency signal is extracted by the low pass filter B2 in order to emphasize the rhythm signal, and the waveform shaping unit B3
It is converted into a digital signal that can be processed by the rhythm recognition processing section C in the subsequent stage, and sent to the rhythm recognition processing section C. In the rhythm recognition processing section C, the input interval measurement timer C1 measures the time interval between the low-pitched "Dou" notal signal and the immediately preceding manual pulse.This time interval is stored in the pulse interval storage area C2.
is stored in When the number of pulse interval data required for recognition is stored in the pulse interval storage area C2, the rhythm calculation processing section C3 calculates the rhythm time based on the data in the memory C2.

The rhythm calculation processing unit C3 determines the rhythm time interval based on the data in the memory C2 and the plurality of rhythm patterns stored in RO>i! 1] Find the relationships sequentially,
The rhythm time interval (tempo) is determined using the rhythm pattern with the highest correlation.

The output processing section initializes the rhythm time interval timer D1 using the software of the microcomputer according to the rhythm time interval determined by the rhythm recognition processing section C (2. The rhythm signal processing section D2 initializes the rhythm time interval timer D1 using the rhythm time interval determined by the rhythm recognition processing section C (2).
The output signal E is generated every time.

This output signal is sent to an external device such as the display section 6.

Through the above processing, it is possible to obtain a rhythm output display according to the input music signal.

In this embodiment, two types of timers are provided: a human power interval measurement timer CI for input processing and a rhythm time interval timer D1 for output processing, so that manual processing and output processing can be performed in parallel. This makes it possible to quickly respond to rhythm changes and recognize rhythms.

In the present invention, the rhythm component is recognized and output from the music signal of the sound source, but in order to further simplify the recognition section and improve the accuracy of tempo output, for example, a rhythm component that corresponds to the tempo is included in the sound source signal. It is also possible to use a configuration in which a signal that allows the output pattern to be output is inputted in advance and a similar effect is obtained by reproducing the signal. <Effects of the Invention> In the present invention, it is possible to notify the rhythm of the music being played. This makes it easier for the singer and listener to understand the tempo of the song.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the invention. FIG. 2 is a block diagram of the rhythm recognition section. 1 to 4...Music playback device, 5...Rhythm recognition section, 6.Display section.

Claims (1)

[Claims] (1) A music playback device with a rhythm recognition function, comprising: a rhythm recognition means for recognizing the rhythm of music of a reproduced sound source; and a display means for displaying the tempo of the rhythm recognized by the rhythm recognition means.