JP2004040625

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DESCRIPTION JP2004040625
The present invention provides a voice control means capable of easily turning on and off an
output of a subwoofer according to a viewing environment and at the same time obtaining an
optimum acoustic characteristic. SOLUTION: A subwoofer mute which detects a subwoofer as a
mute by setting by either one of the case where the subwoofer is set to none by the speaker
setting means 1 and the case where the subwoofer volume is turned off by the subwoofer volume
setting means 2 The acoustic characteristic switching unit 4 switches acoustic characteristics
based on the detection unit 7 and the presence or absence of the speaker set by the speaker
setting unit 1 and the mute of the subwoofer detected by the subwoofer mute detection unit 7.
The acoustic characteristic switching unit 4 sets the same acoustic characteristic in the case
where the subwoofer is set to no by the speaker setting unit 1 and in the case where the
subwoofer is turned off by the subwoofer volume setting unit 2. [Selected figure] Figure 1
Voice control means and voice control program
The present invention relates to an audio control means and an audio control program of a
surround system constituted by audio output of a plurality of channels, and more specifically, the
acoustic characteristic is determined depending on the presence or absence of a subwoofer The
present invention relates to an audio control means to be switched and an audio control
program. FIG. 6 is a block diagram of a conventional voice control means. In FIG. 6, 1 is a speaker
setting means capable of independently setting the presence or absence of speakers of a plurality
of audio output channels, 2 is a subwoofer volume setting means capable of independently
setting the volume of a subwoofer, 3 is an audio other than the subwoofer Volume balance
setting means for setting the volume balance of the output channel, 4 is an acoustic
characteristic switching means for switching acoustic characteristics outputted from a plurality
of audio output channels based on the presence or absence of the speaker set by the speaker
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setting means 1, 5a is an acoustic It is a subwoofer volume switching means for switching the
volume of the subwoofer to which the sound characteristics outputted by the characteristic
switching means 4 and the setting contents in the subwoofer volume setting means 2 are
inputted. Similarly, 5b, 5c, 5d, and 5e are the sound characteristics output by the sound
characteristic switching unit 4 and the setting contents of the volume balance setting unit 3,
respectively, and the front L, front R, center, and rear voices are input. It is volume switching
means for switching the volume of the output channel. Reference numerals 6a, 6b, 6c, 6d and 6e
denote output means including main amplifiers of the audio output channels connected to the
volume switching units 5a, 5b, 5c, 5d and 5e, respectively. Connected to the speaker. Next, the
operation of the conventional voice control means shown in FIG. 6 will be described. First, the
speaker setting unit 1 sets the presence or absence of the speakers of the plurality of audio
output channels independently. Specifically, along the menu screen as shown in FIG. 7, settings
are made for each audio output speaker, such as the presence or absence of the center, the
presence or absence of the rear, and the presence or absence of the subwoofer. Based on the
presence or absence of the speaker set by the speaker setting unit 1, the acoustic characteristic
switching unit 4 switches the acoustic characteristics output from the plurality of audio output
channels in order to create an optimal sound field. As a result, surround sound of a plurality of
channels input to the acoustic characteristic switching means 4 is remodeled into optimal
acoustic characteristics and inputted to the volume switching means 5a, 5b, 5c, 5d, 5e of each
audio output channel.
On the other hand, since the sound pressure level at the position of the user differs depending on
the efficiency and installation distance of the speakers connected to the audio output of each
channel, it is necessary to adjust the volume balance. Here, for the audio output channels other
than the subwoofer, the volume balance may be set in advance when the speakers are installed,
and the volume balance setting unit 3 adjusts the volume in the range of -10 dB to +10 dB of
each channel, The volume switching means 5b, 5c, 5d, 5e of each channel are controlled. As for
the volume of the subwoofer, it is necessary to adjust the volume appropriately according to the
source to be reproduced, the viewing environment, etc. It is adjusted by the subwoofer volume
setting means 2 which can. Specifically, the setting screen as shown in FIG. 8 is called, and
adjustment is made in the range of -10 dB to +10 dB. Furthermore, the subwoofer volume
switching means 5a is controlled by this adjusted content. Here, when the subwoofer volume
setting means 2 is configured by software, it may be configured by an algorithm as shown in FIG.
In the example of FIG. 9, the setting screen shown in FIG. 8 is displayed, and the volume of the
subwoofer can be lowered or raised, for example, by pressing the left key or the right key of the
cross key not shown. When the left key of the remote control is input and an instruction to
reduce the volume is issued (St11), the volume can be reduced by 1 dB until it reaches -10 dB,
but when the subwoofer volume setting value is already -10 dB, the left key Even if is input, the
volume can not be reduced below that (St12). On the other hand, when the right key of the
remote control is input and an instruction to increase the volume is issued (St13), the volume can
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be raised by 1 dB each time until it becomes +10 dB (St14). After the sound input to the volume
switching units 5a, 5b, 5c, 5d, and 5e of each audio output channel is controlled by the
subwoofer volume setting unit 2 and the volume balance setting unit 3, as described above, The
sound is output to each speaker (not shown) via the audio output means 6a, 6b, 6c, 6d, 6e of
each audio output channel. [0008] Since the conventional voice control means is configured as
described above, when it is desired to completely cut off the subwoofer, for example, when
watching late at night, it is further preferable to use bass as another means. When it is desired to
output from a speaker with a relatively small bass reproduction capability, etc., the subwoofer
volume setting means 2 can not be used, and the setting screen of FIG. It required complicated
operations.
As a method of solving this problem, even if the setting of the subwoofer in the speaker setting
means 1 is Yes , the subwoofer is displayed on the setting screen as shown in FIG. 10 as the
subwoofer volume setting means 2. If "off" is selected, one that can set mute can be considered.
However, in this case, when the setting of the subwoofer in the speaker setting means 1 and the
setting of the subwoofer in the subwoofer volume setting means 2 are different, it is necessary to
take consistency. In addition, when a mode in which the output audio channel is limited to the
front L and the front R, such as a stereo mode, is selected, a system may be considered in which
the subwoofer is also automatically set to mute. However, when speakers with small bass
reproduction capability are connected as the front L and the front R, there is a problem that the
bass can not be reproduced in the stereo mode. The present invention has been made to solve
the above-mentioned problems, and the user can easily switch on and off the output of the
subwoofer according to the viewing environment, and at the same time, the optimum sound can
be obtained by a simple operation method. It is an object of the present invention to provide
voice control means capable of obtaining characteristics and a voice control program. The audio
control means of the present invention is a speaker setting means capable of independently
setting the presence or absence of speakers of a plurality of audio output channels including a
subwoofer, and the volume of the subwoofer One of the independently settable subwoofer
volume setting means, the case where the subwoofer is set to be absent in the speaker setting
means, and the case where the subwoofer is set to turn off the volume in the subwoofer volume
setting means The plurality of audio outputs based on the subwoofer mute setting means for
muting the subwoofer by the setting by the user, the presence or absence of the speaker set by
the speaker setting means, and the mute of the subwoofer set by the subwoofer mute setting
means Turn off the sound characteristics output from the channel And the acoustic characteristic
switching means is set to turn off the subwoofer in the speaker setting means and set to turn off
the volume of the subwoofer in the subwoofer volume setting means. In the above, the acoustic
characteristics are set to be the same. Further, according to the voice control program of the
present invention, the case where the subwoofer is set to be absent in the speaker setting means
capable of independently setting the presence or absence of speakers of a plurality of audio
output channels including the subwoofer in the computer A subwoofer mute setting step of
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muting the subwoofer by setting by one of the subwoofer volume setting means capable of
independently setting the volume of the subwoofer when the subwoofer volume is set to be
turned off, and the speaker setting An acoustic characteristic switching step of switching acoustic
characteristics outputted from the plurality of audio output channels based on the presence or
absence of the speaker set by the unit and the mute of the subwoofer set by the subwoofer mute
setting unit Voice control program for In the acoustic characteristic switching step, the case
where the subwoofer is set to be absent in the speaker setting means and the case where the
subwoofer is turned off in the subwoofer volume setting means are set as described above. It is
characterized in that the acoustic characteristics are set to the same one.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The voice control means
according to the present invention will be specifically described below with reference to the
drawings showing an embodiment thereof. In the drawings, the same reference numerals indicate
the same or corresponding parts as in the prior art. Embodiment 1 FIG. 1 is a block diagram
showing an audio control means according to the first embodiment. In FIG. 1, reference numeral
1 denotes speaker setting means capable of independently setting the presence or absence of
speakers of a plurality of audio output channels, for example, speakers input along a menu
screen shown in FIG. The presence or absence of is set respectively. 2 is a subwoofer volume
setting means capable of independently setting the volume of the subwoofer; for example, along
with the setting screen shown in FIG. 10, in addition to the -10 dB to +10 dB 1 dB step as a
setting value, "OFF" is also input It is possible. 7 mutes the subwoofer by setting by either the
case where the subwoofer is set to "absent" in the speaker setting means 1 or the case where the
subwoofer volume is set to "off" in the subwoofer volume setting means 2 It is a subwoofer mute
setting means. Reference numeral 3 denotes volume balance setting means for setting the
volume balance of audio output channels other than the subwoofer. An acoustic characteristic
switching unit 4 switches acoustic characteristics output from a plurality of audio output
channels based on the presence or absence of a speaker set by the speaker setting unit and the
mute of the subwoofer set by the subwoofer mute setting unit 7. This will be described later. 5a
is a subwoofer volume to which the volume of the subwoofer is switched when the acoustic
characteristic outputted by the acoustic characteristic switching means 4, the setting contents in
the subwoofer volume setting means 2, and the mute of the subwoofer set by the subwoofer
mute setting means 7 are inputted. It is a switching means. 5b, 5c, 5d, and 5e are the sound
characteristics output by the sound characteristic switching unit 4 and the setting contents of the
volume balance setting unit 3, respectively, and the front L, front R, center, and rear sound
output channels Volume switching means for switching the volume of Reference numerals 6a,
6b, 6c, 6d and 6e denote output means including main amplifiers of the audio output channels
connected to the volume switching units 5a, 5b, 5c, 5d and 5e, respectively. Connected to the
speaker. FIG. 2 is a block diagram showing an example of the acoustic characteristic switching
means 4 for the acoustic characteristics outputted from the front L, the front R and the
subwoofer among the plurality of audio output channels.
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10 is an audio input terminal of the front L and the front R, and 11 is an audio input terminal of
the subwoofer. Reference numeral 12 denotes a high pass filter (HPF) for passing the sound
input from the sound input terminal 10 except for the deep bass component. Reference numeral
13 denotes switching means for switching between the audio input from the audio input terminal
10 and the output of the HPF 12 based on the setting contents of the speaker setting means 1
and the setting of the subwoofer mute setting means 7. Reference numeral 14 denotes an adder
of the output of the switching means 13 and the sound inputted from the sound input terminal
11 of the subwoofer. Reference numeral 15 denotes switching means for switching whether or
not the audio inputted from the audio input terminal 11 of the subwoofer is added in the adder
14 based on the setting contents of the speaker setting means 1 and the setting of the subwoofer
mute setting means 7. Reference numeral 16 denotes a low pass filter (LPF) which allows only
the deep bass component of the voice input from the voice input terminal 10 to pass. An adder
17 adds the output of the LPF 16 and the audio input from the audio input terminal 11 of the
subwoofer. A switching unit 18 switches whether to add the output of the LPF 16 to the
subwoofer sound based on the setting contents of the speaker setting unit 1 and the setting of
the subwoofer mute setting unit 7. 19 is an audio output terminal of front L and front R, and 20
is an audio output terminal of the subwoofer. Next, the operation of the voice control means of
the first embodiment shown in FIG. 1 will be described. First, the speaker setting unit 1 sets the
presence or absence of the speakers of the plurality of audio output channels independently.
Specifically, according to the menu screen as shown in FIG. 7, the sound output speakers such as
the presence / absence of the center, the presence / absence of the rear, and the presence /
absence of the subwoofer are input to set the presence / absence of each speaker. In the
subwoofer volume setting means 2, the volume of the subwoofer is independently set by
inputting along the setting screen shown in FIG. 10, for example. Here, setting of mute is also
possible. Next, the subwoofer is set by the subwoofer mute setting means 7 to absent in the
speaker setting means 1 or by the subwoofer volume setting means 2 to set the subwoofer
volume to off . Mute the subwoofer by setting. As a result, the subwoofer can be turned on
and off easily to adjust the volume level when the user wants to turn off the subwoofer, such as
when watching at midnight, or when he / she wants the subwoofer to be effective when viewing
in stereo mode.
Furthermore, in the case where the subwoofer is set to "Yes" in the speaker setting means 1 and
the volume of the subwoofer is set to "off" in the subwoofer volume setting means 2, the speaker
setting means 1 In the case where the setting of the subwoofer in the above and the setting of
the subwoofer in the subwoofer volume setting means 2 are different, it is possible to achieve
consistency with a simple circuit configuration. Based on the presence or absence of the speaker
set by the speaker setting unit 1 and the mute of the subwoofer set by the subwoofer mute
setting unit 7, the acoustic characteristic switching unit 4 outputs the sound output from the
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plurality of audio output channels. The characteristics are switched. The acoustic characteristic
switching unit 4 sets the same acoustic characteristic in the case where the subwoofer is set to
"absent" in the speaker setting unit 1 and in the case where the subwoofer volume is set to "off"
in the subwoofer volume setting unit 2 Be done. In the acoustic characteristic switching means 4,
as shown in FIG. 2, for the sound inputted from the sound input terminal 10 of the front L and
the front R, the setting contents of the speaker setting means 1 and the subwoofer by the
switching means 13. Based on the setting of the mute setting means 7, switching between the
voice inputted from the voice input terminal 10 and the output of the HPF 12 is performed, and
the setting contents of the speaker setting means 1 and the subwoofer mute setting means by the
switching means 18 Based on the setting of 7, switching of whether to add the output of the LPF
16 to the voice input from the subwoofer voice input terminal 11 is performed in the adder 17.
As for the audio input from the audio input terminal 11 of the subwoofer, the audio input from
the audio input terminal 11 by the switching unit 15 based on the setting contents of the speaker
setting unit 1 and the setting of the subwoofer mute setting unit 7 is The adder 14 switches
whether to add or not. When the subwoofer mute setting means 7 mutes the subwoofer, no
output is made from the audio output terminal 20 of the subwoofer by switching the switching
means 15 and the switching means 18 (both are solid lines in FIG. 2), The audio output of the
subwoofer is added to the front L and the front R in the adder 14 and the result is output from
the audio output terminal 19 of the front L and the front R. In this case, the switching means 13
is switched to the audio side input from the audio input terminal 10 of the front L and the front R
(solid line side in FIG. 2), and the audio output of the subwoofer is added.
An example of the acoustic characteristic when the subwoofer mute setting means 7 mutes the
subwoofer is shown in FIG. In FIG. 3, the subwoofer when the frequency is f or less is usually
about 100 Hz or less. As shown in FIG. 3, subwoofer audio of frequency f or lower is
automatically superimposed on front L and front R, so extra sources such as DVDs are strongly
required to reproduce subwoofer audio. Do not require any On the other hand, when the
subwoofer mute setting unit 7 does not mute the subwoofer, the switching unit 15 is switched
(dotted line side in FIG. 2) so that the subwoofer audio output is made from the subwoofer audio
output terminal 20. Ru. In this case, the switching unit 13 is switched to the output side of the
HPF 12 (dotted line in FIG. 2). Further, the switching means 18 is switched so that the output of
the LPF 16 is added to the sound of the subwoofer (dotted line side in FIG. 2), and the deep bass
components of the front L and the front R are transferred to the subwoofer sound. An example of
the acoustic characteristic when the subwoofer mute setting means 7 does not mute the
subwoofer is shown in FIG. Also in FIG. 4, the subwoofer is the case where the frequency is f or
less. The deep bass components of the front L and the front R are transferred to the sound of the
subwoofer. Thus, the surround sound of the plurality of channels input to the acoustic
characteristic switching means 4 is remodeled into the optimum acoustic characteristic, and the
volume switching means 5a, 5b, 5c, 5d, 5e of each audio output channel are produced. Is input to
For the subwoofer, the volume is set by the subwoofer volume setting means 2 and the channel
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volume switching means 5a is controlled. For the audio output channels other than the
subwoofer, the volume is adjusted in the range of -10 dB to +10 dB of each channel by the
volume balance setting unit 3, and the volume switching units 5b, 5c, 5d and 5e of each channel
are controlled. The volume switching units 5a, 5b, 5c, 5d and 5e of the audio output channels are
inputted from the acoustic characteristic switching unit 4 based on the setting contents of the
subwoofer volume setting unit 2 and the volume balance setting unit 3, respectively. Switch the
volume of each audio channel. The outputs of the volume switching units 5a, 5b, 5c, 5d and 5e of
the respective audio output channels are respectively output from the respective speakers 6a, 6b,
6c,... (Not shown).
Second Embodiment The subwoofer volume setting means 2 and the subwoofer mute setting
means 7 will be described in more detail. FIG. 5 shows an algorithm in the case where the
subwoofer volume setting means 2 and the subwoofer mute setting means 7 are configured by
software. In FIG. 5, the setting screen shown in FIG. 8 is displayed, and the volume of the
subwoofer can be lowered or raised, for example, by pressing the left key or the right key of the
cross key not shown. When the left key of the remote control is input and a command to reduce
the volume is issued (St1), the volume can be reduced by 1 dB at a time to -10 dB (St2). Here,
when the setting value in the subwoofer volume setting means 2 is already −10 dB, when the
left key is inputted by the user, the subwoofer mute setting step corresponding to the subwoofer
mute setting means 7 is judged to be mute. The subwoofer is muted, and the acoustic
characteristic switching means 4 is controlled to switch to the same acoustic characteristic
(denoted as acoustic characteristic 1 in FIG. 5) as in the case where the subwoofer is previously
set to be absent by the speaker setting means 1. Conversely, when the right key of the remote
control is input and a command to increase the volume is issued (St3), it is until +10 dB unless
the subwoofer mute setting means 7 is muted (St4) The volume can be increased by 1 dB. When
the setting value in the subwoofer volume setting means 2 is muted (St 4) and the user inputs the
right key, the subwoofer mute setting step corresponding to the subwoofer mute setting means 7
determines that the mute is canceled, The subwoofer is unmuted and the volume level is set to 10 dB. Furthermore, the acoustic characteristic switching means 4 is controlled to switch to the
same acoustic characteristic (denoted as acoustic characteristic 2 in FIG. 5) as in the case where
the subwoofer is present. Since the present invention is configured as described above, the
following effects can be obtained. According to the present invention, the subwoofer mute setting
means is set by one of the case where the subwoofer is set to no in the speaker setting means
and the case where the subwoofer volume is turned off in the subwoofer volume setting means.
The subwoofer is muted by this, and in the acoustic characteristic switching means, the acoustic
characteristics outputted from the plurality of audio output channels based on the presence or
absence of the speaker set by the speaker setting means and the mute of the subwoofer set by
the subwoofer mute setting means The sound characteristics are set to be the same between
when the speaker setting means is set to no subwoofer and when the subwoofer volume setting
means is set to turn off the subwoofer, the user can watch at midnight Subwoofer and so on
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When you want to turn off the subwoofer or when you want to use the subwoofer also when
viewing in stereo mode, you can easily turn on and off the subwoofer using the subwoofer
volume setting means, and adjust the volume level, and also the optimum sound Characteristics
can be obtained.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of
voice control means of Embodiment 1. FIG. FIG. 2 is a block diagram showing a configuration of
acoustic characteristic switching means of the first embodiment. FIG. 3 is an example of acoustic
characteristics when the subwoofer mute setting means mutes the subwoofer. FIG. 4 is an
example of an acoustic characteristic when the subwoofer mute setting unit does not mute the
subwoofer. FIG. 5 is a control algorithm in the subwoofer volume setting means and the
subwoofer mute setting means of the second embodiment. FIG. 6 is a block diagram showing a
configuration of conventional voice control means. FIG. 7 is an example of a setting screen in the
speaker setting means. FIG. 8 is an example of a setting screen in a conventional subwoofer
volume setting means. FIG. 9 is a control algorithm in the conventional subwoofer volume setting
means. FIG. 10 is an example of a setting screen in the subwoofer volume setting means.
Explanation of code 1 Speaker setting means, 2 subwoofer volume setting means, 3 volume
balance setting means, 4 acoustic characteristics switching means, 5a subwoofer volume
switching means, 5b front L volume switching means, 5c front R volume switching means, 5d
center Volume switching means, 5e Rear volume switching means, 6a subwoofer output, 6b front
L output, 6c front R output, 6d center output, 6e rear output, 7 subwoofer mute setting means.
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