Toshiba SR-C8002 11/24

11/24 SR-C8002 Rev.1.0

5.Functions

5.1. Disc Data Configurations

5.1.1. CD-ROM Data Configurations

Figure 5 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

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

SYNC

12 bytes

~ ~ ~ ~

~ ~

Figure 5 CD-ROM Disc Data Configuration

5.1.2. 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 6 shows the composition of ATIP.

Address

(n-1)

n+1

n+2

Address

Synchronization

Min

Sec

Frame

CRC

(4 bit)

(8 bit)

(14 bit)

Figure 6 CD-R / CD-RW Disc ATIP Data Configuration

After Writing

Data are written in CD format synchronizing with ATIP.