Philips CDR880 - Recording Linking and Error Handling; General Linking Rules for Recordings; Misrecording Causes and Effects

BASICS CDR/RW
2.5.6 The general linking rules
subcode_syne.
(position_on_sdisc)
a —
on_disc
| start_of recording
Figure 12
General linking rules
If a piece of music has been recorded the information will be
written over the pregroove information. To stop the recording
the stop key has to be activated. The writing however
continues writing till 26 (EFM-)frames after next subcode
sync. It is first after that the CD-R drive stops. If later on the
recording on the same disc will be continued, the temporary
table of contents in the PMA of the disc carries the informa-
tion of the last recording and drives the spot (Light Device
Unit) to the end of that recorded track. To link to that position
the recorder looks for the last recorded subcode sync frame-
number. When the recording is activated, the recorder starts
reading the first of the extra recorded 26 EFM-frames to
assure the timing of the registered signal with the timing of the
new recording signal. After those 26 EFM-frames the writing
starts really. In this way the EFM signal is adapted to the
conventional standard.
2.5.7 Misrecording
Misrecording may occur if during a recording there is a heavy
bump against the recorder. Then the spot may be lost from
the pregroove. During the recording only at every 13.3 ms the
recorder reads the pregroove information. If the times of ATIP
do not continue consecutively, caused by the bump, the
recording will be stopped. The laser will be switched off but
the CD-recordable disc is irreparable damaged. To anticipate
to this phenomenon it is necessary to prevent bumps during
recording.
See also shock sensitivity, paragraph 3.2.1.4.
Bumps that stop the recording on the CD-ReWritable disc are
not destroying this disc. However the recording of the piece of
music has failed. With the erasing facility the failed track can
be erased and in case the original piece of music is still
available a new recording can be re-started.
After a number of recordings it is also possible to erase that
complete disc for re-use.
A CD-ReWritable disc can be played back on CD-players
prepared for ReWritable Discs after finalizing
(current CD-players are not prepared).
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