JPH08321159A - Data recording apparatus - Google Patents

Abstract

PURPOSE: To provide a data recording apparatus which can prevent data from being rewritten erroneously to the TOC of a DVD (an optical disk recording medium). CONSTITUTION: A data conversion circuit 24 converts change data S22 to be input from a terminal device 22 into the data structure of a TOC. A data replacement circuit 12 replaces data in the manufacture entry region of the TOC contained in a data stream S10' by the change data S22 so as to generate a data stream S12. The data stream S12 adds an error-deleting code, it performs a scrambling operation, it adds an error-correcting code, and it modulates data sequentially by a data modulation circuit 20 which contains an error-deleting- code addition circuit 14, a scrambling application circuit 18, an error-correcting- code addition circuit 16 and an EFMP modulation circuit 15. The data stream is recorded on a DVD 40 by a recording apparatus 30.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a TOC (Table Of Contents) used for inquiring recorded data such as audio and video.
The present invention relates to a data recording device whose contents can be changed.

[0002]

2. Description of the Related Art Compact discs (CDs) record data such as music and the like, as well as data called TOC, which are used for searching recorded data and referring to the contents. This TOC contains data necessary for selecting music, etc., and plays an important role in control processing of a CD system such as a CD player.

[0003]

[Problems to be Solved by the Invention] Currently, the sound of movies, etc.
Video data (AV data) is compression-coded by the MPEG method or the like, and an optical disc recording medium (DVD; Digital
Digital video disc (D
The VD) system has been proposed. Also in this DVD system, it is planned to record data similar to the TOC of a CD, which is used for retrieval / inquiry of recorded AV data and the like, on a DVD together with the AV data and the like. For example, in the TOC of a CD that records audio data such as music,
Movement number data (TNO), index data (X), data showing elapsed time in movement (minutes; MIN,
Seconds; SEC and frame number; FRAME) and data indicating absolute time (minutes; AMIN, seconds; ASEC and frame number; AFRAME) are included. Since these data are directly related to the control process of the CD system, if they are wrong, they will seriously impair the control process of the CD system. Therefore, rewriting is generally not allowed.

However, since it is expected that the DVD system will require a higher level of search / query processing than the CD system, data corresponding to each data included in the TOC of the CD system is recorded on the DVD. The specifications are such that data indicating the creator / publisher of movies, data indicating the manufacturer of the DVD, and data indicating the date of manufacture of the DVD are further recorded (hereinafter, search / inquiry will be performed even in the DVD system. TO the data used
C)). Once created, no changes are needed,
Generally, unlike the data corresponding to the data included in the TOC of the CD, which is not allowed to be rewritten, the data indicating the manufacturing date of the DVD and the like are required to be rewritable at the time of manufacturing the DVD.

The present invention has been made in view of the above-mentioned problems of the prior art, and D included in the TOC of DVD.
An object of the present invention is to provide a data recording device capable of rewriting data indicating a VD manufacturing date and the like when recording data on a DVD. Further, the present invention enables rewriting of data indicating the manufacturing date of the DVD included in the TOC of the DVD, and the CD included in the data included in the TOC of the DVD.
It is an object of the present invention to provide a data recording device capable of preventing erroneous data rewriting on a portion corresponding to the TOC data.

[0006]

In order to achieve the above-mentioned object, a data recording apparatus according to the present invention comprises one or more predetermined record data and inquiry data used to inquire the contents of each of the record data. A data recording device for recording a data stream including a data on a predetermined optical recording medium, the change data accepting means for accepting change data indicating changes to the inquiry data, and the inquiry data for the change data accepted. Inquiry data changing means for changing the inquiry data contained in the data stream to the changed inquiry data, and the optical recording medium for changing the inquiry data in the data stream. And recording means for recording.

[0007] Preferably, the inquiry data includes a variable portion which can be changed when recording on the optical recording medium, and the change data accepting means changes the change portion of the inquiry data. Accepting data, the inquiry data modifying means modifies the accepted modification data to generate a variable portion of the inquiry data, and the data rewriting means only alters the variable portion of the inquiry data included in the data stream. , And rewrite it with a variable part of the generated inquiry data.

[0008] Preferably, the inquiry data rewriting means is
Position signal generating means for generating a position signal indicating a position of a variable portion of the inquiry data of the data stream, and a variable portion of the inquiry data of the data stream for generating the position signal of the inquiry data of the data stream based on the position signal. And a substitution means for substituting the variable portion.

Preferably, the change data receiving means receives change data indicating the contents of a variable portion added to the inquiry data, and the inquiry data changing means changes the received change data to make the inquiry. And a timing signal generating means for generating a variable portion of data, the data rewriting means for generating a timing signal indicating a timing for adding the variable portion to the inquiry data of the data stream, and the data rewriting means for generating based on the timing signal. Adding means for adding a variable portion of the inquiry data to the inquiry data of the data stream, and the data stream for a time corresponding to the data amount of the variable portion of the inquiry data added to the inquiry data of the data stream Delaying means for delaying and supplying to the recording means.

[0010]

The data recording apparatus according to the present invention stores a data stream containing one or more pieces of recording data such as AV data and a TOC (inquiry data) used for searching each recording data or inquiring about the contents of the DVD (optical). Recording medium), the change data accepting means is a change content for the inquiry data, that is,
The change data indicating the manufacturing date of the DVD described above is accepted. The inquiry data changing unit extracts the inquiry data from the data stream, for example, and changes the data of the corresponding portion of the TOC according to the contents of the changed data received by the changed data receiving unit.

The data rewriting means rewrites the inquiry data included in the data stream by replacing it with the changed inquiry data. The recording means data-modulates the data stream in which the inquiry data is rewritten, further modulates the laser beam using the data-modulated data stream, and retrieves the recorded data such as AV data and the recorded data.
The inquiry data used for content inquiry is recorded on the DVD.

[0012]

First Embodiment Hereinafter, the first embodiment of the data recording apparatus according to the present invention will be described.
An example will be described. FIG. 1 is a diagram showing the configuration of a data recording device 8 according to the present invention in the first embodiment. FIG. 2 is a diagram showing an example of the structure of the TOC recorded on the DVD 40 shown in FIG. As shown in FIG. 1, the data recording device 8 includes a data reproducing device 10 and a TOC detection circuit 8.
0, a data changing circuit 82, a data replacing circuit 84, a terminal device 22, a data modulating circuit (DMOD) 20, and a recording device 30. The recording device 30 includes a laser modulating circuit (LMOD) 32 and a disk drive system 34. To be done. The data recording device 8 is, for example, a device for manufacturing a master disc of a DVD, and these components make it possible to transfer the data stream S10 to a digital video disc (DV).
D) At the time of storing in the data stream 40, of the TOC included in the data stream S10, the data indicating the manufacturing date of the DVD and the like are changed.

The data reproducing device 10 is, for example, a device such as a video tape recorder, and has recording data such as edited AV data (so-called "complete package data") such as one or a plurality of movies, and AV data, respectively. The data stream including the TOC used for the search, content inquiry, etc. is reproduced from the video tape or the like and output to the TOC detection circuit 80 and the data replacement circuit 84 as the data stream S10.

The TOC included in the data stream has a data structure as shown in, for example, FIG.
Has the same sector structure as other data in
And a user area following the Header. Among them, TOC data is recorded on the DVD 40 including a system identification, a disc entry, a publisher entry, a track entry, etc. in the user area.

Of these data included in the TOC of the DVD, data other than the manufacture entry area is data such as the system type, the address data amount, and the layer identification, and the data recording device 8 cannot be changed. The manufacturing entry area is the T of a conventional CD.
The data not included in the OC includes data such as the identification code (ID) of the manufacturing apparatus and the manufacturing date as the manufacturer-related data, and a change in the data recording apparatus 8 is required.

The TOC detection circuit 80 detects the TOC from the data stream, extracts the TOC also as a timing signal, and outputs it to the data change circuit 82. The terminal device 22 is, for example, a personal computer or the like, and displays the content of the TOC input via the data change circuit 82 to the operator of the data recording device 8 and inputs it by the operator of the data recording device 8. The change data indicating the changed contents of the TOC is accepted and output to the data change circuit 82 as change data S22 via a predetermined interface such as RS232C. The data change circuit 82 uses the change data S22 input from the terminal device 22.
Change the TOC content based on the
82 is output to the data replacement circuit 84 in synchronization with the timing signal. That is, the terminal device 22 and the data change circuit 82 work together to operate as an editor of the TOC.

The data replacement circuit 84 changes only the TOC data in the data stream S10. TOC data S82
And output to the data modulation circuit 20 as a data stream S84. The data modulation circuit 20 adds EDC to the data stream S84 for each sector,
After scrambling and adding error correction code, D
The EFMP modulation suitable for recording on the VD 40 is selected and used so as to reduce the DC component, and is output to the laser modulation circuit 32 as a modulation signal S20. The disk drive system 34 rotationally drives the DVD 40. The laser modulation circuit 32 generates a laser beam modulated by the modulation signal S20 input from the data modulation circuit 20 to generate a DV signal.
D40 is irradiated and the modulation signal S20 is recorded on the DVD 40.

Of the above-mentioned components of the data recording device 8, the terminal device 22 corresponds to the changed data receiving means according to the present invention, and the data changing circuit 82 corresponds to the inquiry data changing means according to the present invention. The data replacement circuit 84 corresponds to the data rewriting means according to the present invention, and the data modulation circuit 20 and the recording device 30 correspond to the recording means according to the present invention.

The operation of the data recording device 8 will be described below. The TOC detection circuit 80 extracts the TOC included in the data stream S10 input from the data reproduction device 10. The TOC detection circuit 80 and the terminal device 22 are
The contents of TOC extracted by the OC detection circuit 80 are
The operator of the data recording device 8 edits (edits) based on the contents of the change data S22 input using the terminal device 22, and outputs the edited TOC to the data change circuit 82 as the change data S82.

The data replacement circuit 84 replaces the TOC data in the data stream S10 with the modified TOC data S82 and outputs it as the data stream S84 to the data modulation circuit 20. In the data modulation circuit 20 and the recording device 30, the data modulation circuit 20 adds an error detection code, scrambles, and adds an error correction code to the data stream S84 input from the data replacement circuit 84 to reduce the DC component. The data stream S is subjected to EFM modulation with DSV control selected to be
20 and outputs the data stream S2 to the DVD 40.
Record as 0.

By configuring the data recording device 8 as described above, it becomes possible to easily manufacture the DVD 40 by changing the contents of the manufacturing entry area of the TOC at the manufacturing site. The data reproducing device 10
Is not a video tape recorder, but is a disk device for reproducing a magneto-optical disk or a hard disk on which the data stream S10 is recorded, or a receiving device for receiving the data stream S10 transmitted via a transmission path. May be. The recording data included in the data stream S10 is not limited to AV data,
For example, it may be data used for computer processing.

[0022]

[Second Embodiment] A second embodiment of the present invention will be described below.
The data recording device 8 (FIG. 1) shown in the first embodiment is configured such that the data changing circuit 82 and the terminal device 22 edit the TOC data to change the contents. Therefore, according to the data recording device 8, the contents of areas other than the manufacturing entry area of the TOC data, which are originally not required to be changed and are not allowed to be changed, can be changed due to an operation error of the operator or the like. There is a nature. When the data stream S84 in which the area other than the manufacturing entry area of the TOC data is erroneously changed is recorded on the DVD 40, there is a possibility of causing a fatal malfunction that the reproducing apparatus for reproducing the recorded data from the DVD 40 does not operate normally. is there. Data recording apparatus 1 described in the second embodiment
Is an improvement to the data recording device 8 for preventing the occurrence of such a defect.

FIG. 3 is a diagram showing the configuration of the data recording apparatus 1 according to the present invention in the second embodiment. Note that FIG.
Of the constituent parts of the data recording apparatus 1 shown in FIG. 3, the same parts as those of the data recording apparatus 8 shown in FIG. 1 in the first embodiment are designated by the same reference numerals. As shown in FIG. 3, the data recording device 1 includes a data reproducing device 10, a data replacing circuit 12, an error detecting code adding circuit 14, an error correcting code adding circuit 16, a scramble applying circuit 18, and a DS.
It is composed of a data modulation circuit 20, which is composed of an EFMP modulation circuit 15 including a U control circuit, a terminal device 22, a data conversion circuit 24, and a recording device 30, which the operator inputs using the terminal device 22. Only the contents of the TOC manufacture entry area are changed based on the change data.

Of the change data S22 input from the terminal device 22, the data conversion circuit 24 is only the TO related to the contents of the manufacture entry area shown in FIG.
The data is converted into the data structure of C and output as converted data S24 to the data replacement circuit 12. Data replacement circuit 12
Then, the manufacture entry area of the TOC included in the data stream S10 ′ includes data of a predetermined data length in advance, and only the data corresponding to the change data S22 among the data in the manufacture entry area is stored. The error detection code addition circuit 1 in the data modulation circuit 20 is replaced with the changed data S22 to form the data stream S12.
Output to 4. The data replacement circuit 12 does not replace the data in the manufacturing entry area of the TOC included in the data stream S10 ′, which the operator has not requested to change.

The error detection code adding circuit 14 adds an error detection code to the data stream S12, and the result S1
4 is output to the scramble applying circuit 18.
The scramble applying circuit 18 uses the data stream S14.
Is scrambled and output to the error correction addition circuit 16 as a data stream S18. The error correction code adding circuit 16 performs two types of error correction coding on the data stream S18 based on the Reed-Solomon code, adds error correction to the data stream S18, and adds the error correction to the data stream S18.
It is output to the EFMP modulation circuit 15 as 16.

The EFMP modulation circuit 15 performs two-system EFMP modulation on the input data stream S16 so that the final output data string has less DC components.
The data values are compared and selected, and are always output to the recording device 30 after the LMOD 32 as the EFMP-modulated data stream S20 in which the output DC component value is small.

The operation of the data recording device 1 will be described below. The data conversion circuit 24 converts the modified data S22 input from the terminal device 22 into a TOC data structure and outputs the TOC data structure to the data replacement circuit 12. Data replacement circuit 1
Among the data in the TOC manufacture entry area included in the data stream S10 ', only the data corresponding to the change data S22 is replaced with the change data S22, and the data 2 is output as the data stream S12. The data stream S12 includes an error detection code addition circuit 14, a scramble application circuit 18, an error correction code addition circuit 16, and an EF.
The MP modulation circuit 15 sequentially performs error detection signal addition, scramble, error correction code addition, and data modulation, and the recording device 30 records the DVD 40.

By configuring the data recording device 1 as described above, it is possible to prevent erroneous changes to the data in the area other than the TOC manufacture entry area. It should be noted that the terminal device 22 may be configured such that the data in the manufacture entry area that can be changed is displayed in a menu format screen and the operator changes the data in the manufacture entry area according to the displayed menu. . By displaying the screen of such a menu format on the terminal device 22, the operability of the data recording device 1 can be improved and erroneous input of data can be prevented.

Further, for example, only a predetermined portion of the data in the manufacturing entry area of the TOC included in the data stream S10 ', for example only the manufacturing date, is set as dummy data, and the MD is used in the data recording device 1.
It may be configured such that only the data portion can be changed and the other portions of the manufacturing entry area are not changed. The data recording device 1 can also be modified as shown as a modification of the data recording device 8 in the first embodiment.

[0030]

Third Embodiment A third embodiment of the present invention will be described below.
FIG. 4 is a diagram showing the configuration of the data recording device 5 according to the present invention in the third embodiment. The first embodiment and the second embodiment among the components of the data recording device 5 shown in FIG.
The same components as those of the data recording devices 8 and 1 (FIGS. 1 and 3) shown in the embodiment of FIG. As shown in FIG. 4, the data recording device 5 includes a data reproducing device 10, a terminal device 50, and a memory circuit (MEM) 5.
2, data switching circuit 54, timing circuit 56, data conversion circuit 24, data modulation circuit 58, and recording device 30.
And is configured to change the manufacture entry area of the TOC included in the data stream S10 ′ output from the data reproducing apparatus 10, similarly to the data recording apparatus 1 shown in the second embodiment. ing.

The terminal device 50 performs the same operation as the terminal device 22 of the data recording devices 8 and 1 (FIGS. 1 and 3) shown in the first and second embodiments, and changes data S50a.
(The content is the same as the change data S22 of the terminal device 22) is output to the data conversion circuit 24, and the portion corresponding to the change data S50a in the manufacture entry area of the TOC, that is, the change by the data recording device 5 The changed portion data S50b indicating the portion to be processed is output to the timing circuit 56.

The memory circuit 52 stores the change data S24 obtained by converting the change data S50a into the TOC data structure (FIG. 2) by the data conversion circuit 24. Timing circuit 5
6 detects the TOC from the data stream S10 ′,
Based on the detected position of the TOC and the changed portion data S50b input from the terminal device 50, a timing signal S56 indicating the timing of the data replacement operation in the data switching circuit 54 is generated and output to the data switching circuit 54.

The data switching circuit 54 has a timing signal S.
According to 56, the change data S24 stored in the memory circuit 52 is read as the change data S52, and like the data replacement circuit 12 of the data recording devices 8 and 1, the manufacture entry area of the TOC included in the data stream S10 ′ is read. Of the data, only the data corresponding to the modified data S52 is replaced with the modified data S52 and output as the data stream S54 to the data modulation circuit 58.
The data modulation circuit 58 is the data modulation circuit 20 including the error detection code addition circuit 14, the scramble application circuit 18, the error correction code addition circuit 16 and the EFMP modulation circuit 15 of the data recording devices 8 and 1, and the data stream S5.
4 error detection code addition, scrambling, error correction code addition, and EFMP data modulation are performed, and the data stream S58 is output to the recording device 30.

The operation of the data recording device 5 will be described below. The data conversion circuit 24 converts the modification data S50a input from the terminal device 50 into a TOC data structure and outputs the modification data S24 to the memory circuit 52, and the memory circuit 52 stores the modification data S24. The timing circuit 56 outputs the timing signal S5 based on the TOC detected from the data stream S10 ′ input from the data reproduction device 10 and the changed portion data S50b.
6 is generated.

The data switching circuit 54 has a timing signal S.
According to 56, T included in the data stream S10 ′
Of the data in the OC manufacturer entry area, only the data corresponding to the change data S52 is changed data S52.
Replace with. The data modulation circuit 58 performs error detection code addition, scramble, error correction code addition, and EFMP data modulation on the data stream S54, and the recording device 3
0 records the data stream S58 input from the data modulation circuit 58 on the DVD 40.

The TOC of the data stream S10 '
If the part to be changed is predetermined among the data included in the manufacture entry area of the above, the timing circuit 56 is configured to generate the timing signal S56 without using the changed part data S50b. Is possible. Further, the data recording device 5 can be modified as shown as a modification of the data recording devices 8 and 1 in the first and second embodiments.

[0037]

[Fourth Embodiment] A fourth embodiment of the present invention will be described below.
The data recording apparatus 6 according to the present invention described in the fourth embodiment corresponds to the case where the TOC of the data stream S10 ″ reproduced by the data reproducing apparatus 10 does not include the manufacturing entry area or a part thereof (FIG. 2). In this case, the data of the manufacture entry area or a part thereof is generated from the change data S50a input by the operator using the terminal device 50, and the data stream S
It is configured to insert the missing data at a predetermined position of 10 ".

FIG. 5 is a diagram showing the configuration of a data recording device 6 according to the present invention in the fourth embodiment. Note that FIG.
Of the constituent parts of the data recording device 6 shown in FIG.
The same components as those of the data recording devices 8, 1, 5 (FIGS. 1, 3 and 4) shown in the embodiment of FIG. As shown in FIG. 5, the data recording device 6
Is the data reproduction device 10, the timing circuit 60, the time delay circuit (TDELAY) 66, the terminal device 50, the data conversion circuit 24, the TOC data rewriting circuit 68, the first switch circuit (SW1) 62, the second switch circuit ( SW2)
64, a data modulation circuit 58 and a recording device 30.

Similar to the timing circuit 56 of the data recording device 5 (FIG. 4) shown in the second embodiment, the timing circuit 60 detects and detects the TOC from the data stream S10 "reproduced by the data reproducing device 10. Changed TOC position and changed portion data S5 input from the terminal device 50
Based on 0b, the switch circuit 62 is controlled via the switch control signal C62 to generate the timing signal S60 indicating the operation timing of the TOC data rewriting circuit 68 and output it to the TOC data rewriting circuit 68. The switch circuit 64 can be controlled by the switch control signal C62.

The switch circuit 62 is the timing circuit 60.
According to the switch control signal C62 input from the data stream S10 ″, the output terminal b side is selected before the data of the manufacturing entry area of the TOC or a part thereof which is lacking in the data stream S10 ″ is inserted. From the input terminal d of the switch circuit 64 and inserting the missing data signal,
The output terminal a side is selected to output the data stream S10 ″ to the time delay circuit 66. The time delay circuit 66.
Is a TOC data rewriting circuit 68 and a switch circuit 64.
The data stream S10 ″ is delayed by a time corresponding to the time length of the manufacture entry area of the missing data signal TOC or a part thereof which is inserted into the data stream S10 ″ by the input, and is input to the switch circuit 64 as delay data S66. Output to terminal c.

The TOC data rewriting circuit 68 should insert into the data stream S10 "the change data S24 obtained by converting the change data S50a into the TOC data structure (FIG. 2) by the data converting circuit 24 based on the timing signal S60. The change control signal C is output to the input terminal e of the switch circuit 64 as the change data S68 at a timing.
The switch circuit 64 is controlled via 64. The timing circuit 60 may be configured to control the switch circuit 64.

The switch circuit 64 has a switch control signal C.
According to 64, the input terminal d side is selected and the data stream S10 ″ is output as it is before the missing data of the manufacturing entry area of the TOC or a part thereof is inserted in the data stream S10 ″, and In order to insert the changed data signal, while the TOC data rewriting circuit 68 is outputting the change data S68, the input terminal e side is selected and the change data S68 is output. After the necessary data signal is inserted, the input terminal c side is selected and the delay data S66 is output. Therefore, the data stream S64 outputs to the data modulation circuit 58 as a data stream including the complete TOC data in which the data of the missing manufacturing entry area or a part thereof is inserted in the data stream S10 ″.

The operation of the data recording device 6 will be described below. The data reproducing device 10 uses the TO in the data stream.
A data stream S10 ″ having only a portion that does not rewrite corresponding to the TOC of the CD as C and does not have a portion that requires rewriting in the manufacture entry area is reproduced, and is reproduced to the timing circuit 60 and the switch circuit 62. The data conversion circuit 24 converts the change data S50a input from the terminal device 50 into the TOC data structure of the portion to be inserted in the data stream, and outputs it as the change data S24 to the TOC data rewriting circuit 68. To do.

Before the data to be rewritten in the manufacture entry area of the TOC is inserted in the data stream S10 ", the switch circuit 62 is operated by the timing circuit 6.
The output terminal b side is selected according to the control of 0, the switch circuit 64 selects the input terminal d side according to the control of the TOC data rewriting circuit 68, and the data stream S10 ″ is directly input to the data modulation circuit 58. TOC data rewriting The circuit 68 outputs the modified data S68 to the input terminal e of the switch circuit 64, and outputs the modified data S68 to the data stream S10 ″.
While the change data S58 is being inserted into the rewritten portion of the manufacture entry area of C, the switch circuit 62 selects the output terminal a side and outputs the data stream S10 ″ to the time delay circuit 66. The input terminal e side is selected and the modified data S68 is input to the data modulation circuit 58.

Even after the data has been inserted into the rewritten portion of the TOC manufacture entry area in the data stream S10 ", the switch circuit 62 selects the output terminal a side and outputs the data stream S10" to the time delay circuit 66. And continue to output. On the other hand, the switch circuit 64 selects the input terminal c side, and the delay data S66 outputs the delay data S66.
8 is input. Data modulation circuit 58 and recording device 3
0 performs predetermined processing on the data stream S64 output from the switch circuit 64 and records it on the DVD 40.

By configuring the data recording device 6 as described above, it corresponds to the TOC of the CD among the TOCs. It is possible to insert the data in the manufacturing entry area that needs to be changed into the data stream that includes only the data signal that does not need to be changed when the DVD 40 is manufactured. Moreover, after the data of the TOC manufacture entry area is inserted in the data stream S10 ″, the delay data S66 delayed by the time corresponding to the time length of the manufacture entry area is recorded in the data stream S10 ″ on the DVD 40. Is inserted, so the inserted T
The recorded data is not lost due to overlapping with the data in the OC manufacturer entry area. The data recording device 6 can also be modified as shown as a modification of the data recording devices 8, 1 and 5 in the first to third embodiments.

[0047]

As described above, according to the data recording apparatus of the present invention, the D included in a part of the TOC of the DVD.
The data indicating the manufacturing date of the VD and the like can be rewritten when the data is recorded on the DVD. Further, according to the data recording device of the present invention, the DV included in the TOC of the DVD
While enabling the rewriting of the data indicating the manufacturing date of D,
It is possible to prevent erroneous rewriting of data included in the TOC of the DVD and corresponding to the TOC data of the CD.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a data recording device according to the present invention in a first embodiment.

2 is a diagram illustrating a structure with a TOC recorded on the DVD shown in FIG. 1. FIG.

FIG. 3 is a diagram showing a configuration of a data recording device according to the present invention in a second embodiment.

FIG. 4 is a diagram showing a configuration of a data recording device according to the present invention in a third embodiment.

FIG. 5 is a diagram showing a configuration of a data recording device according to the present invention in a fourth embodiment.

[Explanation of symbols]

8, 1, 5, 6 ... Data recording device, 10 ... Data reproducing device, 12 ... Data replacement circuit, 14 ... Error detection code addition circuit, 15 ... EFMP modulation circuit, 16 ... Error correction code addition circuit, 18 ... Scramble application Circuit, 20 ... Data modulation circuit, 22, 50 ... Terminal device, 24 ... Data conversion circuit,
30 ... Recording device, 32 ... Laser modulation circuit, 34 ... Disk drive system, 40 ... DVD, 80 ... TOC detection circuit, 8
2 ... Data changing circuit, 84 ... Data replacing circuit, 52 ... Memory circuit, 54 ... Data switching circuit, 56, 60 ... Timing circuit, 58 ... Data modulating circuit, 62, 64 ... Switch circuit, 66 ... Time delay circuit, 68 ... TOC data rewriting circuit

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Claims (4)

[Claims] 1. A data recording device for recording a data stream including one or more predetermined recording data and inquiry data used for inquiry of contents of each of the recording data on a predetermined optical recording medium, wherein: Change data accepting means for accepting change data indicating the details of change to the inquiry data, inquiry data changing means for changing the inquiry data according to the contents of the accepted change data, and the inquiry data included in the data stream. A data recording device comprising: a data rewriting unit that rewrites the changed inquiry data; and a recording unit that records the data stream in which the inquiry data has been rewritten on the optical recording medium. 2. The inquiry data includes a variable portion which is allowed to be changed when recording on the optical recording medium, and the change data accepting means outputs change data indicating contents of changes to the variable portion of the inquiry data. Receiving, the inquiry data changing unit changes the received change data to generate a variable portion of the inquiry data, and the data rewriting unit generates only a variable portion of the inquiry data included in the data stream. The data recording device according to claim 1, wherein the inquiry data is rewritten to a variable portion. 3. The inquiry data rewriting means generates position signal indicating a position of a variable portion of the inquiry data of the data stream, and the inquiry of the data stream based on the position signal. The data recording apparatus according to claim 2, further comprising a replacement unit that replaces a variable portion of data with a variable portion of the generated inquiry data. 4. The change data accepting means accepts change data indicating the contents of a variable portion added to the inquiry data, and the inquiry data changing means changes the accepted change data to change the inquiry data. A variable portion, the data rewriting means generates a timing signal indicating a timing for adding a variable portion to the inquiry data of the data stream; and the inquiry generated based on the timing signal. Adding means for adding a variable portion of data to the inquiry data of the data stream; and delaying the data stream by a time corresponding to the amount of data of the variable portion of the inquiry data added to the inquiry data of the data stream. The delay means for supplying the recording means to the recording means. Data recording device.