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JP2011091658

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2011091658
The present invention provides a portable recording device, an automatic recording adjustment
method, and a program that can perform appropriate stereo recording regardless of the
orientation of the device. SOLUTION: A recording unit which is nondirectional, and comprises
microphones arranged at least at one corner of the case and at two corners of the diagonal, a
detection unit which detects the inclination of the own device, and the detected inclination And a
controller configured to set either the left or right channel to each of the two microphones. Then,
the control unit is made to increase the recording level of the microphone positioned in the lower
direction with reference to the detected inclination of the two microphones, or decrease the
recording level of the other microphone. [Selected figure] Figure 3
Portable recording device, recording automatic adjustment method, and program
[0001]
The present invention relates to a portable recording device, an automatic recording adjustment
method, and a program.
[0002]
In recent years, portable recording devices are in widespread use, but it is also possible to add a
digital recording function to portable devices such as mobile phones, PDAs, digital cameras, etc.,
instead of devices dedicated to recording.
[0003]
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1
In order for the above-described portable recording device to extract and record voice, a
microphone, which is a device for converting voice into an electrical signal, is required.
Since the recording apparatus normally performs recording processing for Lch and Rch (L / R)
stereo reproduction, two microphones are generally arranged independently for Lch and Rch.
[0004]
For example, Patent Document 1 discloses a technique in which a microphone for Lch and a
microphone for Rch are disposed on one side of a case in a portable recording device.
The conventional portable recording device will be described with reference to FIG.
[0005]
As shown in FIG. 5, a portable recording apparatus 200 according to the prior art is configured
to include a microphone A71 for Lch and a microphone B72 for Rch on the opposite side of one
side where the operation unit 2 is provided. 5 (a) is a view showing the portable recording device
200 arranged in a normal operation direction, and FIG. 5 (b) is a view showing the portable
recording device 200 inclined to the right by 90 °. 5 (c) shows the portable recording device
200 inclining by 180.degree., And FIG. 5 (d) shows the portable recording device 200 inclining
270.degree. Right (90.degree. Left). It is the figure which showed the mode.
[0006]
In the conventional portable recording device, as shown in FIG. 5A, stereo recording can be
performed by directing a piece of the microphone disposed to the sound source to be recorded.
[0007]
JP, 2008-172679, A
[0008]
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2
On the other hand, in portable devices to which a recording function can be added, there are
many devices that can be used in any of the longitudinal direction and the lateral direction.
For example, depending on the subject (subject) to be shot, the digital camera may perform
shooting in the vertical direction in addition to shooting in the horizontal direction, and some
cameras have a recording function of not only still pictures but also moving pictures with voice
and voice. .
Furthermore, depending on the content to be displayed on the screen, PDAs and portable media
players may be used in addition to the vertical direction and also in the horizontal direction.
[0009]
In such a case, for example, as shown in FIG. 5 (a), even when the respective microphones are
arranged in the normal position (vertical direction), as shown in FIG. 5 (b) or (d), When the device
is tilted sideways, the arrangement of the microphones moves up and down, making it impossible
to obtain L / R correct stereo feeling. Also, as shown in FIG. 5C, if the recording operation is
performed with the device upside down, L / R will be upside down with respect to the sound
source, and still it is not possible to obtain a correct stereo feeling The
[0010]
An object of the present invention is to provide a portable recording device, an automatic
recording adjustment method, and a program capable of performing appropriate stereo
recording regardless of the orientation of the device.
[0011]
The invention according to claim 1 is made to achieve the above object, and in a portable
recording device, a microphone which is omnidirectional and which is disposed at least at one
corner of the housing and at two corners of the diagonal thereof. A recording unit configured by
the following; a detection unit that detects an inclination of the own device; and a control unit
that sets either the left or right channel to each of the two microphones based on the inclination
detected by the detection unit; And the like.
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[0012]
The invention according to claim 2 is the portable recording apparatus according to claim 1,
wherein the control unit uniformly adjusts the recording level of each of the two microphones
based on the inclination detected by the detection unit. It is characterized by
[0013]
The invention according to claim 3 is the portable recording apparatus according to claim 2,
wherein the control unit is positioned downward with reference to the inclination detected by the
detection unit among the two microphones. The recording level of each of the two microphones
may be uniformly adjusted by raising the recording level of the microphone or decreasing the
recording level of the other microphone.
[0014]
The invention according to claim 4 is a method of automatically adjusting sound recording in a
portable sound recording apparatus comprising a sound recording unit which is omnidirectional
and which comprises sound recording units arranged at least one corner of the housing and two
corners of the diagonal. And detecting means for detecting the inclination of the device, and
controlling means for setting any one of left and right channels in each of the two microphones
based on the inclination detected by the detecting means; Recording automatic adjustment
method including
[0015]
The invention according to claim 5 is a recording means comprising a non-directional computer,
microphones arranged at least at one corner of the case and at two corners of the diagonal, and a
detection for detecting the inclination of the own device. It is a program for functioning as
control means which sets up either of the left and right channels to each of the two microphones
based on the inclination detected by the means and the detection means.
[0016]
According to the present invention, it is possible to provide a portable recording device, an
automatic recording adjustment method, and a program capable of performing appropriate
stereo recording regardless of the orientation of the device.
[0017]
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4
It is an outline view of portable recorder 100 concerning this embodiment.
It is a block diagram showing a schematic structure of portable recorder 100 concerning this
embodiment.
It is the flowchart shown about an example of the counter setting processing performed within
portable recorder 100 concerning this embodiment.
It is a figure showing a mode that channel is matched and set up to each microphone.
It is the figure which showed the mode of the sound recording work in the portable sound
recording apparatus 200 based on a prior art.
[0018]
Hereinafter, embodiments of the present invention will be described based on the drawings.
In this embodiment, the portable recording device according to the present invention is applied
to a portable recorder.
[0019]
FIG. 1 is an external view of a portable recorder 100 according to the present embodiment.
As shown in FIG. 1, the portable recorder 100 includes a display unit 1, an operation unit 2, a
microphone A 71, and a microphone B 72.
The portable recorder 100 does not arrange the microphone A 71 and the microphone B 72
which are independent left / right pair (L / R) stereo microphones on one side (one side) as usual,
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5
but on the basis of the center of the device. It is arranged symmetrically (but it does not have to
be perfect point symmetry). That is, one microphone A 71 and one microphone B 72 are
disposed at one corner of the housing and one diagonal of the housing. Also, the microphones
(microphone A71 and microphone B72) used in the present embodiment are “nondirectional”
microphones, and when recording voices, the surrounding voices are picked up as uniformly as
possible.
[0020]
FIG. 2 is a block diagram showing a schematic configuration of the portable recorder 100
according to the present embodiment. As shown in FIG. 2, the portable recorder 100 includes a
display unit 1, an operation unit 2, a storage unit 3, a sensor 4, a control unit 5, an input terminal
6, a microphone A 71, a microphone B 72, and an ADC 8. , DAC 9, and output terminal 10.
[0021]
The display unit 1 includes, for example, a display such as liquid crystal or organic EL (Electro
Luminescence), and based on the display data output from the control unit 5, various information
(for example, text files such as track names and lyrics of music, Display an image file etc. such as
a jacket photo. The operation unit 2 includes operation key groups for operating the portable
recorder 100 (for example, a direction instruction key, an enter key, a play key, a stop key, a
record key, and the like). When the user depresses the operation key, the operation unit 2
generates an operation signal corresponding to the operation key and outputs the operation
signal to the control unit 5. A touch panel having a function as the operation unit 2 for detecting
an operation (for example, pressing by a finger or a touch pen) by the user may be placed on the
display of the display unit 1.
[0022]
The storage unit 3 includes, for example, a semiconductor memory (for example, a NAND flash
ROM) or an HDD, and an audio file (for example, mp3, wma, aac, wav etc.), an image file (jpg etc.),
a text file (txt etc.) Store various contents of Note that the audio file has tag information (content
information) indicating basic information of the audio file, in addition to audio data serving as a
sound source. The audio file stored in the storage unit 3 is subjected to signal processing by the
control unit 5 and output to the output terminal 10 as an audio signal. The image file stored in
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the storage unit 3 is subjected to signal processing by the control unit 5 and output to the
display unit 1 as display data.
[0023]
The sensor 4 is a tilt sensor, and detects the tilt of the portable recorder 100 by detecting, for
example, accelerations of three axes. For example, when the portable recorder 100 is used in the
vertical direction or in an oblique or horizontal direction, the inclination is detected. The detected
inclination is preferably in the direction in which the portable recorder 100 is facing for a
predetermined time or more with the operation of the portable recorder 100. The sensor 4
generates information indicating the tilt of the portable recorder 100 based on the acquired
detection result, and outputs the information to the control unit 5.
[0024]
The control unit 5 includes, for example, a central processing unit (CPU), a random access
memory (RAM), a read only memory (ROM), and the like, and controls each unit of the portable
recorder 100. The CPU reads out the processing program and the like stored in the ROM,
develops the program in the RAM, and executes the program to control the entire portable
recorder 100. The RAM expands a processing program and the like executed by the CPU into a
program storage area in the RAM, and stores input data and processing results and the like
generated when the processing program is executed in the data storage area. The ROM is, for
example, a semiconductor memory, and a processing program, data, and the like are stored in
advance. The ROM stores, for example, a recording automatic adjustment program that performs
channel setting and recording level adjustment for each microphone according to the inclination
of the device.
[0025]
The input terminal 6 is a terminal for inputting an external audio signal, and outputs the input
audio signal to the ADC 8. The microphone A 71 and the microphone B 72 are a pair of left and
right (L / R) stereo microphones which are independent as described above, and are
“nondirectional” microphones. When the microphone A 71 and the microphone B 72 receive
an input of audio accompanying the user's recording operation, the microphone A 71 and the
microphone B 72 convert the input audio into an audio signal and output the audio signal to the
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ADC 8. The ADC 8 is an A / D conversion circuit that converts an input analog audio signal into a
digital signal and outputs the digital signal to the control unit 5.
[0026]
The DAC 9 is a D / A conversion circuit that converts digital audio data input from the control
unit 5 into an analog audio signal and outputs the analog audio signal to the output terminal 10.
The output terminal 10 is a terminal for outputting an audio signal to the outside, and outputs
the audio signal input from the DAC 9 to the outside.
[0027]
The external I / F 11 is configured to have a removable storage medium such as, for example, an
SD card and a USB memory, and transmits and receives audio files and the like according to a
format defined with the storage medium.
[0028]
Next, the operation of the portable recorder 100 will be described.
FIG. 3 is a flowchart showing an example of the automatic recording adjustment process
performed in the portable recorder 100 according to the present embodiment. This automatic
recording adjustment process is realized by the CPU executing the automatic recording
adjustment program stored in the ROM in response to the user turning on the apparatus.
[0029]
First, as shown in FIG. 3, it is determined whether or not the portable recorder 100 has been
operated by the user (step S1). Specifically, when the user holds, rotates, or places the portable
recorder 100 by hand, whether or not there is any action to change, for example, the tilt of the
portable recorder 100. Is determined by the sensor 4. If it is determined that the portable
recorder 100 has been operated (step S1: YES), the process proceeds to the next step S2. On the
other hand, when it is determined that the portable recorder 100 is not operated (step S1: NO),
no processing is performed, and the user operation is in a standby state.
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[0030]
When the operation of the portable recorder 100 is detected (step S1: YES), it is determined
whether or not it is possible to specify the tilt of the operated portable recorder 100 (step S2).
The specification of the inclination is performed based on the information detected by the sensor
4. If the tilt of the portable recorder 100 can be specified (step S2: YES), the process proceeds to
the next step S3. On the other hand, when the inclination of the portable recorder 100 can not be
specified (step S2: NO), the process proceeds to step S4.
[0031]
If the tilt of the portable recorder 100 can be specified (step S2: YES), the channels (Lch or Rch)
are set in correspondence with the respective microphones (microphone A71 and microphone
B72) according to the tilt (step S3). ). The situation is shown in FIG.
[0032]
FIG. 4 is a diagram showing how to set channels in association with each microphone. FIG. 4A is
a view showing the portable recorder 100 arranged at an inclination based on the normal
operation direction, and FIG. 4B shows the portable recorder 100 inclined 90 ° to the right. 4
(c) shows the portable recorder 100 inclining by 180.degree., And FIG. 4 (d) shows the portable
recorder 100 inclining toward the right by 270.degree. (90.degree. Left). It is the figure which
showed the mode.
[0033]
As shown in FIG. 4A, the portable recorder 100 sets Lch to the microphone A71 that hits in the
left direction with respect to the lower direction, and sets Rch to the microphone B72 that hits in
the right direction.
[0034]
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9
FIG. 4 (b) is a state where it is inclined 90 ° to the right as compared with the state of FIG. 4 (a).
As shown in FIG. 4B, the microphone that hits leftward to the lower direction of the portable
recorder 100 is the microphone A71 and the microphone that hits the right is the microphone
B72, so Lch is set to the microphone A71 and the microphone B72 Rch is set to
[0035]
FIG.4 (c) is the state inclined 90 degree right (180 degrees from the state of FIG. 4 (a)) compared
with the state of FIG. 4 (b). As shown in FIG. 4C, the microphone that hits leftward to the lower
direction of the portable recorder 100 is the microphone B72 and the microphone that hits the
right is the microphone A71, so Lch is set to the microphone B72, and the microphone A71 Rch
is set to
[0036]
FIG. 4 (d) is a state inclined 90 ° to the right (90 ° to the left from the state of FIG. 4 (a))
compared to the state of FIG. 4 (c). As shown in FIG. 4D, the microphone that hits leftward to the
lower direction of the portable recorder 100 is the microphone B72 and the microphone that hits
the right is the microphone A71, so Lch is set to the microphone B72 and the microphone A71
Rch is set to
[0037]
On the other hand, when the tilt of the portable recorder 100 can not be specified in step S2 of
FIG. 3 (step S2: NO), the channel (Lch or Rch) is set as a default for each microphone
(microphone A71 and microphone B72) ( Step S4). If the tilt of the portable recorder 100 can not
be identified, for example, the portable recorder 100 may be arranged horizontally. The default
setting means setting Lch to the microphone A71 and setting Rch to the microphone B72.
[0038]
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10
When a channel is set for each microphone in step S3 or step S4, it is determined whether or not
the user has made an operation to start recording (step S5). Specifically, the presence or absence
of the recording start operation is determined based on whether or not the control unit 5 detects
an operation signal generated by the user pressing the recording key. When it is determined that
the recording start operation has been performed by the user (step S5: YES), the process
proceeds to the next step S6. On the other hand, when it is determined that the recording start
operation is not performed by the user (step S5: NO), no processing is performed, and the user is
in a state of waiting for the recording start operation.
[0039]
When the user performs a recording start operation (step S5: YES), the recording level of each
microphone is adjusted according to the tilt of the portable recorder 100, and a voice is recorded
(step S6). For example, as shown in FIGS. 4A and 4C, when it is determined that the tilt of the
portable recorder 100 is in the vertical direction, the microphone in the left direction is disposed
away from the sound source, so Lch Make the recording sensitivity of each microphone uniform
by raising the recording level of the microphone set or decreasing the recording level of the
microphone set Rch. On the other hand, as shown in FIGS. 4B and 4D, when it is determined that
the tilt of the portable recorder 100 is in the horizontal direction, the microphone in the right
direction is disposed away from the sound source, so The recording sensitivity of each
microphone is equalized by lowering the recording level of the microphones for which Lch is set
or decreasing the recording level of the microphones for which Rch is set.
[0040]
Next, it is determined whether the voice recording performed in step S6 is completed (step S7).
Specifically, the presence or absence of the recording stop operation is determined based on
whether the control unit 5 detects an operation signal generated by the user pressing the stop
key. If it is determined that the voice recording has ended (step S7: YES), the process proceeds to
the next step S8. On the other hand, when it is determined that the voice recording has not ended
(step S7: NO), no processing is performed, and the user is in a state of waiting for the recording
stop operation.
[0041]
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11
When the voice recording ends (step S7: YES), the channel setting and the recording level
adjustment made to each microphone are cancelled, and the setting is initialized (step S8). When
another user operation is detected, processing is newly performed from step S1.
[0042]
As described above, the portable recorder 100 according to the present embodiment is
omnidirectional, and includes a recording unit (microphone A 71, a microphone including at least
one corner of the housing and two microphones arranged at two corners of the diagonal). B72),
the detection unit (sensor 4) for detecting the inclination of the own device, and either the left or
right channel is set to each of the two microphones based on the inclination detected by the
detection unit, and the two microphones And a control unit (control unit 5) for uniformly
adjusting each recording level.
[0043]
The control unit refers to the inclination detected by the detection unit among the two
microphones, and raises the recording level of the microphone located in the lower direction or
lowers the recording level of the other microphone.
[0044]
This makes it possible to obtain a correct L / R stereo feeling regardless of the orientation of the
device by simply providing two microphones.
In addition, even when the device is rotated 180 degrees, the channels set for each microphone
can be switched, and the recording level can be adjusted according to the distance from the
sound source, so that appropriate recording can be performed. It becomes.
Furthermore, according to the portable recorder 100 according to the present embodiment, it is
possible to obtain L / R correct stereo feeling, even in a device that can be used in any of the
vertical direction and the horizontal direction.
[0045]
As mentioned above, although it explained concretely based on the embodiment concerning the
present invention, the present invention is not limited to the above-mentioned embodiment, and
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can be changed in the range which does not deviate from the gist.
[0046]
For example, in the above embodiment, two microphones, one each at one corner of the case and
its diagonal, are disposed as recording means, but as long as at least these two microphones are
provided, May have any number of microphones.
[0047]
In addition, the detailed configuration and the detailed operation of each device constituting the
portable recorder 100 can be appropriately changed without departing from the scope of the
present invention.
[0048]
100 portable recorder 1 display unit 2 operation unit 3 storage unit 4 sensor 5 control unit 6
input terminal 71 microphone A 72 microphone B 8 ADC 9 DAC 10 output terminal 11 I / F
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