JPH11110185

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DESCRIPTION JPH11110185
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
wireless microphone device, a data input device, and an infrared remote controller suitable for a
personal computer equipped with an infrared communication port.
[0002]
2. Description of the Related Art Various personal computers such as palmtop type, notebook
type and desktop type have infrared communication ports as external interfaces. By using this
infrared communication port, short distance wireless data transfer between computers is
enabled.
[0003]
On the other hand, with this type of personal computer, most of the devices are equipped with an
audio input processing function as multimedia is realized. In a conventional personal computer
provided with this type of voice input processing function, a microphone built-in type in which a
microphone for voice input is incorporated in the device body, and a microphone external
connection which connects the microphone to the device body via a lead cable. Break up with the
type.
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1
[0004]
The above-mentioned microphone built-in type device is characterized in that it is easy to use
because it does not require a microphone connection cable outside the housing, but it is difficult
to pick up electrical noise and mechanical noise in the housing. In addition to the difficult
mounting problem of having to secure a microphone mounting space in the space, it is possible
to pick up noises associated with vibration and rotational noise when mounting a rotating body
storage device such as a hard disk drive (HDD). There is a problem that the S / N (signal to noise
ratio) becomes worse.
[0005]
Also, in an external microphone type device in which a microphone is connected to the main
body of the device via a lead cable, a voice can be input since the microphone can be brought
close to the mouth and a good S / N voice input becomes possible. There is a problem that the
handling and usability are not good because the cables are crawled.
In addition, since it is necessary to manage the microphone and the microphone stand separately
from the device main body, there is a problem that the usability is poor.
[0006]
In addition, in a wireless system device using a wireless microphone in which a transmitter is
attached to the microphone and a wireless receiver is provided to the device body, it is easy to
use because a microphone connection cable is not required outside the case. On the other hand,
since it is necessary to transmit an analog voice signal picked up by a microphone to the device
body using a specific carrier frequency band and to digitally process the received voice signal in
the device body, voice input to the device body The equipment must be equipped with an analog
radio reception facility for a specific carrier frequency band for this purpose, and interference
between the frequency signal of the MHZ band handled by the reception facility and various
digital signals such as clocks handled by the equipment is likely to occur. There is a problem that
it is likely to affect Specifically, in the case of a wireless microphone of the FM modulation
system, a carrier frequency of several tens to one hundred and several dozen MHZ bands is used,
and the operation clock frequency of the CPU is one hundred and several dozen MHZ bands on
the equipment side. When considering the clock frequency etc., frequency interference becomes
an unavoidable problem, which is a major cause of operation instability.
01-05-2019
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[0007]
As described above, in a device with a built-in microphone, there is a difficult problem in
mounting that the microphone mounting space must be secured in a limited space where it is
difficult to pick up electrical noise and mechanical noise in the housing. In addition, there is a
problem that when the rotating body storage device such as a hard disk drive (HDD) is mounted,
the noise accompanying the vibration and rotation noise is picked up and the S / N becomes
worse. The external microphone type device to be connected has a problem that it is not easy to
handle and use because the lead cable is worn, and in a wireless type device using a wireless
microphone, the case of the main body of the device is It is expensive in terms of cost because an
analog receiver for receiving voice signals must be provided in the body Together there is a
problem that tends to affect the device operation. Furthermore, since the clock frequency etc.
used in the equipment and the carrier frequency etc. of the audio signal easily interfere with each
other, care must be taken in designing the equipment, and the transmission output of the audio
signal must be minimized as well. There was also a problem with the N side.
[0008]
As described above, in an information processing apparatus having a voice input processing
function in the related art, in an apparatus with a built-in microphone, electrical noise and
mechanical in a housing are generated. There is a difficult mounting problem that the
microphone mounting space must be secured in a limited space where it is difficult to pick up
noise, and vibration and rotational noise when a rotating body storage device such as a hard disk
drive (HDD) is mounted There is a problem that the accompanying noise is picked up and the S /
N becomes worse, and in the case of a microphone external type device which connects a
microphone to the device body via a lead cable, the lead cable is covered, so handling and
usability Problem in the case of a wireless system using a wireless microphone. Since it is
necessary to provide an analog receiver inside, there is a problem that it becomes expensive in
terms of cost, and the clock frequency etc. used in the apparatus easily interferes with the carrier
frequency etc. of the audio signal. Since extreme caution is required and the transmission output
of the audio signal must be suppressed as much as possible, the operation instability of the
device is easily caused, and there is also a problem in the S / N aspect of the audio signal.
[0009]
The present invention has been made in view of the above-mentioned circumstances, and an
object of the present invention is to provide a wireless microphone device capable of wirelessly
transmitting an audio signal without requiring a wireless transmitter using a specific carrier
01-05-2019
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frequency.
[0010]
In addition, the present invention enables a good S / N voice input by effectively utilizing the
infrared communication port without requiring a receiving facility for voice input in a personal
computer provided with an infrared communication port. The object is to provide a wireless
microphone device.
[0011]
The present invention also provides an infrared remote controller used in an infrared remote
controller used in a personal computer equipped with an infrared communication port, which can
handle voice as input information in addition to operation input information such as keys and
sticks. With the goal.
[0012]
Another object of the present invention is to provide an infrared remote controller which can be
used also as a wireless microphone in an infrared remote controller used for a personal computer
provided with an infrared communication port.
[0013]
The present invention also enables an S / N voice input to be performed with an economically
advantageous configuration that effectively utilizes the existing mounted functional circuit in an
infrared remote controller used in a personal computer provided with an infrared communication
port. To provide an infrared remote controller with a wireless microphone.
[0014]
SUMMARY OF THE INVENTION The present invention features a wireless microphone device and
an infrared remote controller that can transmit voice signals of the microphone to any device
without the need for a wireless transmitter using a specific carrier frequency.
[0015]
That is, the present invention is a wireless microphone device applicable to a personal computer,
comprising a circuit that converts an audio signal output from the microphone into infrared data
that can be received by an infrared port of the personal computer and transmits the converted
data. It is characterized by
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[0016]
Further, the present invention is a wireless microphone device applicable to a personal computer,
comprising: a microphone for converting device sound into an electric signal; and an A / D
converter for analog-digital converting a sound signal output from the microphone. The audio
data output from the A / D converter is converted into infrared data, and the circuit is
characterized by comprising an infrared data transmitting circuit for transmitting and outputting.
[0017]
Further, the present invention is a wireless microphone device applicable to a personal computer,
comprising: a microphone for converting sound into an electric signal; an A / D converter for
converting an audio signal outputted from the microphone into an analog-digital conversion; The
audio data output from the A / D converter is provided with an infrared data transmission circuit
that adds identification information for identifying the audio data, converts it to infrared data,
and transmits and outputs it. It features.
[0018]
The present invention is also a wireless microphone device applicable to a personal computer,
comprising: a microphone for converting sound into an electric signal; an A / D converter for
converting an audio signal outputted from the microphone into an analog signal; Means for
adding identification information to distinguish data types to either operation input means for
inputting data by operation, voice data outputted from the A / D converter or input data
according to the operation of the operation input means And an infrared data transmission
circuit which converts the audio data including the identification information and the input data
into infrared data and transmits and converts the infrared data.
[0019]
The present invention is also a wireless microphone device applicable to a personal computer,
comprising: a microphone for converting sound into an electric signal; an A / D converter for
converting an audio signal outputted from the microphone into an analog signal; It has an
operation input means for inputting data by operation, an input port for receiving audio data
outputted from the A / D converter, and an input port for receiving data inputted by the
operation input means. It is characterized by comprising an infrared data transmission circuit
which adds identification information unique to each port to data, converts it into infrared data,
and transmits and outputs it.
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[0020]
The present invention is also a wireless microphone device applicable to a personal computer,
comprising: a microphone for converting sound into an electric signal; an A / D converter for
converting an audio signal outputted from the microphone into an analog signal; Operation input
means for inputting data by operation, a first input port for receiving audio data output from the
A / D converter, a second input port for receiving data input by the operation input means, and
First data conversion means for converting data received at the first input port into first infrared
data, and second data conversion for converting data received at the second input port into
second infrared data Means for transmitting and outputting the first infrared data converted by
the first data conversion means And the optical device, characterized by comprising and a second
infrared light emitting element for transmitting an output of the second infrared data converted
by the second data conversion means.
[0021]
In the wireless microphone device according to the present invention, an infrared light emitting
element is provided on the upper end surface or the upper rear surface of the flat box type
casing.
In the wireless microphone device according to the present invention, infrared light emitting
elements are provided on the upper end face and the upper back face of the flat box type casing.
[0022]
In the wireless microphone device according to the present invention, the operation input means
includes at least one of a key, a pointing device, a variable resistor, and a switch.
[0023]
Further, the present invention is an infrared remote controller used in a personal computer,
comprising: operation input means for inputting data by manual operation; a microphone for
converting sound into an electric signal; and an analog sound signal output from the microphone
-A / D converter for digital conversion, and means for adding identification information to
distinguish data type to either audio data output from the A / D converter or input data
according to the operation of the operation input means And an infrared data transmission
circuit for converting the audio data including the identification information and the input data
into infrared data and transmitting and converting the infrared data.
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[0024]
Further, the present invention is an infrared remote controller used in a personal computer,
comprising: operation input means for inputting data by manual operation; a microphone for
converting sound into an electric signal; and an analog sound signal output from the microphone
-An A / D converter for digital conversion, an input port for receiving audio data output from the
A / D converter, and an input port for receiving data input by the operation input means, the
input port being input to each of the ports It is characterized by comprising an infrared data
transmission circuit which adds identification information unique to each port to data, converts it
into infrared data, and transmits and outputs it.
[0025]
Further, the present invention is an infrared remote controller used in a personal computer,
comprising: operation input means for inputting data by manual operation; a microphone for
converting sound into an electric signal; and an analog sound signal output from the microphone
-A / D converter for digital conversion, a first input port for receiving data input by the operation
input means, a second input port for receiving audio data output from the A / D converter, and
First data conversion means for converting data received at the first input port into first infrared
data; and second data conversion means for converting data received at the second input port
into second infrared data A first infrared light source transmitting and outputting the first
infrared data converted by the first data conversion means; And the element, characterized by
comprising and a second infrared light emitting element for transmitting an output of the second
infrared data converted by the second data conversion means.
[0026]
Further, the present invention is characterized in that, in the above-mentioned infrared remote
control, an infrared light emitting element is provided on the upper end face or the upper rear
face of the flat box type casing.
Further, according to the present invention, in the above infrared remote controller, infrared light
emitting elements are provided on the upper end face and the upper rear face of the flat box type
casing, respectively.
[0027]
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Further, the present invention is characterized in that, in the above infrared remote control, the
operation input means includes at least any of a key, a pointing device, a variable resistor, and a
switch.
[0028]
In the wireless microphone device or remote controller configured as described above, the analog
audio signal output from the microphone is converted to digital, converted to an infrared signal,
and transmitted from the infrared output port.
The audio infrared signal is received and processed by an infrared communication port provided
in the personal computer.
[0029]
By using such an infrared wireless microphone device, an audio signal can be wirelessly
transmitted without the need for a wireless transmitter using a specific carrier frequency, and the
disadvantage due to the interference of high frequency signals in a personal computer can be
realized. It is possible to cancel and maintain stable operation.
[0030]
Furthermore, in a personal computer equipped with an infrared communication port, the infrared
communication port can be effectively used without requiring a receiving facility for voice input,
and voice input with good S / N is possible.
[0031]
Further, in the infrared remote controller, in addition to operation input information such as keys
and sticks, voice can be handled as input information.
In the infrared remote controller, the remote controller can also be used as a wireless
microphone.
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Further, in the infrared remote controller, it is possible to input voice with good S / N with an
economically advantageous configuration that effectively utilizes the existing mounted functional
circuit.
[0032]
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of the main part in the first embodiment of
the present invention.
In FIG. 1, 10 is an infrared remote controller (RMT-CONT), and 20 is a personal computer (PC
main body) having a reception port (infrared communication port) of the infrared remote
controller (RMT-CONT) 10.
[0033]
Reference numerals 11 to 15 respectively constitute components of the infrared remote
controller (RMT-CONT) 10. Reference numeral 11 denotes a control unit (CONT) which controls
the entire infrared remote controller (RMT-CONT) 10, and is a one-chip microprocessor (Μ-p).
In this case, two input ports (P1, P2) and one infrared data output port (T1) are provided to
execute processing as shown in FIG.
In this embodiment, of the two input ports (P1, P2), P1 is referred to as a key input port, and P2
is referred to as an audio input port.
As shown in FIG. 3, the data (key data) input to the key input port (P1) and the data (voice data)
input to the voice input port (P2) identify key data and voice data, respectively. ID code is added
and output from the infrared data output port (T1).
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[0034]
An operation input unit 12 such as a key, a pointing device, and a button switch for inputting
data and commands by manual operation includes an audio input switch (MS) operated at the
time of audio input from a microphone. Operation data is input to the key input port (P1) of the
control unit (CONT) 11.
[0035]
A microphone (MIC) 13 for voice input is incorporated in the housing 1C with the front of the flat
box type housing 1C as a mouthpiece as shown in FIG.
An analog / digital converter (A / D-CONV) 14 digitally converts an analog voice signal output
from the microphone (MIC) 13 and inputs it to the key input port (P2) of the control unit (CONT)
11 is there.
[0036]
A light emitting unit (infrared output port) 15 is an infrared light emitting element that transmits
and outputs infrared data output from the infrared data output port (T1) of the control unit
(CONT) 11.
[0037]
Reference numerals 21 to 26 respectively constitute components of the personal computer (PC
main body) 20, and 21 receives infrared data sent from the light emitting unit (infrared output
port) 15 of the infrared remote controller (RMT-CONT) 10 It is a light receiving unit (infrared
input port).
[0038]
22 converts infrared data received by the light receiving unit (infrared input port) 21 into digital
data handled by a personal computer, and further inputs from the data from the microphone
(MIC) 13 audio data and the operation input unit 12 It is a signal processing unit that
discriminates from the key data that has been sent.
[0039]
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A digital / analog converter (D / A-CONV) 23 inputs the audio data discriminated by the signal
processing unit 22 and converts it into an analog audio signal.
An audio controller (Audio-CONT) 24 inputs an analog audio signal output from a digital / analog
converter (D / A-CONV) 23 and performs predetermined processing such as audio amplification,
audio conversion processing, audio output control, etc. Do.
[0040]
An interface circuit (SIO) 25 outputs the key data discriminated by the signal processing unit 22
onto an ISA bus (ISA-BUS) 26 in the system.
[0041]
FIG. 2 is a flowchart showing a data output processing procedure executed by the control unit
(CONT) 11.
FIG. 3 is a diagram showing the format of infrared data sent from the infrared remote controller
(RMT-CONT) 10. Here, the type of the data is input to data (key data) input from the key input
port (P1). An identification code (for example, "01") is added, and an identification code (for
example, "10") for indicating the type of the data is added to voice data input from the voice
input port (P2). Output from (T1).
[0042]
FIG. 4 is a side view showing an example of the component arrangement of the infrared remote
controller (RMT-CONT) 10, in which the light output direction of the light emitting unit (infrared
output port) 15 is forward when the microphone (MIC) 13 is used. The infrared light emitting
element which comprises the light emission part (infrared output port) 15 is provided in any one
of position Pa, Pb, Pc of the upper end surface and back surface upper part of a flat box type ¦
mold so that it may face.
[0043]
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11
The operation in the first embodiment of the present invention will be described with reference
to the above-mentioned drawings.
In the infrared remote controller (RMT-CONT) 10, key data input from the operation input unit
12 is received by the key input port (P1) of the control unit (CONT) 11, and input from the
microphone (MIC) 13 The voiced signal is input to an analog / digital converter (A / D-CONV) 14,
digitized, and then accepted by a voice input port (P2) of the control unit (CONT) 11.
[0044]
The control unit (CONT) 11 monitors data received at the key input port (P1) and determines
whether or not operation data (voice input request command) of the voice input switch (MS) is
present in the input data. (Step S1 in FIG. 2).
[0045]
Here, when the voice input switch (MS) is in the switch-on state, that is, when the voice input
request command is output, as shown in FIG. 3B, it is input from the microphone (MIC) 13 and
analog / An identification code (for example, "10") indicating voice data is added to voice data
which is converted into digital form by the digital converter (A / D-CONV) 14 and input to the
voice input port (P2). Data is converted and output from the infrared data output port (T1) (step
S2 in FIG. 2).
[0046]
The infrared data of the sound output from the infrared data output port (T1) of the control
section (CONT) 11 is input to the light emitting section (infrared output port) 15, radiated to the
external space as an infrared light signal and transmitted and output ( 2 steps S5 and S6).
[0047]
When the input data is not the operation data (voice input request command) of the voice input
switch (MS) in monitoring of the data received at the key input port (P1) (step S1 in FIG. 2),
When it is normal key data by the operation of a device or the like, an identification code (for
example, "01") indicating that it is key data is added to the data as shown in FIG. The conversion
processing is performed and output from the infrared data output port (T1) (steps S3 and S4 in
FIG. 2).
[0048]
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Infrared data according to key data output from the infrared data output port (T1) of the control
unit (CONT) 11 is input to the light emitting unit (infrared output port) 15 and emitted as an
infrared light signal to the external space and transmitted and output ( 2 steps S5 and S6).
[0049]
As described above, in the infrared remote controller (RMT-CONT) 10, when the voice input
switch (MS) is in the switch-on state, it is inputted from the microphone (MIC) 13 and the analog
/ digital converter (A / A). The audio data digitally converted by D-CONV 14 is output from the
infrared data output port (T1) in a data format to which an identification code (for example, "10")
indicating that it is audio data is added.
[0050]
An infrared light signal transmitted and output from the light emitting unit (infrared output port)
15 of the infrared remote controller (RMT-CONT) 10 is received (received) by the light receiving
unit (infrared input port) 21 of the personal computer (PC main body) 20 The signal processing
unit 22 performs discrimination processing as key data and voice data based on the identification
code of each received data.
[0051]
Here, audio data discriminatively output by the signal processing unit 22 is converted into an
analog audio signal by a digital / analog converter (D / A-CONV) 23 and then input to an audio
controller (Audio-CONT) 24 to be predetermined Processing is applied.
The key data is output onto the ISA bus (ISA-BUS) 26 through the interface circuit (SIO) 25 and
accepted by a CPU (not shown).
[0052]
With the above configuration and operation, the voice signal can be wirelessly transmitted
without the need for a wireless transmitter using a specific carrier frequency, and the problem
due to the interference of the high frequency signal in the personal computer is eliminated and
the stability is achieved. Operation can be maintained.
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In addition, in the personal computer provided with the infrared communication port, the
infrared communication port can be effectively used without requiring a receiving facility for
voice input, and voice input with good S / N can be performed.
Further, in the infrared remote controller, in addition to operation input information such as keys
and sticks, voice can be handled as input information.
In the infrared remote controller, the remote controller can also be used as a wireless
microphone.
Furthermore, in the infrared remote controller, it is possible to input voice with good S / N with
an economically advantageous configuration that effectively utilizes the existing on-board
functional circuit.
[0053]
FIG. 5 is a block diagram showing the configuration of the main part in the second embodiment
of the present invention.
The second embodiment is particularly different from the first embodiment described above in
that the control unit (CONT) 11 corresponds to two infrared data output ports (T1, T2)
corresponding to the two input ports (P1, P2) respectively. The light emitting units (infrared
output ports) 15a and 15b are provided independently for each of the infrared data output ports
(T1 and T2).
[0054]
In the second embodiment, in the infrared remote controller (RMT-CONT) 10, key data input
from the operation input unit 12 is received by the key input port (P1) of the control unit (CONT)
11, and An audio signal input from a microphone (MIC) 13 is input to an analog / digital
converter (A / D-CONV) 14, digitized, and received by an audio input port (P 2) of a control unit
(CONT) 11 Be
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[0055]
The control unit (CONT) 11 monitors data received at the key input port (P1) and determines
whether or not operation data (voice input request command) of the voice input switch (MS) is
present in the input data. Do.
[0056]
Here, when the voice input switch (MS) is in the switch-on state, that is, when the voice input
request command is output, as shown in FIG. 3B, it is input from the microphone (MIC) 13 and
analog / An identification code (for example, "10") indicating voice data is added to voice data
which is converted into digital form by the digital converter (A / D-CONV) 14 and input to the
voice input port (P2). Data is converted and output from the infrared data output port (T2).
[0057]
The infrared data of the sound output from the infrared data output port (T2) of the control
section (CONT) 11 is input to the light emitting section (infrared output port) 15b, radiated to the
external space as an infrared light signal, and transmitted and output.
[0058]
Also, when monitoring the data received at the key input port (P1), when the input data is not the
operation data (voice input request command) of the voice input switch (MS), that is, the normal
by the key, pointing device, etc. In the case of key data, as shown in FIG. 3 (a), an identification
code (for example, "01") indicating key data is added to the data, and the data is converted into
infrared data Output from output port (T1).
[0059]
Infrared data according to key data output from the infrared data output port (T1) of the control
section (CONT) 11 is input to the light emitting section (infrared output port) 15a, radiated to an
external space as an infrared light signal, and transmitted and output.
[0060]
As described above, in the infrared remote controller (RMT-CONT) 10, when the voice input
switch (MS) is in the switch-on state, it is inputted from the microphone (MIC) 13 and the analog
/ digital converter (A / The audio data digitally converted by D-CONV 14 is output from an
infrared data output port (T2) dedicated to audio output in a data format to which an
identification code (for example, "10") indicating that the audio data is added. Ru.
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[0061]
Even in the configuration of the second embodiment, the voice signal can be wirelessly
transmitted without the need for a wireless transmitter using a specific carrier frequency, and the
disadvantage due to the interference of the high frequency signal in the personal computer To
maintain stable operation.
In addition, in the personal computer provided with the infrared communication port, the
infrared communication port can be effectively used without requiring a receiving facility for
voice input, and voice input with good S / N can be performed.
Further, in the infrared remote controller, in addition to operation input information such as keys
and sticks, voice can be handled as input information.
In the infrared remote controller, the remote controller can also be used as a wireless
microphone.
Furthermore, in the infrared remote controller, it is possible to input voice with good S / N with
an economically advantageous configuration that effectively utilizes the existing on-board
functional circuit.
[0062]
In the above embodiment, a 2-bit identification code indicating key data or voice data is added to
each of the key data and the voice data, and the data is converted to infrared data and output. A
configuration in which identification information for identifying audio data is added only to audio
data, or in the second embodiment, audio data and other data are transmitted and output from
infrared output ports in different transmission forms. Various forms of infrared data, such as
configuration, are applicable.
[0063]
Further, with regard to the voice input switch (MS), for example, voice input instructing means by
a combination of other plural keys, or voice input instructing means capable of voice input only
when the voice input switch (MS) is pressed, or voice input switch Various voice input instruction
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forms are applicable, such as voice input instruction means for instructing start and end of voice
input by (MS).
[0064]
As described above, according to the present invention, voice signals can be wirelessly
transmitted without the need for a wireless transmitter using a specific carrier frequency, and
high frequency signals in a personal computer can be obtained. A stable operation can be
maintained by eliminating the inconvenience due to interference.
Furthermore, in a personal computer equipped with an infrared communication port, the infrared
communication port can be effectively used without requiring a receiving facility for voice input,
and voice input with good S / N is possible.
[0065]
Further, in the infrared remote controller, in addition to operation input information such as keys
and sticks, voice can be handled as input information.
In the infrared remote controller, the remote controller can also be used as a wireless
microphone.
Further, in the infrared remote controller, it is possible to input voice with good S / N with an
economically advantageous configuration that effectively utilizes the existing mounted functional
circuit.
[0066]
Brief description of the drawings
[0067]
1 is a block diagram showing the configuration of the main part in the first embodiment of the
present invention.
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[0068]
Flow chart showing a data output processing procedure executed by the control unit (CONT) 11
in the above embodiment.
[0069]
3 is a diagram showing the format of infrared data sent from the infrared remote controller
(RMT-CONT) 10 in the above embodiment.
[0070]
4 is a side view showing an example of the component arrangement of the infrared remote
controller (RMT-CONT) 10 in the above embodiment.
[0071]
5 is a block diagram showing the configuration of the main part in the second embodiment of the
present invention.
[0072]
Explanation of sign
[0073]
DESCRIPTION OF SYMBOLS 10 ... Infrared remote controller (RMT-CONT), 11 ... Control part
(CONT), 12 ... Operation input part, 13 ... Microphone (MIC), 14 ... Analog / digital converter (A /
D-CONV), 15, 15a , 15b: light emitting unit (infrared output port) 20: personal computer (PC
main body) 21: light receiving unit (infrared input port) 22: signal processing unit 23: digital /
analog converter (D / A-CONV) 24: Audio controller (Audio-CONT) 25: Interface circuit (SIO) 26:
ISA bus (ISA-BUS) MS: voice input switch 1C: flat box type housing
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