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5.Functions
5.1. Disc Data Configurations
5.1.1. DVD-ROM Data Configurations
Figure 7 shows how data is constructed in the case of dual layer/parallel track data DVD disc.
The DVD spec defines the single layer, the dual layer/opposite and parallel track disc, that the
DVD-ROM drive supports. For details refer to DVD Book Part 1.
1 block=1/676 s
ID Data (Dual layer Parallel track path)
0
1
Lead-in
Area
1 - Disc
ECC Block 1
2
3
4
5
6
2
3
4
6
5
Approx. 130 k
ECC Block
ID No.
xxh - 2FFFFh
xxh - 2FFFFh
ID Data(4B)
ID Data EDC(2B)
Reserved (6B)
Main Data
(2048B)
nnnn
EDC (4B)
EDC(4B)
nnnn+15
ECC(160B)
Sector Format Type
Tracking Method
Refectivity
Area Type:
Data Area
Lead-in Area
Lead out Area
ECC Block 1
Lead-out
Area
Data
Area
ID No.
ID Data(4B)
ID Data EDC(2B)
Reserved (6B)
Main Data
(2048B)
Layer
No.
Data
Area
Lead-in
Area
Approx. 130 k
ECC Block
Lead-out
Area
Layer Number:
Layer 0
Layer 1
Information
~~
~~~ ~ ~ ~
Figure 7 DVD-ROM Disc Data Configuration
5.1.2. CD-ROM Data Configurations
Figure 8 shows how the data is structured in program units
1 block=1/75 s
TimeTNO
TOC
0Lead-in
Min
Sec
Block
Block 1
Min
Sec
Block
1
Block 2
2approx.
300 k-Blocks
AA Lead out
1-Disc
Header
Minutes
Second(0~59)
Blocks(0~74)
Mode
4 bytes
User Data
2048 bytes in Mode-1
2336 bytes in Mode-2
ECC (Mode-1)
288 bytes