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JPH10136484

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DESCRIPTION JPH10136484
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
control apparatus for controlling a sound field characteristic such as a digital signal processor
(hereinafter simply referred to as a DSP) or an equalizer which corrects and changes the sound
field characteristic of an acoustic signal by an acoustic device.
[0002]
2. Description of the Related Art Heretofore, such sound field characteristic control devices
include DSPs and equalizers.
[0003]
Here, the equalizer device will be described as an example.
[0004]
Such an equalizer device has a function capable of storing f-feature data corresponding to a
plurality of frequency characteristics (hereinafter simply referred to as f-features) curves. The ffeature data in this memory is preset channel key (hereinafter In accordance with the input
operation of the channel key, the f special data corresponding to the key is called, and the f
special feature of the sound signal is corrected based on the f special data.
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1
Also, the f-special curve was displayed on the display based on the f-special data.
[0005]
However, according to such an equalizer device, it becomes difficult to remember which f key
curve is stored in which channel key as the number of channels of the memory storing f data
increases. In this way, it is necessary to repeat the operation of operating the channel key to call
up and check the corresponding f characteristic curve until the desired f characteristic curve is
found out of a plurality of f characteristic curves, and thus the desired A situation occurred in
which the operation until searching for the special curve was very troublesome.
[0006]
Therefore, in order to cope with such a situation, there has been proposed a preset scan method
in which the operation for searching for a desired f characteristic curve from the memory is
good.
[0007]
The preset scan method is a method of sequentially calling f special data in the memory when
searching for a desired f special curve, and sequentially changing the f special of the acoustic
signal based on the called f special data. .
[0008]
That is, according to this preset scan method, the f characteristic curve stored in each channel
key is automatically made according to the input operation of the preset scan key (hereinafter
simply referred to as a scan key) provided in the equalizer device. The setting is held at the
desired f-characteristic curve by reading out sequentially at predetermined time intervals (for
example, 10 seconds interval) and operating the scan key again while the desired f-characteristic
curve is obtained.
[0009]
Therefore, according to such a preset scan method, the desired f characteristic curve is obtained
only by the start and end operations of the scan key without repeating the operation of the
preset channel key each time until the desired f characteristic curve is obtained. You can search
for and change settings.
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2
[0010]
SUMMARY OF THE INVENTION According to the equalizer apparatus as a sound field
characteristic control apparatus adopting the above-mentioned conventional preset scan method,
as shown in FIG. 12, f characteristic curve set immediately before the start of the preset scan is
obtained. If the channel number corresponding to the channel key of the special data concerned
is "3", channel number "4", channel number "5", channel number "6", channel number "1",
channel number "2", The acoustic signal is f-changed at predetermined time intervals based on
the f-characteristic data of each channel sequentially in the order of channel number "3".
[0011]
However, according to such a preset scan method, only relative comparison of f characteristic
curves in adjacent channels can be made, that is, if the channel number being read is "6", this
channel number 6 and Since only adjacent comparison with adjacent channel number 5 and
channel number 1 can be made, how much has the f characteristic curve of each channel
changed with respect to the original f characteristic curve set immediately before the start of the
preset scan Or, it is very difficult to perceptually recognize what kind of characteristics each fcharacter curve has with respect to the original f-character, because the f-character curve which
is the comparison reference changes There was a problem of being
[0012]
The present invention has been made in view of the above problems, and an object thereof is to
easily find desired sound field characteristics while surely recognizing each sound field
characteristic of each channel in the preset memory. An object of the present invention is to
provide a sound field characteristic control device.
[0013]
In order to achieve the above object, according to the sound field characteristic control apparatus
of the present invention, sound field characteristic data storing a plurality of sound field
characteristic data corresponding to each channel key is stored. Storage means, sound field
correction means for correcting an acoustic signal based on sound field characteristic data
currently set, input immediately before data storage means for storing sound field characteristic
data immediately before scan key input, and scan key According to the input, each sound field
characteristic data stored in the sound field characteristic data storage means and the sound field
characteristic data stored in the immediately preceding input data storage means are alternately
read out, and the read out sound field characteristic data And control means for causing the
sound field correction means to correct the sound field.
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[0014]
The sound field characteristic control device corresponds to, for example, an equalizer device or
a DSP.
[0015]
The channel key can be set to sound field characteristic data corresponding to each key by onetouch operation.
[0016]
The sound field characteristic data is, for example, equivalent to f characteristic data of an f
characteristic curve in the case of an equalizer device, and acoustic characteristic data (f
characteristic in order to change simulated sound field space such as HALL, DISCO etc. in the
case of DSP) , Delay time characteristics etc.).
[0017]
The scan key corresponds to an activation key for sequentially reading out the sound field
characteristic data stored in the sound field characteristic data storage means.
[0018]
The sound field characteristic data storage means corresponds to, for example, a preset memory,
and the data storage means immediately before input corresponds to, for example, a last position
memory.
[0019]
Therefore, according to the sound field characteristic control device according to claim 1 of the
present invention, according to the input of the scan key, each sound field characteristic data
stored in the sound field characteristic data storage means and the immediately preceding data
storage means are stored. Since the sound field characteristic data in the medium are alternately
read out and the sound field correction means is made to correct the sound field based on the
read sound field characteristic data, the sound field characteristic data storage means Since each
sound field characteristic corresponding to each stored channel key can be compared and heard
with the sound field characteristic immediately before the scan key input, the desired sound field
can be easily performed with a simple operation while surely recognizing each sound field
characteristic. Characteristics can be easily obtained.
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[0020]
Further, in the sound field characteristic control device according to claim 2 of the present
invention, in addition to the configuration according to claim 1, the data immediately before the
input is included in the sound field characteristic data stored in the sound field characteristic
data storage means. It has determination means for determining whether or not there is the same
sound field characteristic data as the sound field characteristic data stored in the storage means,
and the control means is controlled by the determination means in accordance with the input of
the scan key. If it is determined that there is the same sound field characteristic data, reading out
from the sound field characteristic data storage means related to the same sound field
characteristic data is prohibited, and sound field characteristic data other than the same sound
field characteristic data Is read out.
[0021]
Therefore, according to the sound field characteristic control device of claim 2 of the present
invention, in addition to the effect of claim 1 above, the data immediately before the input in the
sound field characteristic data stored in the sound field characteristic data storage means If there
is the same sound field characteristic data as the sound field characteristic data stored in the
storage means, reading out the sound field characteristic data related to the same sound field
characteristic data from the sound field characteristic data storage means is prohibited. Since the
sound field characteristic data other than the sound field characteristic data is read out, it is
possible to prevent the sound field characteristic of the acoustic signal based on the sound field
characteristic immediately before the scan key input being continuously set. It does not cause
any discomfort to the user.
[0022]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sound field characteristic
control apparatus according to an embodiment of the present invention will be described below
based on the drawings.
FIG. 1 is a block diagram showing a schematic configuration inside a sound field characteristic
control apparatus showing an embodiment of the present invention.
FIG. 2 is a block diagram showing a schematic configuration inside a microcomputer of the sound
field characteristic control device according to the present embodiment.
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[0023]
As the sound field characteristic control device 10 shown in FIG. 1, for example, a sound field
control circuit 12 which performs sound field correction on an acoustic signal obtained from an
acoustic device 11 which obtains an acoustic signal from a recording medium, and a beep when
changing the acoustic field characteristic. A beep sound generation circuit 13 to be generated, a
display 14 for displaying various information such as sound field characteristics, a display drive
circuit 15 for controlling display of the display 14, an operation panel 16 for inputting various
commands, and these A microcomputer 17 for controlling the entire sound field characteristic
control device 10 is provided.
[0024]
On the operation panel 16, a plurality of channel keys 16a and a scan key 16b are disposed.
[0025]
The channel keys 16a correspond to respective sound field characteristic data stored in a preset
memory, which will be described later, and sound field characteristic data corresponding to the
respective keys can be called up by operating the channel key 16a.
Here, the number of channel keys 16a is six.
[0026]
Further, the scan key 16b can sequentially call a plurality of sound field characteristic data
corresponding to each channel key 16a by one operation.
[0027]
Further, as shown in FIG. 2, the microcomputer 17 is currently set in the preset memory 21
storing the sound field characteristic data corresponding to the channel number and the channel
number corresponding to the channel key 16a, and the sound field control circuit 12 at present.
Last position memory (hereinafter simply referred to as LP memory ) 22 for storing the
sound field characteristic data and channel number etc. therein, and the preset scan memory
(hereinafter referred to as the memory for storing the sound field characteristic data and channel
number etc. And a timer 24 for counting the display time of the sound field characteristic
displayed on the display 14 and the like, and a CPU 25 for controlling the whole microcomputer
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17.
[0028]
Further, the sound field control circuit 12 changes the sound field characteristic by changing the
frequency characteristic and the delay time characteristic of the acoustic signal obtained from
the acoustic device 11 based on the sound field characteristic data from the microcomputer 17 It
is
[0029]
Next, the operation of the sound field characteristic control apparatus according to the present
embodiment will be described.
First, an operation when the sound field characteristic control device is applied to the equalizer
device will be described.
[0030]
In this equalizer apparatus, the sound field control circuit 12 is an equalizer circuit (hereinafter
simply referred to as an EQ circuit), and the preset memory 21 in the microcomputer 17
corresponds to each channel key 16a as shown in FIG. A channel number and f-specific data
corresponding to the channel number are stored, and the PS memory 23 displays f-specific data
and channel number n in scan display, and the LP memory 22 has f-specification currently set.
Data and channel number N are stored.
[0031]
Now, channel sound field characteristic setting processing by the channel key 16a of the
equalizer device will be described.
FIG. 4 is a flowchart showing the processing operation of the microcomputer 17 in the channel
sound field characteristic setting processing.
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[0032]
In this channel sound field characteristic setting process, the f key data corresponding to the
operated channel key 16a is read out by operating the channel key 16a, and the sound signal
obtained from the audio equipment 11 is read based on the f key data. Sound field correction is
performed by the EQ circuit 12 and output.
[0033]
In FIG. 4, the microcomputer 17 determines whether any one of the channel keys 16a is turned
on (step S11).
[0034]
If one of the channel keys 16a is turned on, f-specific data corresponding to the channel number
of the turned-on channel key 16a is read out from the preset memory 21, and this f-specific data
is set in the EQ circuit 12; The channel number and f-special data are stored in the LP memory
22 (step S12).
[0035]
The channel number N stored in the LP memory 22 and the curve f related to the data f are
displayed on the display 14 (step S13).
[0036]
It is determined whether or not the gain adjustment operation has been performed on the special
curve f being displayed on the display 14 (step S14).
If a gain adjustment operation is performed on the f characteristic curve in this display, the
setting of the EQ circuit is changed based on the f characteristic data of the f characteristic curve
after the gain adjustment operation being performed, and the LP memory 22 The channel
number currently stored is set to "0", and the data content of the special data stored is changed
and stored (step S15).
When the gain adjustment operation is performed in step S15, the reason why the channel
number in the LP memory 22 is set to 0 is the data content corresponding to the channel
key 16a stored in the preset memory 21. It is because they are different.
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[0037]
The special curve related to the special data stored in the LP memory 22 is displayed on the
display 14 and the channel number being displayed is extinguished (step S16), and the
processing operation of this channel sound field characteristic setting processing is ended. Do.
[0038]
Next, scan sound field characteristic setting processing by the scan key 16b of the equalizer
device will be described.
FIG. 5 is a flowchart showing the processing operation of the microcomputer 17 in the scan
sound field characteristic setting processing.
[0039]
The scan sound field characteristic setting process is one-touch operation of the scan key 16b,
based on the fspecial data stored in the preset memory 21 while always using the fspecial data
immediately before the scan key 16b input as the comparison reference characteristic. This is a
process of sequentially changing f characteristics of the audio signal obtained from the audio
device 11.
[0040]
In FIG. 5, the microcomputer 17 determines whether the scan key 16b is turned on (step S21).
If the scan key 16b is turned on, the channel number N stored in the LP memory 22 is
incremented by +1, the incremented channel number N is set as the channel number n, and the
channel number n is stored in the PS memory 23 (Step S22).
When the channel number n stored in the PS memory 23 becomes "7", the channel number n is
set to "1".
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[0041]
It is determined whether the channel number N stored in the LP memory 22 and the channel
number n stored in the PS memory 23 are different (step S23).
[0042]
If the channel numbers n and N are different from each other, the timer 24 is started to mute the
sound for one second, and the beep sound generation circuit 13 outputs a beep sound.
Then, during this audio mute, the f-special data corresponding to the channel number n stored in
the PS memory 23 is read from the preset memory 21 and the read f-special data is stored in the
PS memory 23.
Then, the f special data stored in the PS memory 23 is set in the EQ circuit 12, and the channel
number n stored in the PS memory 23 and the f special curve stored are displayed on the display
14, After releasing the voice mute, the voice is output (step S24).
[0043]
It is determined whether the timer 24 started in step S24 has counted 10 seconds (step S25).
If the timer 24 has counted 10 seconds, the timer 24 is started again to perform one second of
audio mute and generate a beep.
Then, the f-feature data stored in the LP memory 22 is read out, the EQ circuit 12 is reset based
on the f-feature data, and the f-feature curve based on the f-feature data is changed on the
display 14 After the mute cancellation, the voice is outputted (step S26).
[0044]
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10
It is determined whether the timer 24 started in step S26 has passed 10 seconds (step S27).
If the timer 24 has passed 10 seconds, the channel number n of the PS memory 23 is
incremented by +1, and the process proceeds to step S23 (step S28).
When the channel number n becomes "7" in the process of step S28, the channel number n is set
to "1".
[0045]
If the channel number N stored in the LP memory 22 is the same as the channel number n stored
in the PS memory 23 in step S23, the process proceeds to step S28.
[0046]
If it is determined in step S25 that the timer 24 has not passed 10 seconds, it is determined
whether the scan key 16b is turned on (step S29).
If the scan key 16b is turned ON, the f special data stored in the PS memory 23 and the channel
number n are transferred to the LP memory 22, and the data contents stored in the LP memory
22 are transferred. The special curve etc. is displayed on the display 14 based on the data
contents (step S30), and the scanning sound field characteristic setting process is ended.
[0047]
If it is determined in step S29 that the scan key 16b is not turned on, the process proceeds to
step S25.
[0048]
If it is determined in step S27 that the timer 24 has not passed 10 seconds, it is determined
whether the scan key 16b is turned on (step S31).
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11
If the scan key 16b is turned on, the scan sound field characteristic setting process is ended.
[0049]
If it is determined in step S31 that the scan key 16b is not turned on, the process proceeds to
step S27.
[0050]
As described above, according to the scanning sound field characteristic setting process, for
example, when music is listened to by f special data of the channel number "3" of the preset
memory 21, when the scan key 16b is turned ON, as shown in FIG. As described above, after
performing display and sound field correction for 10 seconds based on f special data of channel
number "4", f special data stored in LP memory 22, that is, based on f special data of channel
number "3" Display for 10 seconds and correct the sound field.
After that, after performing display and sound field correction for 10 seconds based on f special
data of channel number "5", f special data stored in LP memory 22, f special data of channel
number "6", LP memory The display and sound field correction are performed for 10 seconds in
the order of f special data stored in 22 and f special data of channel number "1".
[0051]
At this time, after performing display and sound field correction in the order of f special data of
channel number "2" and f special data stored in LP memory 22 for 10 seconds, display for 10 sec
of channel number "3" and sound field Although correction is performed, since f special data
stored in the LP memory 22 is also f special data of the channel number "3", setting of the f
special curve based on the data of the channel number "3" and I will display it.
[0052]
In such a case, therefore, the channel number "3" is skipped and the channel number "4" f special
data is changed and displayed. Therefore, immediately before the scan key 16b is input, that is,
the channel number "3" The user does not feel uncomfortable by preventing continuous
correction of the sound field of the sound signal based on the f's special data.
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Furthermore, it is possible to prevent the situation where the sound field characteristic of the
channel number "3" is displayed continuously on the screen immediately before the scan key 16b
is input.
[0053]
In addition, f special data stored in the preset memory 21 is sequentially read at predetermined
time (10 seconds) intervals with the f special data stored in the LP memory 22 interposed
therebetween, and based on the read f special data The setting of the sound field characteristic of
the sound field control circuit 12 is changed, and the sound signal from the sound device 11 is
output as voice based on the set f characteristic data.
[0054]
In addition, while the desired f special data is being set during the scan sound field characteristic
setting process, if the input operation of the scan key 16b is performed again, the scan sound
field characteristic setting process is ended at that point, The setting state at the time is
maintained.
[0055]
Further, the beep sound notifying that the sound field characteristic has been changed by the
beep sound generation circuit 13 can be set in the preset memory 21 when f characteristic data
stored in the LP memory 22 as a comparison reference is set. By changing the sound form of the
beep sound when the stored f special data is set, that is, when the f special data as the
comparison reference is set, pip , f special of the preset memory 21 When data is set, it is
possible to make it easy for the user to recognize the f sound data based on which f characteristic
data is set, by changing it like "pip". Can.
[0056]
Therefore, according to this scan sound field characteristic setting process, when the scan key
16b is turned on, the f characteristic data stored in the preset memory 21 are sequentially read
out based on the f characteristic data immediately before the scan key is turned on, Since sound
field correction is alternately applied to the acoustic signal obtained from the audio device 11
based on f special data immediately before the scan key 16 b ON and f special data read out
sequentially, it is set immediately before the scan key 16 b ON It is easy to recognize how much
each f-special data stored in the preset memory 21 has changed with respect to f-special data as
a reference characteristic, and a desired f-special curve can be obtained by a simple operation. .
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[0057]
Further, according to the scan sound field characteristic setting process in the equalizer device,
as shown in FIG. 6, the f characteristic data stored in the preset memory 21 is sequentially read
out on the display 14 during the scan sound field characteristic setting process. And f special
data stored in the LP memory 221 are alternately read out, and sound field correction is
performed based on the read f special data. However, as shown in FIG. An original sound signal,
that is, an input signal not subjected to sound field control processing may be used as a
comparison reference.
[0058]
In this case, in order to be able to compare the f-special curve based on each f-special data stored
in the preset memory 21 with the flat f-special curve, each f-special data has any features. The
user can recognize more clearly.
[0059]
Further, in the above-mentioned equalizer apparatus, the f-characteristic curve based on the fcharacteristic data stored in the preset memory 21 and the f-characteristic curve based on the fcharacteristic data stored in the LP memory 22 are alternately displayed. However, in order to
make it easy to understand the change of each f special curve, for example, as shown in FIG. 8,
the f special curve stored in the LP memory 22 is always displayed with the comparison
reference curve (shaded in the figure) The comparison curve may be displayed superimposed on
the comparison reference curve by an f-curve (thick line in the figure) corresponding to the fspecial data read out sequentially.
[0060]
In the above embodiment, the sound field characteristic control device has been described as
applied to the equalizer device, but a DSP that artificially creates various acoustic spaces by
controlling frequency characteristics, delay time characteristics, etc. It is applicable.
[0061]
Here, the case where the sound field characteristic control device is applied to a DSP will be
described.
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Also in the case of the DSP, although the internal configuration of the sound field control circuit
12 is slightly different, its constituent blocks and processing operations are substantially the
same as those of the above-mentioned equalizer device, and the description thereof will be
omitted.
FIG. 9 is a memory map showing an example of memory contents of the preset memory 21 in the
DSP.
[0062]
In FIG. 9, the preset memory 21 stores acoustic characteristic data corresponding to the channel
number of each channel key 16a. For example, channel number "1" is HALL, channel number "2"
is a church (CHURCH) ), Channel number "3" to stadium (STUDIUM), channel number "4" to live
house (LIVE HOUSE), channel number "5" to disco (DISCO), channel number "6" to jazz club
(JAZZ CLUB) Acoustic characteristic data for simulating the acoustic space is stored.
[0063]
Also in this DSP, according to the input of the channel key 16a, the acoustic characteristic data of
the channel number corresponding to the input channel key 16a is read out.
[0064]
According to the scan sound field characteristic setting process in this DSP, for example, when
music is listened to by the sound characteristic of the stadium of channel number "3", when the
scan key 16b is turned on, as shown in FIG. After display and sound field correction are
performed for 10 seconds based on the acoustic characteristic data of the live house numbered
"4," display and sound field correction are performed for 10 seconds based on the acoustic
property data of the stadium stored in the LP memory 22.
Thereafter, display and sound field correction are further performed for 10 seconds based on
disco acoustic characteristic data of channel number "5", and then the acoustic characteristic
data of the stadium stored in the LP memory 22 and jazz club of channel number "6" The display
and sound field correction are performed for each of 10 seconds in the order of the acoustic
characteristic data, the stadium acoustic characteristic data of the LP memory 22, and the
acoustic characteristic data of the hole of the channel number "1".
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[0065]
At this time, after displaying and setting the sound field for 10 seconds in the order of the
acoustic characteristic data of the channel number "2" and the acoustic characteristic data of the
stadium stored in the LP memory 22, the 10 seconds of the channel number "3" are displayed
And acoustic field correction is performed, but since the acoustic characteristic data stored in the
LP memory 22 is also acoustic characteristic data of the channel number "3", the acoustic
characteristics of the channel number "3" on the display 14 are continuously Display and sound
field correction for 10 seconds in data.
[0066]
Therefore, in such a case, as in the equalizer device, the channel number "3" is skipped to
perform display and sound field correction for 10 seconds in the acoustic characteristic data of
the channel number "4". By preventing the situation where the sound field correction of the
acoustic signal is continuously performed immediately before the 16b input, that is, based on the
acoustic characteristic data of the channel number "3", the user does not feel uncomfortable.
Furthermore, it is possible to prevent the situation where the sound field characteristic of the
channel number "3" is continuously displayed on the screen immediately before the scan key 16b
is input.
[0067]
Further, the acoustic characteristic data stored in the preset memory 21 is sequentially read at
predetermined time (10 seconds) intervals with the acoustic characteristic data stored in the LP
memory 22 interposed therebetween, based on the read acoustic characteristic data. The setting
of the sound field characteristic of the sound field control circuit 12 is changed, and the acoustic
signal from the acoustic device 11 is corrected based on the set acoustic characteristic data and
output.
[0068]
In addition, while the desired f special data is being set during the scan sound field characteristic
setting process, if the input operation of the scan key 16b is performed again, the scan sound
field characteristic setting process is ended at that point, The setting state at the time is
maintained.
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[0069]
Therefore, according to this scan sound field characteristic setting process, when the scan key
16b is turned on, the acoustic characteristic data stored in the preset memory 21 are
sequentially read out based on the acoustic characteristic data immediately before the scan key
16b is turned on, Acoustic characteristic data immediately before ON of the scan key 16b and
acoustic characteristic data sequentially read out are alternately read out, and sound field
correction is added to the acoustic signal obtained from the acoustic device 11 based on the read
acoustic characteristic data. Therefore, since each acoustic characteristic data stored in the
preset memory 21 can be compared with the acoustic characteristic data stored in the LP
memory 22, the user can easily recognize each characteristic and can perform a desired
operation with a simple operation. The acoustic characteristic data of can be retrieved.
[0070]
Further, in the DSP, as shown in FIG. 11, the acoustic characteristic data sequentially read out in
the preset memory 21 and the acoustic characteristics stored in the LP memory 22 are displayed
on the display 14 during the scan sound field characteristic setting process. Although the
characteristic data is alternately displayed sequentially, the display 14 is divided into two display
areas, and in the lower display area, for example, acoustic characteristic data serving as a
reference, that is, stored in the LP memory 22 (Stadium) is displayed, the acoustic characteristic
data (live house) sequentially read out from the preset memory 21 is displayed in the upper
display area, and the display of the acoustic space name under setting is blinked. Makes it easy to
visually determine what acoustic characteristics are compared.
[0071]
According to the sound field characteristic control apparatus of the present invention configured
as described above, each sound field characteristic data stored in the sound field characteristic
data storage means and immediately before the input according to the input of the scan key. The
sound field characteristic data stored in the data storage means are alternately read out, and the
sound field correction means is made to correct the sound signal based on the read sound field
characteristic data, so that the sound field can be corrected. Each sound field characteristic
corresponding to each channel key stored in the characteristic data storage means is compared
with the sound field characteristic immediately before the scan key input, and while the sound
field characteristics are surely recognized, the desired by simple operation Sound field
characteristics can be easily obtained.
[0072]
Further, according to the sound field characteristic control device of claim 2 of the present
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17
invention, in the sound field characteristic data stored in the sound field characteristic data
storage means, the sound field characteristic data stored in the immediately preceding data
storage means If there is the same sound field characteristic data, reading out from the sound
field characteristic data storage means related to the same sound field characteristic data is
prohibited, and the sound field characteristic data other than the same sound field characteristic
data is read out Therefore, the user does not feel uncomfortable by preventing the sound field
correction of the sound signal based on the sound field characteristic immediately before the
scan key being continuously performed.
[0073]
Brief description of the drawings
[0074]
1 is a block diagram showing a schematic configuration inside the sound field characteristic
control device showing an embodiment of the present invention.
[0075]
2 is a block diagram showing a schematic configuration inside the microcomputer of the sound
field characteristic control device in the present embodiment.
[0076]
3 is a memory map showing memory contents related to the preset memory and the last position
memory in the microcomputer when the sound field characteristic control device of the present
embodiment is applied to an equalizer device.
[0077]
4 is a flowchart showing the processing operation of the microcomputer in the channel sound
field characteristic setting processing of the equalizer device in the present embodiment.
[0078]
5 is a flowchart showing the processing operation of the microcomputer in the scan sound field
characteristic setting process of the equalizer device in the present embodiment.
[0079]
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6 is an operation explanatory diagram showing the display operation of the display in the scan
sound field characteristic setting process of the equalizer device in the present embodiment.
[0080]
7 is an operation explanatory diagram showing the display operation of the display in the scan
sound field characteristic setting process of the equalizer device in another embodiment.
[0081]
8 is a front view of the equalizer device in another embodiment.
[0082]
9 is a memory map showing the memory contents related to the preset memory in the
microcomputer when the sound field characteristic control device according to the present
embodiment is applied to a DSP.
[0083]
10 is an operation explanatory diagram showing the display operation of the display in the scan
sound field characteristic setting process of the DSP in the present embodiment.
[0084]
11 is a front view of a DSP in another embodiment.
[0085]
12 is an operation explanatory view showing the display operation of the display in the equalizer
device of the preset scan method as a conventional sound field characteristic control device.
[0086]
Explanation of sign
[0087]
DESCRIPTION OF SYMBOLS 10 sound field characteristic control apparatus 12 sound field
control circuit (sound field correction means) 14 display (display means) 16a preset channel key
(channel key) 16b preset scan key (scan key) 17 microcomputer (control means, judgment
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means) 21 preset Memory (sound field characteristic data storage means) 22 Last position
memory (LP memory; data storage means immediately before input)
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