After the recording phase
begins, the micro-controller inside the CD-R/RW drive always monitors the
status of the buffer. When the drive judges that a Buffer Under run Error
is about to happen, it suspends recording at the appropriate location of the
EFM (Eight-to-Fourteen Modulation) pattern. While the drive stays in suspend
mode, it continues trying to receive data from the host PC to fill-up its
data buffer and subsequently prepares itself to restart recording by accessing
the end of the previously recorded area (EFM pattern).
To continue recording
at the appropriate place, the drive compares the recorded data with the data
in buffer for synchronizing adjacent frames. In simpler terms, it restarts
recording as soon as it exactly locates the last recorded point. Because the
micro-controller in the drive stores the suspended recording address, it controls
the status of both the buffer and the servo-mechanism so that the drive restarts
recording at exactly the previously suspended recording point.
I've had a little phone
conversation with SANYO last week, and they expect that through the year 2000,
a considerable large number of drive manufacturers will adopt this technology,
and even incorporate it in their next generation products, especially for
the 12x+ recording units. Lacie, another high quality CDR- (W) maker, already
announced their support in their upcoming products.
The big question is product
availability. Currently, this technology is and will be shipping at first
with OEM based products. It will begin showing up in retail stores around
the end of Q1, starting of Q2. The first available OEM drive will be the SANYO
CRD-BP2. Currently SANYO doesn't plan to sell these drives to end users nor
retail stores. But as soon as CDR- (W) companies migrate to the BURN-Proof
technology we may see a large variety on sale. Around Q2 2000, Sanyo expects
to see this technology enabled on IDE based drives.
The merit for users
by BURN-Proof function.
- Users can do another
work during recording the data because the recording application also
doesn't have Buffer under Run Error.
Example: While decoding MP3 music, you can do make the MP3 disc at
the same time.
- The coaster discs is
never made as far as it concerns with Buffer under Run Error.
The multi-task will
be available by PC.
Up to now, you can not do any other work by PC while recording the
data, but now, you do not have to suspend the work by Burn-Proof
function even though you are recording data.
- The low performance
PC will also can be applicable for high-speed recording. The actual
recording speed depends on the performance of the data transfer rate
does not always support all kinds of errors. Some errors on CD-R media
may happen under some condition of media's quality, Host PC, Writing
Application, Source Device and so on.