JP2001333500A - Av equipment and audio input method for the av equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an AV equipment in which the L/MONO function can be realized by software processing, and to provide an audio input method for the AV equipment. SOLUTION: The AV equipment 10 is provided with an audio input terminal 21 consisting of a left side connection terminal 22a and a right side connection terminal 23a that receives an external audio signal. When a stereo audio signal or a monaural audio signal is given respectively to the left side connection terminal 22a and the right side connection terminal 23a, the AV device 10 outputs a stereo audio output or a monaural audio output with an audio signal processing section 26 having a storage means 27 storing a program 28 for selection control processing through arithmetic operations, and is provided with a signal changeover means 25 that receives a control command from the audio signal processing section 26, and an audio processing means 24 that processes an audio signal outputted from the signal changeover means 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AV device in which the L / MONO function of the AV device is realized by software without using hardware, and to a sound input method of the AV device.

[0002]

2. Description of the Related Art In general, AV equipment supporting stereo sound has a stereo terminal L terminal and an R terminal as sound terminals. Such an AV device outputs a sound (in this specification, a sound including a sound of a musical instrument and a voice of a human being is referred to as a sound).
Is input, there are a stereo sound input and a monaural sound input. In the case of stereo sound input, there is no problem because the sound is input from both terminals by connecting to the L terminal and the R terminal.
Audio is input only from the terminal side, and this audio is distributed to the channel on the L terminal side and the channel on the R terminal side.
Generally, a function called "MONO" is mounted on AV equipment.

Usually, in order to realize this function, an L / MONO compatible input terminal having a built-in switch for automatically switching between a stereo sound input and a monaural sound input is often used.

[0004]

The input terminal corresponding to L / MONO described above realizes switching between stereo sound input and monaural sound input by a mechanical structure having a switch. However, when the L / MONO function is realized by such a mechanical configuration, a special input terminal is required, and the manufacturing and the like are costly.
Not preferred. In addition, the configuration becomes complicated by the provision of the special input terminal.

[0005] The present invention has been made based on the above circumstances, and an object thereof is to provide an AV apparatus and an A / V apparatus capable of realizing an L / MONO function by software processing.
It is intended to provide a voice input method for V equipment.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an audio system comprising a left-side connection terminal for a left-side audio and a right-side connection terminal for a right-side audio to which an external stereo audio signal can be input. In an AV device having an input terminal,
When a monaural audio signal is input to either the left connection terminal or the right connection terminal, the internal signal path is switched by software to convert the input monaural audio signal to the left and right connection terminals for output. Are configured to be able to output from both.

Therefore, even when a monaural audio signal is input from either the left connection terminal or the right connection terminal, both the left and right outputs can be made to correspond to the monaural audio output by the control including the signal switching means.
For this reason, even if the input is monaural sound, a stereo feeling can be obtained.

In another aspect of the present invention, an audio signal input terminal having a left connection terminal for left audio and a right connection terminal for right audio to which a stereo audio signal from the outside can be input is provided.
In the V device, when either the stereo audio signal or the monaural audio signal is input to each or one of the left connection terminal and the right connection terminal, an audio signal determination unit that determines the type of the audio signal by a determination process; A signal switching unit for selectively switching an output from the audio signal determination unit to either a stereo audio output or a monaural audio output based on a result of the determination by the audio signal determination unit, and an audio for processing an audio signal output from the signal switching unit And processing means.

According to the present invention, when either a stereo audio signal or a monaural audio signal is input, the audio signal discrimination means determines whether the output from the stereo audio signal or the monaural audio signal is a stereo audio output or a monaural audio output. After that, based on the result of this determination, the output from this is selectively switched to either a stereo signal output or a monaural audio output by the signal switching means.
This makes it possible to appropriately obtain a stereo audio output or a monaural audio output without using a mechanical configuration such as an L / MONO-compatible input terminal.

Therefore, the cost can be reduced as compared with the case where a mechanical structure such as an input terminal compatible with L / MONO is used. Further, since it is not necessary to provide a mechanical configuration, the configuration can be simplified accordingly. This can contribute to downsizing of the device and the like.

In another invention, the signal switching means includes:
When a monaural audio signal is input to either one of the input connection terminals, the left and right audio outputs are controlled to monaural audio output for outputting a monaural audio signal.

According to the present invention, even when a monaural audio signal is input from either the left connection terminal or the right connection terminal, both the left and right outputs can be made to correspond to the monaural audio output by the control including the signal switching means. Becomes For this reason, even if the input is monaural sound, a stereo feeling can be obtained.

In another aspect of the present invention, the audio signal discriminating means includes a storage means for storing a discriminating processing procedure for discriminating between a stereo sound signal and a monaural sound signal.

For this reason, after the audio signal discriminating means judges whether the input audio signal is a stereo audio signal or a monaural audio signal, the signal switching means is actuated based on the discrimination result to output a stereo audio output or a monaural audio signal. Either of the outputs can be selectively output. In this case, various signals can be switched only by rewriting the determination processing procedure stored in the storage means.

Further, in another invention, in addition to the above-mentioned invention, the monaural audio signal is a monaural audio signal input from the left connection terminal.

According to the present invention, when the monaural audio output is controlled to the input left audio, the L / MONO function normally provided in the AV equipment corresponding to the stereo audio is provided.
This can be realized without using any input terminal corresponding to this function.

[0017] Further, in addition to the above-mentioned inventions, other inventions include:
The sound signal input from the sound input terminal can be switched and selected by the sound recording prevention means.

According to the present invention, the provision of the recording prevention means makes it possible to switch and select whether or not to record the input voice. For this reason, it is possible to prevent software from being mistakenly further recorded on a recorded tape or the like.

Still another aspect of the present invention is a sound input method of an AV device capable of distributing a stereo sound input or a monaural sound input to a plurality of output sides and outputting the same. And a setting step of setting whether or not to make it possible to simultaneously output the monaural sound to a plurality of output sides.

Therefore, when monaural sound is input, it is possible to freely set whether or not monaural sound is simultaneously output to the output side as desired.

According to another aspect of the present invention, there is provided an audio input method for AV equipment capable of distributing a stereo audio input or a monaural audio input to a plurality of output sides and outputting the audio output. An audio signal input step, a signal detection step of detecting the audio signal when an audio signal is input in the external audio input step, and an audio signal determination step of determining a type of the audio signal detected in the signal detection step. , Based on the determination result in the audio signal determination step,
It comprises a signal switching step of selectively controlling the output from the output to a stereo sound output or a monaural sound output, and a sound processing step of processing a sound signal output from the signal switching means.

For this reason, even if a mechanical configuration such as an L / MONO-compatible input terminal is not used, the audio signal is output in the signal switching step based on the audio signal determination result in the audio signal determination step. Is switched, stereo audio output or monaural audio output can be appropriately switched and output based on arithmetic processing such as a program.

According to another aspect of the present invention, in addition to the above-described audio input method for AV equipment, when a monaural audio signal is input in the signal switching step, all of the plurality of outputs are converted to the input monaural audio signal. It is controlled to output monaural audio as a signal.

Therefore, in the signal switching step, it is possible to cope with monaural sound output by control. Moreover, since all outputs are input monaural audio signals, even if monaural audio is input,
A stereo feeling can be obtained.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a VCR of Hi-Fi (high fidelity) as an example of an AV device supporting stereo sound.
(Video cassette recorder)
FIG. 2 is a schematic diagram showing a configuration of a zero. As shown in FIG. 1, the in-vehicle VCR 10 includes a video main body 11, a tape insertion slot 13 provided on a front surface 12 of the video main body 11, and switches 14 for performing various operations. Also,
As shown in FIG. 2, a DC jack 16 for taking in an external power supply is provided on a back surface 15 of the video main body 11. Thereby, various mechanisms existing inside the video main body 11 can be driven.

In addition, a video /
An audio input terminal 17 and a video / audio output terminal 18 are provided alongside the audio input terminal 17. Of these, the video / audio input terminal 17 is connected to, for example, an external video camera 41 through an AV cable 1 as shown in FIG.
The video and audio information is taken into a video tape or the like inserted therein via connection means such as 9. The video / audio output terminal 18 is connected to, for example, a television monitor 42 or the like via connection means such as the AV cable 19 or the like. Thus, the video / audio information reproduced inside the video main body 11 can be displayed on a television monitor or the like.

As shown in FIG. 4, each of the video / audio input terminal 17 and the video / audio output terminal 18 comprises a video connection terminal 20 and an audio connection terminal 21 including an audio input terminal. The video connection terminal 20 is normally colored so as to be distinguishable in yellow.
The audio connection terminal 21 includes a left connection terminal 22 (Lch) for left audio and a right connection terminal 23 for right audio.
(Rch). Left connection terminal 22
Are colored white, and the right connection terminal 23 is colored red.

In the following description, the left connection terminal 22 and the right connection terminal 23 on the video / audio input terminal 17 side are represented as an input left connection terminal 22a and an input right connection terminal 23a, respectively. Similarly, the left connection terminal 22 and the right connection terminal 23 on the video / audio output terminal 18 side are represented as an output left connection terminal 22b and an output right connection terminal 23b, respectively. Further, the video connection terminals 20 and the audio connection terminals 21 are similarly connected to the video connection terminals 20a and 20b and the audio connection terminals 21.
a and 21b.

Also, in the video main unit 11, FIG.
As shown in (a) and (b), an audio processing system mechanism 24 is provided as audio processing means for processing an input audio signal. As a result, the audio signal input from the audio connection terminal 21a can be processed and recorded on an internal video tape or output as appropriate audio.

A signal detecting means 40 for detecting an audio signal and a signal switching device 25 as a signal switching means are interposed between the audio processing system mechanism 24 and the audio connection terminal 21a. The signal detection means 40
It is connected to the MPU 29. Thereby, the signal detected by the signal detecting means 40 is sent to the MPU 29, and the MPU 29 determines the type of the signal.

In the MPU (CPU) 29, when the in-vehicle VCR 10 is activated and the program 28 is started to be in a state suitable for performing audio processing, an audio signal processing unit is provided therein. 26 are provided. The audio signal processing unit 26 switches the audio signal.
The configuration is such that the ROM 27 as storage means and the R
It has a program 28 stored in the OM 27. The audio signal processing unit 26 and the MPU 29 that actually performs the arithmetic processing constitute an audio signal determination unit.

The MPU 29 is connected to the signal switching device 25. Signal switching device 2
Reference numeral 5 denotes a switch that operates according to the result of the determination of the audio signal in the audio signal processing unit 26 to switch the audio signal. Thus, when an audio signal is input here, the type of the audio signal is output after being appropriately controlled.

The MPU 29, the ROM 27 and the R
The program 28 for realizing the L / MONO function stored in the OM 27 is configured as one IC 43 as a one-chip microcomputer. And this IC43
Is connected to the signal switching device 25 and the signal detecting means. That is, the above-described audio signal processing unit 2
6. The MPU 29 is configured as one IC 43 in the form of a one-chip microcomputer. With this configuration, when the in-vehicle VCR 10 operates, the RO is immediately
The program 28 stored in M27 is started, and
The audio signal is determined by the arithmetic processing in the PU 29.

However, instead of providing the one-chip microcomputer-like IC 43 in this manner, the program 28 is stored in an external storage device such as a hard disk together with a program for performing a plurality of other operations, for example. It does not matter even if it is in the state. Even when the program 28 is stored in the external storage device and the program 28 is read from the external storage device and activated as described above, it is possible to provide a configuration having the same function as the IC 43 described above.

The result of the discrimination of the audio signal is transmitted to the signal switching device 25, and the signal switching device 25 is configured to perform control processing to be described later on the audio signal according to the type of the audio signal. ing. The signal switching device 25 is configured to output an appropriate audio signal to the audio processing system mechanism 24 by switching to an appropriate audio signal type.

After being processed by the audio processing mechanism 24, a signal is sent to, for example, a speaker (not shown) and output as an audio output, or sent to another audio processing circuit and recorded on a video tape. Or it is possible. A left transmission line 30 and a right transmission line 31 are provided between the signal switching device 25 and the audio processing system mechanism 24.

Further, by applying the above-described configuration, it is also possible to provide a configuration having a function of preventing recording such as recording. In this case, as shown in FIG.
U) 29, when the in-vehicle VCR 10 operates, the ROM
The recording prevention program 32 stored in 27 is started. Thereby, the recording prevention processing unit 3 is stored in the MPU 29.
3 exists.

When the recording prevention program 32 is activated, and when recording is prohibited (REC INHIBIT YES) by an initial operation on a display screen (not shown), the recording prevention processing unit 33 inputs the recording. Prohibit recording of incoming audio signals by software. Recording is possible by initial operation (REC INHIBIT N
When set to O), the above-described recording prevention processing unit 33 enters a state where recording of the input audio signal can be performed by software. The setting of recording prohibition / recording enabled by this initial operation can be switched on the display screen at any time.

Thus, the ROM 27, the ROM
The recording prevention program 32 stored in the storage 27, the ROM 27, the recording prevention processing unit 33 having the recording prevention program 32, and the MPU 29 constitute recording prevention means. As a result, the recording function 3
Even if 4 operates, a control command from the recording prevention processing unit 33 is transmitted so that the operation is immediately stopped.

The MPU 29, the ROM 27, and the recording prevention program 3 stored in the ROM 27
2 is also configured as one IC 43 as one IC 43. However, an external storage device such as a hard disk may be provided and the recording prevention program 32 may be stored in the external storage device, instead of being configured in the IC 43 in the form of a one-chip microcomputer.

The VCR 1 for a vehicle having the above configuration
The operation of 0 will be described below.

First, stereo audio is input from the audio connection terminal 21a on the video / audio input terminal 17 side.
FIG. 5A shows a case where the stereo input function is activated.
It will be described based on. In this case, the left connection terminal 22a
The right connection terminal 23a and the right connection terminal 23a are both connected to an AV cable or the like, and audio stereo input is performed. The stereo audio input signal is input to the signal detection means 40.

When an audio signal is input to the signal detection means 40, the audio signal is detected. Then, the detected audio signal is input to the IC 43 (MPU 29). IC43
In the audio signal processing unit 26 in a state in which the program 28 stored in the ROM 27 is activated, the type of the audio signal, such as input from which terminal, stereo or monaural, is determined. , MPU 29.

Then, according to the type of the audio signal obtained by this determination, the determination result is transmitted from the MPU 29 to the signal switching device 25 or a control command is issued. According to the transmission of this determination result or the control command, the signal switching device 25 switches the audio signal to an appropriate audio signal and transmits it to the audio processing system mechanism 24. That is, when the audio signal processing unit 26 determines that a stereo audio input signal is being input, a left audio signal is emitted from the left transmission path 30, and a right transmission path 3
From 1, the right audio signal is emitted. Then, the left audio signal and the right audio signal are transmitted to the audio processing system mechanism 24, respectively.

Subsequently, the video / audio input terminal 17
FIG. 5 shows a case where monaural sound is input from the audio connection terminal 21a on the side and the L / MONO function is activated.
Description will be made based on (b). In this case, only the left connection terminal 22a is connected to an AV cable or the like, and audio monaural input is performed. Then, this monaural audio input signal is first input to the signal detection means 40, and an audio signal is detected.

Then, the detected audio signal is output to the IC 43
(MPU 29). When an audio signal is input to the IC 43, the audio signal processing unit 26 in a state where the program 28 stored in the ROM 27 is activated
The type of the audio signal is determined by the arithmetic processing in 29. Then, according to the type, the determination result is transmitted from the MPU 29 to the signal switching device 25 or a control command is issued. When a monaural audio input signal is input by the audio signal switching processing in the signal switching device 25 based on this command, only the left audio signal is output from both the left transmission path 30 and the right transmission path 31. Then, the left audio signal is transmitted to the audio processing system mechanism 24.

That is, when a monaural audio input signal is input, the audio signal output from the signal switching device 25 to the audio processing mechanism 24 is transmitted to the left transmission path 30.
5 (b), both the left transmission line 30 and the right transmission line 31 are shown as L in FIG. 5 (b).
Only.

Note that the stereo input function and L / MON
It may be possible to set any of the O functions. In this case, it is not determined whether the input is stereo or monaural. For example, when stereo sound is input to the signal switching device 25 set to the L / MONO function, that is, when the AV cable 19 or the like is connected to the left connection terminal 22a and the right connection terminal 23a and stereo sound is input. The type of the audio signal is determined by the program 28 in the ROM 27. Thereafter, in response to a command from the MPU 29, the signal switching device 25 causes the two transmission paths 30,
Only the left audio signal is output from 31 first.

The program 28 in the ROM 27
FIG. 7 shows the control specifications. In this control specification, the control states of the input side and the output side when the stereo input function is activated and when the L / MONO function is activated are displayed. This figure shows an example of the output result of variously selecting the audio signal on the input side when the stereo function operates. Therefore, other control may be performed on the input side and the output side. In this figure, (L) indicates a left input (output),
(R) indicates a right input (output).

As shown in FIG. 7, in the case of a stereo audio input, the output can be set in advance. That is, "LR" in which both the left and right terminals 22 and 23 respectively function, "L" in which only the left connection terminal 22 functions, "R" in which only the right connection terminal 23 functions, and "LR" in which both the terminals 22 and 23 function. The input function is maintained or the output is the sum of the left and right sounds.
One of the two settings is possible. In the case of "MONO", even if the input is stereo, the MO
Output as NO.

When a monaural audio signal is input, L / MONO is automatically set to L / MONO.
/ MONO function can be set, and only the left-side Hi-Fi sound is output from both left and right terminals 2
2b and 23b and recorded on a video tape or the like. In the case of normal stereo sound as well, both terminals 22
Only the left voice is output from b and 23b. At this time, only the left audio is recorded on both the Hi-Fi track and the NORMAL track. When monaural sound is input, it is connected to the left connection terminal 22a, and the sound signal is output from both ends 22b and 23b.

If the user does not wish to record on a video tape or the like, the user can automatically operate the recording prevention switch and the operation buttons on the operation panel of the AV while checking them on the display screen. The recording is prohibited by the recording prevention processing unit 33 including the ROM 27, the recording prevention program 32, and the MPU 29, and the input audio signal is software-inhibited. Thus, the recording prevention processing unit 33 controls the recording function 34 so as not to perform the recording operation, thereby preventing recording on a recording medium such as a video tape or recording.

It is to be noted that whether or not such a voice input is a stereo voice input or an L / MONO voice input is displayed on the menu screen, and the operation control status of the recording function 34 is displayed on the menu screen. It may be configured.

According to the in-vehicle VCR 10 having such a configuration and the voice input method using the same, the voice signal processing unit 26 configured to store the program 28 for realizing the L / MONO function in the ROM 27 is used. With the provision, the L / MONO function can be realized without providing any special input terminal corresponding to L / MONO.

In this case, in the present invention, since the L / MONO function can be realized by the program 28 stored in the ROM 27, the R / MONO function and any terminal can be realized by merely rewriting the contents of the program 28. Even if monaural sound is input to the left and right connection terminals 22b, 2
The function of outputting monaural sound from 3b can also be realized. That is, various functions can be realized as compared with the case where the L / MONO function is realized by mechanical means such as providing an input terminal compatible with L / MONO.
The degree of freedom of function selection is increased.

In comparison with the L / MONO-compatible input terminal, a program 28 is stored in the ROM 27 and an audio signal processing section 26 is provided. As a result, it is possible to reduce costs without requiring special parts.

Further, since the L / MONO function is realized by software, the configuration is simplified, which can contribute to downsizing of the AV equipment.

Also, in the case where recording or recording is prevented, the recording prevention can be realized by software by the recording prevention program 32 and the recording prevention processing unit 33. For this reason,
The cost can be reduced, and the configuration can be simplified.

The embodiment of the present invention has been described above, but the present invention can be variously modified in addition to the above. This is described below. In the above embodiment,
Although the AV device such as the in-vehicle VCR has been described, the present invention may be applied to other AV devices, or the present invention may be applied to an AV portion incorporated in a personal computer or the like. In such a case, a personal computer or the like is the AV device referred to in the present invention.

Further, in the above-described embodiment, the description has been made of the two-channel stereo. However, an AV having an audio input terminal for stereo audio of two or more channels such as four channels.
The present invention can be applied to a device.

[0062]

As described above, according to the present invention,
Since the L / MONO function can be realized by software, the cost can be reduced and the configuration can be simplified.

In another invention, when either a stereo audio signal or a monaural audio signal is input,
After determining whether the output from this is either a stereo sound output or a monaural sound output by the sound signal discriminating means, based on the result of this discrimination, the output from here is converted to a stereo signal output or monaural sound output by the signal switching means. The selection is switched to one of the outputs. This makes it possible to appropriately obtain a stereo audio output or a monaural audio output without using a mechanical configuration such as an L / MONO-compatible input terminal.

Therefore, the cost can be reduced as compared with the case where a mechanical structure such as an input terminal compatible with L / MONO is used. Further, since it is not necessary to provide a mechanical configuration, the configuration can be simplified accordingly. This can contribute to downsizing of the device and the like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a vehicle-mounted VCR according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state of a rear surface of the in-vehicle VCR of FIG. 1;

3A and 3B are diagrams showing a connection state with an AV cable on the rear surface of FIG. 2; FIG. 3A is a diagram showing a connection state between a video / audio input terminal and a video camera; FIG. FIG. 3 is a diagram illustrating a connection state between an output terminal and a television monitor.

FIG. 4 shows a video / audio input terminal and a video / audio input terminal shown in FIG. 2;
FIG. 3 is a partially enlarged view showing a state of an audio output terminal.

5A and 5B are diagrams showing a mechanism inside a video main unit of the in-vehicle VCR in FIG. 1, wherein FIG. 5A is a diagram showing a state where stereo sound is input, and FIG. 5B is a diagram showing a state where monaural sound is input. FIG.

FIG. 6 is a diagram showing a state in which a recording prevention program and a recording prevention processing unit are stored in a ROM in the in-vehicle VCR in FIG. 1 to control the operation of a recording function.

FIG. 7 is a diagram showing a state of control specifications of a program used in the in-vehicle VCR of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... In-vehicle VCR (AV equipment) 11 ... Video main body 15 ... Rear 17 ... Video / audio input terminal 18 ... Video / audio output terminal 19 ... AV cable (connection means) 21 ... Audio connection terminal (audio input terminal and audio) Output terminal) 22 Left connection terminal (Lch) 22a Left connection terminal for input 22b Left connection terminal for output 23 Right connection terminal (Rch) 23a Right connection terminal for input 23b Right connection for output Terminal 24: Audio processing system mechanism (audio processing means) 25 ... Signal switching device (signal switching means) 26 ... Audio signal processing unit 27 ... ROM (storage means) 28 ... Program 29 ... MPU 32 ... Recording prevention program 33 ... Recording prevention Processing unit 34 Recording function 40 Signal detection means 43 IC

Claims (9)

[Claims] 1. An AV apparatus having an audio input terminal comprising a left connection terminal for a left audio and a right connection terminal for a right audio to which a stereo audio signal from the outside can be input, wherein a monaural audio signal is connected to the left connection terminal. When the signal is input to either the terminal or the right connection terminal, the internal signal path is switched by software to output the input monaural audio signal from both the left and right connection terminals for output. An AV device characterized in that it can be configured. 2. An AV device having an audio input terminal comprising a left connection terminal for left audio and a right connection terminal for right audio to which a stereo audio signal from the outside can be input, wherein a stereo audio signal or a monaural audio signal is provided. Audio signal discriminating means for discriminating the type of the audio signal by a discriminating process when any one of the signals is input to one or both of the left connection terminal and the right connection terminal; Signal switching means for selectively switching the output therefrom to either a stereo sound output or a monaural sound output, and a sound processing means for processing a sound signal output from the signal switching means. AV equipment characterized by the above-mentioned. 3. A monaural signal for outputting a left and right audio signal from a monaural audio signal when a monaural audio signal is input to one of the input connection terminals. 3. The AV device according to claim 2, wherein the audio device is controlled to output audio. 4. The audio signal discriminating means includes a storage means for storing a discriminating processing procedure for discriminating between a stereo sound signal and a monaural sound signal. AV equipment. 5. The AV according to claim 1, wherein the output monaural audio signal is a monaural audio signal input from the left connection terminal.
machine. 6. The AV apparatus according to claim 1, wherein the audio signal input from said audio input terminal can be switched and selected by a recording prevention means. machine. 7. A sound input method for an AV device capable of distributing a stereo sound input or a monaural sound input to a plurality of output sides and outputting the same, wherein when monaural sound is input, a plurality of input monaural sounds are input. A method for inputting audio of an AV device, characterized by comprising a setting step of determining whether or not to make settings for simultaneous output to the output side. 8. An audio input method for an AV device capable of distributing a stereo audio input or a monaural audio input to a plurality of output sides and outputting the same, comprising: an external audio signal inputting step of inputting an external audio signal; A signal detection step of detecting a voice signal when a voice signal is input in the external voice input step; a voice signal determination step of determining a type of the voice signal detected in the signal detection step; A signal switching step of selecting and controlling an output from the signal switching section to either a stereo sound output or a monaural sound output based on a result of the discrimination in the signal discriminating step; and a sound for processing a sound signal output from the signal switching means. A voice input method for AV equipment, comprising: a processing step. 9. The signal switching step, wherein when a monaural audio signal is input, all of the plurality of outputs are controlled to a monaural audio output as the input monaural audio signal. AV described in 8
The audio input method of the device.