JPH07211046A - Video server system - Google Patents

Abstract

PURPOSE:To improve the multiplicity of playback and record with information of a whole system being unitarily controlled by separating a part for performing the playback and record of a real time data from a part for controlling the information required for the control of the playback and record of the real time data to disperse the load of a system. CONSTITUTION:A moving picture is divided into every frame unit and recorded in moving picture storage parts 1a, 1b, 1c. A sequence data recording an address in which a moving picture is stored according to the frame sequence of the moving picture, is controlled by a system control part 2 to inform the corresponding sequence data by a playback request. Playback control parts 3a. 3b read out the frame data of a moving picture according to the sequence data of the moving picture to perform playback.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interactive video server system capable of reproducing or recording arbitrary real-time data at any time according to a user's request.

[0002]

2. Description of the Related Art In recent years, as an interactive television service, video-on-demand, which centrally manages video information and simultaneously accesses that information from a plurality of people, has been attracting attention (for example, Nikkei Communication 1993.
2.15 No.144 pp.38-55).

On the other hand, a relatively small one using a personal computer or a workstation has been announced (for example, Nikkei Electronics 1992.8.3 No.560 pp.104.
-112), which limits the image quality and the number of people who can provide the service. Larger ones have also been announced (for example, Tanaka, Shimojo, "Current state and future of moving image database technology", IPSJ Advanced Database Symposium '93 Proceedings, December 1993, pp.55.
-62), details are unknown.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to distribute the load on a system and improve the multiplicity of reproduction / recording while centrally managing information on the entire system.

[0005]

In a video server system that divides real-time data such as moving images and audio into units, assigns sequence numbers to them, and manages them as sequence data that constitutes real-time data, all real-time data sequences A sequence data management means for managing data, and a reproduction control means for acquiring sequence data of real time data to be reproduced from the sequence data management means and extracting a data string required for reproduction of the real time data according to the sequence data are provided.

[0006]

The sequence data management means manages the sequence data of all real-time data. The reproduction control means acquires the sequence data of the real-time data to be reproduced from the sequence data management means, and extracts the data string required for reproducing the real-time data according to the sequence data. In other words, by separating the part that manages the information required to control the playback / recording of real-time data from the part that performs the playback / recording of real-time data, the system load is distributed and the information of the entire system is centrally managed. Meanwhile, the multiplicity of reproduction / recording can be improved.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of a video server system in Embodiment 1 of the present invention. Reference numerals 1a, 1b, and 1c denote moving image storages, which record data of a single moving image or a plurality of moving images by dividing it into frame units. A system management unit 2 manages the sequence data in which the information of the address where the moving image data is accumulated is recorded according to the frame order of the moving image, and notifies the corresponding sequence data by a reproduction request. Reference numerals 3a and 3b are reproduction control units, which read out the frame data of the moving image based on the sequence data of the moving image and reproduce the frame data. Reference numeral 4 denotes a data transmission path, which is a moving image storage unit 1.
a, 1b, 1c, the system management unit 2, the reproduction control unit 3a,
Data transmission between 3b is performed.

FIG. 2 is a block diagram showing the internal configuration of the system management unit 2. Reference numeral 5 denotes a sequence data management unit, which records sequence data of a moving image. A sequence data notifying unit 6 receives a request and notifies sequence data of a corresponding moving image.

FIG. 3 is a block diagram showing the internal structure of the reproduction controller 3. A sequence data temporary storage unit 7 temporarily stores sequence data of a moving image to be reproduced. 8 is a sequence data acquisition unit,
Requests playback of a movie and acquires sequence data. 9
Is a frame data read control unit, and according to the sequence data of the sequence data temporary storage unit 7,
Read the frame data of the moving image.

Actually, in addition to this, various components such as a function of reproducing a moving image from frame data of a moving image, a function of performing an interface process with a user, a function of processing a communication interface with the data transmission path 4 are required. But,
Since it is not the main subject of the present invention, it is omitted.

The operation of the video server system configured as above will be described.

FIG. 4 shows an embodiment of the sequence data managed by the sequence data management unit 5. In this example, there are a moving image 1, a moving image 2, and a moving image 3, and the sequence number, the ID of the moving image storage unit that stores the frame data, and the file name are managed for each moving image.

When the user makes a reproduction request for the moving image 1, the sequence data acquisition unit 8 requests the system management unit 2 for the sequence data of the moving image 1 through the data transmission path 4.
Upon receiving the request, the sequence data notification unit 6 of the system management unit 2 notifies the reproduction control unit 3 of the sequence data of the moving image 1 managed by the sequence data management unit 5 through the data transmission path 4. The sequence data acquisition unit 8 receives the sequence data and sets the contents in the sequence data temporary storage unit 7. The frame data reading control unit 9 reads the frame data of the moving image from the moving image storage units 1a, 1b, and 1c according to the sequence data of the sequence data temporary storage unit 7 and reproduces the moving image.

In the first embodiment, the moving picture data is divided in units of frames, but it is also possible to divide a plurality of frames together or to divide one frame further.

In the first embodiment, the number of moving image storage units is three and the number of reproduction control units is two, but the number can be increased.

Further, in the first embodiment, the entire sequence data of the moving image is collectively obtained, but it is also possible to divide the sequence data in units of 10 minutes and obtain sequentially.

As described above, the load can be dispersed by separating the function for managing the sequence data of the moving image and the portion for reproducing the moving image according to the sequence data.

(Second Embodiment) Next, a video server system according to a second embodiment of the present invention will be described.

FIG. 5 is a block diagram showing the configuration of the video server system according to the second embodiment of the present invention. 10a, 1
Reference numerals 0b and 10c denote moving image storages, which record data of a single moving image or a plurality of moving images in frame units. Reference numeral 11 denotes a system management unit, which manages sequence data in which information on an address at which moving image data is stored is recorded according to a frame order of the moving image, and in which a moving image data can be written in the moving image storage unit. Manages the address information of, and edits and notifies the sequence data of the area that meets the requirement according to the request of recording. Reference numeral 12 denotes a recording control unit, which writes moving image frame data based on the sequence data in the recording area to perform recording. Reference numeral 13 denotes a data transmission path, which is the moving image storage section 10a, 10b, 10c.
And data transmission between the system management unit 11 and the recording control unit 12.

FIG. 6 is a block diagram showing the internal structure of the system management unit 11. Reference numeral 14 denotes a sequence data management unit, which records moving image sequence data. Reference numeral 15 denotes a free area management unit, which manages an area in which a new moving image can be recorded. Reference numeral 16 denotes a free space sequence data notification unit, which receives a request, edits the sequence data of the corresponding free space, and notifies it.

FIG. 7 is a block diagram showing the internal configuration of the recording controller 12. A sequence data temporary storage unit 17 temporarily stores the sequence data of the recording area. A free space sequence data acquisition unit 18 requests the recording of a moving image and acquires sequence data. A frame data writing control unit 19 writes the frame data of the moving image according to the sequence data of the sequence data temporary storage unit 17.

Actually, besides this, various components such as a function of converting a moving image into frame data, a function of performing an interface process with a user, a function of processing a communication interface with the data transmission line 13 are required. Since it is not the main subject of the present invention, it is omitted.

The operation of the video server system configured as described above will be described.

FIG. 8 shows an example of free area information managed by the free area management unit 15. In this example, the writable moving image storage unit ID and file name are managed.

When a user requests a video recording, the free area sequence data acquisition unit 18 requests the system management unit 11 through the data transmission path 13 for sequence data for recording a video. Upon receiving the request, the free space sequence data notification unit 16 of the system management unit 11 refers to the free space information managed by the free space management unit 15 and edits the sequence data for recording the requested moving image. Then, the recording control unit 12 is notified through the data transmission line 13. Free area sequence data acquisition unit 18
Receives the sequence data and sets the contents in the sequence data temporary storage unit 17. The frame data write control unit 19 follows the sequence data in the sequence data temporary storage unit 17 and stores the moving image storage units 10a, 10b, 1
The frame data of the moving image is written in 0c and the moving image is recorded.

In the second embodiment, the moving image data is divided on a frame-by-frame basis, but it is also possible to divide a plurality of frames together or to divide one frame further.

In the second embodiment, the number of moving picture storage units is three and the number of recording control units is one, but the number can be increased.

Further, in the second embodiment, the entire sequence data of the moving image is acquired in a lump, but it is also possible to divide the sequence data in units of 10 minutes and acquire the sequence data sequentially.

Further, in the second embodiment, when the user requests the recording of the moving image, the recording control unit 12 performs the recording. However, a method of requesting the recording of the moving image from the system management unit 11 is also possible.

As described above, the load can be dispersed by separating the function for managing the sequence data of the moving image and the portion for recording the moving image according to the sequence data.

(Third Embodiment) Next, a video server system according to a third embodiment of the present invention will be described.

The block diagram showing the configuration of the video server system according to the third embodiment of the present invention is the same as FIG. 1 of the first embodiment. However, in addition to the processing of the first embodiment, the system management unit 2 performs charging processing for moving image reproduction.

FIG. 9 is a block diagram showing the internal configuration of the system management unit 2. Reference numeral 20 denotes a sequence data management unit, which records sequence data of a moving image. Reference numeral 21 denotes a sequence data notification unit, which receives a request and notifies sequence data of a corresponding moving image.
A charge management unit 22 performs a charge process in response to a moving image reproduction request.

The block diagram showing the internal structure of the reproduction control section 3 in the third embodiment of the present invention is the same as that in FIG. 3 of the first embodiment.

Actually, in addition to this, various components such as a function of reproducing a moving image from frame data of a moving image, a function of performing an interface process with a user, a function of processing a communication interface with the data transmission path 4 are required. But,
Since it is not the main subject of the present invention, it is omitted.

The operation of the video server system configured as above will be described.

An embodiment of the sequence data managed by the sequence data management unit 20 in the third embodiment of the present invention is the same as that in FIG.

When the user makes a reproduction request for the moving image 1, the sequence data acquisition unit 8 requests the system management unit 2 for the sequence data of the moving image 1 through the data transmission path 4.
Upon receiving the request, the sequence data notification unit 21 of the system management unit 2 sends the sequence data of the moving image 1 managed by the sequence data management unit 20 to the data transmission line 4
To the reproduction control unit 3 through the charging management unit 22
Is notified that the request for video 1 has been accepted. The billing management unit 22 bills according to the requested moving image. The sequence data acquisition unit 8 receives the sequence data and sets the contents in the sequence data temporary storage unit 7. The frame data read-out control unit 9 follows the sequence data stored in the sequence data temporary storage unit 7 and stores the moving image storage units 1a and 1a.
The frame data of the moving image is read from b and 1c and the moving image is reproduced.

Although the moving image data is divided in units of frames in the third embodiment, it is possible to divide a plurality of frames together or to divide one frame further.

In the third embodiment, the number of moving image storage units is three and the number of reproduction control units is two, but the number can be increased.

Further, in the third embodiment, the entire sequence data of the moving image is acquired at one time, but it is also possible to divide the sequence data in units of 10 minutes and acquire it sequentially.

Further, in the third embodiment, the billing is performed at the time when the request for reproducing the moving image is issued and the sequence data is notified, and after that, the use of the sequence data is not restricted, but the sequence data can be used. It is also possible to limit the number of times and time.

As described above, even in the case where the function of managing the sequence data of the moving image and the part for reproducing the moving image according to the sequence data are separated, the charging process is performed by charging at the time of the reproduction request. The load of can be reduced.

(Fourth Embodiment) Next, a video server system according to a fourth embodiment of the present invention will be described.

The block diagram showing the configuration of the video server system according to the fourth embodiment of the present invention is the same as FIG. 1 of the first embodiment. However, in addition to the processing of the first embodiment, the system management unit 2 monitors the load of the system and determines whether or not to permit the moving image reproduction.

FIG. 10 is a block diagram showing the internal configuration of the system management unit 2. Reference numeral 23 is a sequence data management unit, which records sequence data of a moving image. Reference numeral 24 denotes a sequence data notification unit that receives a request and notifies the sequence data of the corresponding moving image. A load determination unit 25 estimates the system load according to the received playback request of the moving image and determines whether to permit the received playback request.

The block diagram showing the internal structure of the reproduction control unit 3 in the fourth embodiment of the present invention is the same as that in FIG. 3 of the first embodiment.

Actually, in addition to this, various components such as a function of reproducing a moving image from frame data of a moving image, a function of performing an interface process with a user, a function of processing a communication interface with the data transmission path 4 are required. But,
Since it is not the main subject of the present invention, it is omitted.

The operation of the video server system configured as above will be described.

An embodiment of the sequence data managed by the sequence data management unit 23 in the fourth embodiment of the present invention is the same as in FIG.

When the user makes a reproduction request for the moving image 1, the sequence data acquisition unit 8 requests the system management unit 2 for the sequence data of the moving image 1 through the data transmission path 4.
When the sequence data notification unit 24 of the system management unit 2 receives the request, it inquires of the load determination unit 25 whether to permit the reproduction of the moving image. The load determining unit 25 determines whether or not to permit the reproduction based on the situation of the moving image being reproduced at that time, and notifies the sequence data notifying unit 24.
When the sequence data notification unit 24 receives from the load determination unit 25 that the video reproduction is permitted, the sequence data notification unit 24 notifies the reproduction control unit 3 of the sequence data of the video 1 managed by the sequence data management unit 23 through the data transmission path 4. To do.
When the sequence data notification unit 24 receives from the load determination unit 25 that the video reproduction is not permitted, the sequence data notification unit 24 notifies the reproduction control unit 3 through the data transmission path 4. When the sequence data acquisition unit 8 receives the sequence data, it sets the contents in the sequence data temporary storage unit 7. The frame data reading control unit 9 reads the frame data of the moving image from the moving image storage units 1a, 1b, and 1c according to the sequence data of the sequence data temporary storage unit 7 and reproduces the moving image. When the sequence data acquisition unit 8 receives the fact that the reproduction of the moving image is not permitted, the sequence data acquisition unit 8 notifies the user of that fact and does not read the frame data.

Although the moving image data is divided in units of frames in the fourth embodiment, it is possible to divide a plurality of frames together or to divide one frame further.

In the fourth embodiment, three moving image storage units and two reproduction control units are used, but the number can be increased.

Further, in the fourth embodiment, the whole sequence data of the moving image is acquired at one time, but it is also possible to divide the sequence data in units of 10 minutes and acquire it sequentially.

In the fourth embodiment, the system load is determined only by the reproduction request. However, the system load is determined by combining the recording request and the reproduction request, and the data transmission path and the moving image storage unit are also used. It is also possible to judge by the load of.

As described above, even when the function of managing the sequence data of the moving image and the portion for reproducing the moving image according to the sequence data are separated, the determination as to whether or not to permit the moving image reproduction is performed centrally. By performing the request at the time when the request is generated, it is possible to easily perform the regulation process for the reproduction exceeding the performance of the system.

(Fifth Embodiment) Next, a video server system according to a fifth embodiment of the present invention will be described.

The block diagram showing the configuration of the video server system according to the fifth embodiment of the present invention is the same as FIG. 1 of the first embodiment. However, in addition to the processing of the first embodiment, the system management unit 2 has a function of editing sequence data of a moving image according to the reproduction mode.

FIG. 11 is a block diagram showing the internal configuration of the system management unit 2. Reference numeral 26 denotes a sequence data management unit, which records moving image sequence data. Reference numeral 27 denotes a sequence data notification unit that receives a request and notifies the sequence data of the corresponding moving image. A sequence data editing unit 28 edits the sequence data according to the reproduction mode when the received reproduction request of the moving image is not normal reproduction but double-speed reproduction.

The block diagram showing the internal structure of the reproduction control section 3 in the fifth embodiment of the present invention is the same as FIG. 3 in the first embodiment.

Actually, in addition to this, various components such as a function of reproducing a moving picture from frame data of a moving picture, a function of performing an interface process with a user, a function of processing a communication interface with the data transmission path 4 are required. But,
Since it is not the main subject of the present invention, it is omitted.

The operation of the video server system configured as described above will be described.

An embodiment of the sequence data managed by the sequence data management unit 23 in the fifth embodiment of the present invention is the same as that in FIG.

When the user requests the double speed reproduction of the moving image 1, the sequence data acquisition unit 8 specifies the double speed reproduction to the system management unit 2 through the data transmission path 4 and requests the sequence data of the moving image 1. When the sequence data notification unit 27 of the system management unit 2 receives the request, it extracts the sequence data of the moving image 1 managed by the sequence data management unit 26 and edits the received sequence data to the double speed reproduction mode. Ask 28. The sequence data editing unit 28 edits the requested sequence data according to the designated reproduction mode, for example, in the double speed reproduction mode, takes out every other sequence data. The sequence data notification unit 27 notifies the reproduction control unit 3 of the edited sequence data via the data transmission line 4. When the sequence data acquisition unit 8 receives the sequence data, it sets the contents in the sequence data temporary storage unit 7. The frame data reading control unit 9 follows the sequence data stored in the sequence data temporary storage unit 7 according to the moving image storage unit 1a
Double-speed reproduction is performed by reading frame data of moving images from 1b and 1c and reproducing the moving images.

Although the moving picture data is divided in units of frames in the fifth embodiment, it is possible to divide a plurality of frames together or to divide one frame further.

Further, in the fifth embodiment, every other sequence data is taken out when editing the sequence data for double speed reproduction, but it depends on the management method such as in which unit the moving image is divided and managed. It is also possible to adopt an editing method.

In the fifth embodiment, the number of moving image storage units is three and the number of reproduction control units is two, but the numbers can be increased.

Further, in the fifth embodiment, the entire sequence data of the moving image is acquired in a lump, but it is also possible to divide it in units of 10 minutes and acquire it sequentially.

In the fifth embodiment, the reproduction mode is specified for the entire moving image to edit the sequence data, but the special reproduction mode is specified and the sequence data is acquired at any time in response to the user's request. It is also possible.

By thus separating the function of managing and editing the sequence data of the moving image and the part for reproducing the moving image according to the sequence data, the load for performing the special reproduction of the moving image can be distributed. Further, it is possible to reduce the processing of the part that performs moving image reproduction.

(Sixth Embodiment) Next, a video server system according to a sixth embodiment of the present invention will be described.

The block diagram showing the configuration of the video server system according to the sixth embodiment of the present invention is the same as FIG. 1 of the first embodiment.

FIG. 12 is a block diagram showing the internal configuration of the system management unit 2. Reference numeral 29 is a sequence data management unit, which records sequence data of a moving image. Reference numeral 30 denotes a sequence data search, which receives a request and notifies a corresponding sequence data portion of a corresponding moving image.

FIG. 13 is a block diagram showing the internal structure of the reproduction controller 3. A sequence data temporary storage unit 31 temporarily stores sequence data of a moving image to be reproduced. Reference numeral 32 denotes an automatic sequence data acquisition unit, which acquires sequence data as needed in accordance with the reproduction of a moving image. A frame data read control unit 33 reads out frame data of a moving image according to the sequence data of the sequence data temporary storage unit 7.

In addition to this, various constituent elements such as a function of reproducing a moving image from frame data of a moving image, a function of performing an interface process with a user, and a function of processing a communication interface with the data transmission path 4 are actually required. But,
Since it is not the main subject of the present invention, it is omitted.

The operation of the video server system configured as described above will be described.

An embodiment of the sequence data managed by the sequence data management unit 23 in the sixth embodiment of the present invention is the same as that in FIG.

When the user makes a reproduction request for the moving image 1, the sequence data automatic acquisition unit 32 requests the system management unit 2 through the data transmission line 4 for the first 10 minutes of the sequence data of the moving image 1. When the sequence data search unit 30 of the system management unit 2 receives the request, it extracts the first 10 minutes of the sequence data of the moving image 1 managed by the sequence data management unit 29, and the data transmission line 4
To the reproduction control unit 3. The sequence data automatic acquisition unit 32 sets the received sequence data in the sequence data temporary storage unit 31. The frame data reading control unit 33 follows the sequence data in the sequence data temporary storage unit 31 according to the sequence data,
The frame data of the moving image is read from 1b and 1c and the moving image is reproduced. The sequence data automatic acquisition unit 32 requests the next required sequence data by referring to the reproduction mode and the sequence data set in the sequence data temporary storage unit 31. For example, in the normal reproduction mode, when the sequence data set in the sequence data temporary storage unit 31 is reproduced up to 90% from the beginning, the sequence data for the next 10 minutes is acquired. Is the sequence data temporary storage unit 31.
When the sequence data set to 80% from the beginning of the sequence data is reproduced, the next 10 minutes of sequence data is acquired. In the reverse reproduction mode, the sequence data set in the sequence data temporary storage unit 31 When the data is reproduced up to 10% from the beginning, the sequence data for the previous 10 minutes is acquired, and in the case of the reproduction from 30 minutes before, the currently reproduced portion of the sequence data set in the sequence data temporary storage unit 31. For example, the sequence data for 10 minutes 30 minutes before is acquired.

Although the moving image data is divided in units of frames in the sixth embodiment, it is also possible to divide a plurality of frames together or to divide one frame further.

In the sixth embodiment, three moving image storage units and two reproduction control units are used, but this number can be increased.

Further, in the sixth embodiment, the sequence data of the moving image is acquired in units of 10 minutes, but it is also possible to acquire it in units of longer time or shorter time.

As described above, in the case where the function of managing and editing the sequence data of the moving image and the portion for reproducing the moving image according to the sequence data are separated, the sequence data is divided and acquired to obtain the sequence on the reproducing side. The amount of memory required to store the data can be reduced. Further, by acquiring the sequence data according to the reproduction mode, the necessary sequence data can be surely acquired by the necessary time.

[0084]

As described above, according to the present invention, the part for managing the information required for controlling the reproduction / recording of real-time data and the part for reproducing / recording the real-time data are separated from each other. Load distribution,
There is an effect that the multiplicity of reproduction / recording can be improved while centrally managing the information of the entire system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a video server system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a system management unit 2 according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing an internal configuration of a reproduction control unit 3 according to the first embodiment of the present invention.

FIG. 4 is a diagram showing an example of sequence data of a moving image managed by a sequence data management unit 5 in Example 1 of the present invention.

FIG. 5 is a block diagram showing a configuration of a video server system according to a second embodiment of the present invention.

FIG. 6 is a system management unit 11 according to the second embodiment of the present invention.
Block diagram showing the internal configuration of the

FIG. 7 is a block diagram showing an internal configuration of a recording control unit 12 in Embodiment 2 of the present invention.

FIG. 8 is a free area management unit 15 according to the second embodiment of the present invention.
Of an example of free area information managed by

FIG. 9 is a block diagram showing an internal configuration of a system management unit 2 in Embodiment 3 of the present invention.

FIG. 10 is a system management unit 2 according to the fourth embodiment of the present invention.
Block diagram showing the internal configuration of the

FIG. 11 is a system management unit 2 according to the fifth embodiment of the present invention.
Block diagram showing the internal configuration of the

FIG. 12 is a system management unit 2 according to the sixth embodiment of the present invention.
Block diagram showing the internal configuration of the

FIG. 13 is a block diagram showing an internal configuration of a reproduction control unit 3 in Embodiment 6 of the present invention.

[Explanation of symbols]

 1a, 1b, 1c Video storage unit 2 System management unit 3a, 3b Playback control unit 4 Data transmission path 5 Sequence data management unit 6 Sequence data notification unit 7 Sequence data temporary storage unit 8 Sequence data acquisition unit 9 Frame data read control unit 10a 10b, 10c moving image storage unit 11 system management unit 12 recording control unit 13 data transmission path 14 sequence data management unit 15 empty area management unit 16 empty area sequence data notification unit 17 sequence data temporary storage unit 18 empty area sequence data acquisition unit 19 Frame data writing control unit 20 Sequence data management unit 21 Sequence data notification unit 22 Billing management unit 23 Sequence data management unit 24 Sequence data notification unit 25 Load determination unit 26 Sequence data management unit 27 Sequence Data notifying unit 28 sequence data editing unit 29 sequence data management unit 30 sequence data retrieval unit 31 sequence data temporary storage unit 32 sequence data automatic acquisition unit 33 frame data read control unit

Claims (11)

[Claims] 1. A video server system for dividing real-time data such as moving images and audio into units and assigning sequence numbers to them to manage them as sequence data constituting real-time data. Sequence data management means and reproduction control means for obtaining sequence data of real-time data to be reproduced from the sequence data management means and extracting a data string required for reproduction of the real-time data according to the sequence data. Video server system. 2. In a video server system for dividing real-time data into units and assigning sequence numbers to them to manage them as sequence data constituting real-time data, a free area for recording real-time data is newly managed. Equipped with a free area management means for creating sequence data for recording real-time data, and a recording control means for acquiring sequence data necessary for recording the recorded data from the free area management means and writing the real-time data according to the sequence data. A video server system characterized in that 3. The video server system according to claim 1, further comprising a billing management unit for billing when the sequence data of the real-time data is acquired from the sequence data management unit. 4. The video according to claim 1, further comprising reproduction permission judging means for judging whether to permit reproduction depending on a load of the system when the sequence data of the real time data is acquired from the sequence data managing means. Server system. 5. A recording permission judging means for judging whether to permit recording of the real-time data depending on the load of the system when acquiring the sequence data of the real-time data from the free space managing means. The described video server system. 6. The video server system according to claim 4, wherein the load of the system is judged by the number of real-time data being reproduced or recorded. 7. The video server system according to claim 5, wherein the load of the system is judged by the number of real-time data being reproduced or recorded. 8. A sequence data editing means for editing and notifying the sequence data according to a reproduction mode when the sequence data of the real-time data is acquired from the sequence data management means.
The described video server system. 9. The video according to claim 1, wherein when the sequence data of the real-time data is acquired from the sequence data management means, the necessary sequence data is sequentially acquired instead of acquiring the entire sequence data of the real-time data. Server system. 10. The video according to claim 2, wherein when the sequence data of the real-time data is obtained from the free space management means, necessary sequence data is sequentially obtained instead of obtaining the whole sequence data of the real-time data. Server system. 11. The video server system according to claim 10, wherein the acquisition method is changed according to the reproduction mode when the sequence data of the real-time data is sequentially acquired from the sequence data management means.