JP2005099833A - Musical sound reproducing device and mobile terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the time spent for tone color change processing even when tone color parameters are stored in a general-purpose storage means. <P>SOLUTION: A CPU 10 registers a tone color parameter group consisting of an arbitrary number of parameters read out from a RAM 11, in a sound source memory 30 being a general memory. Tone color parameters which a sound source core 33 requires when reproducing musical sounds are stored in a cache memory 32 for all channels, When the CPU 10 gives a tone color change instruction to a control part 31, designated tone color parameters are read out from the sound source memory 30. Then the tone color parameters of a designated channel in the cache memory 32 are rewritten with the read-out tone color parameters. Thus the sound source core 33 reads tone color parameters set to respective channels, from the cache memory 32 to reproduce musical sounds, so that musical sounds with changed tone colors can be reproduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a musical tone reproducing apparatus that can be applied to a mobile terminal device and can be changed in tone color.

As an example of a conventional music sound reproducing apparatus, there is a music sound reproducing apparatus that generates music using hardware. In such a musical tone reproducing apparatus, the tone color of the musical tone to be reproduced can be changed.
An example of the configuration of this musical tone reproducing apparatus is shown in FIG. 10, and the explanation for changing the timbre will be given below. In FIG. 10, a CPU (Central Processing Unit) 110 reads sequence data such as MIDI (Musical Instrument Digital Interface) data and SMAF (Synthetic Music Mobile Application Format) data from a RAM (Random Access Memory) 111, and generates sound source hardware. To the unit 115. The tone generator hardware unit 115 reproduces the supplied sequence data and outputs a musical sound signal to the speaker 134. The tone generator hardware unit 115 includes a timbre parameter storage area 130 and a data processing unit 133 for reproducing music. The timbre parameter storage area 130 is composed of areas and registers secured in a RAM (Random Access Memory).

  In the musical tone reproducing apparatus configured as described above, when changing the timbre of the musical tone to be reproduced, the CPU 110 gives a timbre change command to the timbre parameter storage area 130, and the timbre parameter to be changed read out from the RAM 111 by the CPU 110. Is written in the timbre parameter storage area 130. When the musical tone reproduction timing is reached, the data processing unit 133 reads the changed timbre parameter from the timbre parameter storage area 130 and reproduces the musical tone having the changed timbre using the timbre parameter. The RAM 111 can store many sequence data and timbre parameter groups.

  In the conventional musical tone reproducing apparatus, when changing the timbre, the timbre parameter to be changed by the CPU 110 is read from the RAM 111 and transferred to the tone generator hardware section 115 as described above. In this case, since the data bus width of the tone generator hardware unit 115 is about 8 bits, the RAM and registers constituting the timbre parameter storage area 130 are also limited to about 8 bits. However, the timbre parameter for one channel required when the data processing unit 133 reproduces the sound of one channel has a bit number as many as several tens of bits. Therefore, in the 8-bit RAM or register, the data processing unit 133 has to read the timbre parameters necessary for reproducing the sound of one channel in a plurality of times by 8 bits. As a result, there is a problem that it takes a processing time to read the timbre parameters from the timbre parameter storage area 130 and set them in the data processing unit 133.

  When processing takes a long time to set in the data processing unit 133, the sound is cut off. To solve this, the operating speed of the RAM or register constituting the timbre parameter storage area 130 can be increased. Conceivable. However, if the operating speed of the RAM or register is increased, the power consumption increases, and this becomes a fatal drawback when the music playback device is mounted on a battery-operated portable terminal. . Further, every time the timbre is changed, the CPU 110 has to transfer the timbre parameter to be changed from the RAM 111 to the sound source hardware unit 115, and the data transfer amount between the sound source hardware unit 115 and the CPU 110 increases. There was also. Furthermore, if the timbre parameter storage area 130 is configured by a dedicated register, an arbitrary number of registers can be read simultaneously, but the timbre parameter storage area 130 becomes a timbre parameter dedicated area and has an 8-bit width other than the timbre parameter. If the data is shared with general-purpose data, the memory use efficiency deteriorates. Furthermore, if the timbre parameter storage area 130 is constituted by a RAM having a large bit width, a timbre parameter having a large bit width can be read at a time, but the timbre parameter storage area 130 becomes a dedicated timbre parameter area, and the timbre parameter is stored. If it is shared with general-purpose data having a width of 8 bits other than parameters, the problem arises that the memory use efficiency deteriorates in this case as well.

  Therefore, the present invention provides a musical tone reproducing apparatus capable of shortening the time spent for the timbre change processing even if the timbre parameters are stored in the general-purpose storage means, and a portable terminal device including such a musical tone reproducing apparatus. It is intended to provide.

  In order to achieve the above object, a musical tone reproducing apparatus according to the present invention includes a general-purpose storage means capable of registering at least an arbitrary number of timbre parameter groups, a tone generator means for reproducing musical sounds based on set timbre parameters, and a timbre A cache memory having a large output data width for transferring parameters to the sound source means, and when changing the timbre set in the sound source means, the timbre parameters of the timbre to be changed are stored in the general-purpose storage means. The timbre parameters to be changed are transferred from the cache memory to the tone generator means.

Further, in the musical tone reproducing apparatus of the present invention, the system control means whose main processing is processing other than the musical tone reproduction processing outputs a timbre change instruction, whereby the timbre parameter specified by the timbre change instruction is the general-purpose storage means. From the cache memory and transferred to the cache memory, and the designated timbre parameter may be transferred from the cache memory to the tone generator means.
Further, in the musical tone reproducing apparatus of the present invention, the designation of the timbre parameter in the timbre change command may be the start address of the timbre parameter to be changed in the general-purpose storage means.

  Next, a portable terminal device of the present invention capable of achieving the above object is a portable terminal device including the above-described music sound reproducing device, wherein the system control means executes the portable terminal function process as a main process. Has been made.

According to the present invention, since the general-purpose storage means capable of registering an arbitrary number of timbre parameter groups and the cache memory having a large output data width are provided, the general-purpose storage means can be used when changing the timbre. The read-designated tone color parameter may be transferred to the cache memory. In this case, since the timbre parameter group consisting of an arbitrary number is registered in the general-purpose storage means, it is possible to minimize the need to transfer the timbre parameters from the system control unit to the general-purpose storage means each time the timbre is changed. Further, since the output bit width of the cache memory is increased, the timbre parameter can be immediately set in the sound source means. As described above, even if the timbre parameters are stored in the general-purpose storage means, the time spent for the timbre change process can be shortened, and it is possible to prevent the sound from being cut off when the timbre is changed.
Further, since the timbre changing process is performed by sending the head address of the timbre parameter to be changed in the general-purpose storage means, the system control means can reduce the data transfer amount between the system control means and the musical tone reproducing apparatus.

FIG. 1 shows a configuration example of an embodiment when the portable terminal device of the present invention including the musical sound reproducing device of the present invention is applied to a mobile phone.
A mobile phone 1 shown in FIG. 1 includes an antenna 25 that is generally made retractable, and can be connected to the base station 2 through a wireless line. The antenna 25 is connected to the communication unit 13 having a modulation / demodulation function. A central processing unit (CPU) 10 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 the operation or a specific time interval. It has a timer that generates a timer interrupt. Further, the CPU 10 transfers the sequence data to the sound source hardware unit 15 by a predetermined amount at the time of playing a musical sound such as when an incoming call is received. A RAM 11 is a RAM (Random Access Memory) in which a storage area for sequence data downloaded from a download center or the like connected via the base station 2 and a work area for the CPU 10 are set. The ROM 12 is a ROM (Read Only Memory) in which various data such as various telephone function programs executed by the CPU 10 and programs such as processing related to musical sound reproduction and preset sequence data are stored.

  In addition, the communication unit 13 demodulates a signal received by the antenna 25, modulates a signal to be transmitted, and supplies the modulated signal to the antenna 25. 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 includes, for example, a CELP (Code Excited LPC) system and an ADPCM (adaptive differential PCM coding) coder / decoder. The tone generator hardware unit 15 can generate and output a ringing melody and a holding tone by emitting a reception signal from the voice processing unit 14 from the reception speaker 22 or reproducing sequence data. The incoming melody is emitted from the incoming speaker 23, and the hold tone is mixed with the incoming signal and emitted from the incoming speaker 22.

  Also, the sequence data format is set to MIDI (Musical Instrument Digital Interface) format or SMAF (Synthetic Music Mobile Application Format) convenient for distribution, and the tone generator hardware unit 15 converts the sequence data of these formats to tone generator hardware. It is converted into control data in a format unique to the sound source core built in the unit 15 and reproduced. Alternatively, the CPU 10 may convert the sequence data into control data having a format unique to the sound source hardware unit 15 and store it in the RAM 11, read out from the RAM 11 during reproduction, and supply it to the sound source hardware unit 15. The tone generator hardware unit 15 is provided with a general-purpose RAM for registering an arbitrary number of tone color parameter groups, a cache memory having a large output bit width, and a tone generator core. The timbre parameter group registered in the general-purpose RAM is, for example, the GM tone generator standard timbre parameter group. The cache memory stores the timbre parameters of the timbre specified for each channel, and the tone generator core is for one channel necessary for reproducing the musical sound in the channel by one or several slight accesses from the cache memory. The timbre parameters can be read out.

  Further, the interface (I / F) 16 is an interface for downloading sequence data and the like 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. The display unit 18 is a display that displays a menu corresponding to a telephone function 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. Each functional block exchanges data and the like via the bus 24.

Next, FIG. 2 shows a configuration of a musical sound reproducing device in the mobile phone 1 according to the embodiment of the present invention. However, in FIG. 2, the receiving speaker 22 and the incoming speaker 23 are shown as the speaker 34 and the configuration is omitted. Although not shown in the figure, the CPU 10 and the tone generator hardware unit 15 or RAM 11 exchange data via a bus 24.
In the musical tone reproducing apparatus of the present invention shown in FIG. 2, the RAM 11 stores sequence data and timbre parameters of various timbres. For example, a GM sound source standard timbre parameter group stored in the RAM 11 is transferred to and registered in the sound source memory 30 of the sound source hardware unit 15 under the control of the CPU 10. When registering a timbre parameter group in the tone generator memory 30, the CPU 10 gives a timbre parameter transmission command a to the RAM 11 to sequentially read out the timbre parameters in the timbre parameter group to be registered, and the read timbre parameter b is sent to the tone generator memory 30. Supplied. At the same time, the CPU 10 gives a timbre parameter write command (tone color parameter registration to the memory) c to the control unit 31. In response to this, the control unit 31 generates an address for writing the timbre parameter b in the sound source memory 30 and gives a timbre parameter write command d to the sound source memory 30. As a result, the timbre parameter a read from the RAM 11 is written in a predetermined area of the sound source memory 30. The CPU 10 stores a timbre parameter table in which the head address of each timbre parameter registered in the sound source memory 30 is written in the work area of the RAM 11.

  When changing the tone color of the musical tone reproduced by the tone generator core 33, the CPU 10 gives a tone color change command c to the control unit 31. Upon receiving this tone color change command c, the control unit 31 provides the tone generator parameter 30 with a tone color parameter transmission command d for transmitting the designated tone color parameter to the cache memory 32. As a result, the tone generator memory 30 reads the designated timbre parameter and transmits the read timbre parameter e to the cache memory 32. Although not shown in the figure, the tone generator core 33 at the time of musical tone reproduction requests a timbre parameter read request when the reproduction timing is reached, based on control data in a format specific to the tone generator core 33 obtained by converting the sequence data supplied from the control unit 31. h is given to the cache memory 32. Receiving this, the cache memory 32 sends the read tone color parameter g to the sound source core 33. In this case, the output bit width of the cache memory 32 is, for example, a bit width that can send the timbre parameter g for one channel at a time, and the timbre parameter can be immediately set in the sound source core 33. As a result, the sound source core 33 reproduces the musical tone having the changed timbre using the changed timbre parameter, sends the reproduction data i to the speaker 34, and emits the musical tone.

Next, the operation for changing the timbre will be described in more detail with reference to FIGS. 3 is a diagram showing the detailed configuration of the tone generator memory 30, the control unit 31, and the cache memory 32 in the tone generator hardware unit 15. FIG. 4 shows the timbre parameters registered in the tone generator RAM 30a constituting the tone generator memory 30. FIG. 5 is a diagram showing a data configuration example of a group, and FIG. 5 is a diagram showing a data configuration example of timbre parameters stored in a timbre cache memory 32 a constituting the cache memory 32.
In the configuration shown in FIG. 3, the tone color parameter write command c from the CPU 10 is given to the tone generator memory address generation circuit 31a, and an address for writing the tone color parameter to be registered is generated and given to the address input terminal of the tone generator RAM 30a. The tone generator RAM 30a is a general-purpose memory having an input bit width and an output bit width of, for example, 8 bits. When the timbre parameter write command c from the CPU 10 is given, the timbre parameter transmission command a is given from the CPU 10 to the RAM 11, the timbre parameter to be registered is read out, and the timbre parameter b is read from the data input terminal of the tone generator RAM 30a. Is given to. Therefore, the timbre parameter b is sequentially written at address positions sequentially given from the sound source memory address generation circuit 31a. In this case, an arbitrary number of tone color parameters, for example, all tone color parameters of the GM tone generator standard can be written in the tone generator RAM 30a. The head address at which each timbre parameter is written to the tone generator RAM 30a is given to the tone generator memory address generation circuit 31a by the CPU 10 in the timbre parameter write command c, and a timbre parameter table in which the head address of each timbre parameter is written is stored in the RAM 11. The

The data structure of the timbre parameter group registered in the sound source RAM 30a is as shown in FIG. 4, for example. That is, the bit width of the tone generator RAM 30a is 8 bits, the timbre parameter 1 is stored in the address “1000h (h is a hexadecimal number)” to the address “100Fh”, and the timbre parameter 2 is stored in the address “1100h” to the address “110Fh”. And timbre parameter 3 is stored at addresses “2FF0h” to “2FFFh”. Each timbre parameter is stored in, for example, a 16-row × 8-bit area in which addresses are continuous. Therefore, each timbre parameter is divided into at most 8 bits each time an incremented address is given from the tone generator memory address generation circuit 31a. Is written into the sound source RAM 30a. In this way, in the example shown in FIG. 4, one timbre parameter is divided into 16 bits and is registered in the sound source RAM 30a within 16 bits. The timbre parameters registered in the sound source RAM 30a are a timbre parameter group including a timbre parameter 1 to a timbre parameter m (m is an arbitrary integer). The timbre parameters shown in FIG. 4 are timbre parameters for the FM sound source, and the timbre parameters are SR (sustain rate), ERB (reverb on / off), SUS (sustain level), RR (release rate), DR. (Decay rate),..., WS (waveform selection), FB (feedback level), and other parameters.
Note that a predetermined tone color parameter group is stored in advance in the tone generator ROM 30b, and the data configuration thereof is the same as the data configuration example shown in FIG.

  Further, the tone color change instruction c output from the CPU 10 when changing the tone color is applied to the register address generation circuit 31b. The timbre parameter to be changed in the timbre change instruction c is designated by the head address of the tone generator RAM 30a and its channel number. Therefore, the register address generation circuit 31b rewrites the voice address of the corresponding channel in the voice address register in the control register 31c from the head address and channel number of the timbre parameter specified by the timbre change instruction c. This voice address register is composed of registers corresponding to the maximum number of simultaneous sound channels, and the head address of the tone color parameter set in each slot (channel) is written as a voice address in each slot register. Then, the Voice Adr change detection circuit 31d detects that the voice address in any channel has been changed, and sends the slot number corresponding to that channel to the cache transfer waiting queue register 31e. The cache transfer queue register 31e is a register for creating a queue of slot numbers for sequentially transferring timbre parameters when the timbre change is performed over a plurality of channels at a time, and is performed by FIFO (First In First Out). It is configured. The first slot number output from the cache transfer waiting queue register 31e is given to the slot number-voice address conversion circuit 31f, the voice address register in the control register 31c is referred to, and the slot number is written into the register of that slot. Is converted to a voice address. This voice address is the head address of the timbre parameter specified for the channel as described above, and the timbre parameter transmission command d including the head address is given from the slot number-voice address conversion circuit 31f to the tone generator memory address generation circuit 31a. It is done.

  The tone generator memory address generation circuit 31a determines whether the head address included in the tone parameter transmission command d is the address range of the tone generator RAM 30a or the tone generator ROM 30b, and the tone color designated from the corresponding tone generator RAM 30a or tone generator ROM 30b. Read parameters. In this case, the tone generator memory address generation circuit 31a reads out all the timbre parameters for one channel, for example, by incrementing the head address by 15 times. The read specified tone color parameter e is given to the data input terminal of the tone color cache memory 32a via the selector 30c. The leading slot number output from the cache transfer waiting queue register 31e is given to the cache address generation circuit 32b as a timbre parameter reception instruction f. The timbre cache memory 32a can store timbre parameters corresponding to the maximum number of simultaneous sound channels, and the cache address generation circuit 32b generates a cache address corresponding to the slot number to store the timbre cache memory 32a. Give to the address input pin. As a result, the timbre parameter of the designated slot number in the timbre cache memory 32a is rewritten by the designated timbre parameter e sent from the selector 30c.

  On the other hand, the sequence data is given to the control register 31c, converted into a format specific to the sound source core 33, and set to the sound source core 33 from the control register 31c when the playback timing of each event in the control data comes. Become. As a result, the tone generator core 33 reproduces the musical sound based on the sequence data. At this time, the tone generator core 33 receives the tone color parameter set for the channel to be reproduced from the tone color cache memory 32a. That is, the tone generator core 33 gives the slot number corresponding to the channel to the cache address generation circuit 32b as a timbre parameter read request h at the playback timing. Receiving this, the cache address generation circuit 32b generates a cache address at a position where the tone color parameter of the slot number is stored and supplies the cache address to the tone color cache memory 32a. As a result, the timbre parameter set in the slot number is sent to the tone generator core 33 at a time, for example, and the tone generator core 33 reproduces the tone of the channel using the sent timbre parameter.

  Here, FIG. 5 shows a data configuration example of the timbre parameter stored in the timbre cache memory 32a. As shown in FIG. 5, the output bit width of the timbre cache memory 32a is set to several tens of bits that can store the timbre parameters for one channel including the parameters SR to FB in one line. The sound source core 33 has as many lines as the maximum number of simultaneous pronunciations. That is, the timbre parameter of channel 1 is stored in the first row, the timbre parameter of channel 2 is stored in the second row, and the timbre parameter of channel N is similarly stored in the Nth row. Is stored. Since the output bit width is wide (for example, about 60 bits), the timbre parameters for one channel can be sent to the sound source core 33 at a time. As a result, the tone color parameters can be immediately sent to the sound source core 33, and the musical tone can be reproduced without being interrupted. Note that N is the maximum simultaneous pronunciation number -1.

  Further, when the tone color is changed, the tone after the tone color change is surely reproduced by masking the key-on until the transfer of the specified tone color parameter to the tone color cache memory 32a is completed. For this reason, the key-on mask circuit 31g is provided with information on the slot number corresponding to the channel whose tone color has been changed, which is output from the Voice Adr change detection circuit 31d. The key-on mask circuit 31g raises a key-on mask signal for masking the key-on of the channel corresponding to the received slot number and sends it to the sound source core 33. As a result, the tone generator core 33 masks the key-on in the channel and pauses the reproduction of the musical sound. When the transfer to the timbre cache memory 32a is completed, the transfer completion flag rises and the key-on mask circuit 31g is reset to the original state. As a result, the rewritten timbre parameter set in the slot number is sent to the sound source core 33, and the sound source core 33 can reliably play the tone-changed tone of the channel using the sent timbre parameter. become.

When the sound source core 33 is a PCM sound source, various sampling waveforms can be stored in the sound source ROM 30b and the sound source RAM 30a. At the time of music tone reproduction, the tone generator waveform 33 is given a tone color waveform address designated by the tone generator memory address generation circuit 31a. Receiving this, the tone generator memory address generation circuit 31a determines whether the waveform address is the address range of the tone generator RAM 30a or the tone generator ROM 30b, and reads the specified waveform data from the corresponding tone generator RAM 30a or tone generator ROM 30b. The read waveform data is given to the tone generator core 33 via the selector 30c, and the tone generator core 33 reproduces a musical tone having a specified tone color using this waveform data.
Thus, the tone generator RAM 30a is a general-purpose memory that can store not only the timbre parameters but also other data.

Next, FIG. 6 shows a flowchart of the reproduction process executed by the tone generator hardware unit 15 in the musical tone reproduction apparatus according to the present invention.
In a mobile phone to which a music sound reproducing device is applied, when the music sound reproducing device is set to reproduce a melody for notifying an incoming call, a music sound reproducing instruction is given when an incoming call is received, as shown in FIG. The playback process is started. Then, initialization processing for initializing the tone generator hardware unit 15 is performed, such as resetting various registers or setting default values in step S1. Next, the tone color parameter memory registration process at step S2, the tone color change process at step S3, and the tone data process at step S4 are performed in parallel. The processing from step 2 to step S3 is repeatedly executed until the sequence data ends or is instructed to stop, so that the musical sound obtained by reproducing the sequence data is output.

Next, the process of step 2 thru | or step S3 is demonstrated with reference to FIG. 7 thru | or FIG.
FIG. 7 shows a memory registration process flowchart of the timbre parameter.
After the start of musical tone reproduction is instructed and initialization processing is performed, when the user operates the button of the input unit 17 to select memory registration of timbre parameters, the timbre parameter memory registration processing shown in FIG. 7 is started. The Then, in step S10, it is determined whether or not there is a registration request from the CPU 10. Here, if the tone color parameter write command c is given from the CPU 10 to the tone generator hardware unit 15 and the tone color parameter transmission command a is given to the RAM 11, it is determined YES and the process proceeds to step S11. The timbre parameters read from the RAM 11 are registered in the sound source RAM 30a in the sound source memory 30. When the registration is completed, the memory registration process for the timbre parameters is completed and the process returns. If it is determined in step S10 that there is no registration request from the CPU 10, the memory registration process for the timbre parameters is terminated and the process returns.

Next, FIG. 8 shows a flowchart of the timbre change process.
After the tone reproduction is instructed by a tone change message embedded in the sequence data after the start of music reproduction is instructed and the initialization process is performed, is a tone change command received from the CPU 10 in step S20? It is determined whether or not. Here, if the CPU 10 gives the tone color change instruction c to the control unit 31 in the sound source hardware unit 15, it is determined YES and the process proceeds to step S21 and step S22. In step S21, the tone color parameter designated from the tone generator RAM 30a or tone generator ROM 30b is read out and transmitted to the tone color cache memory 32a. In step S22 processed in parallel with step S21, the transmitted timbre parameter is received by the timbre cache memory 32a, and the timbre parameter of the designated channel is rewritten. When the processes of step S21 and step S22 are finished, the tone color changing process is finished and the process returns. If it is determined in step S20 that the timbre change command from the CPU 10 has not been received, the timbre change process is terminated and the process returns.

Next, FIG. 9 shows a flowchart of sound data processing.
The control data is set from the control unit 31 to the sound source core 33 at the playback timing of each event in the control data after the start of music playback is instructed and the sound source hardware unit 15 is initialized. . As a result, it is time to reproduce the musical sound, and the sound data processing is started. In step S30, it is determined whether or not key-on is set in the sound source core 33 and the key-on is being performed. Here, if the key-on is set, it is determined YES and the process proceeds to step 31, where the tone generator core 33 reads the tone parameter of the channel to be reproduced from the tone color cache memory 32a. Next, data processing for reproducing a musical tone is performed based on the timbre parameter read in step S32 and the set control data. Then, the musical sound data reproduced in step S33 is output (sounded). When the process of step S33 ends, the sound data process ends and the process returns. Also, if it is determined in step S30 that the key is not on, the sound data processing is terminated and the process returns.

In the above description, the timbre parameter for one channel is sent from the timbre cache memory 32a to the tone generator core 33 in one access, but the timbre for one channel is accessed several times with the output bit width slightly narrowed. The parameter may be sent to the sound source core 33. Even in this case, there is almost no influence of sound interruption due to the processing time.
The above-described musical sound reproducing apparatus of the present invention is not applied only to the above-described mobile phone which is a portable terminal device, but is applied to a portable information device capable of outputting musical sounds, a portable personal computer capable of outputting musical sounds, and the like. Can be applied. At this time, the music content data may be reproduced in synchronization with the text or image content.

The sound source core 33 in the sound source hardware unit 15 can be configured by a frequency modulation type sound source, that is, an FM sound source. The FM sound source uses harmonics generated by frequency modulation for synthesizing musical sounds, and can generate a waveform having harmonic components including anharmonic sound with a relatively simple circuit. The FM sound source can generate a wide range of musical sounds from synthesized sounds of natural musical instruments to electronic sounds. The FM sound source uses an oscillator called an operator that oscillates a sine wave equivalently. For example, the FM sound source can be configured by cascading a first operator and a second operator. Also, the FM sound source can be configured even if the operator's own output is fed back and input.
Furthermore, the sound source method of the sound source core 33 in the sound source hardware unit 15 is not limited to the FM sound source method, and may be a waveform memory sound source (PCM sound source, ADPCM sound source) method, a physical model sound source method, and the like. As a configuration, a hardware sound source using a DSP or the like can be used.

It is a figure which shows the structural example of embodiment at the time of applying the portable terminal device of this invention provided with the musical tone reproduction apparatus of this invention to a mobile telephone. It is a figure which shows the structural example of the musical tone reproduction apparatus concerning embodiment of this invention. It is a figure which shows the detailed structure of the sound source memory in the sound source hardware part in the musical tone reproduction apparatus concerning embodiment of this invention, a control part, and a cache memory. It is a figure which shows the example of a data structure of the timbre parameter registered into the sound source RAM in the musical tone reproduction apparatus concerning embodiment of this invention. It is a figure which shows the data structural example of the timbre parameter stored in the timbre cache memory in the musical tone reproduction apparatus concerning embodiment of this invention. It is a flowchart of the reproduction | regeneration processing which the sound source hardware part of the musical tone reproduction apparatus concerning embodiment of this invention performs. It is a flowchart of the memory registration process of the timbre parameter in the reproduction | regeneration processing which the sound source hardware part of the musical tone reproduction apparatus concerning embodiment of this invention performs. It is a flowchart of the timbre change process in the reproduction | regeneration processing which the sound source hardware part of the musical tone reproduction apparatus concerning embodiment of this invention performs. It is a flowchart of the sound data process in the reproduction | regeneration processing which the sound source hardware part of the musical tone reproduction apparatus concerning embodiment of this invention performs. It is a figure which shows the structural example of the conventional musical sound reproduction apparatus.

Explanation of symbols

1 mobile phone, 2 base station, 10 CPU, 11 RAM, 12 ROM, 13 communication unit, 14 sound processing unit, 15 sound source hardware unit, 16 I / F, 17 input unit, 18 display unit, 19 vibrator, 20 external Equipment, 21 Microphone, 22 Incoming speaker, 23 Incoming speaker, 24 Bus, 25 Antenna, 30 Sound source memory, 30a Sound source RAM, 30b Sound source ROM, 30c Selector, 31 Control unit, 31a Sound source memory address generation circuit, 31b Register address Generation circuit, 31c control register, 31d Voice Adr change detection circuit, 31e cache transfer wait queue register, 31f slot number-voice address conversion circuit, 31g key-on mask circuit, 32 cache memory, 32a tone color cache memory, 32b cache Address generating circuit, 33 a sound source core, 34 speaker, 110 CPU, 111 RAM, 115 tone hardware unit, 130 tone color parameter storage region, 133 the data processing unit, 134 a speaker

Claims (4)

General-purpose storage means capable of registering at least an arbitrary number of timbre parameter groups;
Sound source means for playing a musical sound based on the set tone parameters;
A cache memory having a large output data width for transferring timbre parameters to the sound source means;
When changing the timbre set in the sound source means, the timbre parameter of the timbre to be changed is read from the timbre parameter group stored in the general-purpose storage means, transferred to the cache memory, and the sound source means from the cache memory The musical tone reproducing apparatus is characterized in that the timbre parameter to be changed is transferred to. When the system control means whose main process is processing other than the musical tone reproduction process outputs a timbre change instruction, the timbre parameter specified by the timbre change instruction is read from the general-purpose storage means and transferred to the cache memory. 2. The musical tone reproducing apparatus according to claim 1, wherein the designated timbre parameter is transferred from the cache memory to the tone generator means. 3. A musical tone reproducing apparatus according to claim 2, wherein the timbre parameter designation in the timbre change instruction is a head address of a timbre parameter to be changed in the general-purpose storage means. A portable terminal device comprising the musical sound reproducing device according to claim 2 or 3,
The mobile terminal device characterized in that the system control means executes mobile terminal function processing as main processing.

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