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DESCRIPTION JP2005323121

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DESCRIPTION JP2005323121
PROBLEM TO BE SOLVED: When performing crossfading by remote control of a digital mixer, it
is possible to cancel crossfading for some channels, and to distinguish between faded in channels
and faded out channels on the operation panel I did it. SOLUTION: When a crossfade is
commanded by an external control device, an electric fader 524 is automatically driven. Here,
when the operator manually operates the electric fader 524, the CPU detects this fact and the
automatic driving of the electric fader 524 is stopped. In addition, whether the electric fader 524
fades in or fades out is distinguished by the lighting color of the LED inside the SEL key 516. In
addition, when the SEL key 516 is pressed in the middle of the cross fade, the motorized fader
524 is stopped in the state returned to the position before the cross fade execution. [Selected
figure] Figure 3
Control method of volume control device, volume control device and program
[0001]
The present invention relates to a control method, a volume control device, and a program of a
volume control device suitable for use in producing video and audio content.
[0002]
When producing video and audio content, for example, a plurality of VTRs for reproducing video
/ audio signals as material or recording completed content, a digital mixer for mixing audio
signals, a video switcher for switching video signals, etc. It is necessary to operate the equipment
of
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Since it is very complicated for the operator to operate these devices individually, there is known
a technique using a control device for remotely controlling these devices centrally. That is, the
operator can operate other devices mainly by operating only the control device, and can continue
the content production work.
[0003]
Here, when two audio signals to be used as materials are to be switched, in general, a cross fade
is performed in which one audio signal is faded in and the other audio signal is faded out. Also in
the control device described above, the mixer can be instructed to cross fade. That is, when the
operator performs a predetermined operation in the control device, the control device transmits
a command instructing to execute the cross fade to the digital mixer. When this command is
received at the digital mixer, cross fading is performed based on the pre-stored setting
information for cross fading. That is, while the audio signals of one set of input channels are
faded out, the audio signals of the other set of input channels are faded in. At that time, on the
operation panel of the digital mixer, faders corresponding to these channels are automatically
driven in the vertical direction. A digital mixer that can be remotely controlled from the outside
as described above is disclosed, for example, in Non-Patent Document 1.
[0004]
"DM2000 Instruction Manual" Yamaha Corporation, February 2002
[0005]
However, in the above-described technology, when a crossfade is instructed from the control
device side, it is impossible to cancel the crossfade for some channels on the operation panel of
the digital mixer.
In addition, it has not been possible to confirm, in the vicinity of a fader or the like, a channel to
be faded in and a channel to be faded out when cross-fading is performed. The present invention
has been made in view of the above-described circumstances, and it is a first object of the present
invention to provide a control method for a volume control device, a volume control device and a
program capable of stopping crossfading for some channels in the middle of crossfade The
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purpose is. In addition, it is a second object of the present invention to make it possible to easily
confirm various aspects of cross fading in these.
[0006]
In order to solve the above problems, the present invention is characterized by comprising the
following configuration. In addition, the inside of a parenthesis is an illustration. In the control
method of the sound volume adjustment device according to claim 1, the first and second sound
signals (the first sound signal is a signal corresponding to each operation amount of the first and
second sound volume operators (faders) Each of the first to fourth input channels, the second
audio signal adjusts the level of any one of the fifth to eighth input channels), and the first and
second audio Operation mode setting means (SEL key) for setting an operation mode (FADER
mode) as to whether or not cross fading is to be performed on the signal, and the operation mode
for each of the first and second audio signals (input channel A control method of a sound volume
adjustment device having storage means (RAM 16) for storing, and performing an ON state or
cross fade for performing cross fade in response to an operation of the operation mode setting
means (SEL key) Storing any one of the operation modes (FADER mode) of the first and second
audio signals in the storage means (RAM 16) (SP104 and SP114); When the operation mode
relating to the audio signal is in the ON state, when the predetermined cross fade execution
command is received, the first audio signal is subjected to one of fade-in and fade-out. When the
cross fade execution command is received when the first cross fade process (SP 64) for
automatically driving the volume control and the operation mode related to the second audio
signal is ON, the second audio is received. A second cross-feet that automatically drives the
second volume control to perform the other of fade-in or fade-out on the signal Step (SP64), and
after the crossfade execution command is received, the first or second crossfade step is
completed by the operation of the operation mode setting means (SEL key). Or an operation
mode change process (SP102, SP104, SP114) for switching the ON / OFF state of the operation
mode for the one audio signal when detecting the change operation of the operation mode for
the one audio signal among the second audio signals The operation amount of the volume
control corresponding to the one audio signal is determined on the condition that the operation
mode corresponding to the one audio signal after the execution of the operation mode changing
process is in the OFF state, An operation amount changing process (SP112) for changing to an
operation amount before the first or second cross fading process is started; If the operation mode
corresponding to the one audio signal after the operation mode change process has been
performed is in the ON state, the first or second cross fade process is performed. Until the
operation is completed, the operation amount of the volume control corresponding to the one
audio signal is not automatically set, and when a new crossfade execution command is received,
the volume control corresponding to the one audio signal is received. The processing device is
caused to execute the first or second cross fading process.
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Further, in the configuration according to claim 2, in the control method of the volume control
device according to claim 1, the storage means (RAM 16) distinguishes between an audio signal
to be faded in and an audio signal to be faded out. A cross fade mode (CROSSFADE mode) is
stored for each of the audio signals, and the volume controller is configured to set the ON / OFF
state of each operation mode (FADER mode) for the first and second audio signals. Informing
means for differentiating the crossfade mode and notifying the operator when the operation
mode is in the ON state are provided corresponding to the first and second volume operators,
respectively. The operation mode and the crossfade mode corresponding to each audio signal
from the storage means (RAM 16). Notification process (SP56, SP86, SP116 to SP120) of reading
out the signal and informing the operation mode and the cross fade mode for each audio signal
through the notification means by the notification method according to the operation mode and
the cross fade mode Furthermore, it is characterized by having. Further, in the configuration
according to the third aspect, in the control method of the sound volume adjusting device
according to the second aspect, the operation mode setting means corresponds to each of the
first and second sound volume operators (faders). , And the notification means are respectively
disposed corresponding to the first and second operators (built-in to each SEL key). The
operation mode changing process (SP102, SP104, SP114) is operated when the first or second
operation element is operated. The method is characterized in that it is a process of changing an
operation mode for an audio signal corresponding to the operation element. In the sound volume
adjustment device according to claim 4, the control method of the sound volume adjustment
device according to any one of claims 1 to 3 is carried out. A program according to a fifth aspect
is characterized in that the processing device is caused to execute the control method of the
sound volume adjustment device according to any one of the first to third aspects.
[0007]
As described above, according to the present invention, by operating the operation mode setting
means and changing the operation mode for a part of the audio signals, it is possible to cancel
the cross fade for the audio signals of some channels. Further, according to the configuration in
which the notification means is provided corresponding to each of the first and second volume
operators and the operation mode and the cross fade mode are notified for each audio signal, the
channel faded out is faded out. A channel can be confirmed in the vicinity of a volume control
such as a fader.
[0008]
1.
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Configuration of Example 1.1. Overall Configuration Next, the configuration of an editing system
to which a digital mixer according to an embodiment of the present invention is applied will be
described with reference to FIG. In the figure, reference numerals 106, 108 and 110 denote
VTRs, and the VTRs 106 and 108 reproduce video / audio signals as material for producing
contents. Also, the VTR 110 records the video / audio signal of the completed content. These
VTRs record and reproduce multitrack audio signals. Reference numeral 104 denotes a video
apparatus, which comprises a video switcher, a video effector, etc., performs processing such as
effect imparting, mixing, and switching on the video signals reproduced from the VTRs 106 and
108, and supplies the resultant video signals to the VTR 110 Do.
[0009]
Reference numeral 112 denotes a digital mixer of this embodiment, which performs effects
processing, level adjustment processing and the like on the audio signals supplied from the VTRs
106 and 108, and supplies the resultant audio signals to the VTR 110. Reference numeral 102
denotes a control device for remotely controlling a plurality of control target devices such as the
video device 104, the VTRs 106, 108, 110, and the digital mixer 112 so as to operate (process)
at the same timing. A command (control command) representing a control content (a process to
be performed by a control target device) is transmitted to each in accordance with a control
timing of each device (a timing at which the process is to be performed). When each control
target device (video device 104, VTRs 106, 108, 110, digital mixer 112, etc.) receives a control
command from the control device 102, it executes a process represented by the control
command. A sound system 114 emits a CUE signal (a signal for monitoring) output from the
digital mixer 112.
[0010]
1.2.
Configuration of Digital Mixer 112 Next, the detailed configuration of the digital mixer 112 will
be described with reference to FIG. In FIG. 2, reference numeral 2 denotes a control signal
interface, which inputs and outputs control signals such as the control command described above
to and from the control device 102. An audio signal interface 4 inputs and outputs audio signals
to and from input / output devices such as the VTRs 106, 108, and 110. A signal processing
circuit 6 is constituted by a group of DSPs (digital signal processors). The signal processing
circuit 6 performs mixing processing and effect processing on the digital audio signal supplied
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via the audio signal interface 4, and outputs the result to the audio signal interface 4.
[0011]
An operator group 10 is composed of faders, volume operators, switches, character input
keyboards, and operators such as a mouse. Reference numeral 12 denotes a display group, which
comprises a flat panel display (such as an LCD display) for displaying various information to the
user, an LED around a volume control, an LED embedded in a switch, a level meter, etc. .
Reference numeral 18 denotes a CPU, which controls each unit via the bus 8 based on a control
program stored in the ROM 14. A RAM 16 is used as a work memory of the CPU 18.
[0012]
Further, in the RAM 16, an area called a current area 16a is secured. In the current area 16a,
values currently set for each of various parameters for signal processing in the signal processing
circuit 6 are stored. For example, fader gain (value for adjusting the volume of the audio signal)
to be added to the audio signal of the input / output channel based on the operation amount of
each fader, parameters of equalization processing of each input / output channel, various
switches The on / off state and the like are stored in the current area 16a. The signal processing
for the audio signal executed by the signal processing circuit 6 is controlled based on the value
stored in the current area 16a.
[0013]
1.3.
Configuration of Main Parts of Operation Panel Next, the configuration of the main parts of the
operation panel (operator group 10) of the digital mixer 112 will be described with reference to
FIG. In the figure, reference numerals 510-1, 510-2,... Denote channel strips, which are provided
corresponding to the respective input channels. Since each channel strip has the same
configuration, the detailed configuration will be described by taking the channel strip 510-1 as
an example.
[0014]
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Inside the channel strip 510-1, 512 is an ON key, which switches the on / off state of the
corresponding input channel. In the inside of the ON key 512, an LED that is turned on / off
according to the on / off state is embedded. A rotary encoder 514 is used for PAN adjustment
and gain adjustment of the input channel. Further, LEDs are annularly arranged around the
rotary encoder 514, and the amount of operation of the rotary encoder 514 is displayed
according to the lighting state. Reference numeral 516 denotes a SEL key, which switches on /
off states of a FADER mode described later. The SEL key 516 incorporates a plurality of LEDs of
different emission colors, and these LEDs are configured to be able to independently set the on /
off state.
[0015]
Reference numeral 518 denotes a display, which displays the channel name of the input channel.
An electric fader 524 includes detection means for detecting a manual operation by the operator,
and when the manual operation is detected by the detection means, an operation amount (level)
operated by the manual operation is detected and detected Adjust the fader gain of the
corresponding input channel according to the level. The operation amount of the rotary encoder
514 and the electric fader 524 can be automatically set based on the command of the CPU 18. A
CUE key 526 switches the on / off state of the CUE of the corresponding input channel. The
audio signal of the input channel in which the CUE is in the ON state is mixed with the CUE
signal. That is, the result of mixing the audio signals of one or more input channels becomes a
CUE signal, which is emitted through the sound system 114.
[0016]
2.
Data Structure of the Embodiment The setting information table 30 shown in FIG. 4 is stored in
the RAM 16 of the digital mixer 112. In the figure, reference numeral 32 denotes a channel
number column representing the number of the input channel in the digital mixer 112, and 34
denotes an input device allocation unit. The input device allocation unit 34 defines which input
channel is assigned to the input audio signals from the plurality of input devices A, B, C,. An input
channel assigned to each input device is indicated by an "X" mark in the figure. It is possible to
assign arbitrary input devices to the input devices A, B, C,..., But here, it is assumed that the VTR
106 as the input device A and the VTR 108 as the input device B are assigned. That is, in the
illustrated example, each of the four input signals input from input device A (VTR 106) is
assigned to each of the first to fourth input channels, and input from input device B (VTR 108).
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Each of the four input signals is assigned to each of the fifth to eighth input channels. The
assignment state in the input device assignment unit 34 is set by the operator using the
operation on the digital mixer 112.
[0017]
Reference numeral 35 denotes a FADER mode designating unit, which designates an "ON" or
"OFF" FADER mode for each input channel. Here, the FADER mode is used to designate whether
or not the inside of the channel strips 510-1, 510-2,... Related to each input channel can be
remotely controlled based on a control command from the control device 102. is there. That is,
when the FADER mode is ON, the faders or the like of the channel can be remotely controlled
based on the control command. When the FADER mode is OFF, the remote control is not
controlled based on the control command. The state of the FADER mode is set by the operator
using an operation (SEL key 516) on the digital mixer 112.
[0018]
Reference numeral 36 denotes a CROSSFADE mode designating unit, which stores a CROSSFADE
mode of "FROM", "TO" or "NONE". Here, "FROM" means to be faded out when performing a
crossfade, "TO" means to be faded in, and "NONE" is not to be subject to fade in / fade out.
means. However, even if the CROSSFADE mode is "NONE", if the FADER mode is "ON", parts other
than the faders in the channel strip are remotely controlled, so for example, the on / off state of
the CUE key 526 is controlled Remote control from the device 102 is possible. The state of the
CROSSFADE mode is set only by the control command received from the control device 102, and
can not be set using the controls on the digital mixer 112.
[0019]
Next, 37 is an AUTO mode designation unit, which designates the "ON" or "OFF" AUTO mode.
Here, the AUTO mode is a mode that defines whether or not the faders related to each input
channel are actually automatically driven in the currently executed crossfade operation, and if
the mode is "ON", the automatic mode is automatic. And “OFF” indicates that it is not
automatically driven. Although the details will be described later, when the cross fade is started,
all the AUTO modes of the input channels whose CROSSSFADE mode is “FROM” or “TO” are
set to the ON state. However, when the operator performs a predetermined operation during
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crossfade execution, the AUTO mode of the corresponding input channel is set to "OFF".
[0020]
Next, reference numeral 38 is a reference level designation unit, which defines the reference
level of the cross fade. Here, the “reference level” is used as the fader gain at the start of the
crossfade when the CROSSFADE mode is “FROM” in the input channel, and when the crossfade
mode is “TO” when the crossfade is in the end Is a value used as a fader gain of
[0021]
3.
Operation of Example 3.1. General Operation of Digital Mixer When the operator group 10 is
operated by the operator, the contents of the operation are detected by the CPU 18, and the
corresponding parameters in the current area 16a are updated. In addition, even when the
operator group 10 is not operated by the operator, the contents of the current area 16a may be
automatically updated by various processes described later. Then, the CPU 18 periodically
executes interrupt processing. In this interrupt processing, the operation amount of each
operation element is compared with the value of the corresponding parameter in the current area
16a. Then, when the two values are different, the operation amounts of the operators are
updated such that the operation amounts of the operators coincide with the values of the
corresponding parameters. As described above, the operation amounts of the operators are
sequentially updated so as to maintain the consistency between the operation amounts of the
operators and the corresponding parameters.
[0022]
For example, since the operation amount of the rotary encoder 514 is expressed by the lighting
state of the surrounding LED, the operation amount can be updated in an instant according to the
value of the parameter in the current area 16a. On the other hand, since the operation amount of
the electric fader 524 is expressed by the physical position of the electric fader 524, the electric
fader 524 is driven to match the value of the parameter (fader gain). Such general operation is
similar to known digital mixers.
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[0023]
3.2.
Here, when the operator performs a predetermined operation, the flat panel display in the
display group 12 displays the contents of the channel number column 32, the input device
allocation unit 34, and the FADER mode specification unit 35. Along with a screen for editing
these. Thus, the operator designates the input channels assigned to the input devices A, B, C,... By
operating the keyboard, mouse, etc. on this screen, and sets the FADER mode for these input
channels. It can be set.
[0024]
Also, the operator can set the fader gain of each input channel to an optimum level by operating
the faders of each input channel while actually reproducing the audio signals from the VTRs 106
and 108 and the like. Thus, after the fader gain is adjusted to the optimum level, when the
operator performs a predetermined operation, the fader gain at that time of each fader is stored
in the reference level designation unit 38 as the reference level at the time of cross fading. Be
done. However, the content of the CROSSFADE mode designation unit 36 is set later when a
control command is supplied from the control device 102, and the content of the AUTO mode
designation unit 37 is set when crossfading is actually performed. At this point in time, the
operator can not edit the contents of these designation parts 36 and 37.
[0025]
3.3.
Setting of the CROSSFADE Mode In order to instruct the digital mixer 112 to execute crossfading
from the control device 102, it is necessary to designate in advance the CROSSFADE mode of the
channel related to the crossfading. The following are defined as control commands supplied from
the control device 102 to the digital mixer 112 in order to execute the designation. (1) FROM
machine command: This command is a command instructing that the CROSSFADE mode of all
input channels assigned to a specific input device should be set to "FROM". (2) FROM channel
command: This command is a command to set the CROSSFADE mode to "FROM" for one or more
arbitrary input channels. (3) TO machine command: This command is a command instructing that
the CROSSFADE mode of all input channels assigned to a specific input device should be set to
"TO". (4) TO channel command: This command is a command to set the CROSSFADE mode to
"TO" for one or more arbitrary input channels.
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[0026]
Hereinafter, the operation in the case where each command is supplied from the control device
102 will be individually described in detail. However, any of the above mentioned commands will
be ignored if a crossfade is received during execution. Therefore, these commands will be
executed and the contents of the CROSSFADE mode will be updated only if a crossfade is not in
progress. A method of determining whether or not "crossfading is in progress" will be described
later.
[0027]
(1)
FROM machine command When the FROM machine command specifying one of the input
devices (A, B, C, ...) is supplied from the control device 102, the CPU 18 receives the FROM
machine command shown in FIG. 5A. The routine is started. In the figure, when the process
proceeds to step SP2, the input device allocation unit 34 in the setting information table 30 is
referred to, and all input channels allocated to the input device specified by the FROM machine
command are searched. Then, the corresponding part of the CROSSFADE mode designation unit
36 is updated so that all the CROSSFADE modes of the retrieved input channel are set to
“FROM”.
[0028]
(2)
FROM channel command When the FROM channel command is supplied from the control device
102, the CPU 18 starts a FROM channel command reception routine shown in FIG. 5B. The FROM
channel command includes, for example, channel designation data 40 as shown in FIG. 5C. The
channel designation data 40 is formed by assigning a 1-bit indication flag to each input channel,
and sets the CROSSFADE mode of the corresponding input channel to "FROM" when the
indication flag is "1", When it is "0", it indicates that "FROM" is not set. Now, in FIG. 5B, when the
process proceeds to step SP12, the corresponding part of the CROSSFADE mode designation unit
36 is updated so that the CROSSFADE mode of all the input channels whose instruction flag is "1"
is set to "FROM". Be done.
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[0029]
Next, when the process proceeds to step SP14, a channel whose present CROSSFADE mode is
"FROM" is detected from among all the input channels whose instruction flag is "0". Next, when
the process proceeds to step SP16, it is determined whether or not at least one channel is
detected in this step SP14. If the determination is "NO" here, the processing of this routine ends
immediately. On the other hand, if "YES", the process proceeds to step SP18, and the CROSSFADE
of the detected input channel (all input channels whose corresponding instruction flag is "0" and
the CROSSFADE mode is "FROM") The corresponding part of the CROSSFADE mode designation
unit 36 is updated so that the mode is set to "NONE".
[0030]
(3)
TO Machine Command When a TO machine command specifying any input device is supplied
from the control device 102, the CPU 18 starts a TO machine command receiving routine shown
in FIG. 6A. In the figure, when the process proceeds to step SP22, the input device allocation unit
34 in the setting information table 30 is referred to, and all input channels allocated to the input
device specified by the TO machine command are searched. Then, the corresponding part of the
CROSSFADE mode designation unit 36 is updated so that all the CROSSFADE modes of the
retrieved input channels are set to "TO".
[0031]
(4)
TO channel command When a TO channel command is supplied from the control device 102, the
CPU 18 starts a TO channel command reception routine shown in FIG. 6 (b). The TO channel
command includes, for example, channel designation data 42 as shown in FIG. 6C. The channel
designation data 42 is formed by assigning a 1-bit designation flag to each input channel, as with
the channel designation data 40 of the above-mentioned FROM channel command. In FIG. 6B,
when the process proceeds to step SP32, the corresponding part of the CROSSFADE mode
designation unit 36 is updated so as to set the CROSSFADE mode of all input channels whose
instruction flag is "1" to "TO". .
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[0032]
Next, when the process proceeds to step SP34, among all the input channels whose instruction
flag is "0", a channel whose current CROSSFADE mode is "TO" is detected. Next, when the process
proceeds to step SP36, it is determined whether or not at least one channel is detected in this
step SP34. If the determination is "NO" here, the processing of this routine ends immediately. On
the other hand, if "YES", the process proceeds to step SP38, and the CROSSSFADE of the detected
input channel (all input channels whose corresponding instruction flag is "0" and the CROSSFADE
mode is "TO") The corresponding part of the CROSSFADE mode designation unit 36 is updated so
that the mode is set to "NONE".
[0033]
3.4.
Reception of Cross Fade Start Command When a cross fade start command is issued from the
control device 102 instructing the digital mixer 112 to start cross fade execution, the CPU 18
determines whether or not cross fade is currently being executed. Is determined. Here, if the
cross fade is being performed, the cross fade start command is ignored. On the other hand, if the
cross fade is not being performed, the cross fade start command reception routine shown in FIG.
7 is started.
[0034]
In FIG. 7, when the process proceeds to step SP42, the setting information table 30 is referred to,
and all input channels in which the FADER mode is “ON” and the CROSSFADE mode is set to
“FROM” or “TO” are detected. , And the number of detected input channels is substituted
into a variable n. Also, here, each detected channel is substituted into the array CH. Therefore,
the elements of the array CH are the channels CH [1] to CH [n]. Furthermore, a count variable k
for counting input channels is set to "1".
[0035]
Next, when the process proceeds to step SP44, it is determined whether the count variable k
exceeds the number of channels n. If the decision is "NO" here, the process proceeds to step
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13
SP46. Here, the reference level of the channel CH [k] is read from the reference level designation
unit 38, and the current area 16a is updated such that the fader gain of the channel CH [k]
becomes equal to the reference level. Next, when the process proceeds to step SP48, it is
determined whether or not the CROSSFADE mode of the channel CH [k] is set to "TO". If “YES”
is determined here, the process proceeds to step SP50, and the current area 16a is updated so
that the fader gain of the channel CH [k] becomes the lowest level “−∞”.
[0036]
After all, the fader gain is set to the reference level if the CROSSFADE mode is "FROM", and is set
to the lowest level "-−" if it is "TO". As a result, the corresponding electric fader 524 is driven
toward the position corresponding to the fader gain, and is automatically moved to the
corresponding position. After this movement is completed, when the process proceeds to step
SP52, the AUTO mode of channel CH [k] is set to "ON". Next, in step SP54, the crossfade timer
interrupt corresponding to the channel CH [k] is permitted.
[0037]
Note that "crossfade timer interrupt" occurs at every predetermined time (crossfade timer
interrupt cycle) during crossfade and for each channel for which interrupt is enabled, and the
fader gain of each input channel is It is an interrupt to change gradually. Since the availability of
this interrupt is set for each channel, here only the interrupt for the channel CH [k] is permitted.
Further, in the cross fade start command supplied from the control device 102, a cross fade
execution time which is a time from the start of the cross fade to the end thereof is designated.
Therefore, when the cross fade execution time is divided by the cross fade timer interrupt cycle,
the number of occurrences of the interrupt within the cross fade execution time can be obtained.
[0038]
Further, in the channel in which the CROSSFADE mode is “FROM”, the fader gain at the start of
the crossfade is at the reference level, and the fader gain at the end of the crossfade is at the
lowest level “−∞”. On the other hand, in the channel in which the CROSSFADE mode is "TO",
the fader gain at the start of the crossfade is the lowest level "-.infin.", And the fader gain at the
end of the crossfade is the reference level. In any case, the amount of change in fader gain in
crossfade timer interrupt per “1” time according to “(fader gain at end of crossfade − fader
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gain before start of crossfade) / number of interrupts)”. You can get In step SP54, this variation
for channel CH [k] is also calculated.
[0039]
Next, when the process proceeds to step SP56, the lighting state of the built-in LED of the SEL
key 516 of the channel CH [k] is changed from the "crossfade stopped" state to the "crossfade in
progress" state. Here, the details of these lighting states will be described with reference to FIG.
First, in the "crossfading stopped" state, the SEL key of the channel for which the FADER mode is
"OFF" is set to the unlit state. In addition, the SEL key of the channel in which the FADER mode is
"ON" is continuously lit by the lighting color according to the CROSSFADE mode. For example,
when the CROSSFADE mode is “FROM”, the SEL key is continuously lit “red”, “orange” if
“TO”, “green” if “NONE”.
[0040]
Also, in the "crossfading in progress" state, the lighting state of the channel in which the FADER
mode is "OFF" and the channel in which the FADER mode is "ON" and the CROSSFADE mode is
"none" is "crossfading is stopped". It is the same as in the case of the state. However, if the FADER
mode is "ON" and the CROSSFADE mode is "FROM" or "TO", the SEL key 516 is set to blink. That
is, if the CROSSFADE mode is "FROM", it is "red", if it is "TO", it is "orange" and the SEL key blinks.
As a result, it is possible to notify the operator that the faders are actually driven by the blinking
state of the built-in LED of the SEL key.
[0041]
Returning to FIG. 7, when the process proceeds to step SP58, the count variable k is incremented
by "1", and the process returns to step SP44. Thereafter, the same processing is repeated for all
the channels CH [1] to CH [n]. When the same process is completed for all the channels, "YES" is
determined in step SP44, and the process proceeds to step SP59. Here, the crossfade end
interrupt is permitted. Note that "crossfade end interrupt" is an interrupt that occurs at
predetermined time intervals (crossfade end interrupt cycle) during crossfade, and determines
whether crossfade execution time has elapsed. .
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[0042]
3.5.
Crossfade Timer Interrupt Processing As described above, when "crossfade timer interrupt" is
enabled in step SP54, the crossfade timer interrupt is performed every crossfade timer interrupt
cycle and for each channel for which the interrupt is enabled. A fade timer interrupt occurs.
When this interrupt occurs, the crossfade timer interrupt routine shown in FIG. 8A is started. In
the drawing, when the process proceeds to step SP62, it is determined whether the AUTO mode
of the channel (the input channel targeted for the current process) related to the current
interrupt is set to "ON". If the determination is "NO" here, the present routine ends without
performing any substantial processing. On the other hand, if "YES" is determined in step SP62,
the process proceeds to step SP64, and the fader gain (current area 16a) of the input channel is
increased by the change amount of the channel (the change amount previously calculated in step
SP54). The values of the fader gain stored therein and the position of the fader corresponding to
the channel are changed. Therefore, when this routine is called at every crossfade timer interrupt
cycle, as long as the AUTO mode is "ON", the fader gains of all the corresponding channels are set
at the start of the crossfade set to the corresponding channel. From the fader gain to the fader
gain at the end of the crossfade, the calculated change amount is gradually updated, and in
accordance with this, the fader is automatically driven gradually.
[0043]
3.6.
Fader Operation Event Processing When the fader of any input channel is operated (manually
operated) by the operator, that effect is detected by the CPU 18 and the fader operation event
processing routine shown in FIG. 8B is started. Note that this routine is started when the fader is
operated regardless of whether or not cross fading is being performed. In the drawing, when the
process proceeds to step SP72, it is determined whether a crossfade is being performed. Note
that “crossfading in progress” indicates “the state until the crossfade end interrupt is
inhibited after the crossfade start command is received from the control device 102”. If "YES" is
determined here, the process proceeds to step SP74, and it is determined whether the FADER
mode of the input channel related to the operated fader is set to "ON".
[0044]
If "YES" is determined here, the process proceeds to step SP76, and it is determined whether the
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AUTO mode of the input channel is set to "ON". If it is determined "YES" here, the process
proceeds to step SP77, and the AUTO mode of the input channel is set to "OFF". Next, when the
process proceeds to step SP78, the corresponding portion in the current area 16a is updated so
that the fader gain of the channel becomes equal to the actual operation amount (the current
position) of the fader.
[0045]
As described above, when the AUTO mode is set to "OFF", when the crossfade timer interrupt
routine (FIG. 8A) is called thereafter, it is determined as "NO" in step SP62. The fader gain of the
input channel is not automatically updated until the current crossfade execution is completed. In
other words, when the operator operates any of the faders related to the crossfade (manual
operation) while the crossfade is being performed, the fader is selected from the crossfade
targets until the current crossfade execution is completed. Be removed. However, when a new
crossfade targeting the input channel is executed after the current crossfade is completed, step
SP52 (see FIG. 7) is executed again, whereby the AUTO mode of the input channel is changed. It
is set to "ON" again, and the fader of the input channel is automatically driven.
[0046]
On the other hand, if "NO" is determined in any of steps SP72, SP74 or SP76, step SP77 is
skipped and step SP78 is executed. This is because when the cross fade is not being performed,
when the FADER mode is "OFF", or when the AUTO mode is "OFF", the input channel related to
the operated fader is not the target of the cross fade in the first place Therefore, the
corresponding portion in the current area 16a may be simply updated according to the amount
of operation of the fader.
[0047]
3.7.
Cross-fade end interrupt processing When the cross-fade end interrupt is enabled in step SP59
(see FIG. 7), the cross-fade end interrupt routine shown in FIG. It is started. In the drawing, when
the process proceeds to step SP82, it is determined whether or not the crossfade execution time
has elapsed after the crossfade is started (after step SP59 is executed). If the determination is
"NO" here, the processing of this routine ends immediately.
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[0048]
On the other hand, if the crossfade execution time has elapsed, it is determined "YES" here, the
process proceeds to step SP84, and the crossfade timer interrupt (FIG. 8A) and the crossfade end
interrupt (FIG. 8) (c)) is prohibited. Next, when the process proceeds to step SP86, the lighting
states of the SEL keys of all the input channels are in the "crossfading in progress" state (FIG. 10
(b)) to the "crossfading in progress" state (FIG. 10 (a) Change to).
[0049]
3.8.
SEL key press event processing Regardless of whether or not cross fade is being performed,
when the SEL key 516 of any input channel is pressed, the SEL key press event processing
routine shown in FIG. 9 is activated. In the drawing, when the process proceeds to step SP102, it
is determined whether the FADER mode of the input channel is "ON". If it is determined "NO"
here, the process proceeds to step SP114, and the FADER mode is set to "ON". Next, when the
process proceeds to step SP116, the setting state of the CROSSFADE mode of the input channel is
read from the setting information table 30. Next, when the process proceeds to step SP118, the
lighting state in the SEL key is determined according to the setting state of the CROSSFADE
mode. The lighting state determined here is any one of the “crossfade stop” state (FIG. 10A).
[0050]
On the other hand, if the FADER mode is set to "ON" when the SEL key 516 is pressed, "YES" is
determined in step SP102, and the process proceeds to step SP104 and the FADER mode of the
input channel is "OFF". Set to Next, when the process proceeds to step SP106, the SEL key is
extinguished according to (OFF) of the new FADER mode. Next, when the process proceeds to
step SP108, it is determined whether a crossfade is being performed. Here, if it is determined as
"YES", the process proceeds to step SP110, and the AUTO mode of the input channel is set to
"OFF".
[0051]
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As a result, even if the crossfade timer interrupt routine (FIG. 8A) is subsequently activated for
the input channel, the fader gain is not changed depending on the routine. Next, when the
process proceeds to step SP112, the fader gain of the input channel is updated so as to be equal
to the fader gain before the cross fading. Here, the "fader gain before cross fade execution" is the
reference level in the channel of "FROM" in the CROSSFADE mode, and the lowest level "-.infin."
In the channel of "TO". Thereby, the fader is automatically driven to the position according to the
new fader gain.
[0052]
As described above, in the present embodiment, (1) the fader of the input channel is operated as
a method of stopping the cross fading for a specific input channel during the cross fading (FIG. 8
(b)). And (2) pressing the SEL key of the input channel (FIG. 9), either of two methods can be
selected. According to the former method (1), it is convenient to stop only the crossfade being
executed at that time and to update the fader gain by the manual operation of the operator.
Further, according to the latter method (2), it is convenient to use when it is desired to exclude
the input channel from the object not only in the current crossfade but also in the crossfade to be
executed thereafter.
[0053]
4.Modifications The present invention is not limited to the embodiments described above, and
various modifications can be made, for example, as follows.
[0054]
(1)
Although the above embodiment has described an example in which the present invention is
applied to a digital mixer, it goes without saying that the present invention can be applied to an
analog mixer in which an attenuator is directly connected to a fader.
Furthermore, the present invention can also be applied to various volume control devices other
than mixers.
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[0055]
(2)
In the above embodiment, the operator is notified of the distinction between the ON / OFF state
of the FADER mode and the CROSSFADE mode for each channel when it is "ON" by the lighting
state of the LED in the SEL key as shown in FIG. However, the lighting method of the LED is not
limited to that of the embodiment. The notification of the operation mode can also be performed
by a display or the like other than the LED incorporated in the SEL key.
[0056]
(3)In the above embodiment, the FADER mode and the CROSSFADE mode are notified to the
operator regardless of whether or not the cross fade is being performed, but before the cross
fade is performed, the notification of the FADER mode and the CROSSFADE mode is performed.
Alternatively, notification of these modes may be performed when notification is required, for
example, when cross fading is started.
[0057]
(4)In the above embodiment, the FADER mode and the CROSSFADE mode are notified for all the
input channels to be cross-faded, but the notification of these modes does not have to be
performed simultaneously for all the channels, and is designated by the operator The notification
may be made only for some of the channels.
[0058]
(5)Further, in the processing of steps SP118 and SP120 in the above embodiment, the SEL
corresponding to the “in crossfade stop” state (FIG. 10A) for the input channel for which the
FADER mode is newly set to “ON”. Although the key is lighted, the lighting state in this case
may be set to the “crossfade in progress” state (FIG. 10 (b)).
[0059]
(6)
Also, in step SP112 of the above embodiment, when the FADER mode is set to OFF during cross
fading, the fader gain of the corresponding input channel is set to either the reference level or
the lowest level “−∞”. .
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However, when the cross fade start command reception routine (FIG. 7) is executed, the value of
the fader gain of each input channel at that time is stored in the RAM 16 and the stored value of
the fader gain is obtained in step SP112. It may be set to
[0060]
(7)
Further, in the above embodiment, at the time of initialization of the cross fade, the fader gain at
that time of each fader is stored in the reference level designation unit 38 as the reference level
at the time of the cross fade.
However, in the case where crossfading may be performed only once, it is not necessary to set
the reference level at the time of initialization, and the reference level may be set when the
crossfade start command is received.
Specifically, instead of the process of step SP46 (FIG. 7) in the above embodiment, the process of
writing the fader gain of channel CH [k] at that time in the portion of channel CH [k] of reference
level designation unit 38 is described. It is good to execute. Further, in this case, at step SP112 in
FIG. 9, the fader gain is updated to the value written in the reference level designation unit 38.
[0061]
(8)In the above embodiment, various processes are executed by the program operating on the
CPU 18. However, only this program is stored and distributed in a recording medium such as a
CD-ROM or a flexible disk, or distributed through a transmission path. You can also.
[0062]
FIG. 1 is a block diagram of an editing system to which a digital mixer according to an
embodiment of the present invention is applied.
It is a block diagram of a digital mixer of one example of the present invention. It is a top view of
the principal part of the operation panel of the digital mixer of one Example. It is a figure which
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shows the data structure of the setting information table 30 of one Example. It is a flowchart of a
FROM machine command and a FROM channel command reception routine. 15 is a flowchart of
a TO machine command and a TO channel command reception routine. It is a flowchart of a
cross fade start command reception routine. It is a flowchart of various interruption routine /
fader operation event routine. It is a flowchart of a SEL key pressing event processing routine. It
is explanatory drawing of the lighting state of LED incorporated in each SEL key.
Explanation of sign
[0063]
2: Control signal interface, 4: Audio signal interface, 6: Signal processing circuit, 8: Bus, 10:
Operator group, 12: Display group, 14: ROM, 16: RAM, 16a: Current area, 18: CPU , 30: setting
information table, 32: channel number column, 34: input device allocation unit, 35: FADER mode
designation unit, 36: CROSSFADE mode designation unit, 37: AUTO mode designation unit, 38:
reference level designation unit, 40: Channel designation data 42: channel designation data 102:
control device 104: video device 106, 108, 110: VTR 112: digital mixer 114: sound system 5101, 510-2, ...: channel Strip, 512: ON key, 514: Rotary encoder, 516: SEL key, 5 8: Display, 524:
electric fader, 526: CUE key.
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