JPH11308558A - Data reproducing device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve retrieval by substantially increasing the number of displayed frames in the case of conducting high speed reproduction. SOLUTION: The device 1 is provided with a data storage means 2 consisting of a recording medium that stores image data and is accessed nonlinearly and a data reproducing means 3 that reads the image data from the data storage means 2, stores the read image data to a memory 6 once and applies reproduction processing to the image data stored in the memory 6. The data reproducing means 3 uses two different fields from the image data by two frames stored in the memory 6 to generate image data by one frame in the case of reproduction in the high speed reproduction mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data reproducing apparatus and method, and more particularly to a data reproducing apparatus and method suitably used for an AV server system of a broadcasting station or the like.

[0002]

2. Description of the Related Art An AV server system for storing, reproducing, editing, and distributing AV (audio video) data includes:
A data storage device such as a hard disk array for storing AV data, a plurality of AV data input / output interfaces (hereinafter referred to as channels) for inputting / outputting AV data from / to this data storage device, and a system controller for controlling the entire system And so on. Each channel includes a memory or the like for performing timing adjustment when outputting AV data from the data storage device or when inputting AV data to the data storage device.

[0003] In the AV server system,
The system controller controls each of these channels so as to use them in a time-sharing manner at regular intervals, thereby realizing simultaneous and parallel processing with multiple channels. Such AV
In the server system, the allocation time (hereinafter, referred to as a time slot) allocated to each channel is periodic and fixed. This time slot is as short as possible because it is necessary to secure a length that allows data necessary for normal speed reproduction to be read into the memory of each channel and to shorten the waiting time of each channel. Generally, it is set to the length.

[0004] An AV server system used for business such as a broadcasting station is required to have good responsiveness at the start of reproduction of AV data. Also, at the time of editing the AV data, variable speed reproduction such as high speed reproduction and reverse reproduction is performed. Therefore, when accelerating from normal reproduction to high speed reproduction, when decelerating from high speed reproduction to normal reproduction, forward reproduction is performed. Good responsiveness and operability at the time of changing the direction to reverse playback are required. Specifically, when the execution command of the variable-speed reproduction is transmitted, it is required to promptly shift to a smooth reproduction that is faithful to the designated speed / direction and has no dropped frames.

[0005]

By the way, the conventional AV
In a server system, during high-speed reproduction, data is generally decimated and output in units of frames (hereinafter, this reproduction method is referred to as “frame culling method”). For example, in the time required for the image of 30 frames to advance at the normal 1 × speed, the image for 60 frames advances at the 2 × speed reproduction. At this time, in the double speed reproduction by the above-described frame thinning method, a total of 30 frames are output every other frame, for example, in the manner of frame 1, frame 3, frame 5,.

When high-speed reproduction is performed by the frame thinning method, the reproduced image is easy to see because it is completed for each frame. On the other hand, information is discarded in units of frames. No frame "
Will occur.

FIG. 8 shows output data at the time of double speed reproduction using the frame thinning method. As is apparent from FIG. 8, in the reproducing method using the conventional frame thinning method, for example, at the time of double speed reproduction, for example, frame 1, frame 3, frame 5, frame 7,.
It can be seen that data is thinned out every other frame in units of frames, and data is output at one-frame intervals. For this reason, for example, when searching for an image at the moment when the flash is fired by editing, and when the image exists in a frame that is not output (decimated) such as frame 2 or frame 4, Since an image is not displayed on a monitor or the like, it is very difficult to search at double speed reproduction. That is, according to the frame thinning method, the probability that an image existing only in one frame is displayed on a monitor or the like is １ ／, so that there is a problem that work efficiency in editing or the like is low.

FIG. 9 shows output data at the time of quadruple speed reproduction using the frame thinning method. As is apparent from FIG. 9, in the reproducing method using the conventional frame thinning method, at the time of quadruple speed reproduction, for example, frame 1, frame 5, frame 9,. By repeating the process of outputting (3) and not outputting (thinning out) data for three frames, data for one frame is output every four frames. For this reason, when searching for an image at the moment when the above-mentioned flash is fired during editing,
If the image is frame 2, 3, 4 or frame 6,
In the case where there is a frame such as 7, which is not output (thinned out), this image is not displayed on a monitor or the like, so that it is very difficult to search at 4 × speed reproduction. That is, in this case, since the probability that the image is displayed on a monitor or the like is 1/4, there is a problem that work efficiency in editing or the like is low.

As described above, when an image is edited by high-speed reproduction in the conventional AV server system, when searching for an image that is instantaneously recorded in only one frame, the image is displayed on the monitor. There is a problem that is not displayed on the screen. Therefore, in the AV server system, it is required to reduce the number of frames discarded at the time of high-speed reproduction, that is, the number of invisible frames, in order to improve the editing efficiency.

[0010] The present invention has been proposed in view of such circumstances, and when performing high-speed reproduction, the number of frames to be displayed is substantially increased, thereby realizing improved data searchability. It is an object to provide a reproducing apparatus and a method.

[0011]

In order to solve the above-mentioned problems, a data reproducing apparatus according to the present invention comprises a data storage means comprising a non-linearly accessible recording medium in which image data is stored; Data reproducing means for temporarily storing the read image data in a memory, and performing a reproducing process on the image data stored in the memory. For data, one frame image is generated from two frames of image data using two different fields.

In the data reproducing apparatus, during the reproducing process in the high-speed reproducing mode, the data reproducing means generates one frame image from two frames of image data using two different fields for the image data stored in the memory. As a result, the number of frames to be decimated is substantially reduced.

According to another aspect of the present invention, there is provided a data reproducing apparatus, comprising: a data storage unit comprising a non-linearly accessible recording medium in which image data is stored;
A plurality of data reproducing means for reading image data from the data storage means, temporarily storing the read image data in a memory, and performing reproduction processing on the image data stored in the memory; Control means for allocating slots and controlling each data reproducing means so as to read image data from the data accumulating means at the timing of each time slot and store the read image data in a memory, wherein the control means comprises one data set for performing high-speed reproduction. A plurality of time slots are assigned to the reproducing means, image data is read out using the plurality of time slots, and one data reproducing means is controlled so as to temporarily store the read image data in a memory. The image data stored in the memory is two frames of image data. 1 using two different field
A reproduction process for generating a frame image is performed.

In the data reproducing apparatus, a plurality of time slots are assigned from a control signal to one data reproducing means for performing high-speed reproduction, and the one data reproducing means uses the assigned plural time slots. By reading out the image data, storing the read out image data once, and generating one frame image from the stored image data using two different fields from the image data of two frames, the number of frames to be thinned is substantially reduced. Decrease.

In order to solve the above-mentioned problems, a data reproducing method according to the present invention reads image data from a non-linearly accessible recording medium in which image data is stored, temporarily stores the read image data, and stores the read image data. In a data reproducing method for performing a reproducing process, at the time of a reproducing process in a high-speed reproducing mode, the image data once stored is different from the image data for two frames by two.
An image of one frame is generated using the field.

In the data reproducing method, during the reproducing process in the high-speed reproducing mode, the image data once stored is thinned out by generating one frame image from two frames of image data using two different fields. The number of frames to be cut is substantially reduced.

In order to solve the above-mentioned problems, a data reproducing method according to the present invention comprises:
In a data reproducing method for reading out the above image data from its non-linearly accessible recording medium storing image data using its own time slot, temporarily storing the read out image data, and performing a reproducing process on the stored image data, a high speed reproduction is performed. A plurality of time slots are assigned to one data reproducing unit to be performed, and the one data reproducing unit reads out image data using the assigned plural time slots, temporarily stores the read image data, and stores the stored image data. For data, one frame image is generated from two frames of image data using two different fields.

In the data reproducing method, a plurality of time slots are allocated to one data reproducing means for performing high-speed reproduction, and the one data reproducing means reads out image data using the plurality of allocated time slots. By temporarily storing the read image data and generating an image of one frame from the stored image data using two different fields from the image data of two frames, the number of frames to be thinned is substantially reduced.

[0019]

Embodiments of the present invention will be described in detail with reference to the drawings. An AV server system 1 shown in FIG. 1 to which the present invention is applied performs storage, reproduction, editing, distribution, and the like of AV (audio video) data. A disk device 2 on which AV data is stored, and the disk device 2 2 and a plurality of AV data input / output interfaces 3 (3a, 3b) for inputting / outputting AV data.
.. 3n) and a system controller 4 for controlling the entire system.

The disk device 2 is a RAID (Redundant Arrays) in which a plurality of hard disk drives (HDDs) are arranged.
This is a so-called multi-channel type of Inexpensive Disks, which allows reading or writing of AV data to and from a predetermined area of each hard disk independently and simultaneously for each channel. In this embodiment, various AV data are stored in a predetermined area of the hard disk in a file format.

The AV data input / output interface 3 comprises a processor 5 and a memory 6 as shown in FIG. Here, the processor 5 accesses a predetermined area of each hard disk of the disk device 2 based on the time slot allocated by the system controller 4. Also, the processor 5
By controlling storage / read of data to / from the memory 6 based on a time slot assigned by the system controller 4, when AV data is output from the disk device 2,
The timing at the time of inputting V data is adjusted. As shown in FIG. 2, the memory 6 has three banks (Bank #
A, Bank # B, Bank # C). Hereinafter, for convenience of explanation, each of the AV data input / output interfaces 3a, 3b,..., 3n is referred to as a channel (ch) 1, a channel 2,.

In the AV server system 1, since the recording or reproduction of AV data can be simultaneously performed on n channels by n channels, the time during which the system controller 4 can access the disk device 2 for each channel. (Time slots) are allocated by time division. Specifically, as shown in FIG. 2, the system controller 4 sets one period as a fixed period,
The period of the cycle is divided into n equal parts, and each divided period is assigned to channel 1
To time slot n. Therefore, a time slot is assigned to one channel in one cycle period every n times, which is 1 / n of one cycle.

Here, the length of the time slot allocated to one channel is determined by the amount of AV data that can be reproduced during one cycle (hereinafter referred to as one time slot cycle) until the next time slot comes. From the disk device 2 to one bank of the memory 6 of the channel. For example, when considering the channel 1, when the time slot of the channel 1 comes, data of one time slot period is stored in the bank B, and at the same time as the time slot of the channel 2, the data stored in the bank B is obtained. To play. Then, as shown in FIG. 2, when the time slot of the channel 1 in the next cycle comes, the data is stored in the bank A, and the data reproduction of the bank B is continued until the storage is completed. . When the time slot of channel 2 is reached, the reproduction of the data in bank B ends, and at the same time, the data stored in bank A is reproduced.

By performing such processing, in the AV server system 1, any one of the memories 6 of the AV server system 1 until a time slot of its own (hereinafter referred to as its own time slot) comes in each channel. Since the AV data is continuously output from the bank, the reproduction can be continued without interruption.

On the other hand, when recording the input data, the AV data is stored in any one of the banks of the memory 6 during one time slot cycle by the reverse process, and the time when the own time slot comes And collectively writes the data to the disk device 2. Therefore, the length of one time slot period is set so that the required amount of AV data for normal speed reproduction can be read and stored in one bank of the memory 6, and the time is as short as possible. Is done.

The system controller 4 controls the processor 5 of each channel based on an input / output control signal supplied from an external block. This input / output control signal includes
Commands such as data recording, reproduction, stop, high-speed reproduction, and reverse reproduction for each channel, and additional information on reproduction magnification and the like during high-speed reproduction are included.

Under the control of the system controller 4, the processor 5 of each channel performs recording / reproduction of AV data as follows. When recording the data, the processor 5 converts the AV data supplied from the external block into a data format to be recorded on the hard disk of the disk device 2, performs a compression process if necessary, and then performs a post-processing process. Data is sequentially stored in each bank of the memory 6, and when the own time slot comes, the data is transmitted to the disk device 2 for recording. As the compression processing, for example, the MPEG method using the correlation between frames, the DV method which is intra-frame compression, and the like can be considered. Of course, the input data may be recorded without compression without compression.

On the other hand, when reproducing the recorded data, the processor 5 reads the data for one time slot period from the disk device 2 at the time when the own time slot comes, and stores the data in one of the banks of the memory 6. When the next own time slot arrives, the data is subjected to decompression processing as necessary, further converted to AV data format and output to an external block, and, as described above, the disk device 2 sends the data to the external block. Data for the time slot period is read and stored in another bank of the memory 6.

Further, the system controller 4 in the AV server system 1 is used when any one of the channels shifts to a high-speed reproduction mode such as double speed or quadruple speed based on the supplied input / output control signal. An empty channel is detected, and a time slot for the empty channel is assigned to a channel for high-speed reproduction. Specifically, the system controller 4 allocates N time slots to the channel when any of the channels performs high-speed reproduction at N times speed.

By performing such control, in the AV server system 1, it is possible to read a continuous area on the hard disk from the disk device 2, so that the shortage of reading caused by accessing a discrete area is achieved. Occurrence is eliminated, and smooth reproduction without dropping frames according to the specified speed becomes possible.

For example, consider the case where double speed reproduction is performed on channel 1, and the system controller 4
Detect free channels that are not being used,
As shown in FIGS. 3 and 4, the time slot for channel 5, which is a free channel, is assigned as the time slot for channel 1. This allows channel 1 to:
Data of two time slots together with the own time slot is read from the disk device 2 and stored in two banks of the memory 6, and when output from each bank, a field unit according to a reproduction magnification (in this case, double speed) , And one frame of image is generated from two frames of data using two different fields, thereby realizing smooth image reproduction at a specified speed.

Specifically, the processor 5 of the channel 1
Decimates the second field of the n-th frame and the first field of the (n + 1) -th frame with respect to the data stored in the memory 6, and combines the first field of the n-th frame with the second field of the (n + 1) -th frame. Is repeated as one frame image.

FIG. 5 shows data output when performing the double speed reproduction. Here, in FIG.
In the case where the reproducing method of the present invention is applied to (a),
(B) shows a case where the above-described frame thinning method is applied, respectively.

When the frame thinning method is used, at the time of double speed reproduction, for example, frame 1, frame 3, frame 5, frame 7,.
Since data is thinned out every other frame in units of frames and data is output at one-frame intervals, as described above, the probability that an image instantaneously recorded in only one frame is displayed on a monitor or the like is one. / 2.

On the other hand, the AV server system 1
According to the above, as shown in FIG. 5A, when performing double-speed playback, for example, an image in which the first field of the frame 1 and the second field of the frame 2 are combined, and the first field of the frame 3 and the frame Thus, images for all frames are output, such as an image obtained by combining the second field of the frame 4 and the image obtained by combining the first field of the frame 5 and the second field of the frame 6, and so on. Therefore, according to the AV server system 1, when editing is performed, when searching for an image instantaneously recorded in one frame, such as at the moment when the flash is fired, the image is Even if it exists in the frame, since this image is displayed on a monitor or the like, the search becomes very easy in terms of time and labor, and the efficiency of editing work is greatly improved.

FIG. 6 shows output data when quadruple speed reproduction is performed. Here, in FIG. 6, (a)
The case where the reproducing method of the present invention is applied to (b), the case where the above-described frame thinning method is applied to (b)
Each is shown.

In the conventional reproducing method, at the time of quadruple speed reproduction, for example, frame 1, frame 5, frame 9,.
In such a manner, by repeating the process of outputting data of one frame in units of frames and not outputting (thinning out) data of three frames, data of one frame is output every four frames. As described above, the probability that an image instantaneously recorded in only one frame is displayed on a monitor or the like is 1/4.

On the other hand, the AV server system 1
6A, when quadruple-speed playback is performed, for example, an image obtained by combining the first field of frame 1 and the second field of frame 2 and the first field and frame of frame 5 6, an image obtained by synthesizing the second field of the frame 9, an image obtained by synthesizing the first field of the frame 9 and the second field of the frame 10, and so on. . Therefore, according to the AV server system 1, when editing, when searching for an image instantaneously recorded in one frame, such as at the moment when the flash is fired, the image is displayed on a monitor or the like. Since the display probability is high (in this case, the probability is 1/2), the search efficiency is greatly improved.

The output data at the time of performing the quadruple speed reproduction is not limited to the above example. For example, an image obtained by combining the first field of the frame 1 and the second field of the frame 3 and the first field of the frame 5 , An image obtained by combining the first field of frame 1 and the second field of frame 4, and an image obtained by combining the first field of frame 1 and the second field of frame 4. Processing such as an image obtained by combining one field and the second field of the frame 8 may be performed. However, as for frames to be combined, generally, the farther apart the frame is, the larger the difference between the frames becomes, and it becomes hard to see when displayed on a monitor or the like. Fields of different frames are combined.

Next, an example of control when high-speed reproduction is performed in the AV server system 1 using the editing device 10 as an external block shown in FIG. 1 will be described with reference to the flowchart in FIG. Note that the editing device 10
An arbitrary channel is selected, a signal is transmitted / received to / from the processor 5 and the system controller 4 of the selected channel, and AV data supplied from the selected channel is displayed.

In step S 1, the processor 5 of any one of the channels receives an open command for opening a predetermined file from the editing device 10. The open command is a command for acquiring an access right to a predetermined file. This is for prohibiting or permitting access to a file to be opened when, for example, the content of the file is currently being recorded and its contents are constantly changing.

In the next step S2, the processor 5 of the channel that has received the open command issues a command for obtaining information on which area of the disk device 2 the file is stored in the system controller 4.
Emit against.

The system controller 4 determines in step S3
Then, the processor 5 is notified of the area of the disk device 2 where the file is stored. In step S4, the processor 5 having received the notification transmits a permission command to the editing device 10 indicating that a reproduction command may be issued. That is, a permission notification for the above-described open command is transmitted. With this permission command, access to the file specified by the open command (either one file or a plurality of files) is permitted.

The editing apparatus 10 receiving this permission command,
In the following step S5, a command specifying the speed (magnification) for reproducing the file is transmitted to the processor 5. This command is received by the system controller 4 via the processor 5.

In step S6, the system controller 4 which has received the reproduction speed designation command detects a vacant time slot and assigns it to the channel to be used. As a result, a plurality of time slots are assigned to the channel in one cycle. Specifically, in step S6, the system controller 4 allocates N time slots to the channel in one cycle when performing N-times speed reproduction as described above.

In the next step S7, the processor 5 of the relevant channel sets the time according to the assigned time slot.
The AV data of the file is read from the storage area of the disk device 2 notified in step S3, and the data is stored in a predetermined bank of the memory 6. Then, when the data has been stored in one bank, the processor 5 of the relevant channel reproduces the data and outputs it to the editing device 10 in the subsequent step S8. At this time, the processor 5
Decimates the data stored in the memory 6 in units of fields in accordance with the reproduction magnification, synthesizes two different fields from the data of two frames to generate an image of one frame, and sends this to the editing device 10. Output to
That is, when the playback speed of the file is 2 ×, the processor 5 thins out the second field of the n-th frame and the first field of the (n + 1) -th frame as described above,
The process of combining the first field of the n-th frame and the second field of the (n + 1) -th frame and outputting it as an image of one frame to the editing apparatus 10 is repeated. 4
In the case of double-speed playback or double-speed playback at a higher speed, the same process is repeated to combine different fields from data for two frames and output one frame.

Thus, as described with reference to FIG. 5 and FIG.
, The search efficiency in editing work is greatly improved.

As described above, according to the AV server system 1, the system controller 4 allocates a plurality of time slots to one channel for performing high-speed reproduction at N times speed, so that the one channel is transmitted from the disk device 2. When the amount of data that can be read increases and the reproduction process is performed at high speed reproduction, it is possible to read and process a continuous area from the hard disk of the disk device 2. Further, in the one channel, when outputting the read data, thinning is performed in units of fields according to the reproduction magnification, and two different fields are synthesized from the data of two frames and output as an image of one frame. The number of frames displayed on a monitor or the like increases to a substantial number, and when searching for an object recorded instantaneously in several frames, an image of an object crossing at a high speed, etc., the work efficiency Is greatly improved.

In this embodiment, the disk drive 2
Is configured using an HDD, but the present invention is not limited to this, and any recording medium capable of non-linear access (random access) may be used. Therefore,
The disk device 2 is, for example, a DVD (Digital Video Dis
k) or an optical disk such as an MO (Magneto-Optical disk), a magneto-optical disk, or the like.

In this embodiment, the number of divisions in one cycle of a time slot is the same as the number of channels.
The present invention is not limited to this, and a so-called spare time slot may be provided by dividing the number of timeslots in one cycle into more than the number of channels.
As a result, even when all the channels are used, a spare time slot can be further allocated to a channel for performing high-speed reproduction, so that the operability of the entire system can be improved.

[0051]

As described above in detail, according to the data reproducing apparatus and method according to the present invention, when the recorded data is reproduced at high speed, the data reproducing means operates the image stored in the memory. By generating one frame image using two different fields from two frames of image data, the number of frames to be thinned is substantially reduced, and the number of frames to be displayed is substantially increased. Since it becomes possible, searchability is improved.

Further, according to the data reproducing apparatus and method of the present invention, a plurality of time slots are allocated from a control signal to one data reproducing means for performing high-speed reproduction.
The one data reproducing unit reads out the image data using the assigned plurality of time slots, temporarily stores the read out image data, and uses two fields different from the image data for two frames for the stored image data. By generating an image of one frame, the number of frames to be thinned is substantially reduced and the number of frames to be displayed can be substantially increased. In an AV server system or the like, searchability is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an AV server system to which the present invention has been applied.

FIG. 2 is a diagram showing a configuration of a memory of each AV data input / output interface.

FIG. 3 is a diagram for explaining a case where high-speed reproduction is performed on channel 1;

FIG. 4 is a diagram for explaining a case where high-speed reproduction is performed on channel 1;

FIG. 5 is a diagram for explaining data output when double-speed playback is performed in the AV server system.

FIG. 6 is a diagram for explaining data output when quadruple-speed playback is performed in the AV server system.

FIG. 7 is a flowchart illustrating an example of control when performing high-speed playback using an editing device.

FIG. 8 is a diagram for explaining data output when double-speed playback is performed by thinning out frames.

FIG. 9 is a diagram for explaining data output when performing quadruple speed reproduction by thinning out frames.

[Explanation of symbols]

1 AV server system, 2 disk units, 3 (3
a, 3b... 3n) AV data input / output interface, 4 system controller, 5 processor, 6
memory

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H04N 5/937 (72) Inventor Satoshi Yoneya 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Invention Person Masakazu Yoshimoto 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo, Japan Sony Corporation (72) Inventor Jun Junkawa 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Aburaya Satoshi 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sonny Corporation (72) Inventor Koichi Sato 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sonny Corporation (72) Inventor Tomohisa Shiga Tokyo (72) Inventor Masaki Hirose 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (12)

[Claims] 1. A data storage means comprising a non-linearly accessible recording medium storing image data, reading image data from the data storage means, temporarily storing the read image data in a memory, and storing an image stored in the memory. A data reproducing unit for performing a reproducing process on the data, wherein the data reproducing unit performs a reproduction process on the image data stored in the memory during the reproduction process in the high-speed reproduction mode.
A data reproducing apparatus for generating an image of one frame using two different fields from image data of a frame. 2. The image reproducing apparatus according to claim 1, wherein the data reproducing unit performs a reproducing process in a high-speed reproducing mode with respect to the image data stored in the memory, the first field of n frames and (n + 1)
2. The data reproducing apparatus according to claim 1, wherein an image of one frame is generated by combining the second field of the frame and the second field of the frame. 3. A data storage means comprising a non-linearly accessible recording medium storing image data, reading image data from the data storage means, temporarily storing the read image data in a memory, and storing the image in the memory. A plurality of data reproducing means for performing a reproducing process on data, and time slots of a fixed period are assigned to each of the data reproducing means, and image data is read from the data storage means at the timing of each time slot and stored in the memory. Control means for controlling each data reproduction means as described above, wherein the control means allocates a plurality of time slots for one data reproduction means for performing high-speed reproduction, reads image data using the plurality of time slots, The above-mentioned one is to store the read image data in the memory once. Controlling the data reproducing unit, wherein the one data reproducing unit performs a reproduction process of generating one frame image using two different fields from the two frame image data for the image data stored in the memory. Characteristic data playback device. 4. The reproduction device according to claim 1, wherein the one data reproduction unit combines the first field of the n-th frame and the second field of the (n + 1) -th frame with respect to the image data stored in the memory to generate an image of one frame. 4. The data reproducing apparatus according to claim 3, wherein the data reproducing apparatus performs processing. 5. The data reproducing apparatus according to claim 3, wherein said control means allocates N time slots to one data reproducing means for performing high-speed reproduction at N times speed. 6. The control means detects a use state of each data reproducing means, and allocates a time slot for an unused data reproducing means to one data reproducing means for performing high-speed reproduction. The data reproducing device according to claim 3, wherein 7. A data reproducing method for reading out image data from a recording medium in which the image data is stored and accessible in a non-linear manner, temporarily storing the read out image data, and performing a reproducing process on the stored image data. A data reproducing method comprising: generating one frame image using two different fields from two frames of image data once stored in the image data during processing. 8. A reproducing process in a high-speed reproducing mode,
8. The data reproducing method according to claim 7, wherein the stored image data is combined with a first field of n frames and a second field of (n + 1) frames to generate an image of one frame. 9. A plurality of data reproducing means to which respective own time slots of a fixed period are respectively assigned, read out the image data from the non-linearly accessible recording medium storing the image data using the own time slot, and read out the read image data. In a data reproducing method for temporarily storing data and performing a reproducing process on the stored image data, a plurality of time slots are assigned to one data reproducing unit for performing high-speed reproduction. Reading image data using a plurality of time slots, temporarily storing the read image data, and generating one frame image from the stored image data using two different fields from two frames of image data. Characteristic data reproduction method. 10. A data reproducing means for performing high-speed reproduction generates a one-frame image by combining the stored image data with a first field of n frames and a second field of (n + 1) frames. 10. The data reproducing method according to claim 9, wherein: 11. The data reproducing method according to claim 9, wherein N time slots are assigned to one data reproducing means for performing high-speed reproduction at N times speed. 12. The data according to claim 9, wherein a use state of each data reproducing means is detected, and a time slot of another data reproducing means not used is allocated to said one data reproducing means. Playback method.