The
IMAGE.DAT file contains (at a minimum) the entire UDF-Bridge
volume for the disc. On the DVD disc, the UDF-Bridge volume
is stored in consecutive 2048 byte Image Data fields within
the data area of the disc.
To
satisfy certain application requirements, the IMAGE.DAT file
can optionally store the CPR_MAI or ID, IED, CPR_MAI, and EDC
in addition to the Image data for each sector of the DVD disc.
Therefore, the DVD Data Layout defines the following three (3)
IMAGE.DAT file formats with record sizes of 2048, 2054 and 2064
Bytes.
Figure
8-1: IMAGE.DAT file Layout if Record Size = 2048 Bytes
|
2048B
Main
Data
(RSN=0)
|
2048B Main Data (RSN=1) |
2048B Main Data (RSN=2) |
-------------------
|
2048B Main Data (RSN=N) |
Figure
8-2: IMAGE.DAT file Layout if Record Size = 2054 Bytes
|
6B CPR_MAI |
2048B Main Data |
6B CPR_MAI |
2048B Main Data |
--------------
|
6B CPR_MAI |
2048B Main Data |
|
(RSN=0) |
(RSN=1) |
(RSN=N) |
Figure
8-3: IMAGE.DAT file Layout if Record Size = 2064 Bytes
|
4B
ID
|
2B
IED
|
6B
CPR_
MAI
|
2048B
Main
Data
|
4B
EDC
|
4B
ID
|
2B
IED
|
6B
CPR_
MAI
|
2048B
Main
Data
|
4B
EDC
|
4B
ID
|
2B
IED
|
6B
CPR_
MAI
|
2048B
Main
Data
|
4B
EDC
|
|
(RSN=0) |
(RSN=1) |
(RSN=N) |
Note: The
contents for the ID, IED and EDC,(required for Record Size =
2064 0nly) are not defined in this specification. Please refer
to DVD Version 1.0 Specification for Read-Only Disc (Part 1
Physical Specifications) for these description.
Note: The
specifications for the UDF-Bridge file system is not defined
in this specification. Please refer to the DVD version 1.0 Specification
(Part 2: File System Specifications) for a complete description.
Note: The
CPR_MAI Data of IMAGE.DAT shall conform to the DVD version 1.0
Specification (Part 1: Physical Specification).
