JPH07182778A - Volume adjusting device - Google Patents

Abstract

PURPOSE:To automatically adjust volume to a value preferred by an user by calculating an adjustment value based on data and forming a voice signal adjusted by this adjustment value, when a voice signal is inputted. CONSTITUTION:A microprocessor 5 controls an input changeover switch 2 and a master volume 4 respectively by sending an input selecting signal to the input changeover switch and a volume control signal to the master volume 4 respectively, by a command from an operational section 8 by an user. Also, the microprocessor 5 has a function in which a variation quantity adjusting signal is sent to a volume adjusting device 3 and a storage section calling signal is sent to a memory 6 and stored contents of the memory 6 is read out. Therefore, a learning effect based on volume adjusting data performed in the past can be found.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a function of adjusting a volume difference between inputs of a plurality of channels when a volume of an audio signal of an audio device or a video device is adjusted, and an accumulated desired volume. The present invention relates to a volume control device having a function.

[0002]

2. Description of the Related Art Audio equipment and video equipment in the prior art have a volume control device for adjusting the level of sound output from a speaker.

In audio equipment, an audio signal reproduced by a magnetic head from a music source such as a disk or tape, and in video equipment,
The volume of the TV reception signal, the video signal reproduced from the video tape by the magnetic head, and the audio signal reproduced and separated by the LD, the CD, etc. are adjusted by the volume adjusting device, and then as a music or a sound field by the speaker. Is output.

In general, a volume control device for video equipment and audio equipment has a function of storing a voice level of a voice signal or a sound field reproduction mode. That is, even if the power of the device is turned off once, the audio level of the speaker output or the sound field reproduction mode when the power is turned on again is kept the same as that before the power was turned off.

Recently, audio equipment or video equipment having a plurality of audio signal inputs and one common speaker has become widespread. In such a device, one of a plurality of audio signal inputs is selected, its volume is adjusted, and then output from the speaker.

In such a device, the user sets in advance the respective volume differences between the plurality of audio signal inputs, and when any one of the audio signal inputs is selected,
There is a volume adjusting device that automatically determines the volume of the audio signal input that has been selected by changing the volume of the previously selected audio signal input by the volume difference. .

[0007]

However, in general,
In audio equipment and video equipment having multiple audio signal inputs, even if the last used time condition can be stored, the last stored conditions, the current time, the program being watched, etc. There is a problem that it is significantly different from the various conditions.

For example, in an audio device for inputting a voice signal from a plurality of input devices having different output voice levels, when the user selects one voice signal input, or when a plurality of channels having different voice modulation degrees are used. When selecting one channel of a television or radio that the user has, it is necessary for the user to adjust the audio level each time selection or tuning is performed.

Therefore, in the above-mentioned conventional volume control device having only the function of holding the audio level at the previous set value, when there are a plurality of audio signal inputs, the user selects the previously selected audio signal input. Each time a different audio signal input is selected, it is necessary to adjust the audio level to a desired value, which is very troublesome.

Further, the volume adjusting device reproduces a sound field for music with respect to an audio signal input from a device reproducing a music source, and reproduces a sound field for music with respect to an audio signal input from a device reproducing a movie. Since the user has to reproduce the sound field of, the user must perform the operation of switching the sound field reproduction mode at the same time when switching from the former audio signal input to the latter audio signal input or vice versa. Met.

Further, by setting and setting respective volume differences between a plurality of audio signal inputs (or channels) in advance, the volume is automatically changed when the channel is selected or selected. In the volume control device, setting the volume difference between each audio signal input requires an adjustment work that requires a professional judgment about the audio signal input or the characteristics of the channel, which is very difficult for general users. There was a problem that it was difficult.

Therefore, a volume control device having a simple structure is provided in which the user automatically adjusts the audio level of the selected audio signal, the selected channel, or the sound field reproduction mode to a value desired by the user. There are issues that must be resolved in order to be realized.

[0013]

In order to solve the above-mentioned problems, a volume adjusting device according to the present invention calculates an input means for inputting an audio signal and an amount of change when the audio signal is adjusted to an appropriate volume. Adjusting means, a control means having a memory for recording data in which the amount of change calculated in the past is recorded, and a reproducing means for outputting the audio signal, and based on the data when the audio signal is input. That is, the adjustment value is calculated, an audio signal adjusted by the adjustment value is formed, and the change amount when the volume of the input audio signal is adjusted is calculated and recorded in the memory in addition to the data. .

Further, a plurality of input means are provided so that different audio signals can be input respectively, and each recording area for individually recording the data of each input means is provided in the memory.
The input means has a channel selection function, and each recording area for individually recording the data of each selected channel is provided in the memory; the memory has a recording area for recording the sound field reproduction data. With the provision, the frequency of sound field reproduction data selected in the past for the audio signal input or the selected channel is recorded; the control means selects the specific audio signal input or the specific channel. The sound field reproduction data is extracted and reproduced based on the selection frequency corresponding to the selected channel when the channel is selected; the control means extracts the data with the highest frequency selection of the sound field reproduction data. This is a volume control device.

[0015]

The volume adjusting device according to the present invention having the above-mentioned structure is
It has the following effects. (1) When the sound signal input from the input means is appropriately adjusted to the volume, the sound signal is adjusted based on the accumulated data of the amount of change adjusted in the past, so that the sound volume adjustment performed in the past can be performed. Based on the learning effect of adjusting the audio signal input based on it, as the number of times the audio signal is adjusted increases, the correction between the input devices can be adjusted to an appropriate volume, and the volume automatically adjusted to the user's preference. Will be adjusted to.

(2) A plurality of input means are provided so that different audio signals can be input, and each recording area for individually recording the data of each input means is provided in the memory, or the input means has a tuning function. In addition, by providing the memory with recording areas according to the number of selected channels, the volume of each audio signal input is automatically set to the volume desired by the user regardless of the volume of other audio signal inputs. In particular, in a device having a large number of audio signal inputs, it is not necessary to set the volume difference existing between the audio signal inputs in advance, which is a difficult task.

(3) The memory is provided with a recording area for recording the sound field reproducing data, and the selection frequency of the sound field reproducing data selected in the past for each of a plurality of audio signal inputs or selected channels is stored. By doing so, and when the control means selects the sound field reproduction data with the highest selection frequency when the audio signal is input or selected, the sound field reproduction mode that the user likes is selected. It will be possible to automatically select and output.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a volume adjusting device according to the present invention will be described in detail below with reference to the drawings. First of the present invention
The volume adjusting device 1 according to the embodiment of the present invention, as shown in FIG.
An input system 1A as an input means, an input selector switch 2,
It is composed of a volume adjusting volume 3, a master volume 4 as an adjusting means, a microprocessor 5 as a controlling means, a memory 6, a reproducing system 7 as a reproducing means, and an operating system 8.

The input system 1A has a plurality of input terminals A, B and C.
.. and each input terminal is an audio output signal terminal of audio equipment or video equipment such as laser disc player, compact disc player, analog record player, mini disc, cassette deck, VCR, TV, radio It is supposed to be connected.

The input changeover switch 2 is controlled by an input selection signal from the microprocessor 5 and is controlled by the input system 1A.
, And has a function of selecting one of the input terminals A, B, C ...

The volume adjusting volume 3 is composed of a voltage control type electronic volume and is controlled by a change amount adjusting signal supplied from the microprocessor 5 to control the volume of the audio signal selected by the input changeover switch 2. Has the function of adjusting.

The master volume 4 is a volume adjusting volume.
It is connected to the output terminal of the volume 3 and has a function of controlling the volume of the output signal from the volume adjusting volume 3 by the volume control signal supplied from the microprocessor 5.

The microprocessor 5 receives an input selection signal to the input changeover switch 2 and a volume control signal to the master volume 4 in response to a command from the operation section 8 by a user.
To control each. Further, the microprocessor 5 has a function of sending a change amount adjusting signal to the volume adjusting volume 3 and a storage unit calling signal to the memory 6 to read the stored contents of the memory 6.

The memory 6 has storage units A1, B1, C1, ... Corresponding to a plurality of audio signal inputs, and the storage contents of each storage unit are read by a storage unit calling signal from the microprocessor 5. It is sent out and updated by the write data from the microprocessor 5.

The reproduction system 7 is composed of an amplifier 7a and a speaker 7b, and reproduces sound from the output signal of the master volume 4.

The operation system 8 is operated by the user and has a function of inputting a request such as input selection and volume adjustment of the user to the microprocessor 5.

The volume adjusting device 1 having such a configuration
Is controlled by the microprocessor 5 executing a program as shown in FIG. 2 and operates as follows.

That is, all the storage units A1 and B of the memory 6
The contents of 1, C1, ... Are initially set to an initial value Δo (for example, 0) (step ST1) and are accumulated and updated each time the user adjusts the volume.
The contents of 1, B1, C1, ... Change to Δ1, Δ2, ... Δn generally represents the contents of the storage unit after being updated n times.

As will be described later, the contents Δn of the storage units A1, B1, C1, ...
It is the total sum Σδi (i = 1 to n) of the volume change amount during the past n volume adjustments performed by.

Now, the content of the storage unit A1 of the memory 6 is Δn.
If the user operates the operation unit 8 to select the audio signal input terminal A, for example (step ST
2), the microprocessor 5 sends an input selection signal for selecting the audio signal input terminal A to the input changeover switch 2, and at the same time, the contents of the storage unit A1, that is, the changes accumulated and calculated when the selection is made in the past. Data Δn, which is the sum of the quantities
The storage unit calling signal for reading out is sent to the memory 6.

Then, the input changeover switch 2 selects the audio signal input terminal A designated by the input selection signal from the plurality of audio signal inputs and sets it to the volume adjusting volume.
Output to system 3. At the same time, the change amount Δn, which is the content of the storage unit A1 corresponding to the audio signal input terminal A, is read by the microprocessor 5 (step ST3).

Next, the microprocessor 5 has a storage unit A.
The required adjustment value Δadj of the volume adjustment volume 3 is calculated by multiplying the data Δn read from 1 by a predetermined weighting W (step ST4). Adjustment value Δadj = Δn × W

Here, the weighting W is, for example, Δn which is the total sum of the amounts of change accumulated when the adjustment is performed 100 times.
= 99, multiplying the weighting W = 0.1 yields an adjustment value Δadj = 9.9 (about “10”), and a change amount buffered with respect to the actual change amount is obtained. Therefore, even if a large amount of change is accumulated during adjustment of 100 times, which is different from the amount of change that is normally adjusted, the effect is extremely small, and if the user adjusts the volume. As a result, the most preferred volume can be automatically adjusted and output.

Then, the microprocessor 5 sends a change amount adjustment signal representing the calculated adjustment value Δadj to the volume adjusting volume 3. The volume adjusting volume 3 changes the volume of the audio signal A2 by the adjustment value Δadj (step ST5).

The audio signal input A2 whose volume is adjusted by the volume adjusting volume 3 is sent to the master volume 4.
If necessary, the volume is adjusted by the user.

The output signal of the master volume 4 is sent to the reproduction system 7, where it is amplified by the amplifier 7a and then output as sound from the speaker 7b.

Therefore, when the sound from the speaker 7b is the volume desired by the user, the user does not operate anything, and accordingly, the processing of the microprocessor 5 is performed in step S.
Return to T2 and wait until another audio signal input is selected.

However, when the sound from the speaker 7b is not the volume desired by the user (step ST
6) The user inputs a command to that effect to the microprocessor 5. In response to this command, the microprocessor 5 sends a volume control signal to the master volume 4.

The master volume 4 changes the volume of the voice signal input A2 in accordance with the volume control signal, that is, the variation amount δ when the voice signal is adjusted to a proper volume (step ST7).

At this time, the microprocessor 5 adds the change amount δ of the volume by the master volume 4 to the contents of the storage unit, that is, the data Δn which is the sum of the change amounts accumulated in the past, and adds new data (Δn + 1 ) Is calculated (step ST8). Δn + 1 = Δn + δ

The microprocessor 5 writes new data (Δn + 1) in the storage unit A1 of the memory 6 and updates the contents (step S9).

After steps ST6 to ST9 are repeated until the user is satisfied with the volume, the volume adjustment for the audio signal input terminal A is completed. At that time, the content of the storage unit A1 of the memory 6 is the sum Σδi (i = 1 to 1) of the amount of change in m volume adjustments performed after the volume adjustment with the adjustment value Δadj.
m). However, δi is the volume change amount at the time of the i-th adjustment.

Various applications are possible by modifying the configuration of the input system 1 for inputting a plurality of audio signals with the basic configuration of the first embodiment. First to third shown below
The embodiment is a modification thereof.

The volume adjusting device 9 according to the second embodiment of the present invention is based on the sum of the accumulated change amounts of the volume in the audio / video equipment having a channel selection circuit such as a video deck, a television, a radio and a tuner. It is a device that controls based on the following data.

That is, as shown in FIG. 3, the volume adjusting device 9 includes a receiving section 9A which is an input means, a tuning circuit 10, a memory 11, a volume adjusting volume 3, a master volume 4 and a control means. A microprocessor 5, which is a reproducing means, a reproducing system 7 which is a reproducing means, and an operating system 8. The audio equipment and the video having a function of selecting from a plurality of channels such as a VCR, a television, and a radio. Applies to equipment. The same parts as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted.

The receiver 9A is provided with an antenna, the output side of which is connected to the tuning circuit 10 and has a function of receiving radio waves of TV and radio. Tuning circuit 10
Selects the reception signal of the channel designated by the tuning control signal from the microprocessor 5 from the reception signals received by the receiving unit 9, and amplifies and demodulates it. T
In the case of V, video / audio separation is performed, and an audio signal is output to the volume adjusting volume 3.

The memory 11 is composed of recording sections A3, B3, C3, ... For the respective channels a, b, c, d, ... Corresponding to the selected channels.
Each of 3, B3, C3, ... Stores data Δn which is the sum total of the volume changes accumulated in the past volume adjustment. Then, reading and writing are performed via the data line by the storage unit calling signal from the microprocessor 5.

The tuning circuit 10 amplifies and demodulates the received signal of the channel designated by the tuning control signal, and sends the audio signal to the volume adjusting volume 3. The data sent to the volume control volume 3 is sent to the master volume 4,
Here, if necessary, the sound volume is adjusted by the user, and then the sound is sent to the reproduction system 7, converted into a sound and outputted.

In the volume adjusting apparatus according to the second embodiment having such a configuration, the receiving section 9A receives the audio signal transmitted from each broadcasting station wirelessly or by wire, and the tuning circuit 10 detects the user's voice signal. The desired channel is selected. Then, when the user operates the operation unit 8, a tuning control signal is transmitted from the microprocessor 5 to the tuning circuit 10, and at the same time, recording for channels a, b, c, d, ... Of the memory 11 is performed. Part A
3, B3, C3, D3, ... Are specified, the past volume change amount is read by the microprocessor 5, and the same processing as in the first embodiment described above is performed.

Next, a volume control apparatus according to a third embodiment of the present invention is provided with a plurality of input terminals A, B, C, ... (FIG. 1) which constitute the input system 1A of the first embodiment. When an audio / video device equipped with a tuning circuit is connected to (see), that is, the input of the audio signal from the tuning circuit corresponds to the data Δn which is the sum of the accumulated changes in volume. It is configured so that the volume can be adjusted.

That is, the volume adjusting device 1 according to the third embodiment.
As shown in FIG. 4, reference numeral 2 denotes an input system 21A which is an input means including an audio device 12A and a video device 19 each having a channel selection function, an input changeover switch 2, a volume adjusting volume 3, and a master volume. The memory 4 includes a playback system 7, a playback system 7 as a playback means, an operation system 8, a microprocessor 22 as a control means, and a memory 23.
The same parts as those described in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

The audio device 12A is a device equipped with a channel selection function, and is composed of a receiver 16, a channel selection circuit 17, and a microprocessor 18.

The receiving section 16 receives radio waves and is connected to the tuning circuit 17. The tuning circuit 17
Among the radio waves received by the receiving unit 16, it selects a specific channel, and its output side is connected to the input terminal A,
Its control terminal is connected to the microprocessor 18.

The microprocessor 18 transmits the code of the selected channel to the microprocessor 14, and is connected to the microprocessor 14 via the channel code line.

The video device 19 is a device having a tuning function and is composed of a receiving section 19A, a tuning circuit 20, and a microprocessor 21. The output side of the receiver 19A is connected to the channel selection circuit 20. Tuning circuit 20
The output side of is connected to the input terminal B, and its control terminal is connected to the output side of the microprocessor 21. The microprocessor 21 is connected to the microprocessor 14 via a channel code line.

The video device 19 thus constructed is
From the reception signal received by the reception unit 19A, a specific channel is selected by the tuning circuit 20 under the control of the microprocessor 21, and the audio signal of that channel is input via the audio signal input terminal B of the volume adjusting device 12. Input to the input selector switch 2. At the same time, the microprocessor 21
Selects the channel code selected by the microprocessor 14
Send to.

Also, the audio signal input terminals C, D, ...
It is designed to be input into.

The memory 23 is used for the audio device 12
An audio signal input terminal A from A, an audio signal input terminal B from the video device 19, and other audio signal input terminals C,
Storage units A, B, C, D corresponding to D ...
···have.

For example, the storage units A and B corresponding to the audio device 12A and the video device 19 having the channel selection function are
Each is divided into storage areas corresponding to the respective channels A, B, C, ... Then, in each storage area, each channel A, B,
Data .DELTA.n, which is the sum total of the change amounts of the sound volume at the time of adjusting the sound volume in the past regarding the sound signal input of C, ... Is stored.

In the operation of the volume adjusting device shown in FIG.
For example, when the audio signal input terminal A from the audio device 12A is selected, the selected channel code is notified from the microprocessor 18 of the audio device 12A to the microprocessor 14, and the microprocessor 14 stores a memory corresponding to this channel code. The data Δn, which is the sum of the amount of change in the area (for example, channel A), is called to perform the same volume adjustment as in the first embodiment.

Next, in the first, second and third embodiments, the volume adjusting volume 3 is a voltage control type electronic volume, but the volume is increased or decreased by an electronic volume of serial data control. Volume controlled only by data
When using the volume control, at the same time as selecting the audio signal input or selecting the channel, the volume adjustment volume 3
After returning to neutral (center), the data Δn, which is the sum of the amounts of change stored in the memory 6, the memory 11 or the memory 23, is read out, weighted W and adjusted value Δn.
It is sufficient to calculate adj.

Although the master volume 4 used in each of the above embodiments is controlled by the microprocessor 5 or the microprocessor 14, the microprocessor 5 or the microprocessor 1 is used.
It may be a volume that operates only under the control of another controller which is controlled by 4.

The master volume 4 may be a volume controlled by another controller which is not controlled by the microprocessor 5 or the microprocessor 14, or may be a manual volume. In this case, it is necessary to transmit to the microprocessor 5 or 14 the change amount δ of the sound volume manually or by another controller.

As described above, the master volume 4 capable of transmitting the change amount δ to the microprocessor 5 or 14 is, as shown in FIGS. 5 and 6, a disc-shaped pulse plate 24 and the pulse plate 24. Rotating shaft 2 provided on the central axis of 24
It is composed of 5 and.

On the outside of one surface of the pulse plate 24, radial conductive convex portions 26 are provided at equal intervals along the circumference. These convex portions 26 are connected to the input terminals of the microprocessors 5 and 14.

On the rotary shaft 25, each convex portion 2 of the pulse plate 24 is
The contact 27 is attached so as to come into contact with the contact 6, and the contact 27 is grounded. When the rotating shaft 25 of the master volume 4 having such a configuration rotates, the contact 27
Also rotates together and comes into contact with the convex portion 26 in sequence. Then, each time the protrusion 26 contacts the contact 27, the inputs of the microprocessors 5 and 14 are grounded.

In other words, the number of projections 26 in proportion to the rotation angle of the rotary shaft 25 sequentially contact the contacts 27, and the input terminals of the microprocessors 5 and 14 are grounded each time. Therefore, the rotation angle can be known by counting the number of times of ground contact in the microprocessors 5 and 14.

That is, if the relationship between the rotation angle of the rotating shaft 25 and the change in the volume is stored in the microprocessors 5 and 14 in advance, the microprocessors 5 and 14 can calculate the change amount δ of the volume based on the rotation angle. You can

Next, the volume adjusting device 28 according to the fourth embodiment of the present invention automatically switches the sound field reproducing mode. That is, as shown in FIG. 7, the volume adjusting device 28 includes the input system 1 which is the input means and the input changeover switch 2.
And a sound field reproduction processing unit 28A and a memory 29.

The input side of the sound field reproduction processing section 28A is connected to the input changeover switch 2 through the line of the audio signal, the output side thereof is connected to the reproduction system 7, and its control terminal is connected to the microprocessor 29. ing. Therefore, the sound field reproduction processing unit 28A inputs the audio signal selected by the input changeover switch 2 and performs the sound field reproduction process by the control signal from the microprocessor 5 to reproduce the sound field.

The memory 29 has storage units A, B, C, D, ... Corresponding to each audio signal input. Each storage unit A, B, C, D, ... Stores the number of selections for each sound field reproduction mode regarding the corresponding audio signal input.

The sound volume adjusting device 28 configured as described above
First, when the user selects an audio signal input, for example, the audio signal input terminal A is selected, a signal of an appropriate device connected to the audio signal input terminal A is reproduced as a sound field from the input selector switch 2 as a sound field. It is input to the processing unit 28A.

At the same time, the microprocessor 5 reads the contents of the storage units A, B, C, D, ... Corresponding to the designated audio signal input terminal A of the memory 29, for example, the contents of the recording unit A, The sound field reproduction mode most often selected in the past for the audio signal input terminal A is found, and a control signal representing the sound field reproduction mode is sent to the sound field reproduction processing unit 28A.

The sound field reproduction processing section 28A reproduces and outputs the sound field in the sound field reproduction mode. In this case, when the user resets the sound field reproduction mode, the microprocessor 5 increments the number of past selections of the sound field reproduction mode stored in the storage unit of the memory 29 by 1, and stores the stored contents. To update.

In this way, the optimum sound field in the sound field reproduction mode is automatically set. The memory 2
Each of the storage units A, B, C, D, ... of 9 may also be used as a storage unit that stores the data Δn that is the total sum of the volume change amounts.

[0076]

As described above, the volume adjusting device according to the present invention has the following effects. (1) When the audio signal is input from the input means, the audio signal is adjusted based on the past accumulated amount of change data, so that it is based on the volume adjustment data performed in the past. It is possible to find a learning effect, and this learning effect has an extremely excellent effect that the more the number of adjustments is increased, the more the sound volume can be adjusted to an appropriate volume desired by the user.

(2) A plurality of input means are provided so that different audio signals can be input, each memory has a recording area for individually recording the data of each input means, and the input means is selected. By having the station function and each recording area for individually recording the data of each selected channel in the memory, one can be selected from different audio signal inputs and the volume of the selected audio signal input can be changed. It becomes possible to automatically adjust to the volume desired by the user regardless of the volume of other audio signal inputs, and in a device having multiple audio signal inputs, each audio signal and each selected channel are selected. This has an extremely excellent effect that the volume can be adjusted to obtain a unique learning effect for each channel.

(3) The memory is provided with a recording area for recording sound field reproduction data, and the frequency of sound field reproduction data selection is stored for each channel for which an audio signal is input or selected. Also, when an audio signal is input or selected, the sound based on the selected frequency is selected or the sound field reproduction data with the highest selected frequency is selected. This has an extremely excellent effect that the field reproduction mode can be automatically and easily obtained and its adjustment can be easily performed.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing an overall configuration of a volume adjusting device according to a first embodiment of the present invention.

FIG. 2 is a flow chart diagram showing processing by the control means.

FIG. 3 is a schematic block diagram showing an overall configuration of a volume adjusting device according to a second embodiment of the present invention.

FIG. 4 is a schematic block diagram showing a configuration of a volume adjusting device according to a third embodiment of the present invention.

FIG. 5 is a schematic plan view showing the structure of a master volume used in the first, second and third embodiments.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a schematic block diagram showing a configuration of a volume adjusting device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Volume Control Device 1A Input System 2 Input Selector Switch 3 Volume Control Volume 4 Master Volume 5, 14 Microprocessor 6, 11, 15, 29 Memory 7 Playback System 8 Operation System 9 Volume Control Device 9A, 16, 19A Reception Part 10, 17, 20 Channel selection circuit 12A Audio device 19 Video device 18, 21 Microprocessor 21A Input system 23 Memory 24 Pulse plate 25 Rotation axis 26 Convex part 27 Contact point 28 Volume adjustment device 28A Sound field reproduction processing part 29 Memory

Claims (6)

[Claims] 1. An input unit for inputting a voice signal, an adjusting unit for calculating a change amount when the voice signal is appropriately adjusted to a sound volume, and a memory for recording data in which the change amount calculated in the past is accumulated. Comprising a control means and a reproducing means for outputting the audio signal, when the audio signal is input, an adjustment value is calculated based on the data, and an audio signal adjusted by the adjustment value is formed, A volume adjusting device, wherein a change amount when the volume of an input audio signal is adjusted is calculated and recorded in the memory in addition to the data. 2. The input means is provided in plural so that different audio signals can be input respectively, and each recording area for individually recording the data of each input means is provided in the memory. Item 1. The volume control device according to item 1. 3. The input means is provided with a channel selection function, and each recording area for individually recording the data for each selected channel is provided in the memory. The volume control device according to 2. 4. The recording area for recording the sound field reproduction data is provided in the memory, and the selection frequency of the sound field reproduction data selected in the past for the audio signal input or the selected channel is recorded. The volume control device according to claim 1, 2 or 3, wherein the volume adjustment device is configured as described above. 5. The control means, when a specific audio signal input or a specific channel is selected, extracts and reproduces sound field reproduction data based on a selection frequency corresponding to the selection. The volume control device according to claim 1, 2, 3, or 4. 6. The volume adjusting apparatus according to claim 5, wherein the control means extracts the one having the highest frequency of selection of the sound field reproduction data.