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DESCRIPTION JP2010081485

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DESCRIPTION JP2010081485
The present invention provides a signal processing apparatus capable of correctly restoring
settings even when the connection form of audio equipment changes between storage and
readout. An audio device connected to an input terminal 20 generates an audio signal on which
its identification information is superimposed. The scene memory 13 stores scene data including
correspondence information between the plurality of input channel modules 23 and the plurality
of audio devices. The identification information detection unit 12 extracts identification
information from the audio signal input from each input terminal 20. The control unit 10
searches scene data with this identification information, and connects each input terminal 20 to
each input channel module 23. [Selected figure] Figure 1
Signal processing apparatus and signal processing system
[0001]
The present invention relates to a signal processing device that facilitates the connection of an
audio cable in a PA (Public Address) system or the like.
[0002]
There is a mixer as a main device of audio equipment for PA.
The mixer is a device that inputs a plurality of audio signals input from a plurality of input
terminals to signal processing units of different channels, performs level adjustment and
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1
equalization for each channel, and mixes the signals. In general, the mixer is provided with a
scene memory function for storing signal processing settings of each channel set in the past (for
example, see Non-Patent Document 1). Internet,
<http://www2.yamaha.co.jp/manual/pdf/pa/japan/mixers/ls9_ja_om_d0.pdf>, “(Digital Mixer)
LS9 Instruction Manual”, Yamaha Corporation, 2006, Search Date September 24, 2008
[0003]
However, the conventional scene memory function only stores the settings set for each channel.
Therefore, even if the previous settings stored in the scene memory are read out, the settings can
not be correctly restored unless the same audio equipment as that at the time of storage is
connected to the input terminal of each channel.
[0004]
Also, when an audio device breaks down, an alternative audio device may be connected to
another channel, but of course the setting could not be restored correctly.
[0005]
In view of the above, it is an object of the present invention to provide a signal processing
apparatus capable of correctly restoring the setting even when the connection form of the audio
device is different between storing and reading.
[0006]
The signal processing apparatus according to the present invention includes a plurality of input
terminals to which a plurality of audio devices are respectively connected, and a plurality of
signal processing units for performing signal processing.
The audio device outputs an audio signal on which its identification information is superimposed.
The signal processing device includes a storage unit that stores the signal processing information
set by the plurality of signal processing units and identification information of the plurality of
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acoustic devices in association with each other. In addition, the identification information is
extracted from each audio signal to be input, and an identification information detection unit that
detects an audio device connected to each input terminal based on the identification information
is provided. Furthermore, each audio device connected to the plurality of input terminals is
connected to the signal processing unit associated with the storage unit based on the detection
result of the identification information detection unit, and A control unit (patch bay unit)
connecting each signal processing unit is provided. This makes it possible to properly connect
the audio device and the signal processing unit regardless of how the plurality of audio devices
are connected to the plurality of input terminals.
[0007]
Further, when the identification information extracted from the input audio signal does not
completely match the identification information stored in the storage unit, the control unit
substitutes a signal based on the extracted identification information. The processing unit is
searched, and the retrieved alternative signal processing unit and the input terminal are
connected. That is, even if the various information (serial number, manufacturer ID, etc.) included
in the identification information do not completely match, the identification information in which
the various information matches even in part is searched and connected to the associated signal
processing unit Thus, even when an alternative device is connected, the audio device and the
signal processing unit can be correctly connected.
[0008]
If the information included in the identification information contains a unique number (such as a
serial number), other information is stored in an external server, and the external server is
accessed to access each input terminal. The connected audio device may be detected. Also in this
case, even if an alternative audio device is connected, the audio device and the signal processing
unit can be correctly connected.
[0009]
According to the present invention, the setting can be correctly restored even when the
connection form of the audio device changes between storing and reading the scene memory.
[0010]
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An audio mixer which is an embodiment of a signal processing apparatus of the present
invention will be described with reference to the drawings.
[0011]
The audio mixer 1 is a device which receives a plurality of audio signals (audio signals), performs
equalization, amplification and the like on each audio signal, and mixes and outputs the audio
signals to one or more output channels.
In the present embodiment, a mixer which performs signal processing by inputting audio signals
of eight channels will be described.
The number of channels is not limited to eight.
[0012]
The audio mixer 1 includes a control unit 10, a signal processing unit 11, an identification
information detection unit 12, a scene memory 13, an operation unit 14, a plurality of display
units 15-1 to 15-8, and a plurality of analog input terminals 20-1 20-8 and a plurality of A / D
converters 21-1 to 21-8. The signal processing unit 11 is configured by one or more DSPs, and
includes a patch bay 22, a plurality of input channel modules 23-1 to 23-8, a bus group 24, and
an output channel processing unit 25. Here, the input channel module corresponds to the signal
processing unit of the present invention.
[0013]
A / D converters 21-1 to 21-8 are connected to the input terminals 20-1 to 20-8. The A / D
converters 21-1 to 21-8 convert analog audio signals input from the input terminals 20-1 to 208 into digital audio signals. When the input terminal is a digital input, the A / D converter is
omitted. Also, the input channel modules 23-1 to 23-8 have the configuration as shown in FIG. 2,
equalize and amplify the input digital audio signal, and output it to the designated bus.
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[0014]
The patch bay 22 is a circuit that connects each of the input terminals 20-1 to 20-8 (A / D
converters 21-1 to 21-8) to any one of the input channel modules 23-1 to 23-8. It is a
department. The patch bay 22 is, in an initial setting, a straight connection for connecting the
input terminals 20-1 to 20-8 to the input channel modules 23-1 to 23-8, respectively. The
control unit 10 switches and controls which input terminal (audio equipment) is connected to
which input channel module.
[0015]
Each of the input channel modules 23-1 to 23-8 has a head amplifier 30, an equalizer 31, a fader
32, and a bus selection unit 33, as shown in FIG. The bus selection unit 33 includes a PAN
control that controls the output ratio to the L / R stereo bus. The gain of the head amplifier 30,
the equalizing setting of the equalizer 31, the level setting of the fader 32, and the selection /
setting of the bus selection unit 33 are input by the operation of the operation unit 14 by the
operator, and are set in the input channel module 23 by the control unit 10. Ru.
[0016]
The bus group 24 includes a plurality of buses including the above-described stereo bus and a
plurality of mix buses. The bus is an input / output buffer that can input a plurality of audio
signals and can add and combine them.
[0017]
The output channel processing unit 25 is a circuit unit that externally outputs the audio signal of
each bus of the bus group 24 or reinputs it to another bus. The audio mixer can output a
plurality of audio signals in various mixing modes by selecting a bus to which the signal of the
input channel module 23 is input and selecting which bus signal to output externally.
[0018]
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Here, the audio equipment connected to the audio mixer superimposes its identification
information as audio watermark information on the audio signal and outputs it. The audio
equipment is, for example, an instrument or a vocal microphone.
[0019]
Although any scheme may be used to superimpose identification information, for example,
spread spectrum with little influence on hearing is used. Further, although it is desirable from the
viewpoint of hearing that a frequency band on which watermark information is superimposed is
an inaudible frequency band, a band below the Nyquist frequency of the A / D converter 21 is
used.
[0020]
FIG. 3 shows an example of identification information superimposed on an audio signal. The
identification information 100 includes a device group ID 101, a maker ID 102, a model ID 103,
and a serial number 104. The device group ID 101 is text information indicating what kind of
audio device the audio source is, and is identification information in the broadest category. If the
device group IDs are the same, it can be determined that the devices are in the same category.
For example, the device group ID 101 is a microphone if it is Mic, a guitar if it is Guitar, a drum if
it is Drum, etc. The device group ID 101 is not limited to text information, and may be a number
or the like. For example, if the device group ID is 001, it is a microphone, if 002, it is a guitar or
the like.
[0021]
The maker ID 102 is information for identifying the manufacturer or marketer of the device, and
devices having the same maker ID 102 can be determined to be the same manufacturer or
marketer. The model ID 103 includes information on a model of each maker. For example, if the
model ID 103 is GT-1, it is a Stratocaster of an electric guitar, if it is GT-2, it is a Les Paul etc. In
addition, even if model ID103 is the same, when maker ID102 differs, it can be judged that it is
another product. The serial number 104 is information unique to each device (information for
identifying an individual). The serial number 104 may be any information for identifying an
individual, and may be, for example, a MAC address or the like. If the maker ID 102 and the
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model ID 103 are different even though the serial number 104 is the same, it can be determined
that the product is another product.
[0022]
The identification information detection unit 12 extracts and reads identification information
superimposed on audio signals input from the input terminals 20-1 to 20-8, and inputs the
identification information to the control unit 10. Further, the identification information detection
unit 12 reads identification information of each audio signal between the input terminal 20 and
the patch bay 22, and reads identification information of each audio signal between the patch
bay 22 and the input channel module 23. . The control unit 10 performs patching of the patch
bay 22 by comparing the identification information extracted between the input terminal 20 and
the patch bay 22 with the identification information extracted between the patch bay 22 and
each input channel module 23. The pattern (connection information) can be known.
[0023]
Further, the control unit 10 is connected to a scene memory 13 which is a storage unit of the
present invention, an operation unit 14 and display units 15-1 to 15-8. The operation unit 14 is a
functional unit that receives an operation of a fader or the like by the operator. The display units
15-1 to 15-8 display audio source names (for example, device group IDs) of audio signals input
to the input channel modules 23-1 to 23-8.
[0024]
The scene memory 13 is a memory for storing scene data created by the operator. Here, the
scene data is data indicating various setting contents of the signal processing unit 11,
identification information included in each audio signal, and connection information of the patch
bay 22. Various setting contents of the signal processing unit 11 include the gain of the head
amplifier 30 of the input channel module 23-1 to the input channel module 23-8, the equalizing
setting of the equalizer 31, the level setting of the fader 32, the selection information of the bus,
the send level, etc. It consists of
[0025]
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The operator of the audio mixer 1 operates the operation unit 14 to set variously the input
channel module 23 and the like of the signal processing unit 11. Then, when the operator
performs a save operation using the operation unit 14, the setting contents of the signal
processing unit 11 at that time are stored in the scene memory 13 as scene data. At this time, the
identification information of the audio signal input to each of the input channel modules 23-1 to
23-8 read by the identification information detection unit 12 is audio connected to each of the
input channel modules 23-1 to 23-8. It is stored as source identification information.
[0026]
FIG. 4 shows an example of saving scene data. In the figure, microphones 51 to 55 are connected
to input terminals 20-1 to 20-5, guitar 56 and guitar 57 are connected to input terminals 20-6
and 20-7, and drum (electronic drum) 58 is connected to input terminal 20-8. An example is
shown. In the figure, the patching pattern of the patch bay 22 is a straight connection of an
initial setting.
[0027]
The identification information detection unit 12 has input terminals 20-1 to 20-8 (inputs CH1 to
CH8). The identification information superimposed on the audio signal input from ()) is extracted
and read and input to the control unit 10. From the audio signal of the input CH1, (Mic,
YAMAHA, MC-1, 100) is extracted as (device group ID, maker ID, model ID, serial number). (Mic,
YAMAHA, MC-1, 101) is extracted from the audio signal of the input CH2. (Mic, YAMAHA, MC-2,
100) is extracted from the audio signal of the input CH3. (Mic, YAMAHA, MC-3, 200) is extracted
from the audio signal of the input CH4. (Mic, company B, MM-1, 100) is extracted from the audio
signal of the input CH5. (Guitar, YAMAHA, GT-1, 100) is extracted from the audio signal of the
input CH6. (Guitar, YAMAHA, GT-2, 200) is extracted from the audio signal of the input CH7.
(Drum, YAMAHA, DR-1, 500) is extracted from the audio signal of the input CH8.
[0028]
When the operator performs a storage operation using the operation unit 14, the control unit 10
sets the extracted identification information as the input channel modules 23-1 to 23-8 (modules
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CH1 to 8). ) And stored in the scene memory 13. In addition, the signal processing parameters of
each input channel module at that time are also stored. Further, connection information of the
patch bay 22 is also stored in the scene memory 13.
[0029]
On the other hand, when the operator performs a read operation using the operation unit 14, the
control unit 10 reads scene data from the scene memory 13 and sets the signal processing unit
11. A plurality of (for example, 300) scene data can be stored in the scene memory 13, and the
operator may specify a scene number at the time of readout.
[0030]
The signal processing unit 11 is a signal such as the gain of the head amplifier 30 of each input
channel module 23-1 to 23-8, the setting of the equalizer 31, the level setting of the fader 32,
and the bus selection information / send level according to the scene data. Set processing
parameters.
[0031]
Further, the control unit 10 inputs identification information read from the audio signals input
from the input terminals 20-1 to 8 by the identification information detection unit 12, and is
associated with each module CH1 to 8 in the scene data. The patching pattern of the patch bay
22 is set in contrast to the existing identification information.
First, the control unit 10 sets a patching pattern so as to connect channels whose identification
information completely matches. Thereafter, a channel in which the device group 101, the maker
ID 102, and the model ID 103 match is searched, and a patching pattern is set. Then, a channel
in which the device group 101 and the maker ID 102 match is searched, and a patching pattern
is set. Finally, a channel in which only the device group 101 matches is searched, and a patching
pattern is set.
[0032]
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As a result, even when the devices connected to the input terminals 20-1 to 20-8 are replaced at
the time of saving and reading of scene data, the audio signal of the same device as at the time of
saving is input to the same input channel module 23. It is possible to input, and the setting can
be easily restored without the operator confirming the connection state. In addition, even if a
different device from the one at the time of storing scene data is connected due to a device
failure or the like and another audio device being connected to another channel, etc. By
connecting, it is also possible to restore the settings as if the alternative device was connected.
[0033]
Hereinafter, restoration when a substitute device is connected will be specifically described. FIGS.
5-9 is a figure which shows the relationship of the connection form of the audio equipment at the
time of readout of scene data, the patching pattern of the patch bay 22, and identification
information.
[0034]
In FIG. 5, microphone 61 is connected to input CH1, microphone 62 to input CH2, microphone
51 to input CH3, guitar 56 to input CH4, microphone 63 to input CH5, microphone 64 to input
CH6, and drum 58 to input CH8. Show an example. Nothing is connected to input CH7.
[0035]
The identification information detection unit 12 extracts and reads identification information
superimposed on audio signals input from the inputs CH1 to CH8, and inputs the identification
information to the control unit 10. From the audio signal of the input CH1, (Mic, YAMAHA, MC-2,
200) is extracted as (device group ID, maker ID, model ID, serial number). (Mic, YAMAHA, MC-1,
102) is extracted from the audio signal of the input CH2. (Mic, YAMAHA, MC-1, 100) is extracted
from the audio signal of the input CH3. (Guitar, YAMAHA, GT-1, 100) is extracted from the audio
signal of the input CH4. (Mic, YAMAHA, MC-4, 200) is extracted from the audio signal of the
input CH5. (Mic, C company, MI-10, 300) is extracted from the audio signal of input CH6.
Identification information is not extracted from the audio signal of the input CH7. (Drum,
YAMAHA, DR-1, 500) is extracted from the audio signal of the input CH8.
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[0036]
When the operator performs a read operation using the operation unit 14, the control unit 10
reads scene data from the scene memory 13 and compares identification information. The
comparison of the identification information is performed, for example, from the smaller channel
number. First, as shown in FIG. 5, the control unit 10 sets a patching pattern so as to connect
channels whose identification information completely matches. That is, first, since the
identification information extracted from the audio signal of the input CH3 completely matches
the module CH1 of the scene data, the input terminal 20-3 and the input channel module 23-1
are connected. Next, since the identification information extracted from the audio signal of the
input CH4 completely matches the module CH6 of the scene data, the input terminal 20-4 and
the input channel module 23-6 are connected. Further, since the identification information
extracted from the audio signal of the input CH8 completely matches the module CH8 of the
scene data, the input terminal 20-8 and the input channel module 23-8 are connected. Therefore,
audio signals of the same device as at the time of storage can be input to the same input channel
module 23.
[0037]
Next, as shown in FIG. 6, the control unit 10 searches for a channel having the same device group
101, maker ID 102, and model ID 103 except for the serial number 104, and sets a patching
pattern. That is, since the device group 101 of the identification information extracted from the
audio signal of the input CH1, the maker ID 102, and the model ID 103 match the module CH3 of
the scene data, the input terminal 20-1 and the input channel module 23-3 are connected.
Further, since the device group 101 of the identification information extracted from the audio
signal of the input CH2, the maker ID 102, and the model ID 103 match the module CH2 of the
scene data, the input terminal 20-2 and the input channel module 23-2 are connected. In this
case, although the serial numbers are different, since the other IDs match, it is possible to restore
the setting assuming that the alternative device is connected as the same model of the same
maker.
[0038]
Next, as shown in FIG. 7, the control unit 10 further searches for a channel in which the device
group 101 and the maker ID 102 match except for the model ID 103, and sets a patching
pattern. That is, since the device group 101 and the maker ID 102 of the identification
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information extracted from the audio signal of the input CH5 match the module CH4 of the scene
data, the input terminal 20-5 and the input channel module 23-4 are connected. In this case,
although the model is different, since the type of the device and the manufacturer match, the
setting can be restored assuming that the alternative device is connected.
[0039]
Further, as shown in FIG. 8, the control unit 10 further searches for a channel in which the device
group 101 matches except the maker ID 102, and sets a patching pattern. That is, since the
device group 101 of the identification information extracted from the audio signal of the input
CH6 matches the module CH5 of the scene data, the input terminal 20-6 and the input channel
module 23-5 are connected. In this case, although the models and the manufacturers are
different, since the types of the devices match, the setting can be restored assuming that the
alternative device is connected.
[0040]
Finally, as shown in FIG. 9, the control unit 10 maintains the patching pattern as it is for the
input CH in which none of the IDs match. That is, since identification information is not extracted
from the input CH7 and there is no channel whose ID matches, it is presumed that there is a
connection error, and the input terminal 20-7 and the input channel module 23-7 are connected
as they are. Note that connection information is also stored in the scene data, and if it is
connected to another input channel module 23 by default, it is connected to one of the input
channel modules 23 of the remaining vacant channels. You may At this time, a message may be
displayed on the display unit 15 that a matching channel can not be found, and the operator may
manually select the connection channel. Further, also in the connection operation shown in FIGS.
5 to 8, the display unit 15 may display that the connection is to be switched.
[0041]
In the search operation shown in FIGS. 5 to 8, in the case where there are a plurality of
alternative channels, channels having the same input terminal may be preferentially connected,
and the number may be smaller. The connection may be made in order of priority, or the display
unit 15 may be displayed to indicate that a plurality of candidates exist, and the operator may
make a selection.
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[0042]
Further, after the connection shown in FIG. 9 is performed, the scene data in the scene memory
13 may be rewritten in the connection mode.
Also in this case, the display unit 15 may display that the scene memory is to be rewritten, and
the operator may select.
[0043]
In the above example, the control unit 10 reads the scene data when the operator performs a
read operation using the operation unit 14. However, for example, when the audio mixer is
activated or when the connection of the device is changed The patch bay may be switched by
comparing the setting of and the identification information of the connected device.
[0044]
Furthermore, in the above embodiment, the identification information includes the device group
ID 101, the maker ID 102, the model ID 103, and the serial number 104, and the configuration
for storing all of them in the scene memory 13 is shown. The scene memory 13 may store
information indicating the correspondence between the serial number 104 and the module CH.
However, in this case, the serial number 104 is a completely unique ID that is not duplicated in
each audio device. In this case, a database indicating the correspondence between the serial
number 104 and other information (device group ID 101, maker ID 102, model ID 103, serial
number 104) is prepared for an external server or the like. The audio mixer accesses the server
via the network, transmits the serial number 104 included in the identification information to
obtain the device group ID 101, the maker ID 102, the model ID 103, and the serial number 104,
and performs the search operation.
[0045]
Also, in the present embodiment, an example is shown in which the device group ID,
manufacturer ID, model ID, and serial number ID are searched in the priority order as a rule for
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selecting an alternative device. The ID may be divided into a plurality of stages of major
classifications such as microphones and guitars, and small classifications such as condenser
microphones and dynamic microphones. In addition, the operator may be allowed to change the
priority rule for searching for an alternative device.
[0046]
In the above embodiment, the audio equipment connected to each of the input channel modules
23-1 to 23-8 controls the patching pattern so as to match the contents of the scene data, but the
patch bay 22 is the default. The settings of the input channel modules 23-1 to 23-8 may be
exchanged so as to match the audio devices connected to the input terminals 20-1 to 20-8 while
keeping the straight connection.
[0047]
That is, when the scene data is stored in the setting of FIG. 4 and the scene data is read out, as
shown in FIG. 10, the input channel module 23 is connected as shown in FIG. The setting of -1
and the setting of the input channel module 23-3 are interchanged.
The setting of the input channel module 23-4 is set to the input channel module 23-6, the setting
of the input channel module 23-5 is set to the input channel module 23-4, and the setting of the
input channel module 23-6 is input. The channel module 23-5 is set.
[0048]
This makes it possible to restore the default straight connection if the patching pattern of the
patch bay 22 becomes complicated. Further, even in the case of an audio mixer without the patch
bay 22, it is possible to automatically associate the audio source with the setting of the input
channel module.
[0049]
Although the above embodiment has been described by taking the audio mixer as an example,
the scope of application of the present invention is not limited to the audio mixer. The present
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invention can be applied to a PA system in which a plurality of devices such as an audio mixer, a
patch bay, an effector, and an input connector box are combined.
[0050]
Further, the identification information may be removed from the audio signal in the audio mixer.
[0051]
It is a block diagram of the audio mixer which is an embodiment of this invention.
It is a block diagram of the input channel module of the audio mixer. It is a figure which shows
the example of the identification information superimposed on the audio signal input into the
same audio mixer. It is a figure which shows the connection form of the audio source at the time
of preservation | save of scene data. It is a figure which shows the relationship of the connection
form of audio equipment at the time of readout of scene data, the patching pattern of patch bay
22, and identification information. It is a figure which shows the relationship of the connection
form of audio equipment at the time of readout of scene data, the patching pattern of patch bay
22, and identification information. It is a figure which shows the relationship of the connection
form of audio equipment at the time of readout of scene data, the patching pattern of patch bay
22, and identification information. It is a figure which shows the relationship of the connection
form of audio equipment at the time of readout of scene data, the patching pattern of patch bay
22, and identification information. It is a figure which shows the relationship of the connection
form of audio equipment at the time of readout of scene data, the patching pattern of patch bay
22, and identification information. Figure showing an example of resetting the correspondence
between input terminals and input channel modules
Explanation of sign
[0052]
DESCRIPTION OF SYMBOLS 1 Audio mixer 10 Control part 11 Signal processing part 12
Identification information detection part 13 Scene memory 20-1 to 20-8 Input terminal 22 Patch
bay 23-1 to 23-4 Input channel module
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