JPH0158570B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an accompaniment music reproducing device, and particularly to a high frequency removal means, a phase comparison means for comparing the phases of left and right channel signals, and a value for determining the phase difference between the left and right channel signals. phase difference level detecting means that generates an output when the phase difference level exceeds 1, and singing start time display means that displays the singing start time to the singer. and when the phase comparison output exceeds a predetermined value, the phase difference level detection means generates an output voltage, and the generated voltage activates and lights up the singing start time display means. The present invention relates to an accompaniment music playback device that displays a singing start time to a singer.

So-called karaoke has now become a product category, but when amateurs actually sing, it is difficult to judge when to start singing, so they sometimes start singing in the introduction before the singing section, or they start singing after the introduction before the singing section. I often make mistakes, such as having to hurry up and sing along to the accompaniment.

Normally, when a band or accompanist is present, it is possible to signal the singer when to start singing, but similarly, in karaoke, it is extremely necessary for amateurs to signal when to start singing. As a method of signaling when to start singing at karaoke, a singing accompaniment music tape is provided with a monaural recording part in which the same sound is recorded on multiple tracks and a stereo recording part in which multiple sounds are recorded in the plurality of tracks, and the sound image of both recording parts is created. There is a technology that lets you know when to start singing based on changes in the localization of the accompaniment music, that is, differences in the spread of the accompaniment music. In other words, the introductory part before the singing section is composed of a monaural recording section alone, or a monaural recording section and a stereo recording section are provided alternately, and the accompaniment section after the singing section is composed of a stereo recording section alone. be.

When such a singing accompaniment music tape is played back in stereo, the accompaniment music will be heard from the center of the left and right speakers in the monaural recording section, but the accompaniment music will be heard from the center of the left and right speakers in the stereo recording section, spreading out as a three-dimensional sound field from the left and right speakers. I can hear it.

This difference in the spread of the accompaniment music allows the singer to know when to start singing. In this technology, the time to start singing is notified by hearing, but since there is an accompanist, in order to start singing in response to a signal from the accompanist, it is necessary not only to hear but also visually. It is necessary to know when singing starts.

The present invention was made in view of this need, and includes a high frequency removal means, a phase comparison means, a phase difference level detection means, a singing start time display means, and a singing start time display means in the stereo recording section. It is an object of the present invention to solve the above-mentioned need by activating and lighting the means to inform the singer of the time to start singing.

The present invention will be explained below based on the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a circuit diagram showing one embodiment.

Reference numeral 1 denotes a high frequency removing means for removing out-of-phase signals of high frequency signals due to tape running, head azimuth deviation, etc. The high frequency removal means 1 includes a monaural recording section M in which the same sound is recorded on multiple tracks CH ₁ and CH ₂ , and a monaural recording section M that records the same sound on multiple tracks CH ₁ and CH ₂ .
A stereo recording section S that records a plurality of sounds is connected to the L and R channels, into which the left and right channel signals of the singing accompaniment music tape (see Figure 3) arranged in series are input.
It is connected to both channel signal paths and uses a low pass filter.

Reference numeral 2 denotes a phase comparison means which inputs both output signals of the high frequency removal means 1 and compares the phases of both output signals. A comparator is used as the phase comparison means 2. In the monaural recording section M, the L and R channel signals have the same magnitude and the same phase, so the output of the phase comparison means 2 is zero, but in the stereo recording section S, reflected sounds etc. are always present in the L and R channel signals. Since there is a phase difference, an output is generated in the phase comparison means 2. Reference numeral 3 denotes a phase difference level detection means which receives the output signal of the phase comparison means 2 and generates an output voltage in the stereo recording section S. The phase difference level detection means 3 is composed of a full-wave rectifier circuit and a comparator.

Reference numeral 4 denotes a singing start time display means which inputs the output signal of the phase difference level detection means 3 and displays the singing start time to the singer. A light emitting diode or the like is used as the singing start time display means 4, and the singing start time is displayed by lighting the light emitting diode or the like.

Unlike what is shown in FIG.
In this case, the singing start time display means 4 does not light up, but in the accompaniment part B, the singing start time display means 4 lights up to display the singing start time to the singer.

As shown in Fig. 3, when the introductory part I is composed of a stereo recording section S and a monaural recording section M,
The third lighting of the singing start time display means 4 indicates the singing start time.

When a plurality of stereo recording sections S and monaural recording sections M are provided alternately in the introduction part I, the lighting of the singing start time display means 4 is intermittently lit, but at what number of lights should the singing start? If the singer is made aware of this in advance by displaying this on the tape wrapping paper or the like, the lighting of the singing start time display means 4 at the designated number will indicate the singing start time.

As described above, the present invention includes a high frequency removal means, a phase comparison means, a phase difference level detection means, and a singing start time display means, and in a stereo recording section, the singing start time display means is activated. By informing the singer of the time to start singing, it is possible to more accurately visually judge the time to start singing based on the difference in spread of accompaniment music between the monaural recording part and the stereo recording part. The effect is that the singer can be given a sense of security as if he were to start singing in response to a signal from the accompanist.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of this invention, FIG. 2 is a circuit diagram showing an embodiment of this invention,
FIG. 3 is a diagram showing the structure of a singing accompaniment music tape used in the present invention. DESCRIPTION OF SYMBOLS 1...High frequency removal means, 2...Phase comparison means, 3...Phase difference level detection means, 4...Singing start time display means, _CH1 , _CH2 ...Track, L,
R...Channel, M...Monaural recording section, S...
...Stereo recording section, I...Introduction section, B...Accompaniment section.

Claims (1)

[Claims] 1. A monaural recording section in which the same sound is recorded on multiple tracks and a stereo recording section in which multiple sounds are recorded on the plurality of tracks are arranged in series. a removal means, a phase comparison means for comparing the phases of the left and right channel signals, a phase difference level detection means for generating an output when the phase difference between the left and right channel signals exceeds a predetermined value, and a means for informing a singer of when to start singing. A singing start time display means is provided, and the phase comparison means compares the phases of the left and right channel signals from which high frequency components have been removed by the high frequency removal means, and the phase comparison output exceeds a predetermined value. The phase difference level detection means generates an output voltage when
The accompaniment music reproducing device uses the generated voltage to operate and light up the singing start time display means to display the singing start time to the singer.