INFORMATION RECORDING APPARATUS, INFORMATION RECORDING METHOD, INFORMATION RECORD MEDIUM, INFORMATION REPRODUCING APPARATUS, INFORMATION REPRODUCING METHOD, INFORMATION TRANSMITTING APPARATUS, AND INFORMATION TRANSMITTING METHOD

• US 20100067871A1
• Filed: 02/28/2008
• Published: 03/18/2010
• Est. Priority Date: 04/09/2007
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Nakane, Kazuhiko
• Granted Patent: US 8,422,850 B2
• Time in Patent Office: Days
• US Class Current: 386/241
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 2020/1222 ECC block, i.e. a block of error correction encoded symbols which includes all parity data needed for decoding pure error correction aspects G11B20/18
• CPC Class Codes: G11B 2020/1232 sector, i.e. the minimal addressable physical data unit
• CPC Class Codes: G11B 2020/1288 Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
• CPC Class Codes: G11B 2020/1295 wherein the focus is on the read access speed
• CPC Class Codes: G11B 2220/235 Multilayer discs, i.e. multiple recording layers accessed from the same side
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/40 Combinations of multiple record carriers
• CPC Class Codes: G11B 2220/45 Hierarchical combination of record carriers, e.g. HDD for fast access, optical discs for long term storage or tapes for backup
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/329 on a disc [VTOC]

Abstract

An apparatus and a method, which make it possible to collect a plurality of the contents authored for DVD to record easily them on a large-capacity information record medium and to increase a data rate in reproducing the recorded contents, perform the processes of: creating source packets from a disk image file; collecting them to form arrangement units 320; collecting them to form ECC clusters; collecting sectors of the DVD to form a sector group, thereby storing it while bringing it into correspondence with a predetermined number of source packets; adding a control packet to this to form units of conversion; collecting them to bring them into correspondence with an integral number of the arrangement units 320; and storing a cluster-number, at which a leading sector of the sector group of the DVD is stored in the control packet; wherein the source packets are brought into correspondence so that a leading portion of the file system area coincides with both a leading portion of the arrangement unit and a leading portion of the error correction cluster and the disk image file is recorded using units of the length so that the length causes a boundary of the units of conversion to coincide with a boundary of the ECC clusters.

Claims

1. An information recording apparatus for receiving and recording data of a content authored for DVD, wherein the DVD has a data area which includes a lead-in area, a lead-out area and a file system area based on the DVD standard and a user file area, the information recording apparatus comprising:

a hard disk for storing the received data of the content authored for DVD;

an optical disk device for recording the data of the content authored for DVD stored in the hard disk on the DVD or a large-capacity optical disk having larger recording capacity than the DVD; and

a control means for controlling operation of the whole of the information recording apparatus;

wherein the received data of the content authored for DVD is a disk image file, which includes data to be treated as main data in a sector of the DVD and header information of the sector;

wherein the control means

divides the disk image file into packets of a transport stream,

adds an extended packet header to each of the divided packets of the transport stream, thereby forming a source packet as units of data of the large-capacity optical disk,

collects a predetermined number of the source packets, thereby forming an arrangement unit,

collects a predetermined number of the arrangement units, thereby forming an error correction cluster of the large-capacity optical disk,

collects a predetermined number of the sectors of the DVD, thereby forming and storing a sector group while bringing the sector group into correspondence with the predetermined number of the source packets,

adds a control packet to the predetermined number of the source packets corresponding to the sector group, thereby forming units of conversion between the sector group and the source packets,

collects a predetermined number of the units of conversion, thereby bringing them into correspondence with an integral number of the arrangement units, and

stores a cluster-number of the error correction cluster of the large-capacity optical disk, at which a leading sector of the sector group of the DVD is stored, in the control packet; and

wherein in the disk image file containing a leading portion of the file system area of the DVD, the source packets are brought into correspondence so that the leading portion of the file system area coincides with both a leading portion of the arrangement unit and a leading portion of the error correction cluster, and

the disk image file is recorded using a length as a unit, which causes a boundary of the units of conversion to coincide with a boundary of the error correction clusters or data padding is performed as necessary so that an ending portion of the disk image file terminates at the coincided boundaries of the units of conversion and of the error correction clusters.

2. The information recording apparatus according to claim 1, wherein the data to be recorded in each of the lead-in area, the file system area, the user file area, and the lead-out area of the DVD are recorded as an individual disk image file or a set of predetermined collected disk image files.

3. The information recording apparatus according to claim 1, wherein if the data of the content authored for DVD are data on a dual-layer DVD which includes a first recording layer and a second recording layer as information recording layers, the source packets are brought into correspondence so that a leading portion of the data area of the second recording layer coincides with both the leading portion of the arrangement unit and the leading portion of the error correction cluster.

4. The information recording apparatus according to claim 1, wherein the disk image file of the content authored for DVD is caused to include data, to which a predetermined copyright protection scheme for DVD is applied.

5. The information recording apparatus according to claim 1, wherein the data of the disk image file of the content authored for DVD are caused to have a function of performing a protection using a predetermined copyright protection scheme for the large-capacity optical disk.

6. The information recording apparatus according to claim 1, wherein identification information for disabling a user access to data of a part corresponding to the lead-in area of the DVD among data of the disk image file of the content authored for DVD is recorded in the control packet.

13. An information record medium, on which data of a content authored for DVD are being recorded as a disk image file using any one of the information recording apparatus of claim 1.

14. An information reproducing apparatus for reproducing the information record medium of claim 13, which stores a disk image file of the content authored for DVD, wherein the information reproducing apparatus

obtains a sector-number of a leading sector of a sector group being reproduced from the information record medium when the DVD is being played,

obtains a cluster-number of an error correction cluster of the large-capacity optical disk storing the leading sector from the control packet of the sector group, and

calculates a cluster-number of an error correction cluster to be accessed next on the basis of a difference between sector-numbers of a leading sector and a sector to be accessed next and the obtained cluster-number.

15. The information reproducing apparatus according to claim 14, wherein the apparatus disables an unauthorized access from a user when analyzing the control packet and detecting the identification information indicating that a sector of the part of the disk image file is a lead-in area of the DVD from the control packet.

16. An information reproducing method of reproducing the information record medium of claim 13, which stores a disk image file of the content authored for DVD, the information reproducing method comprising the steps of:

obtaining a sector-number of a leading sector of a sector group being reproduced from the information record medium when the DVD is being played; and

obtaining a cluster-number of an error correction cluster of the large-capacity optical disk storing the leading sector from the control packet of the sector group;

wherein a cluster-number of an error correction cluster to be accessed next is calculated on the basis of a difference between sector-numbers of a leading sector and a sector to be accessed next and the obtained cluster-number.

17. The information reproducing method according to claim 16, further comprising a step of disabling an unauthorized access from a user when analyzing the control packet and detecting the identification information indicating that a sector of the part of the disk image file is a lead-in area of the DVD from the control packet.

7. An information recording method for receiving from a content server and recording data of a content authored for DVD, wherein the DVD has a data area which includes a lead-in area, a lead-out area and a file system area based on the DVD standard and a user file area, wherein the information recording method uses an information recording apparatus including a hard disk for storing data of the received content authored for DVD and an optical disk device for recording the data of the content authored for DVD stored in the hard disk on a DVD or a large-capacity optical disk having larger recording capacity than the DVD;

the method comprising a step, in which the content server transmits data of the content authored for DVD as a disk image file, which includes data to be treated as main data in a sector of the DVD and header information of the sector;

the method comprising the steps of;

dividing the disk image file into packets of a transport stream,

adding an extended packet header to each of the divided packets of the transport stream, thereby forming a source packet as units of data of the large-capacity optical disk,

collecting a predetermined number of the source packets, thereby forming an arrangement unit,

collecting a predetermined number of the arrangement units, thereby forming an error correction cluster of the large-capacity optical disk,

collecting a predetermined number of the sectors of the DVD, thereby forming and storing a sector group while bringing the sector group into correspondence with the predetermined number of the source packets,

adding a control packet to the predetermined number of the source packets corresponding to the sector group, thereby forming units of conversion between the sector group and the source packets,

collecting a predetermined number of the units of conversion, thereby bringing them into correspondence with an integral number of the arrangement units, and

storing a cluster-number of the error correction cluster of the large-capacity optical disk, at which a leading sector of the sector group of the DVD is stored, in the control packet; and

wherein in the disk image file containing a leading portion of the file system area of the DVD, the source packets are brought into correspondence so that the leading portion of the file system area coincides with both a leading portion of the arrangement unit and a leading portion of the error correction cluster, and

the disk image file is recorded using a length as a unit, which causes a boundary of the units of conversion to coincide with a boundary of the error correction clusters or data padding is performed as necessary so that an ending portion of the disk image file terminates at the coincided boundaries of the units of conversion and of the error correction clusters.

8. The information recording method according to claim 7, wherein the data to be recorded in each of the lead-in area, the file system area, the user file area, and the lead-out area of the DVD are recorded as an individual disk image file or a set of predetermined collected disk image files.

9. The information recording method according to claim 7, wherein if the data of the content authored for DVD are data on a dual-layer DVD which includes a first recording layer and a second recording layer as information recording layers, the source packets are brought into correspondence so that a leading portion of the data area of the second recording layer coincides with both the leading portion of the arrangement unit and the leading portion of the error correction cluster.

10. The information recording method according to claim 7, wherein the disk image file of the content authored for DVD is caused to include data, to which a predetermined copyright protection scheme for DVD is applied.

11. The information recording method according to claim 7, wherein the data of the disk image file of the content authored for DVD are caused to have a function of performing a protection using a predetermined copyright protection scheme for the large-capacity optical disk.

12. The information recording method according to claim 7, wherein identification information for disabling a user access to data of a part corresponding to the lead-in area of the DVD among data of the disk image file of the content authored for DVD is recorded in the control packet.

18. An information transmitting apparatus comprising:

a means for converting content data including a video signal to a program stream by compressing coding;

a means for dividing the program stream into packs with a constant length which are units to be stored on a sector of the record medium;

a means for error-correction coding data of the divided packs by forming an error correction block from the predetermined number of sectors;

a means for dividing the error-correction coded data arranged in order of recording on a track on a record medium into units of storing in a packet of the transport stream; and

a means for transmitting the transport stream in units of the packet;

wherein;

the means for dividing the error-correction coded data into the units of storing in the packet of the transport stream, sets the units of storing in the packet of the transport stream to be an error correction code word when the error correction block is formed and the error-correction coding is performed,

an integer number of error correction clusters are formed from a predetermined number of consecutive packets after the transmitting in units of the converting,

the units of the converting includes a control packet,

the sector group is formed by collecting the predetermined number of sectors, and

a cluster-number of the error correction cluster for storing a leading sector of the sector group is stored in the control packet.

19. An information recording apparatus comprising:

a means for converting content data including a video signal to a program stream by compressing coding;

a means for dividing the program stream into packs with a constant length which are units to be stored on a sector of the record medium;

a means for error-correction coding data of the divided packs by forming an error correction block from the predetermined number of sectors;

a means for dividing the error-correction coded data arranged in order of recording on a track on a record medium into units of the storing in a packet of the transport stream; and

a means for recording the transport stream to be transmitted in units of the packet on the record medium;

wherein;

the means for recording forms an integral number of error correction clusters using the predetermined number of consecutive packets as units of conversion,

the units of the converting includes a control packet,

the sector group is formed by collecting the predetermined number of sectors, and

a cluster-number of the error correction cluster for storing a leading sector of the sector group is stored in the control packet, and

the data of the transport stream are recorded so that a length which causes a boundary of the units of conversion to coincide with a boundary of the error correction clusters is treated as a unit or data padding is performed as necessary so that an ending portion of the data of the transport stream terminates at the coincided boundaries of the units of conversion and of the error correction clusters.

20. An information transmitting method comprising the steps of:

converting content data including a video signal to a program stream by compressing coding;

dividing the program stream to packs with a constant length which are units to be stored on a sector of the record medium;

error-correction coding data of the divided packs by forming an error correction block from the predetermined number of sectors;

dividing the error-correction coded data arranged in order of recording on a track on a record medium into units of the storing in a packet of the transport stream; and

transmitting the transport stream in units of the packet;

wherein in the step of dividing the error-correction coded data into the units of the storing in a packet of the transport stream, the units of the storing in the packet of the transport stream is set to be an error correction code word when the error correction block is formed and error-correction coding is performed,

wherein an integer number of error correction clusters are formed from a predetermined number of consecutive packets after the transmitting in units of the converting,

the units of the converting includes a control packet,

the sector group is formed by collecting the predetermined number of sectors, and

a cluster-number of the error correction cluster for storing a leading sector of the sector group is stored in the control packet.

21. An information recording method comprising the steps of:

converting content data including a video signal to a program stream by compressing coding;

dividing the program stream to packs with a constant length which are units to be stored on a sector of the record medium;

error-correction coding data of the divided packs by forming an error correction block from the predetermined number of sectors;

dividing the error-correction coded data arranged in order of recording on a track on a record medium into units of the storing in a packet of the transport stream; and

recording the transport stream to be transmitted in units of the packet on the record medium;

wherein in the step of recording,

an integral number of error correction clusters is formed using the predetermined number of consecutive packets as units of conversion,

the units of the converting includes a control packet,

the sector group is formed by collecting the predetetmined number of sectors, and

a cluster-number of the error correction cluster for storing a leading sector of the sector group is stored in the control packet, and

the data of the transport stream are recorded so that a length which causes a boundary of the units of conversion to coincide with a boundary of the error correction clusters is treated as a unit or data padding is performed as necessary so that an ending portion of the data of the transport stream terminates at the coincided boundaries of the units of conversion and of the error correction clusters.