JPH05307831A - Sound switching device - Google Patents

Abstract

PURPOSE:To provide a sound switching device by which a troublesome switching operation or the erroneous discrimination of abnormality due to a forgotten switching are solved and by which reproduced sound signals during reproduction and external sound signals during the time other than reproduction are automatically outputted, in the sound switching device by which sound signals reproduced by a video disk player, etc., and sound signals from the outside are switched for outputting. CONSTITUTION:In the switching part 3, the reproduced sound signals outputted from a sound signal processing part 2 and the external sound signals from the input terminal 1 for the external sound signals are inputted. By the use of the reproduced picture switching signals 8 used at the time of outputting reproduced picture signals and the reproduced sound muting signals 9 used at the time of outputting regenerative signals by a CD, etc., control signals are generated by a control signal generating part 7, and the outputted state of the switching part 3 is controlled. The output signals of the switching part 3 are constituted so that they are added with the external sound signals from the input terminal 6 for microphone sound signals at an adding part 4, applied to a sound outputting part 5, and outputted from a sound output terminal 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio switching device required for switching and outputting an audio signal reproduced from a recording medium such as a video tape recorder or a video disc player and an audio signal input from the outside. is there.

[0002]

2. Description of the Related Art Video tape recorders and video disc players (hereinafter referred to as "players") have a purpose of adding their own singing voice to a performance in accordance with the performance being reproduced (hereinafter referred to as "karaoke"). In particular, since the player uses a disc-shaped recording medium (hereinafter referred to as a disc), it is possible to perform high-speed searching and high-speed cueing, and is rapidly used for karaoke applications. Under such circumstances, the use of karaoke is widespread by the player selecting the reproduction signal of the player and the audio signal from the cable broadcasting or the external device. Therefore, there is an audio switching configuration in which the reproduced audio signal of the player and the audio signal from the cable broadcasting or the external device are selected, the singing voice input by the microphone is added, and the audio signal is output from the output terminal of the player. Is needed.

A conventional voice switching device for a player will be described below. FIG. 5 shows a block diagram of a conventional voice switching device. 5, 1 is an external audio signal input end, 2 is an audio signal processing unit, 4 is an adding unit, 5 is an audio output unit, 6 is a microphone audio signal input end, 10 is an audio output terminal,
Reference numeral 21 is a switching unit, and 22 is a switching SW terminal.

The operation of the conventional voice switching device configured as described above will be described below. In the player, the audio signal processing unit 2 is used by using the reproduction signal from the disc.
Then, the restoration processing of the audio signal is performed and the restored audio signal is output to the switching unit 21. On the other hand, a cable broadcast from the outside or an audio signal from an external device is input from the external audio signal input terminal 1 and added to the switching unit 21. The switching unit 21 selects either the output signal of the audio signal processing unit 2 or the signal from the external audio signal input terminal 1 and outputs the selected signal to the addition unit 4. The addition unit 4 adds the output signal of the switching unit 21 and the signal from the microphone audio signal input terminal 6 and outputs the added signal. The obtained output signal of the addition unit 4 is output from the voice output terminal 10 via the voice output unit 5.

At this time, when outputting the reproduced audio signal of the player, the audio signal processing unit 2 is added to the output signal of the switching unit 21.
The switch SW terminal 22 is switched each time so as to select the signal from the external audio signal input terminal 1 as the output signal of the switching unit 21 in the opposite case. There is.

[0006]

However, in the above-mentioned conventional configuration, since the switching SW terminal 22 is manually operated, the reproduced audio signal is not output depending on the state of the switching SW even when the player is reproducing. And that the playback audio signal is not output due to forgetting to switch it, and that it is erroneously determined to be an abnormal state, and the problem that complicated switching is required when listening to an external audio signal or using karaoke with the playback audio signal Had.

The present invention solves the above-mentioned problems of the prior art. Instead of manual switching means, a reproduced video signal and a reproduced audio mute signal indicating that the disc is being reproduced are used to reproduce the disc. It is an object of the present invention to provide an audio switching device configured to preferentially output a reproduced audio signal and output an external audio signal when not reproducing.

[0008]

To achieve this object, an audio switching device of the present invention comprises a switching means for switching between an external audio signal from the outside and an internal audio signal reproduced internally.
An adding means for adding the output of the switching means and the microphone input signal, an audio output means for generating an audio output signal from the output signal of the adding means, a reproduced video switching signal and a reproduced audio mute signal generated inside the reproducing apparatus. And a control signal generating means for generating a signal for controlling the switching means.

[0009]

With this configuration, since it is possible to automatically set the switching so that the reproduction audio signal is preferentially output during the reproduction by the player and the external audio signal is outputted unless the reproduction state is set, the reproduction audio signal is reproduced during the reproduction. It has the characteristics that the player does not erroneously determine that it is in an abnormal state due to the inconvenience that no signal is output, or that switching is forgotten, and there is no need to switch between the external audio signal and the reproduced audio signal for each use.

[0010]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of a voice switching apparatus of the present invention. In FIG. 1, 1 is an external audio signal input terminal, 2 is an audio signal processing unit, 3 is a switching unit, 4 is an adding unit, 5
Is an audio output unit, 6 is a microphone audio signal input terminal, 7 is a control signal generation unit, 8 is a reproduced video switching signal, 9 is a reproduced audio mute signal, and 10 is an audio output terminal.

The operation of the voice switching device configured as described above will be described below. The audio signal processing unit 2 outputs the audio signal reproduced from the disk as the disk starts to rotate.
And outputs to the switching unit 3. An external audio signal from the external audio signal input terminal 1 is also input to the switching unit 3.

In the case of a player, 30 cm, 20 cm, CV
It is necessary to reproduce various discs such as D and CD.
CDs are digital audio signals only, other discs are required to play both video and audio signals (there are various disks such as analog audio or digital audio only or both analog audio and digital audio). Therefore, the control signal generator 7 uses the reproduction video switching signal 8 used when outputting the reproduction video and the reproduction audio mute signal 9 used when outputting the reproduction signal of the digital audio signal such as CD. A control signal for determining whether or not reproduction is being performed is generated to control the output state of the switching unit 3.

FIG. 2 is an operation explanatory view for explaining the operation of the present invention. FIG. 2a is an operation explanatory diagram when reproducing a disc having a video signal. As video output, a reproduced image is output when the disc is being reproduced, and a composite image called a color back is output when the disc is not being reproduced. Therefore, when reproducing a disc having a video signal, the control signal generation unit 7 needs to generate a control signal so as to switch audio in synchronization with the reproduction video switching signal 8.

FIG. 2b is an explanatory diagram of the operation when reproducing a CD. In this case, since the video output always outputs the color back, the reproduction video switching signal is Low.
It remains in the state. However, in the case of a CD, there is a control signal for outputting a reproduced audio signal during reproduction by a reproduced audio mute signal, and for making a silent (mute) state in other cases. Using this signal, the control signal generation unit 7 generates a control signal for switching the switching unit 3.

2A and 2B, for example, by taking the OR of the reproduced video switching signal 8 and the reproduced audio mute signal 9, the control signal generation unit 7 can create a switching control signal compatible with various discs. ..

The output signal of the switching unit 3 thus obtained is added to the external voice signal from the microphone voice signal input terminal 6 in the adding unit 4 and applied to the voice output unit 5, which is suitable for voice output. Is processed and output from the audio output terminal 10.

As described above, according to this embodiment, the control signal for switching the audio is generated by using the reproduced video switching signal 8 and the reproduced audio mute signal 9, so that the manual switching can be automatically switched. This allows the playback audio signal to be output with priority when the disc is playing, and outputs the external signal when the disc is not playing, so it is possible to eliminate erroneous determination of an abnormal state due to troublesome switching work or forgetting to switch. You can

Needless to say, the output of the switching unit 3 may be directly input to the audio output unit 5 by removing the addition unit 4 and the microphone audio signal input terminal 6 from the above configuration. In that case, switching between the reproduced audio signal and the external audio signal is the same as in the above case, but it becomes impossible to add the audio signals using the microphone.

In the case of a player that does not play a CD,
It is apparent that the control signal generation unit 7 is configured to use only the reproduced video switching signal 8.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a block diagram of a voice switching device showing a second embodiment of the present invention.
In FIG. 3, 1 is an external audio signal input end, 2 is an audio signal processing unit, 3 is a switching unit, 4 is an adding unit, 5 is an audio output unit, and 6
Is a microphone voice signal input terminal, 7 is a control signal generator, 10 is a voice output terminal, and 15 is a motor stop signal. The difference from the configuration of FIG. 1 is that the reproduction video switching signal 8 of FIG. 1 includes a motor stop signal 15 indicating the state of the motor for rotating the disk, instead of the reproduction audio mute signal 9.

The operation of the voice switching device configured as described above will be described below, focusing on the points different from the first embodiment. FIG. 4 is an operation explanatory view for explaining the operation of the second embodiment. The difference from the first embodiment is that the switching signal is synchronized with the rotation of the motor.

As shown in FIG. 4, when the motor starts to rotate, the motor stop signal 15 becomes High, and the control signal generator 7 inputs the control signal to the switching unit 3. As a result, the output of the switching unit 3 becomes the signal of the audio signal processing unit 2.
Similarly, when the motor is stopped, the output of the switching unit 3 outputs the signal of the external audio signal input terminal 1. As described above, by controlling using the motor stop signal, the switching control can be performed regardless of the type of the disk.

As described above, according to this embodiment, the control signal for switching the voice is generated by using the motor stop signal 15, so that the switching can be automatically performed from the manual switching. Thus, the reproduced audio signal is preferentially output during the reproduction of the disc, and the external signal is output during the reproduction, so that the troublesome switching work and the erroneous determination of the abnormal state due to the forgetting of the switching can be eliminated.

[0025]

As described above, according to the present invention, the switching means for switching between the external audio signal from the outside and the internal audio signal reproduced inside, the adding means for adding the output of the switching means and the microphone input signal, By providing a sound output means for generating a sound output signal from the signal of the addition output, and a control signal generation means for controlling the switching means by using the reproduced video switching signal and the reproduced sound mute signal generated inside the reproducing device, This enables automatic switching from manual switching. With this, the playback audio signal is given priority when the disc is playing, and the external signal is automatically output when it is not playing. Therefore, it is possible to realize a voice switching device capable of eliminating troublesome switching work and erroneous determination of an abnormal state due to forgetting to switch.

[Brief description of drawings]

FIG. 1 is a block diagram of a voice switching device according to a first embodiment of the present invention.

FIG. 2 is an operation explanatory view for explaining an operation of the voice switching device according to the first embodiment.

FIG. 3 is a block diagram of a voice switching device according to a second embodiment of the present invention.

FIG. 4 is an operation explanatory view for explaining an operation of the voice arrival switching device in the second embodiment.

FIG. 5 is a block diagram of a conventional voice switching device.

[Explanation of symbols]

 3 switching unit 7 control signal generation unit 8 playback video switching signal 9 playback audio mute signal

Claims (4)

[Claims] 1. An audio switching device for reproducing a video / audio signal from a recording medium, comprising switching means for switching between an external audio signal from the outside and an internal audio signal reproduced internally, and an output of the switching means and a microphone input. The switching means using the adding means for adding the signal, the audio output means for generating the audio output signal from the output signal of the adding means, and the reproduced video switching signal and the reproduced audio mute signal generated inside the reproducing apparatus. And a control signal generating means for controlling the voice switching device. 2. The output of the switching means is directly applied to the audio output means.
The voice switching device described. 3. The audio switching device according to claim 1, wherein the control signal generating means is a control signal generating means for controlling the switching means based on a reproduced video switching signal. 4. An audio switching device for reproducing a video / audio signal from a disk-shaped recording medium, the switching means switching between an external audio signal from the outside and an internal audio signal reproduced internally.
Depending on whether the disc-shaped recording medium is rotating in the reproducing device, an adding means for adding the output of the switching means and the microphone input signal, an audio output means for generating an audio output signal from the output signal of the adding means, A voice switching device comprising: a control signal generating means for controlling the switching means.