JPH1116276A - Network answering cd forming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously form CDs for a certain user and another user when plural users form simultaneously the CDs by providing the means capable of simultaneously forming plural sheets of CDs regardless of a change in a data amount outputted from a client personal computers of respective users. SOLUTION: A CPU 1 controls respective parts such as a RAM 3, first to third CD-R/RW devices 2a-2c, etc., by a stored program in a program storage part 4 to read, write in and rewrite the CD. The RAM 3 stores the write-in data required when the CD is formed, the information related to the client PC transmitting the data and a temporary file, etc. A controller 6 selects and inputs, etc., the write-in data, and a network connecting device 7 mediates the transmission/reception of the data between with the client PCs and between the CPU 1 and RAM 3, etc., and the network. Thus, separate plural users can form simultaneously the CDs, and availability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-R (write-once type) or CD-RW (rewritable type: rewritable type) disk (hereinafter referred to as a CD-R / RW disk).
The present invention relates to a network-compatible CD creation system that uses a computer.

[0002]

2. Description of the Related Art Conventionally, a network-compatible CD creation system has been used. In this system, each client personal computer (hereinafter referred to as client P)
C) transmits data for creating a CD through a network by a user operation. Here, a network-compatible CD creation system will be briefly described.

FIG. 5 is a block diagram showing an example of a schematic configuration of a network-compatible CD creation system. In the figure, NCD indicates a CD creation unit.

As shown in FIG. 5, each client P
C1 to PC3 transmit data for creating a CD by a user operation to a CD creating unit NC via a network.
Send to D. This CD creation unit NCD
Each client PC1 to PC3 through the network
This is a main part of a network-compatible CD creation system that has a function of receiving data transmitted from (each user) and creating a CD. However, in the conventional network-compatible CD creation system, a plurality of
D creation and interruption of data sent through the network were not assumed. Therefore, if data sent through the network is interrupted when multiple or single users simultaneously create a CD, the writing is terminated at that point and the data between the information in the data management unit and the data unit is lost. Causes a logical inconsistency, and cannot be read from the OS.
D was created.

[0005]

As described in the prior art, the conventional network-compatible CD creation system includes:
Needless to say that a plurality of users create a CD at the same time, no consideration is given to an abnormal situation in which data transmitted through a network is interrupted.
Therefore, if a plurality of users perform an operation of creating a CD at the same time, only the first user can respond, and other users cannot create a CD until the creation of the CD is completed. Due to interruption of data, OS
There is a problem that a CD that cannot be read from a CD is created. According to the present invention, a plurality of users
It is an object of the present invention to make it possible to create a character string (the invention of claim 1). Also, even if data output is interrupted due to a trouble of a client PC used by a plurality or a single user, a valid portion of already obtained data is determined, and data up to the valid portion is written. It is an object of the present invention to create a CD that can be read from an OS (claims 2 to 4).

[0006]

According to the first aspect of the present invention, there is provided a CD-ROM.
In a network system provided with a CD creating means that allows a plurality of users to create a CD using an R (write-once) or CD-RW (rewritable) disc, a plurality of users can simultaneously create a CD. Is performed, a means capable of simultaneously creating a plurality of CDs regardless of a change in the amount of data output from each user's client personal computer is provided.

According to a second aspect of the present invention, in the network-compatible CD creation system of the first aspect, when data output is interrupted due to a trouble in a user's client personal computer while a plurality or a single user creates a CD. There is provided valid data determination means for determining a valid portion of already obtained data.

According to a third aspect of the present invention, in the network-compatible CD creation system according to the second aspect, when data output is interrupted due to a trouble in the user's client personal computer, the valid data determining means determines the valid portion up to the valid portion. There is provided a data management unit creating means for creating a data management unit for managing data and data up to the previous session.

According to a fourth aspect of the present invention, in the network-compatible CD creation system of the third aspect, when data output is interrupted due to a trouble in the user's client personal computer, only the data management unit created by the data management unit creation means is provided. Is added to the next session.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Network-compatible CD of the present invention
An embodiment of the creation system will be described in detail with reference to the drawings. This embodiment is common to the first and second embodiments described later, and mainly describes the hardware configuration.

FIG. 1 shows a network compatible CD according to the present invention.
FIG. 1 is a functional block diagram illustrating an example of an embodiment of a main configuration of a creation system. In the figure, 1 is CP
U, 2a to 2c are first to third CD-R / RW devices, 3 is a RAM, 4 is a program storage unit, 5 is a temporary file / received data storage unit, 6 is a control device, 7 is a network connection device, Reference numeral 8 denotes a system bus.

The network-compatible CD creation system shown in FIG. 1 is an improvement of the CD creation unit NCD shown in FIG. 5, in which the CPU 1 controls the control in accordance with the program stored in the program storage unit 4. This is a configuration for executing the function described in the problem to be solved earlier. The function of each part is roughly as follows. The CPU 1 operates according to the program stored in the program storage unit 4 in the RAM 3 built in or connected to the apparatus shown in FIG.
A central processing unit having a function of controlling the entire system such as the / RW devices 2a to 2c and executing necessary calculations and processes. The CD creation program used in the network-compatible CD creation system of the present invention is stored in the program storage unit 4.

First to third CD-R / RW devices 2
a to 2c indicate reading / writing of a CD in the case of a CD-R disc, or a CD in the case of a CD-RW disc.
It has a function of rewriting in addition to reading and writing of. Further, it has its own CPU / RAM, and performs data transfer and CD creation / reading according to instructions from the CPU 1 in FIG. Although FIG. 1 shows a case of three devices 2a to 2c, four or more devices may be used, or two devices may be used. The RAM 3 stores write data necessary for creating a CD, information on a client PC that has transmitted the write data, and the like. Further, the first to third CD-R / RW devices 2
When a program instructs a to 2c to perform CD-R writing / reading or CD-RW writing / reading / rewriting, the storage means is used for creating a temporary file used for creating a CD. .

The temporary file / received data storage section 5 is a storage means for storing received data sent from the client PC via the network, management information for managing the data, and storing a temporary file and the like. The control device 6 is an input means such as a keyboard and a mouse for inputting necessary commands to the device shown in FIG. 1, and has functions necessary for system control by an operator, for example, a function of selecting or inputting write data. Have. The network connection device 7 connects the device of FIG. 1 to a network to transmit and receive data to and from the client PC.
It has a function of mediating between the CPU 1, the RAM 3 and the like and a network. The above is the description of the network-compatible C of the present invention.
The outline of the function of each section of the D creation system (corresponding to the improvement of the CD creation section NCD shown in FIG. 5) is common to the following first and second embodiments.

First Embodiment Although this first embodiment corresponds to the invention of claim 1, it also relates to the invention of claims 2 to 4,
The invention of claim 1 is a basic invention. In the first embodiment, when a plurality of users create CDs simultaneously,
It is characterized in that a plurality of CDs can be simultaneously created regardless of a change in the amount of data output from the client PC of each user (the invention of claim 1). Such processing is executed by the network-compatible CD creation system shown in FIG. 1, and is specifically realized by the control of the CPU 1 in accordance with the program in the CD creation system shown in FIG. . The operation of the network-compatible CD creation system of the present invention according to the first embodiment will be described with reference to a flowchart. FIGS. 2 and 3
Is controlled by the CPU 1 of FIG.

FIGS. 2 and 3 show a network-compatible CD creation system according to the present invention.
5 is a flowchart showing a flow of a main process at the time of simultaneous creation. In the figure, # 1 to # 14 indicate steps,
Indicates a connection.

In step # 1 of FIG. 2, the client PC
Is checked for a CD creation request. Upon receiving a CD creation request from the client PC, step # 2
To create a CD-R / RW format based on the received data. In step # 3, data is written to the first to third CD-R / RW devices 2a to 2a.
c to one of the devices. Next step #
At 4, it is checked whether or not there is a CD creation request from another client PC. When a CD creation request is received from another client PC, the process proceeds to step # 5, where a CD-R / RW format is created based on the received data.
In step # 6, the first to third write-in
The data writing by one of the CD-R / RW devices 2a to 2c is continued. Step #
At 7, the writing of the newly received data is instructed to another of the first to third CD-R / RW devices 2a to 2c.

Proceeding to step # 8 in FIG. 3, the first to third CD-R / RW devices 2a which have started writing earlier
2c continues writing data by one device, and proceeds to step # 9. In step # 9, it is checked whether the normal transmission end of the data being received from any client PC is detected. If the normal transmission end of the data being received is detected, step # 10
To the CD-R / RW device for which data writing has been completed (first to third CD-R / RW devices 2 a to 2
2c) is closed, and in the next step # 11, it is checked whether there is any device currently being written. If there is a device currently writing, go back to the previous step #
4 (connection in FIG. 2), and the same processing is repeated.
In addition, as a result of the determination in the previous step # 9, even when the normal transmission end of the data being received is not detected from any client PC, the process returns to the previous step # 4 (connection in FIG. 2).

On the other hand, if there is no CD creation request from another client PC as a result of the determination in the previous step # 4, the process proceeds to step # 12 in FIG. 3 (connection), and data writing is continued. . In the next step # 13, it is checked whether the normal transmission end of the data being received is detected. When the end of the normal transmission is detected, the process proceeds to step # 14, and the first to third CDs from which writing has been started.
-Instruct to close the write session of one of the R / RW devices 2a to 2c, and end the flow of FIG. Through the processing in steps # 1 to # 14, it is possible to simultaneously create a plurality of CDs regardless of the change in the amount of data output from the client personal computer of each user. That is, according to the network-compatible CD creation system shown in FIG. 1, it is possible to realize such a function, and while a certain user is creating a CD among a plurality of users, another user can simultaneously create a CD. You can create a CD.

Second Embodiment The second embodiment corresponds to the second to fourth aspects of the present invention. In the first embodiment, the means capable of simultaneously creating a plurality of CDs regardless of a change in the amount of data output from each user's client personal computer has been specifically described. The second embodiment is also based on the premise that the means for simultaneously creating a plurality of CDs is used. However, during the creation of a CD by a plurality or a single user, a trouble occurs in the client PC of the user. It has a feature in processing when data output is interrupted. First, when the output from the client PC is interrupted, a process of automatically determining an effective portion of the user data portion already obtained in the network-compatible CD creation system is performed (the invention of claim 2).

Next, after automatically determining the valid data portion, a process of creating a user data management unit for managing user data determined to be valid and user data up to the previous session is performed. (The invention of claim 3).
Further, only the created user data management unit is added to the next session (invention 4). Each of these processes is also performed on the network compatible CD shown in FIG.
It is executed by the creation system, but is specifically realized in the CD creation system shown in FIG. 1 by control of the CPU 1 according to a program. The network-compatible C of the present invention according to the second embodiment described above
The operation of the D creation system will be described with reference to a flowchart.

FIG. 4 shows a network compatible CD according to the present invention.
9 is a flowchart showing a main processing flow when data is interrupted halfway during transmission from a client PC in the creation system. In the figure, # 21- #
32 indicates a step.

In step # 21, it is checked whether or not there is a CD creation request from the client PC. Client P
Upon receiving the CD creation request from C, the process proceeds to step # 22, and it is checked whether data transmission from the client PC has been confirmed. When data transmission from the client PC is confirmed, in step # 23, a CD-R / RW format is created based on the received data.
At step # 24, one of the first to third CD-R / RW devices 2a to 2c is instructed to start writing data.

Proceeding to step # 25, it is checked whether a reception error has occurred during data writing. If a reception error has occurred, the valid part of the already received data is determined in step # 26 (the invention of claim 2). At step # 27, one of the first to third CD-R / RW devices 2a to 2c specified previously is instructed to close the write session. Proceed to step # 28, and among the received data,
A user data management unit having logical consistency with the portion determined to be valid and the data up to the previous session is created (the invention of claim 3).

In the next step # 29, an instruction is given to the previous CD-R / RW device (one of 2a to 2c) to write the created user data management section (the invention of claim 4). ). In the next step # 30, the previous CD-R
/ RW device (one of 2a to 2c)
Instructing to close the write session, FIG.
Ends the flow. Also, as a result of the determination in the previous step # 25, if no reception error has occurred during the data writing, the process proceeds to step # 30, where the previous CD-R /
The RW device (one of 2a to 2c) is instructed to close the write session, and the flow of FIG. 4 ends.

On the other hand, as a result of the judgment in the previous step # 22, if data transmission from the client PC is not confirmed, the process proceeds to step # 31, and it is judged whether or not another process is performed. If another process is to be performed, the process proceeds to step # 32, another process is performed, and the flow of FIG. 4 ends. If it is determined in step # 31 that another process is not to be performed, the process returns to step # 22 again to check whether data transmission from the client PC has been confirmed. Through the processing of steps # 21 to # 32,
When the output from the client PC is interrupted, the valid portion of the user data portion already obtained in the network-compatible CD creation system is automatically determined (the invention of claim 2), and thereafter, the valid portion is determined. A user data management unit for managing the user data and the user data up to the previous session is created (the invention of claim 3), and thereafter, only the created user data management unit is added to the next session. (The invention of claim 4) is realized.

[0027]

According to the network-compatible CD creation system of the present invention, when a plurality of users simultaneously create a CD, a plurality of CDs are output regardless of a change in the amount of data output from each user's client personal computer.
Provide means that can be created at the same time. Therefore, even if one of the plurality of users is creating a CD, another user can create a CD at the same time, and utilization efficiency is improved.

According to a second aspect of the present invention, in the CD creating system according to the first aspect, during the writing of the data section after the data management section is first written, the trouble of the user's client PC causes the trouble of the user. Even when the data output from the client PC is interrupted, the valid part of the data already output is automatically determined. Therefore, the CD of claim 1
In addition to the effects of the creation system, only the valid data part can be reflected in the data management part.

According to a third aspect of the present invention, in the CD creating system according to the second aspect, during writing of the data portion after the data management portion is first written, the trouble of the user's client PC causes the trouble of the user. When the data output from the client PC is interrupted, the valid part of the data already output is automatically determined, and then the data of the valid part and the data up to the previous session are managed. A data management section is created. Therefore, in addition to the effect of the CD creation system according to the second aspect, it is possible to refer to the valid data of the entire disk until the data output from the client PC is interrupted.

According to a fourth aspect of the present invention, in the CD creating system according to the third aspect, data output from the user's client PC is interrupted,
After automatically determining the valid part of the data that has been output so far, create a data management unit for managing the valid part data and data up to the previous session, and then create the data Only the management department will be added to the next session. Therefore, the CD of claim 3
In addition to the effects of the creation system, it is possible to create a CD readable by the OS while maintaining logical consistency between the latest information of the data management unit and the data unit.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an example of an embodiment of a main part configuration of a network-compatible CD creation system of the present invention.

FIG. 2 is a flowchart showing a main processing flow when a plurality of users simultaneously create a CD in the network-compatible CD creation system of the present invention.

FIG. 3 is a flowchart showing a main processing flow when a plurality of users simultaneously create a CD in the network-compatible CD creation system of the present invention.

FIG. 4 is a flowchart showing a main processing flow when data is interrupted halfway during transmission from a client PC in the network-compatible CD creation system of the present invention.

FIG. 5 shows a network compatible CD creation system.
It is a block diagram showing an example of the schematic structure.

[Explanation of symbols]

1... CPU, 2a to 2c... First to third CD-Rs
/ RW device, 3 RAM, 4 program storage unit, 5 temporary file / received data storage unit, 6 control device, 7 network connection device

Claims (4)

[Claims] 1. A CD-R (write-once type) or a CD-RW
Using a (rewritable) disc, multiple users
In a network system provided with CD creating means capable of creating D, when a plurality of users simultaneously create a CD, a plurality of CDs are created regardless of a change in the amount of data output from each user's client personal computer. A network-compatible CD creation system using a CD-R or CD-RW disc, characterized by comprising means for simultaneously creating a CD. 2. The network-capable CD creation system according to claim 1, wherein when a plurality or a single user stops producing data during a CD creation due to a trouble in a user's client personal computer, the data already obtained. 2. A network-compatible CD creation system using a CD-R or CD-RW disc, comprising a valid data judging means for judging an effective part of the CD. 3. The network-compatible CD creation system according to claim 2, wherein when data output is interrupted due to a trouble in the user's client personal computer, the data up to the valid part determined by the valid data determining means and the previous data are output. A network-compatible CD creation system using a CD-R / RW disc, comprising a data management unit creation means for creating a data management unit for managing data up to a session. 4. The network-compatible CD creation system according to claim 3, wherein when data output is interrupted due to a trouble in the user's client personal computer, only the data management unit created by the data management unit creation unit is transferred to the next session. A network-compatible CD creation system using a CD-R / RW disc, characterized by comprising an additional recording means for performing additional recording.