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DESCRIPTION JP2007324831

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DESCRIPTION JP2007324831
PROBLEM TO BE SOLVED: To provide an audio reproduction device and an audio
synchronization method of an audio reproduction system capable of synchronizing volume
settings among a plurality of audio reproduction devices for wirelessly communicating music
data. SOLUTION: A storage unit 18 for storing content information, a communication unit 11 for
transmitting content information to an external device 1 by wireless communication, a
reproduction unit 12 for reproducing content information according to a set volume, and a
reproduction volume The set volume of the reproduction unit is set and changed according to the
operation volume for outputting the operation signal for setting and the volume volume
information given via the operation signal from the operation unit or the communication unit,
and according to the volume setting. An audio reproduction apparatus 2 having a control unit 15
that controls to transmit the volume information to an external device via the communication
unit. [Selected figure] Figure 2
Audio reproduction apparatus and audio synchronization method of audio reproduction system
[0001]
The present invention relates to an audio reproduction apparatus and an audio synchronization
method of an audio reproduction system, which synchronizes the volume among a plurality of
audio reproduction apparatuses using wireless communication such as Bluetooth (registered
trademark).
[0002]
10-04-2019
1
As well known, many electronic devices using wireless communication are developed and
manufactured and widely used.
In such an electronic device, the operability for the user is improved by supplying various
operation information by the remote controller to the electronic device main body by wireless
communication.
[0003]
Patent Document 1 introduces a compound mobile communication terminal which can be
remotely controlled by one remote controller and which facilitates switching between a
telephone and another function. JP 10-94070 A
[0004]
However, in the conventional patent document 1, switching of a plurality of functions is merely
performed by a remote controller, and for example, audio reproduction can be performed
between the main player and headphones capable of wireless communication. In the device, for
example, it is not considered to solve the problem of supplying volume information. If the volume
information can not be synchronized in this way, even if the user adjusts the volume on one
device, the setting is not reflected on the other device.
[0005]
An object of the present invention is to provide an audio reproduction device and an audio
synchronization method of an audio reproduction system capable of synchronizing volume
settings among a plurality of audio reproduction devices that wirelessly communicate music data.
[0006]
The present invention sets a storage unit for storing content information, a communication unit
for transmitting the content information to an external device by wireless communication, a
reproduction unit for reproducing the content information according to a set volume, and a
reproduction volume. And setting and changing the set volume of the reproduction unit in
accordance with an operation unit for outputting an operation signal for the user and the
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operation signal from the operation unit or volume information given through the
communication unit. And a control unit configured to control to transmit volume information
according to the volume to the external device via the communication unit.
[0007]
According to the present invention, it is possible to provide an audio reproduction device and an
audio synchronization method of an audio reproduction system capable of synchronizing volume
settings among a plurality of audio reproduction devices that wirelessly communicate music data.
[0008]
Hereinafter, embodiments of the present invention will be described in detail with reference to
the drawings.
FIG. 1 is an explanatory diagram for explaining an example of the operation of the audio
reproduction system according to the embodiment of the present invention, FIG. 2 is a block
diagram showing an example of the electrical configuration of the wireless headphones, and FIG.
4 is a block diagram showing an example of the electric configuration of the remote controller,
and FIG. 5 is an example of a change processing operation when there is a volume value change
in the same remote controller. FIG. 6 is a sequence diagram showing an example of the change
processing operation when there is a volume value change in the audio player, and FIG. 7 is an
example of the change processing operation when there is a volume value change in the same
wireless headphone. FIG. 8 is a sequence diagram showing an example of the change processing
operation when there is a volume value change in the audio player as well. That.
[0009]
<One Example of Audio Reproduction System According to One Embodiment of the Present
Invention> (System Configuration) First, an outline and an operation of the audio reproduction
system according to one embodiment of the present invention will be described.
FIG. 1 is a block diagram of a wireless headphone 1, an audio player 2 and a remote controller 3
according to an embodiment of the present invention.
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3
[0010]
(Configuration of Wireless Headphones) The wireless headphone 1 is a general wireless
headphone equipped with a Bluetooth (registered trademark) communication function, and a
volume button for adjusting the volume (hereinafter, local volume) reproduced by the wireless
headphone 4 and a volume display unit 5, and a playback control button 5-2 for the user to
control playback.
[0011]
Next, the electrical configuration of the wireless headphone 1 will be described with reference to
FIG.
The wireless headphone 1 according to this embodiment includes, for example, a communication
unit 11 using Bluetooth (registered trademark) or the like, SBC (Sub Band Codec), AAC (Advanced
Audio Coding), MP3 (MPEG-1 Audio Level-3) or the like. A playback unit 12 for playing back
audio content according to the encoding scheme, an audio unit 13 for realizing an appropriate
volume, sound quality, and sound space, a speaker 14 for receiving this output, and a control unit
15 for controlling the overall operation. It includes a display unit 5 for displaying a volume and
the like, a volume button 4 for adjusting the volume (hereinafter referred to as a local volume)
reproduced by the wireless headphone, and a reproduction control button 5-2 for the user to
control reproduction. It has an operation unit 4, 5-2.
[0012]
(Configuration of Audio Player) Next, the electrical configuration of the audio player will be
described using FIGS. 1 and 3. FIG.
The audio player 2 according to the present embodiment includes, for example, a communication
unit 11 using Bluetooth (registered trademark) or the like, a reproduction unit 12 for
reproducing music content according to a coding method such as SBC, MP3, etc. It has an audio
unit 13 for realizing a sound space, and a control unit 15 for controlling the overall operation.
Furthermore, the audio player 2 has an operation unit 7 with a cross key as an example for
causing the user to perform various controls of the audio player and volume adjustment, and a
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display unit 6 for displaying current music information and the like. .
[0013]
(Configuration of Remote Controller) Next, an electrical configuration of the remote controller 3
will be described using FIGS. 1 and 4. The remote controller 3 has a communication unit 11
using, for example, Bluetooth (registered trademark) or the like, and a control unit 15 that
controls the overall operation. Furthermore, the remote controller 3 includes an operation unit 8
including a reproduction control button 8 for performing reproduction control of the audio
player connected by Bluetooth (registered trademark) by the user and a volume button 9 for
adjusting the volume of the audio player. 9 and a display unit 10 for displaying music
information currently reproduced by the audio player, displaying the current volume value of the
audio player, and the like.
[0014]
(Operations) The wireless headphones 1 and the audio player 2 perform wireless connection with
each other through Bluetooth (registered trademark) communication units through the antennas
mounted thereon, and transmit and receive data. Here, the wireless headphone 1 and the audio
player 2 transfer Advanced Wireless Distribution Profile (A2DP), which is a profile for
transmitting Bluetooth (registered trademark) audio data, and a control signal for remote control.
It communicates with the profile Audio Video Remote Control Profile (AVRCP). At this time, the
audio player 2 functions as a transmitter (SRC) of A2DP and also functions as a target (TG) of
AVRCP.
[0015]
In addition, the wireless headphone 1 functions as a receiver (SNK) of A2DP and also functions as
a controller (CT) of AVR CP. As a result, the music reproduced by the audio player 2 is
transmitted to the wireless headphone 1 by the A2DP, whereby the wireless headphone 1 can
listen to music wirelessly.
[0016]
In addition, by transmitting a control signal according to the reproduction control button 5-2
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equipped to the wireless headphone 1 as a command to the audio player 2 by the AVR CP,
various reproduction control instructions (reproduction, stop, It is possible to perform pause,
fast-forward, rewind, etc. wirelessly from the wireless headphone 1.
[0017]
Also, the wireless headphone 1 controls the volume adjustment of the music received by A2DP in
conjunction with the operation of the volume button 4 to perform control to increase or decrease
the local volume of the wireless headphone 1 to set the volume the viewer likes It is possible.
[0018]
Also, commands of volume up and volume down when the volume button 4 is pressed are
notified to the audio player 2 as commands of AVRCP.
[0019]
The music data transmitted from the audio player 2 is music data output from the line out or
music data output from the digital out, and since it is data of a constant volume, the wireless
headphone 1 from the audio player 2 The volume of the music data to be output to can not be
adjusted without being interlocked with the volume value of the audio player 2.
[0020]
Between the audio player 2 and the remote controller 3, wireless communication is performed
between Bluetooth (registered trademark) communication units through antennas mounted on
the respective devices, and data transmission / reception is performed.
Here, transmission / reception of the set volume value is performed according to the mechanism
of remote control by AVRCP of Bluetooth (registered trademark).
At that time, the audio player 2 functions as an AVR CP target (TG).
[0021]
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Also, the remote controller 3 functions as a controller (CT) of the AVR CP.
A control signal corresponding to the operation by the reproduction control button 8 provided in
the remote controller 3 is transmitted to the audio player 2 as a command of AVRCP.
As a result, the remote controller 3 can issue various playback control instructions (play, stop,
pause, fast forward, rewind, etc.) of the audio player 2, and the volume adjustment button 9 is
operated to increase or decrease the volume. A signal can be transmitted wirelessly from the
remote controller 3 to the audio player.
[0022]
However, as described above, the volume value change command for the audio player 2 from the
remote controller 3 affects only the local volume of the audio player 2, and the volume of the
music data transmitted to the wireless headphone 1 by A2DP There is no impact.
[0023]
Each device of this embodiment transmits a volume value change notification reservation
command to the other device in order to notify the volume information when the volume setting
is changed in order to synchronize the set volume.
The device that has received the volume value change notification reservation transmits, as an
immediate response, the current set volume as volume information (hereinafter referred to as
volume value change notification reservation response 1), and changes if the set volume changes.
The subsequent set volume is transmitted as volume information (hereinafter, volume value
change reservation response 2).
[0024]
It is assumed that these volume value change notification reservation commands and the volume
value change notification reservation responses 1 and 2 which are the responses thereof are
defined as a vendor dependent command of AVRCP.
[0025]
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7
(Operation explanation using a flow chart)-Volume value change operation with the remote
controller Next, according to the volume increase instruction from the remote controller 3 using
FIG. 5, the volume of the wireless headphone 1 is changed via the audio player 2 The process to
be performed will be described.
[0026]
First, a volume value change notification request command is issued from the wireless
headphone 1 to the audio player 2 (S1).
As a result, in the audio player 2, the volume value change notification response process shown
in FIG. 6 is started, and from the audio player 2, the current volume of the audio player 2 held by
the current audio player as the volume value change notification request response 1. The value is
transmitted to the wireless headphone 1 (S2).
[0027]
After this, for example, it is assumed that the user operates the volume control button 9 of the
remote controller 3 and inputs the volume increase (S3).
In response to the input, the remote controller 3 transmits to the audio player 2 a volume up
command to increase the volume setting of the audio player 2 (S4).
[0028]
The audio player 2 changes (increases) the held current volume setting in accordance with the
volume up command, and also changes the volume display on the display unit 6 (S5). Further, the
audio player 2 notifies the wireless headphone 1 of the volume value as the volume value change
notification request response 2 to the wireless headphone 1 by the response process to the
volume value change notification request received in S1 (S6).
[0029]
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8
As a result, the wireless headphone 1 adjusts the local volume value, which is the volume setting
of its own, to the volume value notified from the audio player 2 (S7). As a result, the volume
increase control from the remote controller 3 indirectly It is possible to increase the local volume
value of the wireless headphone 1.
[0030]
When the user operates the volume adjustment button 9 of the remote controller 3, the
processing after S 1 is repeated.
[0031]
Volume Value Change Processing in Audio Player Next, volume value change notification
response processing in the audio player 2 will be described using the flowchart in FIG.
[0032]
When the audio player 2 receives the volume value change notification request (S11), the audio
player 2 holds the current volume value as the volume value at the time of the request (S12).
Next, the audio player 2 returns the value held in S12 as the current volume value as the volume
value change notification response 1 to the other party who has issued the volume value change
notification request (S13).
[0033]
After that, the auditory player 2 compares the current volume value with the requested volume
value held in S12 by monitoring processing or the like at a constant interval, and determines
whether there is a change in the value (S14).
If it is determined that there is no change in the value, the same comparison is again determined
(NO in S14).
If it is determined that there is a change in the volume value (YES in S14), the audio player 2
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returns the changed volume value as the volume value change notification response 2 to the
other party who has issued the volume value change notification request (S15). ).
[0034]
Volume Value Change Operation with Wireless Headphones Next, processing for notifying the
remote controller 3 of the volume value via the audio player 2 by volume control in the wireless
headphone 1 will be described using the flowchart in FIG. 7.
[0035]
First, a volume value change notification request command is issued from the remote controller 3
to the audio player 2 (S21).
As a result, the volume value change notification response process for the remote controller 3 is
activated, and the audio player 2 transmits the volume value currently held by the audio player 2
as the volume value change notification request response 1 to the remote controller 3 ( S22).
[0036]
At the same time, next, a volume value change notification request command is issued from the
wireless headphone 1 to the audio player 2 (S23). As a result, the volume value change
notification response process for the wireless headphone 1 is activated, and the audio player 2
transmits the volume value currently held by the audio player 2 as the volume value change
notification request response 1 to the wireless headphone 1 ( S24).
[0037]
Thereafter, a volume up command for increasing the volume of the audio player 2 is transmitted
to the audio player 2 as a command of AVRCP from the wireless headphone 1 where the user
operates the volume control button 4 (S26).
[0038]
Thus, the audio player 2 increases the value of the set volume and updates the volume display on
the display unit 6 (S27).
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10
[0039]
Further, the audio player 2 notifies the wireless headphone 1 and the remote controller 3 of the
volume value changed as the volume change notification request response 2 from the audio
player 2 according to the change of the set volume (S28, S30).
[0040]
When receiving the volume value change notification request response 2, the remote controller 3
changes to the set volume according to the volume value after the change, and also changes the
volume display on the display unit 10 (S31).
Similarly in the wireless headphone 1, the set volume is changed according to the changed
volume value, and the volume display is also changed (S29).
[0041]
In this manner, the local volume value of the wireless headphone 1 and the volume value
displayed on the display unit 10 of the remote controller 3 can be synchronized with the volume
value of the audio player 2.
[0042]
Even after that, when the user operates the volume control button 4 of the wireless headphone 1,
the processing from S21 to S31 is repeated.
[0043]
-Volume Value Change Operation in Audio Player Next, processing when the volume value of the
audio player 2 is changed by the button operation of the audio player 2 will be described using
FIG.
[0044]
First, a volume value change notification request command is issued from the remote controller 3
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to the audio player 2 (S31).
As a result, the volume value change notification response process for the remote controller 3 is
activated, and the audio player 2 transmits the volume value currently held by the audio player 2
as the volume value change notification request response 1 to the remote controller 3 ( S32).
[0045]
At the same time, a volume value change notification request command is issued from the
wireless headphone 1 to the audio player 2 (S33).
As a result, the volume value change notification response process for the wireless headphone 1
is activated, and the audio player 2 transmits the volume value currently held by the audio player
2 as the volume value change notification request response 1 to the wireless headphone 1 ( S34).
[0046]
Thereafter, the user operates the volume button 7 of the audio player 2 to input a volume up
instruction (S35).
Thus, the audio player 2 increases its own set volume.
Further, with the change of the set volume, the audio player 2 notifies the wireless headphone 1
of the increased volume value as the volume value change notification request response 2 (S36).
As a result, processing is performed to change the local volume value, which is the set volume in
the wireless headphone 1, in accordance with the volume value notified from the audio player 2
(S38).
[0047]
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The audio player 2 also notifies the remote controller 3 of the increased volume value as the
volume value change notification request response 2 (S37). The set volume of the remote
controller 3 is changed using the notified volume value, and the area displaying the volume value
of the audio player 2 of the display unit 10 is updated (S39).
[0048]
Even after that, when the user operates the audio play and the operation switch 7 of 2 to change
the volume, the processing from S31 to S39 is repeated.
[0049]
After that, an instruction to increase the volume is generated by the operation of the volume
button 7 of the audio player 2 by the user (S35).
As a result, as the current volume value of the audio player 2 increases, the volume value
increased as the volume value change notification request response 2 from the audio player 2 to
the wireless headphone 1 is sent to the wireless headphone 1 as an AVRCP command. It is
notified (S36). As a result, in the wireless headphone 1, processing is performed to adjust the
local volume value to the volume value notified from the audio player 2 (S38).
[0050]
Further, the audio player 2 also notifies the remote controller 3 of the increased volume value as
a vendor dependent command of AVRCP as the volume value change notification request
response 2. The area displaying the volume value of the audio player 2 of the display unit 10 of
the remote controller 3 is updated using the notified volume value (S37).
[0051]
Thereby, in the remote controller 3, the volume information after the change is changed to the
set volume, and the volume display is also changed to this (S39).
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[0052]
In this manner, the local volume value of the wireless headphone 1 and the volume value
displayed on the display unit 10 of the remote controller 3 can be synchronized with the volume
value of the audio player 2.
[0053]
Even after that, when the user operates the audio play and the operation switch 7 of 2 to change
the volume, the processing from S31 to S39 is repeated.
[0054]
In the embodiment described above, the case where three devices of the wireless headphone 1,
the audio player 2 and the remote controller 3 are simultaneously connected has been
mentioned, but only the wireless headphone 1 and the audio player 2 are connected Also, even
when only the audio player 2 and the remote controller 3 are connected, it is possible to
synchronize the volume value between the two devices by the volume value change notification
response process, which is also preferable.
[0055]
As described above, in the audio system according to the present embodiment, the volume
synchronization function using, for example, the above-mentioned AVRCP vendor dependent
command or the like causes the volume of the device that is not directly connected without
establishing a direct radio link by the volume synchronization function. Can be controlled, and
the volume value can be synchronized, which can enhance the convenience of the device.
[0056]
Similarly, the volume synchronization function using AVRCP's vendor dependent command, etc.
behaves as if the music data transmitted from audio player 2 at a constant volume is changed as
if the volume setting of audio player 2 was changed. Thus, the local volume of the wireless
headphone 1 can be changed.
[0057]
Similarly, the communication rate that occurs when the wireless headphone 1 and the remote
controller 3 newly establish a link between the wireless headphone 1 and the remote controller 3
can be synchronized without the wireless headphone 1 and the remote controller 3 directly
linking the wireless wireless link. It is possible to prevent the deterioration of voice quality such
as skipping due to the decrease of
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[0058]
While the various embodiments described above enable those skilled in the art to realize the
present invention, it is easy for those skilled in the art to further come up with various
modifications of these embodiments and have inventive capabilities. However, the present
invention can be applied to various embodiments.
Therefore, the present invention covers a wide range not inconsistent with the disclosed principle
and the novel features, and is not limited to the above-described embodiment.
[0059]
Explanatory drawing explaining an example of operation | movement of the audio | voice
reproduction system which concerns on one Embodiment of this invention.
FIG. 2 is a block diagram showing an example of an electrical configuration of a wireless
headphone according to an embodiment of the present invention.
FIG. 1 is a block diagram showing an example of an electrical configuration of an audio player
according to an embodiment of the present invention.
FIG. 2 is a block diagram showing an example of an electrical configuration of a remote
controller according to an embodiment of the present invention.
FIG. 10 is a sequence diagram showing an example of a change processing operation when there
is a volume value change in the remote controller according to the embodiment of the present
invention.
FIG. 10 is a sequence diagram showing an example of a change processing operation when there
is a volume value change in the audio player according to the embodiment of the present
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invention.
FIG. 10 is a sequence diagram showing an example of a change processing operation when there
is a volume value change in the wireless headphones according to the embodiment of the present
invention. FIG. 10 is a sequence diagram showing an example of a change processing operation
when there is a volume value change in the audio player according to the embodiment of the
present invention.
Explanation of sign
[0060]
DESCRIPTION OF SYMBOLS 1 ... Wireless headphone, 2 ... Audio player, 3 ... Remote controller, 4
... Volume button, 5 ... Volume indicator, 6 ... Display, 7 ... Operation switch, 8 ... Operation button,
9 ... Volume button, 10 ... Display.
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