JP3674451B2 - Portable device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a portable device provided with music reproducing means, and is particularly suitable for application to an automobile phone or a cellular phone.
[0002]
[Prior art]
A mobile phone device carried by the user in a mobile phone system such as a PDC (Personal Digital Cellular telecommunication system) known as an analog cellular system or a digital cellular system, or in a simple mobile phone system (PHS: Personal Handyphone System) When there is an incoming call, a ring tone is emitted to notify the user of the incoming call. As this ringing tone, a beep sound has been conventionally emitted. However, since the beep sound is annoying, it has recently been changed to a melody sound instead of a beep sound.
[0003]
[Problems to be solved by the invention]
A conventional cellular phone device capable of reproducing a melody sound is provided with a music reproducing means capable of performing automatically. This music reproducing means generally includes a central processing unit (CPU), a ROM (Read Only Memory), a RAM (Random Access Memory), a sound source, and the CPU executes an automatic performance program stored in the ROM. Thus, the music data stored in the ROM or RAM is read, and the music is reproduced by setting the sound generation parameters for the sound source.
In order to reproduce high-quality musical sounds, recent music reproducing means can reproduce music composed of a plurality of parts.
[0004]
Such a mobile phone device is required to be small and lightweight so that it is convenient to carry. Therefore, it is impossible to increase the occupied volume of the battery that is the power source of the mobile phone device.
However, when performing the reproduction operation of a plurality of parts in the music reproducing means, there is a problem in that the power consumption is large because high-speed processing is performed, and the battery is consumed quickly.
[0005]
Therefore, an object of the present invention is to provide a portable device that can suppress battery consumption as much as possible even if it has music playback means that can play back music composed of a plurality of parts.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the portable device of the present invention comprises a music playback means capable of playing back a music composed of a plurality of parts, a power supply means comprising a battery for supplying power to the music playback means, and the remaining power supply means. Control means for detecting the amount and controlling the music reproducing means, and when the control means detects that the remaining power of the power supply means is reduced, the control means is reproduced by the music reproducing means. It controls to reduce the number of parts.
Further, in the portable device of the present invention, the music reproducing means can reproduce a music composed of a plurality of parts by including a plurality of musical tone synthesizing units, and the control means reduces the remaining amount of the power supply means. When detecting that, the control means may reduce the number of the plurality of musical tone synthesizing units that provide the music data.
[0007]
Furthermore, in the portable device of the present invention, the music reproducing means can reproduce a music composed of a plurality of parts by including a plurality of musical tone synthesis units, and the control means reduces the remaining amount of the power supply means. When detecting that, the control means may reduce the number of the plurality of tone synthesizing units that supply power from the power supply means.
Furthermore, in the portable device of the present invention, when the control means detects that the remaining amount of the power supply means is reduced, the control means is configured to reproduce only the melody part by the music reproduction means. You may make it control.
[0008]
Furthermore, in the portable device of the present invention, the music reproducing means can reproduce a music composed of a plurality of parts by including a plurality of musical tone synthesizing units, and the control means has a remaining amount of the power supply means. When the reduction is detected, the control means may give the music data only to the tone synthesis unit that reproduces the melody part of the plurality of tone synthesis units.
Furthermore, in the portable device of the present invention, the music reproducing means can reproduce a music composed of a plurality of parts by including a plurality of musical tone synthesizing units, and the control means has a remaining amount of the power supply means. When the reduction is detected, the control means may supply power from the power supply means only to the tone synthesis section that reproduces the melody part of the plurality of tone synthesis sections.
[0009]
According to the present invention as described above, when it is detected that the remaining amount of the battery is reduced, the control means is controlled to reduce the number of parts reproduced by the music reproducing means. It will be possible to suppress as much as possible. In addition, when the remaining amount of the battery is large, the musical sounds of all the parts are reproduced, so that high quality musical sounds can be reproduced.
Further, when it is detected that the remaining amount of the battery has been reduced, if the control means makes the part reproduced by the music reproducing means only the melody part, the power consumption can be reduced and the reproduced musical sound can be reduced. The influence of quality degradation can be reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a configuration example of an embodiment when the mobile device of the present invention is applied to a mobile phone.
A cellular phone 1 shown in FIG. 1 includes a generally retractable antenna 1a, and the antenna 1a is connected to a communication unit 13 having a modulation / demodulation function. A central processing unit (CPU) 10 for the system is a system control unit that controls the operation of each unit of the mobile phone 1 by executing a telephone function program, and indicates an elapsed time during operation or specifies a specific time. A timer that generates a timer interrupt at the time interval is provided. Further, the system CPU 10 performs a process for assisting the music reproduction process when a process for power saving or an interrupt request signal (IRQ) is received. The system RAM 11 is a RAM (Random Access Memory) in which a music data storage area composed of a plurality of parts downloaded from a download center or the like, a user setting data storage area, a work area of the system CPU 10, and the like are set. The system ROM 12 is a ROM (Read Only Memory) in which various types of data such as various telephone function programs executed by the system CPU 10 and programs for assisting the music reproduction process and processes such as preset music data are stored. is there.
[0011]
The communication unit 13 demodulates a signal received by the antenna 1a, modulates a signal to be transmitted, and supplies the modulated signal to the antenna 1a. The received signal demodulated by the communication unit 13 is decoded by the voice processing unit (coder / decoder) 14, and the call signal input from the microphone 21 is compressed and encoded by the voice processing unit 14. The voice processing unit 14 performs high-efficiency compression coding / decoding of voice, and is, for example, a CELP (Code Excited LPC) system or ADPCM (adaptive differential PCM coding) coder / decoder. The music reproduction unit 15 emits the reception signal from the audio processing unit 14 from the reception speaker 22 or reproduces the music data and outputs it as a ringtone, a holding tone, BGM, and a musical tone for viewing. Note that the ringtone and the musical tone for viewing are emitted from the incoming speaker 23, and the hold tone and BGM are mixed with the incoming signal and emitted from the incoming speaker 22.
[0012]
The music data is composed of a plurality of parts, and includes tone color parameters and sequence data of each part. When the music reproducing unit 15 reproduces the music data, if a predetermined amount of empty area is generated in the sequence data storage means provided therein, the music reproducing unit 15 sends an interrupt request signal ( IRQ) is given to the system CPU 10, and the system CPU 10 reads out the continuation of the sequence data stored in the system RAM 11 or the system ROM 12 and transfers it to the music reproducing unit 15. The interface (I / F) 16 is an interface for downloading music data composed of a plurality of parts from an external device 20 such as a personal computer. The input unit 17 is an input unit that includes dial buttons and various buttons “0” to “9” provided in the mobile phone 1.
[0013]
Further, the display unit 18 is a display that displays a menu corresponding to a telephone function menu or a button operation such as a dial button. The vibrator 19 is a vibrator that informs the user of an incoming call by vibrating the main body of the mobile phone 1 instead of a ringtone when receiving an incoming call. The battery 25 is a rechargeable battery that supplies power to each unit constituting the mobile phone 1, and the voltage of the battery 25 is constantly monitored by the battery voltage level detection unit 24. When the battery voltage level detection unit 24 detects that the voltage level of the battery 25 has decreased below the reference value, the battery voltage level detection unit 24 controls the music playback unit 15 to reduce the number of parts to be played, thereby suppressing the power consumption of the battery 25. doing. For example, by controlling so that only the melody part is reproduced, the operating time by the battery 25 can be extended. Each functional block exchanges data and commands via the bus 26.
[0014]
Next, the first configuration of the music playback unit 15 in the mobile phone 1 shown in FIG. 1 is shown in FIG. 2, but before that, the first music data played back by the music playback unit 15 having the first configuration is shown in FIG. FIG. 4A shows the format of FIG. 4, and FIG. 4B shows the second format of the music data.
The music data of the first format shown in FIG. 4A shows an example of music data of music number 1 (No. 1). The music data of the music number 1 is composed of four parts, part 1 (melody part), part 2 (accompaniment part 1), part 3 (accompaniment part 2) and part 4 (rhythm part), and each part is a tone of the part. It consists of parameters and sequence data. The sequence data in each part is configured by alternately arranging sounding interval data (duration data) and sounding data like the sequence data in Part 1 illustrated. Furthermore, the sound generation data is composed of a key code indicating the pitch and a gate time indicating the sound generation length. The music data in the first format does not necessarily need to include four parts, part 1 (melody part), part 2 (accompaniment part 1), part 3 (accompaniment part 2), and part 4 (rhythm part). What is necessary is just to have two or more parts.
[0015]
The music data in the second format is shown in FIG. 4B. Here, the music data of the music number 1 (No. 1) is shown. The music data of the music number 1 is composed of four parts of part 1 (melody part), part 2 (accompaniment part 1), part 3 (accompaniment part 2) and part 4 (rhythm part) as one sequence data. It is configured. Although a part of the sequence data is illustrated, the sequence data is configured by alternately generating sound generation interval data (duration data) and sound generation data. Furthermore, the sound generation data is configured by adding part specification information (flag) for specifying a part to a key code indicating a pitch and a gate time indicating a sound generation length. Although not shown, the timbre parameter of each part is written for each part at the beginning of the music data. The music data in the second format does not necessarily need to include four parts, part 1 (melody part), part 2 (accompaniment part 1), part 3 (accompaniment part 2), and part 4 (rhythm part). What is necessary is just to have two or more parts.
[0016]
The music reproducing unit 15 having the first configuration shown in FIG. 2 can reproduce the music data in the format shown in FIGS. In the music playback unit 15, an interface (I / F) 30 is an interface for transferring various data via the bus 26, and the music data received from the system CPU 10 is a write / read controller (R / W controller) 31. The power save data received from the battery voltage level detection unit 24 is supplied to the power save control unit 36.
The write / read controller (R / W controller) 31 is a controller that controls the writing / reading of sequence data to / from the temporary storage unit (T • RAM), and manages the read position and the write position. . In other words, the sequence data constituting the music data supplied from the interface 30 is written in the temporary storage unit (T • RAM), and the temporary storage unit (T) in accordance with the read request signal (Req) from the sequencer 33. Sequence data is sequentially read from the RAM 32 and supplied to the sequencer 33.
[0017]
In the initial setting of the music data, the write / read controller (R / W controller) 31 writes the tone parameters of each part supplied from the interface 30 to the write / read controller (R / W controller) 31 and the sequencer. 33 is set to any one of the first musical tone synthesis unit 34a to the fourth musical tone synthesis unit 34d of the corresponding part. Furthermore, a predetermined amount of sequence data is stored in an empty area of the temporary storage unit (T • RAM) 32 under the control of the write / read controller (R / W controller) 31 at the initial setting of the music data. The
The sequencer 33 receives the sequence data of each part read by the write / read controller (R / W controller) 31, and the first musical tone synthesis units 34a to 34a of the parts corresponding to the sound source parameters based on the sequence data. It is set in one of the four musical tone synthesis units 34d. Next, the sound reproduction is started by any one of the first musical tone synthesis unit 34a to the fourth musical tone synthesis unit 34d corresponding to the part after waiting for the sound generation timing. The sound source parameters are pitch data, volume data, and the like.
[0018]
A musical tone synthesis unit comprising a first musical tone synthesis unit 34a (melody part), a second musical tone synthesis unit 34b (accompaniment part 1), a third musical tone synthesis unit 34c (accompaniment part 2), and a fourth musical tone synthesis unit 34d (rhythm part). Is configured to be able to play back 4 parts of music at the same time. When the music data is initially set, the first musical tone synthesis unit 34a (melody part), the second musical tone synthesis unit 34b (accompaniment part 1), the third musical tone synthesis unit 34c (accompaniment part 2), and the fourth musical tone synthesis unit. In 34d (rhythm part), the timbre parameter of each part supplied from the interface 30 is set. When the reproduction of the musical sound is started, the musical sound data of each part is reproduced based on the control of the sequencer 33.
The musical tone data reproduced by the first musical tone synthesizing unit 34a to the fourth musical tone synthesizing unit 34d are synthesized by the mixer 35, converted into an analog musical tone signal, and output from the music reproducing unit 15.
[0019]
When the power save control unit 36 receives from the interface 30 the power save data output when the battery voltage level detection unit 24 outputs the voltage level of the battery 25 equal to or lower than the reference value, the power save control unit 36 performs a power save mode setting process. Set to mode. And the power consumption of the battery 25 is suppressed by controlling to reduce the number of parts to be reproduced. Control may be made so that only the reproduction of the melody part is performed with the number of reproduction parts in the power save mode as one part. In order to perform such power saving control, the sequencer 33, the first musical tone synthesis unit 34a (melody part), the second musical tone synthesis unit 34b (accompaniment part 1), the third musical tone synthesis unit 34c (accompaniment part 2), Switching means SW1 to SW4 are provided between the fourth musical tone synthesis unit 34d (rhythm part).
[0020]
In the power save mode, some of the switch means SW1 to SW4 are opened under the control of the power save control unit 36, and data such as sound source parameters necessary for reproduction is not supplied from the sequencer 33 to the tone synthesis means. It becomes like this. For example, when the switch means SW2 to SW4 are opened except for the switch means SW1, data necessary for reproduction of the melody part is supplied from the sequencer 33 to the first musical tone synthesis unit 34a, and only the melody part is reproduced. However, the data necessary for reproducing the accompaniment part 1, the accompaniment part 2 and the rhythm part is not supplied from the sequencer 33 to the second tone synthesis unit 34b to the fourth tone synthesis unit 34d, and the accompaniment part 1, the accompaniment part 2 and the rhythm part are not supplied. Will not play. Thereby, the electric power consumed by the 2nd musical tone synthesizing part 34b-the 4th musical sound synthesizing part 34d can be reduced, and the electric power consumption of the battery 25 can be suppressed.
[0021]
Next, the playback operation of the music playback unit 15 shown in FIG. 2 will be described below assuming that the music data in the first format shown in FIG.
When the system CPU 10 issues a reproduction start instruction, the start instruction is given to the sequencer 33 to start reproduction. When the system CPU 10 issues a playback start instruction, when the BGM or the musical tone playback for viewing is started by operating the playback key on the mobile phone 1, the incoming call notification is received and the ringtone (ringtone melody) is played back. Is started. Also, when the reproduction of the hold sound is started by operating the hold operation key, the system CPU 10 issues a reproduction start instruction. The system CPU 10 sends music data selected in advance to the music playback unit 15 for each use (incoming call, BGM, music for appreciation, hold) that causes the start of the playback instruction when the playback start instruction is given.
[0022]
At this time, a predetermined amount of sequence data from the beginning of the sequence data of each part in the selected music data is transferred from the system CPU 10 to the temporary storage unit (R / W controller) 31 under the control of the write / read controller (R / W controller) 31. T.RAM). Further, the timbre parameters of each part are set in the corresponding musical tone synthesis units of the first musical tone synthesis unit 34a to the fourth musical tone synthesis unit 34d via the write / read controller (R / W controller) 31 and the sequencer 33. Become so.
[0023]
Next, in response to a read request signal (Req) from the sequencer 33, the R / W controller 31 sequentially reads the sequence data of each part from the temporary storage unit (T • RAM) 32 and supplies it to the sequencer 33. The storage capacity of the temporary storage unit (T / RAM) 32 is smaller than the storage capacity necessary for storing the sequence data for one song. For example, each part has a storage capacity for storing 32 words of song data. Has been. The sequencer 33 sequentially reads the sequence data from the R / W controller 31, interprets the sequence data, and sets the sound source parameters corresponding to the sequence data to correspond to the first tone synthesis unit 34a to the fourth tone synthesis unit 34d. It is set in the musical tone synthesis section of the part. The sequencer 33 waits until the sound generation timing, and starts the tone reproduction of the tone synthesis unit of the corresponding part of the first tone synthesis unit 34a to the fourth tone synthesis unit 34d. Further, when the end time of the pronunciation length in the sequence data is reached, the sequencer 33 ends the tone reproduction of the corresponding tone synthesis unit of the first tone synthesis unit 34a to the fourth tone synthesis unit 34d. In this way, the four-part musical tone data reproduced from the first musical tone synthesizing unit 34a to the fourth musical tone synthesizing unit 34d are respectively output, synthesized by the mixer 35, and converted into analog musical tone signals.
[0024]
Here, when the mobile phone 1 is set to be played back by the music playback unit 15 when an incoming call is received, the music playback process described above is performed when the mobile phone 1 receives the incoming call. The musical tone signal that has been performed and converted into an analog signal is emitted from the incoming speaker 23 as a ringtone. In addition, when the mobile phone 1 is put on hold, if the music playback unit 15 is set to play the music as a hold sound, the music playback process described above is performed when the mobile phone 1 is put on hold. The musical sound signal converted into an analog signal is emitted from the receiving speaker 22 as a holding sound. At the same time, this musical tone signal is supplied to the voice processing unit 14 and transmitted to the other party via the communication unit 13 in order to transmit the hold tone to the other party's telephone. Further, if the music playback unit 15 is set to play back the music as BGM or music for viewing when the playback key is operated on the mobile phone 1, the above operation is performed when the playback key is operated. The musical tone signal that has been subjected to the music reproduction process and converted into an analog signal is emitted from the receiving speaker 22 or the incoming speaker 23 as BGM or a viewing musical tone.
[0025]
By the way, the voltage level of the battery 25 that supplies power to each unit including the music reproducing unit 15 is constantly monitored by the battery voltage level detecting unit 24. When the battery voltage level detector 24 detects that the voltage level of the battery 25 has fallen below the reference value, the battery voltage level detector 24 sends the power save data to the power save controller 36 via the bus 26 and the interface 30. Notice. When the power save control unit 36 receives the power save data output from the battery voltage level detection unit 24, the power save control unit 36 performs a power save mode setting process to set the power save mode. Then, the switch means SW1 to the switch means SW4 are controlled so as to reduce the number of parts to be reproduced and reduce the power consumption of the battery. The number of reproduction parts at this time can be an arbitrary number, and the number of reproduction parts may be gradually reduced according to the degree of decrease in the voltage level of the battery 25. Further, when the number of playback parts is reduced, control is performed so that only the melody part is played and only the switch means SW1 is closed.
[0026]
When the power save mode is set, a display to that effect is displayed on the display unit 18 of the cellular phone 1, and some of the switch means SW1 to SW4 are opened under the control of the power save control unit 36, Data required for reproduction supplied from the sequencer 33 is not supplied to the musical tone synthesizing means. Therefore, although the part whose switch means is opened is not reproduced, it is controlled so that only the reproduction of the melody part which is a highly important part is performed. Thereby, the electric power consumed by the 1st musical sound synthesizing part 34a-the 4th musical sound synthesizing part 34d can be reduced, and the electric power consumption of the battery 25 can be suppressed.
[0027]
In the initial setting process executed when the system CPU 10 issues a reproduction start instruction when no musical sound is reproduced in the music reproducing unit 15 when the power save mode is set, the switch means SW1 to switch means SW1. SW4 open / close control is performed. Thereby, the number of parts to be reproduced is reduced. In this case, since the music data is in the first format and individually configured for each part, the music data of the part to be reproduced by the system CPU 10 during the initial setting process may be sent to the music reproducing unit 15. Good. Further, since the sequence data is written in the temporary storage unit (T • RAM) 32 for each part, only the music data of the part to be reproduced by the write / read controller (R / W controller) 31 is selected and temporarily stored. The data may be written in the unit (T • RAM) 32.
[0028]
When the sequence data is read from the temporary storage unit (T • RAM) 32, the read sequence data is erased from the temporary storage unit (T • RAM). Then, as the reproduction of the sequence data proceeds, a predetermined amount of empty area is generated in the temporary storage unit (T • RAM) 32. Therefore, when a predetermined amount of empty area occurs, the write / read controller (R / W controller) 31 notifies the system CPU 10 of an interrupt request signal (IRQ). When the interrupt request signal (IRQ) is notified, the system CPU 10 reads and writes the sequence data for the predetermined sequence data, for example, when the empty area is for 16 words from the system RAM 11 or the like. The data is written in the temporary storage unit (T • RAM) under the control of the read controller (R / W controller) 31. By repeating such an operation, even if the storage capacity of the temporary storage unit (T • RAM) 32 is smaller than the storage capacity necessary for storing the sequence data for one song, the entire song can be reproduced. Will be able to. Such sequence data is written to the temporary storage unit (T • RAM) for each part.
[0029]
When the music playback unit 15 having the first configuration shown in FIG. 2 plays back the music data of the second format shown in FIG. 4B, a sequence in which the parts are mixed in the temporary storage unit (T • RAM).・ Data will be written. Therefore, the sequencer 33 detects the part of the read sequence data, and sets a sound generation parameter based on the sequence data in the musical tone synthesis unit of the detected part. Thereafter, by performing the same operation as that for reproducing music data in the first format, a maximum of 4 parts of musical sounds are reproduced. Since the operation is the same as that in reproducing the music data in the first format, the description thereof is omitted. Since the operation when the power save mode is set is the same, the description thereof is omitted.
In the initial setting process executed when the system CPU 10 issues a playback start instruction when no musical sound is played back by the music playback unit 15 when the power save mode is set, the switch means SW1 to SW1. A process for reducing the number of parts to be reproduced by controlling the opening and closing of SW4 is performed.
[0030]
In the music reproducing unit 15 having the first configuration described above, the first musical tone synthesis unit 34a to the fourth musical tone synthesis unit 34d may be configured by one musical tone synthesis unit that performs time-division operation. In such a configuration, one switch means SW is provided between one musical tone synthesizer that performs time-division operation and the sequencer 33, and the power save control unit 36 reproduces the part to be reproduced. Control is performed to turn on the switch means SW in accordance with the timing at which the sequencer 33 outputs necessary data.
[0031]
Next, FIG. 3 shows a second configuration of the music playback unit 15 in the mobile phone 1 shown in FIG.
The music reproducing unit 15 having the second configuration shown in FIG. 3 can reproduce the music data in the format shown in FIGS. The music playback unit 15 having the second configuration is different from the music playback unit 15 having the first configuration in the configuration in which the power supply to the four tone synthesis units is controlled in the power save mode. For this reason, the switch means is not provided, but other configurations are the same.
Therefore, the description of the music reproducing unit 15 having the second configuration will be described below assuming that the music data in the second format is reproduced.
[0032]
When the system CPU 10 issues a reproduction start instruction, the start instruction is given to the sequencer 33 to start reproduction. When the system CPU 10 issues a playback start instruction, when the BGM or the musical tone playback for viewing is started by operating the playback key on the mobile phone 1, the incoming call notification is received and the ringtone (ringtone melody) is played back. Is started. Also, when the reproduction of the hold sound is started by operating the hold operation key, the system CPU 10 issues a reproduction start instruction. The system CPU 10 sends music data selected in advance to the music playback unit 15 for each use (incoming call, BGM, music for appreciation, hold) that causes the start of the playback instruction when the playback start instruction is given.
[0033]
At this time, a predetermined amount of sequence data from the beginning of the sequence data in which the parts of the selected music data are mixed is temporarily transferred from the system CPU 10 under the control of the write / read controller (R / W controller) 31. It is written in the storage unit (T • RAM). Furthermore, the timbre parameters of each part are set in the corresponding musical tone synthesis units of the first musical tone synthesis unit 134a to the fourth musical tone synthesis unit 134d via the write / read controller (R / W controller) 31 and the sequencer 33. Become so.
[0034]
Next, in response to a read request signal (Req) from the sequencer 33, the R / W controller 31 reads sequence data in which each part is sequentially mixed from the temporary storage unit (T • RAM) 32 and supplies the sequence data to the sequencer 33. To do. The storage capacity of the temporary storage unit (T / RAM) 32 is smaller than the storage capacity necessary for storing the sequence data for one song, and is a storage capacity capable of storing, for example, 32 words of song data. . The sequencer 33 sequentially reads the sequence data from the R / W controller 31, interprets the sequence data, and sets the sound source parameters corresponding to the sequence data to correspond to the first tone synthesis unit 134a to the fourth tone synthesis unit 134d. It is set in the musical tone synthesis section of the part. The sequencer 33 waits until the sound generation timing and starts playing the musical sounds of the corresponding musical tone synthesis units of the first musical tone synthesis unit 134a to the fourth musical tone synthesis unit 134d. Further, when the end time of the pronunciation length in the sequence data is reached, the sequencer 33 ends the tone reproduction of the corresponding tone synthesis unit of the first tone synthesis unit 134a to the fourth tone synthesis unit 134d. In this way, the four-part musical tone data reproduced from the first musical tone synthesizing unit 134a to the fourth musical tone synthesizing unit 134d are respectively output, synthesized by the mixer 35, and converted into analog musical tone signals.
[0035]
Here, when the mobile phone 1 is set to be played back by the music playback unit 15 when an incoming call is received, the music playback process described above is performed when the mobile phone 1 receives the incoming call. The musical tone signal that has been performed and converted into an analog signal is emitted from the incoming speaker 23 as a ringtone. In addition, when the mobile phone 1 is put on hold, if the music playback unit 15 is set to play the music as a hold sound, the music playback process described above is performed when the mobile phone 1 is put on hold. The musical sound signal converted into an analog signal is emitted from the receiving speaker 22 as a holding sound. At the same time, this musical tone signal is supplied to the voice processing unit 14 and transmitted to the other party via the communication unit 13 in order to transmit the hold tone to the other party's telephone. Further, if the music playback unit 15 is set to play back the music as BGM or music for viewing when the playback key is operated on the mobile phone 1, the above operation is performed when the playback key is operated. The musical tone signal that has been subjected to the music reproduction process and converted into an analog signal is emitted from the receiving speaker 22 or the incoming speaker 23 as BGM or a viewing musical tone.
[0036]
By the way, the voltage level of the battery 25 that supplies power to each unit including the music reproducing unit 15 is constantly monitored by the battery voltage level detecting unit 24. When the battery voltage level detector 24 detects that the voltage level of the battery 25 has fallen below the reference value, the battery voltage level detector 24 sends the power save data to the power save controller 136 via the bus 26 and the interface 30. To notify.
When the power save control unit 136 receives the power save data output from the battery voltage level detection unit 24, the power save control unit 136 performs a power save mode setting process to set the power save mode. Then, the power supplied to the first musical tone synthesis unit 134a to the fourth musical tone synthesis unit 134d is controlled so as to reduce the number of parts to be reproduced and reduce power consumption. In this case, the number of playback parts can be set to an arbitrary number, and the number of playback parts is gradually reduced by controlling the number of musical tone synthesizing units that supply power according to the degree of decrease in the voltage level of the battery 25. It may be. Further, when the number of playback parts is reduced, control is performed so that power is supplied only to the first tone synthesis unit 134a so that only the melody part is played.
[0037]
When the power save mode is set, the display unit 18 of the cellular phone 1 displays a message to that effect, and is controlled by the power save control unit 136 so that the number of the first tone synthesis unit 134a to the fourth tone synthesis unit 134d is increased. The power supply to the musical tone synthesis unit is stopped. Therefore, the music synthesizer whose power supply has been stopped will not be played back, but only the melody part, which is a highly important part, is played back. Power should be supplied constantly. Thereby, the electric power consumed by the 2nd musical sound synthesizing part 134b-the 4th musical sound synthesizing part 134d to which electric power is not supplied can be reduced, and the electric power consumption of the battery 25 can be suppressed.
In addition, in the power saving mode, if no musical sound is reproduced in the music reproduction unit 15, musical composition that supplies power is performed in the initial setting process that is executed when the system CPU 10 issues a reproduction start instruction. A process for reducing the number of reproduced parts by selecting a part is performed.
[0038]
Since the operation of the R / W controller 31 notifying the system CPU 10 of the interrupt request signal (IRQ) is as described above, the description thereof is omitted. By the way, in the music reproducing means having the second configuration shown in FIG. 3, when the music data of the first format shown in FIG. 4A is reproduced, the sequence for each part is stored in the temporary storage unit (T • RAM). • Data is written. Therefore, the sequencer 33 detects the part of the sequence data from the read position, and sets a sound generation parameter based on the sequence data in the musical tone synthesis unit of the detected part. Thereafter, by performing the same operation as that for reproducing music data in the second format, a maximum of 4 parts of musical sounds are reproduced. However, since the operation is the same as the case of reproducing music data in the second format, the description thereof is omitted.
[0039]
In addition, in the power saving mode, if no musical sound is reproduced in the music reproduction unit 15, musical composition that supplies power is performed in the initial setting process that is executed when the system CPU 10 issues a reproduction start instruction. A process for reducing the number of reproduced parts by selecting a part is performed.
[0040]
In the music reproducing unit 15 having the second configuration described above, the first musical tone synthesis unit 134a to the fourth musical tone synthesis unit 134d may be configured by one musical tone synthesis unit that performs time-division operation. In such a configuration, the power save control unit 136 controls the power supply to the musical tone synthesis unit that performs time-division operation according to the timing at which the sequencer 33 outputs data necessary for reproduction of the part to be reproduced. To do.
[0041]
Note that, in the music playback unit 15 having the first configuration and the music playback unit 15 having the second configuration, the sequencer 33 is the sequence data of which part the sequence data read from the temporary storage unit (T / RAM) 32 is. The sound source parameters based on the sequence data are set in the musical tone synthesis unit of the corresponding part. Then, by supplying a control signal from the power save control unit 36 to the sequencer 33, data necessary for reproduction is selectively supplied to the first tone synthesis unit 34a (134a) to the fourth tone synthesis unit 34d (134d). Will be able to. That is, the number of parts to be played back can be controlled by selectively supplying data necessary for playing back to the 4-part musical tone synthesizer by the sequencer 33. Thereby, switch means SW1-switch means SW4 in the 1st composition can be omitted. In addition, since no power is consumed in the musical tone synthesizing unit to which data necessary for reproduction is not supplied from the sequencer 33, the power supply means to the musical tone synthesizing unit in the second configuration can be omitted.
[0042]
In the music reproducing unit 15 described above, the number of parts to be reproduced can be reduced even when the power saving mode is set during reproduction in the music reproducing unit 15, so that the power consumption of the battery 25 can be suppressed. it can. When the battery voltage level detection unit 24 outputs the power save data during reproduction, the power consumption of the battery 25 is not suppressed, and the music data format is only the first format shown in FIG. If so, the configuration of the music playback unit 15 can be simplified.
That is, in the initial setting process executed when the system CPU 10 issues a playback start instruction, the music of the part that is played back according to the power save mode and the normal mode among the music data individually configured for each part Only the data is sent from the system CPU 10 to the music reproducing unit 15. In this case, only the part based on the music data sent from the system CPU 10 is reproduced, so that no other configuration is required for power saving. Further, instead of this, only the music data of the part to be reproduced by the write / read controller (R / W controller) 31 may be written in the temporary storage unit (T • RAM) 32. Also in this case, only the part based on the music data written in the temporary storage unit (T • RAM) 32 is reproduced, so that no other configuration is required for power saving.
[0043]
Next, FIG. 5 shows a flowchart of the power save mode setting process that is started when the power save control unit 36 receives the power save data or when the user operates the power save switch.
When the power save mode setting process is activated, it is determined in step S1 whether or not the power save switch (PS switch) is turned on. If the user turns on the PS switch, the power save register (PS register) is inverted in step S2. If the user does not turn on the PS switch, step S2 jumps to step S3, where it is determined whether the battery voltage is equal to or lower than the reference value n. If power save data indicating that the battery voltage of the battery 25 is below the reference value n is notified from the battery voltage level detection unit 24, the process proceeds to step S4 and the PS register is set to “1”. Is done. Further, when the power save data is not notified from the battery voltage level detection unit 24, the process of step S4 is skipped.
[0044]
In step S5, it is determined whether or not the PS register is "1". If the PS register is inverted to "1" in step S2, and if the PS register is "1" in step S4. If "", the determination is YES, "power save mode" is displayed on the display unit 18 in step S6, and the power save mode setting process ends. If the PS register is not determined to be “1” in step S5, “normal mode” is displayed on the display unit 18 in step S7, and the power save mode setting process ends.
In step S2, the PS register can be inverted every time the user operates the PS switch, and the power save mode and the normal mode can be arbitrarily selected. However, if the battery voltage of the battery 25 is equal to or lower than the reference value n, the PS register is always set to “1” in step S4, and the power save mode is set.
[0045]
Next, FIG. 6 shows a flowchart of incoming call processing (first method) executed when an incoming call is received. However, this incoming call processing (first method) is a case where the music data format is the first format shown in FIG.
When there is an incoming call to the cellular phone 1 and the incoming call processing is activated, the incoming call is detected in step S11, and it is determined in step S12 whether or not the PS register is set to “1”. Here, if the power save mode is set and the PS register is set to “1”, the process proceeds to step S13, and initial setting of the music data for the power save mode (PS mode) is performed. In the initial setting process of the PS mode music data, only the part 1 sequence data in the music data selected as the ringing melody is sent to the music playback unit 15 and is sent to the temporary storage unit (T • RAM) 32. Written. Also, the timbre parameter of part 1 is set in the first musical tone synthesis unit 34a (134a). Furthermore, processing for selecting and reproducing only part 1 (melody part) is executed. Specifically, only the switch means SW1 placed in front of the first musical tone synthesis unit 34a is turned on. Alternatively, power is supplied only to the first musical tone synthesis unit 134a.
[0046]
If the normal mode is set and the PS register is set to “0”, the process branches to step S14 to initialize the normal mode music data. In this normal mode music data initial setting process, the music data selected as the incoming melody is sent to the music playback section 15 and the sequence data is written to the temporary storage section (T • RAM) 32. In addition, the timbre parameters of each part are set in the first tone synthesis unit 34a (134a) to the fourth tone synthesis unit 34d (134d), respectively. Further, processing for reproducing all the parts 1 to 4 is executed. Specifically, all of the switch means SW1 to SW4 provided in front of the first musical tone synthesis unit 34a to the fourth musical tone synthesis unit 34d are turned on. Alternatively, power is supplied to all of the first musical tone synthesis unit 134a to the fourth musical tone synthesis unit 134d. Next, in step S15, an instruction to start playing the incoming melody is given to the music playback unit 15, and the sequencer 33 reads the sequence data written in the temporary storage unit (T • RAM) 32 and is selected in step S13. The sound generation parameters are set in all of the first musical tone synthesis unit 34a (134a) or the first musical tone synthesis unit 34a (134a) to the fourth musical tone synthesis unit 34d (134d), and reproduction is started. As a result, the incoming melody is reproduced and emitted from the incoming speaker 23.
[0047]
When the user operates the connection button while listening to the incoming melody emitted from the incoming speaker 23, it is determined in step S16 that the line has been connected, and the process proceeds to step S17. In step S17, a playback stop instruction is supplied to the music playback unit 15 to stop the incoming melody, and all the flags and data in the music playback unit 15 are cleared. At this time, the temporary storage unit (T • RAM) 32 is also cleared. Then, a call process and other processes are performed so that the other party can make a call, and the incoming call process ends. Since the process does not proceed to step S17 until the user operates the connection button, the incoming melody continues to be emitted during that time.
[0048]
Next, FIG. 7 shows a flowchart of the incoming call processing (second method) when the music data format is the second format shown in FIG.
When there is an incoming call to the mobile phone 1 and the incoming call process is activated, the incoming call is detected in step S21, and the music data is initialized in step S22. In the music data initial setting process, the music data selected as the incoming melody is sent to the music playback section 15 and written to the temporary storage section (T • RAM) 32. In addition, the timbre parameters of each part are set in the first musical tone synthesis unit 34a to the fourth musical tone synthesis unit 34d, respectively. Next, in step S23, it is determined whether or not the PS register is set to “1”. Here, when the power save mode is set and the PS register is set to “1”, the process proceeds to step S24 to instruct the power save control unit 36 (136) of the music playback unit 15 to perform the power save control. send. In response to this, the power save control unit 36 (136) executes processing for selecting and reproducing only part 1 (melody part), for example. Specifically, only the switch means SW1 placed in front of the first musical tone synthesis unit 34a is turned on. Alternatively, power is supplied only to the first musical tone synthesis unit 134a.
[0049]
If the normal mode is set and the PS register is set to “0”, the process jumps to step S24 and proceeds to step S25, where an instruction to start playing the incoming melody is given to the music playing unit 15 and the sequencer 33 reads out the sequence data written in the temporary storage unit (T • RAM) 32 and starts reproduction of the music data. In this case, when the process of step S24 is executed in the power save mode, only the first musical tone synthesis unit 34a (134a) performs reproduction, the normal mode is set, and the process of step S24 is skipped. In this case, all of the first musical tone synthesis unit 34a (134a) to the fourth musical tone synthesis unit 34d (134d) perform reproduction. As a result, the incoming melody is reproduced and emitted from the incoming speaker 23.
[0050]
When the user listens to the incoming melody emitted from the incoming speaker 23 and operates the connection button, it is determined in step S26 that the line is connected, and the process proceeds to step S27. In step S27, a playback stop instruction is supplied to the music playback unit 15 to stop the incoming melody, and all the flags and data in the music playback unit 15 are cleared. At this time, the temporary storage unit (T • RAM) 32 is also cleared. Then, a call process and other processes are performed so that the other party can make a call, and the incoming call process ends. Since the process does not proceed to step S27 until the user operates the connection button, the incoming melody continues to be emitted during that time.
[0051]
In the cellular phone 1 to which the above-described portable device of the present invention is applied, the system CPU 10 performs a telephone function process (not shown) as a main process, and plays back sequence data according to an interrupt request signal (IRQ). Even if the music reproduction assisting process written in the unit 15 is executed together, the music reproduction assisting process is a light process, so that it is not necessary to use a high-speed CPU as the system CPU 10.
The storage capacity of the temporary storage unit (T • RAM) 32 is set to a capacity capable of storing sequence data for 32 words. However, the storage capacity is not limited to this, and the storage capacity may be much smaller than that of the system RAM 11. .
Furthermore, by connecting the mobile phone 1 to which the mobile device of the present invention is applied to the distribution center, desired music data can be downloaded from the distribution center to the system RAM 11.
The mobile device of the present invention is not applied only to the above-described mobile phone, but is applied to a mobile device including a music playback unit such as an information device including a music playback unit or a personal computer including a music playback unit. Can do.
[0052]
【The invention's effect】
In the present invention, as described above, when it is detected that the remaining amount of the battery is reduced, the control unit is controlled to reduce the number of parts reproduced by the music reproducing unit. It will be possible to suppress as much as possible. In addition, when the remaining amount of the battery is large, the musical sounds of all the parts are reproduced, so that high quality musical sounds can be reproduced.
Further, when it is detected that the remaining amount of the battery has been reduced, if the control means makes the part reproduced by the music reproducing means only the melody part, the power consumption can be reduced and the reproduced musical sound can be reduced. The influence of quality degradation can be reduced.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration example of an embodiment when a mobile device of the present invention is applied to a mobile phone.
FIG. 2 is a diagram showing a first configuration of a music reproducing unit in the mobile phone according to the embodiment of the present invention.
FIG. 3 is a diagram showing a second configuration of the music reproducing unit in the mobile phone according to the embodiment of the present invention.
FIG. 4 is a diagram showing a first format and a second format of music data in the mobile phone according to the embodiment of the present invention.
FIG. 5 is a flowchart of a power save mode setting process in the mobile phone according to the embodiment of the present invention.
FIG. 6 is a flowchart of incoming call processing (first method) in the mobile phone according to the embodiment of the present invention;
FIG. 7 is a flowchart of incoming call processing (second method) in the mobile phone according to the embodiment of the present invention;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mobile phone, 1a antenna, 10 system CPU, 11 system RAM, 12 system ROM, 13 communication part, 14 audio processing part, 15 music reproduction part, 17 input part, 18 display part, 19 vibrator, 20 external apparatus, 21 microphone , 22 Speaker for reception, 23 Speaker for incoming call, 24 Battery voltage level detection unit, 25 Battery, 26 Bus, 30 interface, 31 Write / read controller (R / W controller), 32 Temporary storage unit (T / RAM), 33 sequencer, 34a first musical tone synthesis unit, 34b second musical tone synthesis unit, 34c third musical tone synthesis unit, 34d fourth musical tone synthesis unit, 35 mixer, 36 power save control unit, 134a first musical tone synthesis unit, 134b second Tone synthesis unit, 134c Third tone synthesis unit, 134d Fourth tone synthesis unit, 136 Sebu control unit

Claims (6)

A music playback means capable of playing music composed of multiple parts;
Power supply means comprising a battery for supplying power to the music playback means;
Control means for controlling the music playback means by detecting the remaining amount of the power supply means,
When the control means detects that the remaining amount of the power supply means is reduced, the control means controls to reduce the number of parts reproduced by the music reproduction means. The music playback means is provided with a plurality of musical sound synthesizers so that a music composed of a plurality of parts can be played back, and when the control means detects that the remaining amount of the power supply means is reduced, the control means a portable device according to claim 1, wherein the reducing the number of the plurality of tone synthesis section that gives the music data. The music playback means is provided with a plurality of musical sound synthesizers so that a music composed of a plurality of parts can be played back, and when the control means detects that the remaining amount of the power supply means is reduced, the control means a portable device according to claim 1, wherein the reducing the number of the plurality of tone synthesis portion for supplying power from said power supply means. When said control means detects that the remaining amount of the power supply unit has decreased, the control means according to claim 1, wherein only the melody part by said music reproducing means and controlling to be played Mobile devices. The music playback means is provided with a plurality of musical sound synthesizers so that a music composed of a plurality of parts can be played back, and when the control means detects that the remaining amount of the power supply means is reduced, the control means a portable device according to claim 1, characterized in that only so as to provide the music data to the tone synthesis portion for reproducing the melody part of the plurality of tone synthesis portion. The music playback means is provided with a plurality of musical sound synthesizers so that a music composed of a plurality of parts can be played back, and when the control means detects that the remaining amount of the power supply means is reduced, the control means a portable device according to claim 1, wherein only the musical tone synthesizing unit for reproducing the melody part of the plurality of tone synthesis portion is adapted to supply power from said power supply means.

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