JP2004023535A - Communication terminal, and program and method for controlling communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform a stereophonic system recording without increasing a cost and without making a device configuration complicated in a communication terminal capable of sound recording and a communication terminal control program and a communication terminal controlling method for controlling the communication terminal. <P>SOLUTION: When an earphone microphone 130 is connected, a control part 14 sets a built-in microphone 131l of a portable telephone 100 and an external microphone 131r of the earphone microphone 130 as a pair of stereophonic system microphones to perform stereophonic system recording. Because the control part 14 separately stores sound data obtained from a left side and one from a right side (that is, separately stores sound data obtained from the built-in microphone 131l and sound data obtained from the external microphone 131r) in a ROM 15, the sound data stored in the ROM 15 can be reproduced by the stereophonic system. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a communication terminal, a communication terminal control program, and a communication terminal control method.
[0002]
[Prior art]
2. Description of the Related Art Recently, communication terminals such as mobile phones capable of recording and reproducing voices such as conversations and music have become widespread. When recording a voice with such a communication terminal, the CPU of the communication terminal captures the voice signal using a built-in monaural microphone or a connected external microphone (for example, an earphone microphone for hands-free use) and digital data ( After that, the audio data is stored (that is, recorded) in a built-in nonvolatile memory. When reproducing, the CPU reads out the audio data stored in the non-volatile memory and converts it into an audio signal, and then emits the audio from the built-in monaural speaker.
[0003]
[Problems to be solved by the invention]
However, recording in a monaural system such as the communication terminal described above lacks a sense of realism as compared with a stereo system, and it is difficult to accurately record audio. Further, recording in the stereo system requires microphones of two channels on the left and right sides, which complicates the device configuration of a communication terminal such as a mobile phone, which is desired to be reduced in size and weight, and increases the cost.
[0004]
An object of the present invention is to provide a communication terminal capable of recording sound, a communication terminal control program for controlling the communication terminal, and a communication terminal control method, which enable recording in a stereo system without increasing costs or complicating a device configuration. To provide a communication terminal, a program, and a control method.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides:
A first microphone is fixedly provided, a second microphone is detachably provided, and first audio data captured via the first microphone and second audio captured via the second microphone are provided. A communication terminal provided with audio data storage means for storing data and data, wherein control means is provided for controlling the first and second audio data to be stored in the audio data storage means as a pair of left and right stereo audio data. It is characterized by the following.
[0006]
Further, a detecting means for detecting a detached state of the second microphone is provided,
The control means includes:
When the detecting means detects that the second microphone is attached, it is preferable to control the first and second sound data to be stored in the sound data storing means as a pair of left and right stereo sound data. preferable.
[0007]
Further, it is preferable that the apparatus further comprises audio data reading means for reading the first and second audio data stored in the audio data storage means.
[0008]
Further, the audio data reading means includes:
Preferably, the first or second audio data is read in response to a selection input for selecting one of the first and second audio data stored in the audio data storage means.
[0009]
Further, it is preferable that a synthesizing means for synthesizing the first and second audio data read by the audio data reading means with monaural audio data is provided.
[0010]
Further, the synthesizing means includes:
Preferably, the first and second audio data stored in the audio data storage means are synthesized such that the audio levels are opposite in sign.
[0011]
An input level determination unit configured to determine an input level of the first and second microphones based on the first and second audio data;
Input level adjusting means for adjusting the input levels of the first and second microphones determined by the input level determining means to be equal;
It is preferable to provide
[0012]
Further, there is provided input level designating means for designating input levels of the first and second microphones, respectively.
The input level adjusting means includes:
When each of the input levels of the first and second microphones is designated, it is preferable that the input levels of the first and second microphones are respectively adjusted based on the designated input levels.
[0013]
In order to solve the above problems, the present invention provides
A first microphone is fixedly provided, a second microphone is detachably provided, and first audio data captured via the first microphone and second audio captured via the second microphone are provided. A computer that controls a communication terminal having voice data storage means for storing data and
A control function for controlling the first and second audio data to be stored in the audio data storage means as a pair of left and right stereo audio data is realized.
[0014]
In order to solve the above problems, the present invention provides
A first microphone is fixedly provided, a second microphone is detachably provided, and first audio data captured via the first microphone and second audio captured via the second microphone are provided. In a communication terminal control method for controlling a communication terminal provided with voice data storage means for storing data and
And a control step of controlling the first and second audio data to be stored in the audio data storage means as a pair of left and right stereo audio data.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the mobile phone 100 according to the embodiment of the present invention will be described in detail with reference to FIGS.
[0016]
The internal configuration of the mobile phone 100 will be described in detail with reference to FIG. FIG. 1 is a block diagram showing a main configuration of mobile phone 100.
As shown in FIG. 1, the mobile phone 100 includes an antenna 11, an RF 12, SWs 13a and 13b, a built-in microphone 131l, a built-in left speaker 133l, a built-in right speaker 133r, a control unit 14, a ROM 15, a KEY 16, a LCD (Liquid Crystal Display) 17. , An LED (Light Emitting Diode) 18, a connection detector 19, and the like.
[0017]
Here, the control unit 14 realizes the functions of the control unit, the audio data reading unit, the synthesizing unit, the input level determining unit, and the input level adjusting unit described in the claims of the present invention, and the ROM 15 has the functions of the audio data storage unit. The key 16 implements the function of the input level designating means, the connection detector 19 implements the function of the detecting means, the built-in microphone 131l implements the function of the first microphone, and the external microphone 131r The function of the second microphone is realized.
[0018]
Further, it is assumed that an earphone microphone 130 is connected to the mobile phone 100. The earphone microphone 130 includes an external microphone 131r, an external left speaker 132l, and an external right speaker 132r.
[0019]
The antenna 11 receives a radio signal transmitted from a base station (not shown) and transmits a signal output from the RF 12 of the mobile phone 100 to the base station.
[0020]
The RF 12 includes an amplifier, a modulator, and a demodulator, and amplifies a signal received by the antenna 11 with the amplifier, demodulates the signal with a demodulator, and outputs the signal to the control unit 14. Further, the transmission signal input from the control unit 14 is modulated by the modulator, amplified by the amplifier, and transmitted to the antenna 11.
[0021]
The control unit 14 executes various applications such as a call application and a recording / playback application (see the flowchart shown in FIG. 2) in response to a press signal generated by pressing various operation keys (not shown) of the KEY 16.
[0022]
When the earphone / microphone 130 is connected (that is, when the connection of the earphone / microphone 130 is detected by the connection detector 19), the control unit 14 performs recording in a stereo system when executing the recording / playback application program. When an instruction to do so is input from the KEY 16, the SW 13a is controlled to set the built-in microphone 131l and the external microphone 131r to the left microphone and the right microphone, respectively. In this case, when an instruction to perform recording in a monaural system is input from the KEY 16, the control unit 14 controls the SW 13a to stop using the built-in microphone 131l and accept only input from the external microphone 131r (see FIG. 2 (a) and description of the operation described later).
[0023]
The control unit 14 may set the built-in microphone 131l to the right microphone and the external microphone 131r to the left microphone when an instruction to record in the stereo system is input from the KEY 16. The control unit 14 may stop using the external microphone 131r and receive only the input from the built-in microphone 131l when an instruction to record in the monaural system is input from the KEY 16, or may control the input via the KEY 16 via the KEY 16. The microphone may be selected based on an instruction input for designating which of the built-in microphone 131l and the external microphone 131r is used.
[0024]
The control unit 14 includes an A / D (Analog / Digital) conversion unit 14a and a DSP (Digital Signal Processor) unit 14b. The A / D converter 14a converts an analog audio signal (hereinafter, referred to as an audio signal) fetched from the built-in microphone 131l and the external microphone 131r via the SW 13a into digital audio data (hereinafter, referred to as audio data) and a DSP. The audio data input from the unit 14b is converted into an audio signal and output to the internal left speaker 133l and the internal right speaker 133r or the external left speaker 132l and the external right speaker 132r via the SW 13b.
[0025]
When the earphone microphone 130 is not connected (that is, when the connection of the earphone microphone 130 is not detected by the connection detector 19), the control unit 14 controls the SW 13b and outputs the signal from the A / D conversion unit 14a. The audio signal is output to the built-in left speaker 133l and the built-in right speaker 133r, and when the earphone microphone 130 is connected, the SW 13b is controlled to output the audio signal output from the A / D converter 14a to the external left speaker 132l and the external left speaker 132l. Control is performed so as to input to the right speaker 132r (see the flowchart shown in FIG. 2B and the description of the operation described later).
[0026]
The control unit 14 may output an audio signal to the built-in left speaker 133l and the built-in right speaker 133r based on an instruction input from the KEY 16, even when the earphone microphone 130 is connected.
[0027]
The control unit 14 monitors whether there is an incoming call, and turns on or blinks the LED 18 when there is an incoming call. Further, the control unit 14 causes the LCD 17 to display various display information related to the application being executed.
[0028]
The DSP unit 14b performs high-speed processing on digital data such as audio data. Particularly in this case, the DSP unit 14b performs the compression / decompression processing of the audio data at a high speed.
[0029]
The ROM 15 is a rewritable nonvolatile memory such as a flash memory, and is a main control program for controlling various operations of the mobile phone 100, various application programs of the mobile phone 100 (for example, a call application and recording).・ Reproducing application program). The ROM 15 stores left and right stereo audio data.
[0030]
The KEY 16 has various operation keys such as a cursor key (not shown), an on-hook key, an off-hook key, and a numeric keypad. The KEY 16 has a selection key for selecting whether to record / reproduce in a stereo system or to record / reproduce in a monaural system.
[0031]
The LCD 17 displays various display information output from the control unit 14, and the LED 18 blinks when an incoming call is detected by the control unit 14 to notify the user of this.
[0032]
The connection detector 19 detects whether the earphone microphone 130 is connected to the mobile phone 100, and whether the external microphone 131r, the external left speaker 132l, and the external right speaker 132r are in a usable state. 14 is sent.
[0033]
The built-in microphone 131l is a monaural microphone, and converts an input voice into an analog voice signal. The voice transmitted or recorded to the communication destination is input via the built-in microphone 131l.
[0034]
The built-in left speaker 133l and the built-in right speaker 133r constitute a pair of stereo speakers, and emit a sound signal transmitted from a communication destination or a reproduced sound signal to the outside.
[0035]
The earphone microphone 130 connected to the mobile phone 100 includes an external microphone 131r, an external left speaker 132l, and an external right speaker 132r. The external microphone 131r is a monaural microphone, but the external left speaker 132l and the external right speaker 132r constitute a pair of stereo speakers.
[0036]
Next, the operation of the mobile phone 100 will be described with reference to FIG. FIG. 2A is a flowchart illustrating a recording process performed by the mobile phone 100, and FIG. 2B is a flowchart illustrating a reproduction process.
[0037]
Hereinafter, it is assumed that the earphone microphone 130 is connected to the mobile phone 100.
[0038]
First, the recording process will be described.
When an instruction to record in the stereo system is input from the KEY 16 (step S11; Yes), the control unit 14 controls the SW 13a to set the built-in microphone 131l to the left microphone and the external microphone 131r to the right microphone (step S12). ).
[0039]
After step S12, when the control unit 14 captures audio signals from the built-in microphone 131l and the external microphone 131r (step S13), the control unit 14 controls the A / D conversion unit 14a to separate the captured audio signals (analog) into left and right audio signals separately. After conversion to data (digital) (step S14), the DSP unit 14b is controlled to compress the audio data separately for the left and right (step S15), and then stores the compressed audio data for the left and right separately in the ROM 15 (step S15). Step S16).
[0040]
At the stage of step S11, when an instruction to record in the monaural system is input from the KEY 16 (step S11; No), the control unit 14 controls the SW 13a to capture a monaural audio signal from the external microphone 131r (step S17). , Step S18), controlling the A / D converter 14a to convert the captured monaural audio signal (analog) into monaural audio data (digital) (step S19), and then controlling the DSP unit 14b to After the monaural audio data is compressed (step S20), the compressed monaural audio data is stored in the ROM 15 (step S21).
[0041]
Next, the reproduction process will be described.
When a reproduction instruction is input from the KEY 16, the control unit 14 reads out audio data stored separately in the left and right ROM 15 (step S31). Next, when an instruction to reproduce in the stereo system is input from the KEY 16 (step S32; Yes), the control unit 14 controls the DSP unit 14b to decompress the read audio data separately to the left and right (step S33). Then, after controlling the A / D converter 14a to convert the expanded audio data into left and right separate audio signals (step S34), the left and right audio signals are separately applied to the external left speaker 132l and the external right speaker 132r, respectively. Sound is emitted (step S35).
[0042]
At the stage of step S32, when an instruction to reproduce in the monaural system is input from the KEY 16 (step S32; No), the control unit 14 controls the DSP unit 14b to convert the read audio data into monaural audio data. (Step S36), and the monaural audio data is expanded (step S37). After that, the control unit 14 controls the A / D conversion unit 14a to convert the expanded monaural audio data into a monaural audio signal (step S38), and then converts the monaural audio signal into the external left speaker 132l and the external left speaker 132l. Sound is emitted to both right speaker 132r (step S35).
[0043]
As described above, according to the mobile phone 100 to which the present invention is applied, when the earphone microphone 130 is connected, the control unit 14 connects the built-in microphone 131l of the mobile phone 100 and the external microphone 131r of the earphone microphone 130 to a pair. Set a stereo microphone and record in stereo. At the time of this recording, the control unit 14 stores the audio data in the ROM 15 separately for the left and right (that is, the audio data captured from the built-in microphone 131l and the audio data captured from the external microphone 131r separately). Audio data can be reproduced in stereo.
[0044]
Accordingly, the stereo recording can be performed by using the conventional built-in microphone 131l and the external microphone 131r without newly providing a stereo microphone, so that the device configuration of the mobile phone 100 becomes complicated and high cost. Can be avoided.
[0045]
Note that the description in the present embodiment shows an example of the communication terminal according to the present invention, and the present invention is not limited to this. The detailed configuration and detailed operation of the mobile phone 100 according to the present embodiment can be appropriately changed without departing from the spirit of the present invention.
[0046]
By recording the built-in microphone 131l and the external microphone 131r on different channels, the independence of the left and right channels can be made clearer. Thus, the present invention can be applied not only to the stereo recording purpose but also to various other purposes.
[0047]
For example, when recording in an environment where there is a lot of ambient noise, a function of selecting and reproducing a sound having higher sound quality from among the sounds recorded by the built-in microphone 131l or the external microphone 131r during reproduction may be provided. That is, in this case, the control unit 14 reproduces only one of the sounds recorded by the built-in microphone 131l or the external microphone 131r, which is selectively input through the KEY 16.
[0048]
Also, as in the case of recording the voice of a person in a conference, the main body of the mobile phone 100 and the earphone microphone 130 are separated from each other, and the voice of a person is mainly recorded by the external microphone 131r of the earphone microphone 130, and the surroundings are recorded by the built-in microphone 131l. During playback, the noise of the person recorded by the external microphone 131r is synthesized by reversing the surrounding noise level recorded by the built-in microphone 131l and the sound of the person recorded by the external microphone 131r. May be provided so that the voice of the person in the conference can be reproduced more clearly. That is, in this case, the control unit 14 has a function of synthesizing the audio data recorded by the built-in microphone 131l and the audio data recorded by the external microphone 131r such that the sign (sign) of the audio level is reversed.
[0049]
Further, in the present embodiment, whether to perform recording in a stereo system or in a monaural system is designated from the KEY 16. However, the present invention is not limited to this, and the stereo recording is automatically performed when the earphone microphone 130 is connected. May be set. That is, in this case, when the connection detector 19 detects that the earphone microphone 130 is connected, the control unit 14 controls the SW 13a to perform recording in a stereo format. That is, when the earphone microphone 130 is connected, the control unit 14 sets the built-in microphone 131l as the left microphone and sets the external microphone 131r as the right microphone. The right and left sides may be reversed.
[0050]
Further, the control unit 14 may store the setting of performing the recording in the stereo system or the monaural system in the ROM 15, and read the setting from the ROM 15 for recording when the power is turned on again.
[0051]
Further, the control unit 14 detects the input levels of the built-in microphone 131l and the external microphone 131r before actually recording, and activates a level adjustment mode for automatically adjusting the levels so that the detected input levels become equal to each other. You may do it.
[0052]
Further, when the control unit 14 activates the level adjustment mode, a GUI (Graphical User) capable of manually adjusting the input levels from the two microphones by the user.
(Interface) may be started.
[0053]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, recording of a stereo system can be performed in a communication terminal, such as a mobile telephone, at low cost without complicating the apparatus structure of a communication terminal.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main configuration of a mobile phone to which the present invention is applied.
FIG. 2A is a flowchart illustrating a recording process by a mobile phone to which the present invention is applied, and FIG. 2B is a flowchart illustrating a reproduction process.
[Explanation of symbols]
100 Mobile phone 11 Antenna 12 RF
130 Earphone microphone 131l Built-in microphone 131r External microphone 132l External left speaker 132r External right speaker 133l Built-in left speaker 133r Built-in right speakers 13a, 13b SW
14 control unit 14a A / D conversion unit 14b DSP unit 15 ROM
16 KEY
17 LCD
18 LED
19 Connection detector

Claims (10)

A first microphone is fixedly provided, a second microphone is detachably provided, and first audio data captured via the first microphone and second audio captured via the second microphone. A communication terminal provided with audio data storage means for storing data and control means for controlling the first and second audio data to be stored in the audio data storage means as a pair of left and right stereo audio data. A communication terminal, characterized in that: Detecting means for detecting a state of attachment / detachment of the second microphone,
The control means includes:
When the detection means detects that the second microphone is attached, control is performed such that the first and second sound data are stored in the sound data storage means as a pair of left and right stereo sound data. The communication terminal according to claim 1, wherein The communication terminal according to claim 1, further comprising an audio data reading unit that reads the first and second audio data stored in the audio data storage unit. The voice data reading means includes:
2. The method according to claim 1, wherein said first or second audio data is read in response to a selection input for selecting one of said first and second audio data stored in said audio data storage means. 3. The communication terminal according to 3. 4. The apparatus according to claim 1, further comprising a synthesizing unit for synthesizing the first and second audio data read by the audio data reading unit with monaural audio data. Communication terminal. The communication terminal according to claim 5, wherein the synthesizing unit synthesizes the first and second audio data stored in the audio data storage unit such that the audio levels are opposite in sign. . Input level determining means for determining input levels of the first and second microphones based on the first and second audio data;
Input level adjusting means for adjusting the input levels of the first and second microphones determined by the input level determining means to be equal;
The communication terminal according to any one of claims 1 to 6, further comprising: Input level specifying means for specifying input levels of the first and second microphones, respectively;
The input level adjusting means includes:
8. When the input level of each of the first and second microphones is designated, the input level of each of the first and second microphones is adjusted based on the designated input level. Communication terminal as described. A first microphone is fixedly provided, a second microphone is detachably provided, and first audio data captured via the first microphone and second audio captured via the second microphone are provided. A computer that controls a communication terminal having voice data storage means for storing data and
A communication terminal control program for realizing a control function of controlling the first and second audio data to be stored as a pair of left and right stereo audio data in the audio data storage unit. A first microphone is fixedly provided, a second microphone is detachably provided, and first audio data captured via the first microphone and second audio captured via the second microphone are provided. In a communication terminal control method for controlling a communication terminal provided with voice data storage means for storing data and
A communication terminal control method, comprising a control step of controlling the first and second audio data to be stored in the audio data storage means as a pair of left and right audio data for stereo.

Images