Table of Contents
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To know where all the tracks start on the disk, a Table Of
Contents, also called the TOC of the disk, is placed in the Q
channel during Lead-In. The Main data contains digital silence.
TOC Q Channel Data
SO, $1, CONTROL, 1, <------------------- TOC-data
161
£4
4
72
ZERO(TNO), POINT, MIN, SEC, FRAME, ZERO, PMIN, PSEC, PFRAME,
8
8
8
8
8
8
8
8
8
POINT:
Gives the track number whose starting time is
given in the PMIN, PSEC and PFRAME of the
same subcode frame.
FRAME:
Gives the relative time inside the Lead-In.
PMIN
PSEC
PFRAME: Are the starting point, in Absolute Time, of the track
pointed to by POINT.
Since the tracknumber in
POINT is BCD encoded, a maximum of 99 tracks
can be placed on a disk.
Every subcode frame is repeated three times with the same Q-
data.
The complete TOC is repeated until the end of Lead-In.
POINT also has three special values in the TOC: AO, A1 and A2.
For the Red Book (CDDA):
POINT =AOQ
PMIN
= TNO of first piece of music
PSEC
= Zero
PFRAME
= Zero
POINT=A1
PMIN
= TNO of last track on disk
PSEC
= Zero
PFRAME
= Zero
POINT =A2
PMIN
= Abs. Time of Lead-Out
PSEC
= Abs. Time of Lead-Out
PFRAME = Abs. Time of Lead-Out
-29-
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