Information recording medium, information...

Details Information recording medium, information... Information recording medium, information...

2000-06-26

2004-09-07

Nguyen, Huy (Department: 2615)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C386S349000, C386S349000, C386S349000

Reexamination Certificate

active

06788876

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an information recording medium, an information recording/reproduction system apparatus and an information recording/reproduction method for managing AV (audio/video) data by using a file structure.
2. Description of the Related Art
An optical disk is a type of information recording medium which has a sector structure. In recent years, the recording density and the capacity of an optical disk have been increased, and optical disks usable in multimedia applications have been developed. Accordingly, it has become important to increase the access speed so that it is possible to interactively reproduce data using a plurality of data sets. A DVD-video disk has been developed as an optical disk capable of interactively reproducing video titles. A DVD-video disk contains AV data which includes a plurality of MPEG program streams and control data which is used for controlling the reproduction of the AV data.
Referring to a directory structure illustrated in
FIG. 9 and a
data structure illustrated in
FIG. 10
, the structure of directories recorded on a DVD-video disk and the relationship between the AV data and the control data will now be described by way of an example. A DVD-video file
908
is recorded using a predetermined file name under a predetermined directory so that a DVD player can easily access data. In particular, a video directory
902
is created under a root directory
901
.
The DVD-video file
908
includes AV data
907
and control data
906
. The AV data
907
and the control data
906
are recorded under the video directory
902
. In particular, the AV data
907
is recorded as a file
904
named “Video.AVD”, and the control data
906
therefor is recorded as a file
903
named “Video.IFO”. A file
905
named “File-A.DAT”, which is used in personal computers, and the like, is recorded in a location other than under the video directory
902
. Therefore, the DVD player will not erroneously reproduce PC data.
Typically, the AV data
907
includes a plurality of video objects (hereinafter, referred to as “VOBs”). In the example illustrated in
FIG. 10
, the AV data
907
includes VOB
1009
and VOB
1010
. The VOB
1009
and the VOB
1010
are both VOBs but differ from each other in terms of the conditions under which video data and audio data represented by the VOBs are compressed or encoded. For example, the VOB
1009
may be AV data of a news program which has been compressed by the MPEG1 data compression scheme, while the VOB
1010
may be AV data of a live baseball program which has been compressed by the MPEG2 data compression scheme. The control data
906
includes a program
1011
for controlling the reproduction of the AV data
907
and VOB management information
1012
which is used for managing the information of each VOB. The program
1011
includes a program
1001
for controlling the reproduction of the VOB
1009
and a program
1002
for controlling the reproduction of the VOB
1010
. The programs
1001
and
1002
each specify a reproduction start address
1005
and a reproduction end address
1006
of the VOB. The reproduction start address
1005
and the reproduction end address
1006
are specified, respectively, by identification information of each of the VOBs
1009
and
1010
of the AV data
907
and the number of relative bytes with respect to the leading address of each of the VOBs
1009
and
1010
. In the example illustrated in
FIG. 10
, the programs
1001
and
1002
are registered. The program
1001
is programmed to reproduce a portion
1007
of the VOB
1009
, and the program
1002
is programmed to reproduce a portion
1008
of the VOB
1010
. Thus, program data (a VOB) can be partially reproduced by specifying the reproduction start address and the reproduction end address of the VOB. VOB management information
1012
includes VOB management information
1003
for managing the information of the VOB
1009
and VOB management information
1004
for managing the information of the VOB
1010
. Each of the VOB management information
1003
and
1004
includes various information for the VOB such as the type of TV broadcasting system, the resolution, the number of channels for audio data, the compression schemes for video data and audio data, information used for performing a search by specifying the time of AV data, information used for managing location information by GOPs (groups of pictures) defined in MPEG, and the data size of the VOB. A DVD-video disk having recorded thereon information which has the directory structure illustrated in FIG.
9
and the data structure illustrated in
FIG. 10
is reproduced as follows. Application software can read out the control data
906
and interactively reproduce a plurality of VOBs by using a predefined program.
Referring to
FIGS. 7A and 7B
, the relationship between the physical structure of a DVD-RAM disk
700
, which is a rewritable optical disk, and the logical volume space thereof will now be described.
FIG. 7A
illustrates the physical structure of the DVD-RAM disk
700
. The DVD-RAM disk
700
includes a lead-in area
701
, a DMA (defect management area)
702
for managing defects on the disk
700
, a data area
718
, and a lead-out area
716
which are arranged in this order from the inner periphery to the outer periphery of the DVD-RAM disk
700
. Digital data is recorded in each of these areas, and the digital data is managed by a unit called a “sector”. The data area
718
includes a spare area
703
used for replacing defective sectors and an area
719
including a plurality of zones numbered from zone
0
to zone
47
. In each zone, data is recorded in blocks of 2048-byte physical sectors.
Referring to
FIG. 7B
, the physical sectors are numbered with physical sector numbers (PSNS) starting from the inner periphery of the disk
700
. Physical spaces
717
of the disk
700
are specified by PSNs. On the other hand, the space in which user data can be recorded is defined as a volume space
720
which includes a plurality of sectors which are numbered with logical sector numbers (LSNs). In other words, the volume space
720
is equal to the physical space
717
minus the lead-in area
701
, the DMA
702
, the spare area
703
, a defective sector
711
, a guard area
715
provided between two adjacent zones, and the lead-out area
716
. The defective sectors
711
are sectors which have been detected as being defective by a certification operation performed during an initialization of the disk
700
. The PSNs of the defective sectors
711
are registered and managed in a PDL (primary defect list) (not shown) provided in the DMA
702
. A defective sector
721
which have been detected as being defective while recording data onto the disk
700
are replaced with spare sectors from the spare area
703
by a linear replacement method and registered in an SDL (secondary defect list) (not shown) provided in the DMA
702
.
Next,
FIG. 8
illustrates an example of a data structure which would result when the various files as mentioned above are recorded on the rewritable disk
700
by using a volume file structure
800
as defined in the ECMA
167
standard. The upper portion and the lower portion of
FIG. 8
correspond to the inner periphery and the outer periphery of the disk
700
, respectively. Sectors in the volume space
720
are numbered with the logical sector numbers (LSNs) starting from the leading sector of the volume space
720
. A volume structure area
801
includes recorded therein information which is used for logically handling the disk
700
as a volume, as well as location information of a space bit map
821
, and location information of a file entry
822
of the root directory. While the file set descriptor is defined as a file structure according to the ECMA
167
standard, the file set descriptor is treated herein as a volume structure for the sake of simplicity. It is also assumed herein that files are accessed by using their logical sector numbers for the sake of simplicity, though

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