JPH0728850A - Digital picture data output device - Google Patents

Abstract

PURPOSE:To easily recognize pictures and to improve a using feeling by connecting picture data for retrieval on a front side inside a data file to the picture data, forming them as one unit of the data file and changing the display state to a moved display range. CONSTITUTION:Broken lines indicate the dot size of a display part and only a slight area can be displayed by one screen in a normal picture 60, however, more than a half of the area can be displayed by one screen in a thinned picture 50. When the display of the thinned picture 50 is viewed and the pictures are desired to be displayed in detail, the normal picture 60 is displayed. Since the thinned picture 50 and the normal picture 60 are in the same data file, the time is not required for changeover. Then, when the dot size of the picture data is larger than a displayable size, a large range approximately for one screen for instance is moved (jumping movement) and the whole is promptly confirmed. Further, by minutely adjusting a display position so as to make a target part easily visible by shift movement, usability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data file structure of image data and a disk device for recording or reproducing the data file on a disk recording medium.

[0002]

2. Description of the Related Art A recording device capable of recording / reproducing music and the like, a reproducing device, and a magneto-optical disk as a recording medium have been put into practical use. Those capable of recording voices (so-called mini discs) are also known.

When using this mini disk system,
Generally, audio signals such as music are recorded / reproduced. For example, in this mini disk system, character data other than music information, image data, etc. are recorded / reproduced.
It may be possible to make it playable.

In the present specification, a so-called audio signal such as music or voice recorded on a magneto-optical disk is digitized, and is particularly referred to as "audio data", and one unit thereof is referred to as "song". To do. And
Data other than audio data used by information devices such as so-called computers such as characters and graphics that are recorded on a magneto-optical disk are simply referred to as "data" or "general data" and are distinguished from audio data. Then, one recording / reproducing unit of data is defined as a "data file". For the sake of explanation, character data and image (dot) data are given as examples of general data.

[0005]

By the way, considering the case of recording / reproducing image data as general data, there are the following problems.

As a display unit for displaying document data consisting of character codes generally used in word processors and the like, for example, 2 640 dots in the horizontal direction and 400 to 480 dots in the vertical direction are used.
A value (black and white) display is often used. Then, if one character code is converted into font data of 16 × 16 dots by font conversion and displayed, a document of 40 characters horizontally (1 line) and 25 to 30 lines vertically is displayed on the screen. It can be displayed.
Therefore, if such a display unit is provided in the disk device,
It can be used as an output unit for character data.

On the other hand, as the image data, the dot size adopted in the facsimile is 1728 dots in the horizontal direction and about 2100 dots in the vertical direction. Therefore, if the image data of such a dot size is recorded on the disk and is reproduced and is output for display on the display unit, only a part of the image can be displayed.

FIG. 44 shows the relationship between the facsimile size image data and the display area when the display has 640 horizontal dots and 400 vertical dots. 172
A solid line enclosing an area of 8 dots × 2100 dots indicates the size as image data, and an area enclosed by a broken line indicates an area of a size that can be displayed on the display for display. As can be seen from the figure, in order to display all the image data of 1728 dots × 2100 dots, a display size of 640 dots × 400 dots is required for three screens horizontally and five screens vertically. Therefore, in reality, the entire image is viewed while scrolling the display on the screen vertically and horizontally.

[0009] However, it is very difficult to grasp the whole image of the image, for example, by scrolling the image one by one, and it is not practical as a means for outputting a certain image. This is a major obstacle in the case where, for example, a display unit is provided in a mini disk system so that not only character data but also image data can be recorded / reproduced. In addition, there is a problem that it takes time to reproduce and output because of the large amount of information. Then, for example, when searching for an image to be displayed and output while actually viewing the image, 1
It takes a long time to read an image of one data file, which is very frustrating.

Further, in any case, when the dot size of the image data is larger than the displayable size, it is necessary to move the display part so that the whole can be seen. As a method,
A shift method in which the display portion gradually scrolls can be considered.

However, there is a problem that it takes time to display a target position in shift movement.
There is also a problem that it may become impossible to know which part of the image is currently displayed by repeating the movement.

In order to see the entire image quickly, for example, a block as a display range may be set at the dot position of the image data so that the image is switched for each block (block movement). . For example, in FIG.
The display range is divided into 15 blocks of 5 blocks in the vertical direction and 3 blocks in the horizontal direction corresponding to the dot range indicated by the broken line as the display range. Then, the display may be switched to the adjacent block in the vertical and horizontal directions. However, since the display is fixed in block units, it is not always possible to obtain an easily viewable state. For example, the image around the adjacent portions of the two blocks becomes very difficult to see.

[0013]

The present invention has been made in view of the above problems, and reproduces a data file having a structure suitable for data recording / reproduction in a recording / reproduction system, particularly for recording / reproduction of image data. It is an object of the present invention to provide a digital image data output device which has good operability at the time of output and facilitates recognition of a display image to improve usability.

For this reason, for certain image data, the amount of information is compressed from this image data to generate search image data, and the original image data or the original image data is subjected to predetermined processing. With respect to the first image data as the generated image data (the image data that should originally be held as a data file), the search image data is connected as the second image data to the front side in the data file to form one unit. A data file formed as a data file is configured to be read from a recording medium and output to a display means for display, and when displaying the first image data and displaying the second image data. In doing so, the display state is changed from an arbitrary display range in the image data to a display range moved by about one screen in the display means. To configure so that it can.

Further, when displaying the first image data,
And when displaying the second image data, the display state is
The display range can be changed from an arbitrary display range in the image data to a display range moved in a large range of about one screen on the display means, and the display state can be changed from the arbitrary display range in the image data to a small range. It is possible to change the display range by shifting the range, and the operation of the large range and the small range is performed by operating keys in the same direction.

Further, when displaying the first image data, the display range can be moved to an arbitrary position, and a display showing the display range appears on the display of the second image data. To configure.

Further, when displaying the first image data,
And when displaying the second image data, the display state is
It is possible to change from an arbitrary display range in the image data to a display range moved by a range smaller than one screen on the display means, and in this case, the display is made on the changed screen before the change. The display is made so as to present the boundary between the previously displayed area and the newly displayed area.

[0018]

[Operation] The original (first) is stored in one data file.
The image data and the search image data (second image data) generated by compressing and compressing the information from the original image data, for example, are included, and the search image data is addressed in the data file in an addressable manner. Then, the original image data is arranged. Then,
Since the amount of information in the search image data is small and the image size is small, it takes only a short time to read it from the disk and display it. Furthermore, by looking at it, the entire image of the image can be easily grasped. In addition, it is possible to immediately determine whether the image recorded in the data file is a desired image.

When the second image data is viewed and the image is desired to be viewed in detail, the first image data may be displayed. At this time, the first and second image data are the same data. Since the file exists in the file, the playback access operation is not necessary, and quick display is possible.

If the dot size of the image data is larger than the displayable size, it is necessary to move the display portion so that the whole can be seen, but it is not possible to change the size of the image data. By making it possible to move a large range of about one screen from the position of (jump movement), the entire image can be confirmed quickly, and since the block is not fixed, the block boundary The part does not become difficult to see.

Furthermore, if both the jump movement and the shift movement (movement in a small range) are used together, for example, the entire image can be roughly viewed by the jump movement, or the target portion can be easily seen by the shift movement. The display position can be finely adjusted and the usability can be further improved. Here, in order to perform a plurality of movement operations in this way, for example, eight operation keys (four keys for up / down / left / right direction shift and four keys for up / down / left / right direction jump) or As described above, for example, the operation content is distinguished by the pressing time and the operation keys are also used, so that the number of keys is not increased and the operability is not deteriorated.

Furthermore, when the display portion is moved by jump movement or shift movement, it may not be known which portion of the image is being displayed in some cases, but the display showing the display range is not possible. By displaying the second image data on the display, the current display position can be easily confirmed.

Further, in the case where the jump movement is to be changed to the display range moved within a range less than one screen, that is, when the screen is jump moved up and down and left and right with some overlap areas, Since the image will be switched significantly by one display screen, it may be difficult to understand the continuity with the image you were watching before the jump, but on the screen changed by the jump movement, before the change By providing a display that presents the boundary between the area displayed in and the newly displayed area, the continuity before and after the display switching can be easily grasped.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording / reproducing apparatus as an embodiment of a digital image data output apparatus of the present invention and a related data file structure will be described below in the following order. The recording / reproducing apparatus of this embodiment is a disk recording / reproducing apparatus capable of executing recording / reproducing of character data and image data using a mini disk system, and the data file structure is applied to image data. To do. 1) Appearance and configuration of disc and recording / reproducing apparatus 2) P-TOC format on disc 3) U-TOC format on disc 4) Area structure on disc 5) Data sector format-a-Sector format-b-Category information Definition 6) Data file management method by data U-TOC-a- Cluster configuration of data U-TOC-b- CAT (cluster allocation table) sector-c- Directory sector-d- Heading sector 7) Data U-TOC management Recording / reproducing operation by 8) Image data file structure 9) Image data file management method 10) Image data shift display and jump display 11) Boundary display when image data jump display 12) Image display operation processing -a − Image display processing according to operation -b- Processing for shift display and jump display 13) Image display operation processing for performing frame display as another embodiment 14) Modified example of frame display 15) Digest file in each embodiment Creation processing 16) Application of the present invention

<1. Appearance and Configuration of Disc and Recording / Reproducing Apparatus> FIG. 1 shows the appearance of a recording / reproducing apparatus and a disc as an embodiment. Although a magneto-optical disk is used as the disk 1, the outside thereof is housed in a cartridge KT as shown in FIG. 1, and the disk recording surface is exposed by sliding a shutter ST.

The recording / reproducing apparatus 10 is provided with a disc insertion portion 11 into which a cartridge KT accommodating the disc 1 is loaded. When the cartridge KT is inserted into the disc insertion portion 11, a shutter is operated by an internal mechanism (not shown). ST is slid to expose the disc surface of the disc 1 to enable recording or reproduction.

On the upper surface of the housing of the recording / reproducing apparatus 10, there is provided a key input section (operation key) 12 for user operation. As the operation keys 12, the cursor movement or the movement of the display range (shift movement or jump movement described later)
Up move key 12 _U (hereinafter referred to as U
Key), down move key 12 _D (hereinafter referred to as D key), left move key 12 _L (hereinafter referred to as L key),
A rightward moving key 12 _R (hereinafter, referred to as R key) is provided.

Further, a mag key 12 _M (hereinafter referred to as M key) used for switching screens and the like, and a home key 12 _H (hereinafter referred to as H) used for returning to the menu screen.
Key), designation of read data (enter operation)
Target select key 12 _S (hereinafter referred to as S key) and reset key 12 _RS (hereinafter referred to as S key)
RS key) is provided.

Further, on the upper surface of the housing of the recording / reproducing apparatus 10, there is further provided a display unit 13 for displaying and outputting menu information for data retrieval, retrieved character data, and image data (black and white dot data). ing. Display 1
3 is a dot size of 640 horizontal dots and 400 vertical dots, which is a sufficient size for displaying character data.

An image scanner unit 14 detects image information written on the paper surface, converts it into dot data, and inputs it as image data. Further, reference numeral 15 is an input / output connector portion, which is adapted to be capable of transmitting / receiving data to / from other information equipment (computer, word processor, etc.) by connecting the communication cable C.

Image data input from an external device through the input / output connector section 15 has various dot sizes. For example, in the case of facsimile image data, the dot size is 1728 dots horizontally and 2100 dots vertically.
It is a dot. In addition, the image data input from the image scanner unit 14 has horizontal 1728 dots and vertical 2100 dots.
It may be a dot.

The structure of the main part of the recording / reproducing apparatus 10 is shown in FIG. In FIG. 2, the disc 1 (the cartridge KT accommodating the disc 1) is shown as loaded. Reference numeral 21 denotes a system controller for controlling various operations of the recording / reproducing apparatus, which is formed by, for example, a microcomputer. Reference numeral 22 denotes a spindle motor, and the loaded disk 1 is rotationally driven by the spindle motor 22. Reference numeral 23 denotes an optical head for irradiating a laser beam on the disk 1 at the time of recording / reproducing, which provides a high level laser output for heating a recording track to the Curie temperature at the time of recording, and a reflected light by a magnetic Kerr effect at the time of reproducing. Provides a relatively low level laser power for detecting data from the.

For this reason, the optical head 23 is equipped with a laser diode as a laser output means, an optical system including a deflecting beam splitter, an objective lens and the like, and a detector for detecting reflected light. Objective lens 23a
Is held by a biaxial mechanism 24 so as to be displaceable in the disk radial direction and the direction in which it comes in and out of contact with the disk, and the entire optical head 23 is movable in the disk radial direction by a thread mechanism 25.

Reference numeral 26 denotes a magnetic head for applying a magnetic field modulated by the supplied information to the magneto-optical disk, and is arranged at a position facing the optical head 23 with the disk 1 in between.

The information detected from the disk 21 by the optical head 23 by the reproducing operation is supplied to the RF amplifier 27. The RF amplifier 27 calculates the supplied RF signal, the tracking error signal, the focus error signal, the absolute position information (absolute position information recorded as pregroove (wobbling groove) on the disc 1), and the address information by calculating the supplied information. , Subcode information, focus monitor signal, etc. are extracted. Then, the extracted reproduction RF signal is supplied to the decoder unit 28. Further, the tracking error signal and the focus error signal are supplied to the servo circuit 29. Further, the focus monitor signal is supplied to the system controller 21.

Further, the absolute position information obtained by decoding the pre-groove information or the address information recorded as data, which is output from the address decoder 29, is supplied to the system controller 21 via the decoder unit 28 and various It is used for the control operation of.

The servo circuit 29 supplies the supplied tracking error signal, focus error signal, track jump command, seek command from the system controller 21,
Various servo drive signals are generated based on rotational speed detection information, etc. to control the biaxial mechanism 24 and the sled mechanism 25 for focus and tracking control, and the spindle motor 22 to have a constant angular velocity (CAV) or a constant linear velocity (CL).
V).

The reproduced RF signal is subjected to decoding processing such as EFM demodulation, CIRC decoding, and ACIRC decoding in the decoder unit 28, and is then subjected to predetermined processing via the system controller 21.

Further, the information supplied to the system controller 21 as the information to be recorded on the disc 1 during the recording operation is ACIRC encoded by the encoder 30.
It is supplied to the magnetic head drive circuit 31 after being subjected to encoding processing such as CIRC encoding and EFM modulation.

The magnetic head drive circuit 31 supplies a magnetic head drive signal to the magnetic head 26 in accordance with the encoded recording data. That is, the magnetic field 26 is applied to the disk 1 by the magnetic head 26.
Further, at this time, the system controller 21 supplies a control signal to the optical head 23 so as to output a laser beam of a recording level.

Reference numeral 32 denotes a conversion memory for converting the character code data into font data, which performs a font conversion process for displaying the character data read from the disk 1.

Reference numeral 33 denotes a buffer RAM, which temporarily holds dot data captured by the image scanner 14, display data to be displayed on the display unit 13, transmission / reception data by the connector unit 15, and data read from the disk 1. Functions as a temporary storage unit when outputting the.

When the recording / reproducing operation is performed on the disc 1, the management information recorded on the disc 1, that is, P-TOC, U-TOC, and data U-TOC described later are read out, The system controller 21 discriminates the address to be recorded and the address to retrieve and reproduce the data according to the management information, and this management information is held in the buffer RAM 33.
That is, the system controller 21 reads out these management information by executing the reproducing operation of the management information area (for example, the innermost circumference side of the disk) when the disk 1 is loaded, and stores it in the buffer RAM 33. The disc 1 can be referred to during the recording / reproducing operation.

Further, U-TOC and data U-TOC
Is rewritten in response to recording or erasing of data, the system controller 21 rewrites the management information stored in the buffer RAM 33 each time a recording / erasing operation is performed, and a predetermined operation is performed in accordance with the rewriting operation. The management information area of the disc 1 is also rewritten at the timing.

Reference numeral 34 denotes a communication circuit, which transmits / receives data to / from an external device via the connector section 15. A display controller 35 serves as a control circuit for causing the display unit 13 to execute display data from the system controller 21, that is, display of a search menu, display of data read from the disk 1, and the like. With the above configuration, the recording / reproducing apparatus 10 can perform the recording operation and the reproducing operation of various data with respect to the disc 1. .

<2. P-TOC Format on Disc> Next, the P-TOC format on the disc 1 will be described. In the case of a disc as a so-called mini-disc system for audio recording / playback, a premastered type (optical disc) in which music and the like are recorded in advance and data rewritable in which a user can record music data and the like are considered to be rewritable. There are discs (magneto-optical discs) and hybrid type discs that have a ROM area in which music, etc. is recorded in advance and a recordable magneto-optical area, and these discs already have data such as music depending on the type. Is recorded as P-TOC or U-TOC information.

The recording / reproducing apparatus in this embodiment utilizes the format of this mini disk system and is suitable for data recording applications.
As the management information in C and U-TOC, necessary parts are used as they are. Therefore, although the unnecessary information is included when the audio data is not recorded, the following description will also include the management information for the audio data.

As the P-TOC information, an area designation such as a recordable area (recordable user area) of the disc and management of the ROM area are performed. Further, as an audio data application, in the case of a premastered disc or a hybrid disc, it is possible to manage the music recorded in the ROM.

The P-TOC format is shown in FIG.
FIG. 3 shows P-recorded repeatedly in an area for P-TOC (for example, ROM area on the innermost side of the disc).
It shows one sector of TOC information.

The data area of the P-TOC sector is formed as a data area of 4 × 588 bytes, for example, and a synchronization pattern composed of 1-byte data of all 0s or alls 1 is recorded at the head position, and further, a cluster address and a sector. An address or the like indicating an address is added with 4 bytes, and the above is used as a header to indicate that it is a P-TOC area.

Further, an identification ID by an ASCII code corresponding to the character "MINI" is added at a predetermined address position following the header. Furthermore, the disc type, recording level, song number of the first song recorded (First TNO), song number of the last song (Last TNO), lead-out start address RO _A , power cal area start address PC _A. , U-TOC (U of FIG. 4 described later)
-TOC sector 0 data area) start address UST _A , recordable area start address RST
_A, etc. are recorded, and subsequently, a corresponding table instruction data section having a table pointer (P-TNO1 to P-TNO255) that makes each recorded song etc. correspond to a parts table in the management table section described later is prepared. ing.

Then, in the area following the correspondence table instruction data portion, (01h) to (FF) are associated with the table pointers (P-TNO1 to P-TNO255) in the correspondence table instruction data portion.
Up to h), a management table section is prepared, which is provided with 255 parts tables (the numerical values with “h” below are so-called hexadecimal notation). In each parts table, a start address and an end address as a starting point for a certain segment (in this case, a segment means a track portion where data is physically continuously recorded on a disk track) , And the mode information (track mode) of the segment (track) can be recorded.

The mode information of the track in each parts table is information indicating whether or not the segment is set to overwrite inhibition or data copy inhibition, or the like.
Whether or not it is audio information, monaural / stereo type, etc. are recorded.

In each part table from (01h) to (FFh) in the management table section, the contents of the segment are indicated by the table pointers (P-TNO1 to P-TNO255) in the corresponding table instruction data section. In other words, for the first piece of music, a certain parts table (for example, (01h) is used as the table pointer P-TNO1. However, the table pointer is actually a certain parts table at the byte position in the TOC sector 0 by a predetermined calculation process. Is recorded.) In this case, the start address of the parts table (01h) is the start address of the recording position of the first piece of music, and similarly the end address is the first piece of music. Will be the end address of the position where the song was recorded. Further, the track mode information becomes information about the first music piece.

Similarly, for the second music piece, the parts table indicated by the table pointer P-TNO2 (eg (02h))
The start address, end address, and track mode information of the recording position of the second tune are recorded in. Similarly, since the table pointers up to P-TNO255 are prepared, it is possible to manage up to the 255th song on the TOC. By forming the TOC sector 0 in this way, a predetermined music piece can be accessed and reproduced at the time of reproduction, for example.

In the case of being used for data recording as will be described later in this embodiment, or in the case of a recording / playback type disc having no premastered music area even for music, the above correspondence table is used. Since the instruction data section and the management table section are not used, each byte is set to "00h".

<3. U-TOC Format on Disc> FIG. 4 shows a format of one sector of U-TOC, which mainly records management information about a song recorded by a user and an unrecorded area where a new song can be recorded. Data area. For example, when the disc is used for music and a certain piece of music is to be recorded on this disc, an unrecorded area on the disc can be found from this user TOC and audio data can be recorded there. It is done like this. Further, at the time of reproduction, the area in which the music to be reproduced is recorded is discriminated from the U-TOC information, and that area is accessed to perform the reproduction operation.

In the U-TOC sector shown in FIG. 4, P
Like the TOC, a header is provided first, and then a manufacturer code, model code, song number of the first song (First TNO), song number of the last song (Last TN) at a predetermined address position.
Data such as O), sector usage status, disk serial number, disk ID, etc. are recorded, and the area of the recorded music and the unrecorded area recorded by the user are made to correspond to the management table section described later. The table pointers (P-DFA, P-EMPTY, P-FRA, P-TNO1 ~
Area for recording P-TNO255) is prepared.

Then, the management table portion (01h) to (FFh) 255 corresponding to the table pointers (P-DFA to P-TNO255) of the correspondence table instruction data portion is set to 255.
Each part table is provided, and each part table has a start address as a starting point, an end address as an ending point, and mode information of that segment (track mode) in the same manner as the TOC sector 0 in FIG. Has been recorded, and this U-TO
In the case of C sector 0, the segment shown in each parts table may be connected to another segment subsequently, so link information indicating the parts table in which the start address and end address of the connected segment are recorded. Can be recorded.

In the case of a mini disk system for music,
For example, the data of one song is physically discontinuous, that is, even if it is recorded over multiple segments, the playback operation will not be hindered by playing back while accessing between segments. May be recorded in multiple segments for the purpose of efficient use of the recordable area. Therefore, link information is provided, for example, numbers (01h) to (FFh) given to each parts table (actually indicated by a numerical value which is a byte position in the U-TOC sector 0 by a predetermined calculation process). The parts tables can be connected by specifying the parts table to be connected. (Because songs that are recorded in advance are not usually segmented,
As shown in FIG. 3, all the link information in the TOC sector 0 is “(00h)”. )

That is, in the management table section in the U-TOC sector 0, one part table represents one segment, and, for example, a music piece formed by connecting three segments is linked by link information. The segment position is managed by the three parts tables.

Each of the parts tables (01h) to (FFh) in the management table section of the U-TOC sector 0 has a table pointer (P-DF) in the corresponding table instruction data section.
A, P-EMPTY, P-FRA, P-TNO1 to P-TNO255)
The contents of that segment are shown below.

The table pointer P-DFA is shown for a defective area on the magneto-optical disk 1, and a track portion (= segment) which becomes a defective area due to a scratch or the like is shown.
One part table or the first part table in multiple part tables is specified. In other words, if there is a defective segment in the table pointer P-DFA
Any one of (01h) to (FFh) is recorded, and the defective segment is indicated by the start and end addresses in the parts table corresponding thereto. Further, when there is another defective segment, another part table is designated as the link information in the part table, and the defective segment is also shown in the part table. Then, if there is no other defective segment, the link information is, for example, "(00h)", and thereafter there is no link.

The table pointer P-EMPTY indicates the head part table of one or a plurality of unused part tables in the management table section. If an unused part table exists, the table pointer P-EMPTY is used as a table pointer P-EMPTY. , (01h) to (FFh) is recorded.
If there are multiple unused part tables, the part tables specified by the table pointer P-EMPTY are used to sequentially specify the part tables by link information, and all the unused part tables are linked on the management table section. To be done.

The table pointer P-FRA indicates the writable unrecorded area (including the erased area) on the magneto-optical disk 1, and the track portion (= segment) to be the unrecorded area is indicated. The top parts table in one or more parts tables is specified. That is, if there is an unrecorded area, the table pointer P-FR
Any one of (01h) to (FFh) is recorded in A, and a segment which is an unrecorded area is indicated by the start and end addresses in the parts table corresponding to that. Further, when there are a plurality of such segments, that is, when there are a plurality of parts tables, the parts table with link information of "(00h)" is sequentially specified by the link information.

FIG. 5 schematically shows a management state of a segment which is an unrecorded area by using the parts table. This is because when the segments (03h) (18h) (1Fh) (2Bh) (E3h) are unrecorded areas, this state corresponds to the corresponding table instruction data P-FR.
Continuing from A, the parts table (03h) (18h) (1Fh) (2Bh) (E3
The state represented by the link of h) is shown. The defective area and the unused parts table management mode described above are the same.

By the way, in the case of a magneto-optical disk in which no audio data such as music is recorded and there is no defect, the parts table (01h) is designated by the table pointer P-FRA, and by this, the recordable user area of the disk is designated. Indicates that the entire area is an unrecorded area (free area). In this case, the remaining part tables (02h) to (FFh) are not used, so the part table (02h) is specified by the table pointer P-EMPTY described above, and the part table (02h) is also specified. The part table (03h) is specified as the link information, and the part table (0
4h) is specified and the parts table (FFh) is linked. In this case, the link information of the parts table (FFh) is set to "(00h)" indicating that there is no connection thereafter.

The table pointers P-TNO1 to P-TNO255 indicate music pieces recorded by the user on the magneto-optical disk 1. For example, in the table pointer P-TNO1, one or a plurality of pieces of data in which the first music piece is recorded are recorded. A parts table indicating the temporally first segment of the segments is specified.

For example, the track of the first music is not divided into tracks on the disc (that is, one segment).
When recorded, the recording area of the first music piece is recorded as the start and end addresses in the parts table indicated by the table pointer P-TNO1.

Further, for example, when the second music piece is discretely recorded in a plurality of segments on the disc, each segment is designated in a temporal order to indicate the recording position of the music piece. In other words, from the parts table specified by the table pointer P-TNO2, further parts tables are sequentially specified by the link information according to the temporal order, and the parts table whose link information is "(00h)" is linked. (The above-mentioned form similar to FIG. 5). Thus, for example, all the segments in which the data constituting the second music is recorded are sequentially designated and recorded, so that the data of the U-TOC sector 0 is used to reproduce the second music or the second music. When overwriting the area (1), it becomes possible to access the optical head 3 and the magnetic head 6 to take out continuous music information from discrete segments, and to perform recording using the recording area efficiently.

When the present invention is used for recording general data such as character data and image data as described later in this embodiment, the above-mentioned correspondence table instruction data part and management table part are also used in this U-TOC. Since it is not, it is all set to "00h".

<4. Area Structure in Disc> Here, the area structure in the disc 1 will be described, and the positional relationship and management mode of the above-described P-TOC and U-TOC will be described. In the case of a magneto-optical disk, an area where data is recorded by embossed pits (pre-mastered area) is roughly divided into pit areas shown in FIG.
And a so-called magneto-optical area, which is divided into groove areas provided with grooves. Here, the premastered area is a reproduction-only management area in which the above-mentioned P-TOC is recorded, and the P-TOC sector is repeatedly recorded.

The minimum recording / reproducing operation unit for the recording track on the disc 1 is a cluster, that is, the recording operation or the reproducing operation is always executed with one cluster as a minimum unit. One cluster is composed of 36 sectors as shown in FIG. However,
Four of these sectors are sub-data areas used as sub-data and linking areas.
Recording of data, audio data, or general data other than audio realized in this embodiment is performed in the main data area of 32 sectors.

As shown in FIG. 6, a groove area is formed, for example, from cluster address "0000h" to "0BFFh", following the premastered area on the innermost side of the disk 1. Of these, the cluster address "0" is used.
000h ”to the address indicated as the lead-out start address RO _A in the P-TOC is a recordable recordable area.

Further, of the recordable areas, the recordable user area in which the data is actually recorded is located at the position indicated as the recordable user area start address RST _A in the P-TOC (for example, the cluster address “0032h”). To the lead-out start address RO _A.

In this case, the cluster address "0000
h ”to the recordable user area start address RST _A (cluster address“ 0032h ”),
The recording / playback management area is an area in which the above-mentioned U-TOC and the like are recorded. One cluster from the position indicated as the power cal area start address PC _A in the recording / reproducing management area is provided as a laser power calibration area.

The U-TOC is the cluster address "0000".
In the recording / reproducing management area of "h" to "0032h", three clusters are continuously recorded at a required position.
Which cluster address U-TOC is recorded in is P
-U-TOC start address UST _{A in} TOC
Shown in.

As described above, the area management on the disk is P
-When the TOC is used and audio data is recorded in the recordable user area, the management of the recordable user area is performed in the form described above.
-Performed by TOC.

Further, in this embodiment, since data other than audio data is recorded / reproduced in the recordable user area, the data U-TOC described later is provided as information for managing this. This data U-TOC Is the cluster address “0000h” to “00
32h ”at the required position in the recording / playback management area.
Clusters are recorded continuously, and the head position is, as shown in the figure, a cluster address offset by, for example, "10h" from the U-TOC start position indicated by the U-TOC start address UST _A in the P-TOC. Is set as. Alternatively, if the start position of the U-TOC is a rear address position from “0020h”,
If three clusters are recorded from the position offset by “h”, and if the cluster extends beyond “0032h” (that is, the recordable user area), from the cluster address position offset by, for example, “−10h” from the start position of the U-TOC. Will be recorded. In any case, the data U-TOC is also recorded in the recording / reproducing management area, and this data U-TOC manages the groove area for data recording / reproducing.

Then, the data U in the recording / reproduction management area
-The TOC start address is not directly indicated in the P-TOC, but only "10h" or "-10h" is the cluster address from the U-TOC start position address indicated in the U-TOC start address UST _A in the P-TOC. Is obtained by adding.

Of course, when recording / reproducing data, the area used for actual data is the recordable user area. The format of the data area and the data U-TOC for data recording / reproducing in this embodiment will be described below.

<5. Data sector format>
The structure of the data sector provided in the recordable area for use in actual data recording / reproduction is shown in FIG.
~ It demonstrates as follows using FIG. -A- Sector format -b- Definition of category information

-A- Sector format The minimum recording / reproducing operation unit on the disk 1 (that is, it is also the input unit of the encoder 30 or the output unit of the decoder 28 in FIG. 2) is one cluster as described above. Although there are 32 sectors as the main data area in each of the above, the structure shown in FIG. 8 is the one sector.

FIG. 8 generally shows the format of the data sector used in this embodiment (data U-
(Including sectors in TOC). One sector has a total size of 4 × 588 bytes, and the first 12 bytes of the sector is a synchronization pattern. For example, a CD-ROM.
The synchronization pattern of is adopted.

The subsequent 16 bytes are provided as a header. As the header, first, the cluster address is recorded in 2 bytes (Cluster H, Cluster L), and then the sector address is recorded in 1 byte (sector). Further, the mode information specified by the CD-ROM is recorded as the mode information in the subsequent 1 byte. Furthermore, in the next 4 bytes, the address area for the application side (Logical
Sector 0 to Logical Sector 3) are provided.

Next, information indicating the error correction mode (Mod
e), the category information (Cat
egory), and index information (Index) indicating parameters of the data file is provided. A specific example of the index information is determined by the category information and the application (described later), but when the index information is “00h”, it indicates that the data recording content (that is, the volume) is zero. . The information (Mode) indicating the error correction mode and the category information (Category) indicating the attribute of the data file will be described later. The system ID is added to the last 4 bytes of the header.

Following such a 16-byte header, 2
A 048 byte data area is prepared. The 276 bytes after the data area are regarded as an additional area (Aux
0-Aux 275).

As described above, the header contains the information (Mode) indicating the error correction mode at the 9th byte, and there are three possible error correction modes: mode 0, mode 1 and mode 2. Information for identifying the mode is shown as information (Mode). The format of the data sector in each mode will be described in order.

The format of the mode 0 data sector is shown in FIG. As information indicating the error correction mode, the ninth byte of the header ((Mode) of the first byte on the fifth line in the figure) is set to "00000000", that is, "00h". In this mode 0, no area for adding data for error detection and correction is provided. In other words, the additional area (Aux 0 to Aux 275) after the 4 × 519th byte remains undefined.

When the format of the data sector is configured as described above, the reproduction information from this disc is only subjected to error detection and correction processing by the CIRC code in the decoder 28 shown in FIG. 2 in the recording / reproducing apparatus. However, as well known, the CIRC code has a practically sufficient error correction capability, and no particular problem occurs in error processing.

The format of the data sector in mode 1 is shown in FIG. As information indicating the error correction mode, the 9th byte (Mode) of the header is set to "00000001", that is, "01h", as shown in the figure. In this mode 1, 4 bytes of error detection parity is added as error detection and correction data. That is, parity (ECD0 to ECD3) is added to 4 bytes following the 2048-byte data area.
As a result, the undefined additional area is (Aux 0 to Aux 271)
272 bytes. This parity P _(X) (that is, E
Generator polynomial for CD0～ECD3) _{is, P (X) = (x} 16 + x 15 + x 2 +1) (x 16 + x 2 + x +
1) is.

When the format of the data sector is configured as described above, regarding the reproduction information from this disc, the recording / reproducing apparatus does not use the error detection result from the decoder 28 shown in FIG. The error can be detected only by the digital signal output of.

The format of the data sector in mode 2 is shown in FIG. Information (Mode) of the 9th byte of the header indicating the error correction mode is "000" as shown in the figure.
00010 ”, that is,“ 02h ”. In this mode 2, data for error detection and correction is used for all the additional areas. In other words, P parity (P-pari
ty0 to P-parity171) are added, and Q parity (Q-parity0 to Q-parity103) is added to the subsequent 104 bytes. As a result, an error correction capability of up to 80 bytes is realized. The P parity and the Q parity have the same structure as the Reed-Solomon code at a distance (26, 24) from the Garoa Field (2 ⁸ ) adopted in a so-called CD-ROM.

In these modes 0 to 2,
Regardless of the mode, the byte position in the sector is fixed to the 2048th byte from the 29th byte to the 2076th byte (7th line to 518th line in the figure) as a sector. Even a recording / reproducing apparatus compatible with the above can perform a reproducing operation on a disc in which mode 1 or mode 2 is adopted without any trouble. That is, by adopting the above-mentioned mode format, the disc has backward compatibility with the recording / reproducing apparatus.

-B- Definition of category information Next, the definition of the category information provided in the 10th byte of the header will be described. ... Category information (Category) = "00h". Indicates that this sector is an open sector with no data recorded, regardless of the state of the data area. Therefore, when erasing the contents of the sector, this category information (Category) may be rewritten to "00h".

・ ・ ・ Category =
In the case of "01h". Indicates that binary data is recorded in this sector. There are no restrictions on the type of data. In such a sector, the bytes recorded in the data area are used as they are as digital data to be passed to the application (software) side. When the category information is "01h", the following index information indicates that the data area is secured by the size of the value recorded in the byte as (Index) x 128 bytes. Become. Since the data area is 2048 bytes, the index information (In
dex) takes any value from "00h" to "10h".

... Category information (Category) =
For "10h" to "1Fh". Indicates that document (document) data is recorded in this sector. In this case as well, the subsequent index information similarly indicates that the data area is secured by the size of the numerical value recorded in the byte as (Index) × 128 bytes.

... Category information (Category) =
In the case of "20h" to "2Fh". This shows that a single dot image, that is, one image file is recorded as monochrome dot data in this sector. In this case as well, the subsequent index information similarly indicates that the data area is secured by the size of the numerical value recorded in the byte as (Index) × 128 bytes. In addition, "20h" ~ "2F
The detailed definition of “h” will be described later with reference to FIG.

[Category] =
In the case of "30h" to "3Fh". In this sector, multiple dot images, that is, a plurality of image files are recorded as monochrome dot data. In this case as well, the subsequent index information similarly indicates that the data area is secured by the size of the numerical value recorded in the byte as (Index) × 128 bytes.

... Category information (Category) =
For "E0h" to "E2h". Indicates that this sector is used as an allocation table. In the case of this embodiment, the sector corresponds to a cluster allocation table (CAT) described later. The cluster allocation table (CA
T) specific data format (ie 20
The format that defines the usage pattern of the 48-byte data area will be described later. In this case, as the subsequent index information, (Index) = “00h” is not used, (Index)
When it is "00h", it means to use.

... Category information (Category) =
For "F0h" and "F1h". This sector is used as a directory. A specific data format as a sector used as a directory in this embodiment (that is, a format that defines the usage form of a 2048-byte data area) will be described later.

In this case, the subsequent index information indicates the number of directories in which the numerical value shown as (Index) is recorded. As will be described later, 64 units of directories can be configured in a sector, so that the index information (Index) indicates any value from 0 to 64.

... Category information (Category) =
In the case of "FEh" and "FFh". This sector indicates that it is a sector (hereinafter referred to as a heading sector) in which reference information (reference file) by a document or dot image formed by extracting a part of the data file is recorded. A specific data format as a sector used as a heading sector in this embodiment (that is, a format that defines the usage pattern of a 2048-byte data area)
Will be described later.

In this case, the subsequent index information indicates the number of reference files (heading parts) in which the numerical value shown as (Index) is recorded. As will be described later, the heading parts are 32 units in the case of a document in one sector (32 units can be recorded in a 2048-byte data area if one unit is 64 bytes), and 4 units (1 unit in the case of a dot image).
If the unit is 512 bytes, 4 in the data area as well.
Since the unit can be recorded, the index information (In
dex) indicates a numerical value of 0 to 32 or 0 to 4.

<6. Data File Management Method by Data U-TOC> A data file management method when recording / reproducing on the disc having the above format will be described below. The format of the management information will be described below. -A- Cluster configuration of data U-TOC-b- CAT (cluster allocation table) sector-c- Directory sector-d- Heading sector

-A- Cluster Configuration of Data U-TOC When the disc 1 is inserted into the recording / reproducing apparatus 10, the recording / reproducing apparatus 10 first reads the P-TOC and holds it in the buffer RAM 33 as described above. And that P-
Of TOC information, U-TOC start address US
Confirm the recording position of U-TOC with reference to T _A. As described above, the data U-TOC has a cluster address of "10" from the U-TOC start address UST _A.
Since it is recorded at a position offset by “h” or “−10h” (see FIG. 6), the position is accessed to capture the data U-TOC. If the data U-TOC does not exist at that position, the disc is determined to be a virgin disc on which no data is recorded, and the data U-TOC is initialized. When the data U-TOC is fetched (or when the initial management information is generated and fetched), the management information is used to manage the area in which actual data recording / reproduction is performed and the data search is performed. Will be done.

The cluster of the data U-TOC configured so that the recording / reproducing of data can be managed will be described. The data U-TOC has a size of one cluster, and the above-mentioned U in the recording / reproduction management area.
-The TOC start address UST _A is triple-written over three clusters at a position offset by "10h" or "-10h".

Then, in the data U-TOC, a cluster allocation table (hereinafter, referred to as a cluster allocation table) showing information on a combined state of clusters (clusters from "0000h" to "0BFFh" in FIG. 6) for a recordable area for recording / reproducing data. CAT), a data file name, etc. are stored, and the beginning address position of the data file (in the case of a directory that exists in the lower layer and the directory indicating it, the address position of the lower layer directory), etc. And a sector having a heading part as reference information.

The structure of 32 sectors (1 cluster) of the data U-TOC is shown in FIG. First, the first three sectors (sector 00 to sector 02) are CAT (CAT0 to CAT0).
CAT2). Subsequent sector 03 is allocated for the root directory, starting with sector 04 ...
"Reserved" in 28 sectors up to sector 1F
Is prepared so that it can be used for directory expansion and as a heading sector described later.

-B-CAT (Cluster Allocation Table) Sector The format of CAT0 assigned to sector 00 is shown in FIG. In the case of the sector used as CAT, the system ID (ID0 to ID in FIG. 8) assigned to the last 4 bytes in the 16-byte header is used.
In 3), the character "MINX" is recorded by the ASCII code as shown in FIG. This "MIN
X ”is data U whose sector is not for audio
-It indicates that it is used as a TOC.
Therefore, when the data U-TOC is initialized or rewritten, the recording / reproducing apparatus 10 uses this "MIN".
X ”will be recorded as a system ID in each sector of the data U-TOC. This distinguishes it from "MINI" which is the identification ID of the P-TOC.

When reading the data U-TOC, the system ID "MINX" is referred to,
Whether or not the sector is the sector as the data U-TOC is determined, and if it is confirmed that the sector is the data U-TOC, the information of the sector is used as the management information.

Since the sector of the format of FIG. 13 is CAT (CAT0), the 10th sector in the header is used.
The category information of the byte is “11100000”, that is, “E0h”, and this sector is CAT (CAT
0).

C is in the 2048 bytes which is the data area.
Data as an AT unit is recorded. CAT
For all clusters in the recordable area (Fig. 6
From "0000h" to "0BFFh")
The binding state data for
First, in CAT0, information on the 0th to 1023th clusters is allocated and 1024 CATs are allocated.
The unit is recorded.

Of the clusters in the recordable user area, the clusters that cannot be handled by 1024 CAT units of CAT0 are described later in C.
It will be managed by AT1 and CAT2. In this way, the three-sector CAT can cover all clusters from "0000h" to "0BFFh".

As the CAT unit, 2 bytes are allocated corresponding to one cluster, for example, the 0th
The cluster is represented by (CAT000-H) and (CAT000-L). Similarly, for example, the information about the fourth cluster will be shown in (CAT004-H) and (CAT004-L).

The structure of each CAT unit is shown in FIG. The 2-byte CAT unit is made into words W0 to W3 of 4 bits each. The word W0 indicates the classification of the cluster, and the words W1 to W3 indicate the cluster number to be accessed when the data file continues to a cluster other than continuous clusters.
It is used only when indicating the length of continuous free clusters, or when indicating the combined information in the case of the first cluster of the data file.

The definition in word W0 is shown in FIG.
When the word W0 = “Fh”, it indicates that the cluster is a recordable free cluster. In this case, the lengths of consecutive free clusters are indicated in the words W1 to W3. The word W0 = “Eh” indicates that the cluster is a cluster that is the end of file data. The word W0 = “Dh” indicates that the cluster is a cluster that is continuous to the next cluster in a certain file data. Word W0 = "C
“H” indicates that the cluster is the first cluster of the file data having the cluster. Word W0 = "Bh"
From that cluster, it is indicated that the cluster indicated by the words W1 to W3 should be followed.

The word W0 = “6h” to “1h” indicates that the cluster is a record-inhibited cluster, “6h” is the cluster at the end of the data file, and “5h” is the next cluster. Continuous clusters,
"4h" is the first cluster of the data file, "3h"
Indicates that the cluster should jump to the cluster of the address indicated by the words W1 to W3.

When the word W0 = "0h", it means that the cluster is a cluster for which recording and reproduction are prohibited.

The word W0 = “Ch” or “4h”
If the word W1, W2, W3 is "000h" when it is the first cluster of the data file, it indicates that the data file is continuous to the next cluster, and the words W1, W2, W3 are "FFFh". ], It means that the data file ends only in the first cluster, which is the first cluster, and the words W1, W2, W
If 3 is not "000h" or "FFFh", the data file is word W1 from the first cluster.
This indicates that the clusters indicated by W2 and W3 are continuous.

With the CAT unit thus constructed, when one data file is formed of, for example, four clusters as the CAT, in each CAT unit corresponding to the four clusters, "W0, W1, W
2, W3 ”is“ C000h ”,“ D *** h ”, and“ D ** ”
* H ”and“ E *** h ”(*, that is, W1, W2
W3 is not specified). For example, if the 0th to 3rd clusters are composed of data files in this way, (CAT000
-H, CAT000-L) CAT unit, (CAT003-H, CA
T003-L) CAT unit with "C000h""D***"
It will be recorded as "h", "D *** h", and "E *** h".

Although the CAT is constructed in the above management form, since the recording tracks are formed in a spiral shape on the disk 1, it is considered that the data files are often recorded in continuous clusters. To be Therefore, the above CAT form is often word W1.
For W3, there is no need for calculation, and the cluster connection state can be grasped very efficiently.

The format of the CAT1 recorded in the sector 01 of the data U-TOC is shown in FIG. 14, and also in this sector, the system ID assigned to the last 4 bytes in the 16-byte header is "MINX". Is recorded by an ASCII code.
Further, the category information of the 10th byte in the header is "11100001", that is, "E1h", which indicates that this sector is CAT (CAT1).

C is in the 2048 bytes which is the data area.
Similar to AT0, data as 1024 CAT units are recorded. Here, the 1024th to the 20th
Information about 47 clusters is assigned. CA
T unit (CAT1024-H, CAT1024-L) ~ (CAT2014-H
, CAT2047-L) and the structure of the CAT unit is as shown in FIGS.

The format of CAT2 recorded in sector 02 of data U-TOC is shown in FIG. 15, and in this sector, the system ID assigned to the last 4 bytes in the 16-byte header is "MINX". Is recorded by an ASCII code.
Also, the category information of the 10th byte in the header is “1111000”, that is, “E2h”, which indicates that this sector is CAT (CAT2).

C is in the 2048 bytes which is the data area.
Similar to AT0 and CAT1, data of 1024 CAT units is recorded. Here 2048
To 3071 clusters are assigned information. CAT unit (CAT2048-H, CAT2048-L) ~
The structure of the CAT unit up to (CAT3071-H, CAT3071-L) is as shown in FIG. 16 and FIG.

The above CAT0, CAT1 and CAT2 sectors manage the combined state of all clusters in the recordable area.

-C-Directory sector Sector (or sector 04 to sector 04-formed as the root directory in sector 03 of data U-TOC)
(Sector formed as a directory on 1F)
The format of is shown in FIG.

In the case of a sector used as a directory, the system ID (ID0 to ID in FIG. 8) assigned to the last 4 bytes in the 16-byte header is used.
As 3), as in the case of CAT, "MINX" is recorded by an ASCII code as shown in FIG. This "MINX" indicates that the sector is used as data U-TOC. Therefore, when the data U-TOC is initialized or rewritten, the recording / reproducing apparatus 10 records this "MINX" as a system ID also in the sector as a directory.

Then, in the recording / reproducing apparatus 10, as in the case of CAT, the directory sector is also processed by this "M".
INX ”is referred to to determine whether or not the sector is a sector as the data U-TOC, and when it is confirmed that the sector is the data U-TOC, the information of the sector is set as management information. Will be used as.

Since the format of FIG. 18 indicates a directory, the category information of the 10th byte in the header is "1111000 *", that is, "F
0h ”or“ F1h ”indicates that this sector is a directory.

Data as a directory unit is recorded in 2048 bytes serving as a data area.
The directory unit (that is, one directory) is provided corresponding to a certain data file,
It consists of 32 bytes. Although FIG. 18 shows only one directory unit consisting of 32 bytes,
In the 048-byte data area, 64 directory units of 32 bytes can be similarly recorded.

The name of the data file is recorded in the first 8 bytes (Name0 to Name7) of the directory unit. Also, the following 3 bytes (Suffix0 to Suffix2)
Is assigned so that the extension is recorded. For example, when searching for a data file recorded in the recordable user area, the name and extension of this directory unit are used.

Category information is contained in 1 byte following the extension.
(Category) is arranged. Category information (Categor
y) indicates the attribute of the corresponding data file of this directory unit, and the same code as the category information described in the format of the data sector is used.

The following 2-byte volume information (Volume1-
0, Volume1-1) represents the number of clusters used by the data file indicated by this directory. That is, it indicates how many clusters are required to access the data file.

[0136] The volume information (Vo
lume2-0, Volume2-1) represents the memory capacity of the host device required to receive and use the data file indicated by this directory. This volume information (Vo
lume1-0, Volume1-1) or (Volume2-0, Volume2-1
) Is "00h" when it is not defined (that is, when it is left to the application side).

The following 2-byte index information (Index
0, Index1) is used when a heading sector as reference information of the data file exists in the same cluster as this directory sector, and the sector number of the heading sector is recorded as index information (Index0). , Index information (In
The part number (described later) within the sector of the heading sector is recorded as dex1). If there is no heading sector, index information (Inde
x0) = “00h”.

Further, the date and time when the data file corresponding to the directory was last updated is recorded in the subsequent 5 bytes after 1 byte. That is, the year, month, day, hour, and minute information are (Year), (Month), (Day), and (Hou), respectively.
r), recorded in the byte as (Minutes).

Then, the address of the corresponding data file is recorded. That is, the cluster address is indicated by 2 bytes of (Cluster-H) and (Cluster-L), and the sector address is indicated by 1 byte of (Sector). A directory unit is formed with the above configuration, and functions as search information for each data file.

If the 12th byte category information (Category) in this directory unit is "F0h" or "F1h" indicating a directory, the sector indicated by that directory unit is the directory one level below. Becomes That is, it is used when hierarchizing directories. In this case, mixing with other directories is prohibited.

When the file structure is hierarchized, a directory unit in which the 12th byte category information (Category) of the directory unit indicates a directory is provided in the root directory of sector 03 of the data U-TOC. A lower directory unit will be created at the address indicated by the directory unit. Of course, the same applies when creating a lower directory unit.

In this case, in this embodiment, the lower directory units can be provided in the sectors 04 to 1F shown in FIG. When the directories are hierarchized, it is necessary to repeatedly access the directory and follow its chain when searching for data in conventional information equipment, and finally reach the data file. In the case of the example, the directories are all concentrated in the data U-TOC, that is, in one cluster. As described above, since the minimum unit of recording / reproducing operation is a cluster, as long as all directory units chained in a hierarchical structure are present in one cluster, access operation between directories becomes unnecessary, Access to data files 1
Only one time is required. Therefore, the efficiency and speed of the search operation can be significantly improved.

If all sectors of the data U-TOC cluster are used, a maximum of 28 directory sectors can be configured, and 64 sector directory units can be formed in each sector. A maximum of 1729 directory units can be formed, and it is possible to deal with a fairly large scale hierarchy. If a directory larger than that is required, a new cluster for the lower layer is provided at an arbitrary location in the recordable user area (where 3 clusters can be recorded continuously) for recording data, and the directory is created. It may be formed.

FIG. 19 shows a conceptual diagram of the directory hierarchical structure. Each block in FIG. 19 indicates a directory unit, a block indicated by the name "DIR *" indicates a hierarchical directory unit, and a unit indicated by the "File *" name indicates a directory unit corresponding to an actual data file. Let's show.

In the hierarchically-structured directory unit of "DIR *", the sector address indicating the directory unit in the lower layer is recorded (solid arrow). On the other hand, "Fil" is the bottom layer and shows the actual data file.
The cluster address of the data file is recorded in the directory unit of "e *" (dotted line arrow). It is assumed that these directory units are recorded in the sectors 03 to 08 in the data U-TOC as shown on the left side of the drawing.

The data file name is now "FileE".
Considering that the data file recorded in the cluster 500 is accessed, the directory unit “D” recorded in the sector 03 as the root directory is considered.
"IR0" to "DIR1" → "DIR3" → "DIR
4 ”→“ FileE ”, the cluster address of the data file is searched by the directory unit“ FileE ”through the path of the directory unit chained to access the data file in the cluster 500. In other words, the sectors 03 to 07 are traced, but since these sectors 03 to 07 exist in the same cluster, data search / execution can be actually performed by only one access to 500 clusters. Becomes

-D- Heading Sector Next, the heading sector will be described. Data-T that can be formed as a directory sector as described above
The sector in OC can also be used as a heading sector. A format when the sector is used as a heading sector is shown in FIGS. Note that FIG. 20 shows a heading sector in which reference information by characters is formed, and FIG. 21 shows a heading sector in which reference information by dot data is formed.

First, the case where the reference information in characters of FIG. 20 is provided as a heading sector will be described. When a certain sector in the data U-TOC is used as a heading sector, the system ID (ID0 to ID3 in FIG. 8) assigned to the last 4 bytes in the 16-byte header is CAT and directory. As in the case, "MINX" is recorded by the ASCII code. This "MINX" indicates that the sector is used as data U-TOC. Therefore, when the heading sector is formed in the data U-TOC, the recording / reproducing apparatus 10 sets this "MI".
NX ”will be recorded in the heading sector as a system ID.

Then, in the recording / reproducing apparatus 10, as in the case of the CAT and the directory, the heading sector is also referred to by the system ID "MINX".
Whether or not the sector is the sector as the data U-TOC is determined, and if it is confirmed that the sector is the data U-TOC, the information of the sector is used as the management information.

Further, in order to indicate that this sector is a heading sector (heading sector of character data), the category information of the 10th byte in the header is "11111111", that is, "FFh".

Data as a heading part which is reference information corresponding to a predetermined data file is recorded in 2048 bytes which is a data area. The heading part (that is, one piece of reference information) is provided corresponding to a certain data file, for example, by extracting the first letter of the data file, and is composed of 64 bytes. Of course, the heading part is not limited to the initial letter, but may be a character portion designated by the user or a character portion designated by a program on the application side.

In FIG. 20, (Hd-Data0) to (Hd-Data63) 1
Although only one heading part is shown, the data area of 2048 bytes is also composed of 64 bytes.
2 units of heading parts can be recorded. The number of heading parts recorded in one sector is indicated by Index in the header. Then, each heading part is chained to a specific directory unit (that is, a specific data file) by recording the sector number and the part number as index information (Index0, Index1) in a certain directory unit as described above. ing.

Next, a case where the reference information by the dot data of FIG. 21 is provided as a heading sector will be described. When a certain sector in the data U-TOC is used as a heading sector in which reference information by dot data is recorded as in the case of characters, as a system ID assigned to the last 4 bytes in a 16-byte header. As in the case of CAT and directory, "MINX" is recorded by ASCII code.

Further, in order to indicate that this sector is a heading sector (heading sector of dot data), the category information of the 10th byte in the header is "11111110", that is, "FEh".

In the 2048 bytes serving as a data area, data as a heading part serving as reference information corresponding to a predetermined data file is recorded. In this case, the heading part corresponds to a certain data file, for example, a part of the data file is extracted and generated, or a related pattern is arranged (so-called icon), and is composed of 512 bytes. It In this case, of course, various data parts can be considered when the dot data is extracted from the data file.

Then, in FIG. 21, (Hd-Data0) to (Hd-D
Although only one heading part recorded as "ata511)" is shown, 4 units of heading parts consisting of 512 bytes can be recorded in the data area of 2048 bytes. The number of heading parts in one sector is indicated by the Index in the header. Then, each heading part is chained to a specific directory unit (that is, a specific data file) by recording the sector number and the part number as index information (Index0, Index1) in a certain directory unit as described above. ing.

The reference information as the heading parts is used as a parameter other than the file name when a data file is searched for, for example, facilitating a user's file selection operation and realizing a variety of program searches. is there.

For example, when the data file has character information, it can be used as a keyword search. In particular, when searching for a data file having a specific keyword from data files shown in a plurality of directories, the file name is often not sufficient, but in such a case, each directory unit By referring to the information of the chained heading parts, it is possible to sufficiently perform the keyword search.

Further, in the present embodiment, since such a heading sector is provided in the same cluster as the directory, no extra access operation is required even when performing a keyword search, and a quick keyword search is realized. Further, as an aid to the user, the beginning of the file, the icon, and the figure in the file are held as a heading part to assist the user in identifying the contents of each file.

As described above, the data U-TOC including the CAT sector, the directory sector, and the heading sector realizes the data management function when recording / reproducing general data.

In other words, it is realized as a recording medium for an information device capable of inputting / outputting (and recording / reproducing) a document data file and its file name, and communicating these. Also, image information (dot data) digitized by an image scanner or the like and arranged according to a predetermined rule.
Similarly, input and output (and record /
It is established as a recording medium for an information device capable of reproduction and communication.

<7. Recording by data U-TOC management /
Reproduction Operation> The CAT, directory and heading sector in the data U-TOC are configured as described above. The operation of the recording / reproducing apparatus 10 at the time of recording / reproducing data using such data U-TOC as management information is shown in the flowchart of FIG. Note that this flowchart shows the control processing operation of the system controller 21 in the recording / reproducing apparatus 10.

When the disc 1 is inserted into the recording / reproducing apparatus 10, the recording / reproducing apparatus 10 first accesses the P-TOC, reads the P-TOC data, and holds it in the buffer RAM 33 (F101). . However, P-TO
If P-TOC is not found during C access, it is determined that the disc is not proper and error processing is performed (F
102 → F103).

After reading the P-TOC data, the P
-In the TOC information, the U-TOC start address U
Referring to ST _A, to confirm the recording position of the U-TOC (a position to be recorded). Then, it is determined whether or not the cluster address portion of the U-TOC start address UST _A is smaller than the cluster address “20h” (F
104). If UST _A ≤ “20h”, there is room to record three consecutive clusters of data U-TOC in the recording / reproducing management area at the address position after the recording position of U-TOC. For this disc, UST _A + "10
Since the position of “h” is set as the start address of the data U-TOC (or is set thereafter), UST
_A + “10h” is grasped as the start address Ad (DU) of the data U-TOC (F105).

If UST _A >"20h",
Next, it is determined whether or not the cluster address portion of the U-TOC start address UST _A is an address smaller than the cluster address “30h” (F104 → F106). UT
OC start address UST _A is cluster address “3
If the address is larger than "0h", the U-TOC is not recorded at the proper position, and it is determined that the disc is not a proper disc, and error processing is performed (F106 → F103).

If UST _A ≤ "30h" in step F106, there is room to record three consecutive clusters of data U-TOC in the recording / reproducing management area at the address position ahead of the recording position of U-TOC. For discs, the position of UST _A- "10h" is the data U-TOC.
Since it is set as the start address of (or is set later), UST _A- “10h” is set as the data UT.
Grasping as OC start address Ad (DU) (F10
7).

When the address of the data U-TOC is grasped as described above, it waits for an instruction to record, reproduce or erase the data (F108). If reproduction is instructed, the process proceeds to step F109 to access the data U-TOC at the address Ad (DU). Where the data U
If the -TOC is not found, that is, the data file has not been recorded previously, and the data U-TOC has not been generated, error processing (processing without a file) is performed (F110 → F112).

If the data U-TOC exists at the address Ad (DU), the data U-TOC is read and the data file is searched by the above-mentioned directory or heading data (F111). If the required data file is found, the address of the data file is accessed (F113 → F114), the data is read and the data is read into the buffer RAM 33 (F115). Of course, in this reproducing operation, after confirming the address of the first cluster of the data file to be reproduced from the directory, the CAT refers to the cluster connection state to perform cluster access and reproduce the data file. .

If the required data file is not found by searching the directory, error processing is performed assuming that there is no file (F113 → F112).

If the recording instruction is given in step F108, the process proceeds to step F116, and the address Ad
Access the data U-TOC in (DU). Here, if the data U-TOC is not found, that is, the data file has not been recorded before, the data U-T
It is considered to be a virgin disc in which no OC was generated.

On the other hand, the data U-TO is set to the address Ad (DU).
If C is found, it is compared with the empty area indicated in the data U-TOC in order to determine whether the size of the data file that is the recorded data is the recordable size as it is (F118). If there is sufficient free area, the data file is recorded in the free area on the disc (F119), the data U-TOC is updated according to the recording operation, and the processing is finished (F120).

When the data U-TOC does not exist on the virgin disk, the disk capacity is calculated from the P-TOC.
(F121). Then, with this as an empty area, it is compared with the size of the data file in step F118. If the free area is sufficient, the data file is recorded in the free area on the disc (F119), and in this case, the data U-TOC is newly generated according to the recording operation (initialization and (Update), write to the position of the address Ad (DU), and the process ends (F120). If it is determined in step F118 that the size of the data file is larger than the free area, an error process is performed to determine that recording is impossible due to overvolume (F122).

If the deletion is instructed in step F108, the process proceeds to step F123, and the address Ad (DU)
Access the data U-TOC in. Here, if the data U-TOC is not found, that is, the data file has not been recorded previously and the data U-TOC has not been generated, an error process (process without a file to be erased) is performed ( (F124 → F125).

When the data U-TOC exists at the address Ad (DU), the data U-TOC is read and the data file designated as the data to be erased is searched by the above-mentioned directory (F126). If a data file designated as erase is found, the data U-TO
Delete the directory unit in C. Then, the data U-TOC is updated according to this erasing operation (F128). If the required data file is not found by searching the directory, error processing is performed with no corresponding file (F127 → F125).

<8. Structure of Image Data File> As described above, the recording / reproducing apparatus of this embodiment is capable of recording / reproducing character data or image data. Hereinafter, particularly, as recording / reproducing operation of image data and a data file of image data, I will explain the structure of.

Considering the case of recording image data of facsimile A4 size (horizontal 1728 dots, vertical 2100 dots) on a disk and reproducing this, as in the case described above with reference to FIG. Is 640 dots horizontally and 400 dots vertically, so only part of it can be displayed. Therefore, in order to see the entire image, it is necessary to move the display area, so whether or not the image (image data file) read from the disc and displayed and output is the image desired by the user. In many cases, it cannot be immediately determined. Also,
It is very difficult to capture the whole image.

When recording A4 size image data of a facsimile as a data file,
The data of 728 dots × 2100 dots is recorded as it is, and the data is recorded as MH code (Modified Huffman).
It is conceivable to perform compression encoding so that the amount of information is compressed to about 1/4 to 1/8 using the code and record this.

First, when data (uncompressed data) of 1728 dots × 2100 dots is recorded as it is, the amount of information is 1728 × 2100 = 3628800 dots, which is 362880
Since 0/8 = 453600, that is, the information amount is 453600 bytes. As explained in FIG. 8, the size of the data area in one sector is 2048 bytes, so in order to record uncompressed data, 453600 / 2048≈221.5,
221.5 Sectors are required. And as shown in Fig. 7, one cluster uses 32 sectors, so 221.5 / 32
≒ 6.9, which is 6.9 clusters. Since the minimum unit of recording and reproduction is 1 cluster, at least 7 clusters are required. The time required to play one cluster is 0.5
If it is second, it takes 3.5 seconds to obtain the image output of uncompressed data of A4 facsimile size.

On the other hand, instead of such uncompressed data, M
Considering that the image data that has undergone the H-code compression processing is recorded, since the information amount is compressed by about 1/4 to 1/8, most image data files should be stored in 1 to 2 clusters. Becomes Therefore, the read operation from the disc itself is done in about 0.5 to 1 second, but after that, MH
It is necessary to perform the decoding process, which may take 2-3 seconds.

Here, the image data can be searched using the icon recorded in the above-mentioned heading sector, but in many cases it is desired to search for the file while actually checking the contents. The image data files will be called one by one. Considering such a case, the playback display of one image data file is
If ~ 4 seconds is required, it takes too much time, which is very frustrating and poor in usability. In addition, the fact that the display is only partially made becomes a problem when confirming the image contents.

However, in order to maintain the quality as image data, it is inevitable to record uncompressed data or MH coded compressed data. (Hereinafter, image data such as uncompressed data or MH coded compressed data that guarantees a certain image quality is referred to as a regular image.)

Therefore, in this embodiment, in addition to these regular images, search image data (thinned image) created by performing information thinning processing from uncompressed data is held in the data file. There is. As shown in FIG. 23, the structure of one image data file is such that a thinned image 50 is arranged first, followed by a regular image 60 (uncompressed data or MH coded compressed data), and one data It is formed as a file. That is, on the directory, the data area in which the thinned image and the regular image are connected is formed as one data file, and is managed by one directory unit.

The data sizes of the thinned image 50 and the regular image 60 are shown in FIGS. 24 (a) and 24 (b). Thinning picture 50 is regular picture 6
For 0, the vertical and horizontal dots are thinned out to 1/3 (that is, 1/9 as the information amount), and are 576 horizontal dots and 700 vertical dots as shown by the solid line in FIG. The regular image 60 (uncompressed data) is shown in FIG.
As shown in (b), there are 1728 dots horizontally and 2100 dots vertically.

The thinned-out image 50 is generated by thinning out the regular image 60 as shown in FIG. Figure 25 (a)
Shows an example of a regular image 60, and FIG. 25B shows an example of a thinned image 50.
First, with respect to the vertical direction, lines marked with circles in FIG. 25A, that is, one line is selected from three lines,
The latter two lines are thinned out. The selected one line (horizontal direction) is ORed in units of 3 dots enclosed in parentheses. That is, as shown in FIG. 25C, if there is at least one "black" data within 3 dots, it is converted as 1 dot of "black" data. By performing the thinning compression processing in this way, a thinned image 50 as shown in FIG. 25B is generated.

Therefore, the information amount of this thinned-out image 50 is 1728 ×
2100/9 = 403200 dots, which is 50400 bytes. Therefore, 50400 / 2048≈24.6, and the recording of the thinned image 50 requires only 24.6 sectors. That is, the data can be stored in one cluster that can record 32 sectors.

The thinned-out image 50 for one cluster as described above,
For example, the following operation is executed in response to connecting the regular images 60 of 8 clusters or more (or 2 clusters or more in the case of MH code compressed data) to form one data file as shown in FIG. To be done.

In FIG. 24, the broken line frame indicates the dot size (640 dots in the horizontal direction, 400 dots in the vertical direction) of the display unit 13. The regular image 60 can display only a very small area on one screen, but the thinned image is displayed. The 50 can display more than half of the area on one screen, and it is sufficient to move the display area between two screens to check the entire area. Further, with regard to the thinned-out image 50, since the data is stored in one cluster, it takes no time to read it out, and since no decoding processing is required, it takes only about 0.5 seconds to display it.

Here, when a certain data file is accessed, the data of the thinned-out image 50 is read out first. Therefore, the thinned-out image 50 is set to be first displayed and output as a reproduction display operation. deep. Then, the image (thinned image) can be displayed immediately after the user specifies the reproduction file. Further, in the thinned-out image 50, since more than half the area of the image is displayed by one display, it is very easy to check the image image,
This is very useful when searching while checking images.

When the user decides to actually display the image in detail by looking at the display of the thinned image 50,
Subsequently, the regular image 60 recorded in the same data file is displayed. At this time, since the thinned-out image 50 and the regular image 60 are in the same data file, no directory search or access operation is required to switch and display the thinned-out image 50 to the regular image 60, which does not take time. Particularly, if the recording / reproducing apparatus reads the data of the regular image 60 from the disk and stores it in the buffer RAM 33 while the thinned image 50 is being displayed, the thinned image 50 can be stored.
Can be instantly switched to the regular image 60 for display.

It should be noted that one data file itself may be divided on the disk, and for example, the thinned image and the regular image, or the regular image may be recorded at physically discrete positions. In this case, The read access operation of the CA is as described above.
It is carried out promptly based on the T data (no directory search is required because it is within the same data file), there is no delay in reading time, and there is no problem in prompt display of thinned images or regular images as described above.

If the thinned image 50 alone is sufficient as the display content (display quality), the user does not have to display the regular image 60.

<9. Management Method of Image Data File> The image data file composed of the thinned image 50 and the regular image 60 is managed as follows. As described above, the data U-TOC sector and the category information (Category) in the header of the data sector, and the data U-
As the category information (Category) in each directory unit in the TOC directory sector,
"20h" to "2Fh" represent black and white dot data.

[2] as category information (Category)
The definition of "0h" to "2Fh" is shown in FIG. "20h"
Image data of various dot sizes as uncompressed codes are assigned to "27h" (note that the thinned image 50
Will also include data). “20h” has a dot size of (32 × 8 × 1) per line,
“H” indicates image data in which one line is (32 × 8 × 2) dots. Similarly, “22h” is (32 × 8 × 3) dots,
“23h” is (32 × 8 × 4) dots, “24h” is (32 × 8 × 5) dots, and “25h” is (32 × 8 × 4) dots.
6) dots, “26h” is (32 × 8 × 7) dots,
"27h" corresponds to image data of a dot size of 1 line, which is (32 × 8 × 8) dots.

Here, the thinned image 50 has 576 dots per line, category information (Category) = “21h” is 32 × 8 × 2 = 512 dots, and category information (Ca
tegory) = “22h” is 32 × 8 × 3 = 768 dots. Therefore, the category information (Ca
tegory) becomes "22h" (768-576 = 192)
192 dots are left over).

If one line has 768 dots,
This is 96 bytes. And the recording area is 1
Cluster = 32 sectors = 32 × 2048 bytes = 65536 bytes, which corresponds to 65536/96 = 682, that is, 682 lines. Therefore, the category information (Category) is "22
Even if the display method corresponding to “h” is used as it is, it is possible to cover most of the thinned image of 700 lines.

A4 facsimile size image data (1
For line 1728 dots, category information (Ca
tegory) becomes “26h”.

"28h" indicates image data which is MH code compressed. "29h" to "2Dh" are undefined.
“2Eh” and “2Fh” are codes as category information used only in directories, for example, “2Eh”
"h" indicates that the data file indicated by the directory unit is a data file constituted by the thinned image 50 and the regular image 60 as uncompressed data, and "2Fh" indicates by the directory unit. The data file shown is a thinned image 50
And a regular image 60 as MH coded data. In addition,
“2Eh” and “2Fh” may be defined so that they can be used other than the directory.

Now, assume that a certain data file (file A) is composed of a thinned image 50 and a regular image 60 as uncompressed data, as shown in FIG. The thinned image 50 is recorded in one cluster (CL ₁ ) from the cluster address 0132h, the regular image 60 is recorded in 8 clusters (CL _{2 to} CL ₉ ) from the cluster address 0133h, and this data file is 9 clusters. Is assumed to be the data length of.

Since each sector in the cluster CL ₁ has a thinned-out image 50 recorded in that sector, the category information (Category) in the header is “22h”, which means that it is the thinned-out image 50. Are identified. In addition, in each sector in the clusters CL _{2 to} CL ₉ , uncompressed data is recorded as a regular image 60 in that sector, so the category information (Category) in the header is “2.
6h ”, and it is identified that the image is a regular image based on uncompressed image data.

Then, as a 32-byte directory unit provided in the directory sector (see FIG. 18) corresponding to this data file (file A), a part thereof is as shown in FIG. 27 (a). Information is recorded.

That is, this data file is a thinned image 50.
Since it is formed by the regular image 60 as uncompressed data, the category information (Category) of the 12th byte of the directory unit is “2Eh”.
Since the data length is 9 clusters, the 13th and 14th bytes of the directory unit (Volume1-0, Volume
1-1) becomes "00h" and "09h". In addition, the 26th and 27th bytes (Cluster-
H, Cluster-L) is the first cluster address 013
As indicated by 2h, they are "01h" and "32h", respectively.

As shown in FIG. 28, it is assumed that a certain data file (file B) is composed of a thinned image 50 and a regular image 60 as MH coded compressed data. The thinned image 50 is recorded in, for example, one cluster (CL ₁₂ ) from the cluster address 0232h, and the regular image 60 is recorded in two clusters (CL ₁₂ , C from the cluster address 0233h).
It is recorded in L ₁₃ ), and this data file has a data length of 3 clusters.

Since the thinned image 50 is recorded in each sector in the cluster CL ₁₁ , the category information (Category) in the header is described as "22h". Further, in each sector in the clusters CL ₁₂ and CL ₁₃ , since the MH coded compressed data is recorded as the regular image 60 in that sector, the category information (Category) in the header is written as “28h”. Become.

Then, as a 32-byte directory unit provided in the directory sector (see FIG. 18) corresponding to this data file (file B), a part thereof is as shown in FIG. 28 (a). Information is recorded.

That is, this data file is a thinned image 50.
Since it is formed by the regular image 60 of the MH coded compressed data, the category information (Category) of the 12th byte of the directory unit is “2Fh”. Since the data length is 3 clusters, the 13th and 14th bytes of the directory unit (Volume1-0, Vo
lume1-1) becomes "00h" and "03h". In addition, the 26th and 27th bytes of the directory unit (Clus
ter-H, Cluster-L) is 0 which is the top cluster address
As indicated by 232h, "02h" and "32h" are set.

By managing the image data files in the directory unit as described above,
The data file in which the thinned image 50 and the regular image 60 are connected is managed as a data file of one unit and recorded / reproduced.

<10. Shift display and jump display of image data> By the way, the thinned image 50 having the above-described size
Since the normal image 60 and the regular image 60 cannot be displayed entirely on one screen, it is necessary to move the display area. Therefore, in this embodiment, the thinned image 50 or the regular image 6
When 0 is displayed on the display unit 13, U key 12 _U ,
By operating the D key 12 _D , L key 12 _L , and R key 12 _R , the display area can be moved vertically and horizontally.

First, while displaying the thinned image 50,
As can be seen from FIG. 24 (a), it is not necessary to move in the horizontal direction, but it is necessary to move in the vertical direction. Therefore,
A shift display in which the screen is gradually moved in the vertical direction and a jump display in which the screen is vertically moved by about one screen are executed.

For example, when the thinned image 50 is read from the disk 1 and stored in the buffer RAM 33, the buffer R
The data of the AM 33 is read from a predetermined address, supplied to the display controller 35, and displayed on the display unit 13. The data area of 640 × 400 dots, which is the dot size of the display unit 13, is displayed. Becomes

At the time of display, first, the origin (x, y) is set with respect to the thinned image 50 of 576 × 700 dots read in the buffer RAM 33, and the origin (x, y) is set.
To 640 dots in the x direction (horizontal) and 40 in the y direction (vertical)
Data of 0 dots will be supplied to the display unit 13. Initially, the origin (x, y) = (0, 0) is set, so that the image content of the area (hatched portion) surrounded by the broken line in FIG. 29A is displayed.

On the other hand, U key 12 _U or D key 1
The y value of the origin (x, y) is 0 to 30 depending on the _2D operation.
The buffer R is changed by a predetermined value between 0 and
The data area read from the AM 33 and supplied to the display unit 13 is changed as shown in FIGS. 29 (a), (b) and (c). That is, the screen is scrolled up and down.
This is the shift display operation in this embodiment.

On the other hand, for example, by operating the D key 12 _D from the state of FIG. 29 (a), the screen can be moved to the state of FIG. 29 (d) at once. That is, the jump display is made. Of course, an upward jump display is also made by the U key 12 _U. Further, for example, even from the state of FIG. 29 (b), it is possible to jump to the state of FIG. 29 (a) or FIG. 29 (d) at once. That is, this jump display operation is realized by largely changing the value of y at the origin (x, y).

Next, when the regular image 60 is displayed,
As can be seen from the regular image size in FIG. 24 (b), it is necessary to move the screen vertically and horizontally, and in the four directions, as in the thinned image 50, the screen is gradually moved and almost one screen is displayed. A jump display that moves about a minute is executed.

Also in the case of the regular image 60, when it is read from the disk 1, it is stored in the buffer RAM 33 and the buffer RA
The data is read from the predetermined address from M33, supplied to the display controller 35, and displayed on the display unit 13. Of course, only the data area of 640 × 400 dots, which is the dot size of the display unit 13, is displayed.

At the time of display, first, the origin (X, Y) is set with respect to the normal image 60 of 1728 × 2100 dots read into the buffer RAM 33, and the origin (X, Y) is set.
Data of 640 dots in the X direction (horizontal direction) and 400 dots in the Y direction (vertical direction) from Y) are supplied to the display unit 13.

Initially, the origin (X, Y) = (0, 0) is set, so that the image contents of the area surrounded by the broken line from the position (0 dot, 0 dot) in FIG. 30 are displayed. Then, the value of X at the origin (X, Y) is changed by a predetermined value from 0 to 1088 in accordance with the operation of the L key 12 _L or the R key 12 _R , and the value of the U key 12 _U or the D key 12 _D is changed. By changing the Y value of the origin (X, Y) by a predetermined value between 0 and 1700 according to the operation, the data area read from the buffer RAM 33 and supplied to the display unit 13 is changed, That is, the screen is scrolled vertically and horizontally to a desired position, and the entire area of the regular image 60 in FIG. 30 can be covered as a displayable area.

From a certain arbitrary display state, the U key 1
Jump display is performed so that one screen is moved up, down, left and right at a stroke in response to a predetermined operation of 2 _U , D key 12 _D , L key 12 _L and R key 12 _R.

For example, in FIG. 31, the origin (X, Y) =
From the display state of (500,500), press the R key 12
_When jump operation is performed with _R , X is added to the value of X at the origin (X, Y).
Predetermined value M _X for directional jump movement is added and X _JR
And the origin (X, Y) = (X _JR , 500).
That is, the display state is the display J _R jumped to the right. If a jump operation is performed with the D key 12 _D from the display state where the origin (X, Y) = (500, 500), the Y value at the origin (X, Y) is changed to the predetermined value M as the Y-direction jump movement. _Y is added to form Y _JD, and the origin (X,
Y) = (500, Y _JD ). That is, the display state becomes the display J _D which is jumped downward.

Further, for example, in FIG. 31, the origin (X, Y)
When a jump operation is performed with the L key 12 _L from the display state of = (1088,1700), the predetermined value M _X as the X-direction jump movement is subtracted from the X value at the origin (X, Y) to obtain X _JL . The origin (X, Y) = (X _JL , 1700)
It is said that That is, the display state is the display J _L jumped to the left. Also, the origin (X, Y) = (1088,
1700), when the jump operation is performed by the U key 12 _U , the predetermined value M _Y as the Y-direction jump movement is subtracted from the Y value of the origin (X, Y) to obtain Y _JU, and the origin ( X, Y) = (500, Y _JU ). That is, the display state becomes the display J _U which is jump-moved upward.

As described above, the shift movement and the jump movement executed in the thinned image 50 and the regular image 60 change the origin (x, y) or (X, Y) which is the starting point of the data reading from the buffer RAM 33. Therefore, it is possible to perform from any display position state in any direction on the image data. Detailed processing for shift display and jump display and an operation method for executing shift display and jump display by using the same operation key will be collectively described in the description of the image display operation processing.

<11. Boundary display during jump display of image data> By the way, when the jump display is executed, the displayed image content will be changed significantly. To remain, the jump width in the left-right direction is smaller than the horizontal size of one screen (640 dots), and the jump width in the vertical direction is smaller than the vertical size of one screen (400 dots). A portion where the display areas shown by broken lines in FIG. 31 overlap is an overlapping portion.

This makes it easy to recognize the connection between the screen after the jump movement and the screen before the movement. However, in some cases, it is difficult to see how much of the screen after the movement was displayed on the previous screen. For example, when there is a document in the image and the document is read, it is convenient to present the boundary with the previous screen in the screen after the jump movement.

Therefore, in the present embodiment, the boundary line with the previous screen is displayed when the jump movement is performed. Now
A display state BJ in which a regular image 60 of an image as shown in FIG. 32A is read and a data area surrounded by a broken line is displayed
It is supposed to be. The output of the display unit 13 at this time is as shown in FIG. Here, it is assumed that the display state J _R is set by jumping to the right. At this time, the display unit 1
The output of No. 3 is as shown in FIG. 32 (b), where the portion displayed in the right corner in the previous display state BJ appears in the left corner in the display state J _R in an overlapping manner. At this time, the boundary line K is displayed on the display as shown in FIG. 32C, and the break between the screens before and after the jump is made clear to the user.

Further, it is assumed that the display state as shown in FIG. 32C is jumped downward to the display state J _D. At this time, the output of the display unit 13 becomes as shown in FIG. 32 (d), where the portion displayed in the lower corner in the previous display state (J _R ) overlaps the upper corner in the display state J _D. Will appear. At this time, on the display, a boundary line K is displayed as shown in FIG. 32 (d) so that the user can recognize the breaks in the screen before and after the jump.

Similarly, when the thinned image 50 is displayed, a boundary line K is shown as shown in FIG. 29 (d) which is the display state after the jump. The display position of the boundary line K is the jump distance (M _X or M _Y ) and the number of display dots in the moving direction (64
0 or 400) is the origin (X or Y) after the jump
Can be obtained by adding to. It should be noted that the display for presenting the boundary is not limited to the boundary line, and an arrow or the like may be displayed.

<12. Image Display Operation Processing> Processing for image display (processing by the system controller 21 and the display controller 35) according to the operation of the operation keys 12 including the shift display and the jump display as described above will be described with reference to FIGS. They will be described in the following order. The data files read from the disc 1 are thinned images 50 and regular images 60.
It is assumed that the image data file is the image data file according to, and the description of the processing corresponding to the other character data files is omitted. -A- Image display processing according to operation -b- Processing for shift display and jump display

-A- Image Display Processing According to Operation FIG. 33 shows an image display processing operation corresponding to the operation keys 12. When the recording / reproducing apparatus is turned on, various initial settings are made and the cursor is displayed. The display position is set to "1" (F201). Then, the file names of the data files recorded on the disc 1 are read out from the directory unit corresponding to each data file and displayed on the display unit 13 as a menu. That is, names (Name0 to Name7) and / or extensions (Suffix0) from each directory unit.
~ Suffix2) is read (F202). At this time, the cursor is displayed corresponding to the first file name on the menu.

Here, S key 12 _S , U key 12 _U , L
The operation of the key 12 _L is monitored (F203, F204, F205). When the U key 12 _U or L key 12 _L is operated, move the cursor up or down on the menu accordingly (F206, F207, F
208, F209). That is, the cursor is moved to select the data file.

When the user presses the S key 12 _S with the cursor positioned at the desired file name, the system controller 2 determines that the data file is selected.
1 reads the data file from the disk 1 and loads it into the buffer RAM 33 (F203 → F210). The data file reading operation is as described in FIG.

First, the origin (x, y) = (0, 0) for displaying the thinned image 50 is set (F211), and when the data file is read into the buffer RAM 33 (at least the thinned image 50 is displayed). When the data of one cluster at the beginning is read), data (640 × 400 dots) for one screen is displayed on the display unit 1 from the origin (x, y) = (0, 0).
3, and the thinned image 50 is displayed (F212). And
The operation of the H key 12 _H , RS key 12 _RS , U key 12 _U , D key 12 _D , M key 12 _M is monitored (F213, F214, F
215, F216, F217).

When the H key 12 _H which is the operation key for returning the menu is operated, the display returns to the menu display (F213 →
F202). The U key 12 _U is operated when shifting the screen upward or jumping upward. Therefore, a key input diagnosis process is performed to determine the shift / jump operation (F215 → F218). Also D
The key 12 _D is operated when shifting the screen downward or jumping downward. Therefore, a key input diagnostic process is performed to determine the shift / jump operation (F216 → F219).

When the thinned image 50 is displayed, U is used as an operation key for upward shift movement / upper jump movement.
The key 12 _U is also used, and the D key 12 _D is also used as an operation key for downward shift movement / downward jump movement. Further, as will be described later, when the regular image 60 is displayed, the U key 12 _U and the D key 12 _D are used in combination, and the R key 12 _{R is used} as an operation key for right shift movement / right jump movement. Is also used, and the L key 12 _L is also used as an operation key for left shift movement / left jump movement.

Since such operation keys are also used,
Steps F218, F219 (and F229, F230, F231, F23 described later)
In step 2), the key input diagnosis process is executed,
The operation is identified according to the key pressing time, and the shift movement or the jump movement is executed. The key input diagnosis process will be described later. When the key input diagnosis process is performed in step F218 or F219, the process returns to step F212 and H is again displayed at that time (by the new origin (X, Y)).
Key 12 _H , RS key 12 _RS , U key 12 _U , L key 1
Operation of 2 _L , M key 12 _M is monitored (F213, F214, F21
5, F216, F217).

When the RS key 12 _RS is pressed, the screen moving state by the shift movement or the jump movement is returned to the initial screen display state. That is, the process returns from step F214 to F211, resets to the origin (x, y) = (0, 0), and returns to the display state described with reference to FIG.

When the M key is pressed to switch the display of the thinned image 50 and the regular image 60, the process proceeds from step F217 to F220 in order to display the thinned image 50, and the origin (X, Y) = (0,0). Then, the data of the regular image 60 held in the buffer RAM 33 (in most cases, the regular image data recorded after the second cluster of the data file is also stored in the buffer R).
In the case where the reading to the AM 33 has been completed), the data (640) for one screen from the origin (X, Y) = (0, 0)
(× 400 dots) is supplied to the display unit 13 to display the regular image 60 (F221).

Then, the H key 12 _H , the RS key 12 _RS ,
U key 12 _U , D key 12 _D , R key 12 _R , L key 1
Operation of 2 _L , M key 12 _M is monitored (F222, F223, F22
4, F225, F226, F227, F228). When the H key 12 _H, which is the operation key for returning the menu, is operated, the display returns to the menu display (F222 → F202).

The U key 12 _U is operated when shifting the screen upward or jumping upward. For this reason, a key input diagnosis process for determining the shift / jump operation is performed (F224 → F229).
Further, the D key 12 _D is operated when shifting the screen downward or jumping downward. For this reason, a key input diagnosis process for determining the shift / jump operation is performed (F225 → F230).

The R key 12 _R is operated when shifting the screen to the right or jumping to the right. Therefore, the key input diagnostic process for determining the shift / jump operation is performed. Perform (F226 → F231). Also L
The key 12 _L is operated when shifting the screen to the left or jumping to the left. Therefore, the key input diagnostic process for determining the shift / jump operation is performed (F227). → F232).

When the key input diagnostic processing is performed in any of steps F229, F230, F231 and F232, the process returns to step F221 and the key input is monitored again in the display state (at the new origin (X, Y)) at that time. Is done.

When the RS key 12 _RS is pressed, the screen moving state by the shift movement or the jump movement is returned to the initial screen display state. That is, the process returns from step F223 to F220, the origin (X, Y) = (0, 0) is reset, and the display state (display of the upper left corner area of the image) at the beginning of the normal image display is returned.

When the M key 12 _M is pressed, the step for switching the display of the regular image 60 to the display of the thinned image 50 is performed.
Proceed from F228 to F211 and set the origin (x, y) for thinning image display =
It is set to (0, 0) and the thinned image display is performed as described above.

Through the above processing, the thinned image 50 and the regular image 60 are switched and displayed as desired by the user in response to the reading of one data file.

-B- Processing for shift display and jump display By the way, in the shift movement operation and the jump movement operation, since the operation keys are used in common as described above, F218, F219, F22
In each step of 9, F230, F231, F232, the processing of FIG. 34 is executed as the key input diagnosis processing, and the operation is identified according to the key pressing time.

First, when a key input is made and a key input diagnosis process is first performed, the process proceeds from step F301 to F302,
There is no previous key input. (Here, there is a previous key input means that the loop returning to step F301 has been executed in this processing loop.) Step F303
Then, the diagnostic counter that indicates the key pressing time is reset to zero. Then, the process returns to step F301, and if the button is still pressed, the process proceeds to step F302. At this time, there is a previous key input (after the diagnostic counter has already been reset in step F303), and the process advances to step F304 to check the value of the diagnostic counter.

If the diagnostic counter has not reached the predetermined value n, the value of the diagnostic counter is incremented (F305). That is, the time counting operation by the diagnostic counter is executed. The predetermined value n is a threshold value for identifying whether the operation is a shift movement operation or a jump movement operation.

If the key is continuously pressed to some extent,
The value of the diagnostic counter is incremented each time the process proceeds to step F305, and the value of the diagnostic counter = n at some point.
Then, the process proceeds to step F306, and the shift display process is executed.

In this shift display processing, the value of y of the origin (x, y) (in the case of F218 and F219 when the thinned image 50 is displayed),
Or, the value of X or Y of the origin (X, Y) (regular image 6
In the case of F229, F230, F231, and F232 when 0 is displayed), the process is changed. When operating the U key 12 _U (step in FIG. 33)
FIG. 35 shows the detailed steps of the shift display processing, taking the shift display processing in the key input diagnosis processing in F218 or F229) as an example. The process in step F229 is shown in parentheses.

The constant m for shift movement is, for example, m = 1 to 1
It is set to about 8. Then, first, a constant m is subtracted from the value of y or Y to obtain a new value of y or Y. That is, the calculation of y = ym or Y = Ym is performed.
(F401). When the new value of y or Y, which is the subtraction result, becomes a negative value, the new value of y or Y is set to 0 (F402, F403). For example, if m = 1, the origin is shifted upward by one dot.

When the D key 12 _D is operated (shift display process in the key input diagnosis process in step F219 or F230 of FIG. 33), a process of adding a constant m to the value of y or Y, that is, y = y + m Or Y = Y + m is performed, and if the new value of y or Y becomes larger than 1700 (2100-400 = 1700), the value of y or Y is forced to be 1700.
It is said that

When the R key 12 _R is operated (shift display process in the key input diagnosis process in step F231 of FIG. 33), a process of adding a constant m to the X value, that is, X = X
+ M is performed, and if the new value of X becomes larger than 1088 (1728-640 = 1700), the value of X is forced to 1
It is set to 088.

When the L key 12 _L is operated (shift display process in the key input diagnosis process in step F232 of FIG. 33), a process of subtracting the constant m from the X value, that is, X =
X-m is performed, and if the new value of X becomes smaller than 0, the value of X is forced to 0.

In this way, the origin (x, y) of the display area
When (or the origin (X, Y)) is changed, FIG.
In step F307, the image data is read from the new origin. That is, the display is shifted vertically or horizontally by m dots. Therefore, for example, if the operation of the U key 12 _U in step F215 of FIG. 33 is continuously executed, the process in step F219 causes the image to scroll upward while the key operation is performed. Will be shifted to. D key 12 _D , R
The same applies to the case of the key 12 _R and L key 12 _L , and while the key is being pressed, the image is scrolled downward, to the right, and to the left according to the operation key.

When the continuous key operation for shift display is completed, the process proceeds from step F301 to F308. In this case, since the value of the diagnostic counter is n, the processing loop is exited and steps F218 or F219 to F212 in FIG.
Return to. Or steps F229, F230, F231, F232 to F2
Will return to 21. Therefore, the display state is fixed at the time when the shift operation is completed.

On the other hand, if the key operation is for a short time (for example, within 1 second) and is ended before the value of the diagnostic counter reaches n, the process proceeds from step F301 to F308, and further proceeds to F309 to jump. Display processing will be performed. This jump display processing is performed by using the y value of the origin (x, y) (in the case of F218, F219 when the thinned image 50 is displayed), or the X or Y value of the origin (X, Y) (regular image 60). (When F229, F230, F231, F232 when is displayed) is changed to a relatively large value.

When the U key 12 _U is operated (step in FIG. 33)
FIG. 36 shows the detailed steps of the jump display processing, taking the jump display processing in the key input diagnosis processing in F218 or F229) as an example. The process in step F229 is shown in parentheses.

As a constant M for jump movement,
The jump constant M _{X in the} X direction is, for example, about 300 to 600, and the jump constant M _{Y in the} Y direction is, for example, 180 to 350.
It is set to a degree.

When operating the U key 12 _U , first y or Y
The constant M _Y is subtracted from the value of to obtain a new value of y or Y. That performing the calculation of y = y-M _Y or _{Y = Y-M Y (F501} ). If the new value of y or Y that is the subtraction result is a negative value, the new value of y or Y
Is forced to 0 (F502, F503).

Then, as described above, in order to display the boundary line K on the screen after the jump movement, the boundary line position is calculated and the display is set (F504). When this processing is completed, the key input diagnosis processing of FIG. 34 is completed, and the process returns from step F218 to F212 of FIG. Or from step F229
Return to F221. Then, in step F212 or F221,
The display is performed with a new origin (x, y) or (X, Y). For example, if M _Y = 180, the origin is 1
The display jumped up by 80 dots is displayed.

When the D key 12 _D is operated (jump display process in the key input diagnosis process in step F219 or F230 of FIG. 33), a process of adding a constant M _Y to the value of y or Y, that is, y = y + M _Y or Y = Y + M _Y is performed, and if the new value of y or Y becomes larger than 1700 (2100−400 = 1700), the value of y or Y is forced to 1
It is set to 700. When the border line display setting is performed, the process returns to step F212 or F221 and a new origin (x,
The display of the state of jumping downward by y) or (X, Y) is performed.

When the R key 12 _R is operated (jump display process in the key input diagnosis process in step F231 of FIG. 33), a process of adding a constant M _X to the X value, that is, X =
X + M _X is performed, and if the new value of X becomes larger than 1088 (1728−640 = 1700), the value of X is forced to 1088. When the border line display setting is performed, the process returns to step F212 or F221 and a new origin (x,
The display of the state jumped to the right by y) or (X, Y) is performed.

When the L key 12 _L is operated (jump display process in the key input diagnosis process in step F232 of FIG. 33), a process of subtracting the constant M _X from the X value, that is, X
= X-M _X is performed, and if the new value of X becomes smaller than 0, the value of X is forcibly set to 0. When the boundary line display setting is performed, the process returns to step F212 or F221, and the state of jumping to the left by the new origin (x, y) or (X, Y) is displayed.

As described above, when one data file is read according to the user's key operation, the thinned image 50 and the regular image 60 are displayed, and the shift movement and the jump movement are performed at the time of displaying each image. Done. The operation keys can be commonly used for the shift movement and the jump movement.

The constants m, M _X , and M _{Y for} shift movement and jump movement may be set by the user. Further, the constants at the time of shift movement are the same values in the horizontal direction and the vertical direction, but m _X and m _Y may be different values. Furthermore, the constants M _X and M _Y at the time of jump movement may be M _X = M _Y.

Although not described in the flowchart of FIG. 37, a thinning-out image 50 for a certain data file is displayed.
Alternatively, it is possible to switch the display output of different data files (for example, the output of the data file before or after on the menu screen) while the image of the regular image 60 is being output.

<13. Image Display Operation Process Performing Frame Display as Other Embodiment> By the way, in the above-described embodiment, the current display is performed while the display area is shifted or jumped when the regular image 60 is displayed. It may happen that the output does not know which part of the entire image it is displaying. There are also cases where it is desired to see only a certain part in detail while grasping the image of the entire image. Furthermore, when returning to the display of the thinned image 50 from the state where a certain position is displayed in the regular image 60 to check the entire image and returning to the regular image 60 again, Since it is difficult to understand in what direction and to what extent should the shift or jump be performed in order to move the display to the position that was seen in step 6,
It may take some time to find the part you want to see on 0.

In consideration of these circumstances, the display position in the regular image 60 can be confirmed by displaying a frame in the thinned image 50, and the frame display can be moved in the thinned image 50. Further, when the display is switched again from the thinned image 50 to the regular image 60, the data range of the regular image in the portion corresponding to the frame in the thinned image 50 at that time may be displayed. An embodiment for realizing this will be described below.

FIG. 37 is a flow chart of image display processing in this embodiment, and FIGS. 38 and 39 are explanatory views for displaying a frame on a thinned image. 37, steps F601 to F632
The process up to is the step of FIG. 33 in the above-described embodiment.
Since the processing is the same as that of F201 to F232, detailed description will be omitted. That is, when the user moves the cursor on the menu and selects a data file, the data file is read from the disk 1 and the thinned image 50 is displayed first, and the M key 12 _M is operated to switch to the regular image 60. It is displayed and displayed.

However, in this embodiment, the processing when the regular image is once displayed and then the M key 12 _M is pressed again to return to the display of the thinned image 50 is different. That is, in FIG. 37, if a positive result is obtained in step F628, the process does not return to step F611 (that is, normal thinned-out image display), but the process proceeds to step F633 to perform thinned-out image display with a frame display. Become.

It is assumed that a data file is specified on the menu screen, the data file is read from the disk, and the thinning-out image 50 is displayed as shown in FIG. 38 (a) (F611-). F619). Note that, in FIG. 38, the broken line is the display range on the display unit 13. At this time, the actual display on the display unit 13 is as shown in FIG. Also, in the processing of F611 to F619, M key 12 _M
Is operated, the regular image 60 as shown in FIG.
Data is used for display (F620 to F632). When the regular image 60 is displayed, the user performs a shift movement operation or a jump movement operation to set the display state such that the origin (X, Y) = (810, 510) as shown in FIG. 38 (b), for example. Suppose The display on the display unit 13 is as shown in FIG. 39 (b).

At this time, the user may press the M key 12 _M in order to confirm the whole image or confirm which part on the image the currently displayed part is.
Operation of the M key 12 _M causes the process to proceed from step F628 to step F633.

Here, the origin (x _W , y _W ) of the frame is calculated in order to display the frame in the thinned image 50. The frame is the thinned image 50 at a position corresponding to the display portion of the regular image 60 up to that point.
Since the regular image 60 is data obtained by thinning out the data of the thinned image 50 by 1/3 in the vertical and horizontal directions, the origin (X, X,
For Y), X / 3 and Y / 3 may be calculated. That is, the origin (x _W , y _W ) of the frame is calculated as (X / 3, Y / 3) (F633). In addition, the frame is the display area (640 ×
Since it corresponds to 400 dots), the dot size of the frame is, for example, approximately 1/3 × 1/3 21
It is set to 3 × 133 dots.

Then, the processing proceeds to step F639 and the thinned-out image 50 is displayed.
Will be displayed, but at this time, the origin (x _W , y
A frame having a size in the range of 213 × 133 dots from _W ) is displayed so as to be superimposed on the image.

Therefore, for example, when the M key 12 _M is operated from the origin (X, Y) = (810, 510) as shown in FIG. 38 (b), the thinned image 50 is displayed as shown in FIG. 38 (c). The origin of the frame is (x _W , y _W ) = (270, 170). Then, on the display unit 13, as shown in FIG. 39C, the frame W is superimposed and displayed on the image.

At this time, the origin (x,
For the setting of y), the description of the process is omitted in FIG. 37. However, if the vertical size of the frame is 133 dots, the displayable vertical dot size is 400, and therefore 400−133 = 267. Thus, for example, when y _W, which is the Y coordinate value at the origin of the frame, is 250 or less, the origin (x, y) of the thinned image 50 is (0, 0), and y _W is 251 or more and 450 or less. When the origin (x, y) = (0, 20
0), when y _W is 451 or more, the origin (x, y) =
It may be set such as (0,300). Alternatively, the value of y may be calculated from the value of y _W so that the frame W is located at the substantially central position in the vertical direction.

By displaying the frame W as shown in FIG. 39 (c), the position seen by the regular image 60 can be confirmed.

When the processing for displaying the thinned image 50 with the frame W is started, the U key 12 _U , D key 12 _D , R key 12
_R , L key 12 _L , RS key 12 _RS , M key 12 _M , H
Operation of key 12 _H is monitored (F635, F636, F637, F638, F
639, F640, F641).

Here, the U key 12 _U , D key 12 _D , R
When either the key 12 _R or the L key 12 _L is pressed, the frame W displayed on the screen of the thinned image 50 is moved. As for the movement of the frame W, the shift movement and the jump movement are possible, and the operation keys for these movements are also used.

When the U key 12 _U is operated, the frame W is shifted upward or jumped upward.
For this reason, the key input diagnosis process for determining the shift / jump operation is performed (F635 → F642). Also D key 1
When 2 _D is operated, the frame W is shifted downward or jumped downward. For this reason, the key input diagnosis process for determining the shift / jump operation is performed (F636 → F643).

When the R key 12 _R is operated, the frame W is shifted to the right or jumped to the right.
Therefore, a key input diagnostic process is performed to determine the shift / jump operation (F637 → F644). When the L key 12 _L is operated, the frame W is shifted to the left or jumped to the left. Therefore, a key input diagnostic process is performed to determine the shift / jump operation (F638 → F6
45).

Steps F642, F643, F644, F645 key input diagnosis processing is almost the same as the processing for shifting / jumping the screen display area described above, and if it is a short-time (for example, within 1 second) operation, it is almost the same. The origin (x _W , y _W ) of the new frame W is calculated so that the jump movement is performed in the area of one frame, and if the operation is continued for 1 second or more, the frame is scrolled while the pressing operation is continued. The origin (x _W , y _W ) of the frame is changed so that the shift movement is performed.

If the size of the frame W is 213 × 133 dots, the constant n _W for the new origin calculation is, for example, about 1 to 8 in the case of shift movement.
As the constant N _W for jump movement, the constant N _{WX in the} X direction is about 150 to 200, and the constant N _{WX in the} Y direction is 9.
It may be about 0 to 120.

Then, at the time of shift movement, the following calculation is performed to calculate the coordinates of the new frame W. When the U key 12 _U operation _{·· y W = y W -n W} ( but y _W <0
If so, y _W = 0) When the D key 12 _{D is} operated ... y _W = y _W + n _W (however, y _W > 56
If it becomes 7, y _W = 567) R key 12 _R operation ... x _W = x _W + n _W (however x _W > 44
If it becomes 3, y _W = 443) When operating the L key 12 _L ... x _W = x _W- n _W (however, x _W <0
Then x _W = 0)

Further, the following calculation is performed at the time of jump movement. U key 12 _U operation during _{·· y W = y W -N WY} ( but y _W <0
If so, y _W = 0) When D key 12 _{D is} operated ... y _W = y _W + N _WY (however, y _W > 56
If it becomes 7, y _W = 567) R key 12 When operating _R ... x _W = x _W + N _WX (however x _W > 44
If it becomes 3, y _W = 443) When operating the L key 12 _L ... x _W = x _W- N _WX (however, x _W <0
Then x _W = 0)

After such key input diagnosis processing, the process returns to step F634, and the origin of the frame at that time (x _W , y _W )
The key input is monitored while the frame W is displayed.

[0285] Actually, the frame W may disappear from the screen unless the display area of the thinned image 50 is moved along with the movement of the frame W. The origin (x, y) for display in the drawing 50 will also be changed. For example, as described above, y that is the Y coordinate value at the origin of the new frame due to the shift or jump
_{When W} is 250 or less, the origin (x,
y) = (0,0), when y _W is 251 or more and 450 or less, the origin (x, y) = (0,200), y _W is 451
When it is above, the origin (x, y) = (0, 300) is set, or the value of y is calculated from the value of y _W so that the frame W is always located at the substantially vertical center position. It is also possible to do so.

By these processes, for example, FIG. 38 (d)
The frame W (and the display area of the thinned image 50) is moved on the display of the thinned image 50 as in (e) and (f). FIG. 38 (d)
FIGS. 39 (d) (e) (f) show actual display images of the display unit 13 in the states (e) (f).

If the RS key 12 _RS is pressed while the thinned image 50 with the frame W is displayed, the origin position of the frame W is returned to the origin position of the thinned image 50. Origin of frame (x _W ,
y _W ) = (0,0) (F639 → F646), step F63
Return to 4. Therefore, the display state is as shown in FIG.
As shown in (e). When the H key 12 _H, which is the operation key for returning the menu, is operated, the display returns to the menu display (F641 → F602).

When the M key 12 _M is pressed, the display of the thinned image 50 with the frame W is switched to the display of the regular image 60. At this time, the origin (X, Y) for displaying the regular image 60 is displayed. ) Is calculated from the origin (x _W , y _W ) of the frame at that time. That is, X = 3x _W and Y = 3y _W (F640 → F6
47). Then, in step F621, the regular image 60 is displayed based on the calculated origin (X, Y). That is, in this embodiment, the frame W is moved while checking the whole image on the thinned image 50, and the regular image 60 is called at a desired position, so that the display call of the image portion desired to be viewed in detail can be easily performed. It can be done quickly.

<14. Modified Example of Frame Display> As a modified example of the embodiment in which the frame W is displayed on the display of the thinned image 50 in this way, a regular image 60 is displayed on the screen of the display unit 13 as shown in FIG. At the same time, the thinned image 50 is displayed, the frame W is displayed on the thinned image 50 corresponding to the display range of the regular image 60, and the frame W is displayed in accordance with the shift movement or the jump movement of the regular image 60. May be moved.

By doing so, it is possible to always check at a glance which position on the image the display position of the regular image 60 corresponds to, which is very convenient. In this case, the regular image 60 is displayed on the screen by the amount used for displaying the thinned image 50.
However, since the entire image of the image can be confirmed in the thinned image 50, there is no problem. Further, the frame W is displayed to show the display position of the regular image 60, but instead of the frame W, for example, an arrow or the like indicating the origin position may be displayed.

<15. Digest File Creation Process in Each Example> By the way, as described above, the thinned image 50 and the regular image 60 are combined and generated as an image data file so that the image contents can be easily confirmed and operated. For some data, only the thinned image 50 is sufficient, and the regular image 60, which is a detailed image, is not necessary so much.

However, even for such image data, if the thinned image 50 and the regular image 60 are combined to generate a data file, a region of at least 2 clusters is required for recording (for example, 1 If a thinned image 50 is recorded in a cluster, a regular image 60 as MH coded compressed data in one cluster, and in particular, a regular image 60 as uncompressed data, 8-9 clusters are recorded in the case of the dot size of the above example. Is needed. If only the thinned image 50 is sufficient, the recording area used for the regular image 60 becomes a useless area on the disc 1. Therefore, for such image data, it is preferable to create a data file of only the thinned image 50 and record it on the disc 1.

For this reason, in each of the above-described embodiments, the thinned-out images 50 are extracted from a plurality of data files and are integrated so that one data file can be created. For example, as shown in FIG. 42 (a), each thinned image 50 of a, b, c ... Then, as shown in FIG. 42B, the image data of the regular image size (1728 × 2100 dots) is integrated to construct the image data. The data file 70 (digest file) created in this way is registered and recorded as one data file on the disc 1, and the data file from which the thinned image 50 is extracted is deleted. Significant savings in the recordable user area).

For example, the thinned image 50 is one cluster, and the regular image 6
The thinned image 50 is extracted from each data file of 9 units, which is composed of 8 clusters of which 0 is 7 clusters, and a digest file 70 is created as shown in FIG. 42. The digest file 70 is used as uncompressed data for 8 clusters. It is assumed that the data is recorded in the area of, and that each data file of 9 units is deleted. Then, the recording area required for this 9-unit image is changed from 81 clusters to 9 clusters, which can be reduced to 1/9. Further, the digest file 70 is further subjected to MH code compression processing and recorded.
If it fits in one or two clusters, it is possible to reduce the required recording area to about 1/81.

FIG. 41 shows the process of creating such a digest file 70. First, a keyword is set to identify the data file from which the thinned image 50 is extracted.
(F701). The keyword is the name or extension (Name0 to Name7, Suff
The user inputs so that the desired data file is selected by ix0 to Suffix2). Of course, a plurality of keywords may be used, and AND conditions or OR conditions of a plurality of keywords may be set.

Next, N _D = 1 and M _D = 0 are set as control variables (F702). The variable N _D is a variable for sequentially reading the directory units, and the variable M _D is a variable for creating one digest file 70 with the thinned image 50 of 9 units.

First, the variable N for the directory sector
Read from the first directory unit according to _D (F703). Then, it is confirmed whether the keyword exists in the read directory unit (F704). If there is no keyword, it is not the data file for which the digest file 70 is created, so the variable N _D is incremented.
(F709), if there is another data file, proceed to read the next directory unit (F710 → F703).

If the directory unit corresponds to the keyword, the data file is accessed from the directory unit, the thinned image 50 is read and stored in the buffer RAM 13 (F705). Then, the variable M _D is incremented (F706). If the variable M _D has not reached 9, the variable N _D is incremented (F707 → F7
09) If there are other data files, move on to the reading of the next directory unit (F710 → F703). If there is a directory unit corresponding to the keyword, the data file is accessed to read the thinned image 50 and store it in the buffer RAM 13 (F705).

When the variable M _D = 9 in step F707, it means that the data as one digest file is gathered in the buffer RAM 33 by the thinning-out image 50 of 9 units as shown in FIG. 42 (b). . Therefore, this data is uncompressed or MH code-compressed and written to the disc 1 as the digest file 70 (F708). At this time, the variable M _D is reset to 0. Then, the variable N _D is incremented (F707 → F709), and if there is another data file, the process proceeds to read the next directory unit (F710 → F703).

Whether the variable M _D reaches 9 or not,
If it is determined in step F710 that the variable N _D exceeds the number of data files, it means that the directory units for all data files have been collated.
It will proceed to step F711.

If the variable M _D = 0 at this time, the thinning image 50 to be used as the digest file is the buffer RAM.
Since there is no one in 33, step F7
Proceed to step 13 and create by then disc 1 at step F708
Each of the one or a plurality of digest files 70 recorded in 1. is registered in the directory so as to be managed as one data file. That is, one directory unit is created for each digest file 70.

On the other hand, if the variable M _D ≠ 0 in step F711, it means that 1 to 8 thinned-out images 50 that have not been converted into digest files remain in the buffer RAM 33. Disk 1 as a digest file 70 by compression or MH code compression.
Record in (F712). Then, in step F713, directory registration is performed for the one or more digest files 70 recorded in the disc 1 in step F708 and the digest file 70 recorded in step F712.

With the above processing, the digest file 7
0 is created. For example, if there are 14 data files corresponding to the keyword, two unit digest files 70 ₁ and 70 ₂ are created and recorded as shown in FIG.

[0304] It is also possible to remove any thinned-out image among the thinned-out images fetched as corresponding to the keyword from the digest file by performing an edit operation immediately before recording. . For example, at the time of executing steps F708 and F712, a user's execution operation or edit operation may be accepted, and the operation may be performed in response to this.

When registering each digest file 70 in the directory, category information (Category) for discriminating the digest file is given. For example, the category code "2Dh" which is not defined in FIG. ] Is defined as the code for the digest file, and this can be used.

After the digest file 70 is created and recorded as described above, if the user deletes the data file including the thinned image 50 included in the digest file 70, the recording area on the disc is greatly saved. You will be able to The deletion (erasure) of the data file is as described in FIG. 22, and the directory and CAT in the data U-TOC are rewritten and the area in which the data file is recorded is reset as a recordable area. It is done by

By the way, when reproducing such a digest file 70, the whole is displayed as a regular image from the beginning (that is, one thinned image is displayed as a part of the regular image), and shift movement or jump is performed. By moving, another thinned image may be displayed, or the image may be switched for each thinned image by using, for example, the M key 12M.

<16. Application of the Present Invention> In each of the embodiments, the image is output by the display unit 13. However, of course, by using the display unit in the external device connected through the connector unit 15, the thinned-out image 50 and the regular image are similarly obtained. 60 and the thinned image 50 as the digest file 70 may be displayed.

Further, although the disk device is the recording / reproducing device in the embodiment, it may be realized as a reproducing device for performing similar display output or a recording device for performing similar digest file recording operation. If the dot size of one screen on the display unit 13 or the display unit of another device is different, or if the dot size of the regular image is different, the
The jump movement constant (movement amount M), the size of the thinned image, and the like may be changed.

Further, as the disk device of the present invention which can be used for data recording / reproducing, the input / output means (data display means, data communication means, image scanner means, key input means) shown in FIGS. The data-font conversion means does not necessarily have to have all of these, and may have only a part thereof depending on the application. Further, other data input / output means may be added.

[0311]

As described above, the present invention is generated by thinning and compressing original (first) image data and, for example, information from original image data in one image data file. By including the search image data (second image data) so that the original image data is arranged following the search image data in the data file, the search image data is obtained. Since the amount of information is small and the image size is also small, reading from the disk and displaying it is completed in a very short time, and by looking at this, the entire image of the image can be easily grasped. At the same time, it is possible to immediately determine whether the image recorded in the data file is the desired image.

Further, if the user views the second image data and wants to see the image in detail, the first image data may be displayed. At this time, the first and second image data are the same data. Since the file exists in the file, the playback access operation is not necessary, and quick display is possible.

When the dot size of the image data is larger than the displayable size, it is possible to move a large range of, for example, about one screen from an arbitrary position on the image data ( By jumping), the entire image can be checked quickly.

Further, if both the jump movement and the shift movement are used together, for example, the entire image can be roughly viewed by the jump movement, or the display position can be finely adjusted by the shift movement so that the target portion can be easily seen. It becomes possible to further improve usability. Here, the jump movement and the shift movement are used as the operation keys by distinguishing the operation contents by, for example, the pressing time of the operation keys, so that the number of keys is not increased and the operability is not impaired.

Further, by displaying the frame for presenting the display range on the display of the second image data, the display portion can be moved by jump movement or shift movement on the display of the first image data. It is possible to easily confirm the current display position even if the display is moved. At this time, if the frame display is moved on the display of the second image data, and the first image data is displayed based on the position of the display of the frame or the like, the desired display position can be obtained. The first image data can be easily displayed with.

If the jump movement is to be changed to a display range moved within a range smaller than one screen, that is, if the screen is jumped vertically or horizontally with some overlap area, the jump movement is performed. By the display showing the boundary between the area displayed before the change and the newly displayed area on the changed screen, the continuity before and after the display switching can be easily grasped.

From the above, a digital image data output device having operability, usability, and ease of image confirmation (search) can be realized.

[Brief description of drawings]

FIG. 1 is an external view of a disc and a recording / reproducing device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a recording / reproducing apparatus of an embodiment.

FIG. 3 is an explanatory diagram of P-TOC information in the example.

FIG. 4 is an explanatory diagram of U-TOC information in the example.

FIG. 5 is an explanatory diagram of a link structure of U-TOC information in the example.

FIG. 6 is an explanatory diagram of an area management state on a disc according to the embodiment.

FIG. 7 is an explanatory diagram of a track structure of a disc of an example.

FIG. 8 is an explanatory diagram of a data sector according to the embodiment.

FIG. 9 is an explanatory diagram of a data sector mode 0 according to the embodiment.

FIG. 10 is an explanatory diagram of a data sector mode 1 according to the embodiment.

FIG. 11 is an explanatory diagram of a data sector mode 2 according to the embodiment.

FIG. 12 is an explanatory diagram of a structure of a cluster of data U-TOC in the example.

FIG. 13 is a CAT0 of data U-TOC in the embodiment.
It is an explanatory view of a sector.

FIG. 14 is a CAT1 of data U-TOC in the embodiment.
It is an explanatory view of a sector.

FIG. 15 is a CAT2 of data U-TOC in the example.
It is an explanatory view of a sector.

FIG. 16 is an explanatory diagram of a CAT unit of data U-TOC in the embodiment.

FIG. 17 is an explanatory diagram of word definition of a CAT unit in the disc of the embodiment.

FIG. 18 is an explanatory diagram of a directory sector of data U-TOC in the example.

FIG. 19 is an explanatory diagram of a directory hierarchical structure in the data U-TOC of the embodiment.

FIG. 20 is an explanatory diagram of a heading sector of data U-TOC in an example.

FIG. 21 is an explanatory diagram of a heading sector of data U-TOC in the example.

FIG. 22 is a flowchart of operation processing for a disc of the recording / reproducing apparatus of the embodiment.

FIG. 23 is an explanatory diagram of a data file structure of image data according to the embodiment.

FIG. 24 is an explanatory diagram of thinned images and regular images in a data file of image data according to the embodiment.

FIG. 25 is an explanatory diagram of a thinning image generation method in image data according to the embodiment.

FIG. 26 is an explanatory diagram of category information about image data in the example.

FIG. 27 is an explanatory diagram of management and structure of an image data file according to the embodiment.

FIG. 28 is an explanatory diagram of management and structure of an image data file in the example.

FIG. 29 is an explanatory diagram of a shift display and a jump display for a thinned image in the example.

FIG. 30 is an explanatory diagram of shift display with respect to a regular image in the example.

FIG. 31 is an explanatory diagram of jump display for a regular image in the example.

FIG. 32 is an explanatory diagram of a boundary line presentation state during jump display in the example.

FIG. 33 is a flowchart of image display processing according to the embodiment.

FIG. 34 is a flowchart of a key input diagnosis process of the embodiment.

FIG. 35 is a flowchart for explaining a shift display process of the embodiment.

FIG. 36 is a flowchart for explaining a jump display process according to the embodiment.

FIG. 37 is a flowchart of an image display process of another embodiment.

FIG. 38 is an explanatory diagram of a frame display operation in another example.

FIG. 39 is an explanatory diagram of a display state at the time of frame display operation in another example.

FIG. 40 is an explanatory diagram of a modified example of the frame display operation in another example.

FIG. 41 is a flowchart of digest file creation processing in each embodiment.

FIG. 42 is an explanatory diagram of digest file creation processing in each embodiment.

FIG. 43 is an explanatory diagram of digest file creation processing in each embodiment.

FIG. 44 is an explanatory diagram of a relationship between dot image data in a facsimile and a display range of a display.

[Explanation of symbols]

1 disc 10 recording / reproducing device 11 disc insertion portion 12 key input portion (operation key) 12 _U up movement key (U key) 12 _D down movement key (D key) 12 _L left direction movement key (L key) 12 _R right direction Move key (R key) 12 _M Mag key (M key) 12 _H Home key (H key) 12 _S Target select key (S key) 12 _RS Reset key (RS key) 13 Display section 14 Image scanner section 15 Input / output connector section 21 System Controller 23 Optical Head 28 Decoder 30 Encoder 32 Conversion Memory 33 Buffer RAM 34 Communication Circuit 35 Display Controller 50 Thinning Image 60 Regular Image 70, 70 ₁ , 70 ₂ Digest File K Border Line W Frame

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04N 5/93

Claims (4)

[Claims] 1. A certain image data is generated from image data for search by compressing the amount of information from this image data, and image data generated by performing a predetermined process on the image data or the image data. With respect to the first image data as described above, a data file in which the search image data is connected to the front side in the data file as the second image data to form a data file of one unit,
The display state is read out from the recording medium and can be output to the display unit, and the display state is changed when the first image data is displayed and when the second image data is displayed. A digital image data output device, characterized in that it can be changed from an arbitrary display range in image data to a display range moved by about one screen on the display means. 2. A certain image data is generated by generating a search image data by compressing the information amount from the image data, and the image data or the image data generated by performing a predetermined process on the image data. With respect to the first image data as described above, a data file in which the search image data is connected to the front side in the data file as the second image data to form a data file of one unit,
It is constructed so that it can be read out from the recording medium and output to the display means for display, and the display state can be changed when displaying the first image data and when displaying the second image data. The display range can be changed from an arbitrary display range in the image data to a display range moved by a large range of about one screen on the display means, and the display state can be changed from the arbitrary display range in the image data to a small range. The digital image is characterized in that it can be changed to a display range shifted by a range, and that the operation of the large range and the movement of the small range are combined so that the operation keys are used in the same direction. Data output device. 3. Image data for a certain image data is generated by compressing the amount of information from the image data to generate search image data, and is generated by performing a predetermined process on the image data or the image data. With respect to the first image data as described above, a data file in which the search image data is connected to the front side in the data file as the second image data to form a data file of one unit,
It is constructed so that it can be read out from the recording medium and output to the display means, and when the first image data is displayed, the display range can be moved to an arbitrary position. A digital image data output device, wherein a display for presenting a display range is configured to appear on the display of the second image data. 4. A certain image data is generated from image data for search by compressing the amount of information from this image data, and image data generated by performing a predetermined process on the image data or the image data. With respect to the first image data as described above, a data file in which the search image data is connected to the front side in the data file as the second image data to form a data file of one unit,
The display state is read out from the recording medium and can be output to the display unit, and the display state is changed when the first image data is displayed and when the second image data is displayed. It is possible to change from an arbitrary display range in the image data to a display range that is moved within a range smaller than one screen on the display means, and on the changed screen, the area displayed before the change is displayed. A digital image data output device, characterized in that a display for presenting a boundary of a newly displayed area is provided.