JP5667402B2 - Portable terminal, audio output control program, and audio output control method - Google Patents

Description

  The present invention relates to a mobile terminal, an audio output control program, and an audio output control method, and more particularly, to a mobile terminal, an audio output control program, and an audio output control method capable of outputting audio.

  Conventionally, portable terminals capable of outputting sound are widely known, and an example of this type of device is disclosed in Patent Document 1. The mobile phone according to the background art has a function of reproducing data such as music. If the remaining battery level of the secondary battery becomes less than the threshold during data reproduction, the data reproduction is stopped.

  Further, the notebook computer of Patent Document 2 encodes an audio signal of a voice signal or a music signal. When it is determined that the remaining amount of the power battery is low, if an audio signal is input, power is saved by reducing the CPU internal clock.

Further, the portable audio playback device of Patent Document 3 includes a voltage detection circuit that detects the voltage of the battery and transmits the information to the control circuit. When the voltage of the battery reaches a preset value, the control circuit unit performs a power-saving reproduction operation that turns off the power of the display unit, thins out the digital data of the sound source, or decreases the volume.
JP 2002-199062 A [H04M 1/00, H01M 10/48, H02J 7/00, H04M 1/73] JP 2002-221995 A [G10L 19/00, G01R 31/36] JP 2002-189486 [G10K 15/04, H01M 10/44, H03G 3/30, H04R 3/00]

  However, Patent Literature 1 and Patent Literature 2 do not disclose any technology for continuing music reproduction when the remaining battery level is low during music reproduction. Further, in the portable audio playback device of Patent Document 3, in order to monitor the voltage of the battery, power for driving the voltage detection circuit and the control circuit unit is applied. That is, even if the power saving reproduction operation is performed, the power is not efficiently reduced.

  Therefore, a main object of the present invention is to provide a novel portable terminal, an audio output control program, and an audio output control method.

  Another object of the present invention is to provide a portable terminal, an audio output control program, and an audio output control method capable of efficiently reducing power consumption and extending an audio output time.

  The present invention employs the following configuration in order to solve the above problems. The reference numerals in parentheses, supplementary explanations, and the like indicate the corresponding relationship with the embodiments described in order to help understanding of the present invention, and do not limit the present invention.

1st invention is the portable terminal which can output an audio | voice, Comprising: When an audio | voice is output with a 1st output format, the 1st calculation part which calculates the 1st output possible time of the audio | voice, with a 1st output format When the sound is output, the first measuring unit for measuring time, and when the time measured by the first measuring unit reaches the first output possible time calculated by the first calculating unit, the output format of the sound is receiver for receiving a confirmation input for changing the 2 output format, when the receptionist unit accepts a confirmation input for changing the output format of the audio to the second output format changing unit that changes the output format of the audio to the second output format , When the change unit changes the sound output format to the second output format, a second calculation unit that calculates the second possible output time of the sound, and measures the time when the sound is output in the second output format Measured by the second measuring unit and the second measuring unit. When time reaches the second output enable time calculated by the second calculating section, and a termination unit for terminating the output of the voice, a portable terminal.

In the first invention, a portable terminal (10: reference numeral exemplifying corresponding part in the embodiment; hereinafter the same) can reproduce music data and output sound by a music player function or the like. For example, when the first calculation unit (24, S3, S7, S9) outputs sound in the first output format (short-range wireless communication output, earphone (stereo) output) using the speaker (22b), The first output possible time of sound is calculated from the remaining battery capacity of the next battery (46). The first measuring unit (24, S11) starts measuring time when sound is output in the first output format. The reception unit (24, S33) receives a confirmation input for changing the audio output format to the second output format when the first predetermined time has elapsed after the audio is output in the first output format, and the key input device (26). Accept by. When the accepting unit accepts the confirmation input, the changing unit (24, S41) sets the audio output format to the second output format (earphone (monaural)) in which the consumption amount of the secondary battery is lower than the first output format. Change to
A 2nd calculation part (24, S39) will calculate 2nd output possible time, if an output format is changed into a 2nd output format. The second measuring unit (24, S43) starts measuring time when sound is output in the second output format. The ending unit (24, S53) ends the audio output by ending the music player function when the second outputable time has elapsed after the audio is output in the second output format.

  In general, the power consumption is: short-range wireless communication output> speaker output> stereo output by earphone> monaural output by earphone. Therefore, when short-range wireless communication output is used as the first output format, speaker output, stereo output by the earphone, monaural output by the earphone, or the like can be used as the second output format. When speaker output is used as the first output format, stereo output using an earphone, monaural output using an earphone, or the like can be used as the second output format. Furthermore, when stereo output by an earphone is used as the first output format, monaural output by the earphone can be used as the second output format.

According to the first aspect of the invention, it is possible to change to an output method with low power consumption using the audio output time, so that power consumption can be efficiently reduced and the audio output time can be lengthened.
In addition, the secondary battery can be prevented from being completely consumed after the audio output is changed to the second output format.

  The second invention is dependent on the first invention, and when the time measured by the first measurement unit reaches the first output available time calculated by the first calculation unit, a display unit that displays a confirmation message, When the confirmation message is displayed on the display unit, the display unit further includes a no-operation measuring unit that starts measuring the no-operation time, and the changing unit is when the no-operation time measured by the no-operation measurement unit reaches a predetermined time. The audio output format is changed to the second output format.

  In the second invention, the display unit (24, S23, S25) displays a confirmation message on the display (30) when the first predetermined time has elapsed since the sound was output in the first output format. When the confirmation message is displayed, the no-operation measuring unit (24, S31) starts measuring the no-operation time indicating that the portable terminal is not operated. When the no-operation time reaches a predetermined time, the changing unit changes the audio output format to the second output format.

  According to the second invention, even in a situation where the user cannot immediately operate the mobile terminal, the audio output format is automatically changed, so that the convenience for the user is improved.

A third invention is dependent on the first invention or the second invention , and further includes a determination unit that determines whether the interrupt process has been executed, and the first calculation unit determines that the interrupt process has been executed by the determination unit when to re-calculate the first output enable time, the first measurement unit, when it is determined that the interrupt processing is executed by the determination unit, and re-measures the time of outputting the audio in the first output form .

In the third invention, the determination unit (24, S13, S15, S45, S47) determines whether an interruption process such as an incoming call process has been executed. Further, when it is determined that the interrupt process has been executed, if the sound is output in the first output format, the first output available time is recalculated, and the first measuring unit remeasures the time.

According to the third invention, even when interrupt processing is executed, the output format can be changed at an appropriate timing by recalculating the output possible time.

4th invention is the 1st calculation part which calculates the 1st output possible time of the audio | voice when the processor (24) of the portable terminal (10) which can output audio | voice outputs a audio | voice with a 1st output format. (S3, S7, S9), when the voice at the first output format is output, the first measuring unit for measuring a time (S11), the time measured by the first measurement unit is calculated by the first calculator upon reaching the first output enable time, the reception unit (S33) that receives the confirmation input for changing the output format of the audio to the second output format, confirmation input receptionist unit changes the output format of the audio to the second output format The change unit (S41) that changes the output format of the voice to the second output format when the voice is received, and calculates the second possible output time of the voice when the output format of the voice is changed to the second output format by the change unit. The second calculation unit, the second output format for voice When outputting, the second measuring unit for measuring time, and when the time measured by the second measuring unit reaches the second output available time calculated by the second calculating unit, the termination of outputting the sound This is an audio output control program that functions as a unit .

In the fourth invention as well, as in the first invention, it is possible to change to an output method with low power consumption using the audio output time, so that the power consumption is efficiently reduced and the audio output time is lengthened. be able to.
In addition, the secondary battery can be prevented from being completely consumed after the audio output is changed to the second output format.

The fifth invention is an audio output control method in a mobile terminal (10) capable of outputting audio, and when the processor of the mobile terminal outputs audio in the first output format, the audio output possible time is set. first calculation step of calculating (S3, S7, S9), when the sound is output by the first output form a first measurement step of measuring time (S11), the time measured by the first measurement step, the 1 when it reaches the calculated first output enable time calculated by step, voice accepting step of accepting an confirmation input to change the output format to the second output format (S33), receiving step is the output format of the second audio upon receiving a confirmation input for changing the output format, changing step (S41) for changing the output format of the audio to the second output format, the output format of the audio by changing step second output format When changed, the second calculation step for calculating the second possible output time of the sound, the second measurement step for measuring the time when the sound is output in the second output format, and the second measurement step are measured. This is an audio output control method for executing an end step of ending audio output when the time reaches the second output available time calculated by the second calculation step .

In the fifth invention as well, as in the first invention, it is possible to change to an output method with low power consumption using the audio output time, so that the power consumption is efficiently reduced and the audio output time is lengthened. can do.
In addition, the secondary battery can be prevented from being completely consumed after the audio output is changed to the second output format.

  According to this invention, since it can change to the output system with low power consumption based on output time, power consumption can be reduced efficiently and the output time of an audio | voice can be lengthened.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

FIG. 1 is an illustrative view showing an electrical configuration of a mobile phone according to an embodiment of the present invention. FIG. 2 is an illustrative view showing one example of an output possible time table showing the output possible time of the mobile phone in FIG. FIG. 3 is an illustrative view showing one example of a configuration of a consumption table stored in the RAM shown in FIG. FIG. 4 is an illustrative view showing one example of a GUI displayed on the display shown in FIG. FIG. 5 is an illustrative view showing one example of a memory map of the RAM shown in FIG. FIG. 6 is a flowchart showing a part of the audio output control processing of the processor shown in FIG. FIG. 7 is a part of the audio output control process of the processor shown in FIG. 1, and is a flowchart subsequent to FIG.

  Referring to FIG. 1, a mobile phone 10 of this embodiment is a kind of mobile terminal, and includes a processor 24 called a CPU or a computer. The processor 24 includes a wireless communication circuit 14, an A / D 16, a first D / A 20a, a second D / A 20b, a third D / A 20c, a key input device 26, a display driver 28, a flash memory 32, a RAM 34, and a short-range wireless. Communication circuit 38 and power supply circuit 44 are connected. An antenna 12 is connected to the wireless communication circuit 14, and a microphone 18 is connected to the A / D 16. A first speaker 22a and a second speaker 22b are connected to the first D / A 20a and the second D / A 20b via an amplifier (not shown). The audio output terminal 36 is connected to the third D / A 20c via an amplifier. A display 30 is connected to the display driver 28. A near field communication antenna 40 is connected to the near field communication circuit 38. A secondary battery 46 that is a lithium ion battery is connected to the power supply circuit 44.

  The RAM 34 is used as a work area (including a drawing area) or a buffer area of the processor 24. Content data such as characters, images, sounds, sounds and videos of the mobile phone 10 is recorded in the flash memory 32.

  The A / D 16 converts an analog audio signal for audio or sound input through the microphone 18 connected to the A / D 16 into a digital audio signal. The first D / A 20a and the second D / A 20b convert (decode) the digital audio signal into an analog audio signal, and supply the analog audio signal to the first speaker 22a and the second speaker 22b through an amplifier. Therefore, sound or sound corresponding to the analog sound signal is output from the first speaker 22a or the second speaker 22b. Also, the third D / A 20c converts the digital audio signal into an analog audio signal and supplies it to the audio output terminal 36 via an amplifier, as with the other D / A. The audio output terminal 36 is a terminal to which an earphone is connected, and the analog audio signal converted by the third D / A 20c is output from the earphone via the audio output terminal 36.

Also, the audio output terminal 36 outputs a connection signal indicating whether the earphone is connected to the processor 24. Then, when reproducing audio data stored in the RAM 34 or the like, the processor 24 outputs audio from the second speaker 22b or the earphone according to the connection state of the earphone. For example, the processor 24, if Re cry earphone is connected and outputs a digital audio signal to the 2D / A20b, and outputs the digital audio signal to the 3D / A20c if earphone is connected.

  The key input device 26 which is a key input unit includes a call key and a call end key. Then, information (key data) on the keys operated by the user is input to the processor 24. Further, when each key included in the key input device 26 is operated, a click sound is generated. Therefore, the user can obtain an operational feeling for the key operation by listening to the click sound.

  The display driver 28 controls display on the display 30 connected to the display driver 28 under the instruction of the processor 24. The display driver 28 includes a video memory (not shown) that temporarily stores image data to be displayed.

  The short-range wireless communication circuit 38 establishes short-range wireless communication of, for example, Bluetooth (registered trademark) format with the headset 42. Further, the processor 24 outputs a digital audio signal to the short-range wireless communication circuit 38 when the short-range wireless communication with the headset 42 is not established when reproducing the sound data. Further, the short-range wireless circuit 38 provides a digital audio signal to the headset 42 via the short-range wireless communication antenna 42. In the headset 42, the received digital audio signal is converted (composited) into an analog audio signal, and audio is output from an earphone (not shown).

  The power supply circuit 44 is an IC for power supply management, and the power supply circuit 44 supplies power based on the voltage of the secondary battery 46 to the entire system. Here, a state in which the power supply circuit 44 supplies power to the entire system is referred to as a power-on state. On the other hand, a state in which the power supply circuit 44 is not supplying power to the entire system is referred to as a power-off state. The power supply circuit 44 is activated when a power-on operation is performed by the key input device 26 in the power-off state, and is stopped when a power-off operation is performed in the power-on state. Further, even when the power is off, the power supply circuit 44 is activated when an external power supply is connected to an external power supply connector (not shown) and power is supplied (charged) to the secondary battery 46, and the secondary battery 46 is fully charged. Stops when a state of charge is detected. “Charging” means that the external power supply connector is connected to the external power supply and supplied with electric power from the external power supply, and the secondary battery 46 stores electric energy.

  The wireless communication circuit 14 is a circuit for performing wireless communication in the CDMA system. For example, when the user instructs a telephone call (calling) using the key input device 26, the wireless communication circuit 14 executes a telephone call process under the instruction of the processor 24, and sends a telephone call signal via the antenna 12. Is output. The telephone call signal is transmitted to the other party's telephone through a base station and a communication network (not shown). Then, when an incoming call process is performed at the other party's telephone, a communicable state is established, and the processor 24 executes a call process.

  The normal call processing will be described in detail. The modulated audio signal transmitted from the other party's telephone is received by the antenna 12. The received modulated audio signal is demodulated and decoded by the wireless communication circuit 14. The received voice signal obtained by these processes is converted into an analog voice signal by the first D / A 20a and then output from the first speaker 22a. On the other hand, the transmission voice signal captured through the microphone 18 is converted into a digital voice signal by the A / D 16 and then given to the processor 24. The transmission signal converted into the digital audio signal is subjected to encoding processing and modulation processing by the wireless communication circuit 14 under the instruction of the processor 24, and is output via the antenna 12. Therefore, the modulated voice signal is transmitted to the other party's telephone through the base station and the communication network.

  When a telephone call signal from the other party's telephone is received by the antenna 12, the radio communication circuit 14 notifies the processor 24 of an incoming call (incoming call). In response to this, the processor 24 controls the display driver 28 to display the caller information (phone number) described in the incoming call notification on the display 30. At substantially the same time, the processor 24 causes the second speaker 22b to output a ringtone (sometimes called a ringing melody or a ringing voice).

  When the user performs a response operation using the call key, the wireless communication circuit 14 executes a telephone call incoming process under the instruction of the processor 24. Then, a communicable state is established, and the processor 24 executes the normal call process described above.

  Further, when a call end operation is performed with the call end key after shifting to the call ready state, the processor 24 controls the wireless communication circuit 14 to transmit a call end signal to the other party. After transmitting the call end signal, the processor 24 ends the call process. The processor 24 also ends the call process when a call end signal is received from the other party first. Furthermore, the processor 24 also ends the call process when a call end signal is received from the mobile communication network regardless of the call partner.

  The cellular phone 10 has a music player function for reproducing sound (music) data stored in the RAM 34. When the music player function is executed, any one of the short-range wireless communication output, the speaker output, or the earphone output is selected according to the setting of the user, and music is output.

  For example, if the short-range wireless communication between the mobile phone 10 and the headset 42 is established, the short-range wireless communication output is selected. In this case, the reproduced music is output using the headset 42 in which the short-range wireless communication is established. If the mobile phone 10 has not established short-range wireless communication with the headset 42 and no earphone is connected to the audio output terminal 36, speaker output is selected. Further, when the speaker output is selected, the reproduced music is output from the second speaker 22b provided in the mobile phone 10.

  When an earphone is connected to the audio output terminal 36 of the mobile phone 10, the earphone output is selected. The earphone output is divided into an earphone (stereo) output that outputs sound from the left and right earphones, and an earphone (monaural) output that outputs sound from one of the earphones. Therefore, the processor 24 can change the output format by switching the D / A for outputting the digital audio signal. In the case of earphone output, the processor 24 selects whether the digital audio signal to be supplied to the third D / A 20c is stereo or monaural according to the settings stored in the RAM 34.

  In addition, when the music player function is executed, the time during which sound can be continuously output (output possible time) differs in the current output format regardless of the remaining battery capacity of the secondary battery 46. Referring to FIG. 2, when earphone (monaural output) is selected, output possible time is AA time, when earphone (stereo) output is selected, output possible time is BB time, and speaker output is selected. The output possible time is the CC time, and when the short-range wireless communication output is selected, the output possible time is the DD time.

  The battery capacity of the secondary battery 46 is BCmAh (milliampere hour), the current remaining battery capacity is RB%, and the amount consumed by the earphone (monaural output) every hour (battery consumption per hour) ) Is aamAh (see FIG. 3), the output possible time of the earphone (monaural output) is calculated according to the equation shown in Equation 1.

[Equation 1]
Remaining battery capacity × Battery capacity ÷ Battery consumption per hour = Output possible time However, the remaining battery capacity is the total remaining battery capacity in order to maintain the minimum power supply when the secondary battery 46 is in a low voltage state. The value obtained by removing 15% from. For example, if the secondary battery 46 is in a fully charged state (100%), the remaining battery capacity assigned to Equation 1 is 85%. The numerical value of 15% may be another numerical value.

  Referring to FIG. 3, the hourly battery consumption of the earphone (stereo) output is bbmAh, the hourly battery consumption of the speaker output is ccmAh, and the hourly battery consumption of the short-range wireless communication output is ddmAh. . The hourly battery consumption of each output format is the earphone (monaural) output is the smallest, and the earphone (stereo) output is the next largest. The speaker output is the second largest after the earphone (stereo) output, and the short-range wireless communication output is the largest. That is, the magnitude relationship of the hourly battery consumption is aa <bb <cc <dd. On the other hand, the size relationship between the output possible times of each output format is AA> BB> CC> DD, contrary to the size relationship of the hourly battery consumption. That is, the smaller the hourly battery consumption, the longer the output possible time.

  Here, when the reproduced music data is short-range wireless communication output, speaker output or earphone (stereo) output (first output format), the time (output time) from the start of outputting the sound is the output possible time. When it reaches, it is switched to the earphone (monaural) output (second output format).

  For example, when the reproduced music data is output in the short-range wireless communication, the processor 24 calculates the output possible time at the time when the output is started according to the above equation 1, and starts measuring the time. When the output time reaches a predetermined output available time (first output available time), a GUI shown in FIG. 4A is displayed.

  Referring to FIG. 4A, the display area of display 30 includes a status display area 70 and a function display area 72. In the status display area 70, an icon (sometimes referred to as a pictograph) indicating a radio wave reception state by the antenna 12, a remaining battery capacity of the secondary battery 46, and the current date and time are displayed. The current time is based on time information output by an RTC (not shown). In the function display area 72, a sentence for confirming that the output format is changed to the earphone (monaural) output, a key for accepting or rejecting the change of the output format, a cursor Cu for temporarily selecting the two keys, and a provisional selection are confirmed. A confirmation key 74 to be displayed is displayed.

  When the user changes the output format to the earphone (monaural) output, the user only has to temporarily select the acceptance key with the cursor Cu and then operate the confirmation key 74. Further, when the reproduction of the music data is finished without changing the output format, the decision key 74 may be operated after temporarily selecting the rejection key with the cursor Cu.

  When the reproduced music data is output from the earphone, the processor 24 calculates the possible output time as described above and starts measuring the time. When the output time reaches a predetermined output available time, a GUI shown in FIG. 4B is displayed. The GUI shown in FIG. 4B is different from the GUI shown in FIG. 4A, but it is still a text that confirms that the output format is changed to the earphone (monaural) output. The GUI in FIG. 4B is the same as the GUI in FIG. 4A except for the text, and thus detailed description is omitted.

  If the confirmation key 74 is not operated for a predetermined time after the GUI shown in FIGS. 4A and 4B is displayed, the output format is an earphone (monaural) even if there is no user confirmation operation. Switch to output. That is, even in a situation where the user cannot immediately operate the mobile phone 10, the output format is automatically changed, so that convenience for the user is improved.

  Furthermore, when the output format is changed to the earphone (monaural) output, the possible output time corresponding to the changed output format is calculated again. Then, after changing to the earphone (monaural) output, when the output time reaches the output available time (second output available time) corresponding to the changed output format, the processor 24 ends the music player function. That is, after changing to the earphone (monaural) output, the secondary battery 46 is not completely consumed.

  As described above, when calculating the output possible time corresponding to the changed output format again, 15% is subtracted from the remaining battery capacity of Equation 1 when calculating the output possible time corresponding to the first output format. If so, when calculating the output possible time after the change, 10% is subtracted from the remaining battery capacity of Equation 1. That is, when calculating the output possible time corresponding to the changed output format, the time for which sound is output is lengthened by increasing the remaining battery capacity that can be consumed. However, when a low voltage alert is performed when the remaining battery capacity reaches 5%, when calculating the output possible time for the first time, 20% is subtracted from the remaining battery capacity, and when calculating the changed output possible time, the remaining battery Subtract 15% from the volume. As described above, the value subtracted from the remaining battery capacity is arbitrarily changed depending on the specifications of the mobile phone.

  For example, in another embodiment, the value excluded from the total remaining battery capacity for calculating the remaining battery capacity can be an appropriate value such as 30% or 50%. In this case, if the value excluded from the total remaining battery capacity is reduced, the sound output time in the first output format is shortened, but the sound output time in the second output format can be lengthened. On the other hand, if the value excluding the total remaining battery capacity increases, the sound output time in the first output format becomes longer, but the sound output time in the second output format becomes shorter.

  Further, when an interruption process such as an incoming call occurs while playing music data, the remaining battery capacity of the secondary battery 46 changes. For this reason, when the interrupt process ends, the processor 24 recalculates the output possible time. For example, when the interruption process is a telephone incoming call process, the amount of consumption increases and the remaining battery capacity of the secondary battery 46 is greatly reduced. Therefore, even if the output format is changed in accordance with the original output possible time, the secondary battery 46 may be consumed before the output time reaches the original output possible time. However, if the available output time is recalculated after the incoming call process is completed, the output format can be changed at an appropriate timing.

  FIG. 5 is a diagram showing a memory map 300 of the RAM 34. The memory map 300 of the RAM 34 includes a program storage area 302 and a data storage area 304. A part of the program and data is read from the flash memory 32 all at once or partly and sequentially as necessary, stored in the RAM 34, and then processed by the processor 24.

  The program storage area 302 stores a program for operating the mobile phone 10. For example, a program for operating the mobile phone 10 includes an audio output program 310 and an audio output control program 312. The audio output program 310 is a program for outputting (reproducing) audio (music) data stored in the RAM 34, and is executed when the music player function is executed. The audio output control program 312 is a program for selecting an audio output format in accordance with the state of the mobile phone 10.

  Although illustration is omitted, the program for operating the mobile phone 10 includes a program for notifying the incoming call state and a program for establishing the call state.

  Subsequently, in the data storage area 304, an output possible time buffer 330 and a remaining battery capacity buffer 332 are provided, and audio data 334 and consumption table data 336 are stored. Further, the data storage area 304 is provided with an interrupt flag 338, a charge flag 340, a short-range wireless communication flag 342, an earphone flag 344, a monaural output flag 346, an output counter 348, a no-operation counter 350, and the like.

  The available output time buffer 330 temporarily stores the available output time calculated by the above equation (1). The remaining battery capacity buffer 332 stores a value indicating the remaining battery capacity of the secondary battery 46 output from the power supply circuit 44.

  The audio data 334 is read when the music player function is executed, and is output in the output format selected by the processing of the audio output control program 312. The consumption amount table data 336 is table data having the configuration shown in FIG. 3, and the consumption amount corresponding to each output format is recorded. Therefore, the consumption amount is read from the consumption amount table data 336 when calculating the output possible time.

  The interrupt flag 338 is a flag for determining whether the incoming call process or the like is executed. For example, the interrupt flag 338 is composed of a 1-bit register. When the interrupt flag 338 is turned on (established), a data value “1” is set in the register. On the other hand, when the interrupt flag 338 is turned off (not established), a data value “0” is set in the register. The interrupt flag 338 is turned on when the incoming call process or the like is executed, and turned off when the incoming call process or the incoming call process is completed.

  The charge flag 340 is a flag for determining whether or not the secondary battery 46 is in a charged state. The charging flag 340 is switched on / off based on a signal output from the power supply circuit 44. The short-range wireless communication flag 342 is a flag for determining whether short-range wireless communication is established with the headset 42 or the like. The near field communication flag 342 is switched on / off based on a signal output from the near field communication circuit 38.

  The earphone flag 344 is a flag for determining whether or not an earphone is connected to the audio output terminal 36. The earphone flag 344 is switched on / off based on a connection signal output from the audio output terminal 36. The monaural output flag 346 is a flag for determining whether or not the sound output from the earphone is set to monaural. The monaural output flag 346 is switched on / off based on the processing of the audio output control program 312.

  The output counter 348 is a counter for measuring the time during which sound is output, and starts counting when initialized. When an output timer described later is executed, the output counter 348 is initialized and counting starts. Further, when the value counted by the output counter 348 coincides with the possible output time stored in the possible output time buffer 330, the output timer expires.

  The no-operation counter 350 is a counter for measuring a predetermined time (for example, 30 seconds), and starts counting when initialized. The no-operation counter 350 is also called an no-operation timer, and when the no-operation timer is executed, the no-operation counter 350 is initialized and starts counting.

  Although not shown in the figure, the data storage area 304 stores a buffer for temporarily storing data output by the RTC, character data for displaying a character string, and the like. Counters and flags necessary for the above are also provided.

  The processor 24 performs a plurality of tasks including an OS based on Linux (registered trademark) such as Android (registered trademark) and REX, and the audio output control processing shown in FIGS. 6 and 7 under the control of other OS. Process in parallel.

  FIG. 6 is a flowchart of the audio output control process. When the audio output process is executed, the processor 24 determines whether or not the short-range wireless communication is performed in step S1. That is, the processor 24 determines whether or not the short-range wireless communication flag 342 is on. If “YES” in the step S1, for example, if the short-range wireless communication with the headset 42 has been established, the processor 24 calculates the output possible time of the short-range wireless communication in a step S3, and then proceeds to the step S11. move on. For example, the processor 24 subtracts 15% from the remaining battery capacity of the secondary battery 46 stored in the remaining battery capacity buffer 332, the battery capacity BC of the secondary battery 46, and the consumption table data 336. From the distance wireless communication consumption ddmAh, the output possible time of short-range wireless communication is calculated based on the mathematical formula according to Equation 1. Further, the calculated output available time is stored in the output available time buffer 330.

  If “NO” in the step S1, for example, if short-distance wireless communication with the headset 42 has not been established, the processor 24 determines whether or not the output is a speaker in a step S5. That is, the processor 24 determines whether or not the short-range wireless communication flag 342 and the earphone flag 344 are off. If “YES” in step S5, for example, if the mobile phone 10 has not established short-range wireless communication with the headset 42 and the earphone is not connected to the audio output terminal 36, the processor 24 proceeds to step S7. Then, the output possible time of the speaker is calculated, and the process proceeds to step S11. That is, the processor 24 reads the speaker consumption ccmAh from the consumption table data 336, and calculates the speaker output possible time in the same manner as the process of step S3.

  If “NO” in the step S5, for example, if an earphone is connected to the audio output terminal 36 and the earphone flag 344 is turned on, the processor 24 calculates an earphone output possible time in a step S9. That is, the processor 24 reads the consumption bbmAh of the earphone output (stereo) from the consumption table data 336, and calculates the output possible time, similarly to the processing of step S3 and step S7.

  The processor 24 that executes the process of step S3, step S7, or step S9 functions as a first calculation unit or a calculation unit.

  Subsequently, the processor 24 executes an output timer in step S11. That is, the processor 24 initializes the output counter 348 and starts measuring the time for outputting the sound corresponding to the sound data 334. The processor 24 that executes the process of step S11 functions as a first measurement unit or a measurement unit.

  Subsequently, in step S13, the processor 24 determines whether an interrupt process has occurred. That is, the processor 24 determines whether or not the interrupt flag 338 is turned on. If “YES” in the step S13, for example, a telephone incoming call process is executed, and if the interrupt flag 338 is turned on, the processor 24 determines whether or not the interrupt process is ended in a step S15. For example, the processor 24 determines whether or not the incoming call process and the call process are finished and the interrupt flag 338 is turned off. If “NO” in the step S15, for example, the call processing has not ended and the interrupt flag 338 remains on, the processor 24 repeatedly executes the determination in the step S15.

  On the other hand, if “YES” in the step S15, for example, the call processing is ended, and if the interrupt flag 338 is turned off, the processor 24 returns to the step S1. That is, since the remaining battery capacity of the secondary battery 46 has changed significantly, the processor 24 returns to step S1 in order to recalculate the possible output time.

  If “NO” in the step S13, that is, if the interrupt flag 338 is turned off, the processor 24 determines whether or not charging is started in a step S17. That is, the processor 24 receives power from an external power source (not shown) and determines whether the charging flag 340 is turned on. If “YES” in the step S17, that is, if the secondary battery 46 is charged, the processor 24 ends the sound output control process. That is, when the secondary battery 46 is charged, the supply amount exceeds the consumption amount, so the remaining battery capacity of the secondary battery 46 does not decrease. That is, since it is not necessary to change the output format in accordance with the change in the remaining battery capacity, the processor 24 ends the audio output control process.

  If “NO” in the step S17, that is, if the charging flag 340 is turned off, the processor 24 determines whether or not the output timer has expired in a step S19. That is, the processor 24 determines whether or not the count value of the output counter 348 coincides with the possible output time stored in the possible output time buffer 330. If “NO” in the step S19, that is, if the time which has been measured after the sound is output has not reached the output possible time, the processor 24 returns to the step S13. In other words, the presence / absence of interrupt processing and the presence / absence of charging start are repeatedly determined until the output possible time is reached.

  If “YES” in the step S19, that is, if the output timer using the output counter 348 expires, the processor 24 determines whether or not the earphone is output in a step S21. That is, the processor 24 determines whether or not the earphone flag 344 is on. If “YES” is determined in the step S19, the sound output is temporarily stopped.

  If “YES” in the step S21, that is, if sound is output from the earphone connected to the audio output terminal 36, the processor 24 displays a message for confirming whether or not to switch to monaural output in a step S23, and then in a step S31. Proceed to For example, the processor 24 displays the GUI shown in FIG. On the other hand, if “NO” in the step S21, that is, if sound is output from the earphone connected to the headset 42 or the second speaker 22b, the processor 24 switches to the earphone (monaural) output in a step S25. Display a message to confirm. For example, the processor 24 displays the GUI shown in FIG.

  The processor 24 that executes the process of step S23 or step S25 functions as a display unit.

  Subsequently, in step S27, the processor 24 determines whether or not the earphone is connected. That is, since no earphone is connected to the mobile phone 10, the processor 24 determines whether or not the earphone flag 344 is turned on. If “YES” in the step S27, that is, if the earphone is connected to the audio output terminal 36, the processor 24 proceeds to a step S31. If “NO” in the step S27, that is, if the earphone is not connected to the audio output terminal 36, the processor 24 determines whether or not a time-out occurs in a step S29. That is, the processor 24 determines whether or not a timeout period (for example, 30 seconds) has elapsed without determining whether the earphone is connected after determining the connection of the earphone. If “NO” in the step S29, for example, if 30 seconds have not elapsed, the processor 24 returns to the step S27. On the other hand, if “YES” in the step S29, for example, if 30 seconds have passed without the earphone being connected, the processor 24 ends the sound output process in a step S53. That is, if the earphone is not connected, the sound output format cannot be changed. Therefore, if the earphone is not connected after the message is displayed on the display 30 and the mobile phone 10 is left for 30 seconds, the processor 24 performs the sound output processing. finish.

  Referring to FIG. 7, processor 24 executes a no-operation timer in step S31. That is, the processor 24 initializes the no-operation counter 450. Subsequently, in step S33, the processor 24 determines whether or not an operation for changing to monaural output has been performed. That is, in the GUI shown in FIGS. 4A and 4B, it is determined whether or not the enter key 74 is operated in a state where the acceptance key is temporarily selected by the cursor Cu. The processor 24 that executes the process of step S31 functions as a no-operation measuring unit. The processor 24 that executes the process of step S33 functions as a reception unit.

  If “YES” in the step S33, for example, if the confirmation key 74 is operated in a state where the consent key is temporarily selected, the processor 24 proceeds to a step S39. On the other hand, if “NO” in the step S33, that is, if the confirmation key 74 is not operated, the processor 24 determines whether or not the no-operation timer has expired in a step S35. That is, the processor 24 determines whether or not the value of the no-operation counter 350 is a value corresponding to a certain time.

  If “NO” in the step S35, that is, if the no-operation timer has not expired, the processor 24 determines whether or not an operation that does not change the output is performed in a step S37. That is, the processor 24 determines whether or not the confirmation key 74 is operated in a state where the rejection key is temporarily selected. If “NO” in the step S37, that is, if the confirmation key 74 is not operated, the processor 24 returns to the step S33. If “YES” in the step S37, that is, if the confirmation key 74 is operated in a state where the rejection key is temporarily selected, the processor 24 ends the audio output control process.

  If “YES” in the step S35, that is, if a predetermined time elapses after the GUI shown in FIGS. 4A and 4B is displayed, the processor 24 sets the monaural output possible time in the step S39. calculate. For example, the processor 24, like step S9, the monaural consumption aamAh read from the consumption table data 336, the value obtained by subtracting 10% from the remaining battery capacity of the secondary battery 46, and the battery of the secondary battery 46 The monaural output possible time is calculated from the capacity BC. The processor 24 that executes the process of step S39 functions as a second calculation unit.

  Subsequently, the processor 24 changes to monaural output in step S41. That is, the processor 24 turns on the monaural output flag 346. Thereby, in the audio output process, a monaural digital audio signal is input to the third D / A 20c. Then, when the process of step S41 is executed, the output of the audio that has been paused is resumed. The processor 24 that executes the process of step S41 functions as a changing unit.

  Subsequently, the processor 24 executes an output timer in step S43 as in step S11. In step S45, the processor 24 determines whether or not interrupt processing is performed, as in step S13. If “YES” in the step S45, that is, if the interrupt process is executed, the processor 24 determines whether or not the interrupt process is ended in a step S47, similarly to the step S15. If “NO” in the step S47, that is, if the interrupt process is not ended, the processor 24 repeatedly executes the process of the step S47. On the other hand, if “YES” in the step S47, that is, if the interrupt process ends, the processor 24 returns to the step S39. That is, the processor 24 recalculates the monaural output possible time. The processor 24 that executes the process of step S43 functions as a second measurement unit.

  On the other hand, if “NO” in the step S45, that is, if the interrupt process is not executed, the processor 24 determines whether or not the charging is started in a step S49 similarly to the step S17. If “YES” in the step S49, that is, when charging of the secondary battery 46 is started, the processor 24 ends the sound output control process. On the other hand, if “NO” in the step S49, that is, if the charging of the secondary battery 46 is not started, the processor 24 determines whether or not the output timer has expired in a step S51, similarly to the step S19. If “NO” in the step S51, that is, if the output timer has not expired, the processor 24 returns to the step S45.

  On the other hand, if “YES” in the step S51, that is, if the output timer expires, the processor 24 ends the voice end process in a step S53. For example, the processor 24 terminates the music player function being executed in order to secure a minimum remaining battery capacity. Then, when the process of step S53 ends, the processor 24 ends the audio output control process.

  The processor 24 that executes the process of step S53 functions as an end unit. In addition, the processor 24 that executes the processes of step S13, step S15, step S45, and step S47 functions as a determination unit.

  Further, after executing the processing of step S23 or step S25, the processor 24 outputs a beep sound or vibrates a motor (not shown) to notify the user that the GUI is displayed. Good.

  Furthermore, in another embodiment, when the no-operation timer expires, the audio output process may be terminated by executing step S53 without changing to monaural output.

  As can be seen from the above description, the mobile phone 10 has a music player function, and when music data is reproduced, it is possible to output sound from an earphone or the like connected to the sound output terminal 36. Further, when sound is output from the earphone, a possible output time is calculated from the remaining battery capacity of the secondary battery 46 and the time measurement starts. Further, when the time during which the sound is output from the earphone reaches the above-described output available time, a GUI for confirming that the output format is changed to monaural is displayed on the display 30. At this time, when a confirmation operation for approving the change is performed by the user, the audio output format is changed to an earphone (monaural) output in which the consumption amount of the secondary battery 46 is low.

  Thus, since it can change to the output method with low consumption based on the output time of an audio | voice, the power consumption of the mobile telephone 10 can be reduced efficiently and the time for which an audio | voice is output can be lengthened.

  In another embodiment, the interrupt processing includes mail reception processing, alarm processing, and the like.

  In another embodiment, the output may be changed to the earphone (stereo) output before the short-range wireless communication output or the speaker output is changed to the earphone (mono) output. That is, the output format may be changed twice. For example, when the available output time is reached when sound is output from a speaker, the output format is changed to an earphone (stereo) output. Next, when the earphone (stereo) output possible time is reached, the earphone (mono) output is changed.

  And even if it is a case where an output format is changed as mentioned above, an audio | voice output control process does not change a lot. That is, when the processor 24 changes from the short-range wireless communication output or the speaker output to the earphone (stereo) output, the processor 24 re-executes the process from step S1 of the audio output control process, thereby changing the earphone (stereo) output to the earphone ( Can be changed to monaural) output.

  In general, the power consumption is: short-range wireless communication output> speaker output> earphone (stereo) output> earphone (monaural) output. Therefore, when near field communication output is used as the first output format, speaker output, earphone (stereo) output, earphone (monaural) output, or the like can be used as the second output format. When speaker output is used as the first output format, earphone (stereo) output, earphone (monaural) output, or the like can be used as the second output format. Further, when the earphone (stereo) output is used as the first output format, the earphone (monaural) output can be used as the second output format.

  The communication system of the mobile phone 10 is a CDMA system, but an LTE (Long Term Evolution) system, a W-CDMA system, a GSM system, a TDMA system, an FDMA system, a PHS system, or the like may be adopted.

  The audio output control program 312 may be stored in the HDD of the data distribution server and distributed to the mobile phone 10 via the network. In addition, the storage medium may be sold or distributed in a state where these programs are stored in an optical disk such as a CD, DVD, or BD (Blu-ray Disc), a USB memory, or a memory card. When the audio output control program 312 downloaded through the server or storage medium described above is installed in a mobile phone having the same configuration as that of this embodiment, the same effect as that of this embodiment can be obtained.

  Furthermore, the present embodiment is not limited to the mobile phone 10 but may be applied to smartphones and PDAs (Personal Digital Assistants).

  The specific values such as the remaining battery capacity, the fixed time, the predetermined time, and the time-out time listed in this specification are merely examples, and can be appropriately changed according to the product specifications and the like. is there.

DESCRIPTION OF SYMBOLS 10 ... Mobile phone 12 ... Antenna 14 ... Wireless communication circuit 20a ... 1st D / A
20b 2nd D / A
20c ... 3D / A
22a ... 1st speaker 22b ... 2nd speaker 24 ... Processor 26 ... Key input device 34 ... RAM
36 ... Audio output terminal 38 ... Short-range wireless communication circuit 42 ... Headset 44 ... Power supply circuit 46 ... Secondary battery

Claims (5)

A portable terminal capable of outputting sound,
A first calculation unit that calculates a first possible output time of the sound when the sound is output in the first output format;
A first measuring unit for measuring time when sound is output in the first output format;
A receiving unit that receives a confirmation input for changing the output format of the sound to the second output format when the time measured by the first measuring unit reaches the first output possible time calculated by the first calculating unit ;
A changing unit for changing the audio output format to the second output format when the receiving unit receives a confirmation input for changing the audio output format to the second output format ;
A second calculation unit that calculates a second possible output time of the audio when the audio output format is changed to the second output format by the changing unit;
A second measuring unit that measures time when sound is output in the second output format; and
A portable terminal, comprising: an ending unit that terminates audio output when the time measured by the second measurement unit reaches the second output available time calculated by the second calculation unit . When the time measured by the first measurement unit reaches the first possible output time calculated by the first calculation unit, a display unit that displays a confirmation message, and when the confirmation message is displayed by the display unit , Further equipped with a no-operation measuring unit for starting the measurement of no-operation time,
The portable terminal according to claim 1, wherein the change unit changes the audio output format to the second output format when the no-operation time measured by the no-operation measurement unit reaches a predetermined time. A determination unit that determines whether the interrupt process has been executed;
Wherein the first calculation unit, when it is determined that the interrupt processing is executed by the determination unit, and re-calculate the first possible output time,
Wherein the first measurement unit, when it is determined that the interrupt processing is executed by the determination unit, and re-measures the time of outputting the audio in the first output form, according to claim 1 or 2 mobile terminal according. A portable terminal processor that can output audio
A first calculation unit that calculates a first possible output time of the sound when the sound is output in the first output format;
A first measuring unit for measuring time when sound is output in the first output format;
A receiving unit that receives a confirmation input for changing the output format of the sound to the second output format when the time measured by the first measuring unit reaches the first output possible time calculated by the first calculating unit ;
A changing unit for changing the audio output format to the second output format when the receiving unit receives a confirmation input for changing the audio output format to the second output format ;
A second calculation unit that calculates a second possible output time of the audio when the audio output format is changed to the second output format by the changing unit;
A second measuring unit that measures time when sound is output in the second output format; and
An audio output control program that functions as an ending unit for ending audio output when the time measured by the second measurement unit reaches the second output available time calculated by the second calculation unit . An audio output control method in a mobile terminal capable of outputting audio, the processor of the mobile terminal,
A first calculating step for calculating a possible output time of the sound when the sound is output in the first output format;
A first measuring step for measuring time when sound is output in the first output format;
Time measured by the first measuring step, the first when it reaches the output enable time calculated by the first calculation step, accepting step of accepting an confirmation input to change the output format of the audio to the second output format ,
A change step of changing the audio output format to the second output format when the receiving step receives a confirmation input for changing the audio output format to the second output format ;
A second calculation step of calculating a second output possible time of the voice when the voice output format is changed to the second output format by the changing step;
A second measuring step for measuring time when sound is output in the second output format; and
An audio output control method for executing an end step of ending audio output when the time measured in the second measurement step reaches the second output available time calculated in the second calculation step .

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