JP2000299664A - Data processing device and storage medium storing data processing program - Google Patents

Abstract

(57) [Problem] To easily expand and decompress and reproduce even a data-compressed file transferred from a personal computer in a portable terminal device. For example, an audio-video file having a maximum compression level downloaded via a network N via a communication unit 17 is:
When a portable terminal device 20 which is a slave unit of the personal computer 10 is connected via the portable terminal communication unit 16 while being stored in the audio / video file area 13h in the memory 13, the terminal 20 performs a decompression process. The data compression level of the possible file is determined, and if the compression level of the audio / video file stored in the file area 13h is higher than the compression level at which the decompression processing is possible, the audio / video file is After being once decompressed and decompressed in accordance with the processing program 13d, it is compressed again according to the data compression level that can be decompressed by the terminal 20, and the mobile terminal communication unit
The data is transmitted and transferred to the portable terminal device 20 via 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus for compressing and taking in data such as an audio file and an image file, expanding and reproducing and outputting the data, and a storage medium storing a data processing program.

[0002]

2. Description of the Related Art In recent years, data compression techniques for audio files and image files have been remarkably advanced. For example, MPEG (moving pi), which is a typical data compression technique, has been developed.
cturecoding experts group) provides three levels of compression schemes with different compression ratios from layer to layer.

[0003] The Internet and DVD (digital
The data and music files provided by the video disc are compressed and downloaded to a personal computer, and the compressed data is decompressed and decompressed by the data compression and decompression hardware and software provided on the personal computer. In addition, reproduction and output as music or moving images are generally performed.

At this time, in a personal computer, it is easy to perform high-speed data compression / decompression processing by software using a high-performance CPU or by using dedicated hardware. Even a compressed file can be expanded and decompressed at a necessary and sufficient speed and reproduced.

On the other hand, music files and moving image files, which have been compressed and downloaded from the Internet or the like to a personal computer, are further added to a PDA (per
It is also becoming practical to transfer the data to a portable terminal device such as a sonal digital assistant to reproduce sound and images on the portable terminal device.

[0006]

However, in the portable terminal device, it is important to reduce the size, power consumption, and price, and the processing capability of the CPU is lower than that of the personal computer. It is also difficult to equip the hardware, and power consumption is high even in consideration of miniaturization, so it is easy to expand and decompress the music image file of the maximum compression level transferred from the personal computer and play it. There is a problem that can not be.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. For example, it is possible to easily expand and decompress and reproduce a compressed file transferred from a personal computer in a portable terminal device. It is an object of the present invention to provide a data processing apparatus and a storage medium storing a data processing program.

[0008]

That is, a first data processing apparatus according to the present invention is a data processing apparatus having a communication function, and includes a file storage means for storing compressed file data, and a communication partner. Compression level determining means for determining a compression level which can be processed; and a compression level for changing a compression level of file data stored in the file storage means to a compression level which can be processed by a communication partner determined by the compression level determining means. And a file transmitting means for transmitting, to the communication partner, file data whose compression level has been changed to a level which can be processed by the communication partner by the compression level changing means.

In the first data processing apparatus, the compression level that can be processed by the communication partner is determined, and the compression level of the file data stored in the file storage unit is determined by the communication partner of the determined level. Since the file data is changed to a compression level that can be processed and the file data that has been changed to a compression level that can be processed by the communication partner is transmitted to the communication partner, the file storage means of the first data processing device (for example, a personal computer) Even if the compression level of the file data stored in the storage device is the maximum compression level, the file data can be transferred to a data processing device (for example, a portable terminal device) of the communication partner and easily expanded and decompressed and output.

A second data processing apparatus according to the present invention is a data processing apparatus having a communication function, comprising: a data decompression means for decompressing compressed file data; Sample file receiving means for receiving a plurality of compressed sample files in an order according to the compression level, sample file expanding means for expanding each sample file received from a communication partner by the sample file receiving means, Processing result transmitting means for transmitting the result of the decompression processing for each of the sample files by the sample file decompression means to the communication partner, and a compression level transmitted from the communication partner in accordance with the decompression processing result and which can be expanded by the data decompression means File reception to receive compressed file data And the step, characterized in that a file output means for outputting the file data expanded by said data expanding means.

In the second data processing apparatus, when a plurality of sample files respectively compressed at a plurality of compression levels are received from a communication partner in an order corresponding to the compression levels, each of the received sample files is received. The sample files are decompressed by the data decompression means, and the result of the decompression processing for each of the sample files by the decompression means of the sample file is transmitted to the communication partner. Then
According to the result of the decompression processing, file data compressed to a compression level expandable by the data decompression means of the second data processing apparatus is received from the data processing apparatus of the communication partner, and the received file data is transmitted to the data decompression means. Is expanded and output by the second data processing device (for example, a portable computer) even if the data compression level of the file data stored in the data processing device (for example, personal computer) of the communication partner is the maximum compression level. In the terminal device), the file data transferred from the communication partner can be easily expanded and decompressed and output.

A third data processing apparatus according to the present invention comprises a file input means for inputting file data, and a first compression / expansion means having a low processing speed for compressing / expanding file data and having low power consumption. A second compression / decompression unit which has a high processing speed for compressing and decompressing file data and consumes a large amount of power; a first compression / decompression unit in accordance with the contents of the file data input by the file input unit; And a file output unit that outputs file data expanded by the first compression / expansion unit or the second compression / expansion unit.

In the third data processing apparatus, the first compression / expansion means having a low compression / expansion processing speed and low power consumption, and the compression / expansion, according to the contents of the file data input by the file input means. Switching between the second compression / expansion means having a high processing speed and large power consumption is performed, and the file data expanded by the first compression / expansion means or the second compression / expansion means is output. Simple file data such as images are efficiently processed by the first compression / expansion means (software processing), and complicated file data such as audio sound and moving images are efficiently processed by the second compression / expansion means (hard processing). Compression / expansion processing can be performed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an electronic circuit of a personal computer (personal computer) 10 according to an embodiment of the data processing apparatus of the present invention.

The personal computer 10 has a CP
A control unit 11 made of U is provided.

The control unit 11 activates a system program stored in advance in a memory 13 such as a ROM or a RAM such as a semiconductor or a hard disk in response to an operation input signal from an input unit 12 such as a keyboard or a mouse. It starts a personal computer control program stored in an external storage medium 15, such as a floppy disk, which is read via a storage medium reading unit 14, such as a magnetic disk device, and controls the operation of each circuit unit.

The control unit 11 is connected to the input unit 12, the memory 13, and the storage medium reading unit 14, and also connected to the portable terminal communication unit 16, the communication unit 17, the display unit 18, and the audio output unit 19. Is done.

The portable terminal communication unit 16 serves as a communication interface with a portable terminal device 20 such as a PDA externally connected to the personal computer 10. The portable terminal communication unit 16 communicates with the portable terminal device 20 via the portable terminal communication unit 16. Data download and upload (mutual data transfer) are performed as necessary.

The communication unit 17 has a LAN (local area network).
k), a WAN (wide area network), a communication interface with another computer 10a externally connected via a communication network N such as the Internet,
Data download and upload (mutual data transfer) are performed as necessary with each computer 10a on the network N via the communication unit 17.

The display unit 18 is a CRT (cathode-ray tube)
Alternatively, an LCD (liquid crystal display) is used, and character data and image data are displayed in accordance with the respective operation modes in accordance with the display control operation in the control unit (CPU) 11.

The audio output section 19 includes a speaker and an earphone jack. An audio signal is amplified and reproduced according to an audio output control operation of the control section (CPU) 11, and is output.

On the other hand, in the memory 13, a system program 13a for controlling the overall operation of the personal computer 10 is stored in advance, and the communication unit 17 communicates with the external computer 10a via the network N. Network communication processing program 13b for controlling the communication operation in the portable terminal, portable terminal communication processing program 13c for controlling the communication operation between the portable terminal communication unit 16 and the external portable terminal device 20, voice data file and image Audio / video compression / decompression processing program 13 for compressing / decompressing data in a data file
d, an audio image output processing program 13e for controlling an image display operation on the display unit 18 and an audio output operation on the audio output unit 19, and an external program via the portable terminal communication unit 16 and the communication unit 17 Mobile terminal device 2
0 and an audio / video data transmission processing program 13f for transmitting audio / image data to another computer 10a are stored in advance.

The memory 13 includes a compression level table 13g which can be processed by each terminal, an audio / video file area 13h, and a sample file area 13i. A work area 13j is provided for temporarily storing and holding various data input and output.

The compression level table 1 which can be processed by each terminal
3g are respectively associated with terminal numbers (terminal IDs) 1, 2,..., Which are unique to the plurality of mobile terminal devices 20 connected via the mobile terminal communication unit 16, respectively. Stores a data compression level that can be handled (expanded and decompressed).

In the audio image file area 13h,
For example, the external storage medium 15 such as a DVD downloaded from the communication unit 17 from another computer 10a via the network N or the storage medium reading unit 14
The data of audio files and image files such as music and moving images read from the PC are stored in association with the respective file names and the data compression levels.

In the sample file area 13i,
Portable terminal device 2 connected via portable terminal communication unit 16
0, and data compression sample data for detecting a data compression level that can be expanded and decompressed within a predetermined time in the portable terminal device 20 is provided for each compression level 1, 2, 3,. It is stored in advance.

FIG. 2 is a block diagram showing a configuration of an electronic circuit of a portable terminal device 20 externally connected to a personal computer 10 according to an embodiment of the data processing device of the present invention.

The portable terminal device 20 has a control unit 21 composed of a CPU.

The control unit 21 activates a system program stored in advance in a memory 23 such as a semiconductor or a hard disk such as a ROM or a RAM in response to an operation input signal from an input unit 22 such as a key or a tablet. It starts a portable terminal control program stored in an external storage medium 25 such as a floppy disk read through a storage medium reading unit 24 such as a magnetic disk device, and controls the operation of each circuit unit.

The control section 21 is connected to the input section 22, the memory 23, and the storage medium reading section 24, as well as the personal computer communication section 26, the display section 27, and the audio output section 28.

The personal computer communication section 26 serves as a communication interface with the personal computer 10 as a master unit to which the portable terminal device 20 is connected as a slave unit.
Data is downloaded and uploaded (mutual data transfer) with the personal computer 10 in FIG. 1 via the personal computer communication unit 26 as necessary.

The display unit 27 is a liquid crystal display (LCD).
splay), and character data and image data are displayed in accordance with the respective operation modes according to the display control operation in the control unit (CPU) 21.

The audio output unit 28 includes a speaker and an earphone jack. An audio signal is amplified and reproduced according to an audio output control operation of the control unit (CPU) 21 and output.

On the other hand, in the memory 23, a system program 23a for controlling the overall operation of the portable terminal device 20 is stored in advance, and the personal computer communication unit 2
6, a master unit communication processing program 23 for controlling the communication operation with the personal computer (master unit) 10
b, an audio / video decompression processing program 23c for decompressing and decompressing the compressed audio data file and image data file, and controls the image display operation in the display unit 27 and the audio output operation in the audio output unit 28. Audio-video output processing program 23d for performing
An audio image data reception processing program 23e for receiving audio data and image data transmitted and transferred from the personal computer (parent device) 10 via the personal computer communication unit 26 is stored in advance.

The memory 23 has a terminal-processable compression level data area 23f and an audio / video file area 23g.
A work area 23h for temporarily storing and holding various data input / output according to various operation controls in the PU) 21 is provided.

The data compression level which can be processed (decompressed and decompressed) by the portable terminal device 20 is stored in the terminal processable compression level data area 23f.

In the sound image file area 23g,
The personal computer 1 via the personal computer communication unit 26
The data of the audio file or image file such as music or moving image transferred from 0 is stored in association with the respective file name and the data compression level. in this case,
Voice transferred from the personal computer 10
Image file data is transferred as file data of a data compression level that can be processed (expanded and decompressed) in the portable terminal device 20 stored in the terminal processable compression level data area 23f.

Next, the transfer function of the audio / image file between the personal computer 10 and the portable terminal device 20 of the data processing apparatus having the above-described configuration will be described.

FIG. 3 is a flowchart showing the audio / video data transmission processing in the personal computer 10.

That is, the operation mode of the control unit (CPU) 11 is selectively set to the audio / video data transmission mode in accordance with the user operation on the input unit 12, and the audio / video data transmission processing program 1 stored in the memory 13 in advance
When 3f is activated, it is determined whether or not an external portable terminal device 20 is connected to the portable terminal communication unit 16 (step S1).

Here, when it is determined that the portable terminal device 20 is not connected to the portable terminal communication unit 16, a connection request message of the portable terminal device 20 to which the audio / video data is to be transmitted is transmitted. It is displayed on the display unit 18 (step S1 → S2).

Thus, when the portable terminal device 20 as the transfer destination of the audio / video data is connected to the portable terminal communication unit 16, the terminal-specific information transmitted from the connected portable terminal device 20 is transmitted. The terminal number (ID) is received, and it is determined whether the decompressible data compression level corresponding to the terminal number of the connected portable terminal device 20 exists in the terminal-specific processable compression level table 13g in the memory 13. (Steps S1 → S3, S4).

Here, the connected portable terminal device 20
If it is determined that the decompressible data compression level corresponding to the terminal does not exist in the terminal-by-terminal processable compression level table 13g, the portable terminal device 20 is notified of the present terminal processable compression level in its memory 23. A request for reading and transmitting the decompressible data compression level data stored in the level data area 23f (see FIG. 2) is requested (transmitted) (steps S4 → S5).

When the data compression level data which can be decompressed by the terminal device 20 and which is read out from the terminal processable compression level data area 23f of the connected portable terminal device 20 and transmitted, is received. The received decompressible compression level data is stored in the processable compression level table 13g for each terminal in the memory 13 in association with the terminal number received in step S3 (steps S6 → S7).

On the other hand, if the portable terminal device 20 does not receive the decompressible data compression level data in step S6, the process proceeds to the processable compression level detection process in FIG. 4 (step S6 → SA). .

FIG. 4 is a flowchart showing a processable compression level detection process accompanying the audio / video data transmission process of the personal computer 10.

That is, in step S6 in the audio / video data transmission process, the portable terminal device 2 being connected
0 is determined to have no information on the data compression level that can be decompressed by the terminal itself, and when the process shifts to the processable compression level detection process, the start of the processable compression level detection process is started. It is notified to the connected mobile terminal device 20, and it is determined whether or not a response signal has been received (steps A1 and A2).

When a response signal to the personal computer 10 is received in response to the notification of the start of the processable compression level detection process to the connected portable terminal device 20,
First, the detection target compression level P is set to 1 (lowest), and the sample file 1 of the compression level 1 is read from the sample file area 13i and transmitted to the portable terminal device 20 (steps A3 and A4).

On the other hand, when the decompression processing result of the sample file 1 of the compression level 1 returned from the portable terminal device 20 is received, it is determined whether or not the processing result is received as being decompressible. (Steps A5 and A
6).

When it is determined that the result of the decompression process for the sample file 1 of the compression level 1 in the portable terminal device 20 is received, the present detection target compression level P is set. It is determined whether or not the maximum compression level has been reached, and if it is not the maximum compression level, the detection target compression level P is incremented by (+1) and is set to P = 2 (compression level 2) (step). A6 → A7 → A8).

Then, the sample file 2 of the compression level 2 is read from the sample file area 13i and transmitted to the portable terminal device 20 (step A4).

That is, by repeating the processing in steps A4 to A8, the data compression level P becomes 1
.., And the corresponding sample files 1, 2, 3,... Are sent to the portable terminal device 20, and the sent sample files 1, 2, 3,.
It is determined whether or not the result of the decompression process can be processed. For example, when the detection target compression level P is set to P = 3, the sample file 3 of the compression level 3 is transmitted to the portable terminal device 20. If it is determined that the result of the decompression process received from the mobile terminal device 20 is not processable, the detection target compression level P = 3 determined to be unprocessable is decremented by (−1). Previous sample file 2
Is set down to the detection target compression level P = 2, which is determined to be processable with the transmission of (A6 → A)
9).

Then, according to the processing of steps A3 to A9, whether or not the current detection target compression level P determined as the highest compression level at which expansion processing can be performed in the portable terminal device 20 is "0", that is, Minimum compression level P
It is determined whether the decompression process is not possible even for the sample file 1 of = 1, and if it is determined that P = 0, the process proceeds to error processing (step A10 → error processing).

On the other hand, in step A10, for example, the current detection target compression level P is set to P = 2, and P = 0 is not satisfied, that is, the currently connected portable terminal device 20 is set.
Determines that the audio and image files up to the compression level 2 can be decompressed.
In the case where it is determined that the current detection target compression level P has reached the maximum compression level, the highest data compression level that can be processed by the portable terminal device 20 set as the current detection target compression level P Is stored in the terminal-specific processable compression level table 13g in the memory 13 in association with the terminal number (step A1).
0 → A11 or A7 → A11).

Then, at the end of the series of processable compression level detecting processes, the processable compression level P of the connected mobile terminal device 20 detected and stored in the detection process is changed to the connected mobile terminal device. 20 is notified (steps A12 and A13).

In this way, through the processable compression level detecting process (step SA), the connected portable terminal device 20
The data compression level that can be decompressed is detected and saved in the terminal-by-terminal processable compression level table 13g in the memory 13 or through the processing of steps S5 to S7,
The processable compression level data of the terminal device 20 already stored in the present terminal processable compression level data area 23f of the connected portable terminal device 20 is received, and the terminal-specific processable compression level table 13g in the memory 13 is received. Or it is determined that the processable compression level corresponding to the connected portable terminal device 20 is already stored in the terminal-specific processable compression level table 13g in the memory 13 after the step S4. If so,
The processable compression level corresponding to the connected mobile terminal device 20 is read from the terminal-specific processable compression level table 13g in the memory 13 (step S8).

Then, the file names of the audio image files stored in the audio image file area 13h are read out and displayed on the display unit 18 in a list. When an arbitrary audio / video file is selected in accordance with the operation, the data compression level of the selected file stored in association with the selected file name is read out. It is determined whether or not the compression level is equal to or less than the processable compression level corresponding to the connected portable terminal device 20 read from 13g (steps S9, S10, S11, S1).
2).

Here, the data compression level of the audio / video file selected by the user is set to
If it is determined that the compression level is equal to or less than the processable compression level of 0, the data of the selected audio / video file is read from the audio / video file area 13h in the memory 13 while keeping the compression level as it is, The data is transmitted and transferred to the connected mobile terminal device 20 via the mobile terminal communication unit 16 (step S12 → S13).

On the other hand, the data compression level of the user-selected audio / video file is
If it is determined that the compression level is not equal to or lower than the processable compression level and is higher, the audio / video compression / expansion processing program 13d stored in the memory 13 in advance is started and the selected audio / video After the compressed data of the file is once decompressed and decompressed, the decompressed and decompressed selected file data is stored in the connected portable terminal device 20.
(Steps S12 → S14, S15).

The selected file data recompressed according to the processable compression level of the connected portable terminal device 20 is transmitted to the portable terminal device 20 via the portable terminal communication section 16. It is transferred (step S16).

FIG. 5 is a flowchart showing the audio / video data receiving process in the portable terminal device 20.

That is, the operation mode of the control unit (CPU) 21 is selectively set to the audio / video data reception mode in accordance with the user operation on the input unit 22, and the audio / video data reception processing program 2 stored in the memory 23 in advance.
When 3e is activated, it is determined whether or not the personal computer 10 serving as a parent device is connected to the personal computer communication unit 26 (step B1).

Here, when it is determined that the personal computer 10 serving as the parent device is connected via the personal computer communication unit 26, the terminal number of the portable terminal device 20 is transmitted to the personal computer 10. After
It is determined whether or not the audio / video file transmitted from the personal computer 10, which is the parent machine, has been received (steps B1 → B2, B3).

When it is determined that the audio image file transmitted from the personal computer 10 as the master unit has been received through the personal computer communication unit 26 of the portable terminal device 20, the received audio image file is determined. The file and its compression level data are stored in the audio / video file area 23g in the memory 23 (step B3 →
B4).

In this case, the data is transmitted from the personal computer 10 as the master unit,
The audio / video file received and stored in the portable terminal device 20 is compressed data in accordance with the audio / video data transmission process of the personal computer 10 in FIG.

On the other hand, when it is determined that a request for transmission of the processable compression level data in the portable terminal device 20 has been received from the personal computer 10 as the master unit, the terminal processable compression level data area in the memory 23 is determined. At 23f, it is determined whether or not a data compression level that can be expanded by the terminal device 20 is stored (step B5 → B6).

If it is determined that the data compression level that can be expanded by the terminal device 20 is stored in the compression level data area 23f of the terminal in the memory 23, The processable compression level data is read from the processable compression level data area 23f, and transmitted to the personal computer 10, which is the master unit, via the personal computer communication unit 26 (step B7 → B8).

On the other hand, if it is determined that the data compression level which can be expanded by the terminal device 20 is not stored in the terminal processable compression level data area 23f in the memory 23, the terminal device Data indicating that the 20 processable compression level data has not been saved yet is transmitted to the personal computer 10 (step B7 → B9).

If it is determined that the start notification of the processable compression level detection process described with reference to FIG. The sample file of the compression level P subsequently received is stored in the memory 23.
Stored in the work area 23h in the control unit (CPU)
The timer built in 21 is started (steps B10 → B11, B12).

Then, the personal computer 10
The sample file of the compression level P received from the storage area 23h and stored in the work area 23h,
Is started to start the decompression and decompression processing. In association with this, the compression target compression level in the activated audio-video decompression processing program 23c is set to the data of the sample file received and stored from the personal computer 10. It is determined whether or not the compression level is supported (steps B13 and B14).

Here, it is assumed that the compression level to be decompressed in the audio / video decompression processing program 23c started by the portable terminal device 20 corresponds to the data compression level of the sample file received and stored from the personal computer 10. If determined, the time from the start of the timer required for the decompression / decompression processing on the sample file is measured, and it is determined whether the time required for the decompression / decompression processing is equal to or shorter than a predetermined time (step B14 → B1).
5, B16).

If it is determined that the time required for the decompression / decompression processing of the sample file is equal to or shorter than the predetermined time, the data of the processing result received from the personal computer 10 and stored indicating that the sample file can be decompressed. Is generated and transmitted to the personal computer 10 as the parent device via the personal computer communication unit 26 (steps B16 → B17, B18).

On the other hand, in the step B14, the compression level to be decompressed in the audio / video decompression program 23c started by the portable terminal device 20 corresponds to the data compression level of the sample file received and stored from the personal computer 10. If it is determined that the sample file has not been decompressed, or if it is determined in step B16 that the time required for the decompression and decompression processing of the sample file has not exceeded the predetermined time but has exceeded the predetermined time, the decompression of the sample file has been performed. The data of the processing result indicating the impossibility is generated and transmitted to the personal computer 10, which is the parent machine, via the personal computer communication unit 26 (step B19 →
B18).

When the processing result indicating that the sample file can be decompressed is returned to the personal computer 10 which is the parent machine through the step B17, the process of detecting the available compression level from the personal computer 10 is completed. No notification is made, and the compression level P is higher than the sample file determined to be decompressable this time.
Is received and stored from the personal computer 10, and the decompression and decompression processing and the processing result return processing by the audio / video decompression processing program 13c stored in the memory 23 are repeated in the same manner as described above (steps B17, B18, and B20). → B11-B19) Then, when the decompression / decompression processing based on the reception and storage of the sample file of a certain compression level P from the personal computer 10 is repeated, the decompression of the sample file of the compression level P is performed through the step B19. When the data of the processing result indicating the impossibility is returned to the personal computer 10 which is the parent machine, after that, the end notification of the processable compression level detection processing transmitted from the personal computer 10 is received, and Based on the return of the decompression processing result, The processable compression level P of the portable terminal device 20 determined and stored by the null computer 10 is received and stored in the terminal processable compression level data area 23f in the memory 23 (steps B19 → B18, B20 → B21, B22).

Then, in step B3, the personal computer 10 waits for reception of an audio / video file having a data compression level corresponding to the terminal processable compression level P.

Therefore, according to the audio / video data transmission function of the personal computer 10 in the data processing apparatus having the above configuration, the audio / video file of the maximum compression level downloaded via the Internet via the communication unit 17 is stored in the memory 13. When the portable terminal device 20 which is a child device of the personal computer 10 is connected via the portable terminal communication unit 16 in a state where the portable terminal device 20 is stored in the audio image file area 13h, the portable terminal device 20 can perform the decompression process. If the data compression level of the audio / video file stored in the audio / video file area 13h is higher than the data compression level that can be expanded, the audio / video file is Once decompressed and decompressed according to the image compression and decompression processing program 13d After that, the data is compressed again according to the data compression level that can be decompressed by the portable terminal device 20 and transmitted to the portable terminal device 20 via the portable terminal communication unit 16. Even if the portable terminal device 20 has a lower processing capability of the CPU and does not have hardware for data compression and decompression, the music image file of the maximum compression level downloaded to the personal computer 10 can be easily converted. It can be expanded and decompressed and played.

According to the audio / video data transmission function of the personal computer 10 of the data processing device having the above-described configuration, the compression level at which the portable terminal device 20 connected via the portable terminal communication section 16 can be expanded is stored in the memory 13. Even if it is not stored in the terminal-specific processable compression level table 13g or cannot be obtained from the portable terminal device 20 itself, the sample file area 13i
Are transmitted to the portable terminal device 20 sequentially from the sample file 1 of the lowest compression level 1 to the portable terminal device 20. Files 1, 2,
3 receives the result data of the decompression process in the portable terminal device 20 and detects the data compression level at which the decompression process can be performed in the connected portable terminal device 20 based on the received data. Even if the data compression level that can be decompressed is unknown, it is possible to easily determine the processable compression level of the terminal device 20.

Further, according to the audio / video data receiving function of the portable terminal device 20 in the data processing device having the above configuration,
An audio / video file compressed according to a data compression level that can be expanded by the audio / video expansion program 23c in the memory 23 is received from the personal computer 10 connected as the parent device via the personal computer communication unit 26, and the audio is output. Saved in the image file area 23g,
The received and saved audio / video file is decompressed and decompressed in accordance with the audio / video decompression processing program 23c and output by the audio output unit 28 and the display unit 27, so that the audio / video file downloaded to the personal computer 10 is Regardless of the level of the data compression level, the portable terminal device 20 can easily expand and decompress the audio / video file further transferred from the personal computer 10 and output it.

Further, according to the audio / video data receiving function of the portable terminal device 20 in the data processing device having the above-described configuration, each sample file of a plurality of compression levels transmitted from the personal computer 10 connected as the master unit is read. The sample files of the lowest compression level are sequentially received and subjected to decompression and decompression processing, and if the decompression and decompression of the sample files of each compression level can be decompressed and decompressed within a predetermined time, processing result data indicating decompression is possible. ,
When the data is decompressed and decompressed for more than a predetermined time, the processing result data indicating that the data cannot be decompressed is returned to the personal computer 10.
The personal computer 10 can easily detect the data compression level at which the decompression process can be performed.

Note that, in the portable terminal device 20 in the data processing device of the above embodiment, the personal computer 1
By adjusting the audio / video file transferred and received from the personal computer 10 to the data compression level that can be expanded in the mobile terminal device 20 on the personal computer 10 side, for example, the mobile terminal device 20 that does not use a high-performance CPU
However, the configuration is such that the audio image file transferred and received can be easily expanded and decompressed and output by the software of the audio image expansion processing program 23c. However, as will be described with reference to FIG. Switch between compression and decompression processing by software and compression and decompression processing by hardware according to the data content and compression format of audio and video files transferred and received from May be performed.

FIG. 6 is a block diagram showing a configuration of a data input / output processing unit of a portable terminal device externally connected to a personal computer 10 according to another embodiment of the data processing device of the present invention.

This portable terminal device has a CPU 31.

The CPU 31 uses a RAM (1) 33 as a work memory in accordance with a program stored in the ROM 32 in advance and performs arithmetic processing by software. The CPU 31 is connected to the DSP (digital s) in parallel.
An ignal processor 34 is provided.

The DSP 34 uses the RAM (2) 35 as a work memory in accordance with the arithmetic process loaded from the CPU 31, and performs high-speed arithmetic processing by hardware.

The power supply voltage to the DSP 34 and the RAM (2) 35 is supplied / cut off by a power supply control unit 36 in accordance with a command from the CPU 31.

On the other hand, for example, an audio signal input from a personal computer 10 externally connected as a master unit is
The signal is A / D-converted by a CODEC circuit 39 via an input amplifier 37 and a filter 38, and sent to the CPU 31 or DSP 34 via a CODEC switching circuit 40.

The audio data subjected to the data compression processing in accordance with the arithmetic processing by the software in the CPU 31 is stored in the RAM (1) 33.

The audio data compressed according to the high-speed arithmetic processing by the hardware in the DSP 34 is stored in the RAM (1) 33 by the CPU 31.

The audio data compressed and stored in the RAM (1) 33 is decompressed and decompressed in accordance with arithmetic processing by software in the CPU 31 or high-speed arithmetic processing by hardware in the DSP.
The data is sent to the CODEC 39 via the CODEC switching circuit 40 and is subjected to D / A conversion.

Then, a sound is output from the speaker 43 via the filter 41 and the output amplifier 42.

The CODEC switching circuit 40 is switched to the CPU 31 when the audio data to be subjected to the data compression processing or the data decompression processing is conversational voice, and is switched to the DSP 34 when the audio data is audio voice.
Side, that is, in the case of conversation voice data whose data content is comparatively simple, the data compression / compression is performed according to the arithmetic processing by software in the CPU 31.
Decompression is performed, and in the case of audio / audio data whose data content is extremely complicated, data compression / decompression is performed in accordance with high-speed arithmetic processing by hardware in the DSP 34 although power consumption is large.

The CODEC switching circuit 40
In the data compression / decompression processing by the software switched to the CPU 31, the power supply control unit 36 cuts off the supply of the power supply voltage to the DSP 34 and the RAM (2), thereby reducing power consumption.

Therefore, according to the data input / output function of the portable terminal device having the above-described configuration, the CPU 31 is capable of compressing and decompressing voice data such as conversational voice without requiring high-speed arithmetic processing. The compression and decompression processing is performed according to the software processing in the above, and audio data such as high-fidelity audio data that requires particularly high-speed arithmetic processing for data compression and decompression is used by the DSP 34.
Since the compression / expansion processing is performed according to the hardware processing in the above, efficient compression / expansion processing can always be performed while considering power consumption.

In the description of the data input / output processing unit of the portable terminal device in FIG. 6, the data to be compressed / decompressed is described as audio data. However, even in the case of image data, for example, only text information is used. Compression / expansion processing is performed on the simple image data configured according to the software processing in the CPU 31, and DSP is performed on the complex image data configured by the moving image.
By performing the compression / decompression processing in accordance with the hardware processing in S34, efficient compression / decompression processing can always be performed in consideration of power consumption as described above.

Also, the method described in the above-described embodiment, ie, the audio / video data transmission processing in the personal computer 10 shown in the flow charts of FIGS. 3 and 4, and the processable compression level detection processing accompanying the processing, and the flow chart of FIG. Each of the methods such as the audio / video data reception processing in the portable terminal device 20 shown in FIG. 1 includes a memory card (ROM card, RAM card, etc.), a magnetic disk (floppy (registered trademark) disk, etc),
It can be stored in an external storage medium 15 or 25 such as an optical disk (CD-ROM, DVD, etc.) or a semiconductor memory and distributed. Then, the computer operates the external storage medium 1
The programs stored in the storage media 5 and 25 are read by the storage medium reading units 14 and 24 such as a magnetic disk device, and the operation is controlled by the read programs. The receiving function can be realized, and the same audio image data processing can be performed by the above-described method.

[0097]

As described above, according to the first data processing apparatus of the present invention, the compression level which can be processed by the communication partner is determined, and the compression level of the file data stored in the file storage means is determined. Is changed to a compression level that can be processed by the communication partner whose level has been determined, and the file data that has been changed to a compression level that can be processed by the communication partner is transmitted to the communication partner. Device (eg personal computer)
Even if the compression level of the file data stored in the file storage means is the maximum compression level, the file data can be transferred to a data processing device (for example, a portable terminal device) of the communication partner and easily decompressed and output. .

According to the second data processing apparatus of the present invention, when a plurality of sample files respectively compressed at a plurality of compression levels from a communication partner are received in an order according to the compression levels, Each of the received sample files is decompressed by the data decompression means, and the result of decompression of each sample file by the decompression means of the sample file is transmitted to the communication partner. Then, file data compressed to a compression level expandable by the data decompression means of the second data processing device is received from the data processing device of the communication partner in accordance with the result of the decompression process, and the received file data is stored in the data storage device. Since the data is decompressed and output by the decompression means, even if the data compression level of the file data stored in the data processing device (for example, a personal computer) of the communication partner is the maximum compression level, the second data processing device ( For example, in a portable terminal device), the file data transferred from the communication partner can be easily expanded and decompressed and output.

Further, according to the third data processing apparatus of the present invention, the first compression / decompression processing speed is low and the power consumption is small according to the contents of the file data input by the file input means. Means and the second compression / expansion means having a high compression / expansion processing speed and high power consumption are switched, and the file data expanded by the first compression / expansion means or the second compression / expansion means is output.
For example, simple file data such as conversational voices and character images are processed by the first compression / expansion means (software processing), and complex file data such as audio voices and moving images are processed by the second compression / expansion means (hardware processing). ) Allows efficient compression / decompression processing.

Thus, according to the present invention, for example, even a data-compressed file transferred from a personal computer can be easily decompressed and decompressed and reproduced on a portable terminal device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic circuit of a personal computer according to an embodiment of a data processing device of the present invention.

FIG. 2 is a block diagram showing a configuration of an electronic circuit of a portable terminal device externally connected to a personal computer according to an embodiment of the data processing device of the present invention.

FIG. 3 is an exemplary flowchart showing audio image data transmission processing in the personal computer.

FIG. 4 is a flowchart showing a processable compression level detection process accompanying the audio / video data transmission process of the personal computer.

FIG. 5 is a flowchart showing audio image data reception processing in the portable terminal device.

FIG. 6 is a block diagram showing a configuration of a data input / output processing unit of a portable terminal device externally connected to a personal computer according to another embodiment of the data processing device of the present invention.

[Explanation of symbols]

Reference Signs List 10 personal computer (first data processing device), 10a other computer, 11, 21, 31 control unit (CPU), 12, 22 input unit, 13, 23 memory, 13a, 23a system program 13b: Network communication processing program, 13c: Portable terminal communication processing program, 13d: Audio / video compression / decompression processing program, 13e, 23d: Audio / video output processing program, 13f: Audio / video data transmission processing program, 13g: Processing per terminal Compression level table, 13h, 23g: audio image file area, 13i: sample file area, 13j, 23h: work area, 23b: master unit communication processing program, 23c: audio image decompression processing program, 23e: audio image data reception processing program , 23f ... compression level data area which can be processed by this terminal, 14, 24 ... storage medium reading unit, 15, 25 ... external storage medium, 16 ... portable terminal communication unit, 17 ... communication unit, 18, 27 ... display unit, 19, 28 ... Voice output unit, 20: portable terminal device (second data processing device), 26: personal computer communication unit, 32: ROM, 33: RAM (1) 34: DSP, 35: RAM (2), 36: power supply control unit 37, an input amplifier, 38, 41, a filter, 39, a CODEC, 40, a CODEC switching circuit, 42, an output amplifier, 43, a speaker, and N, a network.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C059 KK34 KK49 SS08 SS10 SS30 TA60 TA71 TC24 TC45 TD06 UA02 UA05 5C078 CA02 5K041 AA07 CC01 CC02 HH21

Claims (8)

[Claims] 1. A data processing device having a communication function, comprising: a file storage unit for storing compressed file data; a compression level determination unit for determining a compression level that can be processed by a communication partner; Compression level changing means for changing the compression level of the stored file data to a compression level which can be processed by the communication partner determined by the compression level determining means; and a compression level which can be processed by the communication partner by the compression level changing means. And a file transmitting means for transmitting the changed file data to the communication partner. 2. The compression level determining means includes: a sample file storage means for storing a plurality of sample files compressed at a plurality of compression levels; and a plurality of sample files stored in the sample file storage means. Sample file transmitting means for sequentially transmitting to the communication partner in an order according to the compression level; and processing for receiving from the communication partner respective decompression processing results for each sample file transmitted to the communication partner by the sample file transmitting means. Result receiving means, and a compression level detecting means for detecting a compression level that can be processed by a communication partner based on the respective decompression processing results for the sample files received by the processing result receiving means. The data processing device according to claim 1, wherein 3. A data processing apparatus having a communication function, comprising: a data decompression means for decompressing compressed file data; and a plurality of sample files respectively compressed at a plurality of compression levels from a communication partner at a compression level. Sample file receiving means for receiving the sample files received from the communication partner by the sample file receiving means, sample file receiving means for expanding the sample files received from the communication partner by the sample file receiving means, and sample file receiving means for receiving the sample files by the sample file expanding means. Processing result transmitting means for transmitting the result of the decompression processing to the communication partner; file receiving means for receiving file data transmitted from the communication partner in accordance with the result of the decompression processing and compressed to a compression level expandable by the data decompression means; Decompressed by the data decompression means And a file output means for outputting the obtained file data. 4. A data processing system comprising a first data processing device and a second data processing device having a communication function, wherein the first data processing device is a file storage for storing compressed file data. Means, a compression level judging means for judging a compression level at which expansion can be performed by the data decompression means of the second data processing device, and a compression level judging means for judging a compression level of file data stored in the file storage means. Compression level changing means for changing to a compression level at which expansion can be performed by the data expansion means of the second data processing device determined by the above; and expansion processing by the data expansion means of the second data processing device by the compression level changing means File transmitting means for transmitting file data changed to a possible compression level to the second data processing device The second data processing device comprises: file receiving means for receiving the file data transmitted by the file transmitting means of the first data processing device; and decompressing the file data received by the file receiving means. A data processing system comprising: data decompression means; and file output means for outputting file data decompressed by the data decompression means. 5. A storage medium storing a data processing program for controlling a computer of a data processing apparatus having a communication function, wherein the computer is a file storage means for storing compressed file data in a memory; Compression level determining means for determining a compression level that can be processed by the communication partner; changing a compression level of file data stored in the memory by the file storage means to a compression level that can be processed by the communication partner determined by the compression level determining means; A computer-readable data processing program for functioning as a compression level changing means for transmitting to a communication partner the file data changed to a compression level that can be processed by the communication partner by the compression level changing means. A storage medium that stores the information. 6. A storage medium storing a data processing program for controlling a computer of a data processing apparatus having a communication function, comprising: a data decompression means for decompressing compressed file data; Sample file receiving means for receiving a plurality of sample files compressed at each level in an order corresponding to the compression level; sample file expanding means for expanding each sample file received from a communication partner by the sample file receiving means; Processing result transmitting means for transmitting the result of the decompression processing for each of the sample files by the sample file decompression means to the communication partner; File data Incoming file receiving means, said data file output means for outputting the file data expanded by expansion means, the stored storage medium computer-readable data processing program for functioning as a. 7. A file input means for inputting file data, a first compression / expansion means having a low processing speed for compressing / expanding file data and low power consumption, and a processing speed for compressing / expanding file data. A second compression / expansion unit that consumes a large amount of power quickly, and a switching unit that switches between the first compression / expansion unit and the second compression / expansion unit according to the contents of the file data input by the file input unit. A data processing apparatus comprising: a file output unit that outputs file data expanded by the first compression / expansion unit or the second compression / expansion unit. 8. The first compression / decompression means is means for processing compression / decompression by software, and the second compression / decompression means is means for processing compression / decompression by hardware. The data processing device according to claim 7, wherein: