JPH06295532A - Data processor - Google Patents

Abstract

PURPOSE:To record or reproduce data even to recording media in different formats at low cost by loading and processing programs corresponding to the kinds of data recorded in the recording media. CONSTITUTION:When a cartirdge is inserted, a microcomputer 74 reads user TOC data, investigates the format from the identified data, reads out the program corresponding to the identified data of a memory 75 and loads it to a memory 66 of a DSP 65. Thus, the DSP 65 enables extension processing to the format mounted to a drive device 76. In the case of normal MD reproducing, for example, data are reproduced from an MD and stored in the memory 66. The DSP 65 similarly extends the data stored in the memory 66 according to the program stored in the memory 66, performs D/A conversion to those data and outputs them to a speaker 45. In the case of a recording mode, on the other hand, the DSP 65 compresses the input data in the prescribed format according to the stored program in the memory 66 and supplies them to the drive device 76.

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 suitable for use in, for example, compressing / decompressing video data or audio data on a magneto-optical disk for recording / reproduction.

[0002]

2. Description of the Related Art Recently, a magneto-optical disk (mini disk)
Mini disc (MD) devices for compressing and recording and reproducing digital audio data in (trademark) are becoming popular. FIG. 6 shows an example of the configuration of this mini disk device.

A mini disk (magneto-optical disk) 3 is housed in a cartridge 2 and is rotated by a spindle motor 1. When this mini disk 3 is mounted on the main body of the apparatus, the optical pickup 4 having the objective lens 5 and the magnetic head 6 are
Are arranged so as to face each other. The magnetic head 6 and the optical pickup 4 are connected by a connecting member (not shown), and are moved by a feed motor 7 in the radial direction of the mini disk 3.

When the key 20 is operated to instruct a recording operation, for example, the system controller 18 drives the spindle motor 1 via the servo control circuit 8 to rotate the mini disk 3 at a predetermined speed. Further, the servo control circuit 8 controls the optical pickup 4 to emit a laser beam from a built-in laser diode and irradiate the mini disk 3 through the objective lens 5. The laser beam reflected by the mini disk 3 enters the optical pickup 4 through the objective lens 5 and is received by the built-in photodetector.

A pre-groove is formed on the mini disk 3, and an address is recorded by making the pre-groove meander at a predetermined frequency. The RF signal output from the photodetector of the optical pickup 4 is input to the address decoder 17 via the RF amplifier 16, and the address decoder 17 decodes the address from the signal corresponding to this pregroove. The decoded address is supplied to the encoder / decoder 13. Encoder /
The decoder 13 reads the sector and other addresses from the input address and encodes them so that they will have a predetermined format, as described later.

Further, the servo control circuit 8 includes an RF amplifier 1
A focus error signal, a tracking error signal, a sled error signal, and the like are generated from the signal output by 6, and the optical pickup 4 is controlled correspondingly to execute the focus servo, tracking servo, and sled servo.

The analog audio signal is input to the A / D converter 9 and converted into digital audio data of 16 bits per sample at a sampling frequency of 44.1 kHz, for example. The digital audio data output from the A / D converter 9 is an audio compression encoder /
It is input to the decoder 10 and a predetermined method (ATRAC (A
daptive Transform Acoustic
c Coding method)
To be done.

In the encoder / decoder 10, the input digital audio data is 11 kHz to 2 kHz.
High frequency component of 2 kHz and 5.5 kHz to 11 kHz
And a low frequency component of 0 kHz to 5.5 kHz, each frequency component being MDCT
(Modified Discrete Cosine Transform) and compressed. By thus dividing the frequency band into three, it is possible to suppress the pre-echo that is likely to occur in the DCT calculation.

The data encoded by the encoder / decoder 10 is stored in the memory controller 11
Via, for example, a DRAM 1 having a capacity of 4 Mbits
2 and is stored once. This DRAM 12 is
It is possible to store an audio signal for about 3 seconds in real time. Therefore, even when the recording operation by the optical pickup 4 and the magnetic head 6 which will be described later is temporarily interrupted due to a disturbance shock or the like, the audio signal input in real time is continuously stored. Therefore, it is possible to prevent the recording signal from being interrupted in the middle.

The data stored in the DRAM 12 is read by the memory controller 11 at a predetermined timing and input to the EFM / CIRC encoder / decoder 13. The encoder / decoder 13 outputs the input digital audio data to a compact disc (CD).
In the same way as in the case of
A code for error detection and correction is added. The data encoded in this way by the encoder / decoder 13 is supplied to the head drive circuit 14, and the head drive circuit 1
Reference numeral 4 supplies a drive signal corresponding to the input recording data to the magnetic head 6. The magnetic head 6 applies a vertical magnetic field to the mini disk 3 in response to this drive signal. As a result, data is recorded on the mini disc 3.

FIG. 7 shows a recording format in the mini disc 3. As shown in the figure, the mini disk 3 has one circumference divided into a plurality of sectors. Then, the encoder / decoder 13 records 36 sectors as one cluster and records the compressed digital audio data in units of this cluster.

As shown in the figure, of the 36 sectors forming one cluster, the first 3 sectors are link sectors, and the next 1 sector is a sub data sector. Sub data other than audio data is arranged in this sub data sector. The link sector is an area for combining front and rear clusters, and the audio data is substantially 3 bytes other than the link sector and the sub data sector.
Only recorded in 2 sectors.

One sector has 2352 bytes (2 for data).
352 bytes), and 11 sound groups are arranged in two consecutive sectors. One sound group has 424 bytes, and the audio data of the left channel and the right channel is arranged in a total of 512 samples (11.61 ms).
Digital audio data is recorded in units of this sound group.

When reproduction is instructed by operating the key 20,
The system controller 18 controls the optical pickup 4 via the servo control circuit 8 to adjust the intensity of the laser beam to the intensity for reproduction (intensity weaker than the intensity for recording). The optical pickup 4 outputs a signal corresponding to the laser beam reflected from the mini disk 3 to the RF amplifier 16
To the encoder / decoder 13 via. The encoder / decoder 13 refers to the address position supplied from the address decoder 17 and decodes the data.
That is, EFM demodulation and error detection and correction are performed.
The data is stored in the DRAM 12 via the memory controller 11.

As described above, since the DRAM 12 can store about 3 seconds of data in real time, the operation of reading data from the mini disk 3 by the optical pickup 4 is temporarily interrupted due to disturbance or the like. Even in such a case, if the reading operation from the mini disk 3 can be restarted within 3 seconds, the reproduction signal can be prevented from being interrupted in the middle.

The memory controller 11 allows the DRAM 1
The data read from 2 is the encoder / decoder 1
The compressed digital audio data supplied to 0 is expanded, supplied to the D / A converter 15, D / A converted, and output as an analog audio signal.

On the display unit 19, a message or the like necessary for the recording / reproducing operation is displayed at any time.

On the other hand, it has been proposed, for example, as a CD-I format to record video data and audio data accompanying it on a magneto-optical disk or an optical disk according to the MPEG format. This MP
In the EG method, video data and audio data are compressed and recorded on a recording medium. FIG. 8 shows the principle of video data compression. As shown in the figure, for example, a GOP (group of pictures) is formed in a predetermined number of frames (7 frames in this example). The first frame of each GOP is an I picture, the following two frames are B pictures, the next one frame is a P picture, and the following two frames are B pictures, and the first and last frames are It is a P picture.

In the I picture, the image is compressed by utilizing the intra-frame correlation. A P picture is a temporally preceding I
Data is compressed using inter-frame correlation using a picture or P picture as a predicted image. In addition, the B picture is compressed in data by utilizing inter-frame correlation, with an I picture or P picture preceding in time and an I picture or P picture following in time as predicted images.

That is, when a video signal is input in the order of frames 0 to 6 (FIG. 9A), each frame is
The frames are coded in the order of 0, 3, 1, 2, 6, 4, 5 (FIG. 9 (b)). This is because a B picture involves prediction not only from a temporally preceding frame but also from a temporally subsequent frame, so that a P picture as a temporally subsequent predicted image is not decoded in advance. This is because the B picture data cannot be encoded. As a result, the transmitted video data (recorded on the recording medium) is in the order of frames 0, 3, 1, 2, 6, 4, 5. Therefore, when this is reproduced from the recording medium and decoded, the order becomes frames 0, 3, 1, 2, 6, 4, 5 (FIG. 9 (c)).

This is the frame 0, 1, 2, 3, 4,
Return to the original order of 5 and 6 (FIG. 9D), and further convert this data from a non-interlaced video signal to an interlaced video signal, for example N
It can be displayed on a TSC television receiver (FIG. 9E).

In this MPEG system, an audio signal accompanying a video signal can be encoded in layer I or layer II as shown in Table 1.

[0023]

[Table 1]

Also, as shown in this table, a predetermined coding rate can be selected from 14 types in each layer at any time. The sampling frequency of the audio signal is 44.1 kHz, which is similar to the case of the above-mentioned mini disk, but the encoding speed can be selected at any time in this way.

The MPEG system video data and audio data are superimposed and converted into a predetermined format as an MPEG bit stream. Then, the data of the MPEG bit stream is converted into a recording format corresponding to a recording medium such as a CD and recorded on a CD (CD-I), and the data reproduced from the CD is the format of the MPEG bit stream. It is designed to be converted into and output. As described above, the data can be mutually used by being configured so that various data processing devices can process the format of the MPEG bit stream.

The format for recording MPEG format data on a CD is defined as the CD-I format. In the CD-I format, data is recorded in sector units. Each sector is composed of a header, a subheader, and a data field. The header and the subheader store a data format, a form type, and coding information. The data format is classified into a video sector, an audio sector or a data sector according to the format of the data recorded in the sector. That is, when the data recorded in the data field is video data, it is a video sector, when it is audio data, it is an audio sector, and when it is data such as an application program, it is a data sector. To be done.

The form (form 1 or 2) indicates whether or not there is an error correction code of data in the data field, and the sector of form 1 includes 2048 bytes of user data and 280 bytes of error correction code. Further, the sector of form 2 does not include an error correction code, and as a result, it becomes possible to record user data of 2324 bytes.

The encoding information indicates the encoding format of the sector. For example, the encoding format of the video sector includes image signal formats such as ΔYUV, CLUT, RGB, etc., which are used as this encoding information. Can be correspondingly identified. In the case of the audio sector, there are level A, level B, and level C ADPCM formats, and each level has a different compression rate.

In order to record the data of a natural moving image (full image) similar to a normal television image, two formats are further specified in the video sector. One of them is MP of non-interlaced video.
MPEG video showing EG encoded data
One is MP which shows the encoded data of the interlaced still image.
This is the EG still image format. Furthermore, the MPEG audio format is specified for the audio sector. These MPEG videos, MPEG
Both the still image and the MPEG audio are in the sector of form 2.

An MPEG stream is recorded in each sector so as to have compatibility between different data processing devices.

The above-mentioned mini disk (MD) was originally developed for recording and reproducing audio data, but the MDX format is defined so that data other than audio data can also be recorded and reproduced. ing. A drive device (MDXD) compatible with the MDX format is a system originally developed for use in personal audio equipment (portable type, stationary type, or vehicle type), and has a read-only optical disc with a diameter of 64 mm and a rewritable MO. Using a recording medium containing either a (magneto-optical) disc or a hybrid (partial ROM) disc having a rewritable area and a read-only area in a cartridge, a magnetic field modulation overwrite recording is performed on an MO disk or a hybrid disk. Data is recorded according to the method.

Through the development process as a personal audio device, each circuit element is integrated and each mechanical component is optimized, and the overall size and weight of the device are reduced, and the low power consumption reduces battery operation. Is possible. Furthermore, it has almost the same storage capacity (120 MB) as the existing 3.5-inch MO disk drive.
In addition to the features that the recording medium can be exchanged, and because of the effect of mass production, it is possible to reduce the manufacturing cost of the device main body and the recording medium as compared with other MO disk drives, and it is possible to use as a personal audio device. The reliability of the product has been proven sufficiently from the actual usage record of.

[0033]

As described above, the MDXD
Can be used as a drive for various data processing devices, but as described above, for example, the format as a mini disk (MD) and the format of CD-I for recording video data and audio data by the MPEG method. It is not compatible because it has a different format from. Therefore, there is a problem that the MDX (CD-I) disc cannot be reproduced in the minidisc device, and the MD cannot be reproduced in the MDXD. Of course, if both the circuits corresponding to the respective formats are provided, the discs of any format can be played back, but doing so increases the cost.

The present invention has been made in view of the above circumstances, and is intended to enable data to be recorded or reproduced on recording media of different formats at low cost.

[0035]

The data processing apparatus of the present invention is a data processing apparatus for compressing / expanding data on a mini disk 3 as a recording medium and recording / reproducing the data. By loading step S1 on the program as a determination means for determining the type and the program corresponding to the determination result of step S1,
It is characterized by including steps S2 to S5 on the program as processing means for compressing and expanding data.

As data, digital audio data or digital video data can be processed.

[0037]

In the data processing apparatus having the above structure, the program is loaded according to the type of data and the data is compressed and expanded. Therefore, it is not necessary to provide a processing circuit corresponding to each different format, and the cost can be reduced.

[0038]

1 is a perspective view showing the configuration of an embodiment of a magneto-optical disk recording / reproducing apparatus (MDXD) to which a data processing apparatus of the present invention is applied. The magneto-optical disk recording / reproducing device 31 is provided with an insertion hole 32 on its side surface, and the cartridge 2 described with reference to FIG. 6 can be mounted through the insertion hole 32. As described with reference to FIG. 6, the mini disk 3 is accommodated in the cartridge 2.

Further, the magneto-optical disk recording / reproducing apparatus 3
1, a key 33 is provided on the right side of the insertion hole 32 so that a predetermined command such as power on / off, reject, reset, etc. can be input. further,
An infrared light receiving portion 34 is provided on the left side of the insertion hole 32,
The infrared ray command emitted from the remote controller 35 is received.

The magneto-optical disc recording / reproducing apparatus 31 is
It is adapted to be connected to a telephone line via a cord 41. An audio signal is input from the microphone 43 via the cord 42, and an audio signal can be output to the speaker 45 via the cord 44. Furthermore, code 46
A video signal can be supplied from a video tape recorder (VTR) 47 with a built-in camera, for example. Further, a video signal can be output to the television receiver 49 via the code 48. Also, via code 50,
The printer / reader 51 can be connected to the printer / reader 51 so that a predetermined signal can be output to the printer / reader 51 for printing and the read data can be input.

FIG. 2 shows a magneto-optical disk recording / reproducing apparatus 31.
FIG. 3 is a block diagram showing the internal electrical configuration of FIG. The interface (I / F) 61 supplies the data transmitted from the telephone line via the code 41 to the filter 62,
After removing unnecessary components, it is output to the switch 63. In addition, the switch 63 causes the filter 62 to
The data input via the code is output to the telephone line via the code 41.

The filter 62 has a frequency band (for example, a frequency band in which a signal output from a telephone line can be transmitted through the telephone line)
(300 Hz to 4 kHz). The switch 63 selects either the signal supplied from the microphone 43 or the signal supplied via the telephone line, and A
It outputs to the / D, D / A converter 64. Also, A / D, D
The signal supplied from the A / A converter 64 can be switched to be output to the speaker 45, the telephone line, or both.

The A / D and D / A converter 64 includes a switch 6
A / D-converts the analog audio signal supplied from 3 and supplies it to a DSP (digital signal processor) 65, and also D / A converts the digital analog audio signal supplied from the DSP 65 to switch 63.
Output to. The DSP 65 includes a memory (RAM) 66 and executes a predetermined process according to a program stored therein. The memory 66 also stores data required for processing as needed.

The video signal supplied from the VTR 47 is
After being A / D converted by the A / D converter 67, it is supplied to the video processor 68. The video processor 68 performs graphic editing processing and the like on the input video data as necessary, and outputs the VRAM.
It is output to 70 and stored. The video data stored in the VRAM 70 is D / A converted by the D / A converter 71 and then supplied to the television receiver 49 for display. The MPEG decoder 69 is supplied from the magneto-optical disk drive device 76 (basically, configured to record and reproduce data on the mini disk 3 as shown in FIG. 6). It is designed to decode the system video data. The video processor 68 also outputs the video data decoded by the MPEG decoder 69 to the television receiver 49 via the VRAM 70 and the D / A converter 71 for display.

The infrared signal received by the light receiving section 34 from the remote controller 35 is transmitted by the interface (I
/ F) 72 to the microcomputer 74. Interface (I / F)
The numeral 73 outputs a signal corresponding to the instruction from the key 33 to the microcomputer 74. The microcomputer 74 is a RISC CPU 74a,
It includes a DMA controller (DMAC) 74b, an interrupt controller (INTC) 74c, and the like. Further, the microcomputer 74 has a memory 75.
Are connected via a bus, and this memory 75
A program necessary for the processing operation of the DSP 65, data for interpreting a signal input from the remote controller 35, and the like are stored. The microcomputer 74 is also connected to the printer / reader 51.

The interface (I / F) 77 is equipped with a card RAM or a card ROM according to the standard such as PCMCIA, and the data thereof is taken in as required.

Next, referring to the flowchart of FIG.
The operation will be described. Now, the drive device 76
When the cartridge 2 in which the mini disk 3 is housed is mounted, the microcomputer 74 first executes the process for checking the format of the disk in which the drive device 76 is mounted in step S1.

That is, as shown in FIG. 4, the mini disc 3 is provided with a lead-in area in a predetermined area on its inner circumference and a lead-out area on the outermost circumference side. And between this lead-in area and lead-out area,
The user can record predetermined data, and the user TOC area is provided on the innermost side of this area, and the TOC data required by the user can be recorded at any time. It is done like this. In the case of a normal MD disc, the address of the recorded music number is recorded in this user TOC area, but in the present embodiment, identification data corresponding to the format is further recorded in this user TOC area. It is designed to be.

When the cartridge 2 is inserted into the drive device 76, the microcomputer 74 reads this user TOC data and checks the format from its identification data. This identification data is written in an intermediate language program so that it can be interpreted even when the microcomputer 74 (RISC CPU 74a) is replaced with a different type (when a mini disk is attached to a different model). There is.

After checking the format from the identification data in this way, the microcomputer 74 proceeds to steps S2 to S4 to read the program corresponding to the identification data from the memory 75 and load it into the memory 66 of the DSP 65. This enables the DSP 65 to perform decompression processing corresponding to the format mounted on the drive device 76. Therefore, next, in step S5, the DSP 6
5 corresponds to the program loaded in the memory 66,
Executes DSP processing.

That is, when the mounted mini disc MD (audio signal is recorded) is a disc (MD format disc), the memory 66 stores
A program for performing the same function as the device shown in FIG. 6 is loaded. Also, when MDX is installed,
A program for executing the above-mentioned MDX format processing is loaded.

For example, when a normal mini disk MD is loaded and a playback command is issued, the drive device 76 plays back data from the loaded mini disk 3 and supplies it to the memory 66 for storage. The DSP 65 converts the digital audio data stored in the memory 66 into the memory 66 in the same manner.
Decompress (decode) according to the program stored in. The data decoded by the DSP 65 is
After being input to the A / D, D / A converter 64, D / A converted, and output to the speaker 45 via the switch 63,
The sound is emitted. Alternatively, if necessary, switch 63
Is output to the telephone line via the filter 62 and the interface 61.

The mini disk 3 mounted in the drive device 76 is an MDX format disk in which video data and audio data are compressed and recorded, for example, in the MPEG format according to the above-mentioned CD-I format. In this case, when the reproduction is instructed, the audio data is processed by the DSP 65 as in the case described above.
Are processed (the processing content is different from that in MD) and output.

On the other hand, the video data is supplied to the MPEG decoder 69 and decoded. MPEG decoder 6
The data decoded by 9 is supplied to the VRAM 70, temporarily stored therein, and then read out again, so that the D / A
The signal is D / A converted by the converter 71, output to the television receiver 49, and displayed. This image data can be subjected to graphic editing processing by the video processor 68 as needed.

On the other hand, when the recording mode is instructed, one of the audio signal input from the microphone 43 and the signal input via the telephone line, the interface 61 and the filter 62 is selected by the switch 63, and the A / D is selected. , D / A converter 64 performs A / D conversion, and supplies to the DSP 65. The DSP 65 compresses the input digital audio data in a predetermined format (MD or MPEG) according to a program stored in the memory 66, and supplies it to the drive device 76. As a result, the audio data is compressed and recorded on the mini disk 3 mounted on the drive device 76.

In the present embodiment, since the MPEG encoder is not provided, the video data cannot be recorded. However, if the MPEG encoder / decoder is provided instead of the MPEG decoder 69, the video data can be recorded on the mini disk 3. Can be recorded.

The DSP 65 also executes a function as a MODEM when transmitting and receiving data via a telephone line.
At this time, the DSP 65 compresses the audio signal input via the telephone line, and records it on the mini disk 3 mounted in the drive device 76. This makes it possible to perform the answering machine function. Also,
The video data or audio data reproduced by the drive device 76 is transmitted via the telephone line. Furthermore D
The SP 65 converts the image data captured by the printer / reader 51 into, for example, MMR (Modified M).
compressed according to the modified read method and transmitted via a telephone line. As a result, a fax (G3, G
2) Can perform a function. Of course, it is also possible to record the image data once on the mini disk 3 and reproduce it for transmission.

As described above, in this embodiment,
As a program for operating the DSP 65, a compression / expansion method (ATRAC) program for a mini disk,
Alternatively, since the MPEG system program is loaded, it is not necessary to provide a dedicated DSP (processing circuit) for each, and the cost can be reduced accordingly.

In this embodiment, the program to be loaded into the DSP 65 is stored in the memory 75 in advance, but it is loaded from the mini disk 3 mounted in the drive device 76 or the interface 77.
It is also possible to load from the card attached to.

FIG. 5 shows another embodiment of the magneto-optical disk recording / reproducing apparatus of the present invention. The magneto-optical disk recording / reproducing device 81 includes a DSP 65 and a memory (RAM) 66 corresponding to the DSP 65, and a drive device 76 as in the embodiment of FIG. And in this embodiment, a video processor 93,
A memory (RAM) 94 corresponding thereto is provided.

A D / A, A / D converter / controller 91 is connected to the DSP 65, and an analog audio signal input via the microphone 43 or a telephone line is A / D converted and output to the DSP 65. , D
Digital audio data output from SP65 is D
A / A is converted and output to the speaker 45 or the telephone line. Similarly, the D / A, A / D converter / controller 92 A / D converts the analog video signal supplied from the VTR 47 and outputs the analog signal to the video processor 93, and the digital signal output from the video processor 93. The video data is D / A converted and output to the television receiver 49 or a telephone line.

Further, an interface 95 is provided,
A signal input from the remote controller 35 or the keyboard is output to the control port 96.

Further, in this apparatus, a ROM 99 in which a predetermined program and the like are stored in advance, a CPU 97 which executes a predetermined operation in accordance with this program, and further, predetermined data, programs and the like are stored as necessary.
An AM 98 is provided, and these are connected to the drive device 76, the DSP 65, the video processor 93 and the control port 96 via the bus.

Next, the operation will be described. In this embodiment, the drive device 76 includes a cartridge 2
When the mini disk 3 housed in
The U97 immediately reads the user TOC of the mounted mini disc 3 and specifies the format from the identification data. Then, the CPU 97 reads the program corresponding to the identified format from the ROM 99, and D
RAM66 corresponding to SP65 and video processor 9
The RAM 94 corresponding to No. 3 is loaded. As a result, the DSP 65 and the video processor 93 are brought into a state in which compression / expansion processing corresponding to the format of the mini disk 3 mounted on the drive device 76 can be executed.

In this state, when a recording operation command is input from the remote controller 35 or the keyboard, this command is input to the CPU 97 via the interface 95 and the control port 96. CP
The U97 starts the recording operation in response to this command.

When the mounted MDX format mini-disc is, for example, the analog video signal supplied from the VTR 47 is A / D converted by the D / A, A / D converter / controller 92, and then the video processor. It is input to 93. The video processor 93 temporarily stores the input video data in the RAM 98 (or RAM 94). Then, according to the program stored in the RAM 94, the video data stored in the RAM 98 is compressed according to, for example, the MPEG system.

On the other hand, for example, the analog audio signal input from the microphone 43 is A / D converted by the D / A, A / D converter / controller 91 and supplied to the DSP 65. The DSP 65 temporarily stores the input digital audio data in the RAM 98 (or RAM 66). Then, according to the program stored in the RAM 66, the digital audio data stored in the RAM 98 is compressed according to, for example, the MPEG system.

In this way, the compressed video data and audio data are made into an MPEG bit stream, supplied to the drive device 76, and recorded on the mounted mini disc 3.

When the mini disk 3 mounted on the drive device 76 is a normal MD format disk,
A program for compressing and expanding the MD format is loaded in the RAM 66. As a result, the input analog audio signal is converted into the MD format, and the mini disk 3 mounted in the drive device 76.
Recorded in.

However, in the case of the mini disk format,
Since no video data is recorded, no particular program is loaded into the RAM 94.

On the other hand, when the reproduction is instructed, the data reproduced by the drive device 76 is supplied to the RAM 98 and temporarily stored. The DSP 65 reads out audio data from the data stored in the RAM 98, decompresses (decodes) the audio data, outputs the decompressed audio data to the D / A / A / D converter / controller 91, and D / A conversion. , Through the speaker 45.

On the other hand, the video processor 93 has a RAM 9
Of the data stored in 8, the video data is read, decompressed (decoded), output to the D / A, A / D converter / controller 92, D / A converted, and then the television receiver. It is output to 49 and displayed.

The video processor 93 operates on the mini disk 3 mounted on the drive device 76,
It goes without saying that it is only when video data is recorded.

Thus, in this embodiment, the DSP 6
In addition to 5, the video processor 93 loads a program corresponding to the format of the mini disk 3 mounted on the drive device 76, and according to this program,
Since the data compression / expansion process is performed, it is not necessary to prepare a plurality of dedicated formats for the DSP and the video processor, and the cost can be reduced.

Further, in this embodiment, the programs corresponding to the respective formats are stored in the ROM 99 in advance. However, as in the case of the embodiment of FIG.
If necessary, it is possible to load from the mini disk 3 mounted on the drive device 76 or the card mounted on the interface 76.

Also in the embodiment of FIG. 5, DS
P65 can perform the function as a MODEM. In this case, both the video data and the audio data input via the telephone line have a predetermined frequency band (30
It is converted into a signal of 0 Hz to 4 kHz) and transmitted via a telephone line.

In the above embodiment, the identification data for identifying the type of format is recorded in the user TOC area of the mini disk 3, but as data in the data area (see, for example, FIG. 7). It is also possible to record it).

The case where the present invention is applied to a magneto-optical disk recording / reproducing apparatus has been described above as an example. However, in addition to the above, the present invention can be applied to a magnetic disk, a magnetic tape, and other recording media to record audio data, video data, It can be applied to the case where other digital data is compressed and recorded, and this is expanded and reproduced.

[0079]

As described above, according to the data processing apparatus of the present invention, the program corresponding to the type of data recorded on the recording medium is loaded and processed. Therefore, the circuit configuration is simplified and the apparatus is simplified. It is possible to reduce the cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of an embodiment of a magneto-optical disk recording / reproducing apparatus to which a data processing apparatus of the present invention is applied.

FIG. 2 is a magneto-optical disk recording / reproducing device 31 shown in FIG.
3 is a block diagram showing the internal configuration of FIG.

FIG. 3 is a flowchart illustrating the operation of the embodiment of FIG.

FIG. 4 is a diagram illustrating a format of a mini disc mounted on the drive device 76 of FIG.

FIG. 5 is a block diagram showing the configuration of another embodiment of a magneto-optical disk recording / reproducing apparatus to which the data processing apparatus of the present invention is applied.

FIG. 6 is a block diagram showing a configuration example of a mini disk device.

FIG. 7 is a diagram illustrating a format of the mini disc of FIG.

FIG. 8 is a diagram illustrating the principle of image compression in the MPEG system.

FIG. 9 is a timing chart for explaining the order of image compression in the MPEG system.

FIG. 10 is a diagram illustrating an MPEG stream in the MPEG system.

[Explanation of symbols]

 2 cartridge 3 mini disk 4 optical pickup 6 magnetic head 31 magneto-optical disk recording / reproducing device 32 insertion hole 34 light receiving section 35 remote controller 43 microphone 45 speaker 47 video tape recorder 49 television receiver 51 printer / reader 65 DSP 66 memory 68 video Processor 69 MPEG Decoder 74 Microcomputer 75 Memory 93 Video Processor 94 Memory 97 CPU 98 RAM 99 ROM

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[Procedure amendment]

[Submission date] June 21, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

The above-mentioned mini disk (MD) was originally developed for recording and reproducing audio data, but the format of MD data is specified so that data other than audio data can be recorded and reproduced. Has been done. Corresponding to the format of this MD data
The MD data drive device (MDD) is a system originally developed for use as a personal audio device (portable type, stationary type, or in-vehicle type), and has a read-only optical disc having a diameter of 64 mm and a rewritable MO (magneto-optical) disc. , Or a hybrid (partial ROM) disc having a rewritable area and a read-only area in a cartridge.
Data is recorded on a disc or a hybrid disc by a magnetic field modulation overwrite recording method.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

[0033]

As described above, the MD data
The drive device can be used as a drive for various data processing devices, but as described above, for example, as a mini disk (MD) format and MPE.
Since the format is different from the CD-I format for recording video data and audio data by the G method, they are not compatible. For this reason,
In a mini disk device, a format compatible with MD data
It is not possible to play the door of the disk, also, M for music
There is a problem that D cannot be reproduced by the data drive device . Of course, if both the circuits corresponding to the respective formats are provided, the discs of any format can be played back, but doing so increases the cost.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a magneto-optical disk recording / reproducing apparatus ( MD data drive device) to which the data processing device of the present invention is applied.
Is a perspective view showing the structure of an embodiment of a location). The magneto-optical disk recording / reproducing device 31 is provided with an insertion hole 32 on its side surface, and the cartridge 2 described with reference to FIG. 6 can be mounted through the insertion hole 32. As described with reference to FIG. 6, the mini disk 3 is accommodated in the cartridge 2.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction content]

The video signal supplied from the VTR 47 is
After being A / D converted by the A / D converter 67, it is supplied to the video processor 68. The video processor 68 performs graphic editing processing and the like on the input video data as necessary, and outputs the VRAM.
It is output to 70 and stored. The video data stored in the VRAM 70 is D / A converted by the D / A converter 71 and then supplied to the television receiver 49 for display. The MPEG decoder 69 is an MD data drive
To decode the MPEG video data supplied from the device 76 (basically, as shown in FIG. 6, the data can be recorded / reproduced on / from the mini disk 3). Has been done. The video processor 68 also outputs the video data decoded by the MPEG decoder 69 to the television receiver 49 via the VRAM 70 and the D / A converter 71 for display.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

Next, referring to the flowchart of FIG.
The operation will be described. MD data drive now
When the cartridge 2 in which the mini disk 3 is housed is mounted in the device 76 , the microcomputer 74
First, in step S1, a process for checking the format of the disc in which the drive device 76 is mounted is executed.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction content]

That is, as shown in FIG. 4, the mini disc 3 is provided with a lead-in area in a predetermined area on its inner circumference and a lead-out area on the outermost circumference side. And between this lead-in area and lead-out area,
The user can record predetermined data, and the user TOC area is provided on the innermost side of this area, and the TOC data required by the user can be recorded at any time. It is done like this. In the case of a normal music MD , the address of the recorded music number is recorded in this user TOC area, but in this embodiment, identification data corresponding to the format is further recorded in this user TOC area. It is designed to be done.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0049

[Correction method] Change

[Correction content]

The microcomputer 74 uses the MD data
When the cartridge 2 is inserted into the drive device 76 ,
This user TOC data is read and the format is checked from the identification data. This identification data is described in an intermediate language program so that it can be interpreted even when the microcomputer 74 (RISCCPU 74a) is replaced with a different type (when a mini disk is attached to a different model). .

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

That is, the one mounted is a normal music MD
If (audio signal is recorded) (is MD format disc), the memory 66 is loaded with a program for executing the same function as that of the apparatus shown in FIG. In addition, the MD data compatible format
When the disk is installed, the MD data former described above
Program for executing the processing of Tsu door is loaded.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction content]

For example, when a normal music MD is loaded and playback is instructed, the drive device 76 plays back data from the loaded minidisk 3 and supplies it to the memory 66 for storage. The DSP 65 expands (decodes) the digital audio data stored in the memory 66 according to a program similarly stored in the memory 66. The data decoded by the DSP 65 is A /
After being input to the D / D / A converter 64 and D / A converted, the sound is output to the speaker 45 via the switch 63 and emitted. Alternatively, it is output from the switch 63 to the telephone line via the filter 62 and the interface 61 as required.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction content]

The mini disc 3 mounted in the MD data drive device 76 is an M format in which video data and audio data are compressed and recorded in an MPEG format by the above-mentioned CD-I format, for example.
In the case of a disc of the D data compatible format , when reproduction is instructed, the audio data is processed by the DSP 65 as in the case described above (the processing content is MD
Is output).

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0066

[Correction method] Change

[Correction content]

The MD data compatible former is attached.
In the case of a mini disc, for example, an analog video signal supplied from the VTR 47 is A / D converted by the D / A, A / D converter / controller 92 and input to the video processor 93. The video processor 93
The input video data is transferred to RAM98 (or RAM9
4) Store it once. Then, according to the program stored in the RAM 94, the video data stored in the RAM 98 is compressed according to, for example, the MPEG system.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0069

[Correction method] Change

[Correction content]

When the mini disk 3 mounted in the drive device 76 is a normal audio MD format disk, the RAM 66 is loaded with a program for compressing and expanding the MD format. As a result, the input analog audio signal is converted into the MD format and recorded on the mini disk 3 mounted on the drive device 76.

[Procedure Amendment 13]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 14]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (3)

[Claims] 1. A data processing device for recording or reproducing data by compressing or expanding data on a recording medium, comprising: a determining means for determining the type of data recorded on the recording medium; and a determination result of the determining means. A data processing apparatus comprising: a processing unit that loads a corresponding program and compresses or expands the data. 2. The data processing apparatus according to claim 1, wherein the data is digital audio data. 3. The data processing device according to claim 1, wherein the data is digital video data.