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5.1.3. CD-R / CD-RW Data Configurations
Before writing
CD-R / CD-RW disc contains time-code information called ATIP.
ATIP is abbreviation of "Absolute Time In Pre-groove" in the wobbling groove by modulating
the carrier frequency.
(Address information is pre-formatted to ATIP on the CD-R / CD-RW disc and method for the
guide groove to wobble by FM modulation.)
Figure 9 shows the composition of ATIP.
Address
(n-1)
n
n+1
n+2
Address
Address
Address
Synchronization
Min
Sec
Frame
CRC
(4 bit)
(8 bit)
(8 bit)
(8 bit)
(14 bit)
Figure 9 CD-R / CD-RW Disc ATIP Data Configuration
After Writing
Data are written in CD format synchronizing with ATIP.
5.1.4. DVD-R/-RW Data Configurations
Before writing
DVD-R / -RW disc contains ECC block address embossed as the pre-pit information on the land.
The ECC block address is the absolute physical of the track., and corresponds to 16 sector, equal in
size to 1 ECC block to be recorded in the groove.
Figure 10 shows the ECC block address stricture.
16 bytes
ECC block address
(N)
(3 bytes)
16 bytes
ECC block address
(N+1)
16 bytes
ECC block address
(N+2)
ECC block address
Parity A
(3 bytes)
Field ID
(1 bytes)
(6 bytes)
Disc information or ECC block
address
Parity B
(3 bytes)
Figure 10 ECC block address structure of DVD-R/-RW disc
After writing
The data is written in DVD-ROM format synchronizing with ECC block address.
