JPS6338786B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention inputs an audio signal component from a video playback device such as a video disc player to an audio playback device, which is a so-called karaoke device, and reproduces the accompaniment sound etc. on the audio playback device, and reproduces the lyrics and lyrics. Musical notes, scenes, etc. are related to a video/audio playback device that is displayed on a television. More specifically, in audio playback devices that use magnetic tape, silver paper is pasted on the magnetic tape of an 8-track tape cartridge to control the end of a song, and this short-circuits the end sensor on the main unit, thereby ending the song. is in control. However, since magnetic tapes are not used in video/audio playback devices, as an alternative to silver paper, a short circuit is formed using the video disc player's muting signal, and this is used to control termination. be.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 is an audio reproducing device such as a so-called commercial karaoke device or an 8-truck car stereo.
A cartridge insertion port 2 is formed at one end of the audio reproducing device 1, and a magnetic head 3 and an end sensor 4 are provided in the cartridge insertion port 2. The magnetic head 3 is connected to a microphone 5 via an amplifier or the like.
and is connected to the mixing circuit 6, and this mixing circuit 6
is further connected to a speaker 8 via a power amplifier 7. Also, the end sensor 4 has a stop circuit 9.
is combined with

Next, 10 is a video disc player as a video playback device, and this player 10 has a video disc insertion slot 11, and is also provided with a video output terminal 12, an audio output terminal 13, and a muting signal terminal 14. . The video output terminal 12 is coupled to a television 15.

Reference numeral 16 denotes an adapter, and the external dimensions of the adapter 16 are the same as those of a known audio cartridge. An audio input terminal 17 and a muting signal input terminal 18 are provided on the input side of the adapter 16, and are connected to the audio output terminal 13 and the muting signal terminal 14, respectively. The audio input terminal 17 of this adapter 16 is connected to a buffer circuit 19 and an equalizer circuit 2.
0, and is connected to a magnetic head 22 facing the front end opening of the adapter 16 via a magnetic head driving amplifier 21. The muting signal input terminal 18 is connected to a one-shot multivibrator 24 via an inverter 23 and further connected to a short circuit 26 via an inverter 25. Specifically, this short circuit 26 includes a transistor 27 and a relay 28 , the coil 29 of this relay 28 is connected to the collector of the transistor 27 , and the contact 30 is connected to the short circuit line 31 .

Next, the operation of the present invention will be explained.

Insert the adapter 16 into the cartridge insertion slot 2 of the audio playback device 1. Then, the magnetic heads 22 and 3 are magnetically coupled to each other, and the end sensor 4 and the short line 31 are brought into contact.

Here, the karaoke disc is inserted into the video playback device 10, the start switch of the audio playback device 1 is turned on, and a predetermined coin is inserted.
Then, the video signal component from the video output terminal 12 is sent to the television 15, and lyrics, music notes, scenes, etc. are displayed. On the other hand, the audio signal component from the audio output terminal 13 is sent to the magnetic head 22 via a buffer circuit 19 in the adapter 16, an equalizer circuit 20, and a head driving amplifier 21. Since this magnetic head 22 is electromagnetically coupled to the magnetic head 3 of the audio reproduction device 1, the audio signal detected by the magnetic head 3 is amplified, passes through the mixing circuit 6 and the amplifier 7, and then an accompaniment sound is emitted from the speaker 8. .

Here, the person holding microphone 5 is
When the user sings the song while looking at the lyrics, musical notes, and scenes of No. 5 and listening to the accompaniment sound from the speaker 8, the audio signal from the microphone 8 is mixed in the mixing circuit 6 and is emitted from the speaker 8 together with the accompaniment sound.

When the performance ends, a High signal is output from the muting terminal 14 in the video playback device 10. This is reversed by the inverter 23, and by falling to low, the one shot multivibrator 24
For example, a pulse of several milliseconds is generated. This pulse is inverted and the transistor 2 of the short circuit 26
Add to the base of step 7. Then, transistor 27
is turned on, relay coil 29 is energized, and contact 3
0 is closed and the shorting line 31 is shorted. Therefore, the end sensor 4 is also short-circuited, the stop circuit 9 is activated, the operation of the audio reproducing device 1 is stopped, the coin is counted down for one song, the adapter 16 is automatically returned, and the player waits for the next play.

In the embodiment described above, a transistor 27 and a relay 28 were used as the short circuit 26. This relay 2
8 is desirable when the polarity of the end sensor 4 is undefined or unknown. However, if the polarity is clear, as shown in FIG.
and a photocoupler 34 formed by a light receiving element 33
It is preferable to use from the viewpoint of current consumption, component cost, etc.

Since the present invention is configured as described above, by inserting a cartridge-shaped adapter into a commercially available karaoke apparatus, the end control coin memory countdown and automatic cartridge return can be used as is. Furthermore, in connection with video equipment and audio equipment that have muting signals, it is possible to link with the end processing of audio karaoke when the audio signal ends.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of a video/audio reproducing apparatus according to the present invention, and FIG. 2 is an electric circuit diagram of another embodiment of the main part. 1... Audio reproduction device, 3... Magnetic head, 4... End sensor, 5... Microphone, 8... Speaker, 9... Stop circuit, 10
...Video playback device, 15...Television, 16...
Adapter, 22...Magnetic head, 24...One-shot multivibrator, 26...Short circuit,
27...transistor, 28...relay, 31...
... Short circuit line, 32 ... Light emitting element, 33 ... Light receiving element, 34 ... Photocoupler.

Claims (1)

[Scope of Claims] 1. The accompaniment audio signal component from the video playback device is played back by the audio playback device via an adapter, and while the video signal component of the video playback device is played back on the television, the accompaniment audio signal component is played back by the audio playback device via an adapter. In a device that mixes and outputs an audio signal from a microphone with a signal, the muting circuit of the video playback device is coupled to a one-shot multivibrator provided in the adapter, and the one-shot multivibrator is connected to the tip of the adapter. A video/audio playback device, characterized in that the device is connected to a short circuit provided facing an end sensor of the audio playback device. 2. The video/audio playback device according to claim 1, wherein the short circuit comprises a transistor operated by the output of a one-shot multivibrator, and a relay driven by the transistor to form a short circuit line. 3. The video/audio playback device according to claim 1, wherein the short circuit is constituted by a photocoupler consisting of a light emitting element operated by the output of a one-shot multivibrator and a light receiving element forming a short circuit line with the light emitting element.