JP3693126B2 - A device that generates praise for singing karaoke - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus for generating praise for a karaoke singing voice emitted by a user and added to a music signal for reproduction or recording.
[0002]
[Prior art]
When using karaoke, a user sings using a microphone in accordance with music obtained from a recording device or other sound source. The singing voice and the music signal are combined for playback or recording through a speaker. A praise signal obtained from a speech synthesizer with pre-recorded praise such as applause, “encore”, etc. may be added when the music and the user's singing voice are finished. In general, the user needs to manually start praise after the music and singing voices are reproduced. Conventional methods are implemented with expensive integrated circuits having detector outputs that depend on the amplitude of the singing voice. In conventional devices, praise is initiated manually or fixedly.
[0003]
[Problems to be solved by the invention]
The object of the present invention is to facilitate the automatic operation of a speech synthesizer in which applause, praise such as "bravo", "encore", etc. are pre-recorded based on a simple singing voice evaluation device. It is.
[0004]
[Means for Solving the Problems]
According to the present invention, the evaluation means is provided to measure parameters such as the volume, pitch and duration of the user's singing voice and to start praise that automatically depends on the measurement results of the evaluation.
In the device of the present invention, the praise issued has a strength, a length, and a type derived from the measurement result of the evaluation. The praise is preferably automatically started at the end of the user's song. A music detection circuit is provided that provides an output voltage having a threshold and indicating the start and end of music, and the output voltage is used to start the praise. The circuit preferably has a small time constant of about 15 milliseconds for detecting the start of music and a large time constant of about 5 seconds for detecting the end of music. The music detection circuit may include a Darlington circuit at the output that provides a rapid change in output from one state to another. An evaluation circuit is provided having a first input proportional to the magnitude of the singing voice signal and a second input proportional to the frequency.
[0005]
【Example】
For better understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, two microphones that capture the user's singing voice are connected to a karaoke apparatus 3 whose output is connected to the addition stage 4. The music signal from the recording device or other sound source is supplied to the input of the addition stage 4 and the music detection circuit 5. The output f of the circuit 5 is connected to the input of the microprocessor 6. The two outputs a and b of the karaoke device 3 are connected to two inputs of an evaluation detector 7 whose output is connected to another input of the microprocessor 6. At the outputs a and b, the karaoke apparatus 3 supplies a first signal proportional to the volume of the singing voice signal and a second signal proportional to the frequency of the singing voice signal . Output c of microprocessor 6 Ru is connected to the input of the speech synthesizer 8. The synthesizer 8 generates a praise signal that is fed to another input of the summing stage 4. A music signal appears together with the singing voice from the device 3 at the output e of the adding stage 4, and a praise signal appears from the synthesizing device 8 after the music and the singing voice are finished.
[0006]
The music detector 5 is realized by transistors TU116, TU117 and TU118. The TU 116 functions to amplify the music audio signal by 6 dB. The output is rectified by diode DU001. When the direct current exceeds the threshold of the Darlington type comparator constituted by the transistors TU117 and TU118, the output decreases. The Darlington ensures that one state is transferred to another state with a small base current. A change from high to low in the output f represents the start of music and a change from low to high represents the end of music. The shorter time constant is only about 15 milliseconds so that the start of music can be detected quickly, while the longer acquisition time is about 5 seconds to avoid misidentifying intermittent gradual weakening of music. is there.
[0007]
The evaluation detection circuit includes transistors TU108, TU110, and TU111, and is similar to the music detection circuit 5.
[0008]
FIG. 3 shows the duration of the operating state depending on the amplitude of the singing voice represented by the voltage Vin. Since the acquisition time is reduced to about 200 milliseconds, the evaluation detector can respond more quickly to singing voice changes.
4 and 5 are flowcharts illustrating the operation of the device and an exemplary automatic praise algorithm.
[0009]
The flow of the algorithm for the auto-praise aspect is shown by a flow chart and does not require further explanation, but the meaning of the marking and storage will be briefly explained below.
"Interrupts" are based on conventional 1 millisecond interrupts, and the auto-praise routine is processed every second, thereby minimizing software load and scoring counter overflow. This is done by the first counter A. The indication of music status is active low. The end of the song is detected by changing from low to high. However, the score count can be activated when the music state is active low. This makes it easy to start scoring at any part of the song, which is convenient when fast-forwarding or rewinding the tape to the beginning of the song rather than to the beginning of the song.
[0010]
In addition, the music count minimizes false triggers etc. caused by the music status detector due to low music weakness. The score count is incremented each time the evaluation detector scans and detects that it is active low. A praise flag is set when the score count exceeds a predetermined threshold. Each time the score count increases by 10, the praise count increases. Thus, the praise count can be used to extend the duration of praise or to operate another section of the “higher praise” speech synthesizer.
[0011]
【The invention's effect】
According to the present invention, the singing voice detector is implemented using a low cost transistor detector having a variable duty cycle proportional to the singing voice amplitude, pitch and duration. Depending on the evaluation of the singing voice at the end of the song, automatic praise with various strengths, lengths and types can be realized. The new concept is to realize new attractive features of karaoke applications in an excellent cost-effective manner. The present invention provides new features that are not yet available in the market but are expected to gain popularity as karaoke applications.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a device according to the invention in part in the form of a block and in other parts in detail.
FIG. 2 is a graph showing time dependence of an operating state with respect to the frequency of singing voices.
FIG. 3 is a graph showing the dependence of the operating state on the singing voice amplitude.
FIG. 4 is a flowchart showing the operation of the apparatus according to the present invention.
FIG. 5 is a flowchart subsequent to FIG. 4 illustrating the operation of the apparatus according to the present invention.
[Explanation of symbols]
1, 2 Microphone 3 Karaoke device 4 Addition stage 5 Music detection circuit 6 Microprocessor 7 Evaluation detector 8 Speech synthesizer

Claims (3)

A device for generating a praise signal for a karaoke singing voice, comprising a karaoke device, an evaluation detection circuit, a music detection circuit, a microprocessor, and a speech synthesizer,
The karaoke device detects a volume and a frequency from a user's singing voice input from a microphone,
The evaluation detection circuit generates a first signal proportional to the volume detected by the karaoke device and a second signal proportional to the frequency detected by the karaoke device, and the first signal or the When the second signal is equal to or greater than a predetermined value, an evaluation signal is output,
The music detection circuit determines whether or not input music is being output based on a threshold,
The microprocessor counts a score while the evaluation detection circuit outputs the evaluation signal during a period when the music detection circuit determines that the music is being output, and the music detection circuit ends the music. when determining, the praise signal corresponding to the score obtained by the counting Ru is generated in the speech synthesizer, generates praise signals for karaoke singing voice device. The praise signal generated by the speech synthesizer, and strength corresponding to the score obtained by said count, and length, and a type, a device for generating praise signals for karaoke singing of claim 1. 2. The karaoke of claim 1, wherein the music detection circuit has a small time constant of about 15 milliseconds for detecting the start of music and a large time constant of about 5 seconds for detecting the end of music. A device that generates praise signals for audio.

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