JP2001176190A - Digital data editing method and device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To enable editing of digital data without impairing the rights of a copyright holder. An area in which program A data recorded on a medium a1 is automatically divided into areas A1 to A4. Medium a
The data A1 of the program A obtained by reproducing from the program 1 is recorded on the medium b2 via the data transfer unit 6. At this time, the data transfer confirmation unit 7 monitors the data transfer operation state and the amount of transfer data. Then, after confirming that all the data of the program A1 has been recorded on the medium b2, the control section controls the erasing section b9 to erase all the data of the program A1 from the medium a1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for editing digital data, and more particularly to an editing method and an apparatus for editing digital data while protecting copyright.

[0002]

2. Description of the Related Art At present, digital broadcasting services for broadcasting video and audio signals as digital data have already been started. Digital broadcasting using satellites has already been started in the United States, Japan, Europe, and other countries around the world, and terrestrial broadcasting has also started in the United States. In addition, D-VHS recording / reproducing devices capable of recording and saving digital data transmitted by digital broadcasting as they are are already on the market. A device capable of recording a program broadcasted by digital broadcasting or the like as digital data (for example, D-VHS,
(DVD-RAM, etc.) makes it possible to make a copy without any deterioration.
Therefore, various copy protections have been devised and implemented. As a device for preventing recording of digital data in which copying is prohibited or restricted, for example, Japanese Patent Application Laid-Open No. H11-1961
No. 15 is known. Also, in order to automatically delete the original information copied by the dubbing process, when performing the dubbing process of the information from the information recording medium to another information recording medium, the dubbing process is performed. For example, Japanese Patent Application Laid-Open No. H11-288577 discloses that one or a plurality of information recording pieces are deleted or the management information is changed so that the information recording pieces cannot be reproduced. Furthermore, CGMS (Copy Generation Ma)
There is a technique called “nagement system”, which manages the generation of copies (copy) and controls the number of copies (copy).

[0003]

In the above-mentioned CGMS, even if "one-time duplication is possible", any number of child tapes can be created if there is a parent tape. In addition, when "reproduction is not permitted", user convenience is greatly impaired. For example, when a plurality of series programs are recorded on one tape (disk) in an answering machine or the like, there has been a problem that editing work such as putting together on a tape for each series later cannot be performed at all.

[0004] The present invention has been made to solve the above problems, and has as its object to provide a digital data editing method and apparatus capable of editing digital data without impairing the rights of the copyright holder. And

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a digital data editing method for editing digital data whose copy is restricted on another recording medium, wherein a transfer range designated by a user is specified. Is automatically divided into a plurality of small areas, and after the data transfer of the small areas is completed, the data of the transfer source is deleted, and the data transfer for each of the small areas and the deletion of the transfer source data are continuously performed.

[0006] According to the above configuration, in the process of editing digital data, the digital data exists only in either the transfer source or the transfer destination. Can be edited.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an overall schematic configuration of a digital data editing apparatus according to the present invention. The medium a1 and the medium b2 are cassette type tapes capable of recording digital data, and can be attached to and detached from the editing apparatus 4 through the medium insertion slot 3. The auxiliary record holding unit 5 is, for example, a hard disk drive unit (hereinafter, referred to as an HDD), and the HDD is fixed to the main body of the editing device 4 so that a user cannot easily remove the HDD. On the medium a1, data of the program A and data of the program B transmitted by digital broadcasting are recorded. Here, the program A is one episode of a certain series program, and the user dubs the data of the program A to the medium b2 in order to collect all the series programs on the medium b2.

This dubbing operation is performed in the editing device 4 as follows. First, the program A is reproduced from the medium a1. The reproduced data of the program A is recorded in the auxiliary recording and holding unit 5 via the data transfer unit 6. The data transfer confirming unit 7 monitors the data transfer operation state and the amount of transferred data, and after confirming that all the data of the program A has been recorded in the auxiliary record holding unit 5, controls the erasing unit a8 to control the program Erase all data in A. At this time, the data of the program A exists only inside the auxiliary record holding unit 5. Next, medium a
1 is taken out from the main body of the editing device 4 and the medium b2 is taken out of the editing device 4
Attach it to the body. This time, the data of the program A is transferred from the auxiliary recording and holding unit 5 to the medium b2 via the data transfer unit 6. The data transfer operation and the transfer data amount are also monitored by the data transfer confirmation unit 7, and after confirming that all the data of the program A has been recorded on the medium b2, the erasing unit b9 is controlled and the auxiliary recording and holding unit 5 All data of program A is deleted. At this time, the data of the program A exists only in the medium b2.

From the viewpoints of ensuring data reliability and preventing user misconduct, it is desirable to provide a mechanism that does not accept instructions from the user to stop recording, take out media, etc. during a series of editing operations. Before erasing the transfer source data, compare the transfer source data with the transferred data, and if there is a mismatch in the comparison result, add a mechanism to perform the data transfer again. It is also desirable to ensure.

The media a1 and b2 are not limited to tapes, but may be optical disks, magneto-optical disks, semiconductor memory cards, or the like. Further, the auxiliary record holding unit 5 is not limited to the HDD, but may be an optical disk, a magneto-optical disk, a semiconductor memory, or the like.

Further, by providing a mechanism for limiting the editing start point that can be set by the user to the vicinity of the beginning of each program data, the user intentionally generates a power failure state or the like and the same data remains on the medium a and the medium b. Is repeated to prevent a fraudulent act of creating a copy of the program A on the medium b.

Here, the details of the data transfer will be described with reference to FIG. FIG. 2 shows an operation flow of data editing in the digital data editing apparatus described in FIG. On the medium a, data of the program A and data of the program B transmitted by digital broadcasting are recorded. Program A
Represents one episode of a certain series program, and it is assumed that the user dubs the data of the program A to the medium b in order to edit the whole series program on the medium b.

First, the area of the medium a where the program A data is recorded is automatically divided into areas A1 to A4. Next, the data in the area A1 is recorded on the medium b while being reproduced from the medium a. After all data in the area A1 of the medium a is recorded on the medium b, the data in the area A1 of the medium a is erased.

As the next step, the area A2 from the medium a
Is recorded on the medium b while reproducing. After all data in the area A2 of the medium a is recorded on the medium b, the data in the area A2 of the medium a is erased.

As the next step, the area A3 from the medium a
Is recorded on the medium b while reproducing. After all the data in the area A3 of the medium a is recorded on the medium b, the data in the area A3 of the medium a is erased.

As the next step, the area A4 from the medium a
Is recorded on the medium b while reproducing. After all the data in the area A4 of the medium a is recorded on the medium b, the data in the area A4 of the medium a is erased.

As described above, by automatically dividing the editing area and performing data transfer and erasing of transfer source data, even if an unexpected situation such as a power failure occurs during the editing operation, the medium a The amount of the same data remaining on the medium b can be suppressed. For example, if a power failure occurs at the end of step (9) in FIG. 2, data remaining on both the medium a and the medium b is limited to the data in the area A4. In FIG. 2, the area division setting of A1, A2, A3, and A4 is completed before the actual data transfer is started, but it is not necessary to stick to this procedure.
First, program A is divided into area A1 and the rest (A2 + A3 + A4)
After the data transfer of the area A1 and the erasure of the transfer source data are completed, the area A2 and the rest (A3 + A4) may be divided. Also, the number of divisions is not limited to four, and as the number of divisions increases, the amount of the same data remaining on the medium a and the medium b can be further suppressed.

When the transfer range specified by the user is automatically divided into a plurality of regions, automatically dividing the transfer range specified by the user into a plurality of regions having a random size and the number of divisions is also required from the viewpoint of preventing fraud. It is suitable. Such an example will be described with reference to FIG. In FIG. 3, when the area of the medium a where the program A data is recorded is divided into A1 to A4,
The sizes of A1, A2, and A3 are controlled so as to be different each time division setting is performed by using a random number generation unit or the like. The size of A4 is determined by the whole area− (A1 + A2 + A3). Therefore, even if editing is performed with the same data amount, it changes each time editing is performed as shown by the division pattern (1) and the division pattern (2) in FIG. After the editing area is divided into unequal sizes in this manner, by performing data transfer and erasing of transfer source data, the operation time required for each step from (3) step to (10) step in FIG. come. Therefore, after starting the editing operation, it becomes difficult for the user to identify which step of the editing operation flow is being executed, and a state in which the power failure state or the like is intentionally generated and the same data remains in the medium a and the medium b is determined. This has the effect of making it extremely difficult to carry out fraudulent acts such as creating. In addition, since the division pattern changes each time editing is performed, (3) step to (10) step
It is also impossible to estimate the operation time required for each step up to. It is needless to say that it is not necessary to limit to four divisions shown in FIG.

Next, a digital data editing apparatus according to a second embodiment of the present invention will be described with reference to FIG. Note that the same reference numerals are given to the same portions in FIGS. 1 and 4 and the description of the same portions is partially omitted. In FIG. 4, a medium a1 and a medium b2 are cassette type tapes on which digital data can be recorded, and can be simultaneously attached to the main body of the digital data editing apparatus 12 from the medium insertion port a10 and the medium insertion port b11. On the medium a1, data of the program A and data of the program B transmitted by digital broadcasting are recorded. The program A is one episode of a certain series program, and the user dubs the data of the program A to the medium b2 in order to edit all the series programs on the medium b.

First, a program A obtained by reproducing from the medium a1
Is recorded on the medium b2 via the data transfer unit 6. At this time, the data transfer confirmation unit 7 monitors the data transfer operation state and the amount of transfer data. And program A
After confirming that all the data of the program A has been recorded on the medium b2, the erasing unit 8 is controlled to erase all the data of the program A from the medium a1. Therefore, at this time, the data of the program A exists only in the medium b2. FIG. 4 shows data transfer from the medium a1 to the medium b2. However, if the data transfer unit 6 is configured to be capable of bidirectional data transfer and an erasing means for the medium b2 is added, the digital data editing apparatus 12 can be edited in any direction between the two media inserted in the main body.

Next, a third embodiment of the digital data editing apparatus according to the present invention will be described with reference to FIG. The medium a1 and the medium b2 are cassette-type tapes on which digital data can be recorded, and have a medium insertion port 16 provided on one side surface of the digital data editing apparatus 18 or 19.
From 17, it can be attached to the digital data editing devices 18, 19. The two digital data editing devices are connected via program data / control command multiplex transmission means 20. The program data / control command multiplex transmission means 20 is a digital interface represented by, for example, 1EE1394, and transmits a control command for controlling the operation of a connected device in addition to information on a program such as an image and a sound. Can be transmitted with.

On the medium a1, data of a program A and data of a program B transmitted by digital broadcasting are recorded. The program A is one episode of a certain series program, and the user dubs the data of the program A to the medium b2 in order to edit all the series programs on the medium b2.

First, the data of the program A is reproduced from the medium a1 by the data reproducing means 21, and the data is transmitted to the control command
The data is input to the reproduction data multiplexing means 22. In the control command / reproduction data multiplexing means 22, the digital data editing device 1
After multiplexing a control command for causing the recording operation to be performed on the reproduction data, the control command is output to the digital data editing device 19 via the program data / control command multiplex transmission means 20.
In the digital data editing device 19, the multiplexed data input from the program data / control command multiplex transmission means 20 is separated into the data of the program A and the control command by the control command / playback data separation means 23, and the recording means 24 The data of the program A is recorded on the medium b2 according to the control command. In the digital data editing apparatus 18, the data transfer operation and the amount of data that has been played back are monitored by the data transfer confirmation unit 7, and it is confirmed that all the data of the program A has been recorded on the medium b2 of the digital data recording / reproducing apparatus 19. After doing
The erasing unit 8 is controlled to erase all data of the program A from the medium a1. At this time, the data of the program A exists only in the medium b2. Therefore, by controlling the recording / reproducing operation of the connection destination device together with the transfer of the reproduced data, it is possible to construct an editing system that cannot create a child tape or a grandchild tape even when two editing devices are used.

In order to prevent user's misconduct in the editing process as much as possible, it is one method to prevent the user from knowing which editing operation is currently being performed. Therefore, a description will be given with reference to FIG. As shown in FIG. 6, a general editing device generally has a display mechanism for displaying a reproduction state and a display mechanism for displaying a recording state in the apparatus main body. For example, when the editing operation shown in FIG. 2 is performed, normally, in each step of (3), (5), (7), and (9), the operation state display mechanism of the recording / reproducing means to which the medium a is mounted indicates “reproduction state”. The operation state display mechanism of the recording / reproducing means to which the medium b is mounted indicates “recording state”.

In each step of (4), (6), (8) and (10), the medium a
Indicates the "recording state" of the recording / reproducing means on which the medium b is mounted, and indicates the "stop state" of the recording / reproducing means on which the medium b is mounted. Therefore, at least during the period of (3), (4), (5), (6), (7), (8), and (9) steps, the operating state display mechanism of the editing device on which the medium a is mounted and the medium b are mounted. The operation state display mechanism of the editing device makes a display in which it is impossible to determine the recording / reproduction / stop as shown in FIG. By performing such a display operation, it becomes difficult for the user to identify which step of the editing operation flow is being executed.
It is possible to suppress the execution of fraudulent acts such as creating a state in which the same data remains.

[0026]

As described above, according to the present invention, the digital data is not duplicated in the process of editing the digital data and exists only in either the transfer source or the transfer destination. Digital data desired by the user can be edited without losing the rights of the user.
Further, by automatically or randomly dividing the area in which digital data is transferred and erased, it is possible to prevent duplication due to an accident such as a power outage or an improper user operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a digital data editing device according to the present invention.

FIG. 2 is a diagram showing an embodiment of an editing operation flow according to the digital data editing method according to the present invention.

FIG. 3 is an explanatory diagram of a case where an editing area is randomly and automatically divided in an editing operation flow according to the embodiment;

FIG. 4 is a block diagram showing another embodiment of the digital data editing device according to the present invention.

FIG. 5 is a block diagram showing another embodiment of the digital data editing apparatus according to the present invention.

FIG. 6 is an explanatory diagram showing an example of an operation mode display mechanism during an editing operation of the digital data editing device according to the present invention.

[Explanation of symbols]

1, 2, ... medium, 3, 10, 11 ... medium insertion port, 4,
12 editing device, 5 auxiliary recording holding unit, 6 data transfer unit, 7 data transfer confirmation unit, 8, 9 erase unit, 21 data reproduction unit, 24 data recording unit

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Claims (5)

[Claims] In a digital data editing method for editing digital data of which copying is restricted on another recording medium, a transfer range designated by a user is automatically divided into a plurality of small areas, and data transfer of the small areas is performed. A digital data editing method, wherein the transfer source data is deleted after completion of the data transfer, and the data transfer for each of the small areas and the deletion of the transfer source data are continuously performed. 2. A digital data editing method for editing digital data of which copy is restricted on another recording medium, wherein a transfer range designated by a user has a random size,
Automatically dividing the data into a number of small areas, deleting the data of the transfer source after the data transfer of the small area is completed, and continuously performing the data transfer and the deletion of the transfer source data for each of the small areas. Digital data editing method. 3. A digital data editing apparatus for editing digital data of which copy is restricted on another recording medium, means for automatically dividing a transfer range of the digital data designated by a user into a plurality of small areas. Auxiliary recording and holding means for temporarily storing the digital data, data transfer control means for controlling the transfer of digital data for each small area to the auxiliary recording and holding means, and digital data for the auxiliary recording and holding means. Means for deleting the digital data of the transfer source whenever transfer of the digital data is performed. 4. A digital data editing apparatus for editing digital data of which copy is restricted on another recording medium, wherein a transfer range designated by a user in said digital data is reduced to a small area of random size and number. Means for automatically dividing, auxiliary record holding means for temporarily storing the digital data, data transfer control means for controlling the transfer of digital data for each small area to the auxiliary record holding means, Means for deleting the digital data of the transfer source whenever digital data is transferred to the holding means. 5. The digital data editing apparatus according to claim 3, wherein information for identifying switching between the digital data transfer operation and the digital data erase operation in the transferred area is not output to the outside.