JPH05232861A - Orchestral accompaniment system - Google Patents

Abstract

PURPOSE:To provide the orchestral accompaniment system which can be enjoyed as a playing method over a wide range by reflecting the motion and speech of a singer in real time on previously generated orchestral accompaniment video information and speech information. CONSTITUTION:The orchestral accompaniment system uses a chromakey as a composing means for the orchestral accompaniment video information and singer video information, and a video camera 7 which detects a singer 5 and the background 6 and a detection and composition device 8 which reflects the singer video information and background video information obtained by the video camera 7, and singing voice on the orchestral accompaniment device 4 are added to the system constitution of a display 1 which displays the orchestral accompaniment information, a microphone 2 through which a singer inputs a singing voice to the accompaniment of a text on the display 1, a speaker 3 which outputs the singing voice from the microphone 2 while making it correspond to orchestral accompaniment music corresponding to the orchestral accompaniment video information, and an orchestral accompaniment device 4 which controls the display 1, microphone 2, and speaker 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke system, and in particular, a karaoke system capable of outputting karaoke video information and voice information created in advance in real time to reflect the motion and singing voice of a singer. Related to effective technology.

[0002]

2. Description of the Related Art For example, in a conventional karaoke system, a display for displaying a karaoke image in which lyrics are combined, a microphone for a singer to input a singing voice, and a singing voice by the microphone are made to correspond to karaoke music corresponding to the karaoke image. Which is composed of a speaker that outputs the sound, a karaoke device that controls the display, a microphone and the speaker, and the like, so that the singer can sing along with the karaoke music that flows from the speaker while watching the lyrics displayed on the display. Is.

In this case, the karaoke image and the karaoke music are previously recorded as image information and audio information on a laser disc or the like, and the laser disc is reproduced through the karaoke device to display the karaoke image on the display. Moreover, karaoke music corresponding to this karaoke image is played from the speaker.

[0004]

However, in the prior art as described above, the singer can only sing along with the music from the speaker while watching the lyrics on the display, and sings for this purpose. You can only enjoy it simply.

Therefore, the present inventor focused on a video camera capable of photographing a subject, and combined the function of recording / reproducing the image of the subject of this video camera in real time, whereby the operation and voice of the singer were added to the conventional karaoke system. It has been found that can be reflected.

That is, an object of the present invention is to provide a karaoke system in which a video and audio corresponding to a singer's action are reflected in real time on the karaoke video information and audio information created in advance so that the karaoke system can be widely enjoyed as a play method. To do.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0008]

Among the inventions disclosed in the present application, a brief description will be given to the outline of typical ones.
It is as follows.

That is, the karaoke system of the present invention is
A display that displays karaoke video information that combines lyrics, a microphone that the singer inputs singer voice information according to the lyrics of this display, and a singer voice information from this microphone that corresponds to the karaoke voice information that corresponds to the karaoke video information. A karaoke system comprising: a speaker for outputting the singing and a karaoke device for controlling the display, the microphone, and the speaker, and video detection means for detecting the singer and the background of the singer, and singer video information by the video detection means. Detection and synthesis that detects a singer's motion based on the result of comparison with background video information and synthesizes at least graphic video information with karaoke video information and karaoke voice information from the graphic video information and audio information generated corresponding to the singer's motion And means.

In this case, the detecting / synthesizing means stores the singer image information by the image detecting means, the background storing means for storing the background image information by the image detecting means, and the singer image information of the image storing means. And the background image information in the background storage unit, the control unit controlling the control unit according to the comparison result, the graphic storage unit storing the graphic image information generated by the control unit, and the singer image information and the graphic storage by the image detecting unit. Video synthesizing means for synthesizing graphic video information of the means and karaoke video information on the display, voice generating means for generating voice information under the control of the control means, generating means voice information by the voice generating means, singer voice information by a microphone And voice synthesizing means for synthesizing karaoke voice information to the speaker. It is obtained by the.

Further, the image synthesizing means synthesizes the singer image information by the image detecting means with the graphic image information in the graphic storing means, and first image synthesizing information by the first image synthesizing means. It is separated into a second video synthesizing means for synthesizing the karaoke video information on the display, and a chroma key or an averaging device is used for the second video synthesizing means.

Further, an image blocking means of the same color as the background of the singer is provided between the singer and the image detecting means.

[0013]

According to the above-mentioned karaoke system, the image detecting means for detecting the background of the singer and the singer, and the operation of the singer by detecting the movement of the singer by comparing the image information of the singer and the background image information by the image detecting means. Detecting / synthesizing means for synthesizing graphic video information and audio information generated in response to an operation into karaoke video information and karaoke audio information, for example, video storage means, background storage means, control means, graphic storage means, video synthesis means, audio By including the detecting and synthesizing unit including the generating unit and the voice synthesizing unit, the singer image information and the voice information by the singer can be reflected in the karaoke image information and the voice information that are created in advance.

As a result, the singer integrates with the karaoke image information, the singer image information and the display image information on the display and can enjoy while listening to the karaoke voice information, the singer voice information and the generating means voice information which are simultaneously synthesized. it can.

Further, the image synthesizing means is separated into the first image synthesizing means and the second image synthesizing means, and by using, for example, a chroma key or an averaging means in the second image synthesizing means, the display of the synthesized image information is variously performed. Can be changed.
As a result, a wide variety of ways to enjoy the game are possible.

Further, by providing the image blocking means between the singer and the image detecting means, the blocked portion by the image blocking means can be displayed in the same color as the background. This makes it easier to see the karaoke video information.

[0017]

Embodiment 1 FIG. 1 is a schematic configuration diagram showing a karaoke system which is an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing each output video information in the karaoke system of the present embodiment.

First, the configuration of the karaoke system of this embodiment will be described with reference to FIG.

The karaoke system of this embodiment is a karaoke system using a chroma key as a second image synthesizing means of karaoke image information and singer image information, for example, and a display 1 for displaying karaoke image information in which lyrics are combined and this display. A microphone 2 into which the singer inputs a singing voice (singer voice information) according to the lyrics of 1, and a speaker 3 which outputs the singing voice by the microphone 2 in association with karaoke music (karaoke voice information) corresponding to karaoke video information. A video camera (image detection means) 7 for detecting a singer 5 and a background 6 and a singer image information obtained by the video camera 7 are added to the conventional system configuration including the karaoke device 4 for controlling the display 1, the microphone 2 and the speaker 3. And background video information to karaoke video information and audio information. A detection synthesizer (detection combining means) 8 for reflecting and has become an additional configuration.

The video camera 7 has a detection / synthesis device 8 connected to the output side thereof, and detects, for example, an action such as a gesture of the singer 5 and the background 6 on the stage, and the detection / synthesis device 8 is detected.
To the singer image information and background image information. In this case, as the background 6 of the singer 5, for example, a blue screen is used to make the singer 5 stand out.

The detection / synthesis device 8 is connected to the video camera 7, the microphone 2 and the karaoke device 4 on its input side, and is connected to the display 1 and the speaker 3 on its output side. Then, a video memory (image storage means) 9, a background image memory (background storage means) 10, a difference unit 11, a control CPU (control means) 12, a graphic memory (which reflects the singer image information and background image information from the video camera 7) A graphic storage means 13, a first video mixer (first video synthesizing means) 14, a second video mixer (second video synthesizing means) 15, a voice generator (voice generating means) 16 for reflecting the singing voice of the singer 5, and It is composed of a voice mixer (voice synthesizer) 17.

The video memory 9 has an input side connected to the video camera 7, an output side connected to the changeover switch 18, and one side of the changeover switch 18 connected to one of the difference units 11 via the background image memory 10. And the other is directly connected to the other of the difference unit 11. Then, the singer image information by the video camera 7 is stored, and this singer image information is switched to the background image memory 10 and transferred to the difference unit 11. That is, the motion of the singer 5 is stored in the video memory 9 as singer image information in real time.

The background video memory 10 has its input side connected to the video memory 9 via the changeover switch 18, and its output side connected to the difference unit 11. Then, the background image information from the video camera 7, that is, the background information that is the reference when the singer 5 is not on the stage in the initialized state is stored through the video memory 9 by switching the changeover switch 18, and the background image of the reference is stored. Information has been transferred to the differentiator 11.

The difference unit 11 is connected to the video memory 9 via the changeover switch 18 at one of its input sides, the background image memory 10 at the other side, and the control CP at its output side.
It is connected to U12. Then, the background image memory 10
The background image information of the reference stored in is compared with the image information of the singer sequentially stored in the video memory 9, and when the comparison result is equal to or higher than the reference level, the presence of the singer 5 is scattered on the screen in dot units. It is detected in detail and transferred to the control CPU 12 as singer detection information.

The control CPU 12 has a difference unit 1 on its input side.
1 is connected, and the output side is connected to the graphic memory 13 and the sound generator 16. Then, graphic image information, for example, image information in which balloons fly around as shown in FIG. 2B is generated corresponding to the singer detection information by the subtractor 11, and this image information is stored in the graphic memory 13. Further, voice information is generated under the control of the control CPU 12, and this voice information is generated by the voice generator 1.
Has been transferred to 6.

The graphic memory 13 has an input side connected to the control CPU 12 and an output side connected to the first video mixer 14. Then, graphic image information under the control of the control CPU 12 is stored, and this image information is transferred to the first image mixer 14.

The first video mixer 14 has a video camera 7 connected to one of its input sides, a graphic memory 13 connected to the other, and an output side of the second video mixer 1.
Connected to 5. Then, the singer image information from the video camera 7 and the graphic image information from the graphic memory 13 are combined, and the combined first combined image information is transferred to the second image mixer 15.

The first video mixer 14 is connected to one of the input sides of the second video mixer 15, the karaoke device 4 is connected to the other side, and the output side is connected to the display 1. Then, for example, an inset synthesis method using a chroma key is used, and the first image mixer 14
The synthesized video information and the karaoke video information by the karaoke device 4, for example, video information in which clouds are floating in the sky as shown in FIG. 2D and lyrics are synthesized, and the synthesized second synthesized video information is displayed on the display 1. Is transferred to the karaoke video information created in advance, and the singer image information by the movement of the singer 5 and the graphic image information corresponding to this image information are reflected and displayed in real time.

The voice generator 16 has a control CP on its input side.
U12 is connected, and the output side is connected to the audio mixer 17. Then, voice information is generated under the control of the control CPU 12, and this voice information is transferred to the voice mixer 17.

The audio mixer 17 has an input side connected to the audio generator 16, the microphone 2 and the karaoke device 4, and an output side connected to the speaker 3. Then, the voice information by the voice generator 16, the singing voice of the singer 5 by the microphone 2, and the karaoke music by the karaoke device 4 are synthesized, and the synthesized voice information thus synthesized is transferred to the speaker 3, and the karaoke music created in advance, The singing voice of the singer 5 and the voice information of the voice generator 16 corresponding to the movement of the singer 5 are reflected and flowed in real time.

Next, the operation of this embodiment will be described with reference to FIG. 1 and FIG.

First, in the initialized state, the changeover switch 18 is switched to the background image memory 10 side, the background 6 when the singer 5 is not on the stage is detected by the video camera 7, and the background information serving as the reference is stored in the video memory. The image is stored in the background image memory 10 via 9.

Then, the karaoke image information in which the lyrics created in advance are combined is displayed on the display 1, and at the same time, the karaoke music corresponding to this image information is played from the speaker 3. As a result, the singer 5 can sing while watching the lyrics displayed on the display 1 and according to the karaoke music played from the speaker 3.

In this case, the changeover switch 18 is returned from the background image memory 10 side, the operation of the singer 5 is photographed by the video camera 7, and the singer image information is stored in the video memory 9 in real time.

Further, this video information is transferred to the differentiator 11 and compared with the background background video information which is a reference stored in the background video memory 10 in advance. Then, the presence of the singer 5 is detected based on the comparison result of these video information, the graphic video information is generated by the control of the control CPU 12 corresponding to the singer detection information, and the video information is stored in the graphic memory 13.

Then, the operation of the singer 5 detected by the video camera 7, that is, the singer image information a as shown in FIG. 2 (a) is input to the first image mixer 14 in real time. At the same time, the video information stored in the graphic memory 13, that is, the graphic video information b in which the movement of the singer 5 as shown in FIG. 2B is reflected in real time is input to the first video mixer 14.

Furthermore, the singer image information a and the graphic image information b are combined by the first image mixer 14,
The first composite video information c as shown in FIG. 2C is input to the second video mixer 15. At the same time, the second video mixer 1
An image in which lyrics created in advance from the karaoke device 4 are combined, that is, karaoke image information d as shown in FIG.

Then, the second video mixer 15 combines the first composite video information c and the karaoke video information d, and the second composite video information e as shown in FIG. As a result, the singer image information a newly reflecting the movement of the singer 5 in real time on the previously created karaoke image information d, and the graphic image information b corresponding to this image information are reflected in real time. 2 The composite video information e can be displayed on the display 1.

On the other hand, in the voice information, the presence of the singer 5 is detected by the result of comparison between the singer image information and the background image information by the subtractor 11, and the voice information is generated by the control of the control CPU 12 corresponding to the singer detection information. Then
This voice information is output to the voice generator 16.

Then, this audio information is converted into the audio mixer 17
Is output to. At the same time, the singing voice of the singer 5 by the microphone 2 and the karaoke music created in advance from the karaoke device 4 are input to the audio mixer 17 in real time.

Further, the voice mixer 17, the voice information, the singing voice and the karaoke music are synthesized, and the synthesized voice information thus synthesized is outputted to the speaker 3. As a result, the singing voice of the singer 5 is reflected in real time on the conventional karaoke music that has been created in advance, and the synthesized voice information in which the voice information corresponding to the motion of the singer 5 is newly reflected in real time can be played from the speaker 3. it can.

Therefore, according to the karaoke system of the present embodiment, the video camera 7 for detecting the singer 5 and the background 6 in the conventional system, and the singer image information and background image information by the video camera 7 are karaoke image information and music. By adopting a system configuration in which the detection / synthesis device 8 to be reflected on is added to the karaoke image information and voice information created in advance, the operation and voice of the singer 5 can be reflected in real time, so that the singer 5 can display the display 1. You can enjoy while listening to the voice information that is integrated with the karaoke video information and the graphic video information at the same time.

[0043]

[Embodiment 2] FIG. 3 is an explanatory view showing each output video information in a karaoke system which is another embodiment of the present invention, and FIG. 4 is an explanatory view showing a reaction state of the output video information in the karaoke system of this embodiment. is there.

The karaoke system of this embodiment is the same as that of the first embodiment.
Almost similarly to the conventional display 1, microphone 2, speaker 3, and karaoke apparatus 4, a video camera (video detecting means) 7 for detecting the singer 5 and the background 6 and singer video information by the video camera 7 are added to the system configuration. And a detection / synthesis device (detection / synthesis means) 8 for synthesizing and reflecting the background image information on the karaoke image information and the audio information. The difference from the first embodiment is that the singer 5 and the video camera 7 are different from each other. A point where a screen (video cut-off means) 19 is added (shown by a dotted line in FIG. 1) and a point where the graphic video information reacts when the singer 5 touches the graphic video information on the video, and at the same time audio information is output. Is.

That is, as the screen 19 used in this embodiment, for example, a blue screen 19 having the same color as the background 6 of the singer 5 is used, and the portion cut off by the screen 19 is the same as the background 6 on the display 1. It is supposed to be displayed in color.

Therefore, in the karaoke system of the present embodiment, the singer image information as shown in FIG. 3A is displayed in the first image mixer 14, that is, the lower part of the singer 5 blocked by the screen 19 becomes the background 6. Image information of the same color is input in real time, and at the same time, graphic image information in which the movement of the singer 5 as shown in FIG. 3 (b) is reflected in real time is input.

Further, the singer image information and the graphic image information are combined by the first image mixer 14,
The first combined video information as shown in (c) is input to the second video mixer 15, and at the same time the karaoke video information as shown in FIG. 3 (d) is input.

Then, the first video image information and the karaoke video information are combined by the second video mixer 15, and FIG.
The second composite video information as shown in (e), that is, video information in which the lyrics portion of the karaoke video information is not interrupted is displayed on the display 1.

In this case, for example, when the right hand of the singer 5 displayed on the display 1 touches the graphic image information, that is, the balloon flying in the sky in this case, for example, as shown in FIGS. 4 (a) to 4 (b), The graphic image information reacts to the image, and the balloon can be changed into the image information in an explosive state. At the same time, the voice information “bang” that the balloon is broken can be played from the speaker 3.

Therefore, according to the karaoke system of this embodiment, the screen 1 is provided between the singer 5 and the video camera 7.
By adding 9, the movement and voice of the singer 5 are reflected in real time on the karaoke video information and voice information created in advance as in the first embodiment, and in this case, the lyrics are easier to see than in the first embodiment. You can

At the same time, the singer 5
Since it can react according to the action of, it becomes possible to enjoy a wider range.

[0052]

[Third Embodiment] FIG. 5 is an explanatory view showing output image information in a karaoke system which is still another embodiment of the present invention.

The karaoke system of this embodiment is the same as that of the first embodiment.
In the same manner as in (1) and (2), a video camera (image detecting means) 7 for detecting a singer 5 and a background 6 is added to the system configuration of the conventional display 1, microphone 2, speaker 3 and karaoke device 4, and the singer using this video camera 7 It is composed of a detection synthesizing device (detection synthesizing means) 8 for synthesizing and reflecting the video information and the background video information on the karaoke video information and the voice information. The difference from the first and second embodiments is that the karaoke video information and the singer's video. An averaging device is used as the second video mixer (second video synthesizing means) 15 for information.

That is, the second video mixer 15 used in this embodiment is, for example, a synthesizing method using an averaging device, and the first synthetic video information input from the first video mixer 14 and the karaoke apparatus 4 are input. The synthesized karaoke video information is averaged and synthesized, and the synthesized second synthesized video information is displayed on the display 1 in an overlapping manner.

Therefore, in the karaoke system of this embodiment, the singer's video information as shown in FIG. 5A is input to the first video mixer 14 in real time, and at the same time, as shown in FIG.
Graphic video information in which the movement of the singer 5 as shown in (b) is reflected in real time is input.

Further, the singer image information and the graphic image information are combined by the first image mixer 14, and FIG.
The first combined video information as shown in (c) is input to the second video mixer 15, and at the same time the karaoke video information as shown in FIG. 5 (d) is input.

Then, the second video mixer 15 synthesizes the first composite video information and the karaoke video information, as shown in FIG.
The second combined video information as shown in (e), that is, the lyrics of the karaoke video information and the image of the singer are superimposed on each other and displayed on the display 1 in a state where the entire screen is translucent so as to be easily seen.

Therefore, according to the karaoke system of the present embodiment, by using the averaging device as the second video mixer 15, the karaoke video information and the voice information created in advance as in the first and second embodiments can be used by the singer 5. The movement and the voice are reflected in real time, and in this case, the lyrics are easier to see than in the first embodiment, and the whole part can be displayed without blocking the lower part of the singer as in the second embodiment. Since the background 6 is not limited to the single color like 1 and 2, a wider range of ways to enjoy is possible.

Although the invention made by the present inventor has been specifically described based on the first to third embodiments, the present invention is not limited to the above-mentioned embodiments, and various modifications are possible without departing from the scope of the invention. Needless to say, it can be changed.

For example, in the karaoke system of each of the above-mentioned embodiments, the case where the blue screen is used as the background 6 of the singer 5 has been described, but the present invention is not limited to the above-mentioned embodiments, for example, black or the like. It is also possible to use a screen of 1), and it is particularly preferable to use a screen of a single color different from that of the singer 5. It is also possible to use a still image or the like instead of the screen, and particularly in the case of the third embodiment using an averager,
The background 6 does not necessarily have to be a single color, and therefore, it can be well applied when a single color background cannot be created.

Further, the output video information of each of the above embodiments is not limited to the video as shown in FIGS. 2 to 5. For example, an actual singer appears in karaoke video information, and a duet is made with this singer. In the case of such a composite video, various modifications of the composite video are possible.

Furthermore, in each of the above-mentioned embodiments, the case where the karaoke system is configured by adding the first video mixer 14 and the second video mixer 15 of the present invention to the conventional system configuration has been described. It is also possible to incorporate the configuration of the present invention into a karaoke device and integrate them.

By creating the karaoke video information and the music in consideration of the graphic video information and the audio information of the present invention in advance, it is possible to obtain a wide variety of ways to enjoy the game.

[0064]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.
It is as follows.

(1). The singer's motion is detected by the image detection means for detecting the singer and the background of this singer, and the singer's motion is detected by the comparison result of the singer's video information and the background video information by the video detection means, and the singer's motion is dealt with. By providing at least the graphic image information and the voice information generated by the detection synthesizing means for synthesizing the karaoke image information and the karaoke voice information, the karaoke image information and the voice information which are created in advance by the singer. Since the singer image information and the voice information can be reflected, the singer is integrated with the karaoke image information, the singer image information and the display image information on the display, and the karaoke voice information, the singer voice information and the generation means which are simultaneously synthesized. You can enjoy listening to the audio information.

(2). The video synthesizing means synthesizes the singer video information and the graphic video information, and the first video synthesizing means,
It is separated into a second video synthesizing means for synthesizing the first synthetic video information and the karaoke video information, and a chroma key or an averaging device is used for the second video synthesizing means to change the display of the synthesized video information in various ways. Because it is possible, a wide range of ways to enjoy is possible.

(3) By providing the video cutoff means between the singer and the video detection means, the cutoff part by the video cutoff means can be displayed in the same color as the background, so that the karaoke video information can be easily seen. Becomes

(4) By the above (1) to (3), since the singer's motion and voice can be reflected in real time in the karaoke image information and voice information created in advance,
As a playing method, it is possible to obtain a karaoke system that can be enjoyed in a wide range from both of video and audio.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a karaoke system that is Embodiment 1 of the present invention.

FIG. 2 is an explanatory diagram showing each output video information in the karaoke system of the first embodiment.

FIG. 3 is an explanatory diagram showing each output video information in the karaoke system which is Embodiment 2 of the present invention.

FIG. 4 is an explanatory diagram showing a reaction state of output video information in the karaoke system of Example 2.

FIG. 5 is an explanatory diagram showing each output video information in the karaoke system which is Embodiment 3 of the present invention.

[Explanation of symbols]

 1 display 2 microphone 3 speaker 4 karaoke device 5 singer 6 background 7 video camera (video detecting means) 8 detection / synthesis device (detection / synthesis means) 9 video memory (video storage means) 10 background video memory (background storage means) 11 differentiator 12 control CPU (control means) 13 graphic memory (graphic storage means) 14 first video mixer (first video synthesizing means) 15 second video mixer (second video synthesizing means) 16 audio generator (audio generating means) 17 audio Mixer (speech synthesizer) 18 Changeover switch 19 Screen (video interceptor)

Claims (4)

[Claims] 1. A display for displaying karaoke video information in which lyrics are synthesized, a microphone for a singer to input singer voice information in accordance with the lyrics of the display, and singer voice information by the microphone corresponds to the karaoke video information. A speaker that outputs corresponding to karaoke voice information,
A karaoke system comprising a karaoke device for controlling the display, a microphone and a speaker, comprising: video detection means for detecting the singer and the background of the singer; and singer video information and background video information by the video detection means. Detection / combination means for detecting the motion of the singer based on the comparison result, and synthesizing at least the graphic video information and the karaoke video information among the graphic video information and the audio information generated corresponding to the motion of the singer. And a karaoke system characterized in that the singer's video information and voice information by a singer are reflected in the karaoke video information and voice information created in advance. 2. The detecting and synthesizing means stores image data of the singer by the image detecting means, a background storing means of storing background image information by the image detecting means, and a singer image of the image storing means. Control means for controlling in accordance with the result of comparison between the information and the background video information of the background storage means, graphic storage means for storing the graphic video information generated by the control means, and singer video information by the video detection means. A video synthesizing means for synthesizing the graphic video information in the graphic storage means and the karaoke video information to the display, a voice generating means for generating voice information under the control of the control means, and a generating means voice information by the voice generating means , Synthesizes singer voice information from the microphone and karaoke voice information to the speaker The karaoke system according to claim 1, further comprising a voice synthesizing unit. 3. A first video synthesizing means for synthesizing the singer's video information by the video detecting means and the graphic video information in the graphic storage means, the video synthesizing means,
It is separated into a second video synthesizing means for synthesizing the first synthetic video information by the first video synthesizing means and karaoke video information to the display, and a chroma key or an averager is used for the second video synthesizing means. The karaoke system according to claim 1 or 2. 4. The karaoke system according to claim 1, 2 or 3, wherein an image blocking unit having the same color as the background of the singer is provided between the singer and the image detecting unit.