JPH09307833A - Audio controller for video equipment and audio control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the audio controller for a video equipment and the audio control method in which audio signals corresponding to a plurality of images are simultaneously heard. SOLUTION: A monitor of this invention is provided with an Lch speaker 1, an Rch speaker 2 and a display screen 3. The audio control circuit of this invention is controlled by using a screen key 5, left and right balance keys 6, 7 of a remote controller 4. Figure A indicates a state of viewing video/audio signals of an 8mm VTR only, figure B shows a state that video signals on two screens and an audio signal of 8mm VTR are viewed, figure C depicts a state that video signals on two screens, a monaural audio signal of 8mm VTR from the Lch speaker and a monaural audio signals of VHSVTR are viewed, and figure D denotes a state of viewing video/audio signals of an 8mm VTR the same as the figure A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video device such as a television receiver, a double cassette video tape recorder (hereinafter simply referred to as "double cassette VTR"), a projector and the like having a multi-screen display and a stereo audio output function. The present invention relates to an audio control device and an audio control method, and more particularly, to an audio control device and an audio control method for a video device which controls stereo audio output in response to multi-screen display.

[0002]

2. Description of the Related Art In recent years, due to the development of electronic technology and the increasing needs of users, complex type products and multifunctional products have been introduced one after another. For example, wide-screen television receivers having an aspect ratio of 16: 9 are widely used in television receivers, and double-cassette VTRs incorporating two types of VTRs are widely used in video tape recorders. These television receivers and double cassette VTRs have a multi-screen display function such as two-screen display and picture-in-picture (picture in picture) by taking advantage of the characteristics of the horizontally long screen. On the other hand, the audio signal is also made into stereo, and it is possible to enjoy stereo sound by incorporating a stereo amplifier and a speaker.

In a television receiver or a double cassette VTR having such a dual-screen display and stereo audio output function, the audio output method corresponding to the dual screen is as follows. The voice corresponding to one of the screens is output and the other voice is not output (first conventional example). 2. Two methods are known, such as outputting the sound corresponding to one screen to the main (output terminal or speaker) and outputting the other sound to the headphone terminal (second conventional example).

However, in the method of the first conventional example, although two screens can be seen, both voices cannot be heard at the same time. The method of the second conventional example requires a headphone circuit. This headphone circuit is
Parts such as an output switch exclusively for headphones, a headphone drive amplifier, a headphone volume control and a headphone terminal are required, and the circuit is complicated and the cost is high. Further, although the sounds of both screens are output, one of them is a speaker and the other is a headphone, which is not suitable for simultaneous viewing. Furthermore, there is a problem that both of the sounds cannot be heard without preparing headphones.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a video device having a multi-screen display and a stereo audio output function.
The present invention relates to a voice control device and a voice control method for a video device, which solves the problem that the voices corresponding to a plurality of screens cannot be heard at the same time and improves user convenience.

[0006]

In order to solve such a problem, a plurality of screens according to the present invention can be simultaneously displayed on one screen, and an audio control device for a video equipment having a stereo output terminal for Lch audio and Rch audio. In, a switching unit (switch element) for switching between a normal Lch sound, a monaural sound output from one of a plurality of screens, and a normal Rch sound and a monaural sound output from the other of a plurality of screens, and a switching unit are operated. And operating means. Then, at the same time as selecting a plurality of screens by the operating means, one monaural sound of the plurality of screens is output to the Lch output terminal and the other monaural sound is output to the Rch output terminal.

In addition, the audio control device of the video equipment includes
Volume control means (volume) for controlling the volume balance of one monaural sound of a plurality of screens and the other monaural sound of a plurality of screens is provided.

Further, in the audio control method for video equipment of the present invention, a normal Lch sound, a monaural sound output from one of a plurality of screens, and a normal Rch sound, and a monaural sound output from the other of a plurality of screens are output. It has a switching step of switching, a volume changing step of controlling the volume balance of one monaural sound of a plurality of screens and the other monaural sound of a plurality of screens, and an operation step of operating these. And
When a plurality of screens are selected by this operation process, one monaural sound of the plurality of screens is instantaneously output to the Lch output unit, the other monaural sound is output to the Rch output unit, and the selection of the plurality of screens is canceled. Then, it is controlled so as to instantly return to the original stereo audio output state. Further, even when a plurality of screens are being output, it is possible to output a stereo sound of any one of the plurality of screens by operating the operation process.

In the audio control apparatus and audio control method for video equipment of the present invention, in addition to the conventional output changeover switch (deck selection switch, etc.) for outputting normal stereo audio,
A switching contact for switching between a normal Lch sound and one monaural sound of a plurality of screens, a normal Rch sound and the other monaural sound of a plurality of screens, and a volume changing means for controlling the balance of these monaural sounds are provided. When is selected, one of the monaural sounds of multiple screens is instantly Lc
Since the output to the h output terminal and the other monaural sound are output to the Rch output terminal, it is possible to simultaneously listen to images and sounds on a plurality of screens without using headphones. Also, by controlling the volume changing means,
It is possible to view and listen to audio that corresponds to multiple screens in an optimal balance.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

First, the configuration of the audio control circuit of the video equipment of the present invention will be described. FIG. 1 is a block circuit diagram showing an embodiment of an audio control circuit of a video equipment of the present invention. A double cassette VTR (a VTR in which an 8 mm VTR and a VHS system VTR are integrated) will be described as an example of the video equipment of the present invention. For simplification, the video system is omitted, and only the audio system is shown in the description.

The voice control circuit of the present invention in FIG.
ch output 11, Rch output 12 and monaural output 13
8 mm VTR audio circuit 10 equipped with the same, VHSVTR audio circuit 20 similarly equipped with Lch output 21, Rch output 22 and monaural output 23, volumes 14 and 24 as volume adjusting means for interlocking sliders, contacts a, b,
It is composed of switching elements 15 and 25, which are switching means provided with c, line amplifiers 16 and 26, and Lch output 17 and Rch output 27.

The operation of the audio control circuit of the video equipment of the present invention having such a configuration will be described.

In FIG. 1, an audio circuit 1 of 8 mm VTR
The respective sounds are output from the Lch output 11 of 0, the Rch output 12, and the monaural (either L + R or L, Rch) output 13. Similarly, respective sounds are output from the Lch output 21, the Rch output 22, and the monaural output 23 of the audio circuit 20 of the VHSVTR.

These audio signals are recording monitor (EE) signals, reproduction (PB) signals, etc. in the audio circuits. The signal level of each audio circuit is adjusted to be the same level for a broadcast signal or the like having the same degree of modulation. In addition, the monaural audio circuit is R
Since it is always provided for F-MOD (antenna) output, the description here is omitted.

Then, the voice control circuit of the present invention is 8 millivolts.
When outputting TR stereo sound, switch element 1
5, 25 are respectively connected to the contact a, and the line amplifier 16,
It is output to the Lch output 17 and the Rch output 27 via 26, respectively.

Similarly, when outputting VHSVTR stereo sound, the switch elements 15 and 25 are respectively connected to the contact points c, and Lc via the line amplifiers 16 and 26.
It is output to the h output 17 and the Rch output 27, respectively. Further, even when the image is displayed on two screens, if either one of the sounds is good, by selecting the contact a or the contact c of the switch elements 15 and 25 as described above, the sound of the person who wants to hear is selected. To be done.

The feature of the present invention is that, in addition to these two types of selection means, for example, a contact (b) capable of outputting a voice of 8 mm VTR to the Lch output 17 and a voice of the VHSVTR to the Rch output 27 at the same time. ) Is newly added.

That is, when the switch elements 15 and 25 respectively select the contact (b), the Lch output 17 has an 8 mm VTR monaural terminal 13 as shown in FIG.
The monaural sound of is adjusted in volume by the volume 14 and output. Similarly, Rch output 27 has VHSVTR
The monaural sound of the monaural output 23 is output after the volume is adjusted by the volume 24.

In the volumes 14 and 24, sliders interlocking with each other slide between the terminals d, e and f. Here, the position of the terminal d is a point at which the volume of 8 mm VTR becomes maximum and the volume of VHSVTR becomes minimum. The position of the terminal e is 8 mm VTR volume and VHSV.
This is the point where the TR volume becomes the same level. Further, at the position of the terminal f, the 8 mm VTR volume becomes the minimum, and the VHS
This is the point where the VTR volume becomes maximum.

That is, the user controls the volumes 14, 24.
By arbitrarily operating, two types of video and audio,
It can be viewed at the same time according to the desired volume level. Although the voice control circuit of the present invention is shown as a variable resistor for easy understanding, a variable amplification amplifier may be used. Further, the circuit configuration of the present invention is not limited to the one described above, and other configurations having similar functions such as digital control by an electronic volume controlled by a DSP (Digital Signal Processor) may be used. Is natural.

Next, the control method of the voice control circuit of the present invention will be described with reference to FIGS. 1 and 2. FIG. 2 is an explanatory diagram for explaining the control method of the audio control circuit of the video equipment of the present invention. FIG. 2A shows a state in which only 8 mm VTR video / audio is being viewed, and FIG. The sound is 8 millivolts on the screen
While watching TR, in Fig. C, the image is Lc with two screens.
While listening to 8 mm VTR monaural sound from the h speaker and VHS VTR monaural sound from the Rch speaker, Fig. D returns to the original state and the 8 mm VTR image is displayed.
It is a figure which shows the state which is watching the audio | voice.

As an example of a video device equipped with the audio control circuit of the present invention, a monitor device to which the double cassette VTR shown in FIG. 1 is connected will be described as an example. This monitor device includes an Lch speaker 1, an Rch speaker 2 (not shown) and a display screen 3. The control states A to D of the monitor device all show the display screen 3 of the same device.

The control of the voice control circuit of the present invention is performed by, for example, a screen key 5 of a remote controller (only a part of which is shown) 4.
The balance key is operated by the left 6 and right 7 keys.
In conjunction with the operation of the screen key 5, the volume 14 and 2 of FIG.
4 is controlled. That is, the sliders of the volumes 14 and 24 of FIG. 1 are controlled to move to the contact f side in conjunction with the left 6 of the balance key, and the sliders of the volumes 14 and 24 are associated with the right 7 of the balance key. Is controlled to move to the contact point d side.

FIG. 2A shows a state in which the video / audio only on the 8 mm VTR side is being viewed. At this time, the switch elements 15 and 25 of FIG. 1 are connected to the contact a, and the volumes 14 and 24 are disabled.

When the user presses the screen key 5 of the remote controller 4, the state shown in FIG. 2B is entered. In this state,
The image has two screens, but the switch elements 15 and 25 in FIG.
Remains connected to the contact a, so that only the 8 mm VTR sound is emitted from the Lch speaker 1 and the Rch speaker 2.

When the user presses the left key 6 and the right key 7 of the balance key, the switch elements 15 and 25 shown in FIG. 1 are switched to the contact (b) and the state shown in FIG. In this state, the image remains on the two screens, and a display showing the balance state of the volumes 14 and 24 appears at the bottom of the image. The sliders of the volumes 14 and 24 are located at the position of the contact point e, and 8 mm VTR monaural sound from the Lch speaker 1 and VHSV from the Rch speaker 2 are output.
TR monaural sound is emitted at the same volume.

Further, if the left key 6 of the balance key is kept pressed, the sliders of the volumes 14 and 24 in FIG. 1 move to the contact point d side, the volume of the VHSVTR monaural sound decreases, and the 8 mm VTR monaural sound becomes louder. Finally, when the sliders of the volumes 14 and 24 reach the contact point d, Lc
Only the 8 mm VTR monaural sound can be heard from the h speaker 1.

On the contrary, if the right side 7 of the balance key is kept pressed, the slider positions of the volumes 14 and 24 reach the contact point f, and the monitor device outputs VHSV from the Rch speaker 2.
Only the TR monaural sound can be heard. Of course, the volume balance can be freely changed from any slider position by pressing any button of the balance key.

Even when two screens are being output, if any deck is selected by the deck selection switch (not shown) provided separately in the remote controller 4, the switch elements 15 and 25 in FIG. 1 are switched, You can restore the stereo sound of the selected deck. That is, 8 mm V
If you select TR, the two-screen video remains
It can be returned to the stereo sound of the milliVTR (state in FIG. 2B). That is, it is possible to select only the output voice.

When the user presses the screen key 5, the switch elements 15 and 25 shown in FIG.
Both the sound returns to the 8 mm VTR side, and the 8 mm VTR image and stereo sound can be viewed on the monitor device (state of FIG. 2D).

At this time, if VHSVTR is selected by the deck selection switch described above, the switch elements 15 and 25 are switched to the contact c, and the video / audio on the VHSVTR side can be viewed. Since the control of this deck selection switch is the same as the conventional double cassette VTR,
The description here is omitted.

The present invention is not limited to the above embodiments, and various embodiments can be adopted. For example, the double cassette VTR has been described as an example in the present embodiment, but the two types of video / audio output systems illustrated are 8 mm VTR and VTR.
The present invention can be applied not only to the HSVTR but also to any image sound reproduction or recording / reproduction device. Of course, this part is two T
Considering a V tuner or an external input, a case where the present invention is incorporated in one television receiver may be considered. In that case, it may be considered that the Lch output and the Rch output are finally connected to the Lch speaker and the Rch speaker, respectively. Further, the display form of the monitor device is not limited to two screens, and can be applied to picture-in-picture or picture-and-picture. Further, it goes without saying that the present invention can be developed into various forms without being limited to the embodiment described above.

[0034]

As described above, according to the audio control device and audio control method for video equipment of the present invention, in addition to the conventional output changeover switch (deck selection switch) for outputting normal stereo sound, Switching means for switching between the Lch sound and one of the plurality of screens of monaural sound, and the normal Rch sound and the other of the plurality of screens of monaural sound;
A volume changing means for controlling the volume balance of these is provided,
When multiple screens are selected, one monaural sound of multiple screens is output to the Lch output terminal instantly and the other monaural sound is output to the Rch output terminal. It becomes possible.
Further, by controlling the volume varying means, it is possible to view the sounds corresponding to the plurality of screens in the optimum balance.

Further, the audio control device and the audio control method for the video equipment according to the present invention can be configured only by adding the switching means and the volume varying means, so that the headphone circuit of the second conventional example is constituted. Therefore, it can be realized at a cost of less than half.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing an embodiment of an audio control circuit of a video device of the present invention.

FIG. 2 is an explanatory diagram for explaining a control method of an audio control circuit of a video device of the present invention, FIG. A is a state in which only 8 mm VTR video / audio is being viewed, and FIG. Two
On the screen, the audio is watching the 8 mm VTR, the same figure C
Is a state where the user is watching the 8mm VTR monaural sound from the Lch speaker and the VHS VTR monaural sound from the Rch speaker on the two screens. It is a figure showing the state where it is.

[Explanation of symbols]

1 ... Lch speaker, 2 ... Rch speaker, 3 ... Display screen, 4 ... Remote controller, 5 ... Screen key, 6 ... Balance key left, 7 ... Balance key right, 10 ... 8 mm VTR audio circuit, 20 ... VHSVTR voice circuit, 1
1, 21 ... Lch output, 12, 22 ... Rch output, 1
3, 23 ... Monaural output, 14, 24 ... Volume, 1
5, 25 ... switch element, 16, 26 ... line amplifier,
17 ... Lch output, 27 ... Rch output

Claims (6)

[Claims] 1. A sound control device for a video device, which is capable of displaying a plurality of screens simultaneously on one screen and has a stereo sound output terminal for Lch sound and Rch sound, wherein a normal Lch sound and one of the plurality of screens are provided. A monophonic sound output by the user and a normal Rch sound, and a monaural sound output by the other of the plurality of screens, and an operating means for operating the switching means. At the same time as selecting a screen, one monaural sound of the plurality of screens is output to the Lch output terminal, and the other monaural sound of the plurality of screens is Rc.
An audio control device for a video device, which outputs to an h output terminal. 2. The audio control device of the video equipment comprises a volume varying means for controlling the volume of one monaural sound of the plurality of screens and the other monaural sound of the plurality of screens. 1. An audio control device for video equipment according to 1. 3. The audio control device of the video equipment is capable of outputting stereo audio of any one of the plurality of screens by operating the operating means even while outputting the plurality of screens. An audio control device for a video device according to claim 1, wherein: 4. The video equipment is at least one of a video tape recorder device, a double cassette video tape recorder device, a television receiver, a monitor device, a projector device, and a large screen display device. An audio control device for a video device according to claim 1 or 2. 5. A sound control method for a video device, which is capable of displaying a plurality of screens simultaneously on one screen and is provided with a stereo sound output unit for Lch sound and Rch sound, comprising a normal Lch sound and one of the plurality of screens. Of the monaural sound output by the user and the normal Rch sound and the other monaural sound output by the other of the plurality of screens, and a volume of one monaural sound of the plurality of screens and the other monaural sound of the plurality of screens. And a volume changing step of controlling the volume changing step, and an operation step of operating the switching step and the volume changing step. When the plurality of screens are selected by the operation step, one of the monaural sounds of the plurality of screens is instantly output. It outputs to the Lch output section, and the other monaural sound of the plurality of screens is Rch.
A voice control method for a video device, comprising: outputting to an output unit; and controlling to restore the original state instantly when the selection of the plurality of screens is released. 6. The video according to claim 5, wherein even if the plurality of screens are being output, it is possible to output a stereo sound of one of the plurality of screens by operating the operation step. Voice control method for equipment.