JP2003186781A - Electronic apparatus for digital signal processing and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change contents of processing in digital signal processing freely and change contents in response to objects to be processed in a DSP (Digital Signal Processor). <P>SOLUTION: A cellular phone 1 has a CPU processing part 21 and a DSP processing part 22. The CPU processing part 21 downloads algorithm data MA and a loader program LD from a server located on a network such as the Internet. When the loader program LD is executed by the CPU processing part 21, the algorithm data MA is installed into the algorithm storage part in the DSP processing part 22. Thus, the DSP executes digital signal processing according to the updated algorithm. When parameters are downloaded along with the algorithm data MA from the network, the parameters are set and it enables the DSP to perform more detail digital signal processing. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital signal processing technique.

[0002]

[Technical background] <Signal processing by DSP> DSP (Digita
There is an effector that modulates voice and musical instrument sound in various ways by using digital signal processing technology. In recent years, DSPs are also used in mobile phones, communication devices, and the like, and, for example, voice compression / expansion processing (for example, CELP (Code excited linear prediction) and MP3).
(MPEG-1 Audio Layer 3)), or it is also used for image processing by utilizing its high-speed computing performance.

FIG. 10 is a block diagram showing a voice modulation (effector) process using a DSP. The input voice / instrument sound is digitally converted and then input to the DSP processing unit. The DSP processing unit executes processing according to an instruction from an operation program that is performing overall control. This processing is signal processing prepared in advance (fixed) in the DSP, such as a digital filter and a digital delay. Further, the DSP processing unit executes the algorithm according to the parameters given from the outside. When the digital signal processing is executed in this way, the digital data after the modulation processing is converted into analog data and the modulated voice is output. Such processing is generally realized by an effector device or the like that is used by connecting to a musical instrument or the like.

FIG. 11 is a processing block diagram when the DSP is used for Internet communication such as a mobile phone.
The voice input from the mobile phone is digitally converted, then input to the DSP processing unit, subjected to the voice compression codec, and then transmitted to the communication circuit via the digital communication processing unit. On the other hand, the digital signal received from the communication circuit is subjected to voice expansion codec in the DSP processing unit, converted into analog, and then output from the speaker.

FIG. 12 is a processing block diagram when the DSP is used for reproduction processing of audio and video data in a mobile phone. Digital data downloaded via a communication line such as the Internet is temporarily stored in a medium such as a memory. The DSP processing unit recalls the temporarily stored data, performs voice decompression processing and image processing, and the voice decompressed audio signal is analog-converted and then output from the speaker. Further, the image data subjected to the image processing is output to the monitor via the frame memory.

<About JAVA (registered trademark)>
In current mobile phones and the like, JAVA (registered trademark) is used, and a small size (10 KByte to 5
It is possible to transfer and execute a program of about 0 KByte.

<Regarding Plug IN> Software operating on a PC-Web browser or voice editing software,
For image editing software, there is a program module called a plug-in. The user can add new functions to the main software by purchasing or downloading the plug-in module and additionally installing it in the main body (main software).

[0008] For example, as a plug-in for a Web browser, there is a plug-in for playing a moving picture format such as Quick Time (trademark) and a function for playing an animated moving picture such as Flash (trademark).

With voice editing software, for example, VST
The plug-in of the format called (trademark) is CUBASE
By adding to main software such as (trademark), a software synthesizer, a drum machine, various sound modulation effects, etc. are added and realized. In image editing as well, there are plugins for adding various image processing effects to Photo Shop (trademark) and the like.

In the above example, a new sound source can be added by the virtual synthesizer by incorporating the plug-in into the voice editing software. FIG. 13 shows, as an example, a screen image in which a VST (= virtual musical instrument) plug-in is incorporated in music editing software.

As for the mechanism of the plug-in, there is a plug-in program that operates in multitasking in parallel with the main program, and the IF (interface) specification with the program is determined. Briefly, the IF specifications for inputting and outputting audio are fixed. Therefore, it is possible to obtain the modulation effect as if it were processed by DSP by performing various audio modulation processing on the plug-in side to the sound pronounced by the main program and returning the sound after the modulation processing to the main program. (However, C of PC
Since it depends on PU performance, it is difficult to perform high-speed processing like DSP.

[0012]

When a voice or image modulation and processing apparatus using a DSP or the like is used in a mobile phone, a mobile PC, a game machine, etc., there are generally the following problems.

1) The processing contents of the DSP are limited within a range that does not affect the voice quality such as voice compression and expansion.
It was usually (fixed) usage. Therefore, it is not suitable for hobbies and entertainment.

As an application example, an invention has been proposed by the same applicant as an invention in which a voice modulated by a DSP or the like and a conversion parameter thereof are communicated with a key to restore the modulated voice (for crime prevention, etc.). ing. Also, a technique has been proposed in which voice modulation is performed during voice communication to provide a hobby and entertainment use method.

However, even in such an application example, the (DSP processing) algorithm for voice modulation is
There is a predetermined playback terminal, and the algorithm itself cannot be changed in various ways.

2) The processing content of the DSP should be different between communication (voice communication, image communication) and reproduction (music reproduction, video reproduction). In the past, mobile phones and music players (eg, mobile cassette players) have existed as different hardware. Although there are PDAs and mobile PCs capable of both communication and reproduction, there is no precedent for realizing DSP processing for these purposes in these devices. VS mentioned above
The T plug-in controls to apply the effect only when the sound is reproduced.

Further, although some effects are applied during the communication processing, the content of the processing is about noise reduction, and no one performs the DSP processing according to the respective characteristics during the reproduction and the communication.

Therefore, in view of the above problems, the present invention provides a DS
It is an object of the present invention to provide a technique capable of exerting an effect effect according to a scene by changing the content of P processing in various ways.

[0019]

[Means for Solving the Problems] In order to solve the above problems, J
It is possible to download the DSP algorithm itself using a technology such as AVA (registered trademark), or obtain the DSP algorithm via various media (medium) and install it in a plug-in format. Also,
By executing only required functions when needed, small hardware assets such as mobile phones and mobile devices (D
It provides a mechanism to save SP processing capacity and memory).

By combining with JAVA (registered trademark), not only the DSP algorithm but also the program such as the application and the algorithm and parameters related to the application can be simultaneously delivered.

Further, it is characterized in that different DSP processing is performed at the time of communication and at the time of reproducing content, and processing for automatically switching them is performed.

That is, the invention according to claim 1 is an electronic device which is used for a predetermined purpose while processing a digital signal, and which comprises a communication means and an overall control means for controlling the entire electronic device. Digital signal processing means for performing processing for changing characteristics of the digital signal with respect to the input digital signal, the overall control means from the server existing on the network via the communication means, the digital signal And changing the processing content of the digital signal processing means, comprising means for acquiring algorithm data defining processing content of the processing means and a loader program for installing the algorithm data in the digital signal processing means. The feature is that it is possible.

According to a second aspect of the present invention, in the electronic device for performing the digital signal processing according to the first aspect, the overall control unit means is a circuit group including a CPU (Central Processing Unit), and the digital signal processing is performed. Means is DSP
It is characterized by a circuit group including (Digital signal processor).

According to a third aspect of the present invention, in the electronic device performing the digital signal processing according to the first or second aspect, the overall control means further stores the acquired algorithm data and the loader program. Storage means, the digital signal processing means comprises an algorithm storage means for storing algorithm data corresponding to processing contents, and the loader program is the algorithm data acquired by the overall control means and stored in the storage means. Is stored in the algorithm storage means to execute the installation process.

According to a fourth aspect of the present invention, in the electronic device for performing digital signal processing according to any of the first to third aspects, the loader program is a server existing on a network via the communication means. A module for obtaining the algorithm data from, the overall control means obtains the loader program, the loader program performs the algorithm data obtaining process, and the algorithm data installing process. It is characterized by executing.

According to a fifth aspect of the present invention, in the electronic device for performing digital signal processing according to any one of the first to fourth aspects, the loader program is a platform-independent execution module. To do.

According to a sixth aspect of the present invention, in the electronic device for performing digital signal processing according to any of the first to fifth aspects, the overall control means is further connected to the network via the communication means. It is characterized by including means for acquiring a parameter which is a set value for adjusting the processing content defined by the algorithm data from an existing server.

According to a seventh aspect of the present invention, in the electronic device for performing the digital signal processing according to the sixth aspect, the digital signal processing section further comprises a parameter storage means for storing a current set value of the algorithm. The loader program executes a process of storing the parameter acquired by the overall control unit in the parameter storage unit.

According to an eighth aspect of the present invention, in the electronic device for performing digital signal processing according to any one of the first to seventh aspects, the overall control means is further present on the network via the communication means. Means for acquiring an application program relating to control of the electronic device from a server, and the processing in the digital signal processing section is controlled by the application program executed by the overall control means.

According to a ninth aspect of the invention, in the electronic device for performing the digital signal processing according to the first aspect, the overall control section means and the digital signal processing means are realized by one high-speed CPU. And

According to a tenth aspect of the present invention, there is provided an electronic apparatus which is used for a predetermined purpose while processing a digital signal, and which includes a storage medium reading means and an overall control including a CPU for performing overall control of the electronic apparatus. Means and digital signal processing means including a DSP for performing processing for changing the characteristics of the input digital signal,
The overall control means includes means for acquiring, via the storage medium reading means, algorithm data which is stored in a storage medium and which defines processing contents of the digital signal processing means. It is characterized in that the contents can be changed.

According to an eleventh aspect of the present invention, in the electronic device for performing digital signal processing according to the tenth aspect, the overall control means is further stored together with the algorithm data in the storage medium. A means for acquiring a parameter, which is a set value for adjusting the processing content of the digital signal processing means, is provided.

According to a twelfth aspect of the present invention, in the electronic device for performing digital signal processing according to the tenth or eleventh aspect, the overall control means further stores the algorithm data in the storage medium. Means for acquiring the reproduced content data.

According to a thirteenth aspect of the present invention, there is provided an electronic device which is used for a predetermined purpose while processing a digital signal, and which is an overall control means including a CPU which controls the entire electronic device, and an input digital signal. A digital signal processing unit including a DSP that performs a process of changing a characteristic of the digital signal with respect to a signal, and the overall control unit stores a plurality of algorithm data defining a processing content of the digital signal processing unit. And a means for selecting appropriate algorithm data from the plurality of algorithm data according to an operating state of the electronic device and loading the selected algorithm data into the digital signal processing unit. Characterize.

According to a fourteenth aspect of the present invention, in the electronic device performing the digital signal processing according to the thirteenth aspect, the overall control means is further added to the communication means and data received via the communication means. Means for selecting algorithm data to be selected from the supplementary information.

According to a fifteenth aspect of the present invention, in the electronic device for performing the digital signal processing according to the fourteenth aspect, the plurality of algorithm data are preloaded in the digital signal processing section, and the digital signal processing section is loaded. The pre-processor refers to the additional information to select algorithm data to be selected, and executes digital signal processing while switching the algorithm data.

According to a sixteenth aspect of the present invention, in the electronic device which performs the digital signal processing according to the fourteenth or fifteenth aspect, the electronic device reproduces voice processing or image data and communication processing using the communication means. The reproduction process can be executed, and the algorithm data is switched and executed during the communication process and the reproduction process.

According to a seventeenth aspect of the present invention, in an electronic device for performing digital signal processing according to any one of the fourteenth to sixteenth aspects, the electronic device receives communication in communication processing using the communication means. It is characterized in that the algorithm for the signal received in the communication processing is sequentially switched and executed while referring to the supplementary information added to the data.

The invention described in claim 18 is a digital signal processing method executed by an electronic device used for a predetermined purpose, wherein the electronic device controls a communication means and the electronic device as a whole. An overall control unit including a CPU, and a digital signal processing unit including a DSP that performs a process of changing a characteristic of the input digital signal with respect to the input digital signal are provided, and the method is performed on the network via the communication unit. And a loader program for installing the algorithm data in the digital signal processing means from a server existing in the above, and a loader program for installing the algorithm data in the digital signal processing means. By executing the loaded loader program, the acquired algorithm data is Characterized in that it comprises the the steps of installing the signal processing unit.

According to a nineteenth aspect of the present invention, there is provided a digital signal processing method executed by an electronic device used for a predetermined purpose, wherein the electronic device includes a CPU for controlling the entire electronic device. And a digital signal processing unit including a DSP that performs a process of changing a characteristic of the input digital signal with respect to the input digital signal, wherein the method stores the digital signal in a storage unit included in the overall control unit. A step of storing a plurality of algorithm data defining the processing content of the processing means, a step of determining an operating state of the electronic device, and an appropriate step from among the plurality of algorithm data according to the operating state of the electronic device. Selecting algorithm data and installing the selected algorithm data in the digital signal processing means. To.

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION <1. Configuration of Mobile Phone and Control Unit> Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a mobile phone 1 as an example of an electronic device which is a communication / playback device to which the signal processing method of the present invention is applied.

The mobile phone 1 communicates with the base station via the communication unit 11. The communication unit 11 includes a functional unit that controls both voice communication and data communication (such as image communication).

In addition, the mobile phone 1 is provided with a speaker 12 for outputting voice, a microphone 13 for inputting voice, and a monitor 14 for displaying images and various information. It should be noted that the speaker 12 is a functional unit including both a speaker having a relatively small output for outputting a voice in a voice call and a speaker having a relatively large output for reproducing a ring tone or music.

The D / A converter 15 converts the digital signal into an analog signal and then converts the voice signal into the speaker 1.
2, and the A / D converter 16 is a functional unit that converts the audio signal input from the microphone 13 into a digital signal. The frame memory 17 is a memory capable of accumulating pixel data for displaying on the monitor 14 for one frame, and controls output to the monitor 14.

In such a configuration, during a voice call, the voice signal input from the microphone 13 is converted into a digital signal by the A / D converter 16 and transmitted to the control unit 20. The control unit 20 performs a predetermined digital process and then outputs an audio signal to the communication unit 11. Then, the communication unit 11 transmits the audio signal to the base station.

On the other hand, the audio signal which is the digital signal received by the communication section 11 is transmitted to the control section 20. Control unit 2
When predetermined digital processing is performed at 0, the audio signal is converted into an analog signal in the D / A converter 15 and output from the speaker 12.

The mobile phone 1 has a card slot 18
Is equipped with. Various storage media can be read into the card slot 18 by appropriately incorporating driver software.

Next, the structure of the control unit 20 will be described. The control unit 20 is a central unit that controls the operation of the mobile phone 1. In the present embodiment, the control unit 20 controls the CP
It has U210 and DSP220.

The CPU 210 has a RAM 211 and a ROM 2
Various processes are executed on the CPU 210 by reading the programs and data stored in 12. In the following description, the CPU 210, RAM 211, ROM 21
For convenience, the processing system including 2 will be referred to as a CPU processing unit 21. The CPU 210 has a role as a control unit that controls the overall control of the mobile phone 1, and also controls digital signal processing by the DSP.

The DSP 220 has an algorithm storage unit 22.
D by reading the algorithm stored in 1.
Various processes are executed on SP220. The content of the process is determined by an algorithm, but various processes that change the characteristics of the digital signal are executed. However, in this specification, "the process of changing the characteristics of a digital signal" means not only changing the contents expressed by a digital signal, such as noise filter, digital delay, reverb, etc., but not changing the contents. Also, processing for changing the data format or the storage format (audio compression / expansion processing, image compression / expansion processing, etc.) is included.
In other words, "the process of changing the characteristics of a digital signal" differs by operating the data content according to a predetermined algorithm while maintaining all or part of the content expressed by the original digital signal. It is to exert the expressive effect and to convert to different data formats.

When the algorithm is executed, the parameters stored in the parameter storage unit 222, the internal memory IRAM 223, and the external memory EXRAM are used.
224 is used. In the following description, the DSP 22
0, algorithm storage 221, parameter storage 22
2, the processing system including the IRAM 223 and the EXRAM 224 is referred to as the DSP processing unit 22 for convenience.

Further, in this specification, for easy understanding of the description, the processing instruction executed on the CPU processing unit 21 is called "program", and the processing instruction executed on the DSP processing unit 22 is called "program". We call them "algorithms" to distinguish them.

<2. Outline> FIG. 2 is a diagram showing a basic concept of the signal processing method of the present embodiment. In the present embodiment, mobile phone 1 downloads, for example, a program, an algorithm, and a parameter existing on the network. For each downloaded data, the program is executed in the CPU processing unit 21, and the algorithm is executed in the DSP processing unit 22 using the parameters. In this way, by downloading the algorithm executed by the DSP processing unit 22, the DSP processing can be changed in various ways.

FIG. 3 is a diagram showing a concept as an application of the signal processing method of the present embodiment. The mobile phone 1 executes a process of reproducing a call voice during voice communication and a process of reproducing content data (sound data such as MP3, image data, etc .; the same applies hereinafter). Then, in the present embodiment, in each of these processes, the content of the processing of the digital signal for the reproduced sound is changed. This makes it possible to obtain a desired effect effect according to the purpose. For example, as shown in the figure, during voice communication, the DSP processing unit 22 performs noise reduction processing, and during content reproduction,
The equalizer processing is performed.

{Embodiment 1} Next, Embodiment 1 of the present invention will be described with reference to FIG. Control unit 2
0 is a voice (image) modulation processing algorithm MA (hereinafter referred to as algorithm M from a server or terminal on the network).
Abbreviated as A) and the loader program LD. Here, the loader program LD is a program for storing the algorithm MA in the algorithm storage unit 221 of the DSP processing unit 22. The process of downloading the algorithm MA and the loader program LD is realized by executing the program stored in the ROM 212 or the like.

In this embodiment, the loader program LD is a Java (registered trademark) applet format program. By using the JAVA (registered trademark) applet format, it is possible to avoid the platform dependence (machine dependence or OS dependence) and realize the program distribution more easily. However, it is possible to use any program form other than the JAVA (registered trademark) applet including the program depending on the platform.

The algorithm MA and the loader program LD may be downloaded from a server arranged on a wide area network such as the Internet, or may be stored in a server on a private network accessible only to contract users. You may do it.

Specifically, the control unit 20 downloads the algorithm MA and the loader program LD in response to a user operation or in the automatic download format. As a result, when the algorithm MA and the loader program LD are stored in the memory (RAM 21 or the like) of the mobile phone 1 via the communication unit 11, the CPU processing unit 21 executes the loader program LD. The loader program LD is the downloaded DS
Algorithm MA, which is a P processing algorithm,
The data is stored in the algorithm storage unit 221 of the processing unit 22. As a result, the DSP processing unit 22 executes digital signal processing according to the algorithm stored in the algorithm storage unit 211.

When digital signal processing is executed in the DSP processing unit 22 according to the updated algorithm,
The processed audio signal or content reproduction signal is the speaker 1
It is output from 2. Alternatively, digital signal processing is performed on the voice input from the microphone 13 according to the updated algorithm.

As described above, in the first embodiment, D
Since the algorithm that defines the processing content of the SP processing is downloaded from the network, the processing content of the DSP processing can be changed according to the purpose. Therefore, the user can variously change the output voice according to his / her preference. For example, during a voice call, various effects can be applied to the other party's voice.

On the contrary, it is also possible to add the effect to the voice to be transmitted and then transmit the voice to the other party. Specifically, the audio signal input to the microphone 13 is digitally converted by the A / D converter 16 and then transmitted to the control unit 20. In the control unit 20, the DSP processing unit 22 performs signal processing on the input voice according to the stored algorithm. The audio signal subjected to the digital signal processing is transmitted to the partner terminal via the communication unit 11. As described above, since the digital signal processing can be performed on the outgoing voice by changing the DSP algorithm according to the preference, it is possible to transmit the voice while changing the own voice in various ways. is there.

In the above description, the case where the algorithm MA and the loader program LD are downloaded at the same time has been described as an example. However, the method in which only the loader program LD which is a JAVA (registered trademark) applet is downloaded first is also possible. Good. In this case, the loader program LD makes an inquiry to the server to download the required algorithm MA, and
The downloaded algorithm MA is stored in the algorithm storage unit 221.

Here, in the present embodiment, the control unit 2
0 is to be deleted from the memory (RAM 211 or the like) after the downloaded loader program LD completes the processing of storing the algorithm MA in the algorithm storage unit 221. That is, in a mobile terminal such as a mobile phone, it is necessary to save hardware resources at all times, so that necessary modules are held only for a necessary period of time. However, if the memory capacity can be secured, the downloaded loader program LD
May be saved. In this case, it is possible to omit the download process again.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. The description of the same contents as those described in the first embodiment will be omitted. The mobile phone 1 uses the algorithm MA and
Download the loader program LD. further,
The mobile phone 1 uses an application program PG (hereinafter, abbreviated as program PG) and a sound (image) modulation processing parameter MP (hereinafter, parameter M) from a network.
Abbreviated as P).

Here, the loader program LD stores the algorithm MA and the parameter MP in the DSP processing unit 2.
2 is a program to be stored in the second algorithm storage unit 221.

The program PG is an application program for content reproduction or a game program, and operates on the CPU processing section 21. That is, the program PG is a program that directly controls the interface with the user. The program PG is the CPU
While operating in the processing unit 21, for predetermined processing, DS
A processing request is made to the P processing unit 22. In this way, the CPU and DSP cooperate to execute the application.

Further, the parameter MP is the DSP processing unit 2
2 is a parameter for adjusting the processing content of the algorithm MA executed in 2. For example, the parameter MP is used to specify the delay time in the case of an algorithm that delays voice, and to specify the distortion rate in the case of an algorithm that distorts the voice.

Also in this embodiment, the loader program LD is a Java (registered trademark) applet format program. However, any program form other than the JAVA (registered trademark) applet can be used.

Specifically, in response to a user's operation or in the automatic download format, the control unit 20 performs a download process for each data of the program PG, the loader program LD, the algorithm MA, and the parameter MP. As a result, the program PG,
Loader program LD, algorithm MA, and
When each data of the parameter MP is stored in the memory (RAM 211 or the like) of the mobile phone 1 via the communication unit 11, CP
The U processing unit 21 executes the loader program LD.

The loader program LD stores the downloaded algorithm MA, which is the DSP processing algorithm, in the algorithm storage unit 221 of the DSP processing unit 22. Further, the loader program LD stores the downloaded parameter MP for DSP processing in the parameter storage unit 222 of the DSP processing unit 22.

Then, the program PG is executed on the CPU processing section 21. As a result, the application is executed on the mobile phone 1. Then, the DSP process is called during the execution of the application. As a result, in the DSP processing unit 22, the parameter storage unit 222
Digital signal processing is performed by executing the algorithm MA stored in the algorithm storage unit 211 in accordance with the parameter MP stored in.

When digital signal processing is executed in the DSP processing unit 22 according to the updated algorithm,
The processed audio signal or content reproduction signal is the speaker 1
It is output from 2. Alternatively, digital signal processing is performed on the input voice according to the updated algorithm.

At this time, when the program PG is an application program for content reproduction, the content data to be reproduced may be data that the mobile phone 1 has already acquired and stored in the memory or the like. As shown in the figure, it may be data downloaded from the network.

When changing the processing contents of a digital signal in an application, a plurality of algorithms MA and parameters M are set for one program PG.
You may make it download P. Then, under the control of the program PG, necessary data is selected from the plurality of algorithms MA and the parameters MP and stored in the algorithm storage unit 221 and the parameter storage unit 222. Then, the algorithm MA and the parameter MP are changed in accordance with the operation of the program PG.

As described above, also in the second embodiment, D
Since the algorithm that defines the processing content of the SP processing is downloaded from the network, the processing content of the DSP processing can be changed according to the purpose. Further, since the parameter MP for adjusting and operating the operation state of the algorithm MA is also downloaded, it is possible to realize more detailed operability of DSP processing.

{Third Embodiment} Next, a third embodiment of the present invention will be described with reference to FIG. Note that description of the same content as that described in the first and second embodiments will be omitted. In this embodiment, the mobile phone 1 uses the algorithm MA and
The parameter MP is installed via the various storage media 30. As storage media, smart cards,
There are CF cards, SD cards, etc., and any of these media may be used. Further, the content CT may be acquired via the storage medium 30.

The mobile phone 1 also downloads the program PG and the driver DR from the network. Here, the driver DR is driver software for reading the storage medium 30 (that is, driver software for controlling the card slot 18). Therefore, when the user acquires the algorithm MA, the parameter MP, etc. using the storage medium 30, the user downloads the driver DR in advance so that the storage medium 30 can be accessed. However, if the driver software of the storage medium 30 is already installed, the driver DR need not be downloaded.

Here, the driver DR is the storage medium 3
It has a function as driver software for controlling access to 0 and a function for storing the algorithm MA and the parameter MP in the algorithm storage unit 221 (that is, the loader program L of the first embodiment).
It also has the function as D).

Specifically, the program PG executed under the control of the CPU processing unit 21 is the storage medium 30.
To access the algorithm MA and
The parameter MP is acquired and stored in the RAM 211. Next, the algorithm storage unit 22 stores the algorithm MA and the parameter MP acquired by the driver DR, respectively.
1, stored in the parameter storage unit 222.

The contents CT are stored in the storage medium 30.
, The program PG acquires the content CT and stores it in the RAM 211. Then, the program PG executes a reproduction process of the content CT. In this way, the content CT is reproduced on the CPU processing unit 21. Further, in response to the call from the CPU processing unit 21, the DSP processing unit 22 executes the reproduction process of the content CT. At this time, digital signal processing is executed according to the algorithm MA and the parameter MP acquired from the storage medium 30. Further, the content CT may be directly loaded on the DSP and the processing may be sequentially performed on the DSP.

When digital signal processing is executed in the DSP processing unit 22 according to the updated algorithm,
The processed audio signal or content reproduction signal is the speaker 1
It is output from 2. Alternatively, digital signal processing is performed on the input voice according to the updated algorithm.

As described above, in the third embodiment, D
Since the algorithm that defines the processing content of the SP processing is installed from the various storage media 30, the processing content of the DSP processing can be changed according to the purpose.
Furthermore, since the parameter MP that defines the operation state of the algorithm MA is also acquired via the storage medium 30, it is possible to realize more detailed operability of DSP processing.

{Fourth Embodiment} Next, a fourth embodiment of the present invention will be described with reference to FIG. Note that description of the same content as that described in the above-described embodiment will be omitted.

The mobile phone 1 has a memory (RAM 211, R
OM212 etc.) different types of algorithms MA1, M
It stores A2. This algorithm MA1, MA2
May be downloaded from the network as in the first embodiment, or may be acquired from the storage medium 30 as in the third embodiment.

Although not shown in the figure, the program P is stored in the memory by executing the download and acquiring it via the storage medium 30.
G, a loader program LD, and a parameter MP are stored.

Here, in this embodiment, the algorithm MA1 is a processing algorithm for voice communication,
The algorithm MA2 is assumed to be a processing algorithm for content reproduction.

In this embodiment, the CPU processing unit 2
1 changes the DSP processing algorithm according to the purpose of processing. That is, the CPU processing unit 21 stores the algorithm MA1 for voice communication in the algorithm storage unit 221 during voice communication. In addition, the CPU processing unit 21
Stores the algorithm MA2 for content playback in the algorithm storage unit 221 during content playback.
As a result, the DSP processing unit 22 will perform digital signal processing according to the purpose.

In voice communication of a mobile phone or the like, the band is usually around 6 KHz (6 Kbps), and CEL
The compression / expansion process of the P (G723.1) system is performed. This processing is suitable for the balance between the sound quality and the band, and is excellent in the quality of conversation. Therefore, the algorithm M
As A1, for example, a voice compression / decompression process such as CELP will be executed. At this time, a process such as a noise gate may be used together if necessary.

On the other hand, during reproduction, for example, when listening to music, the frequency characteristics such as MP3 are excellent (20
KHz to 11 KHz / 22 KHz) format compression / expansion processing is performed. At this time, an equalizer (tone control) algorithm for adjusting the reproduction sound quality may be used together. Further, when reproducing MP3, a processing algorithm such as a coder is transmitted from the CPU processing unit 21 to the DS in the MP3.
It is transmitted to the P processing unit 22.

As described above, in this embodiment, since the DSP processing algorithm is changed according to the processing target, even if the processing target changes, the algorithm according to the processing target is selected. It is possible to obtain excellent effect effects.

{Fifth Embodiment} Next, a fifth embodiment of the present invention will be described with reference to FIG. Note that description of the same content as that described in the above-described embodiment will be omitted.

In this embodiment, the fourth embodiment is used.
Similarly, the mobile phone 1 has a memory (RAM 211, RO
Different types of algorithms MA1, MA
It stores 2. The algorithms MA1 and MA2 may be downloaded from the network as in the first embodiment, or the storage medium 3 may be downloaded as in the third embodiment.
You may make it acquire from 0.

Also in this embodiment, the algorithm MA
1 is a processing algorithm for voice communication, and the algorithm MA2 is a processing algorithm for content reproduction.

In this embodiment, the DSP processing unit 2
The preprocessor 225 included in 2 changes the DSP processing algorithm according to the purpose of the processing. In this embodiment, two processing methods are possible.

<First Method> This is a method applicable when the DSP processing unit 22 has a sufficient processing capacity (MIPS). In the first method, two algorithms MA1, MA
2 is loaded in the DSP processing unit 22 in advance. The loaded algorithms MA1, MA2 are, for example,
It is stored in the IRAM 223.

When the DSP processing unit 22 inputs data while the algorithms MA1 and MA2 are loaded, the preprocessor 225 provided in the DSP processing unit 22.
Determines the type of data.

A marker 40 is added as a header to each of the audio (image) data 41, the audio (image) content data 42, etc. input to the DSP processing section 22. The marker 40 has an upper portion for specifying the type of data. Therefore, the preprocessor 2
The 25 can refer to the marker 40 to determine the data type.

When the preprocessor 225 discriminates the data type, the conditional branching unit (IF instruction, CMP instruction) inside the DSP performs the distribution processing (JUMP instruction) for each algorithm processing. This allows IRAM2
One of the algorithms MA1 and MA2 stored in 23 is called and the process is executed.

<Second Method> The second method (illustrated in parentheses in FIG. 8) is a method applied when the processing capability of the DSP processing unit 22 is small. When the processing capacity of the DSP processing unit 22 is small, an algorithm is not prepared in advance in the DSP processing unit 22, and after the data type is discriminated by the preprocessor 225, a necessary algorithm is determined by the CPU processing unit 21 according to the data type. DS from RAM211 etc.
It is loaded into the IRAM 223 of the P processing unit 22.

When such a method is adopted, it takes time to load the algorithm on the DSP processing unit side. Therefore, until the loading is completed, the data to be processed (audio data or content data) is stored in the RAM area (I
(RAM 223, EXRAM 224, etc.), and when the algorithm is completely loaded, the data is read from the RAM area and the processing is executed.

As described above, also in the present embodiment, since the DSP processing algorithm is changed according to the processing target, even if the processing target changes, the algorithm according to the processing target is selected. It is possible to obtain excellent effect effects.

In the first method, since the distribution processing is performed within the DSP, it is possible to perform signal processing while switching algorithms at high speed. The second method is a method in which the algorithm is loaded on the DSP side after the data type of the processing target is discriminated, so that even a DSP having a small processing capacity can handle it.

{Sixth Embodiment} Next, a sixth embodiment of the present invention will be described with reference to FIG. Note that description of the same content as that described in the above-described embodiment will be omitted.

In this embodiment, the mobile phone 1
Uses the divider program 45 stored in the memory (RAM 211, ROM 212, etc.) to perform distribution processing according to the data type of the received data.

Data (packets) which the mobile phone 1 sequentially receives via the communication unit 11 are stored in the buffer memory 23 (RA).
M211 or the like may be used) to be loaded into the DSP processing unit 22. At this time, the algorithm storage unit 2
According to the algorithm stored in 21, for example, a sound (image) expansion process or the like is performed.

Then, as shown in the figure, markers 40 are added to the data (packets) that the mobile phone 1 sequentially receives via the communication section 11. That is,
Audio (image) content data 4 received by the mobile phone 1
Packet containing 2, packet containing algorithm MA,
A marker 40 is added to each packet including the parameter MP. Therefore, the CPU processing unit 21
The divider program 45 operating above can determine the data type by referring to the marker 40.

When the divider program 45 determines the data type, it sends a processing command corresponding to the data type to the DSP processing section 22. Or Divider Program 45
Sends an instruction to change the RAM address to be accessed to the DSP processing unit 22. In response to an instruction from the divider program 45, the DSP processing unit 22 causes the IRA
The algorithm stored in M223 or the like is executed while switching.

Alternatively, the decompression processing algorithm executed in the DSP processing unit 22 may refer to the marker 40 and the DSP processing unit 22 may change the algorithm by internal processing.

According to this embodiment, it is not necessary to download a program such as JAVA (registered trademark) as in the above-described embodiment, and the sound (image) is modulated during communication. It is possible to change the DSP algorithm and parameters of the above one after another and execute them.

{Modified Example} In each of the above-described embodiments, the control unit 20 includes the CPU 210 and the DSP 220.
High-speed CPU, which is configured with two processing chips
When the above is used, the present invention can be realized by using a high speed CPU.

That is, in the above-mentioned embodiment,
A CPU processing unit 21 that performs overall control of the mobile phone 1, and a DSP processing unit 2 that performs voice expansion processing and various effect processing.
Although the CPU 2 is configured to share the processing, one CPU chip can execute the processing of the present invention when the processing capacity of the CPU processing unit 21 is high. In this case, the algorithm storage unit 221, the parameter storage unit 222, the internal / external memory (IRAM, EXRAM), etc. of the DSP processing unit 22 described in the above-described embodiment uses the RAM 211 or the like of the CPU processing unit 21. Will be realized. Alternatively, a dedicated RAM may be provided.

The above embodiment has been described by taking the case where the digital signal processing of the present invention is realized in a mobile phone as an example. However, the present invention can be widely applied to other portable information terminals (PDA),
It can be applied to "voice / image content reproducing terminal" capable of communication such as game consoles, car navigation systems and PCs.

[0113]

As described above, according to the first and third aspects of the invention, the algorithm data defining the processing contents of the digital signal processing means and the loader program for installing the algorithm data in the digital signal processing means are provided. Since the information is acquired through communication, it is possible to easily change the processing content of the digital signal processing means.

According to the second aspect of the invention, the digital signal processing means is composed of a DSP, and the digital signal processing is performed at high speed.

According to the fourth aspect of the invention, since the loader program also includes a module for downloading the algorithm data, it is possible to easily change the processing content of the digital signal processing means by downloading the loader program. .

According to the fifth aspect of the invention, the loader program is an execution module that does not depend on the platform. Therefore, it is possible to change the processing content of digital signal processing in a highly versatile mechanism.

According to the sixth and seventh aspects of the invention, the parameters of the algorithm are also downloaded, so that the processing contents of the digital signal processing can be operated in detail.

In the invention described in claim 8, since the application program for controlling the digital signal processing is also downloaded, it is possible to execute various digital signal processing in the electronic equipment having the basic hardware configuration and the basic software. Is.

Since the invention described in claim 9 executes all the processes by the CPU, it can have a simple structure.

According to the tenth aspect of the invention, since the algorithm data is acquired via the storage medium, it is possible to change the digital signal processing.

According to the eleventh aspect of the present invention, since the parameter is acquired via the storage medium, detailed operation of digital signal processing can be performed.

According to the twelfth aspect of the present invention, since the algorithm data and the content data are distributed via the storage medium, the content to be reproduced and the processing content at the time of reproducing the content can be acquired at the same time. is there. Conversely, the content distributor can convey the reproduction intention.

According to the thirteenth aspect of the present invention, since a plurality of pieces of algorithm data are held and the algorithm is switched according to the operating state of the electronic device, it is possible to obtain the digital signal processing effect according to the processing target.

According to the fourteenth, fifteenth, and seventeenth aspects of the present invention, since the algorithm is selected from the supplementary information added to the data, it is possible to execute digital signal processing according to the intention of the data creator. Is.

According to the sixteenth aspect of the present invention, the algorithm is switched between the communication and the reproduction, so that a more practical control can be executed.

The invention described in claims 18 and 19 is
It is an invention of a method, and it is possible to effectively switch digital signal processing.

[Brief description of drawings]

FIG. 1 is a functional block diagram of an electronic device (mobile phone) according to an embodiment.

FIG. 2 is a conceptual diagram showing the gist of the present embodiment.

FIG. 3 is a conceptual diagram showing the gist of the present embodiment.

FIG. 4 is a diagram showing a digital processing method according to the first embodiment;

FIG. 5 is a diagram showing a digital processing method according to a second embodiment.

FIG. 6 is a diagram showing a digital processing method according to a third embodiment.

FIG. 7 is a diagram showing a digital processing method according to a fourth embodiment.

FIG. 8 is a diagram showing a digital processing method according to a fifth embodiment.

FIG. 9 is a diagram showing a digital processing method according to a sixth embodiment.

FIG. 10 is a block diagram showing a voice modulation process using a DSP.

FIG. 11 is a block diagram showing a voice compression / decompression process using a DSP.

FIG. 12 is a block diagram showing content reproduction processing using a DSP.

FIG. 13 is an image diagram showing plug-in software.

[Explanation of symbols]

1 Mobile phones (electronic devices) 11 Communications Department 12 speakers 13 microphone 20 Control unit 21 CPU processing unit 211 RAM 22 DSP processor 221 Algorithm storage unit 222 Parameter storage 223 IRAM 224 EXRAM

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5D045 AB26 DA20                 5K067 AA21 BB04 BB21 DD11 DD51                       EE02 EE07 EE16 FF02 HH17                       HH22 KK15                 5K101 LL12

Claims (19)

[Claims] 1. An electronic device used for a predetermined purpose while processing a digital signal, comprising: a communication means, an overall control means for performing overall control of the electronic device; Digital signal processing means for changing the characteristics of the digital signal, wherein the overall control means defines the processing contents of the digital signal processing means from a server existing on the network via the communication means. It is provided with an algorithm data and a means for obtaining a loader program for installing the algorithm data in the digital signal processing means, and it is possible to change the processing content of the digital signal processing means. Electronic equipment that performs digital signal processing. 2. The electronic device for performing digital signal processing according to claim 1, wherein the overall control unit means is a CPU (Central Processing Unit).
nit), and the digital signal processing means is a circuit group including a DSP (Digital signal processor). An electronic device that performs digital signal processing. 3. The electronic device for performing digital signal processing according to claim 1, wherein the overall control unit further includes a storage unit that stores the acquired algorithm data and the loader program. The digital signal processing means includes an algorithm storage means for storing algorithm data corresponding to processing contents, and the loader program stores the algorithm data acquired by the overall control means and stored in the storage means in the algorithm storage means. An electronic device that performs digital signal processing, characterized by executing installation processing by storing in an electronic device. 4. The electronic device for performing digital signal processing according to claim 1, wherein the loader program acquires the algorithm data from a server existing on a network via the communication unit. A module for performing the acquisition process of the algorithm data, and the installation process of the algorithm data by the loader program by the overall control means to obtain the loader program. An electronic device that performs digital signal processing. 5. The electronic device for performing digital signal processing according to claim 1, wherein the loader program is a platform independent execution module and performs digital signal processing. Electronics. 6. The electronic device for performing digital signal processing according to claim 1, wherein the overall control unit further includes the algorithm from a server existing on a network via the communication unit. A means for acquiring a parameter that is a set value for adjusting the processing content specified by the data,
An electronic device that performs digital signal processing, including: 7. The electronic device that performs digital signal processing according to claim 6, wherein the digital signal processing unit further includes a parameter storage unit that stores a current algorithm setting value, and the loader program includes: An electronic device for performing digital signal processing, characterized by executing a process of storing the parameter acquired by the overall control unit in the parameter storage unit. 8. The electronic device for performing digital signal processing according to claim 1, wherein the overall control unit further includes a server existing on a network via the communication unit and the electronic device. An electronic device for performing digital signal processing, characterized in that the processing in the digital signal processing unit is controlled by the application program executed by the overall control means. . 9. The electronic device for performing digital signal processing according to claim 1, wherein the overall control unit means and the digital signal processing means are realized by one high-speed CPU. Electronic equipment to do. 10. An electronic device used for a predetermined purpose while processing a digital signal, comprising: a storage medium reading means, an overall control means including a CPU for performing overall control of the electronic equipment, and an input digital signal. A digital signal processing unit including a DSP that performs a process of changing a characteristic of the digital signal with respect to a signal, wherein the overall control unit is stored in a storage medium via the storage medium reading unit. An electronic device for performing digital signal processing, comprising: means for acquiring algorithm data defining the processing content of the digital signal processing means, wherein the processing content of the digital signal processing means can be changed. 11. The electronic device for performing digital signal processing according to claim 10, wherein the overall control means further processes the digital signal processing means stored in the storage medium together with the algorithm data. An electronic device for performing digital signal processing, comprising means for acquiring a parameter that is a set value for adjusting the content. 12. The electronic device for performing digital signal processing according to claim 10 or 11, wherein the overall control unit is further used together with the algorithm data for reproduction stored in the storage medium. An electronic device for performing digital signal processing, comprising: means for acquiring content data. 13. An electronic device which is used for a predetermined purpose while processing a digital signal, the overall control means including a CPU which controls the entire electronic device, and the digital signal corresponding to an input digital signal. A digital signal processing unit including a DSP that performs a process of changing a signal characteristic, the overall control unit stores a plurality of algorithm data that defines processing contents of the digital signal processing unit; Digital signal processing, comprising: selecting appropriate algorithm data from the plurality of algorithm data according to an operating state of an electronic device, and loading the selected algorithm data into the digital signal processing unit. Electronic devices that do. 14. The electronic device for performing digital signal processing according to claim 13, wherein the overall control means further selects from communication means and incidental information added to data received via the communication means. An electronic device for performing digital signal processing, comprising: means for selecting algorithm data to be processed. 15. The electronic device for performing digital signal processing according to claim 14, wherein the plurality of pieces of algorithm data are loaded in the digital signal processing unit in advance, and a preprocessor of the digital signal processing unit is used for the additional information. An electronic device that performs digital signal processing, characterized in that it selects algorithm data to be selected, and executes digital signal processing while switching the algorithm data. 16. An electronic device for performing digital signal processing according to claim 14 or 15, wherein the electronic device executes a communication process using the communication means and a reproduction process for reproducing audio or image data. An electronic device that performs digital signal processing, characterized in that the algorithm data is switched and executed during communication processing and reproduction processing. 17. The electronic device for performing digital signal processing according to claim 14, wherein the electronic device is added to communication data to be received in a communication process using the communication means. An electronic device for performing digital signal processing, characterized in that an algorithm for a signal received in a communication process is sequentially switched and executed while referring to supplementary information. 18. A method of processing a digital signal, which is executed by an electronic device used for a predetermined purpose, wherein the electronic device includes a communication unit and a general control unit including a CPU that controls the entire electronic device. And a digital signal processing unit including a DSP that performs a process of changing the characteristics of the digital signal with respect to the input digital signal, wherein the method includes a server existing on a network via the communication unit, Acquiring algorithm data defining the processing contents of the digital signal processing means and a loader program for installing the algorithm data in the digital signal processing means, and executing the loader program acquired by the overall control means. By doing so, the obtained algorithm data is transferred to the digital signal processing means. Digital signal processing method characterized by comprising the steps of installation, a. 19. A method of processing a digital signal executed by an electronic device used for a predetermined purpose, wherein the electronic device includes an overall control unit including a CPU for performing overall control of the electronic device. A digital signal processing unit including a DSP that performs a process of changing a characteristic of the digital signal with respect to the digital signal; A step of storing a plurality of algorithm data to define, a step of determining the operating state of the electronic device, depending on the operating state of the electronic device, select appropriate algorithm data from the plurality of algorithm data, A step of installing the selected algorithm data in the digital signal processing means. No. treatment method.