Toshiba SD-R6112 specifications 14/28, Shows the composition of Atip

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.

(n-1) Address

n Address

n+1

Address

n+2 Address

Synchronization (4 bit)

Min	(8 bit)
Sec	(8 bit)
Frame	(8 bit)
CRC	(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.

ECC block address

(N) 16 bytes

ECC block address (N+1)

16 bytes

ECC block address (N+2)

16 bytes

ECC block address (3 bytes)

Parity A (3 bytes)

Field ID (1 bytes)

Disc information or ECC block address

(6 bytes)

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.

14/28 SD-R6112 Rev.1.0