JP2007310240A - Voice recording device, voice recording method, and voice recording program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voice recording device that can change the voice recording mode according to the use condition during voice recording, a voice recording method, and a voice recording program. <P>SOLUTION: A wireless communication terminal 100 has a voice recording function. A control part 130 amplifies the voice input from a microphone 192 by a gain amplifier 191 with a predetermined gain. The voice amplified by the gain amplifier 191 is encoded at an encoding processing part 190. The encoded voice data is stored in a user memory 150. When a switching detection part 170 detects a change in switching conditions of the wireless communication terminal 100 during the voice recording, the control part 130 controls the gain amplifier 191 to change the gain. Thereby, when there is a change in the switching condition during the voice recording, the sensitivity of the voice recording can be changed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an audio recording device, an audio recording method, and an audio recording program.

  In recent years, in portable electronic devices such as mobile phones, various data files can be stored due to the increase in memory capacity.

  In addition, since mobile phones are originally provided with a digital voice encoding circuit and decoding circuit for performing voice calls, there are mobile phones that have a function of recording voice using these (for example, patents). Reference 1).

  For example, in the technique disclosed in Patent Document 1, a grooved phone is formed from the microphone hole to the outside in order to record sound appropriately even in a lid-closed state in a two-fold cellular phone, or according to the open / close state of the lid. The gain can be changed.

However, in the technique of Patent Document 1, once recording is started, if the position of the sound source of the sound is changed during recording, the gain at the time of sound acquisition can be changed unless recording is once finished. Can not. For this reason, there is a possibility that sound cannot be recorded suitably.
JP 2004-343267 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an audio recording apparatus, an audio recording method, and an audio recording program capable of changing the recording mode during audio recording. .

In order to achieve the above object, an audio recording apparatus according to claim 1 according to the first aspect of the present invention comprises a plurality of recording modes, and the acquired audio is recorded in a predetermined recording mode.
A state discriminating unit for discriminating whether or not the voice is suitable for acquisition during the recording of the voice;
Mode changing means for changing the recording mode based on the determination result of the state determining means;
It is characterized by providing.

According to a second aspect of the present invention, in the first aspect of the present invention, the audio recording device includes two housings.
The state discriminating unit discriminates whether or not a suitable state is obtained by a change in the positional relationship between these cases.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the plurality of recording modes are a plurality of recording modes having different gains for amplifying the sound.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the plurality of recording modes are a plurality of recording modes having different encoding methods for encoding the audio.

  According to a fifth aspect of the present invention, in the first or second aspect of the present invention, a plurality of recording modes with different sampling rates for encoding the audio are provided.

  Further, in the invention described in claim 6, in the invention described in claim 4 or 5, when the recording mode is changed during the recording of the sound, the sound data is changed based on the sound recorded in the recording mode before the change. Voice data based on voice recorded in a later recording mode is generated separately.

  Further, in the invention according to claim 7, in the invention according to claim 4 or 5, when the recording mode is changed while recording the voice, the voice data based on the voice recorded in the recording mode before the change is changed. The data length is compared with the voice data based on the voice recorded in the later recording mode, and the whole is changed in accordance with the recording mode with the longer data length to generate one voice data.

An audio recording method according to claim 8 according to the second aspect of the present invention,
In an audio recording method comprising a plurality of recording modes and recording the acquired audio in a predetermined recording mode,
A state determining step for determining whether or not the sound is in a state suitable for acquisition of the sound during recording of the sound;
A mode change step of changing the recording mode based on the determination result of the state determination step;
It is characterized by including.

An audio recording program according to claim 9 according to the third aspect of the present invention,
A computer that has a plurality of recording modes and records the acquired sound in a predetermined recording mode.
A state discriminating means for discriminating whether or not the voice is suitable for acquisition during the recording of the voice;
Mode changing means for changing the recording mode based on the determination result of the state determining means;
It is made to function as.

  According to the present invention, during sound recording, it is determined whether or not the sound to be recorded is in a state suitable for acquisition, and based on the result, the recording mode is changed from a plurality of recording modes to the corresponding recording mode. Therefore, for example, when the apparatus can no longer properly record sound during recording, the sound can be recorded by changing the recording mode.

(Embodiment 1)
A wireless communication terminal 100 as an audio recording apparatus according to an embodiment of the present invention will be described with reference to the drawings. The wireless communication terminal 100 may be a mobile phone or a PHS (Personal Handyphone System).

FIG. 1 is an external view of a wireless communication terminal 100 according to the present embodiment.
As shown in FIG. 1, in the wireless communication terminal 100 of the present embodiment, an upper housing and a lower housing are connected to each other so as to be foldable by a hinge mechanism.

  In the wireless communication terminal 100 configured as described above, the microphone 192 is hidden when the open state illustrated in FIG. 1A is changed to the closed state illustrated in FIG. Therefore, when recording external sound, since sound is collected (acquired) by the microphone 192, the sensitivity is lower in the closed state than in the open state. That is, the wireless communication terminal 100 is in a state suitable for acquiring sound in the open state, and is not suitable for acquiring sound in the closed state.

FIG. 2 is a functional block diagram of the wireless communication terminal 100 according to the first embodiment.
As shown in FIG. 2, the wireless communication terminal 100 includes a communication processing unit 110, a display unit 120, a control unit 130, a program memory 140, a user memory 150, a key input unit 160, an open / close detection unit 170, a decoding processing unit 180, a code And a gain amplifier 191.

  The communication processing unit 110 receives an audio signal from the communication network via the antenna 111. Then, the received audio signal is sent to a decoding processing unit 180 described later. In addition, the communication processing unit 110 transmits an audio signal received from an encoding processing unit 190 described later to the communication network via the antenna 111. Furthermore, the communication processing unit 110 controls communication related to the data communication function, and performs, for example, access to a website and transmission / reception of e-mails.

  The display unit 120 displays various screens such as an operation screen under the control of the control unit 130.

  The control unit 130 controls the operation of each unit of the wireless communication terminal 100. The control unit 130 executes each process based on the program stored in the program memory 140. Note that each component of the wireless communication terminal 100 is connected to the control unit 130, and data transmission / reception between the components is performed via the control unit 130.

  The program memory 140 stores a program executed by the control unit 130. The program memory 140 stores basic software (so-called OS, etc.) for controlling the operation of the entire wireless communication terminal 100, audio recording software, application software for realizing various functions, and the like. The

  The audio recording software is software for causing the wireless communication terminal 100 to function as an audio recording device. When the audio recording software is loaded by the control unit 130, the wireless communication terminal 100 enters the audio recording mode and can record audio from the outside in the user memory 150.

The voice recording mode includes a dictation recording mode and a conference recording mode. The dictation recording mode is a mode for recording audio at a relatively close distance of the wireless communication terminal 100, and is set to have low sensitivity. The conference recording mode is a mode for recording a wide range of audio in a conference or the like, and its sensitivity is set higher than that of the dictation recording mode.
The sensitivity is also changed depending on the open / closed state of the wireless communication terminal 100. That is, the sensitivity is set higher in the closed state than in the open state.

  The user memory 150 mainly stores data input by the user. The user memory 150 stores address book data and mail data. It also records audio input from outside.

  The key input unit 160 receives a user operation from a key configured on the outer surface of the wireless communication terminal 100. The key input unit 160 sends an input signal corresponding to a user operation to the control unit 130.

  The key includes a center key 161, a cursor key 162, a function key 163, a side key 164, and the like.

The center key 161 is a key for determining various operations.
When the user operates the center key 161 in the voice recording mode, the user can instruct the start of recording in the set recording mode.

  The cursor key 162 is a key for selecting various operations.

  The function key 163 is a key for selecting various menus and submenus.

The side key 164 is configured on the side surface of the wireless communication terminal 100. The side key 164 can be operated even when the wireless communication terminal 100 is in the closed state.
When the user operates the side key 164 in the voice recording mode, the user can instruct the start of recording in the conference recording mode.

  These keys may function as keys for instructing other predetermined operations. Moreover, you may provide keys other than these keys suitably.

The open / close detection unit 170 detects the open / close state of the wireless communication terminal 100. For example, a magnet is provided in the upper casing, a hall element is formed in the lower casing, and an open / close state is detected by a current value applied to the hall element.
The opening / closing detection unit 170 notifies the control unit 130 of the detected opening / closing state.

  Under the control of the control unit 130, the decoding processing unit 180 receives an input of a digital audio signal from the communication processing unit 110, decodes it into analog audio, and outputs it through the speaker 181.

The encoding processing unit 190 encodes audio input from the microphone 192 and amplified by the gain amplifier 191 into a digital audio signal. Then, the encoded digital audio signal is transmitted to the communication processing unit 110 under the control of the control unit 130.
Here, for example, an AMR (adaptive multi-rate) method is used as a method for encoding speech.

  As described above, the gain amplifier 191 amplifies the sound input from the microphone 192 with a predetermined gain under the control of the control unit 130.

  With the above functions of the decoding processing unit 180 and the encoding processing unit 190, the call function of the wireless communication terminal 100 is realized.

  Further, when the wireless communication terminal 100 is in the sound recording mode, the gain amplifier 191 amplifies the sound input from the microphone 192 under the control of the control unit 130. Then, the encoding processing unit 190 encodes the audio amplified by the gain amplifier 191 under the control of the control unit 130 and records it in the user memory 150.

  As described above, in the voice recording mode, whether it is the dictation recording mode or the conference recording mode, and whether the wireless communication terminal 100 is in an open state or a closed state, that is, a state suitable for acquiring voice Sensitivity is changed depending on whether or not The control unit 130 performs control so as to change the gain of audio amplification by the gain amplifier 191 according to the mode and the open / closed state, thereby changing the sensitivity.

Specifically, for example, the gain of the gain amplifier 191 is increased by 2 dB in the closed state than in the open state. In the conference recording mode, the gain is increased by 9 dB compared to the dictation recording mode. That is, the 11 dB gain is increased in the closed state and the conference recording mode than in the open state and the dictation recording mode.
In this embodiment, as an initial setting of the voice recording mode, the open state and the dictation recording mode are set.

  A flag for determining the current open / close state and recording mode, a gain value corresponding to the open / close state and recording mode, and an initial setting of the recording mode are stored in a RAM (Random Access Memory) provided in the control unit 130 or the like. Is done. The control unit 130 controls the gain of amplification by the gain amplifier 191 by referring to the set value of the RAM.

Next, the operation of the voice recording mode of the wireless communication terminal 100 having the above configuration will be described.
FIG. 3 is a flowchart for explaining the operation in the audio recording mode of the first embodiment.
The wireless communication terminal 100 enters the voice recording mode by a predetermined operation of the function key 163 or the like by the user.

  In the voice recording mode, first, the control unit 130 determines whether or not an operation signal for the function key 163 is detected from the key input unit 160 (step S101).

  When the operation signal of the function key 163 is received (step S101; Yes), the control unit 130 causes the display unit 120 to display a submenu screen for changing the recording mode of the voice recording mode (step S102).

  The change of the recording mode is detected by detecting the operation signal of the cursor key 162 (step S103), and the changed recording mode is set by detecting the operation signal of the center key 161 (step S104).

  For example, since the default recording mode is the dictation recording mode, the recording mode is changed to the conference recording mode by the operations in steps S101 to S104.

  When the operation signal of the function key 163 is not detected in step S101 (step S101; No), the operations in steps S102 to S104 are skipped.

  Subsequently, the control unit 130 determines whether or not an operation signal for the side key 164 is detected from the key input unit 160 (step S105). That is, it is determined whether or not the start of recording in the conference recording mode is instructed by operating the side key 164.

  When the operation signal of the side key 164 is not detected (step S105; No), the control unit 130 determines whether or not the operation signal of the center key 161 is detected (step S106). That is, it is determined whether or not the start of recording in the recording mode set by the operation of the center key 161 is instructed.

  When the operation signal of the center key 161 is not detected for a predetermined time (step S106; No), the voice recording mode is terminated.

  When the operation signal of the center key 161 is detected (step S106; Yes), the control unit 130 collects (acquires) sound with the sensitivity of the recording mode set by controlling the gain amplifier 191, and codes the collected sound. The encoding processing unit 190 performs encoding (step S110).

  On the other hand, when the operation signal of the side key 164 is detected in step S105 (step S; Yes), the control unit 130 determines whether or not it is in the closed state (step S107).

  If it is determined that it is in the closed state (step S107; Yes), the recording mode is set to the conference recording mode (for the closed state) (step S108). Then, the process proceeds to step S110.

  If it is determined that it is not in the closed state (step S107; No), the recording mode is set to the conference recording mode (step S109). Then, the process proceeds to step S110.

  Following the processing of step S110, the control unit 130 determines whether or not the opening / closing detection unit 170 has detected a change in the opening / closing state (step S111).

When the opening / closing detection unit 170 does not detect a change in the opening / closing state (step S111; No), the control unit 130 repeats the operation of step S110 and the determination of step S111 until the end signal of voice recording is detected from the key input unit 160. (Step S112; No).

  If the open / close detection unit 170 detects a change in the open / close state in step S111 (step S111; Yes), the sensitivity of the gain amplifier 191 is changed based on the change in the open / close state (step S115). Then, the process returns to step S110 described above.

  When the control unit 130 detects an audio recording end signal (step S112; Yes), the control unit 130 stops recording and acquires the recording date and time and the volume of the recorded audio data (step S113).

  Then, the control unit 130 creates a file of the voice data in association with the recording date and time acquired in step S112 and the capacity, and stores it in the user memory 150 (step S114).

  When the process of step S114 ends, the voice recording mode ends. As described above, the sound is recorded with the sensitivity corresponding to the set recording mode or the open / closed state. Further, when the open / close state changes during voice recording, the voice is recorded with the sensitivity changed midway. As a result, the sound can be recorded in the optimum recording mode corresponding to the state change.

(Embodiment 2)
Next, a second embodiment of the audio recording apparatus of the present invention will be described.
FIG. 4 is a functional block diagram of the wireless communication terminal 100 according to the second embodiment.
In the second embodiment, as shown in FIG. 4, instead of the encoding processing unit 190 and the gain amplifier 191, a first encoding processing unit 193, a second encoding processing unit 194, a switch 195, a buffer 196, It differs from Embodiment 1 in the point provided with.

  The first encoding processing unit 193 encodes audio input from the microphone 192 via the switch 195 using a stereo encoding method.

  The second encoding processing unit 194 encodes the sound input from the microphone 192 via the switch 195 using a monaural encoding method.

  For example, the first encoding processing unit 193 performs encoding using an AMR method, and the second encoding processing unit 194 performs encoding using a CELP (Code Excited Linear Prediction) system.

  The switch 195 transmits the sound input from the microphone 192 to the first encoding processing unit 193 (stereo) or the second encoding processing unit 194 (monaural) under the control of the control unit 130. Thereby, the encoding method can be changed according to the recording mode and the open / closed state.

In the present embodiment, the first encoding processing unit 193 (stereo) is used in the conference recording mode regardless of the open / closed state. In the dictation recording mode, the first encoding processing unit 193 (stereo) is used in the closed state, and the second encoding processing unit 194 (monaural) is used in the open state.
In the present embodiment, as an initial setting of the audio recording mode, the open state and the dictation recording mode are set, and the second encoding processing unit 194 (monaural) is used for encoding.
Note that the settings are not limited to those as long as recording can be suitably performed, and the settings may be changed as appropriate.

  The flags for determining the current open / close state and recording mode, the encoding method corresponding to the open / close state and recording mode, and the initial setting of the recording mode are stored in a RAM (Random Access Memory) provided in the control unit 130 or the like. Is done. As in the first embodiment, the control unit 130 controls the switch 195 and changes the encoding processing unit to be used by referring to the set value of the RAM.

  In the dictation recording mode of the present embodiment, when a change in the open / close state is detected by the open / close detection unit 170 during recording, the audio data is once filed and stored at that time. Then, the encoding processing unit is switched, and the audio data input thereafter is saved as a separate file.

  In the switching of the encoding processing unit due to the change of the open / close state during recording, a delay occurs in file formation. The buffer 196 has a function of storing data corresponding to the delay.

Next, the operation of the voice recording mode of the wireless communication terminal 100 according to the second embodiment having the above configuration will be described.
FIG. 5 is a flowchart for explaining the operation in the audio recording mode of the second embodiment.

  The wireless communication terminal 100 enters the voice recording mode by a predetermined operation of the function key 163 or the like by the user.

  The operations of steps S201 to S206 and S211 to S215 in the audio recording mode of the second embodiment are the same as the operations of S101 to S106 and S111 to S115 of the first embodiment shown in FIG. In the second embodiment, numbers in the 200s are used.

  In the second embodiment, when the operation of the side key 164 is detected in step S205 (step S205; Yes), the encoding method is set to the conference recording mode (step S216). That is, since the start of recording is instructed by the side key 164, the control unit 130 controls the switch 195 so that the sound input from the microphone 192 is encoded by the first encoding processing unit 193 (stereo).

  When the encoding method is set in step S216 or when the operation of the center key 161 is detected in step S206, the control unit 130 starts sound collection (acquisition) from the microphone 192 and sets the set encoding processing unit (first step). The speech is encoded by the first encoding processing unit 193 or the second encoding processing unit 194) (step S217).

  In this embodiment, when the open / close detection unit 170 detects a change in the open / closed state in step S211 during voice recording (step S211; Yes), the encoding method is changed based on the change in the open / closed state (step S218). ). In this embodiment, when the change in the open / close state is detected during recording in the dictation recording mode, the control unit 130 controls the switch 195 to change the encoding processing unit.

  Following step S218, the control unit 130 stores in the buffer 196 the audio data encoded by the encoding processing unit (the first encoding processing unit 193 or the second encoding processing unit 194) corresponding to the encoding method after the change. It is instructed to accumulate (step S219).

Subsequent to step S219, the control unit 130 acquires the recording date and time of the audio data so far and the capacity of the recorded audio data (step S220).
Then, the recording date and capacity acquired in step S212 are associated with each other and formed into a file and stored in the user memory 150 (step S221).

  When the file formation of the audio data so far is completed in step S220, the control unit 130 inputs the audio data accumulated in the buffer 196 in step S219 (step S222). Then, the processing returns to step S217 to continue the sound collection and encoding.

  As in the first embodiment, when the process of step S214 ends, the voice recording mode ends. As described above, the voice is recorded by the set encoding method or the encoding method according to the open / close state. If the open / close state changes during voice recording, the voice can be recorded in a separate file by changing the encoding method in the middle.

Subsequently, a modification of the operation of the second embodiment will be described.
The modification is different from the second embodiment (FIG. 5) in the method of storing audio data. That is, in the second embodiment (FIG. 5), a new file is created for each change in the open / close state, which may complicate later file management. In this modification, even if the open / close state changes during audio recording, a plurality of files are re-encoded according to the long open / close state and stored as one file.

FIG. 6 is a flowchart for explaining the operation of the modified example of the audio recording mode of the second embodiment.
In the modification, steps S201 to S217 are the same as the operation in FIG.

In the modified example, when the open / close detection unit 170 detects a change in the open / close state in step S211 during audio recording (step S211; Yes), a buffer is added with an index of the recording start date and time to the data input so far. It is recorded in 196 (step S223).

  Then, the encoding method is changed based on the change in the open / close state (step S218). Then, the process returns to step S217.

  When the control unit 130 detects a voice recording end signal in step S212 (step S212; Yes), the control unit 130 acquires the recording date and time and the capacity of the recorded audio data (step S213).

  And the control part 130 discriminate | determines whether the encoding system is changed in the middle of audio | voice recording (step S224).

  If it has not been changed (step S224; No), the audio data is filed in association with the recording date and time acquired in step S212 and stored in the user memory 150 (step S214).

  On the other hand, if it has been changed (step S224; Yes), the control unit 130 refers to the buffer 196 and compares the data lengths from the indexes of the respective audio data recorded in step S223 (step S225).

  Then, the control unit 130 controls the first encoding processing unit 193 or the second encoding processing unit 194, and as a result of the comparison in step S225, for the data having the shorter data length, the code having the longer data length is encoded. Re-encoding is performed according to the encoding method (step S226).

  When re-encoding is performed in step S226, one file is created and stored by the encoding method (step S214).

  When the process of step S214 ends, the sound recording mode ends. As described above, in the modified example, even when the open / close state changes during recording of audio, when the audio data is filed, it is re-encoded according to the long open / close state and saved as one file. File management becomes easier.

(Embodiment 3)
The configuration of the wireless communication terminal 100 including the audio recording device according to the third embodiment is the same as that of the first embodiment shown in FIG.
In the third embodiment, the sampling rate of audio encoding by the encoding processing unit 190 is changed according to the open / closed state of the wireless communication terminal 100.

  In other words, in the open state, the dictation mode is uniquely determined. In the dictation mode, the voice is relatively easy to acquire, so the sampling rate is lowered. In the closed state, the conference recording mode is determined. In this case, since it may be far from the sound source, the sampling quality is increased to improve the sound quality.

  Note that the sampling rate may be changed in consideration of the limited storage capacity of the user memory 150. That is, in the conference recording mode in which recording is likely to be performed for a long time, the sampling rate is set low in order to reduce the amount of data. On the other hand, in the dictation recording mode in which the possibility of recording for a long time is low, the data amount increases, but in order to record with high sound quality, the sampling rate may be increased.

  A flag for determining the current open / close state and a sampling rate corresponding to the open / close state are stored in a RAM (Random Access Memory) provided in the control unit 130 or the like. As in the first embodiment, the control unit 130 refers to the set value of the RAM to control the encoding processing unit 190 and changes the sampling rate.

Next, the operation in the audio recording mode of the wireless communication terminal 100 according to the third embodiment will be described.
FIG. 7 is a flowchart for explaining the operation in the audio recording mode of the third embodiment.
The wireless communication terminal 100 enters the voice recording mode by a predetermined operation of the function key 163 or the like by the user.

  In the voice recording mode, first, the control unit 130 determines whether or not an operation signal for the center key 161 or the side key 164 is detected from the key input unit 160 (step S327). That is, it is determined whether or not the start of recording is instructed.

  When the operation signal of the center key 161 or the side key 164 is detected (step S327; Yes), the control unit 130 determines whether or not it is in the closed state (step S328).

  If it is determined that it is in the closed state (step S328; Yes), the conference recording mode sampling rate is set (step S329).

  If it is determined that it is not in the closed state (step S328; No), the sampling rate of the dictation recording mode is set (step S330).

  When the sampling rate is set in step S329 or S330, the control unit 130 starts sound collection (acquisition) from the microphone 192, and controls the encoding processing unit 190 to code the collected sound data at the set sampling rate. (Step S331).

The operation after the start in step S331 is the same as the operation after step S211 in the second embodiment shown in FIG. In the third embodiment, numbers in the 300s are used.
In addition, as in the modification of the second embodiment, the operation after step S331 is performed as shown in FIG. It may be re-encoded according to the state and saved as one file.

  In the third embodiment described above, the recording mode is uniquely set in the open / closed state of the wireless communication terminal 100, and the sampling rate is changed according to the recording mode. As a result, it is possible to record high-quality sound according to the usage situation or record it as low-capacity data. In addition, when the open / close state is changed during recording, the sampling rate can be automatically changed.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation and application are possible.

In the above embodiment, the folding wireless communication terminal 100 as shown in FIG. 1 has been described, but a sliding wireless communication terminal 200 as shown in FIG. 9 may be used. In the wireless communication terminal 200 as shown in FIG. 9, the present invention can be applied if FIG. 9A is in the open state and FIG. 9B is in the closed state. Even in such a slide-type wireless communication terminal 200, the microphone 292 is hidden in the closed state as shown in FIG. 9B, so that it is effective to apply the present invention when recording audio.
The present invention is also applicable to the wireless communication terminal 100 in which two casings are connected by a rotating mechanism.

  In the above embodiment, the program executed by the control unit 130 is stored in the program memory 140 in advance, but may be stored in the program memory 140 via a communication network.

  In the above embodiment, the wireless communication terminal 100 including the media data processing apparatus has been described. However, the present invention can also be applied to an information terminal such as a PDA (Personal Digital Assistants).

It is an external view of the radio | wireless communication terminal of embodiment of this invention. 2 is a functional block diagram of a wireless communication terminal according to Embodiment 1. FIG. 4 is a flowchart for explaining an operation in an audio recording mode of the first embodiment. 6 is a functional block diagram of a wireless communication terminal in Embodiment 2. FIG. 6 is a flowchart for explaining an operation in an audio recording mode of the second embodiment. 10 is a flowchart for explaining the operation of a modification of the audio recording mode of the second embodiment. 10 is a flowchart for explaining an operation in an audio recording mode of the third embodiment. 10 is a flowchart for explaining the operation of a modification of the audio recording mode of the third embodiment. It is a figure which shows the external view of the other radio | wireless communication terminal which can apply this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Wireless communication terminal, 110 ... Communication processing part, 111 ... Antenna, 120 ... Display part, 130 ... Control part, 140 ... Program memory, 150 ... User memory, 160 ... Key input part, 161 ... Center key, 162 ... Cursor Key 163 ... Function key 164 Side key 170 Open / close detection unit 180 Decoding processing unit 181 Speaker 190 Processing unit 191 Gain amplifier 192 Microphone 193 First code 194 ... second encoding processing unit, 195 ... switch, 196 ... buffer, 200 ... wireless communication terminal, 292 ... microphone

Claims (9)

In an audio recording apparatus comprising a plurality of recording modes and recording the acquired audio in a predetermined recording mode,
State determining means for determining whether or not the sound is suitable for acquisition during recording of the sound;
Mode changing means for changing the recording mode based on the determination result of the state determining means;
An audio recording apparatus comprising: The audio recording device is composed of two housings,
The audio recording apparatus according to claim 1, wherein the state determination unit determines whether or not the state is suitable based on a change in the positional relationship between the casings.   The sound recording apparatus according to claim 1, wherein the plurality of recording modes are a plurality of recording modes having different gains for amplifying the sound.   The audio recording apparatus according to claim 1, wherein the plurality of recording modes are a plurality of recording modes having different encoding methods for encoding the audio.   The audio recording apparatus according to claim 1, wherein the plurality of recording modes are a plurality of recording modes having different sampling rates for encoding the audio.   When there is a change in the recording mode during the recording of the voice, the voice data based on the voice recorded in the recording mode before the change and the voice data based on the voice recorded in the recording mode after the change are generated separately. The audio recording apparatus according to claim 4 or 5, characterized in that:   If there is a change in the recording mode while recording the audio, compare the data length of the audio data based on the audio recorded in the recording mode before the change and the audio data based on the audio recorded in the recording mode after the change, 6. The audio recording apparatus according to claim 4, wherein the audio data is generated by changing the whole in accordance with a recording mode having a longer data length. In an audio recording method comprising a plurality of recording modes and recording the acquired audio in a predetermined recording mode,
A state determining step for determining whether or not the sound is in a state suitable for acquisition of the sound during recording of the sound;
A mode change step of changing the recording mode based on the determination result of the state determination step;
A voice recording method comprising: A computer that has a plurality of recording modes and records the acquired sound in a predetermined recording mode.
A state discriminating means for discriminating whether or not the voice is suitable for acquisition during the recording of the voice;
Mode changing means for changing the recording mode based on the determination result of the state determining means;
A voice recording program characterized by being made to function as

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