JPH05128810A - Animation output system - Google Patents

Abstract

PURPOSE:To provide an animation output system which realizes a previewer function able to display a video without any break even when an animation cut recorded discontinuously in a storing medium is continuously displayed. CONSTITUTION:A control program 5, when a cut 1 and a cut 2 recorded in a storing medium 2 are displayed as continuous animation data, calculates the seek time to coded data 203 of the cut 1 and coded data 204 of the cut 2, omits the data reading for at least the seek time from the coded data 203 and obtains the seek time. The coded data 203, by reducing the picture quality at the frame away from one connecting part by a coding and decoding part 3, prevents the break of a video and a displaying part 4 reproduces as one animation datum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving picture editing system for editing digital moving picture data recorded in a storage medium such as a hard disk or an optical disk, and more particularly to a moving picture display system having a previewer function. ..

[0002]

2. Description of the Related Art In recent years, a moving image editing system for recording moving image data in a storage medium as digitized digital data has begun to appear, against the backdrop of the improvement of data processing capability due to the practical use of high-definition television and the advance of computer technology. ..
In such a method using digital data, a moving image is VT
Compared with an editing system that saves in the form of R tape or film, it becomes possible to randomly access an arbitrary frame and change the pixel value at an arbitrary position in the frame data in pixel units. For this reason, it is not necessary to actually cut the tape and connect it or re-record the combined screen to combine the characters and images, change the scenes, and the like, and the editing work can be easily performed.

Digital editing systems that take advantage of this advantage have already been commercialized. In a digital editing system,
An analog signal recorded on a VTR tape or the like is digitized and stored in a storage medium as digital data, several scenes (hereinafter referred to as moving picture cuts) are cut out from the stored moving picture data, and the reproduction order of each moving picture cut is arranged. Perform editing work such as changing and applying image effects of wipe and dissolve to the connection part of each video cut. In the digital editing system, the confirmation of editing work can be efficiently performed by the previewer function that makes the most of random accessibility. According to the previewer function, it is possible to display and confirm data at any time during the editing work without having to newly create data according to the work result. It is possible to easily perform the simulation reproduction of the work result by reading out the designated motion picture cuts in the reproduction order according to the work result or applying the image effect programmatically.

As described above, unlike the editing work when the VTR tape is directly used, the fast-forwarding and rewinding for reproducing the next moving picture cut does not occur at each joint of each moving picture cut, and the order of moving picture cutting is changed. It is possible to efficiently check the results of editing work such as. The final editing work result is output as editing and processing information, and based on this editing and processing information, the actual V
Editing is performed using the TR device. In fact, there is a standard established as an industry standard for editing / editing information. In addition to a dedicated system for automatically editing VTR tapes by reading this and controlling VTR equipment, it is possible to create editing / editing information. Editing subsystems that perform only work are also commercialized by many companies.

[0005]

However, as described above, in the method of simply reading out each moving picture cut in the reproduction order, there may be a problem even if random access is possible. For example, this is the case of moving image data having a relatively large amount of data per frame. Generally, in an editing system, the data read rate from a storage medium often becomes a bottleneck that limits the frame display speed.
Therefore, the readout rate of moving image data is often at the limit of the display speed. Further, there is also a system that improves the effective read rate and realizes a specified display speed on the assumption of physically continuous recording of data. In such a situation, when the simulation reproduction is performed according to the editing processing information, if the data between the movie cuts to be continuously reproduced is recorded physically separated, the head seek of the storage medium is performed to read the subsequent movie cuts. As a result, a time delay occurs, which causes a problem that the data is not read in time and the image is interrupted.

This conventional operation will be described below with reference to FIG. The time chart shown in FIG. 2 shows the data read time and display time in the conventional example. In FIG. 2, reference numeral 22 denotes a read time required to read the coded data of GOP1 forming the first half of cut 1 when reading cut 1 and cut 2 in order and displaying them as one logically continuous moving image data, 21 ACS is the access time of the storage medium 2 required to start reading the encoded data of GOP1. Similarly, 24 and 23 are the read time and access time of GOP2 of cut 1, and 26 and 25 are the read time and access time of GOP1 of cut 2. In addition, SE indicated by 27
EK is the storage medium 2 at the end of reading the GOP 2 of cut 1.
The seek time required to seek from the head position to the head position at the start of reading of GOP1 of cut 2 is shown. t0
~ T4 shows time on a time chart. Here, cut 1 has two frame groups (hereinafter, GOP: Gr
(abbreviated as oupOfPicture), GOP1 and GOP2. The GOP is composed of a plurality of consecutive frame groups, and the coded data of each cut in the coding / decoding unit is collected and read out from the storage medium in a unit of this GOP. The number of GOP frames is determined from the data read rate of the storage medium, the buffer size in the encoding / decoding unit, and the like.

In the conventional example, as shown in FIG.
Seek time 27 for reading OP2 and GOP1 of cut 2
Occurs, the read end time t4 of the encoded data of GOP1 of cut 2 is delayed by a seek time of 27 minutes.
That is, since the display start time t4 of GOP1 of cut 2 synchronized with this is also delayed, there arises a problem that the image is interrupted from the display end time t3 of cut 1 to the display start time t4 of cut 2.

As described above, in the conventional configuration, since the seek time by the head seek is required during the reproduction of the encoded data 203 and the encoded data 204, there is a problem that the image is interrupted. Then, as a method of coping with these problems, a method of limiting the number of colors or image size to suppress the number of bits per pixel or the number of pixels, or a method of increasing the compression coding rate to reduce the data amount at the expense of image quality Was taken. Many systems limit the use of the image size used by the previewer function to a reduced size of 1/2 or 1/4 the actual number of pixels. This is because when the moving image size is small or the number of bits per pixel is small, the data read rate from the storage medium can be afforded, and the time delay due to the head seek can be covered by prefetching and buffering.

In recent years, however, there has been an increasing demand for an editing system that can be operated in full color in an actual moving image size. Especially in video editing for post production and presentations, the demand for image quality becomes severe. In such applications, since the connection part of the video cut is often subjected to special processing such as compositing processing and image effects, the attention during playback of the simulation is higher than in other parts, and the previewer function can be used for video breaks. It will be a big obstacle.

For example, in order to obtain a sufficient data read rate to realize a full-color digital editing system of NTSC size which is a television standard, the data compression rate is increased to reduce the image quality, or the data is physically continuous. Without storage, it is difficult to achieve the performance of the current storage medium. However, if each movie cut is newly recorded continuously each time the editing work is performed, the advantage of being able to randomly access is lost, and the editing efficiency is reduced due to the waiting time for re-recording, which is not practical. In some editing systems, data is distributed to a plurality of storage media and a plurality of data channels are provided to improve a substantial transfer rate, but there is a drawback that the device scale becomes large. Also,
Considering the convenience of storing digitized data, it is desirable to avoid the data from being distributed to a plurality of storage media and to record the data individually on a portable medium such as an optical disk.

In view of the above problems, the present invention, when reproducing moving picture cuts discontinuously stored in a storage medium as one continuous moving picture data, delays data reading due to head seek at a connecting portion between moving picture cuts. Video interruption due to
An object of the present invention is to provide a moving image output system capable of preventing the interruption of the image at the connecting portion by omitting the reading of the data of the other frame portion apart from the connecting portion of the moving image cut.

[0012]

In order to solve the above problems, a moving image output system of the present invention includes a storage medium for recording and reading frame data of a moving image cut composed of a plurality of frames, and a storage medium for each frame data. A management program that creates a list of recording addresses and the number of frames in the medium, and a storage medium control unit that divides the frame data of the moving image cut specified by the management program into subframe data units of a certain amount or less and reads from the storage medium. And a display unit that displays the subframe data read by the storage medium control unit at fixed frame time intervals, and when the management program continuously displays a plurality of moving image cuts,
The seek time from the recording address of the frame data of the video cut to be displayed first in the storage medium to the recording address of the frame data of the video cut to be displayed next is calculated, and at least the seek time is read from the sub-frame data of the video cut to be displayed first. The configuration is such that seek is performed to the recording address of the frame data of the moving image cut to be displayed next, within a time when the reading of the frame data of the size that requires time is omitted.

[0013]

According to the present invention, when the management program continuously displays a plurality of moving picture cuts, the present invention has the moving picture cut frame data to be displayed next from the recording address of the moving picture cut frame data to be displayed first in the storage medium. The seek time to the recording address of is calculated, and the next video cut to be displayed within the time when the reading of the frame data of the size that requires at least this read time from the video cut sub-frame data to be displayed is omitted. By completing the seek to the record address of the frame data of, the delay of the frame data read due to the seek time that occurs when reading the frame data of the video cut to be displayed first and the frame data of the video cut to be displayed next It is possible to display video without interruption. .

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 3 is a time chart showing the relationship between data read time and display time, and FIG. 4 is an operation example of FIG. 1 and FIG. It is a flowchart shown. FIG. 5 is a time chart in another configuration of the present invention.

In FIG. 1, reference numeral 1 denotes a storage medium control unit for controlling recording / reading of encoded data to / from the storage medium 2, and the storage medium 2 also shows an example of data arrangement of the storage medium. Reference numeral 3 denotes a code decoding unit that buffers and decodes coded data from the storage medium 2, and 4 a display unit that displays the frame data decoded by the code decoding unit 3 at fixed frame display time intervals. Reference numeral 5 is a management program that operates on the host processor. The management program 5 manages each moving image cut information such as a recording address in the storage medium 2, and the storage medium control unit 1, the encoding / decoding unit 3, and the display unit 4.
Control the operation of. Furthermore, an application program that realizes functions such as moving image editing is installed as a part of the management program 5 or in the form of utilizing the management program 5.

In general, digital moving image data is recorded in the storage medium 2 as encoded data which has been compression-encoded to reduce the amount of data. The encoded data of the moving image cut recorded in the storage medium 2 is read by the storage medium control unit 1 into the encoding / decoding unit 3 according to an instruction from the management program 5, and then converted into frame data by the encoding / decoding unit 3. The data is decoded and displayed on the display unit 4 as moving image data at constant frame display time intervals.

FIG. 1 shows an example in which cut 1 and cut 2 are sequentially read and displayed as one logically continuous moving image data. Cut 1 is composed of two frame groups (GOP: Group Of Picture).
It is composed of GOP1 and GOP2. The GOP is composed of a plurality of consecutive frame groups, and the encoded data of each cut in the encoding / decoding unit 3 is collected and read from the storage medium 2 in units of this GOP. The number of GOP frames is determined from the data read rate of the storage medium 2, the buffer size in the code decoding unit 3, and the like. Therefore, when displaying, the encoded data 202 of GOP1 of cut 1 and the encoded data 20 of GOP2 of cut 1 are displayed from the storage medium 2.
The coded data 204 of GOP1 of 3 and cut 2 is sequentially read. Further, 201 is volume information for recording general information of the storage medium 2.

In the present embodiment configured as described above, by skipping the last part of the encoded data 203,
A time margin corresponding to the seek time to the encoded data 204 is created, and the seek to the encoded data 204 is completed by using this time to prevent the interruption of the image.

The above-mentioned operations will be described below with reference to the time chart of FIG. 3 and the flowchart of FIG. Here, in the present embodiment, for simplification of description, the decoding process in the encoding / decoding unit 3 can be executed as a pipeline process, and in synchronization with the end of reading the encoded data of each GOP,
It is assumed that the display on the display unit 4 is started. Also, each GOP
The sum of the read time and access time of the encoded data of G is
The case where it is equal to the display time of OP is shown.

Reference numerals 31 to 36 in FIG. 3 indicate the read time and access time of the coded data of each GOP of cut 1 and cut 2 similarly to 21 to 26 in FIG. 2, and 37 is a seek time like 27 in FIG. .. t0 'to t3' indicate the time on the time chart. Here, the difference between FIG. 2 and FIG. 3 is that in FIG. 2, all the encoded data of GOP2 of cut 1 is read, whereas in FIG. The read of the encoded data of GOP2 is t
Discontinue at 1 ', cut end time GOP2 display end time t
The point is to complete the seek by 2 '.

In this way, by skipping a part of the encoded data of the previous GOP without reading it, a delay corresponding to the seek time is prevented. Therefore, the read time 34 of GOP2 of cut 1 of FIG. 3 is the read time 2 of GOP2 of cut 1 of FIG.
Compared to 4, seek time is 37 minutes, that is, (t2'-t
1 ') will be short. As a result, as shown in the display time of FIG. 3, the image is not interrupted at the connection portion of the cut 1 and the cut 2 and can be continuously displayed. Cut 1
The frame affected by the image quality to be decoded by skipping a part of the encoded data of GOP2 of
By devising the method of arranging the encoded data of, it is possible to arrange in a frame apart from the editing portion, and it can be done without any trouble for the editing operator as a previewer function. This will be described later.

The operation of FIG. 1 in the case of FIG. 3 is shown in the flowchart of FIG. First, in step 401, the edit processing information is interpreted by the management program 5, and continuous display of cut 1 and cut 2 is started. Cut 1 and cut 2
The recording address and the data size of the encoded data of are managed by the management program 5. In step 402, the storage medium control unit 1 is instructed to read the encoded data 202 of GOP1 of cut 1. In accordance with this instruction, in step 406, encoded data 2 of GOP1 of cut 1
02 is read from the storage medium 2 to the encoding / decoding unit 3, and the process proceeds to step 407. In Step 407, Step 40
An instruction is issued to decode and display the encoded data 202 read in step 6, and control is returned to the management program 5. Management program 5
Then, as a result, the process proceeds from step 402 to 403.

In step 403, GOP2 of cut 1
The skip amount corresponding to the seek time 37 is calculated from the positional relationship between the recording address of the encoded data 203 of No. 1 and the recording address of the encoded data 204 of GOP1 of the next cut 2, and the encoding of GOP2 of the cut 1 is calculated. Data 203
The storage medium control unit 1 is instructed to read out the portion obtained by subtracting the skip amount from. The storage medium control unit 1 reads the encoded data instructed in step 408, then instructes decoding and display of the readout encoded data in step 409, and returns control to the management program 5. Management program 5
Then, as a result, the process proceeds from step 403 to 404. In step 404, the storage medium control unit 1 is instructed to read the encoded data 204 of GOP1 of cut 2.

At this point, the G of the previous cut 1 is displayed on the display unit 4.
OP2 is being displayed and step 4 of the storage medium control unit 1
In step 10, by utilizing this time, the seek to the recording address of the encoded data 204 of GOP1 of cut 2 is completed, the encoded data 204 is read from the storage medium 1 to the encoding / decoding unit 3, and step 411 is performed. move on. In step 411, the decoding and display of the encoded data read in step 410 is instructed, the control is returned to the management program 5, and the process ends. Finally, a method of processing the skipped encoded data will be described. Video data encoding methods are roughly classified into frame correlation type and frame complete type.

The frame correlation type is an encoding method which utilizes the fact that images similar to the preceding and following frames are likely to appear in moving image data, and utilizes the correlation with the preceding and following frames. As a typical example of this frame correlation type encoding method, IS
MPEG (Moving P
There is a method called icture Expert Group). MPEG
Then, the difference from the preceding and following frames is calculated, 12 frames are grouped as a GOP, and the necessary header information is added to the encoded data of this GOP and recorded. In MPEG, GO
As a method of preventing an error in P from being influenced by using frame correlation and propagating to another GOP,
Three types of encoding are performed for each frame. An I frame that does not have a correlation with the preceding and following frames, a P frame that has a correlation with only the previous frame, and a B frame that has a correlation with the preceding and following frames.

These coded data are stored in the order of I-frame, P-frame, and B-frame in the order of importance required for decoding. Therefore, in MPEG, even if the last part of the encoded data of GOP is partially skipped as in the present embodiment, decoding of the corresponding GOP is possible. The data of the B frame that is missing due to the skipped effect can be redisplayed or interpolated in the preceding and following I frame or P frame. Furthermore, GO
By changing the order arrangement of the P encoded data, the position of the missing B frame can be arranged at a position away from the edited portion. Since the encoded data of each GOP is read from the storage medium 2 with one access, it may be rearranged in the original order in the buffer.

The other frame completion type is coding that does not utilize the correlation with the preceding and following frames. Compared to the frame correlation type, it is disadvantageous in terms of compression rate. On the other hand, in the frame correlation type, compared with the case where the coded data of the frame in which the correlation is taken at the time of decoding is required, the decoding can be performed only with the coded data of the corresponding frame, so that editing or copying in units of one frame can be performed. This is advantageous in terms of convenience when required. As a typical example of this frame-completed encoding method, JPEG (Join
In general, a method called “T Picture Expert Group” is used and moving image data is regarded as a sequence of JPEG-encoded data. In both MPEG and JPEG, ADCT (Adaptive Descr) that converts pixel values into frequency components
ete CosineTransfer) encoding system.

Particularly in JPEG, a decoding mode using a part of encoded data is also defined. This is a mode called progressive mode in which a coarse image using only the low-frequency part of encoded data is gradually decoded into a detailed image using high-frequency components. By using this mode, even if the high frequency part of the encoded data is skipped and skipped, it is possible to decode without reducing the number of frames that are decoded as frames with slightly coarse image quality. Furthermore, as in the case of the frame correlation type, GOP
If you take a method such as changing the order of the encoded data between multiple frames in the frame, you can separate the frame with poor image quality due to skipping from the edited part, and the previewer function for checking the edited result Does not hinder.

In the configuration example assuming that a storage medium having a general performance value is used at present, the data amount in this embodiment is roughly calculated as follows. Now, let's say N, which is the standard for TV broadcasting.
Consider an example where the TSC size is digitized. The frame size in this case is 720 horizontal by 480 vertical pixels,
If each pixel has 3 bytes of red, green, and blue (hereinafter abbreviated as B), the data amount per frame is approximately 1 megabyte (hereinafter abbreviated as MB). Frame display speed is 30
Assuming that the frame / second is encoded at a compression rate of 1/20 per frame, the amount of encoded data is 50 kilobytes (hereinafter abbreviated as KB) per frame. The amount of encoded data per second is (50 KB / frame × 30 frames / sec) = 1.5M
B / sec.

For the sake of simplicity, if the GOP is composed of 30 frames, the display time for 30 frames is 1
In this period, the access time is 50 milliseconds and the coded data (50 KB / frame × 30 frames) for 30 frames is read. Therefore, the data transfer rate in this case is about 1.6 MB / sec. The general performance values of the current storage medium generally take these values. The difference in performance depending on the storage medium used by each system is G for each system.
The display time is adjusted by changing the number of OP frames, the compression ratio, and the data size.

It is assumed that a seek of 100 milliseconds occurs from Cut 1 to Cut 2 in this apparatus. This 100 ms seek time can be absorbed by skipping and skipping 100 ms of data from the GOP of cut 1. In this case, the skipped data is 100 milliseconds × 1.6 MB / second = 160 KB. As shown in FIG. 3, if the encoding method is frame-complete type encoding using JPEG and the GOP encoded data is stored in order from low frequency components including important image information to high frequency components, The amount of encoded data to be skipped is about 10% or more of the high frequency components. A based on JPEG
In a subjective evaluation experiment of the DCT encoding method, 0.75 bits / pixel (about 1
There is also a report (corresponding to a compression rate of / 32) (13th Autumn Seminar of the Institute of Image Electronics Engineers of Japan, "Coding of color image"). Therefore, when a code amount of about 10% is skipped from the 1/20 coded data of the present invention (about 1 /
If the image quality is equivalent to the compression ratio of 22, the GOP can be placed in a frame away from the edited portion, which is a point of attention during playback, especially for simulation playback using the previewer function during editing work. As a whole, it is considered that the deterioration of the image quality due to the skip portion does not cause any trouble.

Although it has been described that the position of the rough frame of the image due to the skip can be moved away from the editing position by the arrangement of the coded data in the GOP, this position is further edited as the number of GOP frames is increased. It is possible to move away from the point.

When the preceding cut is composed of a plurality of GOPs like the cut 1 of this embodiment, the GOP immediately preceding the editing location may be skipped, and the coded data of the preceding GOP may be skipped. It is possible. It is also possible to divide the amount of data to be skipped and skip from a plurality of GOPs to reduce the roughness of image quality per GOP. However, in these cases, an extra seek time for skipping occurs between GOPs within the same moving image cut. For this reason, it is necessary to skip the amount of data slightly more by this extra seek time than in the method of FIG. For example, when a part of the encoded data 202 of GOP1 of cut 1 is skipped, the encoded data 20 of GOP2 of cut 1 starts from this skip start position.
An extra seek is required up to the recording address of 3. However, in this case, it is considered that the amount of encoded data to be skipped is small because of a slight head seek that skips a part of the encoded data 202.

Further, in the present embodiment, the structure for skipping the data for the seek time is shown. However, in the case of the structure having sufficient prefetch buffer in the system, the data for the time longer than the seek time is skipped. It is possible to pre-read the encoded data of cut 2. By using this, it is possible to display both moving image cuts in a temporally overlapping manner like an image switching effect such as a wipe.

In addition, it is also possible to absorb the seek time by skipping the reading of the coded data from the coded data of the GOP read immediately after the seek occurs. As shown in FIG. 5, when the display of the cut 1 ends, that is, the display start time t53 of the GOP 1 of the cut 2 is displayed.
Then, the reading of GOP1 of cut 2 is terminated, and the display of GOP1 of cut 2 is started. Also in this case, by arranging the encoded data as in the above description, it is possible to separate the position of the frame that becomes a rough image by skipping from the edit part to the rear part.

Finally, although the present embodiment has been described as a moving image output system, an operating system management method having a mechanism for logically handling a plurality of moving image cuts recorded physically apart as one file Also, the present invention can be applied.

[0037]

As described above, according to the present invention, a storage medium for recording and reading frame data of a moving image cut composed of a plurality of frames and a list of recording addresses and the number of frames in the storage medium for each frame data are provided. A management program to be created, a storage medium control unit that divides the frame data of the moving image cut specified by the management program into subframe data units of a fixed amount or less, and reads the storage medium from the storage medium, and a storage medium control unit that reads the storage medium control unit. And a display unit for displaying the generated sub-frame data at a constant frame time interval, and when the management program continuously displays a plurality of moving image cuts, the moving image cut frame data to be displayed first in the storage medium. Calculate the seek time from the recording address of to the recording address of the frame data of the video cut to be displayed next. Seek to the recording address of the frame data of the next video cut to be displayed within a time period in which the reading of the frame data of a size requiring at least the seek time from the subframe data of the video cut to be previously displayed is omitted. By doing so, it is possible to reproduce the video cuts physically recorded discontinuously in the storage medium without interruption, and can be applied to the previewer function of the video editing system.

[Brief description of drawings]

FIG. 1 is a block diagram of a moving image output system according to an embodiment of the present invention.

FIG. 2 is a time chart showing the relationship between data read time and display time in a conventional example.

FIG. 3 is a time chart showing the relationship between the data read time and the display time in this embodiment.

FIG. 4 is a flowchart showing an operation example in the present embodiment.

FIG. 5 is a time chart showing the relationship between the data read time and the display time in another embodiment.

[Explanation of symbols]

 1 Storage Medium Control Unit 2 Storage Medium 3 Code Decoding Unit 4 Display Unit 5 Management Program

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 5/91 N 8324-5C

Claims (10)

[Claims] 1. A storage medium for recording and reading frame data of a moving image cut composed of a plurality of frames, a management program for creating a list of recording addresses and the number of frames in the storage medium for each frame data, and the management. A storage medium control unit that reads out from the storage medium by dividing the frame data of the moving image cut specified by the program into subframe data units of a fixed amount or less, and the subframe data read by the storage medium control unit is fixed. And a display unit that displays at frame time intervals, and when the management program continuously displays a plurality of video cuts,
The seek time from the recording address of the frame data of the video cut to be displayed first to the recording address of the frame data of the video cut to be displayed next is calculated, and the read time of at least the seek time or more from the frame data of the video cut of the preceding display. The moving image output system is characterized in that the seek to the recording address of the frame data of the moving image cut to be displayed next is performed within a time when the reading of the frame data of the required size is omitted. 2. The reading of frame data of a size that requires a reading time of at least a seek time is omitted from the plurality of sub-frame data obtained by dividing the frame data of the moving picture cut to be displayed first. The video output system described in 1. 3. The moving image output system according to claim 1, wherein the frame data is compression-encoded encoded data, and the display unit further includes a decoding unit for decoding the encoded data. 4. The encoded data is encoded by a compression encoding method for converting a pixel value into a frequency component, and the encoded data is decoded by omitting reading from a high frequency component to a low frequency component in the order of priority. The moving image output system according to claim 3, wherein decoding is performed only from the encoded data read by the unit. 5. The display unit interpolates and displays a frame that cannot be decoded due to the omission of reading the encoded data by the preceding and following frames for display.
The described video output system. 6. A storage medium for recording and reading frame data of a moving image cut composed of a plurality of frames, a management program for creating a list of recording addresses and the number of frames in the storage medium for each frame data, and the management. A storage medium control unit that reads out from the storage medium by dividing the frame data of the moving image cut specified by the program into subframe data units of a fixed amount or less, and the subframe data read by the storage medium control unit is fixed. And a display unit that displays at frame time intervals, and when the management program continuously displays a plurality of video cuts,
The seek time from the recording address of the frame data of the video cut to be displayed first to the recording address of the frame data of the video cut to be displayed next is calculated, and the read time of at least the seek time or more from the frame data of the video cut of the next display. A moving image output system characterized by omitting reading of frame data of a size that requires 7. The reading of frame data of a size that requires a reading time of at least a seek time is omitted from a plurality of sub-frame data obtained by dividing frame data of a moving image cut to be displayed next. 6. The video output system described in 6. 8. The moving image output system according to claim 6, wherein the frame data is compression-encoded encoded data, and the display unit further includes a decoding unit for decoding the encoded data. 9. The coded data is coded by a compression coding method for converting a pixel value into a frequency component, and the coded data is decoded by omitting reading in a priority order from a high frequency component to a low frequency component. 9. The moving image output system according to claim 8, wherein decoding is performed only from the encoded data read by the unit. 10. The moving image output system according to claim 6, wherein the display unit interpolates and displays a frame that cannot be decoded due to the omission of reading the encoded data by the preceding and following frames.