JP2004112677A - Electronic sound volume control apparatus and remote controller thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic sound volume control apparatus and a remote controller thereof having versatility and capable of ensuring an excellent remote operation. <P>SOLUTION: The correlation between a common volume level Dcom and a unique volume level Dvol1 is stored in a correlation storage unit 132 of a portable radio terminal 13. A present sound volume level storage unit 131 stores the level Dcom. An attenuation rate of an electronic sound volume 37 is controlled on the basis of the level Dcom. In response to the operation of a volume switch 39, a volume level converting unit 133 increases and decreases the level Dcom stored in the unit 131 on the basis of the correlation registered in the unit 132. A volume level updating unit 134 updates the level Dcom after being increased or decreased, and records it in the unit 131. A volume level notifying unit 135 notifies a terminal 14 about the level Dcom after increased or decreased. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic volume control device remotely controlled by a remote controller and a remote control thereof, and more particularly to an electronic volume control device remotely controlled based on a volume control signal defined in a Bluetooth standard specification, and an electronic volume control device thereof. Regarding remote controller.
[0002]
[Prior art]
A technique for remotely controlling an electronic volume mounted on a sound reproducer by operating a volume adjustment key provided on a remote controller (hereinafter, referred to as a remote controller) is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-308230. Have been. The remote controller is provided with a "+ (plus)" key and a "-(minus)" key as volume control keys, and may be further provided with a "MUTE" key for attenuating the volume to a minimum level at a stretch.
[0003]
On the other hand, in Bluetooth, which is a global communication standard, the volume of a sound player mounted on the head, that is, a headset, can be controlled remotely from a sound source (AudioGateway) of a mobile phone or the like wirelessly connected to the head. Standards for operation are set. In this standard, 16 levels from "0" to "15" are prepared as the number of steps for volume control.
[0004]
Here, for example, in the volume control between the television and the remote control, the absolute volume value is not instructed from the remote control to the television, but the volume is increased by one level or reduced by one level. Thus, a signal that relatively changes the current volume is output. On the other hand, the playback device and the remote controller (sound source) compliant with the Bluetooth standard recognize each other by notifying each other of the 16-step volume values, and recognize the current volume value. When the "+" button on the remote control is pressed at "", a volume value "9" is instructed from the remote control to the player. Further, when the volume value is changed from “9” to “10” on the reproducing device side, the information is also notified to the remote controller. Therefore, if the "+" button is pressed next on the remote controller, the volume value "11" is instructed from the remote controller to the player.
[0005]
[Problems to be solved by the invention]
When remotely controlling the electronic volume of the headset provided on the helmet with the vehicle body side remote control or mobile terminal, the electronic volume of the headset can be simplified by reducing the number of volume adjustment steps, considering operation while wearing gloves Is desirable. For example, it is desirable to narrow down to about four levels such as “mute”, “small volume for stopping”, “medium volume for low / middle speed”, and “high volume for high speed”. However, when the number of sound volume adjustment steps of the playback device is reduced, the following problems may newly occur.
[0006]
In FIG. 11, if the number of volume control steps of the remote controller is reduced to four in accordance with the number of volume control steps “4” of the playback device A, the playback device B having the number of volume control steps of “10” is used with this remote control. The signal corresponding to the volume values “5” to “10” cannot be output even by remote control, so that the volume of the playback device B cannot be sufficiently increased.
[0007]
On the other hand, in order to cope with such a technical problem, as shown in FIG. 12, when the sound volume values are discontinuously assigned to the respective sound volume adjustment steps “1” to “4” on the remote controller side, the playback device A It is sufficient that the volume value is similarly assigned to each volume adjustment stage as shown in the following example. However, if the number of volume adjustment stages is "10" as in the case of the playback device B, there is a volume value that cannot be set with the remote control. Resulting in. In addition, if the sound volume adjustment steps do not match, as in the case of the playback device C, remote control using a remote controller becomes impossible.
[0008]
Further, as shown in FIG. 13, when the number of sound volume control steps on the remote control side is “16”, in the reproducing device A having the number of sound volume control steps of “4”, the range of “1” to “4” from the remote control side As long as the sound volume value is indicated by, the electronic volume can be controlled to the indicated sound volume value. However, if the "+" key is kept depressed beyond the volume value "4" and the volume value rises to "8", for example, the "-" key on the remote control is depressed to lower the volume. Also, each time, "7", "6", and "5" are notified as the volume value. During this time, since the volume value does not decrease, the volume does not decrease even though the "-" key is pressed. Inconvenience occurs.
[0009]
Also, as in the case of the playback device B, if the volume value is discontinuously assigned even if the volume adjustment step number is “4”, for example, after the volume value “5” is notified from the remote controller, “+” Even if the key is kept depressed, there is a disadvantage that the volume does not increase until the volume value reaches “10”. Such inconvenience similarly occurs even when the number of sound volume adjustment stages is increased as in the case of the reproducing device C.
[0010]
As described above, there is a technical problem that if the number of sound volume adjustment steps of the playback device is reduced below "16" which is the Bluetooth standard specification, the operability of the remote controller is impaired.
[0011]
In addition, such a technical problem can be solved by separately preparing a dedicated remote controller that is adapted to the number of steps of volume control of the playback device, but the versatility of the device is impaired, and the combination with other devices is hindered. It does not fit the concept of Bluetooth, which emphasizes versatility.
[0012]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the related art, and to provide an electronic volume control device and a remote controller for the same, which can ensure good remote controllability.
[0013]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention is characterized in that the following means are taken in an electronic volume control device remotely controlled by a remote controller and the remote controller.
[0014]
(1) The electronic volume control device of the present invention provides the i-th common volume value Dcom [i] (i = 1 to N) on the N-stage common scale and the j-th unique volume value Dvol1 [on the M-stage unique scale. j] (j = 1 to M), means for receiving a common volume value Dcom from a remote controller, means for storing the common volume value Dcom, and based on the common volume value Dcom. An electronic volume whose attenuation rate is controlled by the controller, a volume switch for specifying a specific volume value Dvol1 on the specific scale, and converting the specified specific volume value Dvol1 to a common volume value Dcom based on the correspondence relationship. And updating the common volume value Dcom after the conversion in the storage unit.
[0015]
(2) The remote controller of the present invention provides the i-th common volume value Dcom [i] (i = 1 to N) on the N-stage common scale and the k-th unique volume value Dvol2 [k] on the L-stage unique scale. (K = 1 to L), means for storing the current common volume value Dcom, a volume switch for specifying the specific volume value Dvol2 on the specific scale, and Means for converting the sound volume value Dvol2 to a common sound volume value Dcom based on the correspondence, means for updating and registering the converted common sound volume value Dcom in the storage means, and electronically converting the converted common sound volume value Dcom to the storage means. Means for transmitting to the volume control device.
[0016]
According to the above feature (1), the attenuation rate of the electronic volume is instructed from the remote controller by the volume value Dcom on the common scale. In the electronic volume control device, the attenuation rate of the electronic volume is instructed by the volume value Dvol1 on the eigenscale. This eigenvolume value Dvol1 is converted into the common volume value Dcom, and the attenuation rate of the electronic volume is set to the common volume value Dcom. It is controlled based on. Therefore, the electronic volume control device can employ a unique scale for volume control while securing versatility of the device itself and the remote controller.
[0017]
According to the above feature (2), in the remote controller, the attenuation rate of the electronic volume can be indicated by the volume value Dvol2 on the specific scale. After the specific volume value Dvol1 is converted to the common volume value Dcom, the electronic volume Sent to the control device. Since the electronic volume control device controls the attenuation rate of the electronic volume based on the common volume value Dcom, the remote controller employs a unique scale for volume control while securing the versatility of its own device and the electronic volume control device. it can.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an example of a communication mode using an intercom to which the present invention is applied, and an in-vehicle wireless terminal 14 as a remote controller of the present invention is mounted on a vehicle A. Helmets 1a, 1b, 1c worn by the occupants of the vehicles A, B are equipped with a microphone 11, a speaker 12, and a headset including a portable wireless terminal 13 as an electronic volume control device of the present invention.
[0019]
The in-vehicle wireless terminal 14 and each portable wireless terminal 13 conform to the Bluetooth standard, and the in-vehicle wireless terminal 14 operates in a master mode and the other portable wireless terminals 13 operate in a slave mode on a piconet that accommodates them. Perform wireless communication with each other.
[0020]
FIG. 2 is a block diagram showing a configuration of a main part of the portable wireless terminal 13 as the electronic volume control device of the present invention. Here, a description of a configuration unnecessary for the description of the present invention is omitted.
[0021]
The antenna AT is connected to a Bluetooth (BT) module. The CPU 33 executes various processes according to a program stored in the ROM 34. The RAM 35 provides a work area for temporarily storing data and the like when the CPU 33 executes various processes. Various operation switches including a volume switch 39 and a display device are connected to the interface 36. Volume switch 39 includes at least a "+" key 39a and a "-" key 39b. The electronic volume 37 attenuates the input signal at an attenuation rate according to the operation of the volume switch 39, and outputs this to the amplifier 38.
[0022]
The BT module has an RF unit 31 and a BT chip 32 as main components. The BT chip 32 executes processing for establishing intra-piconet synchronization with the partner terminal, encoding / decoding of transmission / reception signals, and the like. That is, each BT module digitally modulates a carrier signal with transmission data at the time of transmission, and spreads the modulated carrier signal by frequency hopping. Then, after amplifying the transmission signal to a transmission output level equal to or less than a specified value, the signal is transmitted from the antenna AT to the wireless terminal of the communication partner. In addition, a radio signal arriving from a radio terminal of a communication partner is received via an antenna AT, and is subjected to spectrum despreading and digital demodulation.
[0023]
FIG. 3 is a block diagram showing a configuration of a main part of the on-vehicle wireless terminal 14 as a remote controller of the present invention. Compared with the portable wireless terminal 13, the speaker 12, the electronic volume 37 and the amplifier 38 are omitted. I have.
[0024]
FIG. 4A is a functional block diagram of the portable wireless terminal 13, and FIG. 4B is a functional block diagram of the in-vehicle wireless terminal 14, and the same reference numerals as those described above denote the same or equivalent parts.
[0025]
In FIG. 4A, the correspondence storage unit 132 of the portable wireless terminal 13 is a function of the ROM 34, in which the correspondence between the common volume value Dcom and the specific volume value Dvol1 is stored in advance. The common volume value Dcom is a volume value defined on a 16-level volume scale that is a Bluetooth standard, and can take any one of 16 levels from Dcom [0] to Dcom [15]. The unique volume value Dvol1 is a volume value defined on a volume scale unique to the portable wireless terminal 13, and can take any one of M levels of Dvol1 [1] to Dvol1 [m]. In the present embodiment, since the portable wireless terminal 13 employs a four-stage unique scale, the volume value can take any one of four stages Dvol1 [1] to Dvol1 [4].
[0026]
The current volume value storage unit 131 is a function of the RAM 35, and includes a common volume value Dcom notified by wireless communication from the vehicle-mounted wireless terminal 14 or a common volume value Dcom set by a volume operation of the terminal 13. Is stored. The attenuation rate of the electronic volume 37 is controlled based on the common volume value Dcom.
[0027]
The volume value conversion unit 133 is a function of the CPU 33 and responds to a volume operation of the volume switch 39 to store the common volume value Dcom stored in the current volume value storage unit 131 in the correspondence storage unit 132. Increase or decrease based on the registered correspondence. The volume value update unit 134 updates and registers the increased / decreased common volume value Dcom in the current volume value storage unit 131. The volume value notification unit 135 notifies the in-vehicle wireless terminal 14 of the increased / decreased common volume value Dcom.
[0028]
In FIG. 4B, the correspondence storage unit 141 of the in-vehicle wireless terminal 14 is a function of the ROM 44, and stores the correspondence between the common volume value Dcom and the specific volume value Dvol2. The common volume value Dcom is a volume value defined on a 16-level volume scale that is a Bluetooth standard, and can take any one of 16 levels from Dcom [0] to Dcom [15]. The specific volume value Dvol2 is a volume value defined on an L-level volume scale specific to the terminal 14, and in the present embodiment, any one of seven levels Dvol2 [1] to Dvol2 [7] can be employed. .
[0029]
The current volume value storage unit 141 is a function of the RAM 45, and stores a common volume value Dcom notified from the portable wireless terminal 13 or a common volume value Dcom set by a volume operation of the terminal 14 itself. You.
[0030]
The volume value conversion unit 143 is a function of the CPU 43, and stores the common volume value Dcom stored in the current volume value storage unit 141 in the correspondence storage unit 142 in response to a volume operation of the volume switch 49. Increase or decrease based on the registered correspondence. The volume value update unit 144 updates and registers the increased / decreased common volume value Dcom in the current volume value storage unit 141. The volume value notification unit 145 notifies the portable radio terminal 13 of the increased / decreased common volume value Dcom.
[0031]
Next, the operation of the present embodiment will be described in detail with reference to the flowcharts of FIGS. FIG. 5 shows the operation of the portable wireless terminal 13, and FIG. 6 shows the operation of the in-vehicle wireless terminal 14.
[0032]
In FIG. 5, the portable wireless terminal 13 reads the current common volume value Dcom from the volume value storage unit 131 and notifies the electronic volume 37 at step S11. In step S12, the attenuation rate of the electronic volume 37 is controlled based on the read common volume value Dcom. Therefore, the reproduction volume output from the speaker 12 of the headset is limited based on the common amount value Dcom. In step S13, the read common volume value Dcom is notified from the volume value notification unit 135 to the vehicle-mounted wireless terminal 14 as an initial value.
[0033]
In FIG. 6, when the in-vehicle wireless terminal 14 receives the common volume value Dcom from the portable wireless terminal 13 in step S31, the in-vehicle wireless terminal 14 newly registers the common volume value Dcom in the current volume value storage unit 141 in step S32. In step S33, it is determined whether or not the volume switch 49 of the own terminal 14 has been operated, and if the volume operation has not been detected, the process proceeds to step S34. In step S34, it is determined whether or not the common volume value Dcom transmitted from the portable wireless terminal 13 has been received. If not, the process returns to step S33.
[0034]
Returning to FIG. 5, the portable wireless terminal 13 also notifies the initial value of the common volume value Dcom in step S13, and then determines in step S14 whether or not the volume switch 39 of the terminal itself has been operated. When a volume operation is detected, in step S17, the common volume value Dcom registered in the current volume value storage unit 131 is changed by the volume value conversion unit 133 in response to the volume operation to the correspondence storage unit 132. Is executed with reference to the "volume value increase / decrease process".
[0035]
FIG. 7 is a flowchart showing the operation of one embodiment of the "volume value increasing / decreasing process". Here, as described in detail with reference to FIGS. 8, 9, and 10, the current common volume value Dcom is [9]. The operation will be described by taking as an example a case where the volume switch 39 is increased (FIG. 8) and a case where the volume switch 39 is decreased (FIG. 9).
[0036]
As shown in FIGS. 8, 9, and 10, in the present embodiment, the four unique sound volume values Dvol1 [1] to Dvol1 [4] of the portable wireless terminal 13 are respectively referred to as “small sound volume suitable for stopping” and “low sound volume”. Defined as "small volume suitable for traveling at vehicle speed", "medium volume suitable for traveling at medium vehicle speed", and "maximum volume suitable for traveling at high vehicle speed", respectively, are common volume values Dcom [1], [7], [11]. , [15] are associated with each other. From a similar viewpoint, the seven unique volume values Dvol2 [1] to Dvol2 [7] of the vehicle-mounted wireless terminal 14 include common volume values Dcom [1], [4], [7], [9], [11], respectively. ], [13], and [15] are associated with each other.
[0037]
In FIG. 7, in step S171, the current common volume value Dcom [9] is read from the current volume value storage unit 131. In step S172, it is determined whether the volume operation is an increase operation or a decrease operation.
[0038]
If it is an increase operation, in step S173, as shown in FIG. 8, from the four unique volume values Dvol1 [1] to Dvol1 [4], the corresponding common volume value Dcom ([1], [7]) , [11], [15]) is selected as the specific volume value Dvol1 closest to the current common volume value Dcom [9] on the increasing side. In the present embodiment, the corresponding common volume value Dcom of the specific volume value Dvol1 [1] is [1], the corresponding common volume value Dcom of the specific volume value Dvol1 [2] is [7], and the corresponding specific volume value Dvol1 [3]. The common volume value Dvol is [11], the corresponding common volume value of the unique volume value Dvol1 [4] is [15], and the corresponding common volume value Dvol1 [11] of the unique volume value Dvol1 [3] is the common volume value Dcom [ 9], the specific volume value Dvol1 [3] is selected because it is closest to the increase side. In step S175, the selected unique volume value Dvol1 [3] is converted into a common volume value Dcom [11].
[0039]
On the other hand, if the volume operation is a decrease operation, in step S174, as shown in FIG. 9, from the four unique volume values Dvol1 [1] to Dvol1 [4], the corresponding common volume value Dcom ([ 1], [7], [11], [15]) are selected in the same manner as described above, with the specific volume value Dvol1 [2] closest to the current common volume value Dcom [9] on the decreasing side. In step S175, the selected unique volume value Dvol1 [2] is converted into a common volume value Dcom [7].
[0040]
Returning to FIG. 5, when the increased / decreased common volume value Dcom is obtained as described above, in step S18, the increased / decreased common volume value Dcom is updated and registered in the current volume value storage unit 131 by the volume value updating unit 134. Is done. Thereafter, the process returns to step S12, and the attenuation rate of the electronic volume 37 is controlled based on the common volume value Dcom after the increase and decrease. In step S13, the increased / decreased common volume value Dcom is notified from the volume value notification unit 135 to the in-vehicle wireless terminal 14.
[0041]
When the in-vehicle wireless terminal 14 receives the increased / decreased common volume value Dcom in step S34 of FIG. 6, the common volume value Dcom is updated and registered in the current volume value storage unit 141 by the volume value updating unit 144 in step S35. .
[0042]
On the other hand, when the volume switch 49 of the in-vehicle wireless terminal 14 is operated, and this is detected in step S33 of FIG. 6, in step S36, the “volume value increase / decrease process” similar to that of the portable wireless terminal 13 performs volume value conversion. This is executed in the unit 143.
[0043]
FIG. 10 is a diagram schematically illustrating the operation of the “volume value increasing / decreasing process” in the on-vehicle wireless terminal 14. Here, the volume switch 39 is increased from the state where the current common volume value Dcom is [7]. The operation will be described with an example of the case where the operation is performed.
[0044]
In the present embodiment, among the seven specific volume values Dvol2 [1] to Dvol2 [7], the corresponding common volume value Dcom is the specific volume value Dvol2 closest to the current common volume value Dcom [7] on the increasing side. Is selected. In the present embodiment, the corresponding common volume value Dcom of the specific volume value Dvol2 [1] is [1], the corresponding common volume value Dcom of the specific volume value Dvol2 [2] is [4], and the corresponding specific volume value Dvol2 [3]. The common volume value Dcom is [7], the corresponding common volume value Dcom of the unique volume value Dvol2 [4] is [9], the corresponding common volume value Dcom of the unique volume value Dvol2 [5] is [11], and the unique volume value Dvol2 [ Since the corresponding common volume value Dcom of [6] is [13] and the corresponding common volume value Dcom of the unique volume value Dvol2 [7] is [15], the unique volume value Dvol2 [4] is selected. Then, [9], which is the common volume value Dcom corresponding to the unique volume value Dvol2 [4], is obtained as the increased / decreased common volume value Dcom.
[0045]
In step S37, the increased / decreased common volume value Dcom is updated and registered in the current volume value storage unit 141 by the volume value updating unit 144. In step S38, the common volume value Dcom after the increase or decrease is notified from the volume value notification unit 145 to the portable wireless terminal 13.
[0046]
In the portable wireless terminal 13, when the common volume value Dcom is received in step S15 in FIG. 5, the common volume value Dcom is updated and registered in the current volume value storage unit 131 by the volume value updating unit 134 in step S16. Thereafter, the process returns to step S12, and the attenuation rate of the electronic volume 37 is controlled based on the updated common volume value Dcom.
[0047]
【The invention's effect】
According to the present invention, the following effects are achieved.
[0048]
(1) The attenuation rate of the electronic volume is indicated by the volume value Dcom on the common scale from the remote controller (vehicle-mounted wireless terminal 14). In the electronic volume control device (portable wireless terminal 13), the attenuation rate of the electronic volume is instructed by the volume value Dvol1 on the eigenscale. The eigenvolume value Dvol1 is converted into a common volume value Dcom, and the attenuation rate of the electronic volume is obtained. Is controlled based on the common volume value Dcom. Therefore, the electronic volume control device can employ a unique scale for volume control while securing versatility of the device itself and the remote controller.
[0049]
(2) In the remote controller (vehicle-mounted wireless terminal 14), the attenuation rate of the electronic volume is indicated by the volume value Dvol2 on the inherent scale. After the intrinsic volume value Dvol1 is converted into the common volume value Dcom, the electronic volume is reduced. It is transmitted to the control device (portable wireless terminal 13). Since the electronic volume control device controls the attenuation rate of the electronic volume based on the common volume value Dcom, the remote controller employs a unique scale for volume control while securing the versatility of its own device and the electronic volume control device. it can.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of a communication mode using an intercom to which the present invention is applied.
FIG. 2 is a block diagram showing a configuration of a communication system of a portable wireless terminal to which the present invention has been applied.
FIG. 3 is a block diagram showing a configuration of a communication system of an in-vehicle wireless terminal to which the present invention is applied.
FIG. 4 is a functional block diagram of a portable wireless terminal and an in-vehicle wireless terminal to which the present invention is applied.
FIG. 5 is a flowchart showing a procedure for adjusting the volume of the portable wireless terminal.
FIG. 6 is a flowchart showing a sound volume adjustment procedure of the vehicle-mounted wireless terminal.
FIG. 7 is a diagram (part 1) schematically showing a volume control method of the present invention.
FIG. 8 is a diagram (part 2) schematically showing a volume control method of the present invention; FIG. 9 is a diagram (part 3) schematically showing a volume control method of the present invention; It is the figure (the 4) which showed typically the volume control method of this invention. [FIG. 11] It is a figure for explaining the subject of prior art.
FIG. 12 is a diagram for explaining a problem of the related art.
FIG. 13 is a diagram for explaining a problem of the related art.
[Description of Signs] 11 ... Microphone, 12 ... Speaker, 13 ... Portable wireless terminal, 14 ... In-vehicle wireless terminal, 31 ... RF unit, 32 ... BT chip, 33 ... CPU, 34 ... ROM, 35 ... RAM, 36 ... Output interface 37 37 Electronic volume device 38 38 Amplifier 39 Volume switch

Claims (6)

In an electronic volume control device remotely operated by a remote controller,
Means for managing the correspondence between the i-th common volume value Dcom [i] on the N-stage common scale and the j-th unique volume value Dvol1 [j] on the M-stage unique scale;
Means for receiving a common volume value Dcom from a remote controller;
Means for storing the common volume value Dcom;
An electronic volume whose attenuation rate is controlled based on the stored common volume value Dcom;
A volume switch for indicating a specific volume value Dvol1 on the specific scale;
Means for converting the designated unique volume value Dvol1 to a common volume value Dcom based on the correspondence relationship;
Means for updating and registering the converted common volume value Dcom in the storage means. The electronic volume control device according to claim 1, further comprising: a unit that notifies the remote controller of the converted common volume value Dcom. The volume switch includes a first switch for increasing the specific volume value Dvol1 and a second switch for decreasing the specific volume value Dvol1,
The conversion means,
Means for, in response to the operation of the first switch, selecting, from the M unique volume values Dvol1, the unique volume value Dvol1 whose corresponding common volume value Dcom is closest to the current common volume value Dcom on the increasing side. ,
Means for selecting, in response to the operation of the second switch, a unique volume value Dvol1 whose corresponding common volume value Dcom is closest to the current common volume value Dcom on the decreasing side from among the M unique volume values Dvol1. ,
3. The electronic volume control device according to claim 1, further comprising means for converting the selected specific volume value Dvol1 to a common volume value Dcom. In a remote controller that remotely operates an electronic volume control device,
Means for managing the correspondence between the i-th common volume value Dcom [i] on the N-stage common scale and the k-th unique volume value Dvol2 [k] on the L-stage common scale;
Means for storing the current common volume value Dcom;
A volume switch for indicating a specific volume value Dvol2 on the specific scale;
Means for converting the instructed specific volume value Dvol2 to a common volume value Dcom based on the correspondence relationship;
Means for updating and registering the converted common volume value Dcom in the storage means;
Means for transmitting the converted common volume value Dcom to the electronic volume control device. Means for receiving a common volume value Dcom from the electronic volume control device;
5. The remote controller according to claim 4, further comprising: a unit that updates and registers the received common volume value Dcom in the storage unit. The volume switch includes a first switch for increasing a volume value and a second switch for decreasing a volume value,
The conversion means,
Means for selecting, from the L unique volume values Dvol2, a unique volume value Dvol2 whose corresponding common volume value Dcom is closest to the current common volume value Dcom on the increasing side in response to the operation of the first switch; ,
Means for selecting, from the L unique volume values Dvol2, a unique volume value Dvol2 whose corresponding common volume value Dcom is closest to the current common volume value Dcom on the decreasing side in response to the operation of the second switch; ,
6. A remote controller for an electronic volume control device according to claim 4, further comprising means for converting the selected specific volume value Dvol2 to a common volume value Dcom.

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