JP2016158117A - Terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal in which the usage of a battery can be reduced while performing voice communication.SOLUTION: A terminal includes a voice communication unit performing voice communication via a mobile communication network, a power management unit for monitoring the electric energy stored in a battery, and outputting the remaining battery level notification indicating the remaining level of a monitored battery, and a call power processing unit for instructing the voice communication unit to change to the voice communication in a voice mode suitable to the remaining battery level of a battery indicated in the remaining battery level notification, based on a table where the voice mode in voice communication prepared in advance is associated with the power consumption.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a terminal device.

  2. Description of the Related Art Conventionally, a terminal device that performs a voice call via a mobile communication network, such as a mobile phone, has been put into practical use. In the terminal device, each component provided in the terminal device, such as a communication circuit and a display circuit, is driven by, for example, electric power stored in a rechargeable battery (battery). In the battery provided in the terminal device, the amount of electric power that can be stored, that is, the battery capacity is limited. However, in recent years, it has been required to secure the usage time of the terminal device, that is, the call time, even in a limited battery capacity.

  In view of this, for example, a technique of a mobile communication terminal that aims to save power as in Patent Document 1 has been proposed. In the technique disclosed in Patent Document 1, when the power supply voltage falls below a predetermined threshold voltage, power supply to an audio signal processing circuit that performs audio signal transmission / reception and audio signal processing is stopped. . As a result, the technology disclosed in Patent Document 1 achieves power saving when there is no sound when the user (user) of the mobile communication terminal is not talking during a call, and ensures the call time.

JP 2004-147033 A

  On the other hand, in recent terminal devices, high-quality voice communication is being realized, such as adoption of a high-quality voice codec as a voice signal processing circuit and adoption of a high-speed communication circuit. For this reason, in recent terminal devices, power consumption increases with high-quality audio signal processing and high-quality communication processing. However, in the technology for power saving of the mobile communication terminal disclosed in Patent Document 1, as described above, it is possible to save power by stopping the silent processing when the user is not talking during a call. However, it is not possible to reduce the battery usage when the user is talking and the user is talking.

  The present invention has been made based on the above-described problems, and an object of the present invention is to provide a terminal device that can reduce the amount of battery usage when voice communication is performed by the terminal device.

  In order to solve the above problems, a terminal device of the present invention includes a voice communication unit that performs voice communication via a mobile communication network, and monitors the amount of power stored in the battery, and the remaining battery level of the monitored battery Based on a table in which a power management unit that outputs a battery remaining amount notification indicating the voice mode and power consumption in the voice communication prepared in advance is associated with the battery remaining amount notification, A call power processing unit that instructs the voice communication unit to change to the voice communication in a voice mode suitable for the remaining battery level of the battery.

  Advantageous Effects of Invention According to the present invention, there is an effect that it is possible to provide a terminal device that can reduce the amount of battery usage during voice communication.

It is the block diagram which showed schematic structure of the terminal device in the 1st Embodiment of this invention. It is the figure which showed an example of the table in the power management of the 1st Embodiment of this invention. It is the flowchart which showed the process procedure of the mode change in the 1st Embodiment of this invention. It is the flowchart which showed the process sequence of the power management in the 2nd Embodiment of this invention. It is the figure which showed an example of the table which matched the setting value and power consumption of the audio | voice in the power management of the 2nd Embodiment of this invention. It is the figure which showed an example of the conversion method of the battery remaining amount performed in the power management of the 2nd Embodiment of this invention. It is the figure which showed an example of the screen which notifies the information of the call possible time according to a battery remaining charge in the power management of the 2nd Embodiment of this invention. It is the flowchart which showed the process sequence of the power management in the 3rd Embodiment of this invention. It is the figure which showed an example of the table which matched the battery remaining charge in the power management of the 3rd Embodiment of this invention, and the setting value of an audio | voice and an image.

<First Embodiment>
A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration from the functional aspect of a terminal device according to the first embodiment of the present invention. The terminal device 1 includes a terminal control unit 10, an operation detection unit 20, a power management unit 30, a battery unit 31, a display control unit 40, a display 41, a camera control unit 50, a camera 51, and call management. Unit 60, audio processing unit 70, microphone 71, speaker 72, receiver 73, storage unit 80, communication control unit 90, modem unit 91, and call power processing unit 100.

  The terminal control unit 10 controls each component in the terminal device 1, that is, the entire terminal device 1.

  The operation detection unit 20 detects an operation by a user (user) of the terminal device 1 and receives an operation such as an operation instruction for the terminal device 1 input by the user. The operation detection unit 20 outputs information representing the received operation by the user to the terminal control unit 10. The display 41 is, for example, a liquid crystal display or an organic EL display, and displays input image information. The display control unit 40 controls the connected display 41. The display control unit 40 outputs and displays image information for presenting information to the user on the display 41. In the terminal device 1, the display 41 and the operation detection unit 20 may be configured as a touch panel in which both are combined. In the case of this configuration, the operation detection unit 20 includes, for example, a pressure sensor and an electrostatic sensor, detects various touch operations (such as a tap and a flick) performed by the user on the image displayed on the display 41, The input of the operation to the terminal device 1 by the user is received.

  The camera control unit 50 controls the camera 51 in accordance with control from the terminal control unit 10. The camera 51 outputs image information of a subject photographed according to control from the camera control unit 50 to the camera control unit 50. The camera control unit 50 generates image data (hereinafter referred to as “captured image”) obtained by performing various image processing on the image information input from the camera 51, and stores the generated captured image in the storage unit 80. .

  The storage unit 80 is configured by various memories such as ROM and RAM, for example, and stores a program for the terminal control unit 10 to execute various processes in the terminal device 1 and data used for the operation of the terminal device 1. To do.

  The battery unit 31 is a rechargeable battery (battery) such as a lithium ion secondary battery that supplies electric power for driving each component included in the terminal device 1. The power management unit 30 monitors (monitors) the amount of power stored in the connected battery unit 31, that is, the remaining battery level, for example, by detecting the voltage value of the battery unit 31. The power management unit 30 outputs information representing the remaining battery level of the monitored battery unit 31 (hereinafter referred to as “battery remaining amount notification”) to the call power processing unit 100.

  The call manager 60 manages the state of voice communication in the terminal device 1. More specifically, the call management unit 60 manages whether or not voice communication is performed in the terminal device 1, that is, whether or not the user is in a call. In addition, when the user is in a call, the call management unit 60 determines whether the voice communication in the call is a voice call communication using only voice or a video call communication combining voice and a photographed image. to manage. Furthermore, the call management unit 60 manages the settings of the audio signal processing applied in the audio communication. Here, the audio signal processing settings include the type of the audio codec that operates in audio communication, the bit rate value when the audio is converted by the audio codec (hereinafter referred to as the audio codec type and the bit rate value, etc.). The audio signal processing settings are collectively referred to as “audio mode”).

  The call power processing unit 100 performs overall management related to power during a call in the voice communication operation of the terminal device 1. At this time, the call power processing unit 100 controls the power consumption so as to secure the call time for voice communication in the terminal device 1 based on the remaining battery level of the battery unit 31 monitored by the power management unit 30. More specifically, the call power processing unit 100 is prepared in advance, and, for example, based on the power consumption for each voice mode stored in the storage unit 80, the voice mode switching is performed in order to secure the call time. A threshold value for the remaining battery level (hereinafter referred to as “battery remaining level threshold value”) to be performed is calculated. Then, the call power processing unit 100 generates a table (hereinafter referred to as “voice mode change table”) in which the remaining battery level threshold at which the voice mode is switched and the type of the voice mode to be switched are associated, and the generated voice mode is generated. For example, the change table is stored in the storage unit 80. Then, the call power processing unit 100 refers to the voice mode change table and instructs to change to the voice mode suitable for the remaining battery level of the battery unit 31.

  Note that the power consumption control function in the call power processing unit 100 may be realized, for example, by software that executes a program stored in the storage unit 80. In addition, in the configuration of the terminal device 1 illustrated in FIG. 1, the case where the call power processing unit 100 is provided as a single component is illustrated, but the power consumption control function of the call power processing unit 100 is For example, the structure implement | achieved as a function with which the terminal control part 10 was equipped may be sufficient. Also in this case, the function of the terminal control unit 10 and the power consumption control function of the call power processing unit 100 provided in the terminal control unit 10 may be realized by software that executes a program stored in the storage unit 80. Good.

  The voice processing unit 70 performs voice signal processing on two-way voice during a call by voice communication. A microphone 71, a speaker 72, and a receiver 73 are connected to the audio processing unit 70. The microphone 71 functions as a voice input unit that outputs a speech sound produced by the user during a call to the voice processing unit 70 as a voice signal that is an electrical signal. The speaker 72 and the receiver 73 function as an audio output unit that generates audio by converting the audio signal output from the audio processing unit 70 into physical vibration.

  The voice processing unit 70 is preset with voice modes for receiving a voice by voice communication and for speaking to send a voice by voice communication. Then, the voice processing unit 70 uses the voice codec of the set type at the time of reception to convert the voice data received by the modem unit 91 output from the communication control unit 90 into a voice signal having a set bit rate value. And the converted audio signal is output via the connected speaker 72 or receiver 73. Thereby, the user can listen to (receive) the voice that has arrived from the other party who is talking by voice communication. Further, the voice processing unit 70 converts a voice signal input from the connected microphone 71 into voice data having a set bit rate value by using a set type of voice codec at the time of speaking. The converted voice data is output to the communication control unit 90 and transmitted from the modem unit 91. Thereby, the user can talk (speak) to a remote party by voice communication.

  The communication control unit 90 controls communication using the mobile communication network in the terminal device 1 by controlling the connected modem unit 91. The modem unit 91 is a transmission / reception unit that transmits a communication packet to an existing mobile communication network and receives a communication packet from the mobile communication network. The modem unit 91 transmits a radio wave (transmission radio wave) of a communication packet to a mobile communication network via an antenna (not shown), and a radio wave (reception radio wave) of a communication packet from the mobile communication network is not shown. And a receiving unit 93 for receiving via the antenna. In transmission / reception of communication packets by the modem unit 91, communication packets (voice packets) of voice data when voice communication is performed are transmitted / received. In the transmission / reception of the communication packet by the modem unit 91, a communication packet of a control signal when performing voice communication is transmitted / received in addition to the voice packet. For example, a communication packet of a request signal for changing the voice mode is transmitted / received to / from a partner terminal device that is talking by voice communication. The communication packet of this request signal includes information such as the type of audio codec and the bit rate value. When the base station installed in the mobile communication network changes the type of the voice codec and the bit rate value, a voice mode change request communication packet may be transmitted to the base station.

  With such a configuration, the terminal device 1 performs voice communication. At this time, the terminal device 1 optimizes the power consumption in the voice codec and secures the call time by changing the voice mode in voice communication according to the remaining battery level of the battery unit 31 being monitored (monitored). Let More specifically, in the terminal device 1, the speech power processing unit 100 performs speech based on a battery remaining amount threshold that is calculated in advance based on the power consumption for each speech mode and needs to be switched between speech modes. By changing the mode according to the remaining battery level of the battery unit 31, the power consumption in the audio signal processing is optimized. That is, in the terminal device 1, the call power processing unit 100 optimizes the power consumption in the voice codec by selecting a voice codec that operates voice signal processing suitable for the remaining battery level of the battery unit 31.

  Next, a power management method in the terminal device 1 according to the first embodiment will be described. In the power management process in the terminal device 1 according to the first embodiment, the voice mode is changed to a voice mode suitable for the remaining battery level of the battery unit 31 according to the power consumption for each voice mode and the call duration to be secured. That is, it is a process of changing to the optimum sound mode for each remaining battery level of the battery unit 31.

  First, each table in the power management of the terminal device 1 of the first embodiment will be described. FIG. 2 is a diagram illustrating an example of a table in power management according to the first embodiment. FIG. 2A shows an example of a table (hereinafter referred to as “battery remaining amount table”) in which the value of the remaining battery level of the battery unit 31 and the ratio of the remaining battery level are associated with each other. The battery remaining amount table shown in FIG. 2A is based on the voltage (operating voltage) at which the terminal device 1 can operate, and the value of the battery remaining amount of the battery unit 31 acquired from the power management unit 30 is It is the table converted into the ratio of a battery remaining charge. In the remaining battery level table shown in FIG. 2A, the terminal device 1 operates when the remaining battery rate is 0 [%], that is, when the remaining battery value is greater than 10 [Wh]. It means that can be done.

  In an actual rechargeable battery (battery), the battery remaining rate [Wh] suddenly increases from about a certain value, but the ratio of the remaining battery level suddenly increases, as shown in FIG. In the example of the battery remaining amount table, for ease of explanation, an example is shown in which the relationship between the value [Wh] of the remaining battery level and the ratio [%] of the remaining battery level is linear.

  FIG. 2B shows an example of a table (hereinafter referred to as “power table”) in which the voice mode and the power consumption are associated, and FIG. 2C shows the remaining battery level threshold and the voice mode. Shows an example of a table (voice mode change table) associated with. The types of audio codecs include “AMR: Adaptive Multi-Rate CODEC” and “EVS: Enhanced Voice Services CODEC”. Here, the audio modes in the respective tables shown in FIG. 2B and FIG. 2C are specific to these audio codecs and bit rate values that can be set for each audio codec. Represents the setting of audio signal processing combined with. Each table shown in FIGS. 2A to 2C is stored in the storage unit 80.

  In the power table shown in FIG. 2B, the power consumption value when the audio signal processing is performed with the audio codec type and the bit rate value in each audio mode is associated with each audio mode. Yes. In the power table shown in FIG. 2B, the power consumption value in each of the four types of voice modes (mode 1 to mode 4) (the power consumption value per hour in FIG. 2B). An example is shown. For example, the call power processing unit 100 calculates a remaining battery level threshold value for switching the voice mode in order to secure a call time designated by the user (hereinafter referred to as “callable time”) based on the power table. Here, a calculation method of the remaining battery level threshold in the call power processing unit 100 will be described. The battery remaining amount threshold value in each voice mode, that is, the call remaining time cannot be secured in the current voice mode, so the value of the remaining battery level that needs to be switched to another voice mode is expressed by the following formula ( 1).

  (Battery remaining amount [Wh]) = (Talking time [h]) × (Power consumption [W]) + (Battery remaining amount value [Wh] when battery remaining amount is 0%) 1)

  For example, consider the case where the value of the remaining battery level when the remaining battery level is 0% is 10 [Wh] shown in FIG. At this time, assuming that the available call time specified by the user is 1 [h], the remaining battery level when the voice mode is mode 1 is obtained as in the following equation (2).

  Battery level = 1 [h] × 2 [W] +10 [Wh] = 12 [Wh] (2)

  From the above equation (2), in order to secure a callable time of 1 [h] when the voice mode is mode 1, the remaining battery value is 12 [Wh] (the remaining battery ratio is 70 [%]) or more. It turns out that it is necessary. In other words, it can be seen that when the battery remaining rate is less than 70%, the voice mode is mode 1 and the callable time cannot be secured to 1 [h]. Accordingly, the call power processing unit 100 switches the remaining battery value = 12 [Wh] (remaining battery ratio = 70 [%]) from mode 1 to another voice mode (for example, mode 2). It is determined that the remaining battery level is reached.

  Similarly, when the remaining battery level when the remaining battery level is 0% is 10 [Wh] and the callable time specified by the user is 1 [h], the remaining battery level in each voice mode is When the amount threshold is calculated, the remaining battery level in mode 2 is obtained by the following equation (3), the remaining battery amount in mode 3 is obtained by the following equation (4), and the remaining battery amount in mode 4 is obtained by the following equation (5).

  Battery level = 1 [h] × 1.1 [W] +10 [Wh] = 11.1 [Wh] (3)

  Battery level = 1 [h] × 0.5 [W] +10 [Wh] = 10.5 [Wh] (4)

  Battery level = 1 [h] × 0.2 [W] +10 [Wh] = 10.2 [Wh] (5)

  From the above formulas (3) to (5), the call power processing unit 100 uses the remaining battery level threshold in mode 2 as the remaining battery level threshold for securing 1 [h] of the callable time in each voice mode. The value is 11.1 [Wh] (battery remaining ratio is 40 [%]). In mode 3, the battery remaining value is 10.5 [Wh] (battery remaining ratio is 20 [%]). 4, the value of the remaining battery level is 10.2 [Wh] (the remaining battery rate is 10 [%]).

  FIG. 2C is a voice mode change table in which the remaining battery level thresholds in the respective voice modes determined by the call power processing unit 100 calculating the remaining battery level are associated with each other. Thus, in the audio mode change table, the remaining battery level threshold value (indicated by the remaining battery rate in FIG. 2C) when switching the respective audio modes is associated. When the call power processing unit 100 acquires the value of the remaining battery level of the battery unit 31 from the power management unit 30, the call power processing unit 100 refers to the voice mode change table shown in FIG. Thus, the current voice mode is instructed to be changed to a voice mode suitable for the remaining battery level of the battery unit 31.

  The callable time can be specified by the user as described above, but a predetermined callable time can also be set in the terminal device 1.

  Next, a method for changing the voice mode in the terminal device 1 according to the first embodiment will be described. FIG. 3 is a flowchart illustrating a mode change processing procedure according to the first embodiment. The mode change process of the first embodiment shown in FIG. 3 is a process when the voice mode is changed so that the terminal device 1 operates in a voice mode suitable for the remaining battery level of the battery unit 31. The storage unit 80 will be described assuming that the voice mode change table shown in FIG. Further, the description will be made assuming that the setting of the audio signal processing in each audio mode is stored in the storage unit 80.

  The voice mode change process (hereinafter referred to as “first voice change process”) according to the first embodiment is executed from the time when voice communication is started in the terminal device 1. When the first voice change process is executed, first, the power management unit 30 starts monitoring the remaining battery level of the battery unit 31 and outputs a remaining battery level notification to the call power processing unit 100. Then, the call power processing unit 100 receives the battery remaining amount notification output from the power management unit 30 (step S10).

  Subsequently, the call power processing unit 100 determines whether or not the remaining battery level of the battery unit 31 indicated in the remaining battery level notification output from the power management unit 30 is lower than the remaining battery level threshold in the current voice mode. Determination is made (step S11).

  When it is determined in step S11 that the remaining battery level of the battery unit 31 is lower than the remaining battery level threshold in the current voice mode (“YES” in step S11), the call power processing unit 100 sets the voice mode for performing voice communication. A voice mode change request is transmitted to the base station in order to change to a voice mode with low power consumption (for example, when the current voice mode is mode 1, mode 2 which is the next lower voice mode). (Step S12).

  In the transmission process of the voice mode change request to the base station in step S12, the call power processing unit 100 first outputs the setting value of the voice signal processing in the voice mode to be changed to the communication control unit 90, and the voice mode. Instructs transmission of the change request to the base station. Thereby, the communication control unit 90 controls the transmission unit 92 in the modem unit 91 to transmit a communication packet including a request signal for changing the voice mode and information on the set value of the voice signal processing in the voice mode to be changed. , Transmit to the base station. Here, in the communication packet transmitted from the modem unit 91, the type of the audio codec and the bit rate included in the audio signal processing setting value input from the call power processing unit 100 as the audio mode setting value information. Values and are included. Note that the voice mode change request to the base station can be made by, for example, an update (UPDATE) request that is a session change in the Session Initiation Protocol (SIP) for establishing communication with the base station. it can.

  Thereafter, the communication control unit 90 notifies the call power processing unit 100 of the reply information received from the base station in response to the request signal received by the receiving unit 93 in the modem unit 91. The call power processing unit 100 determines whether or not the reply information from the base station input from the communication control unit 90 indicates that the change of the voice mode is permitted (step S13).

  When it is determined in step S13 that the change of the voice mode is permitted (“YES” in step S13), the call power processing unit 100 outputs the set value of the voice signal processing in the voice mode to be changed to the call management unit 60. Instruct to change the voice mode. Thereby, the call management unit 60 changes the setting of the voice signal processing applied in the current voice communication to the input setting value of the voice mode. That is, the current audio codec type and bit rate value set in the audio processing unit 70 are set to the audio codec type and bit rate value included in the input value of the audio mode with low power consumption. (Step S14). Then, the call power processing unit 100 ends the first voice change process.

  On the other hand, when it is determined in step S13 that the change of the voice mode is not permitted (“NO” in step S13), the call power processing unit 100 determines that the current voice mode requested to be changed is the voice mode with the least power consumption. It is determined whether or not there is (step S15).

  When it is determined in step S15 that the voice mode has the least power consumption (“YES” in step S15), the call power processing unit 100 ends the first voice change process.

  On the other hand, when it is determined in step S15 that the voice mode has the least power consumption (“NO” in step S15), the call power processing unit 100 returns to step S12 and performs the processes from step S12 to step S15. repeat. That is, the call power processing unit 100 repeats the request for changing to another voice mode (for example, mode 3 which is the second lower voice mode) with less power consumption for the base station.

  If it is determined in step S11 that the remaining battery level of the battery unit 31 is not lower than the remaining battery level threshold in the current voice mode (“NO” in step S11), the call power processing unit 100 includes the power management unit 30. It is determined whether or not the remaining battery level of the battery unit 31 indicated in the remaining battery level notification output from the battery level exceeds the remaining battery level threshold in the current voice mode (step S16). Here, for example, it is determined whether or not the remaining battery level of the battery unit 31 has increased due to, for example, the battery unit 31 being charged.

  If it is determined in step S16 that the remaining battery level of the battery unit 31 does not exceed the remaining battery level threshold in the current voice mode (“NO” in step S16), the call power processing unit 100 performs the first voice change process. Exit.

  On the other hand, when it is determined in step S16 that the remaining battery level of the battery unit 31 has exceeded the remaining battery level threshold in the current voice mode (“YES” in step S16), the call power processing unit 100 performs a voice mode in which voice communication is performed. Is changed to a voice mode with a large amount of power consumption (for example, when the current voice mode is mode 2, the voice mode change request is sent to the base station). Transmit (step S17). Note that the transmission process of the voice mode change request to the base station in step S17 is the same as the process in step S12 except that the request content of the voice mode to be changed is different, and detailed description thereof is omitted.

  Thereafter, the call power processing unit 100 determines whether or not the reply information from the base station input from the communication control unit 90 indicates that the change of the voice mode is permitted (step S18).

  When it is determined in step S18 that the change of the voice mode is permitted (“YES” in step S18), the call power processing unit 100 instructs the call management unit 60 to change the voice mode, similarly to the process of step S14. . Thereby, the call management unit 60 changes the setting of the voice signal processing applied in the current voice communication to the set value of the voice mode in which the input power consumption is large (step S19). Then, the call power processing unit 100 ends the first voice change process.

  On the other hand, when it is determined in step S18 that the change of the voice mode is not permitted (“NO” in step S18), the call power processing unit 100 ends the first voice change process.

  As described above, in the first voice change process, the remaining battery level threshold that is required to switch the voice mode to secure the call time is calculated based on the power consumption for each voice mode. Then, in the first sound change process, the calculated battery remaining amount threshold value is compared with the battery remaining amount of the battery unit 31 monitored by the power management unit 30, and the battery remaining amount of the battery unit 31 becomes equal to the battery remaining amount threshold value. When the number is lower or higher, a voice mode change request is transmitted to the base station. Then, when the change of the audio mode is permitted from the base station, the current setting of the audio signal processing is changed to a set value corresponding to the remaining battery level of the battery unit 31. Thereby, in the terminal device 1, it can switch to the suitable audio | voice signal process according to the battery remaining charge of the battery part 31, and can perform audio | voice communication.

  In the first audio change process, the case where the base station is requested to change the value of the audio codec type and the bit rate has been described. However, it is also possible to request a change in the type of the voice codec and the value of the bit rate to the terminal device of the other party who is talking by voice communication. In this case, the processing procedure is such that the destination of the communication packet including the request signal for changing the voice mode and the information on the setting value of the voice signal processing in the first voice change processing is replaced by the partner terminal device.

  Moreover, the case where the 1st audio | voice change process was performed from the time when audio | voice communication was started in the terminal device 1, ie, when the user started a telephone call, was demonstrated. However, the first voice change process may be executed when the user is not talking. For example, it may be set to reduce power consumption in the voice codec before the user starts a call. Further, for example, when the remaining battery level of the battery unit 31 is changed due to charging of the battery unit 31, the setting of the audio signal processing changed during the call is further changed according to the remaining battery level of the battery unit 31. Or may be restored. Thereby, the terminal device 1 can perform an appropriate audio signal process according to the remaining battery level of the battery unit 31 from the initial stage when the call is started next.

<Second Embodiment>
Next, a power management method in the terminal device 1 according to the second embodiment will be described. The schematic configuration of the terminal device 1 in the second embodiment is the same as that of FIG. FIG. 4 is a flowchart illustrating a power management processing procedure according to the second embodiment. The power management process of the second embodiment shown in FIG. 4 (hereinafter referred to as “second voice change process”) is performed by the user of the terminal device 1 in accordance with the battery level of the battery unit 31 notified. This is a process for selecting (specifying) a voice mode based on the remaining call time information. Note that the power table is also stored in the storage unit 80 in the following description. However, the power table stored in the storage unit 80 in the second voice change process will be described more specifically than the power table stored in the storage unit 80 in the first voice change process. More specifically, a table (hereinafter referred to as a “mode table”) in which audio mode setting values such as a bit rate value when converting audio and power consumption are associated with each type of audio codec. It explains using.

The second voice change process is executed before voice communication is started in the terminal device 1, for example, when the user performs an operation on the terminal device 1. In the second voice change process, the call power processing unit 100 sets the voice mode by the user in advance. In advance setting of the voice mode, the call power processing unit 100 instructs the display control unit 40 to display a voice mode setting screen. As a result, the display control unit 40 displays the audio mode setting screen on the display 41 (step S20). In addition, it is desirable that the prior setting of the voice mode by the user is associated with, for example, an energy saving setting function in the terminal device 1.

  Subsequently, the call power processing unit 100 causes the power management unit 30 to detect the remaining battery level of the battery unit 31 and provides information (battery remaining amount notification) indicating the remaining battery level of the battery unit 31 detected from the power management unit 30. Obtain (step S21). Subsequently, the call power processing unit 100 acquires information on the voice mode selected by the user's operation from the operation detection unit 20 (step S22). More specifically, the type of audio codec selected by the user and information on the value of the bit rate are acquired from the operation detection unit 20.

  Subsequently, the call power processing unit 100 reads the power consumption value corresponding to the voice mode (bit rate value) selected by the user from the mode table stored in the storage unit 80 (step S23). The power consumption value is a value obtained by calculating or measuring in advance the power consumed when the voice codec operates at each bit rate.

  Here, an example of the mode table stored in the storage unit 80 will be described. FIG. 5 is a diagram illustrating an example of a table (mode table) in which setting values of voice (voice mode) and power consumption in power management according to the second embodiment are associated with each other. The mode table shown in FIG. 5 calculates or measures in advance the bit rate value for converting audio and the power consumed when the audio codec operates at this bit rate for each type of audio codec. Are associated with the power consumption values. FIG. 5A shows an example of a mode table in which the bit rate value and the power consumption value when the audio codec type is “AMR” are associated with each other, and FIG. 4 shows an example of a mode table in which a bit rate value and a power consumption value are associated with each other when the audio codec type is “EVS”. For example, in the AMR mode table shown in FIG. 5A, when the value of the bit rate is “6.7 [kbps]”, the power consumption when converting audio at the bit rate is “0. 52 [W] ". Further, for example, in the EVS mode table shown in FIG. 5B, when the bit rate value is “64 [kbps]”, the power consumption when converting audio at the bit rate is “2. 8 [W] ". As can be seen from FIGS. 5A and 5B, as the bit rate value decreases, the power consumption also decreases. Note that when the type of the audio codec is “AMR”, the power consumption when converting the audio at each bit rate is smaller than when the type of the audio codec is “EVS”.

  Each mode table shown in FIG. 5 shows an example in which the relationship between the bit rate value and the power consumption value is linear, but the actual bit rate value and the power consumption value are This relationship may not be linear depending on the type of audio codec.

  Subsequently, the call power processing unit 100 determines the current battery unit 31 based on the information indicating the remaining battery level of the battery unit 31 acquired from the power management unit 30 and the value of the power consumption read from the storage unit 80. The remaining call time corresponding to the remaining battery level, that is, the call available time in the terminal device 1 is estimated (step S24). Then, the call power processing unit 100 notifies the user of information on the estimated callable time (step S25). At this time, the call power processing unit 100 instructs the display control unit 40 to display a voice mode setting screen including information on the estimated callable time, whereby the voice mode including the information on the callable time is displayed on the display 41. Notify by displaying the setting screen. In addition, when notifying the user of the information of the callable time, it can be considered that the remaining battery level of the battery unit 31 is also shown. In this case, the remaining battery level of the battery unit 31 acquired from the power management unit 30 It is considered that it is easier for the user to recognize the remaining battery level if the remaining battery level is converted into information of the ratio [%] instead of indicating the value [Wh] information as it is.

  Here, a method for converting the information of the battery remaining amount value [Wh] of the battery unit 31 into the information of the ratio [%] will be described. FIG. 6 is a diagram illustrating an example of a method for converting the remaining battery level performed in the power management according to the second embodiment. The example illustrated in FIG. 6 is an example when the operating voltage of the terminal device 1 is 3.3 to 4.3 [V] and the battery capacity of the battery unit 31 is 3 [Ah]. As shown in FIG. 6, when the value of the remaining battery level of the battery unit 31 acquired from the power management unit 30 is 12.9 [Wh], the battery capacity of the battery unit 31 is 3 [Ah]. The output voltage of the battery unit 31 is 4.3 [V]. Since the output voltage of the battery unit 31 is the maximum value (= 4.3 [V]) of the operating voltage in the terminal device 1, the ratio of the battery remaining amount is 100 [%]. Similarly, when the value of the battery remaining amount of the battery unit 31 acquired from the power management unit 30 is 9.9 [Wh], the output voltage of the battery unit 31 is 3.3 [V], and the terminal device 1 Since the operating voltage is the minimum value (= 3.3 [V]), the remaining battery capacity is 0 [%]. From this, the output voltage = 0.1 [V] (the battery remaining amount value = 0.3 [Wh]) may correspond to 10 [%] of the remaining battery amount of the battery unit 31. I understand that. For this reason, for example, when the value of the remaining battery level is 10.8 [Wh], the output voltage is 3.6 [V], and the ratio of the remaining battery level is equivalent to 30 [%]. Become. Based on this concept, the remaining battery level is converted.

  In the example of the battery remaining amount conversion method shown in FIG. 6, the relationship between the output voltage [V] (may be the remaining battery value [Wh]) and the remaining battery ratio [%]. An example that is linear is shown. However, as described above, in an actual rechargeable battery (battery), the output voltage [V] suddenly decreases from a certain value (for example, about 3.7 [V]) about the battery remaining rate. Becomes larger. Therefore, it is desirable to consider the characteristics of the output voltage of the battery (battery) when converting the value [Wh] of the battery remaining amount into the ratio [%].

  Next, a method for estimating a callable time in the call power processing unit 100 will be described. The call power processing unit 100 can obtain a call available time by the following equation (6).

  (Available call time) = ((Battery level [Wh])-(Battery level value when battery level is 0% [Wh])) / (Power [W]) x 60 [minutes / hour] ... (6)

  For example, when the remaining battery rate is 30 [%] (that is, the remaining battery value is 10.8 [Wh]) and the audio codec type is “AMR”, the bit rate selected by the user Assuming that the value is “4.75 [kbps]”, the call time is obtained from the above equation (6) as the following equation (7).

  Callable time = (10.8 [Wh] −10 [Wh]) ÷ 0.46 [W] × 60 [minute / hour] = 130 [minute] (7)

  Further, for example, when the remaining battery rate is 30 [%] (that is, the remaining battery value is 10.8 [Wh]) and the audio codec type is “EVS”, the bit selected by the user Assuming that the rate value is “128 [kbps]”, the call time is obtained from the above equation (6) as the following equation (8).

  Callable time = (10.8 [Wh] −10 [Wh]) ÷ 3.6 [W] × 60 [minute / hour] = 13 [minute] (8)

  In step S25, the call power processing unit 100 notifies the user of information on the available call time estimated by the above equation (6). Here, an example of a voice mode setting screen for notifying the user of the estimated callable time information will be described. FIG. 7 is a diagram illustrating an example of a screen (speech mode setting screen displayed on the display 41) for notifying information of a callable time according to the remaining battery level in the power management of the second embodiment. In the example of the voice mode setting screen shown in FIG. 7, information on the ratio [%] representing the remaining battery level of the battery unit 31 is notified to the area F1, and the estimated call is possible in the areas F2-1 and F2-2. The case where time information is notified is shown. In the example of the voice mode setting screen shown in FIG. 7, information on the possible call time estimated by the above equation (8) = 13 [minutes] is notified to the region F2-1, and the above equation is displayed in the region F2-2. The case where the information of the possible call time estimated by (7) = 130 [minutes] is notified is shown.

  The user confirms the information of the ratio [%] indicating the remaining battery level of the battery unit 31 and the information on the callable time according to the remaining battery level, and sets another voice mode as necessary. Can be selected (specified). For example, in the example of the audio mode setting screen shown in FIG. 7, the user can set another audio mode (audio codec type and bit) by sliding the button B1 indicating the setting of the currently selected audio mode. (Setting with rate value) can be selected (specified).

  Returning to FIG. 4, the call power processing unit 100 determines whether another voice mode has been selected by an operation by the user (step S <b> 26). When it is determined in step S26 that the user has selected another voice mode (“YES” in step S26), the call power processing unit 100 returns to step S23 and repeats the processes from step S23 to step S26. That is, the call power processing unit 100 notifies information on a call possible time in another selected voice mode. For example, in the example of the audio mode setting screen shown in FIG. 7, when the user slides the button B1 and selects another audio mode setting, the call power processing unit 100 selects the type of the selected audio codec. Then, based on the value of the bit rate and the value of the bit rate, estimation (calculation) of the callable time is performed again, and information on the callable time currently notified on the voice mode setting screen is updated.

  On the other hand, when it is determined in step S26 that the user has not selected another voice mode, that is, the setting of the currently selected voice mode is the final voice mode setting by the user ("NO" in step S26). "), The call power processing unit 100 sends a request for changing the set value of the currently selected voice mode to the voice mode selected (designated) by the user in order to change the voice mode in voice communication. Transmit to the station (step S27). This audio mode setting value includes information on the type of audio codec and the bit rate value suitable for the current battery level of the battery unit 31. The transmission process of the voice mode change request to the base station in step S27 can be considered in the same manner as the voice mode change request process in step S12 in the first voice change process shown in FIG. Detailed description will be omitted.

  Thereafter, when a notification indicating that the change of the voice mode is permitted is input from the communication control unit 90, the call power processing unit 100 outputs the set value of the currently selected voice mode to the call management unit 60. Then, an instruction to change the voice mode is given (step S28). Note that the voice mode change process in step S28 can be considered in the same manner as the voice mode change instruction process in step S14 in the first voice change process shown in FIG. .

  As described above, in the second audio change process, the audio signal processing setting currently set in the audio processing unit 70 is changed to the audio mode setting value selected (designated) by the user. Thereby, in the terminal device 1, it can switch to the audio | voice mode which a user desires and can perform audio | voice communication.

  In the second voice change processing, the concept for requesting the other terminal device that is talking by voice communication to change the voice mode is the same as the first voice change process shown in FIG. is there.

<Third Embodiment>
Next, a power management method in the terminal device 1 according to the third embodiment will be described. The schematic configuration of the terminal device 1 in the third embodiment is the same as that of FIG. FIG. 8 is a flowchart showing a processing procedure of power management in the third embodiment. The power management process of the third embodiment shown in FIG. 8 (hereinafter referred to as “third voice change process”) is performed when a captured image is combined with the first voice change process shown in FIG. It is processing. That is, the third voice change process is a process in the case where the voice communication in the terminal device 1 is a video call in which voice and a captured image are combined. In the terminal device 1, when the voice communication is a video call, in addition to the request for changing the voice mode, image processing suitable for the remaining battery level of the battery unit 31, that is, the bit rate of the image codec in the camera control unit 50 (hereinafter referred to as the image codec bit rate) In order to distinguish it from the bit rate in the audio codec, the base station is also requested to change the value of “image bit rate”. In the following description, it is assumed that the image processing settings in the image codec are also managed by the call management unit 60. In the following description, it is assumed that the power table is already stored in the storage unit 80. However, the power table stored in the storage unit 80 in the third sound change process is different from the power table stored in the storage unit 80 in the first sound change process in the image bit rate information (image processing information). ) Is the added table. And in the terminal device 1 of 3rd Embodiment, as a table corresponding to the audio | voice mode change table memorize | stored in the memory | storage part 80 in a 1st audio | voice change process, for every battery residual amount calculated based on the electric power table In the following description, it is assumed that a table (hereinafter, this table is also referred to as “mode table”) in which the type of audio codec, the bit rate value, the image bit rate value, and the like are associated is stored in the storage unit 80. In the terminal device 1 of 3rd Embodiment, based on this mode table, the change to the audio | voice mode and image mode suitable for the battery remaining charge of the battery part 31 is instruct | indicated.

  The third voice change process is executed from when the video call is started in the terminal device 1. When the third voice change process is executed, first, the call power processing unit 100 receives the battery remaining amount notification output from the power management unit 30 as in step S10 in the first voice change process (step S10). S30).

  Subsequently, the call power processing unit 100 sets the audio signal processing settings applied in the current audio communication from the call management unit 60, that is, the type and bit rate of the audio codec set in the audio processing unit 70. Information (hereinafter referred to as “audio mode information”) and the current image processing settings, that is, information relating to the image codec set in the camera control unit 50 (hereinafter referred to as “image mode information”). Each is acquired (step S31). Here, the image mode information includes, for example, the setting of image processing performed on the image information of the subject input from the camera 51, the bit rate value at which the camera 51 captures an image, and whether the image is transmitted in a video call. Whether or not (that is, ON or OFF of image transmission) is included.

  Subsequently, the call power processing unit 100 sets, from the mode table stored in the storage unit 80, the voice mode setting value corresponding to the remaining battery level of the battery unit 31 indicated in the acquired remaining battery level notification, and the image The mode setting value is read (step S32).

  Here, an example of the mode table stored in the storage unit 80 will be described. FIG. 9 is a diagram illustrating an example of a table (mode table) in which the remaining battery level in the power management according to the third embodiment is associated with setting values of sound (sound mode) and image (image mode). . The mode table shown in FIG. 9 includes the audio mode setting value of the audio codec type and the bit rate value, and the setting value of the image mode of the image bit rate for each predetermined percentage of the remaining battery level of the battery unit 31. Are associated with ON or OFF of the image. For example, in the mode table shown in FIG. 9, when the remaining battery level is “81 to 90 [%]”, the audio codec type = “EVS” and the bit rate value = “64 kilobits” are set as the audio mode settings. / Second (kbps) "is associated, and" image ON "is associated as the image mode setting. For example, in the mode table shown in FIG. 9, when the remaining battery level is “21 to 30 [%]”, the audio codec type = “AMR” and the bit rate value = “ “6.7 kilobits / second (kbps)” is associated, and “image ON” is associated as the image mode setting. For example, when the remaining battery level is “11 to 20%” in the mode table shown in FIG. 9, the audio codec type = “AMR” and the bit rate value = “ 5.15 kilobits / second (kbps) ”is associated, and“ image OFF ”is associated as the image mode setting. Thus, in the mode table, the remaining battery level is associated with the set values of the audio mode and the image mode so that the load of the audio signal processing and the image processing decreases as the remaining battery level decreases. Yes. Thereby, in the terminal device 1, when the battery remaining in the battery unit 31 is small, voice communication can be performed with a small amount of power consumption, and the call time can be secured. Further, in the terminal device 1, when the remaining battery level of the battery unit 31 is still smaller, image transmission is not performed even in a video call, that is, the power consumption is further reduced by switching to a voice call, and the call time is reduced. Can be secured.

  In the third embodiment as well, as in the first embodiment, the user designates the callable time and the remaining battery for switching the setting values of the voice mode and the image mode in order to secure the designated callable time. An audio mode change table in which the amount threshold is calculated based on the power table is stored in the storage unit 80, and a change to a setting value suitable for the remaining battery level of the battery unit 31 is instructed with reference to the audio mode change table. it can.

  Returning to FIG. 8, the call power processing unit 100 compares the voice mode information and the image mode information acquired from the call management unit 60 with the set values of the voice mode and the image mode read from the storage unit 80. More specifically, the call power processing unit 100 includes the audio codec type included in the audio mode information acquired from the call management unit 60 and the audio codec type included in the audio mode setting value read from the storage unit 80. And compare. Further, the call power processing unit 100 compares the bit rate value included in the voice mode information acquired from the call management unit 60 with the bit rate value included in the voice mode setting value read from the storage unit 80. . The call power processing unit 100 compares the image processing setting included in the image mode information acquired from the call management unit 60 with the image processing setting included in the image mode setting value read from the storage unit 80. That is, the information regarding the image codec is compared. Then, the call power processing unit 100 determines whether or not the voice mode information and the image mode information acquired from the call management unit 60 match the set values of the voice mode and the image mode read from the storage unit 80. (Step S33).

  When it determines with each compared in step S33 matching ("YES" of step S33), the telephone call power process part 100 returns to step S30, and repeats the process from step S30 to step S33. On the other hand, if it is determined in step S33 that the comparisons do not match (“NO” in step S33), the call power processing unit 100 sets the audio mode and image mode in the video call to the current remaining battery level of the battery unit 31. A change request for changing to the sound mode and the image mode suitable for the transmission is transmitted to the base station (step S34). Note that the transmission process of the voice mode and image mode change request to the base station in step S34 is the same as that in step S12 in the first voice change process shown in FIG. 3 except that the setting value of the image mode is added. Since it can be considered in the same manner as the processing for changing the voice mode, a detailed description is omitted.

  Thereafter, when a notification indicating that the change of the voice mode and the image mode is permitted is input from the communication control unit 90, the call power processing unit 100 reads the voice mode read from the storage unit 80 into the call management unit 60. Each of the set value and the set value of the image mode is output, and an instruction to change the sound mode and the image mode is given (step S35). Note that the sound mode and image mode change processing in step S35 is also changed according to the set value of the image mode, except that the sound mode change in step S14 in the first sound change processing shown in FIG. Since it can be considered in the same manner as the instruction processing, detailed description is omitted.

  As described above, in the third audio change process, the audio mode information and the image mode information acquired from the call management unit 60 are compared with the set values of the audio mode and the image mode read from the storage unit 80, and the comparison is performed. When the results are different, a request for changing the audio mode and the image mode is transmitted to the base station. When the base station permits the change of the audio mode and the image mode, the current setting of the audio signal processing and the image processing is changed to a setting corresponding to the remaining battery level of the battery unit 31. Thereby, in the terminal device 1, it can switch to the suitable audio | voice signal processing and image processing according to the battery remaining charge of the battery part 31, and can perform audio | voice communication (video call).

  In the third voice change process, the concept for requesting the terminal device of the other party who is talking by video call to change the voice mode and the image mode is the same as the first voice change process shown in FIG. It is the same. Further, the concept of the timing for starting the third voice change process is the same as that of the first voice change process shown in FIG. Further, the idea of the third voice change process can be applied to the second voice change process shown in FIG.

  As described above, according to the embodiment for carrying out the present invention, the remaining battery level of the battery (battery) included in the terminal device is successively monitored (monitored), and the voice is based on the monitored remaining battery level. Change the settings of the audio codec and image codec so that less power is consumed when the codec and image codec operate. Thereby, in the form for implementing this invention, even if it is during a telephone call, the audio | voice signal process in the audio | voice communication in a terminal device or the image process in a video call is appropriate according to the battery remaining charge of a battery (battery). You can switch to processing. Thereby, in the form for implementing this invention, the low power consumption of a terminal device is realizable even during a telephone call. That is, in the mode for carrying out the present invention, as in the conventional power-saving technology in the mobile communication terminal, not only when the user is not talking during a call but during a call, Even when talking, the amount of battery usage can be reduced.

  The embodiment of the present invention has been described above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes various modifications within the scope of the present invention. It is.

  The present invention can be used for a terminal device that performs voice communication such as a mobile phone and a smartphone.

DESCRIPTION OF SYMBOLS 1 ... Terminal device, 10 ... Terminal control part, 20 ... Operation detection part, 30 ... Power management part, 31 ... Battery part (battery), 40 ... Display control part (display) Part), 41 ... display (display part), 50 ... camera control part (image processing part), 51 ... camera (photographing part), 60 ... call management part (voice communication part), 70 ... Sound processing unit (voice communication unit, voice processing unit), 71 ... Microphone (voice communication unit, voice processing unit), 72 ... Speaker (voice communication unit, voice processing unit), 73 ... Receiver (voice communication unit, voice processing unit), 80 ... storage unit, 90 ... communication control unit (voice communication unit, communication unit), 91 ... modem unit (voice communication unit, communication unit), 92 ... Transmission unit (voice communication unit, communication unit), 93 ... Reception unit (voice communication unit, communication unit), 100 ... Telephone call Processing unit

Claims (5)

A voice communication unit that performs voice communication via a mobile communication network;
A power management unit that monitors the amount of power stored in the battery and outputs a battery remaining amount notification indicating the remaining battery amount of the monitored battery;
The voice in the voice mode suitable for the battery remaining amount of the battery represented in the battery remaining amount notification based on a table in which the voice mode and power consumption in the voice communication prepared in advance are associated with each other. A call power processing unit that instructs the voice communication unit to change to communication;
A terminal device comprising: The voice communication unit is
A communication unit for transmitting and receiving communication packets to and from the mobile communication network;
An audio processing unit that performs audio signal processing on audio data;
Comprising
The call power processing unit
When the voice communication is changed to the voice mode suitable for the remaining battery level of the battery, the communication unit includes a communication packet including a request signal for requesting the voice mode to be changed and information related to the voice mode. When the base station sends a reply indicating that the change to the voice mode is permitted, the voice processing unit sends the current voice signal processing to the base station of the mobile communication network. Instructing to change to the audio signal processing corresponding to the audio mode;
The terminal device according to claim 1. The call power processing unit
Based on the table, a threshold for the remaining battery level that needs to be switched in order to secure the call time is calculated, and the remaining battery level threshold is associated with the voice mode to be switched. Generate a change table,
The change table is
For each threshold value of the remaining battery level, the type of audio codec when the audio processing unit performs the audio signal processing is associated with the value of the bit rate when the audio data is converted by the audio codec. Table,
The call power processing unit
When the audio signal processing setting value including the type of the audio codec and the bit rate value as information regarding the audio mode is transmitted to the communication unit, and the change of the audio mode is permitted, the audio processing Instructing the current audio signal processing setting of the unit to be changed to the type of the transmitted audio codec and the value of the bit rate;
The terminal device according to claim 2. The table is
For each type of audio codec when the audio processing unit performs the audio signal processing, a bit rate value for converting the audio data and power consumption when the audio codec operates at the bit rate value Is a table associated with
The call power processing unit
Based on the remaining battery level of the battery indicated in the battery level notification, the remaining call time during which the voice communication can be performed in the designated voice mode is estimated, and the estimated call time is represented. When the display unit is instructed to display information and finally the audio mode is designated, the audio signal processing setting including the audio codec type and the bit rate value as the audio mode information is provided. When the value is transmitted to the communication unit and the change of the audio mode is permitted, the current audio signal processing setting of the audio processing unit is changed to the type of the transmitted audio codec and the bit rate. Instruct to do,
The terminal device according to claim 2. The voice communication is
Communication that combines sound and captured images,
The voice communication unit is
An image processing unit that generates image data obtained by performing image processing on information of an image captured by the imaging unit;
Further comprising
The table is
A table in which image mode information when the image processing unit performs the image processing is further associated for each predetermined battery remaining amount,
The call power processing unit
When changing to the voice mode suitable for the remaining battery level of the battery of the voice communication, the communication unit, the communication packet further including the information of the image mode is transmitted to the base station of the mobile communication network, Instructing the image processing unit to change the current image processing to the image processing corresponding to the image mode when there is a reply from the base station indicating that the change to the image mode is permitted To
The terminal device according to claim 3 or claim 4.

Images